JPH10286638A - Press die - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a press die by which a work wide in width can be worked by improving the centering structure of the upper die and lower die. SOLUTION: After assembling a packing plate 27, a punch plate 28 and a stripper plate 29 with each other, a guide pin 37 is passed through their holes 27a, 28a and 29a, and is fixed to a punch holder 21. After inserting the tip of the guide pin 37 into the hole 24a of a die plate 24 and positioning the guide pin 37 to a die holder 20, the guide pin 37 is mounted on a press device. After mounting it, and the punch holder 21 is descended to attach a jig 50 to the hole 24a, the punch holder 21 is ascended to push up the guide pin 37, then the guide pin 37 is fixed by a fixing bolt 40. Thereafter, the punch holder 21 is ascended again and the jig 50 clogging the hole 24a of the die plate 24 is removed, then the setting is completed. Since there is no projecting object between the die plate 24 and the stripper plate 29, the work wide in width can be worked.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a press die,
In particular, the present invention relates to an improved structure for centering.

[0002]

2. Description of the Related Art FIG. 1 is a cross-sectional view showing a conventional press die widely used. In the figure, reference numeral 1 denotes a die holder, 2 denotes a punch holder, a die plate 3 is suspended above the die holder 1, a punch plate 4 and a stripper plate 5 are suspended below the punch holder 2, and various types of the punch plate 4 are suspended. Punches 6 and 7, a pilot punch 8, a stripper guide pin 9, and the like are attached. A pair of guide posts 10 and 11 are arranged between the die holder 1 and the punch holder 2 for centering the lower die plate 3 and the upper die punch plate 4 and the stripper plate 5.

[0003] The guide post 10 has a die holder 1 at the lower end.
The guide bush 1 is inserted into the stepped hole 12 and fixed with a bolt 13 with a flange, and the upper end is attached to the punch holder 2.
4 is inserted. Therefore, the guide post 10 can be removed from the die holder 1 by removing the bolt 13. A spring 15 is mounted on the outer periphery of the guide post 10 to push the punch holder 2 upward and urge it. The other guide post 11 is fixed except that the lower end is inserted into the hole 16 of the die holder 1.
It has the same structure as the guide post 10.

[0004]

In the above-described conventional press die, the upper die and the lower die are centered by the guide posts 10 and 11, so that the precision can be maintained when the die is attached to the press device. However, the presence of the guide posts 10 and 11 makes it impossible to process a work wider than the space between them. In FIG. 1, one of the guide posts is detachable, but it can only be replaced when the guide post is worn, and cannot be removed every time a wide workpiece is machined.

Accordingly, an object of the present invention is to provide a press die capable of processing a wide workpiece by improving the centering structure of the upper die and the lower die.

[0006]

According to a first aspect of the present invention, there is provided a press die comprising an upper die holder for mounting an upper die, a lower die holder for mounting a lower die, and any one of these holders. A post-shaped or pin-shaped guide member provided so that the base end is attached to one of them and the distal end is inserted into a guide hole provided in another holder, and the upper and lower dies are provided by the guide member. In a press die capable of centering, the upper die held by the upper die holder and the lower die held by the lower die holder are provided with through holes through which the guide member can pass when centering. It is characterized by becoming.

According to a second aspect of the present invention, a hole for movably mounting the base end of the guide member is provided in the upper die holder or the lower die holder for mounting the base end of the guide member. An urging means is disposed in the hole to urge the guide member to protrude from the hole, and is capable of protruding and retracting in the hole in a direction intersecting with the axial direction of the guide member to lock the base end of the guide member. A locking means for holding is provided, and the base end of the guide member can be locked and held by the locking means in a state where the guide member is immersed in the hole.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 is a cross-sectional view showing one embodiment of a press die according to the present invention. In the figure, 20 is a die holder,
Reference numeral 21 denotes a punch holder, on which a die plate 24 is fixed. A backing plate 27, a punch plate 28, and a stripper plate 29 are suspended below the punch holder 21, and a number of punches 30 are attached to the punch plate 28.

In the figure, 31 is a punch plate fastening bolt, 32 is a stripper bolt, and 33 is a positioning pin for a press body (not shown). The stripper bolt 32 on the left side in FIG.
The stripper bolt 32 on the right side in FIG.
The stripper bolts 32 are urged downward by urethane rubber members 36 disposed on the base member 4.

The punch holder 21 and the die plate 2
4, holes 21a, 24a in backing plate 27, punch plate 28 and stripper plate 29, respectively.
27a, 28a, and 29a are configured so that their axes coincide with each other when the mold is set. Note that in the figure, 22
Is a positioning pin between the die holder 20 and the die plate 24, and 23 is a punch holder 21, a backing plate 2
Positioning pins 25 of the punch plate 7 and 25 are mounting bolts for mounting the die holder 20 to the press body (not shown), and 26 are mounting bolts for mounting the punch holder 21 to the press body.

Among the above-mentioned holes, the punch holder 21 and the hole 21
In a, a guide pin 37 is inserted from the upper end side, a spring 38 is further mounted from above, and a screw plug 39 is screwed into the upper end of the hole 21a to prevent it from falling off.
The body 37a of the guide pin 37 is urged to protrude downward.

[0012] Of the holes in the die plate 24, the backing plate 27, the punch plate 28, and the stripper plate 29, the die plate 24, the punch plate 2
8 and the holes 24a, 28a, 2 in the stripper plate 29.
9a, the diameter of the hole 27a of the backing plate 27 is the same as that of the hole 27a.
Bush 24b,
28b and 29b are fitted. The hole 27a of the backing plate 27 has a smaller diameter than the hole 21a of the punch holder 21, and the edge thereof can receive the flange of the head 37b of the guide pin 37.

In this structure, the guide pin 37 projects downward by the urging force of the spring 38,
It rises when it receives a force from below that opposes the urging force. In order to maintain the raised state of the guide pin 37, FIG.
As shown in (B), a horizontal hole 40 is formed in the punch holder 21.
, From which the fixing bolt 41 can be inserted. That is, the fixing bolt 41 is inserted in a state where the head 37b of the guide pin 37 is located above the hole 40, and the tip of the fixing bolt 41 can receive the flange portion of the head 37b of the guide pin 37. When the head 37b is received by the fixing bolt 41, the length of the body 37a of the guide pin 37 is set so that the tip does not project downward from the lower surface of the stripper plate 29. Therefore hole 21
The depth dimension of “a” is set to be equal to or larger than the movement amount of the guide pin 37.

Next, a procedure for setting the die holder 20 and the punch holder 21 in this embodiment, that is, a procedure for setting the mold in the present embodiment will be described with reference to FIGS.

First, from the upper side, a backing plate 27,
Holes 27a, 28a, 2
9a, the plates are combined, and the punch holder 31 is fastened with the punch plate fastening bolts 31 so that the body 37a of the guide pin 37 projecting downward from the lower surface of the punch holder 21 passes through the holes 27a, 28a, 29a. Fix to 21. A spring 35 and a urethane rubber material 36 are also attached. It is easier to attach the backing plate 27 and the like to the guide pin 37 by biasing it in advance from the hole 21a by the spring 38 and the screw plug 39. May be attached to the hole 21a.

In this state, if the tip of the body 37a of the guide pin 37 protruding from the lower surface of the stripper plate 29 is inserted into the hole 24a of the die plate 24, the die holder 20 and the punch holder 21 are formed as shown in FIG. It is positioned with high precision, the mold setting is completed easily, and it can be mounted on the press as it is.

After the die set as described above is mounted on the press device, the punch holder 21 is raised, and the body 37a of the guide pin 37 is once inserted into the hole 2 of the die plate 24.
4a, the upper end opening of the hole 24a is covered with an appropriate jig 50, and then the punch holder 21 is lowered.
Then, the trunk portion 37a of the guide pin 37 does not enter the hole 24a, so that the guide pin 37 is pushed up against the urging force of the spring 38, and the head 37b rises in the hole 21a. In the state where the press device has reached the bottom dead center, the state shown in FIG. 4 is obtained. Therefore, the fixing bolt 41 is inserted into the hole 40, and the flange portion of the head 37b of the guide pin 37 is received.
In combination with the biasing force of the spring 38, the movement of the guide pin 37 is blocked.

In this state, the punch holder 21 is raised again, and the jig 50 that has closed the hole 24a of the die plate 24 is held.
Remove and complete the setting. Then, since there is no protrusion between the die plate 24 and the stripper plate 29, a wide workpiece can be easily processed.

[0019]

According to the present invention, there is provided a press die according to the present invention.
As described above, since the upper die held by the upper die holder and the lower die held by the lower die holder are provided with through holes through which the guide members can pass, as described above, There is an effect that the centering of the upper mold and the lower mold can be easily performed only by matching the upper mold holder and the lower mold holder without the need for a guide post.

The press die according to the second aspect of the present invention is, as described above, the upper die holder or the lower die holder for mounting the base end of the guide member. A hole for movably mounting the end side is provided, the guide member is projected and urged by urging means arranged in the hole, and the base end of the guide member immersed in the hole can be locked and held by locking means. Therefore, in addition to the above-mentioned common effects, after centering and attaching to the press device, it is possible to retract the guide pin that penetrates the upper mold and the lower mold as it is, and it is blocked by the conventional guide post This has the effect that a wide workpiece that could not be machined can be machined. Further, since a guide post is not required, there is an effect that not only can the die weight be reduced, but also the die installation space of the press device can be reduced.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a conventional press die.

FIG. 2 is a sectional view showing one embodiment of a press die according to the present invention.

FIG. 3 is a cross-sectional view showing a state where an upper die and a lower die are centered by a guide pin in one embodiment of the press die according to the present invention.

FIG. 4 is a cross-sectional view (A) and a side cross-sectional view (B) of a state where an upper die and a lower die are centered and a guide pin is retracted in an embodiment of the press die according to the present invention. .

[Explanation of symbols]

 Reference Signs List 20 die holder 21 punch holder 21a hole 22, 23 positioning pin 24 die plate 24a hole 24b bush 25, 26 mounting bolt 27 backing plate 27a hole 28 punch plate 28a hole 28b bush 29 stripper plate 29a hole 29b bush 30 hole punch 31 punch plate Fastening bolt 32 Stripper bolt 33 Locating pin 34 Hole 35 Spring 36 Urethane rubber material 37 Guide pin 37a Guide pin body 37b Guide pin head 38 Spring 39 Screw plug 40 Hole 41 Fixing bolt 50 Jig

Claims (2)

[Claims] An upper mold holder for attaching an upper mold, a lower mold holder for attaching a lower mold, and a guide having a base end attached to one of these holders and a distal end provided on another holder. A press die provided with a post-shaped or pin-shaped guide member provided so as to be inserted into the hole, and the guide member allows centering of the upper die and the lower die. A press die, wherein the upper die and the lower die held by the lower die holder are provided with through holes through which the guide member can pass when centering. 2. A hole for movably mounting the base end of the guide member on the upper die holder or the lower die holder for mounting the base end of the guide member, and biasing means in the hole. And a locking means for projecting and urging the guide member out of the hole and capable of protruding and retracting into the hole in a direction intersecting with the axial direction of the guide member and locking and holding a base end of the guide member. 2. The press die according to claim 1, wherein said guide member can be locked and held by said locking means while said guide member is immersed in said hole.