CN202278096U

CN202278096U - Module-type flexible drawing die

Info

Publication number: CN202278096U
Application number: CN2011204190134U
Authority: CN
Inventors: 杜继涛; 朱正龙; 丁永忠; 杨梅; 张利华
Original assignee: Shanghai University of Engineering Science
Current assignee: Shanghai University of Engineering Science
Priority date: 2011-10-28
Filing date: 2011-10-28
Publication date: 2012-06-20
Anticipated expiration: 2021-10-28

Abstract

A module-type flexible drawing die comprises an upper die part and a lower die part, wherein the upper die part comprises a die shank, an upper die holder, a bearing plate, a male die fixing plate, a male die and a blank holder; and the lower die part comprises a female die plate, a female die mold insert, a lower die holder, a material ejection plate and a base. The module-type flexible drawing die is characterized in that the female die mold insert is formed by combining brackets; bearing sleeves are mounted at the drawing forming parts of the brackets; and roller shafts are mounted in the bearing sleeves. The module-type flexible drawing die adopting the technical scheme has the benefits that when the male die presses a plate into a female die forming cavity after the plate is pressed by the blank holder, the plate is in rolling friction with the bearing sleeve, so that the quality defects such as pulling, scratching and the like of material are reduced, the material is prevented from being pulled broken, at the same time, as long as the female die mold insert is replaced, similar drawing products can be formed.

Description

The flexible drawing die of a kind of modular

Technical field

The invention belongs to the material forming technical field, specifically just relate to the flexible drawing die of a kind of modular.

Background technology

Drawing die is widely used a kind of mould in the modern product manufacturing field; In the process of metallic article stretch forming, the flange fixing installation of drawing die generally has two big types: one type is the elastic blank holding device, adopts rubber usually; Spring, air cushion is as the source of pressure-pad-force; Another kind of is the rigid blank holder device, needs to cooperate double action press just can work usually.But all can existing, the stretch forming mode of using these two kinds of flange fixing installations pulls open and wrinkling two kinds of defectives that influence product quality; Sheet material is drawn in die by punch in the present cupping tool structure, and when stretching beginning, sheet material is tightly pushed down by flange fixing installation; When sheet material is drawn in the die forming cavity by punch; Sheet material and die generation strong friction usually can produce surface blemishes such as plucking, scratch, plastic indentation, have a strong impact on the presentation quality of product; The while pressure-pad-force is crossed the materials flow of conference hampering plate and is gone into the die hole, and then brings out the defective that plate is pulled open; Simultaneously since at present drawing die generally become monoblock type, a secondary mould can only a kind of product of pull and stretch, for the drawing part of similar shape, need manufacture and design corresponding mould, the production cycle is long, cost is also higher.

Summary of the invention

Technical barrier to be solved by this invention is a kind of drawing die of design; It has reduced the frictional force of sheet material and stretching die; Reduced mass defects such as the pulling of material, scratch, avoided sheet material to pull open the generation of situation simultaneously, can also realize that the mould of similar drawn products exchanges fast.

In order to solve above-mentioned technical barrier; The present invention designed the flexible drawing die of a kind of modular, a kind of it comprise part of the upper die and part of the lower die, the part of the upper die comprises die shank, upper bolster, backing plate, punch retainer, punch, blank holder; Die shank is contained on the upper bolster; Upper bolster, backing plate and punch retainer are fixed together, and punch is contained on the punch retainer, the discharging screw according to gap fiting mode pass upper bolster, backing plate and punch retainer successively, blank holder is locked on the discharging screw; Between punch retainer and the blank holder brute spring is housed, guide plate also fixedly is housed on the upper bolster;

The part of the lower die comprises concave template, die mold insert, die shoe, die pad, base; The die mold insert is contained in the die mold insert hole; Concave template and die mold insert are fixed on the die shoe, and die shoe is supported on the base through support column, and die pad is contained in the die mold insert forming cavity; Be connected through push rod with the nitrogen spring that is fixed between die shoe and the base, with last guide plate correspondence position lower guide plate be housed fixedly also on the die shoe;

It is characterized in that: said die mold insert is to be formed by holder combination, and roll sleeve is equipped with in stretch forming place of support, and roller bearing is housed in the roll sleeve.

Said punch passes the punch via hole on the blank holder, and blank holder was than the high 0.5～1mm of punch when mould was in folding condition.

Said backing plate and punch retainer are located on upper bolster with pin.

Said concave template and die mold insert are located on die shoe with pin.

The beneficial effect that the technical scheme that the present invention designed obtains is when punch is pressed into sheet material in the die forming cavity after sheet material is pushed down by blank holder; Sheet material is rolling friction on roll sleeve; Mass defects such as the pulling of material, scratch have been reduced; Prevent what material from being pulled open, need simultaneously only to change a die mold insert similar drawn products that just can be shaped.

Description of drawings

Accompanying drawing 1 is a structural representation of the present invention.

Accompanying drawing 2 is that die mold insert of the present invention is overlooked the direction sketch map.

Wherein, 1, die shank 2, upper bolster 3, backing plate 4, punch retainer 5, punch 6, blank holder 7, discharging screw 8, brute spring 9, go up guide plate 10, concave template 11, die mold insert 1101, support 19, roll sleeve 1901, roller bearing 12, die shoe 13, die pad 14, base 15, support column 16, nitrogen spring 17, push rod 18, lower guide plate

The specific embodiment

Below in conjunction with accompanying drawing and embodiment, the present invention is done further elaboration.

As attach shown in Fig. 1 and 2, material is pulled open or the wrinkling drawback that influences product appearance in the drawing process in order to reduce, and the maintenance efficient of mould is provided simultaneously; Design the flexible drawing die of a kind of modular; It comprises part of the upper die and part of the lower die, and the part of the upper die comprises die shank 1, upper bolster 2, backing plate 3, punch retainer 4, punch 5, blank holder 6, and die shank 1 is contained on the upper bolster 2; Upper bolster 2, backing plate 3 and punch retainer 4 are fixed together, and with the pin location; Punch 5 is contained on the punch retainer 4; Discharging screw 7 according to gap fiting mode pass upper bolster 2, backing plate 3 and punch retainer 4 successively, blank holder 6 is locked on the discharging screw 7; Between punch retainer 4 and the blank holder 6 brute spring 8 is housed; Guide plate 9 also fixedly is housed on the upper bolster 2, for blank holder 6 is pushed down sheet material earlier than punch, mould when folding condition blank holder 6 than punch 5 high 0.5～1mm.

The part of the lower die comprises concave template 10, die mold insert 11, die shoe 12, die pad 13, base 14, and die mold insert 11 is contained in the die mold insert hole, and concave template 10 is fixed on the die shoe 12 with die mold insert 11, and with the pin location; Die shoe 12 is supported on the base 14 through support column 15; Die pad 13 is contained in die mold insert 11 forming cavity; Be connected through push rod 17 with the nitrogen spring 16 that is fixed between die shoe 12 and the base 14, with last guide plate 9 correspondence positions lower guide plate 18 be housed fixedly also on the die shoe 12.Wherein, said die mold insert 11 is to be combined by support 1101, and roll sleeve 19 is equipped with in stretch forming place of support 1101, and roller bearing 1901 is housed in the roll sleeve 19.

The course of work of the present invention is to be contained on the forcing press after the mould assembling is accomplished; Forcing press is descending, and the part of the upper die is moved downwards, and blank holder 6 moves downward pushes down sheet material; Punch continues to move downward; Sheet material inflow die mold insert 11 internal shapings that under the effect of roll sleeve, rolling, punch makes die pad 13 move downward downwards, the nitrogen in the compressed nitrogen spring.After stretch forming is accomplished, the forcing press rollback, the part of the upper die moves upward; Nitrogen spring begins to promote the head part flitch to be released the product that is shaped in the die mold insert 11, accomplishes whole stretching overall process and since sheet material when contact in inflow die mold insert 11 processes with roll sleeve in the part of the lower die with roll sleeve rolling contact; So what receive is force of rolling friction; This modular flexible structure has reduced the frictional force of sheet material and stretching die, has reduced mass defects such as the pulling of material, scratch, has avoided sheet material to pull open the generation of situation simultaneously; The mould that can also realize similar drawn products exchanges fast, has improved mold repair maintenance efficient and has reduced production cost.

Claims

1. the flexible drawing die of a modular; It comprises part of the upper die and part of the lower die; The part of the upper die comprises die shank (1), upper bolster (2), backing plate (3), punch retainer (4), punch (5), blank holder (6), and die shank (1) is contained on the upper bolster (2), and upper bolster (2), backing plate (3) and punch retainer (4) are fixed together; Punch (5) is contained on the punch retainer (4); Discharging screw (7) according to matched in clearance side pass upper bolster (2), backing plate (3) and punch retainer (4) successively, blank holder (6) is locked on the discharging screw (7), between punch retainer (4) and the blank holder (6) brute spring (8) is housed, and guide plate (9) also fixedly is housed on the upper bolster (2);

The part of the lower die comprises concave template (10), die mold insert (11), die shoe (12), die pad (13), base (14); Die mold insert (11) is contained in the die mold insert hole; Concave template (10) and die mold insert (11) are fixed on the die shoe (12); Die shoe (12) is supported on the base (14) through support column (15); Die pad (13) is contained in die mold insert (11) forming cavity, is connected through push rod (17) with the nitrogen spring (16) that is fixed between die shoe (12) and the base (14), and die shoe (12) is gone up with last guide plate (9) correspondence position lower guide plate (18) also fixedly is housed;

It is characterized in that: said die mold insert (11) is to be combined by support (1101), and roll sleeve (19) is equipped with in stretch forming place of support (1101), and roller bearing (1901) is housed in the roll sleeve (19).

2. the flexible drawing die of a kind of modular as claimed in claim 1, it is characterized in that: said punch (5) passes the punch via hole on the blank holder (6), and blank holder when mould is in folding condition (6) is than the high 0.5～1mm of punch (5).

3. the flexible drawing die of a kind of modular as claimed in claim 1, it is characterized in that: said backing plate (3) and punch retainer (4) are gone up the location with pin at upper bolster (2).

4. the flexible drawing die of a kind of modular as claimed in claim 1, it is characterized in that: said concave template (10) and die mold insert (11) are gone up the location with pin at die shoe (12).