JPH0760374A - Press - Google Patents

Abstract

PURPOSE:To execute the press forming with precise alignment by providing a plurality of male punches on either of an upper die base and a lower die base, and providing a plurality of female punches on the other die base. CONSTITUTION:A half blow punch (male punch) 22 and a center pierce punch (male punch) 23 are provided on a lower die base 13. A main punch (female punch) 26 and a gear knock-out (female punch) 30 are provided on an upper die base 15. The lower die base 13 is elevated to push a pressing projection 21 a into a sheet 12 to be pressed. The center pierce punch 23 is elevated toward the sheet 12 to blank the center pierce. The punch 23 is advanced into a cutting hole 30b of the gear knock-out 30. The side pierce punch 28 is elevated to form the side pierce. Simultaneously, an inner circumferential gear part is formed by a gear-shaped part 22b of the half-blow punch 22, and an outer circumferential gear part is formed by a cylinder part 26a of the main punch 26. The press forming direction of a pluality of processes is same for the sheet 12, resulting in high precision of the press forming.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a press device for performing concentric press working on a plate material to be processed by a plurality of male punches and female punches provided on a lower die table and an upper die table.

[0002]

2. Description of the Related Art For example, a gear component used in a reclining device of an automobile includes a center pierce punched by a press device and an inner circumference (outer periphery) half-blanked concentrically with the center pierce. ) Some have gears.

As described above, when concentric press working is applied to the same plate material, the conventional press machine
For example, the center piercing punch provided on the upper die base forms the center piercing, and the inner peripheral (outer peripheral) gear part is formed concentrically with the center piercing by the half blow punch provided on the lower die base.

However, in such a conventional press machine, since the processing directions of the two processes to be performed on the same plate material are different, the center piercing and the inner circumference (outer circumference) are different.
There is a problem that misalignment is likely to occur between the gear part and such misaligned gear parts are assembled in the reclining device, which causes a problem such as an increase in torque during operation.

[0005]

SUMMARY OF THE INVENTION The present invention has been made on the basis of the above-mentioned problems associated with a conventional pressing device, and provides a pressing device capable of accurately centering a plate material to be processed which requires concentric pressing. The purpose is to do.

[0006]

SUMMARY OF THE INVENTION According to the present invention for achieving the above object, a plate material to be processed is concentrically pressed by a plurality of male punches and female punches provided on one side and the other side of a lower die table and an upper die table. In the pressing device, the plurality of male punches are provided on one of the lower die table and the upper die table, and the plurality of female punches are provided on the other of the lower die table and the upper die table.

With the above structure, it is possible to provide the pressing apparatus which can perform the centering accurately by making the processing directions of the plurality of steps for the plate material requiring the concentric pressing work the same. it can.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below with reference to illustrated embodiments. FIG. 1 is a front cross-sectional view showing an entire press device 11 to which the present invention is applied. The pressing device 11 is a gear part 40 used for a reclining device of an automobile.
Precise pressing of (Fig. 2) (fine blanking)
It is for doing.

As shown in FIG. 1, the pressing device 11 includes a lower die table 13 (FIG. 5) on which a plate material 12 to be processed is placed, and an elevating part (not shown) with respect to the lower die table 13. It has an upper mold stand 15 (FIG. 4) supported so that it can be raised and lowered.

The lower die table 13 has a die holder 16, and a die plate 17 is fitted in a cylinder portion 16a of the die holder 16 so as to be vertically slidable in the figure. An ejector punch 21 having a pressing protrusion 21a is slidably fitted in the cutting hole 17a of the die plate 17. A half blow punch (male punch) 22 having a gear-like portion 22b on the outer circumference is fitted to the cylinder portion 21b of the ejector punch 21 so as to be slidable in the vertical direction in the figure.

Further, a center piercing punch (male punch) 23 is fitted in the cylinder portion 22a at the center of the half blow punch 22 so as to be slidable in the vertical direction in FIG. These die plate 17 and ejector punch 2
1, the half blow punch 22 and the center piercing punch 23 are the thrust pins 19 and 20 and the thrust pins 19 and 20.
It is floated by a spring or the like fitted to. In addition, 28 is a side pierce 4 which is slidably fitted in a cutting hole 21c formed in the ejector punch 21.
4 (FIG. 2) is a side piercing punch for forming.

The upper die table 15 has a die holder 25, and the die holder 25 has a main punch (female punch) 26 at a position facing the ejector punch 21. The main punch 26 has a cylinder portion 26a whose inner peripheral surface is formed in a gear shape. This cylinder part 26
In a, a gear knockout (female punch) 30 having a gear-shaped outer peripheral surface 30a and a cutting hole 30b is provided. It is fitted so that it can slide. A pad 31 is fitted into the cutting hole 30b of the gear knockout 30 so as to face the center piercing punch 23 while being elastically supported for upward movement by a cushion portion 32.

The pressure plate 29 is supported by the die holder 25 via thrust pins 34 and the like.
The cylinder portion 29a is slidably fitted on the main punch 26. 27 is a side piercing punch 28
It is a pad slidably fitted to the cylinder portion 26b at a position opposed to.

As shown in FIG. 6, the cushion portion 32.
Is located above the pad 31 and has a slag spring rod 33, a slug spring collar 36 and a spring adjust plate 37 provided at the upper and lower ends of the slag spring rod 33, respectively. A large number of disc springs 39 are contracted between the slag spring collar 36 and the spring adjust plate 37, and between the head of the slag rod 35 screwed below the slag spring collar 36 and the spring adjust plate 37. The coil spring 48 is contracted. As a result, the cushion portion 32 is pushed up by the pad 31 when the center piercing punch 23 rises.
5 and the slag spring rod 33 can be raised against the disc spring 39.

The present press device 11 having the above-mentioned configuration is
The lower die stand 13 and the upper die stand 15 are moved toward and away from each other at a predetermined timing, and the center pierce 41,
Inner peripheral gear portion 42, outer peripheral gear 43 and side piercing 44
Etc. can be formed. The process is shown in FIGS.
Will be described in order.

First, the free travel is started in the state shown in FIG. 7, and the respective parts of the lower die table 13 and the upper die table 15 which face the plate material 12 to be processed start contact with the plate material 12 to be processed. Then, as the lower die table 13 is raised, the pressing projections 21a are pushed into the lower surface of the plate material 12 to be processed as shown in FIG. 8, and then the center piercing punch 23 is raised toward the plate material 12 to be processed, The punching of the piercing 41 is started. As a result, the center piercing punch 23 enters the cutting hole 30b of the gear knockout 30, so that the portion corresponding to the center piercing punch 23 and the cutting hole 30b is punched out as shown in FIG.
The center piercing 41 is formed by punching as a. At the same time, the rise of the side piercing punch 28 is started, and thus the forming of the side piercing 44 is started.

Then, as shown in FIG. 10, as the side piercing 44 is formed, the inner peripheral gear portion 42 and the outer peripheral gear portion 4 are formed.
The forming of No. 3 is also started, and further, the lowering of the entire main punch 26 starts the cutting of the outer peripheral frame of the gear component 40 with respect to the plate material 12 to be processed.

Further, when the outer peripheral frame of the gear component 40 is cut, the half blow punch 22 starts to move up with respect to the cylinder portion 26a, and the gear component 40 has an inner peripheral gear by the gear-like portion 22b of the half blow punch 22. The portion 42 is formed, and at the same time, the outer peripheral gear portion 4 is formed by the cylinder portion 26a.
3 is formed. In this case, since the half blow punch 22 and the center piercing punch 23 are assembled together on the lower die table 13, and the main punch 26 and the gear knockout 30 are assembled together on the upper die table 15, concentric press working is performed. The required processing directions of the plurality of steps for the plate material 12 to be processed are the same. Therefore, the half blow punch 22 and the center piercing punch 23 can be actuated in the same direction for punching, and the inner peripheral gear portion 42 and the outer peripheral gear portion 43 can be accurately centered with respect to the center piercing 41. It is possible to guarantee the high quality required for a certain gear component 40, and it is possible to avoid the occurrence of misalignment even when the mold component is updated. As a result, the center misalignment of the inner peripheral gear portion 42, the outer peripheral gear portion 43 and the center piercing 41 can be processed to be, for example, 0.05 or less.

As shown in FIG. 11, the pressing device 11 further ends the fine blanking when the ram (not shown) rises to the top dead center. And FIG.
As shown in FIG. 13, the knockout of the gear component 40 is finished, and as shown in FIG. 13, the knockout of the punched material 12a from the center pierce 41 is finished. After that, the lower mold base 13 is unlocked, and the upper mold base 15 is released.
To start the strip.

[0020]

As described above, according to the present press device,
Since a plurality of male punches are provided on one of the lower die table and the upper die table, and a plurality of female punches are provided on the other of the lower die table and the upper die table, a plurality of steps for the plate material to be processed that require concentric pressing It is possible to provide the press device capable of performing the centering accurately, by making the processing directions of the same.

[Brief description of drawings]

FIG. 1 is a front sectional view showing an entire press device to which the present invention is applied.

FIG. 2 is an enlarged view showing a single shape of a gear component that is a stamped material.

FIG. 3 is a side sectional view showing a single shape of a gear component that is a stamped material.

FIG. 4 is a bottom view showing the upper mold base.

FIG. 5 is a plan view showing a lower mold base.

FIG. 6 is a cross-sectional view showing a cushion pin that elastically supports a pad and its periphery.

FIG. 7 is a cross-sectional view of essential parts showing a state at the start of punching processing by the entire pressing apparatus to which the present invention has been applied.

FIG. 8 is a cross-sectional view of essential parts showing a state when the lower mold stand float is started by the entire pressing apparatus.

FIG. 9 is a cross-sectional view of the main parts showing a state at the end of the lower mold table float by the entire pressing apparatus.

FIG. 10 is a cross-sectional view of essential parts showing a state of a half blow punch at the end of the float by the entire pressing apparatus.

FIG. 11 is a cross-sectional view of the main parts showing the state of the ram at the top dead center in the entire pressing apparatus.

FIG. 12 is a cross-sectional view of essential parts showing a state at the end of knockout of gear parts by the entire pressing apparatus.

FIG. 13 is a cross-sectional view of essential parts showing a state at the end of knockout of the center pierce by the entire pressing device.

[Explanation of symbols]

 11 Press Device 12 Work Plate Material 13 Lower Mold Stand 15 Upper Mold Stand 16 Die Holder 17 Die Plate 19 20 Thrust Pin 21 Ejector Punch 21a Pressing Protrusion 22 Half Blow Punch 23 Center Piercing Punch 25 Die Holder 26 Main Punch 27 31 Pad 28 28 Side Piercing Punch 29 Pressure Plate 30 Gear Knockout 32 Cushion Part 33 Slug Spring Rod 34 Thrust Pin 35 Slug Rod 36 Slug Spring Collar 37 Spring Adjust Plate 39 Disc Spring 40 Gear Parts 41 Center Pierce 42 Inner Gear 43 43 Outer Gear 44 Side Pierce

Claims (2)

[Claims] 1. A press device for performing concentric press working on a plate material by a plurality of male punches and female punches provided on one side and the other side of a lower die table and an upper die table, wherein the plurality of male punches are provided. Is provided on one of the lower die table and the upper die table, and the plurality of female punches are provided on the other of the lower die table and the upper die table. 2. The plurality of male punches according to claim 1,
A press device which is a center piercing punch for forming a center piercing on a plate material to be processed and a half blow punch for forming an inner peripheral gear portion concentric with the center piercing by half blanking.