JP2001179355A - Stamping facility - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a material to be processed from coming in contantact with a heating system. SOLUTION: A stamping facility characterized by installing a heating system 14 equipped with a heating furnece 17 which heats a successive platen material 11 to be processed, a press instrument 18 which stamps an aforementioned material 11 to be processed, and an elevating measure 7 for making an aforesaid heating furnace 17 go up and down by interlocking with a lifting movement of an afforementioned material 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a punching apparatus.

[0002]

2. Description of the Related Art A blanking process for manufacturing a product or a semi-finished product by punching a plate-like material into a required shape is a manufacturing method capable of manufacturing a product continuously.

As prior art 1, Japanese Patent Application Laid-Open No. 9-27492
No. 6, the disk-shaped thin sheet material is formed by forging,
A method of manufacturing a gear by punching the thin plate material by a fine blanking method is disclosed.

[0004]

The fine blanking method is desirably performed by heating a workpiece before punching. The prior art 1 describes that there is a case where hot or warm working is performed depending on the material of the material.

[0005] However, the prior art 1 does not disclose how to perform hot or warm working. The present inventor has disclosed in Japanese Patent Application No. 10-204142,
We have invented a punching method for continuously punching a workpiece after heating it. However, since the workpiece moves up and down during the punching process, there is a problem that the workpiece contacts the heating furnace.

The present invention has solved the above-mentioned problems, and provides a punching apparatus capable of preventing a workpiece from coming into contact with a heating furnace.

[0007]

Means for Solving the Problems In order to solve the above technical problems, the technical means (hereinafter referred to as the first technical means) taken in claim 1 of the present invention is a continuous plate-like. A heating device having a heating furnace for heating the work material, and a press device for punching the work material are provided,
A punching apparatus is provided with a heating furnace elevating means for raising and lowering the heating furnace in conjunction with the vertical movement of the workpiece.

The effects of the first technical means are as follows.

That is, since the heating furnace can be moved up and down in conjunction with the vertical movement of the workpiece by the heating furnace elevating means, the workpiece can be prevented from contacting the heating furnace, and the heating furnace can be deformed. Can be prevented from being short-circuited.

In order to solve the above-mentioned technical problem, the technical means (hereinafter referred to as the second technical means) taken in claim 2 of the present invention is that the heating furnace elevating means includes the pressing device 2. The punching apparatus according to claim 1, wherein the lower mold is configured to move the heating furnace up and down in conjunction with a lower ram of the press device after the lower mold contacts the workpiece. .

The effects of the second technical means are as follows.

That is, the heating furnace elevating means moves up and down in conjunction with the lower ram of the press device, and at the same time, the heating furnace can be moved up and down in conjunction with the vertical movement of the workpiece.
Even if the operation in the cycle is not constant speed or the operation timing of the press device and the workpiece is shifted, the heating furnace and the workpiece can be moved up and down in synchronization. Further, even if the speed of one cycle operation of the press device changes, the heating furnace and the workpiece can be moved up and down in synchronization without adjustment.

[0013] In order to solve the above-mentioned technical problem, the technical means (hereinafter referred to as third technical means) taken in claim 3 of the present invention is that the heating furnace elevating means includes a pressing device of the press device. An elevating member erected on the lower ram, wherein the elevating member is capable of abutting on a contact portion provided on any one of the heating furnace and a member connected to the heating furnace. The space between the elevating member and the contact portion when not in contact with the contact portion is equal to the space between the lower die upper surface of the press device and the workpiece. It is a punching device.

The effects of the third technical means are as follows.

That is, when the elevating member is not in contact with the abutting portion, the distance between the elevating member and the abutting portion is equal to the distance between the upper surface of the lower die of the press device and the workpiece, so that heating can be performed with a simple structure. The furnace can be raised and lowered reliably in conjunction with the workpiece, and a small and low-cost heating furnace lifting means can be provided.

In order to solve the above-mentioned technical problem, the technical means (hereinafter referred to as fourth technical means) taken in claim 4 of the present invention is provided between the heating furnace and the workpiece supply side. 2. The punching apparatus according to claim 1, further comprising a heating furnace contact preventing means for preventing the workpiece from contacting the heating furnace.

The effects of the fourth technical means are as follows.

That is, the heating furnace contact preventing means can prevent the workpiece on the workpiece supply side from the heating furnace from coming into contact with the heating furnace, thereby preventing the heating furnace from being deformed or short-circuited. Also, since the heating furnace elevating means and the heating furnace contact preventing means can cooperate to keep the workpiece in the heating furnace horizontal, the workpiece 11 in the heating coil portion 17 can be maintained.
Since the space through which the heat passes can be reduced, the heating can be efficiently performed and the heating coil unit 17 can be reduced in size.

In order to solve the above technical problem, the technical means (hereinafter referred to as the fifth technical means) taken in claim 5 of the present invention is that the heating furnace contact preventing means is provided by the pressing device. A contact prevention member erected on the lower ram, and when the contact prevention member is not in contact with the workpiece, the distance between the contact prevention member and the workpiece is lower than the lower die of the press device. 5. The punching apparatus according to claim 4, wherein the distance is equal to a distance between an upper surface and the workpiece.

The effects of the fifth technical means are as follows.

That is, when the contact preventing member is not in contact with the workpiece, the distance between the contact preventing member and the workpiece is
Since it is equal to the distance between the upper surface of the lower die of the press device and the workpiece,
It is possible to prevent the workpiece from contacting the heating furnace with a simple structure, and to provide a small and low-cost heating furnace contact preventing means.

In order to solve the above-mentioned technical problems, the technical means (hereinafter referred to as sixth technical means) taken in claim 6 of the present invention is characterized in that at the time of punching the workpiece, 2. A bouncing prevention means for preventing a workpiece from bouncing up is provided.
It is a punching apparatus described in the above.

The effects of the sixth technical means are as follows.

That is, the work-up material can be prevented from jumping up by the jump-up preventing means, so that the work material can be prevented from contacting the heating furnace, and the heating furnace can be prevented from being deformed or short-circuited.

In order to solve the above-mentioned technical problem, the technical means (hereinafter referred to as a seventh technical means) taken in claim 7 of the present invention is characterized in that the jump-up preventing means comprises:
A press-up member that is provided with a vertically movable workpiece contact portion and that is suspended from an upper ram of the press device, and is capable of sandwiching the workpiece with the contact prevention member. Item 6. A punching apparatus according to Item 6.

The effects of the seventh technical means are as follows.

That is, since the workpiece can be sandwiched between the splash prevention member and the contact prevention member during the punching process, the workpiece can be prevented from jumping with a simple structure.

In order to solve the above-mentioned technical problem, a technical means (hereinafter referred to as an eighth technical means) taken in claim 8 of the present invention is that the heating device is a high-frequency heating device. The punching apparatus according to claim 1, wherein:

The effects of the eighth technical means are as follows.

That is, Since the high-frequency heating device can heat rapidly, the feed speed of the continuous workpiece can be increased,
Productivity is improved. Further, since the heating furnace is formed in a coil shape, the high-frequency heating device can be designed freely according to the cross-sectional shape of the workpiece and can be reduced in size.

[0031]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described.
Description will be given based on the drawings. FIG. 1 is an explanatory diagram for explaining the operation of the fine blanking press process according to the embodiment.
The fine blanking press is a processing method for precision punching, and this step is a step of progressively pressing a continuous workpiece. The present embodiment is a process for manufacturing a pole parking lock of an automatic transmission for an automobile. However, the present invention is not particularly limited to the manufacture of this product, and various products such as a seat reclining gear and a flange brake can be manufactured.

The workpiece 11 is a continuous plate-shaped metal steel sheet, which is set in a state wound around the uncoiler 12. By passing the workpiece 11 set on the uncoiler 12 through the level feeder 13, the workpiece 11 set on the uncoiler 12 is wound. The workpiece 11 having passed through the level feeder 13 is supplied to a press device 18 for punching.

A press die 19 for fine blanking is set in the press device 18. Press equipment 1
8 is provided with a high-frequency heating device 14. The high-frequency heating device 14 includes a power supply unit 15, an oscillating unit 16 that oscillates a current from the power supply unit 15, and a heating coil unit 17 that is a heating furnace that heats a workpiece by high-frequency current output from the oscillating unit 16. Have been. The heating coil unit 17 is provided with a frame 18 of a press device 18 on which a press die 19 is installed.
A is provided on the supply side of the work material 11 from the press mold 19 in a. The power supply unit 15 and the oscillating unit 16 are provided outside the frame 18a, and the oscillating unit 16 and the heating coil unit 17 are connected by a high-voltage output lead wire 21.

The workpiece 11 supplied to the pressing device 18
Pass through the heating coil unit 17. At this time, when a high-frequency current is applied to the heating coil section 17, the workpiece 11 is rapidly heated by the electromagnetic induction action, and the workpiece 11 is heated from normal temperature to a warm working temperature (about 600 to 700 ° C.) in about 5 seconds. Reach The heated workpiece 11 is immediately sent into the press die 19.

The work material 11 may be a sheet metal metal sheet cut to a fixed size. In this embodiment, a high-frequency heating device is used as the heating device. However, the heating device is not particularly limited, and any heating device that can heat a continuous workpiece can be used. Since the high frequency heating device can heat rapidly,
The feed speed of the continuous workpiece can be increased, and the productivity is improved. Moreover, since the heating furnace is formed of a coil, the high-frequency heating device can be designed freely according to the cross-sectional shape of the workpiece and can be reduced in size.

FIG. 2 is an explanatory view for explaining the operation of the press apparatus of the present embodiment, and is shown in a partial sectional view. The press device 18 is provided with an upper ram 1b and a lower ram 1c. The press die 19 includes an upper press die 2 and a lower press die 3, the upper press die 2 being fixed to the upper ram 1b, and the lower press die 3 being fixed to the lower ram 1c.

The upper press die 2 includes a punch 2b, a stripper 2c serving as a guide for the punch, a workpiece guide 2a for guiding the workpiece 11, and an upper for fixing the press upper die 2 to the upper ram 1b. A holder 2d is provided. The punch 2b is fixed to the upper holder 2d. The stripper 2c is slidable with the punch 2b,
Upper holder 2d with stripper bolt not shown
Is linked to Workpiece guide 2a is stripper 2
The workpiece 11 is fixed to an end of the workpiece c.

The press lower die 3 is provided with a die 3b, a knockout 3a for pushing out the punched product from the die 3b after the punching is completed, and a lower holder 3c for fixing the press lower die 3 to the lower ram 1c. . The die 3b is fixed to the lower holder 3c. Knockout 3a is connected to a knockout member (not shown) so as to be slidable with die 3b.

A heating coil section 17 is provided on the side of the press die 19 on which the workpiece 11 is supplied. The heating coil unit 17
Since it is formed of a tubular copper coil, it has less strength than the workpiece 11 and is easily deformed. Further, since the heating efficiency increases as the distance from the workpiece decreases, the copper coil is not coated to improve the heating efficiency. Therefore, when the workpiece 11 comes into contact, a short circuit occurs.

The heating coil section 17 is connected to the output transformer section 8 provided outside the frame 18a by the coil lead 4 made of copper. The coil lead 4 guides a high-frequency current to the heating coil section 17 and holds the heating coil section 17, and has rigidity. The output transformer section 8 is slidably held by an L-shaped output transformer section holding angle 9 fixed to the frame 18a.

A heating coil lower contact prevention stand (contact prevention member) 5 serving as a heating furnace contact prevention means is provided upright on the lower ram 1c. This heating coil lower contact prevention stand 5
Is provided on the supply side of the workpiece 11 from the heating coil section 17 and below the workpiece 11. The heating coil lower contact prevention stand 5 and the workpiece 11 when the heating coil lower contact prevention stand 5 is not in contact with the workpiece 11.
Is configured to be equal to the distance between the upper surface of the lower mold 3 and the workpiece 11. Here, the fact that the two intervals are equal means that, apart from the complete coincidence, a certain degree of difference is allowed depending on the distance between the coil and the workpiece in the heating coil unit 17.

The heating coil lower contact prevention stand 5
The distance between the workpiece 11 and the workpiece 11 is the distance between the upper surface of the lower contact prevention stand 5 and the lower surface of the workpiece 11. On the other hand, the distance between the upper surface of the lower die 3 and the workpiece 11 is the distance between the upper surface of the die 3 b of the lower die 3 and the lower surface of the workpiece 11.

The heating coil upper contact prevention stand (bounce prevention member) 6 serving as a bounce prevention means is connected to the upper ram 1.
b. The heating coil upper contact prevention stand 6 is provided on the supply side of the workpiece 11 from the heating coil portion 17 and above the workpiece 11 so as to face the heating coil lower contact prevention stand 5 with the workpiece 11 interposed therebetween. Have been. That is, the heating coil upper contact prevention stand 6
Is the workpiece 1 with the heating coil lower contact prevention stand 5.
1 is provided so as to be sandwiched.

FIG. 3 shows a heating coil upper contact prevention stand 6.
FIG. The heating coil upper contact prevention stand 6 includes a base 6a and a workpiece contact portion 6b provided below the base 6a and capable of contacting the workpiece 11. The workpiece contact portion 6b is vertically movable, and is urged toward the workpiece 11 by a spring 6c provided inside the base 6a. The spring 6c is held down by a screw plug 6d. The base 6a is connected to the upper ram 1 by bolts 6e.
b.

An elevating L angle (elevating member) 7, which is a heating furnace elevating means capable of elevating the output transformer section 8 from the heating coil lower contact prevention stand 5 to the lower ram 1c on the supply side of the workpiece 11, is provided. ing. The arm portion 7a of the lifting L-angle 7 extends to the outside of the frame 18a, and is capable of abutting on a contact portion 8a provided below the output transformer portion 8. A bake material which is not subjected to induction heating is used for the contact portion 8a.

The elevating L angle 7 includes an output transformer unit 8
Heating furnace elevating means for raising and lowering the heating coil unit 17 via the coil lead 4. Elevating L angle 7 is abutting part 8a
Up and down L-angle 7 and contact part 8 when not in contact with
The interval a is configured to be equal to the interval between the upper surface of the lower mold 3 and the workpiece 11. Here, the fact that the two intervals are equal means that the heating coil unit 17
A certain degree of difference is allowed depending on the distance of the coil from the workpiece to the inside of the workpiece.

The distance between the up-and-down L-angle 7 and the contact portion 8a is defined by the upper surface of the arm 7a of the up-and-down L-angle 7 and the contact portion 8a.
a is the distance between the lower surfaces. On the other hand, the distance between the upper surface of the lower die 3 and the workpiece 11 is the distance between the upper surface of the die 3 b of the lower die 3 and the lower surface of the workpiece 11. Further, in this embodiment, the lifting L-angle 7 is configured to be able to abut on the abutting portion of the output transformer unit 8 which is a member connected to the heating coil unit 17, but is provided on the heating coil unit 17 itself. You may comprise so that a contact part may be contacted.

FIG. 2A is an explanatory view showing a state of the original position before the pressing operation in which the lower ram is at the bottom dead center. FIG.
(B) is an explanatory view showing a state at the moment when the die contacts the workpiece. FIG. 2C is an explanatory diagram showing a state in which the lower ram is at the top dead center position where the lifting is completed. FIG.
(D) is an explanatory view showing a state at the moment when the lower ram descends and the heating coil upper contact prevention stand separates from the workpiece.

The operation of the punching process will be described. FIG.
From the state of (a), the lower ram 1c starts to rise, and the die 3b comes into contact with the workpiece 11 to be in the state of FIG. 2 (b). Heating coil lower contact prevention stand 5 is workpiece 11
The gap between the heating coil lower contact prevention stand 5 and the workpiece 11 when the die 3b is not in contact with the workpiece 11 is equal to the distance between the upper surface of the lower die 3 and the workpiece 11.
The contact prevention stand 5 under the heating coil
Contacts the workpiece 11. At the same time, the elevation L angle 7
Is not in contact with the contact portion 8a, the distance between the elevating / lowering L angle 7 and the contact portion 8a is determined by the distance between the upper surface of the lower mold 3 and the workpiece 11
At the moment when the die 3b comes into contact with the workpiece 11, the arm 7a of the vertical L-angle 7 comes into contact with the contact portion 8a of the output transformer 8.

Further, the lower ram 1c is raised, and the workpiece 11
Moves upward in a form that can be lifted by the die 3b. The heating coil lower contact prevention stand 5 erected on the lower ram 1c is the same distance as the lifting distance.
1 and the elevating L which is erected on the lower ram 1c.
The arm 7a of the angle 7 raises the output transformer 8 so that the heating coil 17
Lift. The coil lead 4 has such a rigidity that the positional relationship between the output transformer section 8 and the heating coil section 17 does not change. Thereby, it is possible to prevent the workpiece 11 from contacting the heating coil of the heating coil unit 17 and prevent the heating coil from being deformed or short-circuited.

Prevention of contact of the workpiece 11 with the heating coil 17 can be realized by moving the heating coil 17 up and down in conjunction with the up and down movement of the workpiece 11 by the elevation L angle 7. However, since the work material on the work material supply side of the heating coil portion 17 is lifted by the heating coil lower contact prevention stand 5 by the same amount as the die 3b lifts the work material 11, the work material 11 Thus, the workpiece can be reliably prevented from contacting with the heating coil portion 17. Therefore, the space through which the workpiece 11 passes in the heating coil unit 17 can be reduced, and the heating coil unit 1
7 can be reduced in size.

When the lower ram 1c is further raised, the workpiece 11 contacts the workpiece contact portion 6b of the heating coil upper contact prevention stand 6 and the heating coil lower contact prevention stand 5b.
Then, the workpiece 11 is sandwiched between the workpiece abutting portions 6b. When the lower ram 1c further rises, the workpiece 1 is held by the heating coil lower contact prevention stand 5 and the workpiece abutting portion 6b.
While holding the workpiece 1, the workpiece contact portion 6b is
Ascend against c.

In this state, the lower ram 1c completes ascending and reaches the state of the top dead center in FIG. 2 (c). In this process,
The workpiece 11 is punched by a punch 2a and a die 3b,
A product 20 is formed. During the punching process, a force is exerted on the workpiece 11 to jump up. However, the workpiece 11 is held between the heating coil lower contact prevention stand 5 and the workpiece contact part 6b on the supply side of the workpiece 11 of the heating coil unit 17. Therefore, the workpiece 11 can be prevented from jumping up. Thereby, it is possible to prevent the workpiece 11 from contacting the heating coil of the heating coil unit 17 and prevent the heating coil from being deformed or short-circuited.

Thereafter, the lower ram 1c descends, and as shown in FIG.
Up to the heating coil upper contact prevention stand 6
Is in contact with Thereby, the vibration of the workpiece 11 applied to the workpiece 11 during the punching process can be suppressed. When the lower ram 1c further descends, the heating coil upper contact prevention stand 6 separates from the workpiece 11 and the workpiece 11 is held by the workpiece guide 2a and stops descending, but stands up on the lower ram 1c. The heating coil lower contact prevention stand 5 and the arm 7a of the elevating L angle 7 are separated from the workpiece 11 and the contact portion 8a, respectively.

Thereafter, the lower ram 1c returns to the position shown in FIG. 2A, and the product 20 is pushed out of the die 3b by the knockout 3a, and is conveyed to the outside of the press die 19. Subsequently, the workpiece 11 is heated by the heating coil portion 17 at the time of punching.
Is heated until it reaches below the punch 2b, and returns to the state shown in FIG. In order to use the workpiece 11 efficiently and to prevent the processed part of the workpiece 11 from cooling, the distance between the press die 19 and the heating coil unit 17 is preferably short. The part 17 is provided in the frame 18a of the press device 18.

In this embodiment, the heating furnace can be moved up and down by the elevating member provided on the lower ram. However, the heating furnace can be moved up and down by using a drive device such as a limit switch cylinder. Good. In this case, a signal that is linked to the movement of the press device is sent to the drive device to control the elevation of the heating furnace. However, since the punching operation is not constant speed, and the operation timing of the press device and the workpiece is different, control becomes complicated and adjustment is difficult.

According to the configuration of the present embodiment, one of the pressing devices
Even if the operation in the cycle is not constant speed or the operation timing of the press device and the workpiece is shifted, the heating furnace and the workpiece can be easily moved up and down in synchronization. Further, even if the speed of one cycle operation of the press device changes, the heating furnace and the workpiece can be moved up and down in synchronization without adjustment.

[0058]

As described above, the present invention is provided with a heating device provided with a heating furnace for heating a continuous plate-shaped workpiece, and a press device for punching the workpiece. Since the punching apparatus is provided with heating furnace elevating means for moving the heating furnace up and down in conjunction with the vertical movement of the workpiece, the workpiece can be prevented from contacting the heating apparatus.

[Brief description of the drawings]

FIG. 1 is an explanatory view for explaining the operation of a fine blanking press step of an embodiment.

FIGS. 2A and 2B are explanatory diagrams illustrating the operation of the press device of the present embodiment. FIG. 2A is an explanatory diagram illustrating a state of an original position before a press operation in which a lower ram is at a bottom dead center, and FIG. ) Is an explanatory diagram showing the state at the moment when the die contacts the workpiece, FIG. 2C is an explanatory diagram showing the state where the lower ram is at the top dead center position where the ascending is completed, and FIG. 2D is the lower diagram. It is explanatory drawing which shows the state at the moment when a ram falls and a heating coil upper contact prevention stand separates from a workpiece.

FIG. 3 is a sectional view of a heating coil upper contact prevention stand.

[Explanation of symbols]

1b: Upper ram 1c: Lower ram 3: Lower mold 5: Heat coil lower contact prevention stand (contact prevention member,
6: heating coil upper contact prevention stand (bounce prevention member, bounce prevention device) 6b: workpiece contact portion 7: elevating L angle (elevating member, heating furnace elevating device) 8: output transformer portion (member) 8a: contact portion 11: workpiece 14: high-frequency heating device (heating device) 17: heating coil portion (heating furnace) 18: press device

Claims (8)

[Claims] 1. A heating device having a heating furnace for heating a continuous plate-shaped workpiece, and a press device for punching the workpiece, which are interlocked with the vertical movement of the workpiece. A punching apparatus, further comprising a heating furnace elevating means for raising and lowering the heating furnace. 2. The heating furnace elevating means is configured to move the heating furnace up and down in conjunction with a lower ram of the pressing device after a lower mold of the pressing device abuts on the workpiece. The punching apparatus according to claim 1, wherein: 3. The heating furnace raising / lowering means is a lifting / lowering member erected on a lower ram of the press device, and the lifting / lowering member is provided on one of the heating furnace and a member connected to the heating furnace. When the elevating member is not in contact with the abutting portion, the interval between the elevating member and the abutting portion is equal to the distance between the lower die upper surface of the pressing device and the work piece. 3. The punching apparatus according to claim 2, wherein the distance is equal to the interval between the materials. 4. A heating furnace contact preventing means for preventing the workpiece from coming into contact with the heating furnace is provided on the workpiece supply side of the heating furnace. Punching equipment. 5. The contact preventing member, wherein the heating furnace contact preventing means is a contact preventing member erected on a lower ram of the press device, and wherein the contact preventing member is not in contact with the workpiece. 5. The punching apparatus according to claim 4, wherein a distance between the workpiece and the workpiece is equal to a distance between a lower die upper surface of the press device and the workpiece. 6. The punching apparatus according to claim 1, further comprising a jump-up preventing means for preventing the workpiece from jumping up when the workpiece is punched. 7. The bouncing prevention means includes a workpiece abutting portion that can move up and down, and is a bouncing preventing member vertically provided on an upper ram of the press device. 7. The punching device according to claim 6, wherein the punching device can be held. 8. The punching device according to claim 1, wherein the heating device is a high-frequency heating device.