JPH11226674A - Die for pressing, and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten a die manufacturing time by providing a positioning means to position a lower die insert block to regulate the movement, and a movement regulating means to regulate the movement of the lower die insert block in the direction orthogonal to the lower die insert block having the positioning means. SOLUTION: A lower die insert block 21 is arranged in a corner of a plane 1a, and fitted to a pin hole of a positioning means 20b so as to be positioned and regulated in movement, and fixed to a lower die base. The lower die insert blocks 21, 22, 24 are arranged on the plane 1, and regulated in movement by movement regulating means 20c, 20d comprising a key groove and a projection, and fixed to a lower die base. A lower die insert block 23 is slidably mounted on the lower die base by the movement regulating means 20c, and fixed to the lower die base. The rest of lower die insert blocks 25, 26 are arranged on the plane 1, and fixed to the lower die base.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal mold preferably used for press-molding a large-sized panel, and a method for manufacturing the same.

[0002]

2. Description of the Related Art Conventional dies used for press molding of large panels include an upper die and a lower die which are provided so as to be separated from each other and relatively movable in a direction close to each other. And a blank holder capable of gripping the outer periphery of the panel to be formed.The upper mold, the lower mold, and the blank holder are each formed of an integrated large casting. In addition, cutting and polishing processes such as copying and finishing are performed to obtain a mold having a smooth surface.

[0003] However, castings require multiple stages of cutting and polishing in order to finish the surface smoothly, and the number of steps required to complete them is large. Therefore, there is a problem that the production period is prolonged and the cost is increased. In addition, since a large-sized cutting and polishing machine is required to process an integrated large casting, the large-sized cutting / polishing machine is required to manufacture the upper, lower, and blank holders simultaneously. It is necessary to install a plurality of processing machines. In this case, a large capital investment is required. If each mold is manufactured by one large processing machine,
Although the capital investment can be suppressed, the manufacturing period becomes longer, and in any case, there is a problem that the cost is increased.

Therefore, as a mold for solving the above problem,
A technique described in Japanese Patent Publication No. 5-26573 has been proposed. In this mold, small blocks that have been precisely divided and cast in advance using separate molds are assembled and fixed together.
Therefore, large molds are not required and cost can be reduced, and small blocks are further cut and polished to make the surface smoother.
The need for a large processing machine is eliminated, and costs can be reduced.

[0005]

However, in the above-mentioned conventional press-molding dies, it has been desired to shorten the mold-production period for the following reasons. That is, when the mold is large, it is easier to manufacture and process each block by dividing it into as many blocks as possible. Therefore, when the mold is divided into a plurality of rows and columns, if all the blocks are positioned one by one by the positioning means and then fixed by the fixing means, it takes a lot of trouble. Therefore, it has been desired to make it possible to quickly arrange and fix the blocks at an accurate position, thereby reducing the manufacturing labor and cost, and shortening the mold manufacturing period. Further, when an upper die, a lower die, and a blank holder are manufactured as the press molding dies, the press working cannot be started unless all the dies are finished. Therefore, when producing three molds, an upper mold, a lower mold, and a blank holder, it has been desired to shorten the overall mold production period of all the molds. In view of the above, the present invention provides a press molding die and a method for manufacturing the same, which can accurately and quickly arrange and fix a plurality of divided blocks, and provide a press molding die. The aim is to shorten the manufacturing period of all molds, and to review the process for producing three molds, upper mold, lower mold, and blank holder, to shorten the overall production time of all molds. The purpose is.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, an invention according to claim 1 comprises an upper die and a lower die which are provided so as to be able to move relative to each other in a direction away from each other and to approach each other. A blank holder interposed between the lower mold and the upper mold, the blank holder being capable of holding an outer peripheral portion of the molded panel together with the upper mold, wherein the lower mold has a flat lower mold base; A plurality of lower die insert blocks arranged and fixed in a plurality of rows and columns on the plane of the base, the lower die insert being arranged at one corner of the flat die. Positioning means is provided between the block and the lower die base to position and regulate the movement of the lower die insert block, and the lower die block is vertically aligned with the lower die insert block with the positioning means. Mold insert Each lower die is located between the lock and the lower die base, and between the lower die insert block with the positioning means and the lower die insert block and the lower die base arranged in the same horizontal direction. It is characterized in that a movement restricting means for permitting the movement of the insert block in a direction in which the insert block is in close contact with the lower mold insert block with the positioning means and for restricting the insert block in a direction perpendicular thereto is provided.

According to a second aspect of the present invention, there is provided a method of manufacturing the press-molding die according to the first aspect, wherein a block manufacturing step of manufacturing a plurality of lower mold insert blocks, and a lower mold base having a flat surface are provided. A base manufacturing step of manufacturing a base, and a block fixing step of arranging and fixing each of the lower mold insert blocks in a plurality of rows and columns on the plane of the lower mold base,
In the block fixing step, first, a lower mold insert block with positioning means, after arranging at a corner of the plane and positioning and regulating movement by the positioning means, fixed to the lower mold holder by fixing means, Next, a lower insert block arranged in the same vertical direction as the lower insert block with the positioning means, and a lower insert block arranged in the same horizontal direction as the lower insert block with the positioning means, respectively To
In order from the side closer to the lower die insert block with the positioning means, the lower die is disposed on the flat surface while being pressed against the side surface of the lower die insert block previously disposed on the flat surface, and the movement is restricted by the movement restricting means. After fixing to the holder with fixing means, and then placing the remaining lower insert block on the plane while pressing in the direction of the corner formed by the lower insert block previously disposed on the plane,
It is characterized by being fixed to the lower mold holder by fixing means.

According to a third aspect of the present invention, there is provided an upper mold and a lower mold which are provided so as to be relatively movable in a direction of being separated from each other and approaching each other, and interposed between the upper mold and the lower mold, together with the upper mold. A blank holder capable of holding an outer peripheral portion of a molded panel, wherein the upper die has an upper die base having a concave portion, and a rectangular parallelepiped backup block provided along two adjacent side surfaces of the concave portion. And a wedge-shaped backup key provided along the remaining two side surfaces of the concave portion, and a plurality of rows and columns arranged and fixed in the concave portion in a state in which the side surface is in close contact with the backup block or the backup key. A plurality of upper die insert blocks, and a press molding die comprising:
An insert block whose two side faces are finished is disposed at one corner of the recess, and a backup block is provided for positioning and restricting the movement of the insert block in a state of being in close contact with the two side faces of the insert block.

According to a fourth aspect of the present invention, there is provided a method of manufacturing the press-molding die according to the third aspect, comprising a block manufacturing step of manufacturing a plurality of upper die insert blocks, and an upper die having a recess. A base manufacturing step of manufacturing a base, and a block fixing step of arranging and fixing each of the upper die insert blocks in a plurality of rows and columns on a plane of the upper die base,
In the block fixing step, first, a backup block is attached to each of two adjacent side surfaces of the concave side surfaces, and then, an upper die insert block with a finish processing surface is attached to the backup block by two.
After arranging at one corner of the concave portion by abutting the side surfaces, positioning and movement are restricted by positioning means, and then, the upper die insert block arranged in the same longitudinal direction as the upper die insert block with the finishing surface , And the upper die insert block with the finishing surface and the upper die insert block arranged in the same row in the lateral direction, in order from the side closer to the upper die insert block with the finishing surface, first on the recess. The upper insert block is disposed in the recess while being pressed against the side surface of the disposed upper insert block and the backup block, and then the remaining upper insert block is formed by the upper insert block previously disposed in the recess. Arranged in the recess while pressing in the direction of the corner, and then the recess in which the backup block is not attached By press-fitting the backup key wedge into the gap between the other two sides and the upper mold insert block surface are brought into close contact with each of the upper mold insert block each other, finally,
Each upper insert block is fixed to the upper base by fixing means.

According to a fifth aspect of the present invention, there is provided an upper die and a lower die which are provided so as to be relatively movable in a direction of being separated from each other and approaching each other, and interposed between the upper die and the lower die. A blank holder capable of gripping an outer peripheral portion of the panel to be formed, wherein the blank holder is provided with a holder base having a concave portion, and a rectangular parallelepiped backup block provided along two adjacent side surfaces of the concave portion. And a wedge-shaped backup key provided along the remaining two side surfaces of the concave portion; and a wedge-shaped backup key disposed and fixed to each corner portion in the concave portion in a state where the two side surfaces are in close contact with the backup block or the backup key. With the four corner holder insert blocks and the backup block or the backup key in contact with one side in close contact. And four intermediate holder insert block is arranged fixed between Na holder insert block, in a press mold which is configured, 4
The movement of the intermediate holder insert block is brought into close contact with the corner holder insert block between the two intermediate holder insert blocks and the holder base, which are disposed at positions facing each other, of the two intermediate holder insert blocks. A movement restricting means is provided to allow the intermediate holder insert block and the four corner holder insert blocks to move the intermediate holder insert block outward. Is formed on the inclined side surface such that a force pressing from the side acts in a direction in which the corner holder insert comes into close contact with the corner holder insert.

According to a sixth aspect of the present invention, there is provided a method of manufacturing the press-molding die according to the fifth aspect, comprising: a block manufacturing step of manufacturing a plurality of holder insert blocks;
A base manufacturing process for manufacturing a holder base having a concave portion, and a block fixing step of arranging and fixing each of the holder insert blocks in a ring shape along the side surface of the concave portion in the concave portion of the holder base. In the block fixing step, first, a backup block is attached to each of two adjacent side surfaces of the concave side surface, and then, the corner holder insert block is brought into contact with the backup block on two side surfaces to form the concave portion. Arranging the intermediate holder insert block having the inclined side surface at one corner, and then pressing the intermediate holder insert block having the inclined side surface against the inclined side surface and the backup block of the corner holder insert block, and an intermediate holder insert block having no inclined side surface. Back up the opposite side of the corner holder insert block One of the two operations, the operation of pressing the lock against the lock and the operation of restricting the movement by the movement restricting means, is performed first, and then the two corner holder insert blocks are connected to the intermediate holder insert disposed earlier. The wedge-shaped backup key is pressed into the gap between the corner holder insert block and the side surface of the recess while pressing the side surface against each of the side surface of the block and the backup block. The holder insert block is brought into close contact with the holder insert block, and then the other intermediate holder insert block having no inclined side face is disposed by pressing against the side face of the corner holder insert block previously disposed in the recess, and the movement restricting means. After the movement is restricted, the intermediate holder insert block Then, the wedge-shaped backup key is press-fitted into the gap, and then the remaining corner holder insert blocks are disposed while pressing the side surfaces against the side surfaces of the intermediate insert block previously disposed. A wedge-shaped backup key is press-fitted into the gap between the groove and the side surface of the concave portion so that the corner insert block and the intermediate holder insert block are in close contact with each other. A wedge-shaped backup key is press-fitted into the gap between the intermediate insert block and the side surface of the concave portion so that the intermediate insert block is brought into close contact with the corner insert blocks on both sides thereof. It is characterized by being fixed to the holder base by .

The invention according to claim 7 is the invention according to claim 2 or 4.
Or the method for producing a press-molding die according to 6 above,
The block manufacturing step and the base manufacturing step are performed in parallel.

According to the present invention, an upper die and a lower die are provided so as to be relatively movable in a direction of being separated from and approaching each other, and the upper die and the lower die are interposed between the upper die and the lower die. A method for manufacturing a press-molding die, comprising: a holder base capable of gripping an outer peripheral portion of a panel to be formed, wherein a plurality of insert blocks of each of the upper die, the lower die, and the holder base are manufactured. A block manufacturing step, a base manufacturing step of manufacturing a base of each of the upper mold, the lower mold, and the holder base, and a block fixing step of positioning and fixing each of the insert blocks to the base. And the base manufacturing process comprises:
One large-sized machine sequentially executes the upper mold base manufacturing process, the lower mold base manufacturing process, and the holder base base manufacturing process, and performs the upper mold and the upper mold during the execution of the base manufacturing process. Each block manufacturing process of the lower mold and the holder base is performed in parallel by a small machine.

(Operation) In the press molding die according to the first aspect of the present invention, when producing the lower mold, the manufacturing method according to the second aspect of the present invention is applied to the block fixing step when producing the lower mold. First, the lower insert block with the positioning means is disposed at one corner of the plane and positioned and regulated by the positioning means. , And those arranged in the same row in the horizontal direction are attached in such a manner that the movement restricting means allows only movement in the direction in which the lower insert block with positioning means is in close contact with the lower insert block with positioning means. The lower insert block is formed by the lower insert block previously placed on the plane. Disposed on a plane while pressing in that the inside corner direction. As described above, when attaching a plurality of lower mold insert blocks to the lower mold base having a flat surface and no reference side surface, positioning is to be performed only for one lower mold insert block. For lower insert blocks with positioning means and lower insert blocks in the same row in the vertical and horizontal directions, movement in one direction is allowed and movement in the direction perpendicular to it is only restricted by means of restricting movement. This makes it easier to reduce the mold production work time.

In the press molding die according to the third aspect of the present invention, when producing the upper mold at the time of producing the mold, the invention according to the fourth aspect is applied, and in the block fixing step, first,
A backup block is attached to each of two adjacent side surfaces among the concave side surfaces of the upper die base, and then the upper die insert block arranged at the corner of the concave portion is brought into contact with the finished two side surfaces against the backup block. Position. Next, the upper insert block arranged in the same vertical direction as the positioned upper insert block, and the upper insert blocks arranged in the same horizontal direction as the positioned upper insert block were positioned. In order from the side closer to the upper insert block, the upper insert block is placed in the recess while being pressed against the side surface of the upper insert block previously placed on the recess and the backup block, and then the remaining upper insert block is placed first. It is disposed in the recess while pressing in the direction of the corner formed by the upper insert block disposed in the recess, and then the remaining two sides of the concave side where the backup block is not attached, the upper insert block and Press the wedge-shaped backup key into the gap between It was in close contact, in the end,
Each upper insert block is fixed to the upper base by fixing means. Therefore, of the plurality of upper insert blocks, only the upper insert block with the positioning means performs positioning, and the other upper insert blocks should be brought into close contact with the positioned upper insert block and the backup block. As a result, the positioning operation is facilitated, and the mold manufacturing operation period can be shortened.

In the press-molding die according to the fifth aspect of the present invention, when producing the blank holder at the time of producing the mold, the invention according to the sixth aspect is applied, and in the block fixing step, first, the concave side surface of the holder base is formed. Adjacent two of
A backup block is attached to each of the side surfaces, and then the corner holder insert block is disposed at one corner of the concave portion with the two side surfaces abutting on the backup block. The side face is pressed against the inclined side surface of the holder insert block and the backup block, and then the intermediate holder insert block having no inclined side surface is disposed by pressing against the opposite side surface of the corner holder insert block and the backup block. With the movement restricting means, and then dispose the two corner holder insert blocks while pressing the side surfaces against the side surfaces of the intermediate holder insert block and the backup block, respectively, which were previously disposed, and the corner holder inserts. Block and concave A wedge-shaped backup key is press-fitted into the gap between the side surfaces to make the corner holder insert block and the intermediate holder insert block in the recess closely adhere to each other, and then the other intermediate holder insert block having no inclined side surface is inserted. After being pressed against the side surface of the corner holder insert block previously disposed in the recess and being restricted by the movement restricting means, the wedge-shaped backup key is inserted into the gap between the intermediate holder insert block and the concave side surface. Then, the remaining corner holder insert blocks are disposed while pressing the side surfaces against the side surfaces of the intermediate insert block that has been previously disposed, and the gap between the two side surfaces of the corner insert block and the side surface of the concave portion is inserted. Press-fit a wedge-shaped backup key to insert the corner insert block and intermediate holder Brought into close contact with the lock, then placed the remaining intermediate insert block having an inclined side surface between two corners insert blocks,
A wedge-shaped backup key is press-fitted into the gap between the intermediate insert block and the side surface of the concave portion so that the intermediate insert block is brought into close contact with the corner insert blocks on both sides thereof. Fixed to Accordingly, since the positioning of each holder insert block is performed by bringing the holder insert block into close contact with the backup block, the positioning operation is facilitated, and the period of the mold manufacturing operation can be shortened.

According to the present invention, since each insert block is divided and small, it can be manufactured by a small manufacturing machine. Further, since each base is large, a large manufacturing Manufactured by machine. As described above, since each insert block and each base have different manufacturing machines, the block manufacturing process and the base manufacturing process can be performed in parallel. In addition, even if a plurality of small manufacturing machines are installed, the cost is not as high as that of a large machine. Therefore, a plurality of insert blocks can be manufactured simultaneously using a plurality of manufacturing machines.

In the invention according to claim 8, the base manufacturing process for manufacturing the upper mold, the lower mold and the holder base is performed by one large machine by using the upper mold base manufacturing process and the lower mold base manufacturing process. And the base manufacturing process of the holder base are sequentially executed, and during the execution of the base manufacturing process,
A block manufacturing process for manufacturing a plurality of insert blocks for each of the upper mold, the lower mold, and the holder base is performed.
Therefore, each of the upper die, lower die and holder base,
A block fixing step of positioning and fixing each insert block to the base can be performed at the same time, and the entire mold manufacturing period can be shortened.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, a press molding die according to an embodiment will be described in detail with reference to FIGS. In addition,
In describing the embodiments, a case where the present invention is applied to a press molding die for an automobile door inner panel will be described as an example. FIG. 1 is a cross-sectional view of a press molding die according to an embodiment, FIG. 2 is a plan view of an upper die of the press molding die of the embodiment, and FIG. 3 is a lower die of the press molding die of the embodiment. FIG. 4 is a process explanatory view showing an upper mold manufacturing method, FIG. 5 is a process explanatory view showing a lower mold manufacturing method, and FIG. 6 is a process explanatory view showing a blank holder manufacturing method. .

First, the structure of the press mold will be described with reference to FIG. FIG. 1 is a cross-sectional view of a press-molding mold P according to the first embodiment. The mold P holds an outer peripheral portion of a work W which is a panel to be molded by an upper mold PU and a blank holder BH. The work W is formed into a desired shape by the PU and the lower die PD.

The lower die PD includes a lower die base 1 having a flat surface 1a, and a lower die insert block 20 fixed on the flat surface 1a of the lower die base 1. An insert block 20 forms a lower mold forming surface 20a that is convex upward. The lower insert block 20 is actually formed as shown in FIG.
Each of the lower insert blocks 21 to 26 is constituted by the lower insert blocks indicated by reference numerals 4, 25 and 26. When the individual blocks 21 to 26 are individually indicated, reference numerals 21 to 26 are used and all the lower insert blocks 21 to 26 are put together. When indicating, the reference numeral 20 is used.

Returning to FIG. 1, the upper die PU includes an upper die base 3 having a concave portion 3a, an upper die insert block 40 fixed in the concave portion 3a of the upper die base 3, and A rectangular parallelepiped backup block 3b and a wedge-shaped backup key 3c are provided between the side surface of the concave portion 3a and the upper die insert block 40. The upper die insert block 40 forms a lower die. A concave upper mold forming surface 40a corresponding to the surface 20a is formed, and a holder surface 40b having a shape corresponding to the blank holder BH is formed around the upper mold forming surface 40a. The upper insert block 40
2 are formed of upper insert blocks 41 to 46 as shown in FIG.
Reference numeral 40 is used when indicating 1 to 46 collectively. The upper die base 3 is supported by guide posts 1b (see FIGS. 2 and 3) erected at four corners of the lower die base 1, and the upper die PU and the lower die The PDs are relatively movable in a direction away from each other and close to each other (vertical direction in FIG. 1).

Returning to FIG. 1, the blank holder BH is
Holder base 5 having concave portion 5a, rectangular parallelepiped backup block 5b provided along two adjacent side surfaces of concave portion 5a, and wedge-shaped backup block provided along the remaining two side surfaces of concave portion 5a A key 5c. As shown in FIG. 3, four corner holder insert blocks 51, 52, 53, and 54 are provided at each corner in the recess 5a, and are provided between the corner holder insert blocks 51 to 54. The four intermediate holder insert blocks 55, 56, 57, 58
As shown in FIG. 1, the eight holder insert blocks 51 to 58 (in the case of collectively indicating these, are referred to as holder insert blocks 50), and the upper die insert block 40. The holder surface 50a having a shape corresponding to the holder surface 40b is formed. In addition, a concave portion and a convex portion are provided at positions corresponding to both of the opposed holder surfaces 40b and 50a as slip stoppers when the workpiece W is gripped. Further, as shown in FIG.
The lower insert block 20 is arranged in the shape of a ring inside the ring a and moves up and down in the ring formed by the holder insert block 50.

As shown in FIG. 2 which is a plan view of the upper die PU, the upper die insert blocks 40 are disposed in the concave portion 3a of the upper die base 3 in three longitudinally two rows.
The backup block 3b is provided along two adjacent side surfaces of the concave portion 3a, and the backup key 3c is provided along the remaining two side surfaces of the concave portion 3a. The backup block 3b
In addition, at least one backup key 3c is provided on one side surface of each of the upper die insert blocks 41 to 46. The insert block 43 is finished by a small machine so that its two side surfaces 43a, 43a can be positioned with respect to the concave portion 3a of the upper die base 3. The insert block 43 is positioned at one corner of the concave portion 3a and is restricted in movement while the two side surfaces 43a, 43a are in close contact with the side surface of the backup block 3b.

As shown in FIG. 3 which is a plan view of the lower die PD and the blank holder BH, three lower die insert blocks 20 are arranged in two rows 2 in the longitudinal direction.
Lower mold insert block 2 arranged at one corner of a plane
Between the lower mold base 1 and the lower mold base 1, there are provided two positioning means 20b each formed of a pin and a hole for positioning the lower mold insert block 21 and restricting the movement thereof. Also, between the lower die insert blocks 22 and 23 and the lower die base 1 which are arranged in the same longitudinal direction as the lower die insert block 21 having the positioning means 20b, and the lower die having the positioning means 20b. Between the lower insert base 24 and the lower insert block 24 arranged adjacent to the die insert block 21 in the lateral direction, the movement of each of the lower insert blocks 22, 23, 24 is controlled by the lower insert block 21. There is provided a slot-like key groove for allowing a direction in which the key groove is in close contact with the key groove, and a movement restricting means 20c, 20c, and 20d composed of a projection for sliding the key groove.

In the blank holder BH, the backup block 5b is provided along two adjacent side surfaces among the side surfaces of the concave portion 5a, and the backup key 5c is provided along the remaining two side surfaces of the concave portion 5a. It is provided. At least one of the backup block 5b and the backup key 5c is in contact with one side surface of each of the holder insert blocks 51 to 58.

Further, of the intermediate holder insert blocks 55 to 58 located at positions opposing each other, the intermediate holder insert blocks 55 and 57 extending in the longitudinal direction and the holder base 5 are provided with intermediate holder insert blocks. The movement of the keyholes 55 and 57 is allowed in the direction in which the corner holder insert blocks 51 to 54 are in close contact with each other, and is restricted in the direction perpendicular thereto. Means 50
b, 50b are provided.

Further, the remaining two intermediate holder insert blocks 56 and 58 and the corner holder insert block 5
The surfaces that come into contact with each other 1 to 54 are in the direction in which the intermediate holder insert blocks 56 and 58 come into close contact with the corner holder insert blocks 51 to 54 when a force that presses the intermediate holder insert blocks 56 and 58 from the outside to the inside acts. A sloping side surface 50c having a sloping function is formed.

Hereinafter, a method of manufacturing the upper die PU will be described with reference to FIG.

When manufacturing the upper mold PU, first, a block manufacturing process of machining a plurality of small rectangular blocks made of casting using a small machine to manufacture the upper insert blocks 41 to 46; Is performed in parallel with the base manufacturing process of manufacturing the upper die base 3 using Therefore,
The block manufacturing process and the base manufacturing process can proceed at the same time, and the time of the manufacturing process can be reduced.

And, these upper die insert blocks 4
After the manufacture of the upper mold bases 1 to 46 and the upper mold base 3, the upper mold insert blocks 41 to 46 are arranged and fixed in two rows in the longitudinal direction inside the recesses 3 a of the upper mold base 3, and the illustrated block fixing step ( Perform i) to (iii).

(I) First, the backup block 3b is provided on each of two adjacent side surfaces among the side surfaces of the concave portion 3a.
Is mounted by positioning its end face position. Next, the finishing surfaces 43a, 43 of the upper die insert block 43
a is positioned at one corner of the concave portion 3a by abutting two side surfaces forming an angle of 90 degrees of the backup block 3b.

(Ii) Next, the upper insert blocks 42, 41 arranged adjacent to the upper insert block 43 in the longitudinal direction and the upper insert blocks 46 arranged adjacent to the shorter insert direction. Are arranged in the concave portion 3a while being pressed against the side surfaces of the upper insert block 43 and the backup block 3b, which are arranged earlier, in order from the side closer to the upper insert block 43. Therefore, each upper die insert block 41,
42, 46 are adjacent upper insert blocks 42,
Since the positioning is performed only by pressing the side surface 43 and the backup block 3b, the positioning is easy.

(Iii) Next, the upper insert block 45
Are pressed in the direction of the corner formed by the upper die insert blocks 42 and 46 disposed earlier, and the upper die insert block 44 is similarly disposed with the upper die insert blocks 41 and 45 disposed earlier. It is arranged by pressing in the direction of the corner formed by the above. Therefore, also in this case, since the upper die insert blocks 41 and 45 are positioned only by pressing against the two side surfaces of the upper die insert blocks 41 to 43 and 46, positioning is easy. Then, the remaining two side surfaces of the concave portion 3a to which the backup block 3b is not attached and the upper die insert block 4
Each of the upper die insert blocks 41 to 4 is press-fitted with a wedge-shaped backup key 3c into a gap between the upper die insert blocks 41 to 44.
The upper insert blocks 41 to 46 are finally fixed to the upper base 3 with bolts (not shown). As described above, since the upper die insert blocks 41 to 46 are positioned only by pressing them against the backup block 3b or by pressing the upper die insert blocks 41 to 46, positioning work is easy. And the backup key 3c
Press-fitting these upper insert blocks 41-46.
Is temporarily fixed and then fixed with bolts, so that fixing work is easy.

Next, a method of manufacturing the lower die PD will be described with reference to FIG. As with the upper PU, the lower P
In the case of manufacturing D, first, a block manufacturing process of manufacturing a plurality of lower die insert blocks 21 to 26 using a small machine and a base manufacturing process of manufacturing the lower die base 1 using a large machine are performed. Perform in parallel. Therefore, also in the case of the lower die PD, the block manufacturing process and the base manufacturing process can be performed simultaneously, and the time of the manufacturing process can be shortened.

Next, each lower mold insert block 21-2
A block fixing step is performed in which three pieces 6 are arranged in two rows in the longitudinal direction on the plane 1a of the lower die base 1 and fixed. (I) In this step, first, the lower die insert block 21 is disposed at one corner of the flat surface 1a, and a pin (not shown) of the positioning means 20b is fitted into the hole to position and regulate the movement, and then to move outside the drawing It is fixed to the lower mold base 1 with bolts (fixing means).

(Ii, iii) Next, the lower mold insert blocks 22 arranged in the same longitudinal direction as the lower mold insert blocks 21 and the lower mold insert blocks 24 arranged in the same lateral direction as the lower mold insert blocks 21 are respectively replaced with the lower mold insert blocks 21. While pressing against the side surface of the insert block 21, it is arranged on the plane 1a,
After the movement is restricted by the movement restricting means 20c and 20d by the key grooves and the projections, it is fixed to the lower mold base 1 with a bolt (not shown).

(Iv) Next, the lower mold insert block 23
Is slidably attached to the lower mold base 1 by the movement restricting means 20c in the longitudinal direction, pressed against the longitudinal side surface of the lower mold insert block 22, and fixed to the lower mold base 1 with bolts (not shown).

(V) Next, the remaining lower mold insert blocks 25 and 26 are pressed onto the flat surface 1a while pressing one corner against the corner formed by the lower mold insert blocks 21 to 24 previously disposed on the flat surface 1a. And fixed to the lower mold base 1 with bolts (not shown).

As described above, only one lower mold insert block 21 is fixed at the time of positioning.
With respect to the other lower mold insert blocks 22, 23, and 24, the movement restricting means 20c, 2 that allows the slide in the direction of pressing against the lower insert block 21 serving as a reference.
0d, the positioning operation is easy, and the remaining lower insert block 25,
As for 26, 2 of the entry corner by each block 22 to 24
Since the positioning is performed using the side surface, the positioning operation is further facilitated.

Next, the blank holder BH will be described with reference to FIG.
A method of manufacturing the device will be described. Upper PU and Lower P
Similarly to the case of D, when manufacturing the blank holder BH, first, a block manufacturing process of manufacturing a plurality of holder insert blocks 51 to 58 using a small machine, and the holder base 5 using a large machine. The base manufacturing process to be manufactured is performed in parallel. Therefore, this blank holder B
Also in the case of H, the block manufacturing process and the base manufacturing process can be performed simultaneously, and the time of the manufacturing process can be reduced.

Next, each of the holder insert blocks 5
A block fixing step of arranging and fixing the rings 1 to 58 in the concave portion 5a of the holder base 5 in a ring shape is performed. (I) In this step, first, the backup block 5b is attached to each of two adjacent side surfaces among the side surfaces of the concave portion 5a, and then the corner holder insert block 51
Is disposed at one corner of the concave portion 5a with two side surfaces abutting on the backup block 5b.

(Ii) Next, the intermediate holder insert block 58 is disposed by pressing the corner holder insert block 51 and the inclined side surface 50c together and pressing the side surface against the backup block 5b. Next, the intermediate holder insert block 55 is disposed by being pressed against the corner holder insert block 51 and the backup block 5b, and the movement is restricted by fitting a key groove (not shown) of the movement restricting means 50b with a projection.

(Iii) Next, the two corner holder insert blocks 52, 54 are disposed while pressing the side surfaces against the side surfaces of the intermediate holder insert blocks 55, 58 and the backup block 5b, respectively. The corner holder insert blocks 52, 54
The backup key 5c is press-fitted into the gap between the groove 5a and the side surface of the recess 5a to insert the corner holder insert block 5 in the recess 5a.
2 and 54 and the intermediate holder insert blocks 55 and 58 are brought into close contact with each other.

(Iv) Next, the other intermediate holder insert block 57 having no inclined side surface 50c is inserted into the corner holder insert block 5 previously disposed in the recess 5a.
4 and the movement restricting means 5.
The movement is restricted by fitting the key groove (not shown) of FIG. 0b with the protrusion, and the backup key 5c is press-fitted between the key groove and the end face of the recess 5a of the holder base 5. Further, the remaining corner holder insert block 53 is first inserted into the recess 5a.
The backup key 5c is press-fitted into the gap between the two side surfaces of the corner insert block 53 and the side surface of the concave portion 5a, while being pressed against the side surface of the intermediate holder insert block 57 disposed therein. The block 53 and the intermediate insert block 57 are brought into close contact with each other.

(V) Then, the remaining intermediate holder insert block 56 is disposed such that the two corner holder insert blocks 52, 53 and the inclined side surfaces 50c are in contact with each other, and the intermediate holder insert block 56 and the recess 5a are provided.
The backup key 5c is press-fitted into the gap with the side surface of the intermediate inserter to bring the intermediate holder insert block 56 into close contact with the corner insert blocks 52, 53 on both sides thereof. Finally, each of the holder insert blocks 51 to 58 is fixed to the holder base 5 by bolts not shown.

As described above, even in the case of the blank holder BH, the positioning of each of the holder insert blocks 51 to 58 is simply performed by bringing the holder insert blocks into contact with each surface. 56,
58 and the adjacent corner holder insert blocks 51 to 54 are configured to be brought into close contact by the component force when brought into contact with the inclined side surface 50c, so that the contact work and the positioning work are facilitated.

In the present embodiment, in manufacturing the upper die PU, the lower die PD, and the blank holder BH, the base manufacturing process for manufacturing the lower die base 1 with one large machine, and the upper die base A base manufacturing process for manufacturing the base 3 and a base manufacturing process for manufacturing the holder base 5 are sequentially performed, and during the execution of these three base manufacturing processes, each insert block 20 is formed using a small machine. , 40 and 50 are simultaneously executed. Therefore, the construction period can be significantly reduced.

Although the embodiment of the present invention has been described in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and a design change or the like may be made without departing from the gist of the present invention. Even if present, it is included in the present invention.

[0050]

As described above, according to the first and second aspects of the present invention, the positioning of a plurality of lower die insert blocks is facilitated in manufacturing the lower die, and the time required for the die manufacturing operation is reduced. Is obtained.

According to the third and fourth aspects of the present invention, the positioning of a plurality of upper die insert blocks is facilitated in manufacturing the upper die, and the die manufacturing operation period can be shortened. The effect is obtained.

According to the fifth and sixth aspects of the present invention, in producing a blank holder, the operation of positioning a plurality of holder insert blocks becomes easy, and the effect of shortening the mold production operation period can be obtained. Can be

In the invention according to claim 7, each insert block is divided and small, so that it can be manufactured by a small manufacturing machine. Since each base is large, Since each insert block and each base are manufactured using different machines, the block manufacturing process and the base manufacturing process can be performed in parallel. The manufacturing period can be shortened, and a plurality of insert blocks can be manufactured simultaneously by a plurality of small-sized manufacturing machines, which also has the effect of shortening the mold manufacturing period.

In the invention according to claim 8, the base manufacturing process for manufacturing the upper die, the lower die, and the holder base is performed by one large machine using the upper die base manufacturing process and the lower die base manufacturing process. And the base manufacturing process of the holder base are sequentially executed, and during the execution of the base manufacturing process,
Each of the upper and lower dies and the holder base is configured to execute a block manufacturing process of manufacturing a plurality of insert blocks, so that each base can be manufactured and each insert block can be manufactured at the same time. The effect of shortening can be obtained, and furthermore, the block fixing process of each of the upper die, the lower die, and the holder base can be performed at the same time, and the effect that the entire die manufacturing period can be shortened. can get.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a press molding die according to an embodiment.

FIG. 2 is a plan view of an upper die of the embodiment.

FIG. 3 is a plan view of a lower mold and a blank holder according to the embodiment.

FIG. 4 is a process explanatory view showing an upper mold manufacturing method.

FIG. 5 is a process explanatory view showing a method for manufacturing a lower die.

FIG. 6 is a process explanatory view showing a method for manufacturing a blank holder.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lower die base 1a Flat surface 1b Guide post 20, 21-26 Lower die insert block 20a Lower die forming surface 20b Positioning means 20c Movement restriction means 20d Movement restriction means 3 Upper die base 3a Depression 3b Backup block 3c Backup key 40, 41-41 46 Upper die insert block 40a Upper die forming surface 40b Holder surface 40c Positioning means 43a Finishing surface 5 Holder base 5a Recess 5b Backup block 5c Backup key 50 Holder insert block 50a Holder surface 50b Movement restricting means 50c Inclined side surface 51-54 Corner holder Insert block 55-58 Intermediate holder insert block

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI B21D 37/02 B21D 37/02 A

Claims (8)

[Claims] 1. An upper die and a lower die which are provided so as to be relatively movable in a direction of being separated from and approaching each other, and an outer peripheral portion of a panel to be formed which is interposed between the upper die and the lower die together with the upper die. And a blank holder capable of holding the
Press forming, in which the lower die is composed of a lower die base having a flat surface, and a plurality of lower die insert blocks arranged and fixed in a plurality of rows and columns on the plane of the lower die base. Positioning means for positioning and lowering the movement of the lower die insert block between the lower die insert block and the lower die base arranged at one corner of the plane, Between the lower die insert block and the lower die base arranged in the vertical direction and the lower die insert block with the positioning means, and in the horizontal direction and the lower die insert block with the positioning means. Between the lower die insert block and the lower die base, the movement of each lower die insert block is allowed in a direction in which the lower die insert block with the positioning means is in close contact with the lower die insert block, Press mold is in the direction perpendicular to the record, characterized in that is provided movement restricting means for restricting. 2. A method for manufacturing a press molding die according to claim 1, wherein a block manufacturing step for manufacturing a plurality of lower mold insert blocks and a base manufacturing for manufacturing a lower mold base having a flat surface. And a block fixing step of arranging and fixing each of the lower mold insert blocks in a plurality of rows and columns on the plane of the lower mold base, wherein the block fixing step comprises: Mold insert block,
After being arranged at one corner of the plane and positioned and regulated by the positioning means, it is fixed to the lower mold holder by the fixing means. Next, the lower mold block with the positioning means is arranged in the same longitudinal direction as the lower insert block. The mold insert block, and each of the lower mold insert blocks arranged in the same lateral direction as the lower mold insert block with the positioning means, in order from the side closer to the lower mold insert block with the positioning means, first on a plane After being arranged on a plane while being pressed against the side surface of the lower insert block arranged in and being restricted by the movement restricting means, it is fixed to the lower mold holder by the fixing means. After being arranged on a plane while pressing in the direction of the corner formed by the lower mold insert block previously arranged on the plane, the lower mold Manufacturing method of a press mold, characterized in that the fixed securing means holder. 3. An upper die and a lower die which are provided so as to be relatively movable in a direction of being separated from and approaching each other, and an outer peripheral portion of a panel to be formed which is interposed between the upper die and the lower die, together with the upper die. An upper die having a concave portion, a rectangular parallelepiped backup block provided along two adjacent side surfaces of the concave portion, and a remaining portion of the concave portion. Two wedge-shaped backup keys provided along two side surfaces, and a plurality of upper die inserts arranged and fixed in a plurality of rows and columns in the concave portion with the side surfaces being in close contact with the backup block or the backup key. And an insert block having two side faces finished at one corner of the concave portion. Press mold, characterized in that the backup block is provided with positioning in a state of being in close contact with the two sides of the locking movement restriction. 4. A method for manufacturing a press mold according to claim 3, wherein a block manufacturing step for manufacturing a plurality of upper insert blocks and a base manufacturing for manufacturing an upper base having a concave portion. And a block fixing step of arranging and fixing each of the upper die insert blocks in a plurality of rows and columns on the plane of the upper die base. In the block fixing step, Attach a backup block to each of the two adjacent sides of
Two side surfaces are brought into contact with the backup block to be disposed at one corner of the concave portion for positioning and movement control. Next, the upper die insert is arranged in the same longitudinal direction as the upper die insert block with the finishing surface. Block, and each of the upper insert blocks arranged in the same horizontal direction as the upper insert block with the finishing surface, the upper die insert block with the finishing surface in order from the side closer to the upper insert block with the finishing surface. Placed in the recess while pressing against the side surface of the upper die insert block and the backup block, and then forming the remaining upper die insert block by the upper die insert block previously disposed in the concave portion. And placed in the recess while pressing in the direction of the corner, and then the backup block is attached. A wedge-shaped backup key is pressed into the gap between the remaining two side surfaces of the concave side and the upper die insert block so that the upper die insert blocks are in close contact with each other. A method for producing a press-molding die, characterized by fixing to a base. 5. An upper die and a lower die which are provided so as to be relatively movable in a direction of being separated from each other and approaching each other, and an outer peripheral portion of a panel to be formed which is interposed between the upper die and the lower die together with the upper die. And a blank holder capable of holding the
The blank holder, a holder base having a concave portion,
A rectangular parallelepiped backup block provided along two adjacent side surfaces of the concave portion; a wedge-shaped backup key provided along the remaining two side surfaces of the concave portion; Four corner holder insert blocks arranged and fixed at each corner in the recess with the side surfaces in close contact, and the corner holder insert block with one side in close contact with the backup block or the backup key It is arranged and fixed between 4
In the press-molding die composed of the two intermediate holder insert blocks, of the four intermediate holder insert blocks, between the two intermediate holder insert blocks and the holder base disposed at positions facing each other. Is provided with movement restricting means for permitting the movement of the intermediate holder insert block in a direction in which the intermediate holder insert block is in close contact with the corner holder insert block, and for restricting the movement in a direction orthogonal to the corner holder insert block. A side surface in contact with one of the two corner holder insert blocks is formed on an inclined side surface such that a force for pressing the intermediate holder insert block from the outside acts in a direction in which the intermediate holder insert block comes into close contact with the corner holder insert. Mold for molding. 6. A method for manufacturing a press-molding die according to claim 5, wherein: a block manufacturing step for manufacturing a plurality of holder insert blocks; and a base manufacturing step for manufacturing a holder base having a concave portion. A block fixing step of arranging and fixing each of the holder insert blocks in a ring shape along the side surface of the concave portion in the concave portion of the holder base, wherein, in the block fixing step, A backup block is attached to each of two adjacent side surfaces of the above. Next, a corner holder insert block is disposed at one corner of the concave portion with the two side surfaces abutting on the backup block. Press the holder insert block against the inclined side of the corner holder insert block and the backup block. And an operation in which the intermediate holder insert block having no inclined side surface is pressed against the opposite side surface of the corner holder insert block and the backup block, and is arranged and movement is restricted by the movement restricting means. Is performed first in order, and then the two corner holder insert blocks are arranged while pressing the side surfaces of the intermediate holder insert block and the backup block, respectively, which are arranged earlier, and the corner holder insert blocks are arranged. A wedge-shaped backup key is pressed into the gap between the insert block and the side surface of the concave portion so that the corner holder insert block and the intermediate holder insert block in the concave portion are in close contact with each other. Next, the other intermediate holder having no inclined side surface The corner block with the insert block previously placed in the recess After being disposed by pressing against the side surface of the rudder insert block and movement being restricted by the movement restricting means, a wedge-shaped backup key is press-fitted into a gap between the intermediate holder insert block and the side surface of the concave portion. The holder insert block is disposed while pressing the side surface against the side surface of the intermediate insert block previously disposed, and a wedge-shaped backup key is press-fitted into a gap between two side surfaces of the corner insert block and the concave side surface to press the corner. The insert block and the intermediate holder insert block are brought into close contact with each other. Then, the remaining intermediate insert block having the inclined side surface is disposed between the two corner insert blocks, and a wedge-shaped gap is formed between the intermediate insert block and the concave side surface. Press the backup key in and insert the intermediate insert block. Is brought into close contact with both sides of the corner insert blocks, finally, the manufacturing method of a press mold, characterized in that fixed to the holder base over scan by fixing means each holder insert block. 7. The method for manufacturing a press-molding die according to claim 2, wherein the block manufacturing step and the base manufacturing step are performed in parallel. 8. An upper die and a lower die which are provided so as to be relatively movable in a direction of being separated from each other and approaching each other, and an outer peripheral portion of a panel to be formed which is interposed between the upper die and the lower die together with the upper die. And a holder base capable of gripping, and a method for manufacturing a press-molding mold, comprising:
A block manufacturing process of manufacturing a plurality of insert blocks, and each of the upper die, the lower die, and the holder base,
A base manufacturing step of manufacturing a base; and a block fixing step of positioning and fixing each of the insert blocks to the base, wherein the base manufacturing step is performed by one large machine using the upper die. A base manufacturing process, a base manufacturing process of the lower die, and a base manufacturing process of the holder base are sequentially executed. During the execution of the base manufacturing process, each of the upper die, the lower die, and the holder base is performed. A method for manufacturing a press molding die, wherein the block manufacturing steps are performed in parallel by a small machine.