JP2001121218A - Die apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a die capable of holding a state that the axial centers of upper/lower dies are aligned even when the upper/lower dies are separated without an interposing object of a guide pin, etc. SOLUTION: In the die apparatus arranged with a die holder 13 fixing a die 11, a punch holder 17 holding a punch 15 to conduct working of a work in cooperation with the die 11 and a striper plate 23 freely pressing/fixing the work to the die 11 in working the work, plural positioning pins 41, each of which both the ends are freely engaged/disengaged with/from a positioning hole 39 arranged in the stripper plate 23 and a positioning hole 37 arranged in the die holder 13, are arranged, further, plural guide pins 33 are arranged between the punch holder 17 and the stripper plate 23 in order to always hold the axial center positions of the striper plate 23 and the punch 15 constant.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold apparatus used by being mounted on a punch press, and more particularly, to a mold apparatus in which an upper mold and a lower mold are completely separated. The present invention also relates to a die apparatus capable of performing press working of a plate-like work while maintaining the axes of a punch provided in an upper die and a die provided in a lower die in alignment.

[0002]

2. Description of the Related Art For example, a die for punching a very thin plate-like work such as a flexible lead frame or a flexible substrate with high precision needs to always accurately maintain a clearance between a punch and a die. Yes,
In some cases, it may be maintained at zero clearance.

[0003] Therefore, a die set having a configuration in which the upper die is guided by a plurality of guide pins in order to always maintain the positional relationship between the upper die and the lower die with high precision as a die for performing higher precision processing. Also, there is a punch unit or the like in which a punch is provided at a tip of an upper arm in a U-shaped holder, and a die facing the punch is provided at a tip of a lower arm.

[0004]

In the die set, since the vertical movement of the upper die is guided by a plurality of guide pins, a relatively large work is moved between the upper and lower dies by the X-axis and the Y-axis. When a workpiece is machined by moving in the direction and positioning, there is a problem that the workpiece may interfere with a guide pin and a relatively large workpiece cannot be machined. There is a similar problem in the punch unit.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has a die holder having a fixed die and a punch holder having a punch for working a work in cooperation with the die. In a mold apparatus comprising a stripper plate capable of pressing and fixing a work to the die during processing of the work, both ends of a positioning hole provided in the stripper plate and a positioning hole provided in the die holder are provided. A plurality of alignment pins that can be disengaged and disengaged are provided, and a plurality of guide pins are provided between the punch holder and the stripper plate in order to always keep the axis position of the stripper plate and the punch constant. Configuration.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 1, a mold apparatus 1 according to an embodiment of the present invention comprises an upper mold 3 and a lower mold 5, and the lower mold 5 is provided with a plurality of lock pins 7. (See FIG. 2) and a die holder 13 in which the die 11 is integrally fixed to the upper surface by mounting bolts 9.

The upper die 3 is provided with a punch 15 for punching a plate-like work (not shown) in cooperation with the die 11. The punch 15 is held by a punch holder 17 and is fixed by a backing plate 21 integrally mounted on the upper surface of the punch holder 17 by a plurality of mounting bolts or the like (not shown).

[0008] A stripper plate 23 is provided for pressing and fixing the work to the upper surface of the die 11 when the work is punched by the cooperation of the punch 15 and the die 11.

More specifically, the stripper plate 23 is integrally fixed to a lower surface of a plate holder 29 by a plurality of lock pins 25 (see FIG. 3) and mounting bolts 27. And the stripper plate 23
The clearance between the guide hole 23H and the punch blade portion 15B of the punch 15 is formed as an extremely small clearance such as, for example, zero clearance.

The above punch 15 and stripper plate 2
In order to perform accurate movement without causing galling or the like between the two during the relative movement with the stripper 3, and to always keep the axis position of the stripper plate 23 and the punch 15 constant. Guide pins 33 slidably fitted to guide bushes 31 (see FIG. 2) provided at a plurality of locations of the plate holder 29 are provided at a plurality of locations of the punch holder 17. Further, the punch holder 1
At a plurality of positions between the plate 7 and the plate holder 29, a stripper spring 35 made of an elastic member is elastically mounted to urge the stripper plate 23 in a downward direction. It is regulated by a plurality of stripper bolts 36.

The punch 1 in the upper die 3 having the above configuration
5, in order to keep the axis of the guide hole 23H of the stripper plate 23 and the axis of the die 11 in the lower die 5 in alignment, a guide bush 37 as an alignment hole provided at a plurality of positions of the die holder 13. Guide bushes 39 are provided at a plurality of locations on the plate holder 29 so as to face up and down. A guide pin 41 is provided as a plurality of positioning pins, the upper and lower ends of which are detachably fitted to the guide bushes 39 and 37 as positioning holes. The guide pin 41 is removed from between the upper and lower dies 3 and 5 when the work is processed.

Although the case where the guide bush 39 as an alignment hole is provided in the plate holder 29 has been exemplified, the stripper plate 23 and the plate holder 29 are provided.
Are integrated, the guide bush 39 may be provided on the stripper plate 23. That is, since both are integrated, the plate holder 29 can be regarded as a stripper plate.

By the way, in a punch press for processing a work using a mold having the above-described configuration, a plate-like work supported on a work table is moved in the X-axis and Y-axis directions in the same manner as a normal punch press. A ram 4 that is provided with a work movement positioning device that can move and position freely, and that can move up and down.
3 is provided. The ram 43 is provided so as to be vertically movable while being guided by a guide portion 45 provided on a frame of the punch press, and the vertical movement of the ram 43 is caused by the operation of an appropriate actuator 47 such as a hydraulic cylinder or a servomotor. It is done by.

The ram 43 has the plate holder 2
9 is provided, and a striker 5 for lowering the punch 15 is provided.
1 is vertically movable. The above clamping device 49
In a normal press, in a configuration in which the die set is automatically attached and detached by an automatic die changing device, the upper die in the die set is provided so as to be horizontally movable similarly to a clamp device capable of fixing the hydraulic pressure. Since this is a known configuration including a clamp jaw that swings up and down by a mechanism, a detailed description of the clamp device 49 will be omitted.

The striker 51 is moved up and down by, for example, a fluid pressure cylinder or the like provided in the ram 43. A configuration in which the striker is vertically movable within the ram is known. Will not be described. Further, the configuration in which the lower die 5 is detachably fixed to the lower frame (bolster) 53 in the punch press uses a clamp device similar to the clamp device 49, and this type of configuration uses a bolster in the press. It is well known as a configuration for fixing the lower die to the user, and the illustration and description of the details are omitted.

Now, the upper die 3 and the lower die 5 having the above-described structure are used.
In the normal state, the upper and lower ends of the plurality of guide pins 41 are fitted to the upper and lower guide bushes 39 and 37, respectively, and the axis of the punch 15 and the axis of the die 11 are in a state of being aligned. . The mounting and dismounting of the die with respect to the punch press is automatically performed by an automatic die changing device with the guide pins 41 provided.

More specifically, when the mold is carried into and positioned on the lower frame 53 by the automatic mold exchanging device, the ram 43 is lowered so as to abut the upper mold 3, and thereafter, the upper mold is moved by the clamp device. 3 plate holder 29
Is fixed, and the die holder 13 is
Are fixed to the lower frame 53. Thereafter, the ram 43 is raised and the plurality of guide pins 41 are removed from between the upper and lower molds 3 and 5.

As a configuration for removing the guide pin 41, an appropriate manipulator can be employed. For example, as shown in FIG. 1, the guide pin 41 is engaged with a locking recess 41C formed at the lower end of the guide pin 41. A piston rod 55 having a locking portion 53 at its distal end, which can be detached and opened so as to open so as to open the collet chuck, is provided with a piston rod 55 which can move up and down. The locking portion 53 is provided in the locking recess 41C. In the expanded state by engagement, the piston rod 55 is moved up and down by the fluid pressure cylinder 57, and the guide pin 41 is moved up and down with respect to the lower frame 53, and the die 1 is moved.
It is also possible to adopt a configuration in which it protrudes and retracts from the upper surface of the first.

As can be understood, the upper die 3 is fixed to the lower surface of the ram 43 and the lower die 5 is fixed to the lower die 5 in a state where the upper die 3 and the lower die 5 are centered by the plurality of guide pins 41. Since the guide pins 41 are removed after being fixed on the frame 53, the axes of the upper and lower molds 3 and 5 are kept in the same state, and the clearance between the punch 15 and the die 11 is always constant. It is what is kept.

Therefore, even when the plate-shaped work is moved and positioned between the upper and lower molds 3 and 5 in the X-axis and Y-axis directions and the work is pressed, the guide pin 41 and the work are not moved. Press work such as punching with high precision can be performed without interference and with the upper and lower molds 3 and 5 kept in alignment.

When working the work, the ram 43 is lowered by the operation of the actuator 47, and the work is pressed and fixed on the die 11 by the stripper plate 23. At this time, by controlling the output of the actuator 47, the pressing force of the stripper plate 23 on the work can be adjusted.

As described above, the stripper plate 23
After the work is properly pressed and fixed by the striker 5
By lowering the punch 15 by 1, punching of a work is performed. At this time, the axes of the punch 15, the die 11, and the stripper plate 23 are aligned, and high-precision processing is performed.

When the mold is detached and replaced with a separate mold, the guide bushes 3 in the upper and lower molds 3 and 5 are required.
The guide pins 41 are engaged with the upper and lower molds 9 and 37 again, and the upper and lower dies 3 and 5 are held in alignment.
That is, when the upper and lower dies 3 and 5 have the same axis, the dies are detached and replaced.

[0024]

As will be understood from the above description, according to the present invention, the upper and lower molds are held in a state where their axes are aligned by a plurality of guide pins, and the upper and lower molds are connected to the ram and the lower part. Since the above-mentioned guide pins can be removed after being fixed to the frame, even when the upper and lower molds are separated without the intervention of guide pins or the like, the axes of the upper and lower molds are in the same state, and the upper and lower molds are aligned. Even when a relatively large work is moved and positioned in the X-axis and Y-axis directions between the dies and press-working the work is performed, higher-precision processing is possible, and the conventional problems as described above are solved. Can be done.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a mold according to an embodiment of the present invention, which corresponds to a cross section taken along line II in FIG.

FIG. 2 is an explanatory sectional view showing a main part of a mold apparatus.

FIG. 3 is an explanatory bottom view of an upper die.

FIG. 4 is an explanatory plan view of a lower die.

[Explanation of symbols]

 3 Upper die 5 Lower die 11 Die 13 Die holder 15 Punch 17 Punch holder 23 Stripper plate 29 Plate holder 33, 41 Guide pin

Claims (1)

[Claims] 1. A die holder fixing a die, a punch holder holding a punch for working a work in cooperation with the die, and a stripper plate capable of pressing and fixing the work to the die at the time of working the work. In a mold apparatus provided with a plurality of alignment pins, both ends of which can be freely disengaged from an alignment hole provided in the stripper plate and an alignment hole provided in the die holder.
A die apparatus comprising a plurality of guide pins provided between the punch holder and the stripper plate in order to keep the axis position of the stripper plate and the punch constant.