CN210523590U

CN210523590U - Drawing die capable of preventing damage of male die molded surface

Info

Publication number: CN210523590U
Application number: CN201921302481.6U
Authority: CN
Inventors: 刘佳
Original assignee: Chongqing Pingwei Automotive Technology Co ltd
Current assignee: Chongqing Pingwei Automotive Technology Co ltd
Priority date: 2019-08-12
Filing date: 2019-08-12
Publication date: 2020-05-15
Anticipated expiration: 2029-08-12

Abstract

The utility model discloses a can prevent drawing die of terrace die profile damage, including upper die base and die holder, be provided with blank holder and terrace die on the die holder, wherein the blank holder has the terrace die via hole, and the terrace die is located this terrace die via hole, the blank holder bottom corresponds terrace die via hole border position and distributes and has the ejector pin leg of downwardly extending, and the blank holder bottom corresponds terrace die via hole border position and installs the cushion, and this cushion adopts flexible material to make, the lower extreme of cushion exceeds the lower extreme of ejector pin leg, the lateral margin of cushion exceeds the inside wall of terrace die via hole. The utility model has the advantages that: the cushion block can protect the molded surface of the male die, the molded surface of the male die is prevented from being damaged by collision, the workload of performing phase welding repair or insert on the male die in the later period is eliminated, the cost is saved, the drawing precision of a product can be ensured, and the qualification rate of the product is improved.

Description

Drawing die capable of preventing damage of male die molded surface

Technical Field

The utility model relates to a mould, concretely relates to can prevent drawing die utensil of terrace die profile damage.

Background

The drawing die is a process device which enables a flat plate-shaped blank to obtain a stable space shape through plastic deformation under the action of a press machine and the combined action of a convex die and a concave die. The drawing die may be classified into a single action drawing die and a double action drawing die according to the equipment used.

In the stretching process of the die, in order to prevent the edge of the sheet from buckling and wrinkling, a blank holder is usually added in the die, the blank holder is a movable part surrounding the periphery of the male die, is of a hollow structure, is generally mounted on a lower die base in an up-down lifting mode, and is usually provided with a downward protruding ejector rod leg at the bottom for effectively driving the lifting of the blank holder. And in the process of hoisting the blank holder, the ejector pin leg moves downwards to often damage the molded surface of the male die when passing through the male die, and the later-stage welding repair or the insert of the male die needs a large workload, so that the precision of the product is influenced, and the qualification rate of the product cannot be ensured.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a can prevent drawing die of terrace die profile damage to solve at the in-process of hoist and mount blank holder, the technical defect of terrace die profile can be bruised to the ejector pin leg.

In order to achieve the above purpose, the utility model discloses technical scheme as follows:

the utility model provides a can prevent drawing die of terrace die profile damage, includes upper die base and die holder, be provided with blank holder and terrace die on the die holder, wherein the middle part of blank holder is equipped with the terrace die via hole, and the terrace die is located this terrace die via hole, the blank holder bottom corresponds terrace die via hole border position and distributes and have the ejector pin leg of downwardly extending, and its key lies in: the bottom of the blank holder is provided with a cushion block corresponding to the edge of the through hole of the male die, the cushion block is made of flexible materials, the lower end of the cushion block exceeds the lower end of the ejector rod leg, and at least part of the outer edge of one side of the cushion block protrudes out of the inner side wall of the through hole of the male die.

By adopting the structure, when the push rod leg moves downwards to pass through the edge of the male die in the process of hoisting the blank holder, the push rod leg cannot be in direct contact with the molded surface of the male die due to the protection arrangement of the cushion block, so that the molded surface of the male die is protected, the molded surface of the male die is prevented from being damaged by collision, the workload of performing periodical welding repair or insert on the male die in the later period is eliminated, the cost is saved, the drawing precision of a product can be ensured, and the qualification rate of the product is improved.

Preferably, the method comprises the following steps: and a reinforcing rib is arranged between the two ejector rod legs close to the cushion block, a mounting groove is formed in the reinforcing rib, and the cushion block is fixed on the mounting groove through a screw. By adopting the structure, the installation strength of the cushion block can be effectively ensured.

Preferably, the method comprises the following steps: the cushion block is of a cuboid structure, and a chamfer is arranged at the edge position of the lower end of the cushion block. By adopting the structure, the assembly is convenient.

Preferably, the method comprises the following steps: the lower end of the cushion block exceeds the lower end of the ejector rod leg by 15-25 mm.

Preferably, the method comprises the following steps: the lateral margin of the cushion exceeds the inner side wall of the punch through hole by 3-8 mm.

Preferably, the method comprises the following steps: the cushion block is made of polyurethane.

Preferably, the method comprises the following steps: the die holder both ends tip all is equipped with first guide bar and second guide bar, is equipped with the guide post between first guide bar and the second guide bar, and the height that highly is higher than first guide bar and second guide bar of this guide post is equipped with first guiding hole respectively corresponding first guide bar and second guide bar position on the upper die base, corresponds the guide post position and is equipped with the second guiding hole. By adopting the structure, the guide post is higher than the two guide rods, so that the positioning tool on the blank holder can be protected, and the upper die is prevented from damaging the positioning tool in the descending process of the upper die base.

Compared with the prior art, the beneficial effects of the utility model are that:

adopt the utility model provides a can prevent drawing die of terrace die profile damage, the cushion can play the guard action to the profile of terrace die, prevents that the terrace die profile from being damaged by the collision to eliminate the work load that need carry out stage weld repair or insert to the terrace die later stage, practice thrift the cost, and can guarantee the drawing precision of product, improve the qualification rate of product.

Drawings

FIG. 1 is a schematic structural view of a drawing die;

FIG. 2 is a schematic view of the construction of the binder (bottom up);

FIG. 3 is an enlarged view of a portion of FIG. 2 at I;

FIG. 4 is a partial cross-sectional view of the location of the blankholder with a pad.

Detailed Description

The present invention will be further described with reference to the following examples and accompanying drawings.

As shown in fig. 1 and 2, the drawing die capable of preventing the damage of the profile of the male die structurally comprises an upper die holder 1 and a lower die holder 2, wherein a blank holder 3 and a male die 6 are arranged on the lower die holder 2, the blank holder 3 and the male die 6 are respectively provided with two groups, the blank holder 3 is provided with a male die through hole 3a, the male die 6 is correspondingly arranged in the male die through hole 3a, and ejector pin legs 3b extending downwards are distributed at the bottom of the blank holder 3 corresponding to the edge of the male die through hole 3 a.

As shown in fig. 3 and 4, in order to prevent the blank holder 3 from being hoisted, the end part of the lower end of each ejector rod leg 3b from damaging the molded surface of the male die 6, a reinforcing rib 3c is arranged between the gaps of the adjacent ejector rod legs 3b, a mounting groove 3d is arranged on each reinforcing rib 3c, a cushion block 4 is fixed on each mounting groove 3d in a screw connection mode, each cushion block 4 is of a cuboid structure and made of polyurethane, the distance between the lower end of each cushion block 4 and the lower end of each ejector rod leg 3b exceeds the lower end of each ejector rod leg 3b is 15-25 mm, the distance between the side edge 4a of each cushion block 4 and the inner side wall 3e of each male die through hole 3a is 3-8 mm, and based on the structural layout, in the blank holder 3 hoisting process, due to the protection arrangement of the soft polyurethane cushion block 4, the ejector rod legs 3b cannot be in direct contact with.

In this embodiment, the distance from the lower end of the spacer 4 beyond the lower end of the ejector leg 3b is preferably set to 20 mm; the distance by which the side edge 4a of the spacer 4 exceeds the inner side wall 3e of the punch through hole 3a is preferably set to 5mm.

The edge position of the lower end of the cushion block 4 is provided with a chamfer c, and the chamfer c can play a certain guiding role in downward hoisting of the blank holder 3.

As shown in fig. 1, a first guide rod 2a and a second guide rod 2b are arranged at the end of the lower die holder 2, a guide post 2c is arranged between the two guide rods, the height of the guide post 2c is higher than that of the first guide rod 2a and that of the second guide rod 2b, a first guide hole 1a is arranged at the position of the upper die holder 1 corresponding to the first guide rod 2a and that of the second guide rod 2b, a second guide hole 1b is arranged at the position corresponding to the guide post 2c, and a positioning tool 5 is arranged on the blank holder 3.

Finally, it should be noted that the above description is only a preferred embodiment of the present invention, and those skilled in the art can make various similar representations without departing from the spirit and the scope of the present invention.

Claims

1. The utility model provides a can prevent drawing die of terrace die profile damage, includes upper die base (1) and die holder (2), be provided with blank holder (3) and terrace die (6) on die holder (2), wherein the middle part of blank holder (3) is equipped with terrace die via hole (3a), and terrace die (6) are located this terrace die via hole (3a), it has downwardly extending ejector pin leg (3b), its characterized in that to distribute to correspond terrace die via hole (3a) border position in blank holder (3) bottom: the bottom of the blank holder (3) is provided with a cushion block (4) corresponding to the edge of the punch through hole (3a), the cushion block (4) is made of flexible materials, the lower end of the cushion block (4) exceeds the lower end of the ejector rod leg (3b), and at least part of the outer edge of one side of the cushion block (4) protrudes out of the inner side wall of the punch through hole (3 a).

2. The drawing die capable of preventing damage to the male die surface according to claim 1, wherein: be close to be equipped with strengthening rib (3c) between two ejector pin legs (3b) of cushion (4), be equipped with mounting groove (3d) on strengthening rib (3c), cushion (4) are through the fix with screw on mounting groove (3 d).

3. The drawing die capable of preventing damage to the male die surface according to claim 2, wherein: the cushion block (4) is of a cuboid structure, and a chamfer (c) is arranged at the edge position of the lower end of the cushion block.

4. The drawing die capable of preventing damage to the male die surface according to claim 1, 2 or 3, wherein: the lower end of the cushion block (4) exceeds the lower end of the ejector rod leg (3b) by 15-25 mm.

5. The drawing die capable of preventing damage to the male die surface according to claim 4, wherein: the lateral edge of the cushion block (4) exceeds the inner side wall of the punch through hole (3a) by 3-8 mm.

6. The drawing die capable of preventing damage to the male die surface according to claim 1, 2 or 3, wherein: the cushion block (4) is made of polyurethane.

7. The drawing die capable of preventing damage to the male die surface according to claim 1, wherein: the die holder (2) both ends tip all is equipped with first guide bar (2a) and second guide bar (2b), be equipped with between first guide bar (2a) and second guide bar (2b) guide post (2c), the height that highly is higher than first guide bar (2a) and second guide bar (2b) of this guide post (2c), upper die base (1) is equipped with first guiding hole (1a) respectively corresponding first guide bar (2a) and second guide bar (2b) position, it is equipped with second guiding hole (1b) to correspond guide post (2c) position.