CN216937993U

CN216937993U - Deep drawing die for controllable partition flexible blank pressing

Info

Publication number: CN216937993U
Application number: CN202123367170.8U
Authority: CN
Inventors: 王耀; 郭宏; 曹佳华; 宋国鹏; 解松; 纪福笑
Original assignee: Gaoyanzhizao Tianjin Technology Co ltd
Current assignee: Gaoyanzhizao Tianjin Technology Co ltd
Priority date: 2021-12-30
Filing date: 2021-12-30
Publication date: 2022-07-12
Anticipated expiration: 2031-12-30

Abstract

The utility model discloses a drawing die capable of controlling partition flexible blank pressing, belongs to the field of sheet forming, and solves the problem that the size and distribution of blank pressing force in a drawing forming process are difficult to control accurately and flexibly. The die is mainly characterized by comprising a female die, an edge pressing block, a pressure sensor, a male die and an oil cylinder. The blank pressing blocks are formed by sequentially arranging and installing the cushion blocks/the pressure sensors/the cushion blocks, the blank pressing rings are replaced by the cooperation of the plurality of blank pressing blocks, the blank pressing area is divided into partitions which are not affected with each other, then the oil cylinder is used as a force source to act on each blank pressing block, and finally the functions of partitioning the whole blank pressing area and accurately and flexibly controlling the blank pressing force of each partition are achieved. The die is mainly used in the field of manufacturing of automobile thin-wall skin parts.

Description

Deep drawing die for controllable partition flexible blank pressing

Technical Field

The utility model relates to the field of plate forming, in particular to a drawing die for a controllable partition flexible blank holder.

Background

The deep drawing process is a stamping method for forming a flat blank into an open hollow part by using a die, and is one of the most widely used stamping processes at present. The drawing process can be used for manufacturing thin-wall parts with irregular shapes such as cylinders, spheres, rectangles, curves and the like, and the drawing forming and other stamping processes are combined to manufacture parts with more complex shapes. The deep drawing forming die is simple in structure, only needs to be composed of main components such as a female die, a male die, a blank holder and a spring, and is high in forming and die unloading efficiency, low in manufacturing cost, short in manufacturing period and convenient to use and maintain.

Sheet material wrinkling is a problem which is difficult to avoid in the sheet material drawing forming process, and is also one of main reasons for sheet material cracking and damage in the forming process. Scientists have studied how to reduce the wrinkling of the sheet material during the forming process, wherein the related research on the wrinkling influence mechanism mainly based on the process parameters such as edge pressing force and edge pressing gap is more, but the related research on improving the wrinkling of the sheet material through the mold structure is less. At present, automobile parts in China are still manufactured mainly by a drawing forming process, particularly skin parts with complex characteristics have more serious wrinkling and cracking phenomena, and how to improve the wrinkling and cracking phenomena of plates in the drawing process is a key factor for improving yield, improving resource utilization rate and reducing cost. Most of the drawing and forming molds in the current market use a whole blank holder as a pressing part, and the size and the uniform distribution of the pressing force are difficult to be ensured. Therefore, a deep drawing die for a controllable partition flexible edge pressing is lacked at present.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the utility model aims to solve the problem of providing a drawing die for a controllable partition flexible edge pressing.

The technical scheme for solving the problems is to provide a drawing die for the controllable partition flexible edge pressing, which is characterized by comprising a female die, an edge pressing block, a pressure sensor, a male die and an oil cylinder.

The female die is positioned and arranged on the working machine tool; the blank holder is composed of a plurality of blank holder partitions, each blank holder is of a sandwich structure formed by sequentially arranging cushion blocks, pressure sensors and cushion blocks, wherein the pressure sensors are positioned and installed with the upper cushion block and the lower cushion block and used for feeding back the blank holder force state in real time; the oil cylinder is positioned and installed on each edge pressing block, the oil cylinder can realize the reciprocating motion of an oil cylinder plunger through oil inlet and outlet, and simultaneously the edge pressing force exerted by each edge pressing block is controlled by combining the result fed back by the pressure sensor; and finally, the male die descends to perform drawing forming on the part.

According to the wrinkling condition in the sheet drawing forming process, the blank holder force of each area of the sheet can be regulated and controlled before and during the forming process, the control precision of the blank holder force is essentially improved, and the forming quality of the sheet is improved.

Compared with the prior art, the utility model has the beneficial effects that: the mould has the advantages of simple structure and convenient installation, can realize flexible control of the blank pressing force on different subareas, can monitor the size and the uniform distribution condition of the blank pressing force of each area before and during the forming process, and improves the control precision of the blank pressing force so as to improve the wrinkling and cracking phenomena in the sheet forming process.

Drawings

FIG. 1 is a schematic view of the overall structure of a drawing die for a controllable partition flexible blank holder according to the present invention;

FIG. 2 is a schematic view of a drawing die blank holder configuration of the present invention;

FIG. 3 is a schematic view of the blank holder block structure of the drawing die of the present invention;

FIG. 4 is a schematic view of a drawing die pressure sensor of the present invention;

FIG. 5 is a schematic view of a drawing die of the present invention;

FIG. 6 is a schematic view of a drawing die cylinder of the present invention;

figure 7 is a schematic view of the drawing punch of the present invention.

In fig. 1: 1. a female die; 2. cushion blocks; 3. a pressure sensor; 4. an oil cylinder; 5. a male die; 6. an oil port.

Detailed Description

The following provides specific embodiments of the present invention. The detailed description is merely intended to illustrate the utility model in further detail, and not to limit the scope of the claims of the present application.

The utility model provides a deep drawing die (short for die) for a controllable partition flexible blank holder, which is characterized by comprising a female die 1, a cushion block 2, a pressure sensor 3, an oil cylinder 4, a male die 5 and an oil inlet 6.

Referring to fig. 3, the edge pressing block is a sandwich structure in which a cushion block 2/a pressure sensor 3/a cushion block 2 are sequentially arranged, wherein the pressure sensor 3 is positioned and installed between two layers of cushion blocks 2, and the positioning and installation can be realized by adopting a bolt connection mode and the like.

Referring to fig. 2, the binder is formed by matching four binder blocks, and it should be noted that the binder blocks do not need to be connected with each other, and the four binder blocks are independent components, so that A, B, C, D four partitions of the binder are formed.

Referring to fig. 6, the oil is fed through the oil port 6 to realize the up-and-down reciprocating motion of the oil cylinder, and then the force is acted on each edge pressing block to realize the flexible control of the edge pressing force.

Referring to fig. 1, the installation manner of the mold is as follows: the female die 1 is positioned and installed on an external machining machine which comprises a punching machine tool and the like, so that the position of the female die 1 can be conveniently regulated and controlled; after the cushion blocks 2 and the pressure sensors 3 are installed into the edge pressing blocks, the four edge pressing blocks are positioned and placed on the female die 1, the positioning mode can adopt pin positioning or clearance fit positioning and the like, and the pressure sensors in the edge pressing blocks are used for feeding back the edge pressing force and distribution state of each edge pressing area in real time; the four oil cylinders 4 are respectively positioned and installed on the four edge pressing blocks in a bolt connection mode, and the oil cylinders are used as a force source to control the edge pressing force of each edge pressing block partition; after the male die 5 is matched with the cavity of the female die 1 in a positioning way, the male die 5 descends to perform a drawing forming process.

The working process of the utility model is as follows:

(1) installing the die according to the operation mode;

(2) positioning the sheet material between the edge pressing block and the female die 1 to enable the sheet material to be positioned on the flange surface of the female die 1;

(3) presetting drawing forming process parameters, wherein the preset parameters comprise the size of a blank pressing gap and a blank pressing force;

(4) the four oil cylinders 4 are respectively controlled to move downwards through oil inlet of the oil ports 6, preset edge pressing force is respectively applied to A, B, C, D four edge pressing areas by taking the oil cylinders 4 as a force source, and the pressure of each area is detected according to the result fed back by the pressure sensor 3, and the uniform distribution condition is detected; if the blank pressing force of the area A is larger, the blank pressing force of the area A can be reduced through oil outlet of the oil port 6 of the oil cylinder 4 of the area A, otherwise, if the pressure of the area A is smaller, the blank pressing force is increased through oil inlet of the oil port 6; finally, flexible control of the blank pressing force of each subarea is realized, and the uniform distribution of the blank pressing force is ensured;

(5) controlling the male die 5 to descend, and performing a drawing forming process;

(6) in the deep drawing forming process, the blank holder force of A, B, C, D four areas is directionally regulated and controlled according to the wrinkling and cracking condition of each area of the plate, and simultaneously, the blank holder force and the distribution state reach the optimal forming condition of the plate according to the feedback result of the pressure sensor 3.

(7) And (5) finishing the drawing forming process, and demoulding to take the workpiece.

Nothing in this specification is said to apply to the prior art.

Claims

1. A deep drawing die for a controllable partition flexible blank holder is characterized by comprising a female die, a blank holder block, a pressure sensor, a male die and an oil cylinder;

positioning the edge pressing blocks on the female die, and replacing the edge pressing rings by the cooperation of a plurality of edge pressing blocks to divide an edge pressing area into a plurality of subareas which are not influenced mutually; the oil cylinders are respectively positioned and installed on the edge pressing blocks and are used as a force source to control the edge pressing force of each edge pressing block partition; the male die is matched with the cavity of the female die in a positioning way, and the male die can move downwards to perform a drawing forming process.

2. The deep drawing die for the controllable partition flexible blank pressing according to claim 1, wherein the blank pressing block is a sandwich structure formed by arranging cushion blocks/pressure sensors/cushion blocks in sequence, wherein the pressure sensors are positioned and installed with the upper cushion block and the lower cushion block and used for feeding back the blank pressing force state in real time before and during the forming.