CN201394613Y

CN201394613Y - Trimming punching die with large shearing force

Info

Publication number: CN201394613Y
Application number: CN2009201264529U
Authority: CN
Inventors: 罗国文
Original assignee: Lianwei Automobile Part (chongqing) Co Ltd
Current assignee: CHONGQING PINGWEI AUTOMOBILE TECHNOLOGY CO., LTD.
Priority date: 2009-02-24
Filing date: 2009-02-24
Publication date: 2010-02-03
Anticipated expiration: 2019-02-24

Abstract

The utility model provides a trimming punching die of large-sized structure piece, which comprises an upper die, a lower die, a stripper plate, trimming punching convex and concave dies and a buffer device, and changes a polyurethane buffer cushion into a nitrogen cylinder aiming to overcome the structure defects of the die, wherein the nitrogen cylinder is arranged on the four corners of the lower die, a buffer cushion block is arranged on a corresponding position of the upper die, and generally is HRC55-60. In order to guarantee enough pressure when the die is trimmed and punched, the nitrogen cylinder can not be designed too high, and the height of the nitrogen cylinder generally is guaranteed to be higher 5-10mm than the height of the trimming punching convex and concave dies when contacting. The nitrogen cylinder is fixed on the lower die by a fixed block and a fixed cushion block through bolts. The trimming punching die of a large-sized structure piece has the advantages of increasing the buffer ability of the die, reducing the compact to the die, improving the working environment, and increasing the life of the die under the action of large shearing force.

Description

A kind of edge-cutting and hole-punching mould of big shearing force

Technical field

The utility model belongs to the sheet forming technology, is specifically related to a kind of mould structure.

Background technology

Development along with automobile industry, people are also more and more higher to the requirement of automotive performance, especially its collision safety performance, the performance of the large-sized structural parts of automobile force part is the key factor that influences vehicle safety performance, high-intensity material is not only arranged, and possessing bigger thickness (1.5-2.5mm) again, the condition of this two aspect can increase the security performance of automobile greatly, satisfies client's demand.But also there is following difficult point at present in the manufacturing moulding of large-sized structural parts:

1, briquetting pressure is big, to the requirement height of lathe and mold materials;

2, molding simulation is inaccurate, and the on-the-spot X factor influence that exists is complicated, the poor practicability as a result that simulation softward provides;

3, working environment is relatively poor, and noise is big;

4, make the closed part that draws, its drawing depth is limited;

5, be subjected to the restriction of working environment the service life of mould.

According to the applicant to the edge-cutting and hole-punching mould of existing large-sized structural parts discover that in traditional edge-cutting and hole-punching mould, often adopt the descending impulsive force of polyurethane buffering patrix, as shown in Fig. 1 and Fig. 2,1 is patrix among the figure, the 8th, counterdie, the 10th, polyurethane.The shortcoming of this structure is: the cushion effect that polyurethane can bear is less, load stability is poor.Under the big shearing force effect that the edge-cutting and hole-punching of large-sized structural parts produces, the descending impulsive force that produces of mould can not be alleviated fully, produces bigger noise, and aggravating working environment causes the life-span of mould to seriously influence.Adopt better mold materials die life for improving, increased the manufacturing expense and the debugging cycle of edge-cutting and hole-punching mould then.

Summary of the invention

The purpose of this utility model is the deficiency at the prior art existence, a kind of improvement structure is proposed, be used for the edge-cutting and hole-punching mould that large-sized structural parts has big shearing force, make it under bigger shearing force effect, increase the buffer capacity of mould, minimizing improves working environment to the impact of mould, improves die life.

The technical solution adopted in the utility model is as follows:

A kind of edge-cutting and hole-punching mould of large-sized structural parts, described mould includes that upper die and lower die, stripper and edge-cutting and hole-punching are protruding, die and buffer unit, in order to overcome the deficiency of existing mold structure, change the polyurethane buffering pad into the nitrogen cylinder, the nitrogen cylinder is installed on four angles of counterdie, in the patrix corresponding position cushion pad is installed, is generally HRC55-60, nitrogen cylinder and cushion pad promptly constitute buffer unit.Has enough pressure during for assurance mould edge-cutting and hole-punching, the nitrogen cylinder can not design De Taigao, usually guarantee that height when the nitrogen cylinder is unloaded is protruding a little more than edge-cutting and hole-punching, the 5-10mm of the height during the die contact or when mould ran to bottom dead centre, the punch cutting edge was lower than cutting edge of die 3-5mm.The nitrogen cylinder with screw by fixed block and fixedly cushion block be fixed on the counterdie.

Simultaneously, in order to adjust the height of nitrogen cylinder according to actual conditions, be provided with the adjustment pad between cushion pad and patrix, adjusting pad is the multi-disc that supporting preparation has different-thickness, to use according to actual needs, plays the purpose of adjusting nitrogen cylinder height.

As seen, the outstanding architecture advances of the utility model is embodied in following two aspects:

1, traditional polyurethane is changed into nitrogen cylinder and being fixed on the counterdie, descending along with patrix, the nitrogen cylinder contacts with patrix, make the descending buffering that obtains of mould, reduce the impact of upper and lower mould, and the decrement of nitrogen cylinder reaches maximum in bottom dead centre, the cushion effect maximum, thus reach the purpose of buffering.

2, the height of nitrogen cylinder is too high, and patrix contacts with the nitrogen cylinder prematurely, and shearing force is reduced, and part can't cut easily; Too low, with patrix contacted evening, decrement is little, and buffering effect is poor.Therefore between cushion pad and upper bolster, be embedded with adjustable for height pad, when die trial, can make the height of nitrogen cylinder reach optimal value by adjusting pad quantity.Difficulty and cycle when the use of pad can reduce die trial greatly.Can rapid adjustment pad quantity when die trial, thus the height of nitrogen cylinder changed, finally can contrast the part quality various height under, thereby reach fast preferably result.

This mould mainly is applicable to the edge-cutting and hole-punching of large-sized structural parts, can reduce the impulsive force of mould, improves die life.

Description of drawings

Fig. 1 and Fig. 2 are the structural representation of now general edge-cutting and hole-punching mould.

Fig. 3 is the structural representation of this edge-cutting and hole-punching mould.

Fig. 4 is the primary structure schematic diagram of wherein nitrogen cylinder buffer locations.

Fig. 5, Fig. 6 and Fig. 7 are this mould motion state schematic diagram.

The specific embodiment

Referring to Fig. 3 and Fig. 4: this edge-cutting and hole-punching mould includes patrix 1, counterdie 8, stripper 11 and edge-cutting and hole-punching is protruding, die etc., be provided with drift, side cut cutting edge, spring, side and be provided with side guide 9 on patrix 1, the below is provided with parts such as the dead piece of pier, cushion pad.Nitrogen cylinder 7 is fixed on four angles of counterdie 8, its top adopt screw 6 by fixed block 4 and fixedly cushion block 5 be connected and fixed with counterdie 8, in patrix 1 corresponding position cushion pad 3 is installed, be provided with between cushion pad 3 and patrix 1 and adjust pad 2, the decrement of nitrogen cylinder 7 can be regulated by adjusting pad 2.The height of nitrogen cylinder is controlled at when mould runs to bottom dead centre, and the punch cutting edge is lower than cutting edge of die 3-5mm.

Below be to utilize above-mentioned edge-cutting and hole-punching mould large-sized structural parts to be carried out the method for edge-cutting and hole-punching:

The first step: determine the setting height(from bottom) of nitrogen cylinder according to the size of shearing force, adjust the height of nitrogen cylinder, at last they are fixed up by selecting suitable adjustment pad.

Second step: plate is put on the counterdie, patrix is moved downward, go downwards to certain position after, patrix contacts with the nitrogen cylinder earlier, behind the descending again 5-10mm, protruding, the cutting edge of die of edge-cutting and hole-punching all touch plate.

The 3rd step: along with the continuation of patrix is descending, finish the edge-cutting and hole-punching to material, the nitrogen cylinder of compression applies reverse active force to patrix, and when mould ran to bottom dead centre, it is maximum that the decrement of nitrogen cylinder reaches, to the cushioning effect of mould also maximum.

Fig. 5: when mould moved downwards, the nitrogen cylinder was the unloaded effect that does not have buffering.

Fig. 6: patrix continues to move down; holding pad (also can be described as stripper) is pushed down workpiece; holding pad stop motion this moment; the descending space that provides of spring boil down to mould above the pressured flitch; the nitrogen cylinder contacts with the patrix cushion pad; edge-cutting and hole-punching is protruding, at a distance of 5-10mm, the nitrogen cylinder plays the obstruction cushioning effect to the descending active force of patrix to die approximately.

Fig. 7: the decrement of nitrogen cylinder reached maximum when mould arrived bottom dead centre, and patrix is played maximum cushioning effect.Reduce the impulsive force of mould, reduce noise, improve die life.

Claims

1, the edge-cutting and hole-punching mould that a kind of shearing force is bigger, described mould includes patrix (1), counterdie (8), stripper (11) and edge-cutting and hole-punching is protruding, die and buffer unit, it is characterized in that described buffer unit includes nitrogen cylinder (7) and cushion pad (3), described nitrogen cylinder (7) is installed on four angles of counterdie, and cushion pad (3) is installed in the patrix corresponding position; Height when the height of nitrogen cylinder (7) is controlled at zero load is protruding a little more than edge-cutting and hole-punching, the 5-10mm of the height when die contacts, or when mould ran to bottom dead centre, the punch cutting edge was lower than cutting edge of die 3-5mm.

2, the edge-cutting and hole-punching mould that shearing force according to claim 1 is bigger is characterized in that, is provided with to adjust pad (2) between described cushion pad (3) and patrix (1), adjusts the supporting multi-disc that the equal and opposite in direction different-thickness is arranged of pad (2).

3, the edge-cutting and hole-punching mould that shearing force according to claim 1 and 2 is bigger is characterized in that, described nitrogen cylinder (1) with screw (6) by fixed block (4) and fixedly cushion block (5) be fixed on the counterdie (8).