JPH0428431A - Pressure die for small article - Google Patents

Abstract

PURPOSE:To easily and quickly change a projecting fitting and a recessed fitting corresponding to it through both grasping means by mounting a lower grasping means on a die holder of a press die for small articles and an upper grasping means on a punch holder. CONSTITUTION:The punch holder 2 is held vertically movably by a guide post 4 mounted vertically on the die holder 1 for the press die for small articles, a chuck 6 as the lower grasping means and a chuck 7 as the upper grasping means are fixed respectively by bolts 8. The recessed fitting 14 and the projecting fitting 13 are mounted on both chucks 6, 7 and when the chuck 7 having a spring 17 falls, a stock 21 such as a thin steel sheet, etc., is pressed by the projecting fitting 13 and the recessed fitting 14 set to the chuck 6. When press work is exerted at plural stages, since both fittings 13, 14 are changed easily in a short time by the operation of the jaws 10 of the chucks 6, 7 into fittings corresponding to each stage, operation efficiency is improved.

Description

[Detailed description of the invention] [Industrial application field]

TECHNICAL FIELD The present invention relates to a small mold for press processing that is used by being set in a press machine.

[Prior art]

Conventional small molds for press processing are commercially available die sets (
As shown in the product name), a guide post is installed vertically on the die holder, and a punch holder guided by the guide post is provided so as to be movable near and far with respect to the die holder. , piercing (plain cutting), blanking (shape cutting), homing (shape drawing), jarring (cutting), flanging (bending)
, bending (V-curved edges), trimming (edging), notching (doweling), and restriking (flat-lining)] were directly fixed to convex and concave metal fittings of the desired shape. .

[Problem to be solved by the invention]

Therefore, with this type of small mold for press working, it is necessary to replace the die set described above every three processing steps, and at that time, the Daicera l- is the same as the convex metal fitting and concave metal fitting for each processing classification. Therefore, the die set is heavy and requires a large space to store the die set. The present invention effectively solves the above-mentioned problems, and it is possible to freely attach and detach the convex metal fittings and the concave metal fittings, which are replacement parts, on the side of the gripping means fixed to each of the die holder and punch holder. The purpose is to obtain a mold for two-component small items that can be pressed.

[Means to solve the problem]

Accordingly, the present invention provides a lower gripping means that is formed of a die holder, a guide post, and a punch holder that is guided by the guide post and is movable in a far-rear direction to cut into the die holder, and is fixed to the die holder. and an upper gripping means fixed to the punch holder are disposed facing each other, a small mold for press working in which the guide post is vertically disposed on the die holder side, the gripping means is , a main body, and a plurality of claws that move in the radial direction of the main body;
A small mold for press working, which is composed of a force-applying disk that moves each claw and rotates at the center of the main body;
Provided is a small mold for press working, in which each of the claws has a structure in which a tip end portion of the claw has a tightening slope part,
I hope the above problem has been resolved.

[Effect]

The structure according to the present invention has a lower gripping means fixed to the die holder and a lower gripping means fixed to the punch holder.
On the other hand, the corresponding concave metal fittings can be freely attached and detached.

【Example】

Hereinafter, five specific embodiments of the present invention will be described with reference to the drawings. Fig. 1 is a cutaway side view of a main part of a mold for a small press work according to the present invention, and Fig. 2 is a side view of the mold for a small press work in which a guide post is vertically mounted on the main body of the lower gripping means. , FIG. 3 is a cutaway side view of a main part of a small mold for press work having another gripping means, FIG. 4 is an explanatory view showing the homing process, and FIGS. 5 to 7 are perspective views showing the press work product. It is. The small mold for press working has a punch holder 2 disposed oppositely above the die holder J, and a die holder 1 that is connected to the die holder 1 in one direction via the mounting boss 3, or
Several guide posts 4 are directly installed vertically, and a guide bush 5 that slides up and down while being guided by the guide posts 4 is attached to the punch holder 2. In this case, as shown in FIG.
When the die holder 1 and the punch holder 2 are vertically installed on the main body 9, the die holder 1 and the punch holder 2 can be made smaller. A lower gripping means 6 is provided at each opposing portion of the die holder l and the punch holder 2.
and an upper gripping means 7 having the same shape as this are fixed with fasteners 8 such as bolts. The gripping means 6 and 7 consist of a main body 9, a plurality of guides 119a formed in the radial direction, a plurality of claws io that slide while being guided by the guide guides 119a, and a rotating portion at the center of the main body 9. The jack consists of a force-applying disk 11 that is moved and forcibly moves each pawl 10, and a bevel gear 12 that forcibly rotates the force-applying disk 11. What is shown in the figures and FIG. 2 is a small-diameter chuck that grips the main body 9 by protruding its claws 10 inward in the radial direction. J4 is suitable for gripping objects whose outer diameters are small, and the one shown in FIG. This is a large-diameter chuck that is protruded and gripped, and the large-diameter chuck 6
．． 7 is suitable for gripping the inner diameter portions j, 3a, and 14a of the convex metal fitting 13 and the concave metal fitting 14, each of which has a large outer and inner diameter. , if a tightening inclined portion 10a is provided at each of the outer end portions of the claws 10 on the sides that do not face each other upwardly and downwardly, the tightening inclined portion 10a is provided with an engaging annular portion 15a that engages with the tightening inclined portion 10a.
, 19a are formed inside the inner diameter portions 13a, 14a of the held members 15.19 of the convex metal fittings 13 and the concave metal fittings 14, respectively, and can be tightened in a six-wedge shape. This is effective for closely fixing the mounting flat surface of 7 and the corresponding flat surface of the held member 15, 19, and reliable tightening improves fixation and centering accuracy. The force applying disk 11 has one or several convex spiral teeth 11a, and the convex spiral teeth 11a mesh with the teeth of the pawl 10. In addition, at this time, teeth are missing in the radial direction at a midpoint of the convex spiral teeth 11a over a certain width wider than the width of the claws 10, and the number of interrupted portions, which are the missing teeth, are formed in the same number as the number of claws 10. By forming discontinuous convex spiral teeth 11a, the meshing relationship with the teeth of the pawl 10 can be released at this portion, and the pawl 10 can be freely attached and detached. Further, another means may be provided in place of the force applying disk 11, and the pawl 10 may be forcibly moved in the radial direction. The convex metal fitting 13 attached to one of the gripping means 6, 7 and the concave metal fitting 14 attached to the other have different shapes depending on the processing process, but as shown in FIG. In the case of the metal fitting 13, the upper gripping means 7 grips the convex-shaped held member 15, and the rod-shaped convex-shaped held member 15 is attached to the held member 15 via the spring release member 16, etc., which is elastically pushed downward by the spring 17. 18 supported by the member to be held 15. On the other hand, the corresponding concave metal fitting 14 for the piercing process has a concave type held member 19 held by the lower gripping means 6, and a concave type 20 that allows the lower end portion of the convex type 18 to fit into the upper part of the held member 19. Consists of the attached. As a result, when the punch holder 2 approaches the die holder 1, the lower end of the convex mold 18 is moved against the thin plate material 21 placed between the lower end of the convex mold 18 and the upper end of the concave mold 20. At the same time as it is inserted into the hole at the upper end, a predetermined hole is bored in the thin plate material 21. Furthermore, as shown in FIG. 3, if the convex metal fitting 13 is a convex metal fitting 13 for the piercing process that simultaneously drills multiple holes, the held member 15 for the convex type has a large outer diameter. The inner diameter portions 13a and 14a of the held member 15 are held by the upper large-diameter chuck, which is the upper gripping means 7, and the corresponding concave metal fitting 14 for the piercing process holds the concave held member 19 at the lower portion. A plurality of predetermined holes can be simultaneously drilled in the thin plate material 21 in the manner described above by gripping the lower large-diameter chuck which is the gripping means 6. Next, a specific process example of press working will be explained according to the order of FIGS. A convex metal fitting for the process (not shown) and a concave metal fitting for the planking process (not shown) are held by the upper gripping means 7 and the lower gripping means 6, respectively, and blanking is performed to form the corrugated material 21a. Next, the process moves to a process of drawing the corrugated material 21a into an ashtray shape, a so-called homing process, and as shown in FIG. The convex metal fitting 13 for the homing process shown by the solid line in FIG. 4 and the concave metal fitting 14 for the homing process are replaced and the homing process is performed to form the shape drawing material 21b.Next, a plurality of holes are simultaneously drilled in the shape drawing material 21b. Moving on to the so-called piercing process, the parts held by the upper gripping means 7 and the lower gripping means 6 are replaced with a convex metal fitting for the piercing process (not shown) and a concave metal fitting for the piercing process (not shown), and the piercing process is performed. In this way, a pressed product 21c is formed. In addition, a positioning engagement protrusion 10b is formed on the outer protruding end surface of each claw 10 of the large-diameter chuck 6.7, and the engagement protrusion 10b is connected to the held member of each of the convex metal fitting 13 and the concave metal fitting 14. 15
．． Positioning engagement recesses 15b and 19 formed in 19
b, so that the positioning and removal prevention can be performed at the same time. according to this. This is effective for those without the tightening slope portion 10a.

【Effect of the invention】

In the small mold for press working described above, the lower gripping means 6 is fixed to the die holder 1, and the upper gripping means 7 is fixed to the punch holder 2, so that the desired shape can be formed on one side while leaving each gripping means. Since the convex metal fitting 13 and the concave metal fitting 14 corresponding to the other can be replaced in a short time, work efficiency is improved.Furthermore, this replacement work is easy, so no skill is required, and replacement parts can be easily replaced. Since only the convex metal fittings 13 and the concave metal fittings 14 are used, the replacement parts can be made smaller and lighter than conventional ones, and the storage space can also be reduced. Furthermore, as an exchangeable small mold for press working, it is excellent in terms of accuracy because it can be replaced with a centering accuracy of 10 microns.

[Brief explanation of the drawing]

Fig. 1 is a cutaway side view of the main parts of a mold for small objects for press processing according to the present invention, and Fig. 2 is a side view of the mold for small objects for press processing without turning when the guide post is vertically installed on the main body of the lower gripping means. , Fig. 3 is a cutaway side view of essential parts of a small mold for press processing having other gripping means, Fig. 4 is a first explanatory view showing the homing process, and Fig. 5 is a circular view showing the homing process. FIG. 6 is a perspective view showing a processed product cut out into a board shape, FIG. 6 is a perspective view showing a processed product drawn into an ashtray shape in the homing process, and FIG. 7 is a perspective view showing a processed product punched in a piercing process. . (Symbol) 1...Die holder 2...Punch holder 4.
...Guide post 6...Lower gripping means 7...
- Part gripping means 9...Main body 10...Claw 0a...Tightening inclined part 11...Applying disk

Claims (1)

[Claims] [1] A die holder (1), a guide post (4),
The die holder (1) is guided by the guide post (4).
) Punch holder (2) that can be moved freely near and far
A small article for press processing, which is formed from a lower gripping means (6) fixed to the die holder (1) and an upper gripping means (7) fixed to the punch holder (2), arranged to face each other. Mold. [2] The guide post (4) is connected to the die holder (1)
2. The small mold for press working according to claim 1, which is vertically installed on the side. [3] The gripping means (6) and (7) are connected to the main body (9),
A plurality of claws (10) that move in the radial direction of the main body (9), and a force applying disk (11) that moves each claw (10) and rotates at the center of the main body (9). The small mold for press working according to claim 1, comprising: [4] The mold for press working small articles according to claim 3, wherein each of the claws (10) has a structure in which a tip end portion of the claw (10) is provided with a tightening slope portion (10a).