CN113680902B

CN113680902B - Drawing die structure for driving male die and fixed male die and use method

Info

Publication number: CN113680902B
Application number: CN202110801207.9A
Authority: CN
Inventors: 底晓炜; 王治恩; 赵明; 查向阳; 张伟; 赵雷; 刘君君; 刘志见
Original assignee: Chery Commercial Vehicle Anhui Co Ltd
Current assignee: Chery Commercial Vehicle Anhui Co Ltd
Priority date: 2021-07-15
Filing date: 2021-07-15
Publication date: 2023-06-30
Anticipated expiration: 2041-07-15
Also published as: CN113680902A

Abstract

The invention discloses a drawing die structure for driving a male die and a fixed male die, which relates to the technical field of automobile stamping dies and comprises a female die; and (3) male die: the male die comprises a fixed male die and a movable male die, and the movable male die is connected with a driving structure and drives the movable male die to slide; the surface A of the male die is inclined towards the side back to the movable male die, and the highest point of the sliding limit of the movable male die is higher than the highest point of the surface A of the male die. The beneficial effects of the invention are as follows: dividing the male die into two parts, namely a fixed male die and a movable male die, wherein the movable male die is positioned on the back side of the inclined A surface of the male die; the sequence of the contact of the plate with the die is adjusted by utilizing the movable male die, so that the included angle between the plate and the face A of the die can be effectively changed when the plate contacts; the included angle is reduced when the plate contacts with the R angle of the male die, excessive sliding of the plate on the R angle is prevented, the phenomenon that the plate hangs the male die is effectively avoided, and the risk of sliding lines is reduced.

Description

Drawing die structure for driving male die and fixed male die and use method

Technical Field

The invention relates to the technical field of automobile stamping dies, in particular to a drawing die structure for driving a male die and a fixed male die and a use method thereof.

Background

At present, a plurality of automobile models require that the R angle of the appearance ridge is smaller and smaller, which breaks through the limitation of the traditional manufacturing process on the R angle of the appearance ridge, and accordingly, the process analysis stage is difficult to avoid, and the ridge slipping defect which is difficult to overcome in the manufacturing stage is caused. In order to avoid serious appearance quality risks in the later period, in order to improve the perception quality of the whole automobile, a novel mold structure capable of effectively avoiding the edge line sliding defect of the outer covering part is specially developed.

Disclosure of Invention

The invention aims to provide a drawing die structure for driving a male die and a fixed male die, so as to solve the problems in the background technology.

In order to solve the technical problems, the invention provides the following technical scheme: a drawing die structure for driving a male die and a fixed male die comprises a female die;

and (3) male die: the male die comprises a fixed male die and a movable male die, and the movable male die is connected with a driving structure and drives the movable male die to slide;

the surface A of the male die is inclined towards the side back to the movable male die, and the highest point of the sliding limit of the movable male die is higher than the highest point of the surface A of the male die.

Preferably, the driving structure is a nitrogen cylinder.

Preferably, the driving structure is connected to the bottom position of the movable punch.

Preferably, the mold is an automobile back door outer panel mold.

Preferably, the movable punch is located at the middle position of the die structure.

Compared with the prior art, the invention has the beneficial effects that: dividing the male die into two parts, namely a fixed male die and a movable male die, wherein the movable male die is positioned on the back side of the inclined A surface of the male die;

the sequence of the contact of the plate with the die is adjusted by utilizing the movable male die, so that the included angle between the plate and the face A of the die can be effectively changed when the plate contacts; the included angle is reduced when the plate contacts with the R angle of the male die, excessive sliding of the plate on the R angle is prevented, the phenomenon that the plate hangs the male die is effectively avoided, and the risk of sliding lines is reduced.

Drawings

FIG. 1 is a cross-sectional view of a mold of the present invention;

fig. 2 is a schematic diagram of a molded part (a in the drawing is a molding position of a male mold a surface, and B in the drawing is a molding position of a movable male mold);

FIG. 3 is a schematic diagram of the angle between the plate and the A face of the male die in the working state (wherein A is the A face of the male die and a is the plate);

FIG. 4 is a schematic cross-sectional view of a mold;

fig. 5 is a schematic diagram of the steps of die opening.

Detailed Description

In order to facilitate use, the embodiment of the invention provides a drawing die structure for driving a male die and a fixed male die. The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

The embodiment provides a drawing die structure for driving a male die and a fixed male die, and referring to fig. 1, the embodiment takes an automobile back door outer plate die as an example.

Comprising a female die 1 positioned at the upper part and a male die positioned at the lower part. The male die comprises a movable male die 3 and a fixed male die 4;

referring to the figure, the fixed punch 4 is shown as a die A surface (the process requirement is higher), and the movable punch 3 is positioned on the right side of the fixed punch;

it is worth mentioning here that the contact position of the male die and the plate material at the first stage of the molding of the die is necessarily the R angle of the bulge; small contact area, large slippage, and defects (obvious slippage marks) caused by the large slippage; in the embodiment, a part of movable male dies are adopted and are used for adjusting the area when the plate material contacts with the surface A of the male dies; in reference to the figure, the movable punch 3 can be driven by a nitrogen cylinder (arranged at the bottom of the movable punch), and the pressing force, the pressing stroke and the blank holder are kept equal, so that synchronous pressing and synchronous discharging are realized, and the offset of a workpiece in the discharging process caused by uneven stress or stroke deviation is avoided.

Based on the conception, the contact angle of the plate and the R angle of the A surface of the male die is reduced (the smaller the angle is, the better the angle is), the plate and the A surface are completely attached to be in an optimal ideal state, namely, the plate and the A surface are completely in surface contact; in the reference figure, the purpose of the moving punch 3 is to pull the angle of the sheet upwards so that it adapts to the inclination angle of the punch a face; then, the position of the movable punch 3 must lie on the back face toward which the face of the punch a is inclined, i.e., the position of the movable punch 3 is close to the highest point of the face of the punch a.

Referring to fig. 1, when in use, the movable punch 3 is jacked up, and the plate material firstly contacts the top of the movable punch 3 and deforms along with the stress;

the plate continues to move downwards under the action of the female die 1 and the movable male die 3, and when the plate touches the fixed male die 4 (and the male die A surface), as shown in reference to FIG. 3, the included angle between the plate and the male die A surface is reduced to about 10 degrees under the support of the movable male die 3 positioned in the middle of the plate, and the point contact with the R angle is changed into the surface contact;

at the moment, the plate continues to move downwards, and in the subsequent stamping forming process, the friction coefficient between the plate and the fixed punch R angle is reduced, and the sliding quantity of the plate on the R angle is reduced, so that the sliding line of the ridge line is lightened.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a draw die structure of drive terrace die and fixed terrace die which characterized in that: the die is used for producing the outer plate of the automobile back door and comprises a die;

the surface A of the male die is inclined towards the side back to the movable male die, and the limit highest point of sliding of the movable male die is higher than the highest point of the surface A of the male die;

the driving structure is connected to the bottom position of the movable male die;

the movable male die is positioned in the middle of the die structure;

and comprises the following using steps:

the movable male die is ejected upwards to increase the drop with the fixed male die, when a plate falls, the plate is contacted with the movable male die at first and then continuously descends, and the plate is contacted with the surface R of the male die A in an angle manner;

the movable male die and the female die simultaneously face downwards, in the process, the movable male die upwards pulls the plate to enable the plate to adapt to the inclined angle of the A face of the male die, the angle between the plate and the fixed male die is gradually reduced, the included angle between the plate and the A face of the male die is reduced to 10 degrees under the support of the movable male die positioned in the middle of the plate, and the point contact with the R angle is changed into surface contact until the plate is formed to the bottom.

2. A drawing die structure for driving a male die and a fixed male die as claimed in claim 1, wherein: the driving structure is a nitrogen cylinder.