CN203621222U

CN203621222U - Drawing die

Info

Publication number: CN203621222U
Application number: CN201320597814.9U
Authority: CN
Inventors: 邓勇宾; 杨丁丁; 翟海峰; 谷晓玉; 李松
Original assignee: Great Wall Motor Co Ltd
Current assignee: Great Wall Motor Co Ltd
Priority date: 2013-09-26
Filing date: 2013-09-26
Publication date: 2014-06-04
Anticipated expiration: 2023-09-26

Abstract

The utility model discloses a drawing die, relates to the technical field of car manufacturing, and aims to avoid wrinkling of stamped parts and increase material utilization rate. The drawing die comprises a male die, a binder ring and a female die. The binder ring is disposed at the edge between the female die and the male die. The male die combines with the female die to form a cavity. The cavity is a structure with a differential part. The corner of a parting line of the drawing die is provided with a recess part. The recess part is close to the differential part of the cavity. The drawing die is mainly used for punching sheet metal.

Description

A kind of drawing die

Technical field

The utility model relates to field of automobile, relates in particular to the drawing die that a kind of sheet metal component punch forming is used.

Background technology

Nowadays, the most of sheet metal component on automobile, heavy industry and a lot of machinery, electric equipment all uses drawing die punching press to make, and drawing die plays very important effect in automobile metal plate work manufacture field.

Drawing die is made up of punch, die and blank holder three-major-items conventionally, and its stamping forming stamped part is mostly the structure with fluctuating drop, thereby forms stepped or be similar to stair-stepping structure.Because material when the punching press always flows to the place that profile is low, and the uniformity of walking material is also difficult to control, therefore makes stamping parts loss of stability and at drop part generation wrinkling, affect the quality of stamping parts than being easier to.

For this reason, prior art has proposed a kind of solution, and in the time using drawing die to carry out punching press moulding, the drop part at stamping parts is used " remaining meat " polishing, to slow down the wrinkling of drop part, die parting line adopts mild Rouno Cormer Pregrinding Wheel transition simultaneously, there will not be corner sharply.This " remaining meat ", although the method for polishing can solve wrinklingly, and " remaining meat " is unwanted part in punch forming part, and the size of the stamping strip part that therefore can make is larger, reduces stock utilization.

Utility model content

Embodiment of the present utility model provides a kind of drawing die, in avoiding stamping parts wrinkling, can improve preferably the utilization rate of material.

For achieving the above object, embodiment of the present utility model adopts following technical scheme:

The utility model provides a kind of drawing die, comprise punch, blank holder, die, edge part between described die and described punch is provided with described blank holder, and form die cavity after described punch and described die matched moulds, described die cavity has the structure of fall-part, the corner of the die parting line of described drawing die is provided with depressed part, and described depressed part is near the fall-part of described die cavity.

Further, described depressed part is circular arc.

Wherein, the corner at described die edge forms protruding in described die cavity convex surface, and the corner at described punch edge forms the concave surface corresponding with described convex surface, and described concave surface and described convex surface match and form the depressed part of described die parting line.

Further, the corner that described blank holder edge is corresponding with described concave surface is convex surface.

What the utility model embodiment provided comprises punch, blank holder, die, edge part between described die and described punch is provided with described blank holder, and form die cavity after described punch and described die matched moulds, described die cavity has the structure of fall-part, the corner of the die parting line of described drawing die is provided with depressed part, described depressed part is near the fall-part of described die cavity, can make like this fall-part of depressed part near stamping parts, in plate shaping process, stamping parts easily wrinkling drop part is pushed down by depressed part, avoid to large extent occurring wrinkling phenomenon, due to the utility model, not adopt the mode of " remaining meat " polishing to alleviate stamping parts wrinkling, therefore can make the size of stamping strip part smaller, improves preferably the utilization rate of material.

Accompanying drawing explanation

In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.

In the drawing die that Fig. 1 provides for the utility model embodiment, die parting line has the schematic diagram of depressed part;

Fig. 2 is the enlarged diagram of A portion in Fig. 1;

The schematic diagram of the stamping parts of Fig. 3 after for the drawing die punch forming providing through the utility model embodiment.

The specific embodiment

Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, the every other embodiment that those of ordinary skills obtain under the prerequisite of not making creative work, belongs to the scope that the utility model is protected.

First for drawing die, it conventionally passes through die sinking, mold closing, these three processes of die sinking in the whole process of punching press plate, and its whole process is defined as a stroke.When die sinking, blank holder meeting jack-up, it is slightly higher than punch (being cover half), then stamping parts is dropped in the middle of drawing die; Then moved downward by die (dynamic model), start to enter mold closing state; After first stamping parts being pushed down by die and blank holder, continue to move downward and make punch enter die with whole stamping parts, thereby complete whole drawing process.In punching course, tablet can flow to low profile from high-profile, makes the fall-part of stamping parts easily cause wrinkling.For fear of the generation of this phenomenon, the utility model embodiment provides drawing die as described below.

In the drawing die that Fig. 1 provides for the utility model embodiment, die parting line has the schematic diagram of depressed part, be understandable that, because punch and die are the products of comparative maturity in prior art, even if therefore punch not shown in the figures, die, also can't impact understanding embodiment of the present utility model.

Shown in seeing figures.1.and.2, this drawing die comprises punch, blank holder 1, die, edge part between described die and described punch is provided with described blank holder 1, and form die cavity after described punch and described die matched moulds, described die cavity has the structure of fall-part, the corner of the die parting line 2 of described drawing die is provided with depressed part, described depressed part 20 is near the fall-part of described die cavity, can make like this fall-part of depressed part near stamping parts, in plate shaping process, stamping parts easily wrinkling drop part is pushed down by depressed part, avoid to large extent occurring wrinkling phenomenon, in addition, due to the utility model, not adopt the mode of " remaining meat " polishing to alleviate stamping parts wrinkling, therefore can make the size of stamping strip part smaller, improves preferably the utilization rate of material.

As the preferred scheme of one, above-mentioned depressed part 20 can be circular arc, and the depressed part of this circular arc type can be controlled the uniformity that flows to of tablet better, therefore can avoid better occurring wrinkling.Certainly, can also increase pressure-pad-force, further to eliminate wrinkling phenomenon.

For the depressed part 20 of die parting line, its specifically can: form protruding in described die cavity convex surface in the corner at described die edge, the corner at described punch edge forms the concave surface corresponding with described convex surface, and described concave surface and described convex surface match and form the depressed part 20 of described die parting line 2.

As the further preferred scheme of the utility model, the corner that described blank holder 1 edge is corresponding with described concave surface is also convex surface.

The feature of this drawing die is described in conjunction with Fig. 1-Fig. 3, in mould punching process, die moves downward and coordinates with blank holder 1 when stamping parts is pushed down, drawing die is pushed down the border of stamping parts in the time of this shape and punch moulding, the depressed part of die parting line is pushed down the part of the high low head of stamping parts simultaneously, in order to avoid better wrinkling, can make depressed part be circular arc, in the time that die drives blank holder 1 to move downward with punch moulding, this drop part can be not wrinkling so yet.As the B part marking in Fig. 3, this part is fall-part, after the drawing die punch forming providing, there is no phenomenon through the utility model embodiment.

The drawing die that the utility model embodiment provides can the various parts of punch forming, plate as inside and outside in car door, gusset upper prop etc.

Above; it is only the specific embodiment of the present utility model; but protection domain of the present utility model is not limited to this; any be familiar with those skilled in the art the utility model disclose technical scope in; can expect easily changing or replacing, within all should being encompassed in protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with the protection domain of claim.

Claims

1. a drawing die, it is characterized in that, comprise punch, blank holder, die, edge part between described die and described punch is provided with described blank holder, and form die cavity after described punch and described die matched moulds, described die cavity has the structure of fall-part, and the corner of the die parting line of described drawing die is provided with depressed part, and described depressed part is near the fall-part of described die cavity.

2. drawing die according to claim 1, is characterized in that, described depressed part is circular arc.

3. drawing die according to claim 1 and 2, it is characterized in that, the corner at described die edge forms protruding in described die cavity convex surface, and the corner at described punch edge forms the concave surface corresponding with described convex surface, and described concave surface and described convex surface match and form the depressed part of described die parting line.

4. drawing die according to claim 3, is characterized in that, the corner that described blank holder edge is corresponding with described concave surface is convex surface.