CN201195411Y

CN201195411Y - Thin material blanking mould with prepressurization stress

Info

Publication number: CN201195411Y
Application number: CNU2008201198081U
Authority: CN
Inventors: 曹永清
Original assignee: Inner Mongolia First Machinery Group Corp
Current assignee: Inner Mongolia First Machinery Group Corp
Priority date: 2008-05-27
Filing date: 2008-05-27
Publication date: 2009-02-18
Anticipated expiration: 2018-05-27

Abstract

The utility model relates to a thin material blanking die with pre-compressive stress, which comprises an upper die holder, a male die, a striping device, a female die, a pressure plate, a male-female die and a lower die holder. The male die is mounted on the upper die holder, a buffer spring is arranged between the male die and the upper die holder, the female die is sleeved on the male die and is fixed with the upper die holder, and the female-male die is mounted on the lower die holder. The thin material blanking die is characterized in that the periphery of the die cavity of the female die is provided with grooves, embossments are arranged on the pressure plate, the grooves on the female die are engaged with the embossments on the pressure plate during the punching, and simultaneously a cutting edge of the male die is manufactured into a small round corner. The utility model has the advantages that burr and local deformation defects of thin parts after blanking can be eliminated by utilizing the thin material blanking die in blanking, the utility model has low requirements on dies and presses, and thin parts of large dimension can be produced on a small-sized press, thereby basically eliminating the burr, and prolonging the service life of the dies.

Description

The thin material blanking die of band pre-compression stress

Technical field:

The utility model relates to a kind of thin material blanking die with pre-compression stress, belongs to the blanking die field.

Background technology:

Material thickness is burr and local deformation in the major defect that 0.3 millimeter thin plate is easy to generate in the stamping-out process, and this defective does not allow to exist often.Thin at present material blanking method mainly contains: no gap stamping-out; Polyurethane pad blanking; The kirsite stamping-out; Powerful binder stamping-out or the like, and all there is the problem of the jagged and local deformation of part behind the stamping-out in these methods, not having gap stamping-out, polyurethane pad blanking, kirsite stamping-out and powerful binder stamping-out in addition has relatively high expectations to forcing press and mould and die accuracy, and do not have gap blanking die cost height, die life is low.

Summary of the invention:

The purpose of this utility model provides a kind of band pre-compression stress blanking die of (having convex annular stalk structure), this mould can suppress protruding stalk on plate before the stamping-out action, thereby the thin-material part that stamping-out is gone out reaches the purpose of no local deformation and no burr stamping-out.

The purpose of this utility model is achieved through the following technical solutions:

The utility model comprises: upper bolster, formpiston, the inloading part device, former, holding pad, matched molds and die shoe, formpiston is contained on the upper bolster, between formpiston and upper bolster, buffer spring is arranged, former is sleeved on the formpiston and with upper bolster and fixes, matched molds is contained on the die shoe, between matched molds and die shoe, buffer spring is arranged, the die cavity of matched molds is corresponding with the die cavity of former, holding pad is sleeved on the matched molds and with die shoe and fixes, between holding pad and die shoe, buffer spring is arranged, it is characterized in that: the die cavity periphery of former is provided with groove on former, on holding pad, be provided with projection, groove during punching press on the former and the projection on the holding pad match, and the formpiston cutting edge is made little fillet simultaneously.

The utility model has the advantages that: adopt the thin material blanking die of band pre-compression stress to carry out stamping-out, can eliminate the burr and the local deformation defect of thin-material part behind the stamping-out, and it is all very low to the requirement of mould and forcing press, and the tonnage demand to forcing press is not high yet, can be on baby press the big thin-material part of production size, and has only a high rigidity part (matched molds) on the mould, and the blade clearance is bigger, fundamentally eliminated again and gnawed the cutting edge phenomenon, prolonged the service life of mould.

Description of drawings:

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the I portion enlarged drawing of Fig. 1.

The specific embodiment:

Below in conjunction with accompanying drawing the utility model is described further:

With reference to accompanying drawing, mould structure of the present utility model as shown in Figure 1, it comprises upper bolster 1, formpiston 2, inloading part device 3, former 4, holding pad 5, matched molds 6 and die shoe 7, the die cavity periphery of former is provided with groove 9 on former, be provided with projection 10 on holding pad 5, groove 9 during punching press on the former and the projection 10 on the holding pad match.Lathe is when work, upper bolster 1 and die shoe 7 are connected and fixed with the lathe forcing press, sheet bar 8 is when lathe forcing press matched moulds, blank is under holding pad 5 and former 4 effects, taking place to suppress protruding stalk before the stamping-out action, after the mould of the protruding stalk of band moulding entered impulse stroke, beginning was the plastic deformation stage, all produces the angle of significantly collapsing on part and waste material; When the degree of depth that is advanced into former 6 under formpiston 2 continuation constantly increases, the tension of material increases rapidly in the die clearance, this moment is because protruding stalk has limited flowing of material, material can not enter the gap, matched molds keen edge two layers of material pulling force produced makes a concerted effort cutting edge is produced very big extruding force, keen edge just begins to clamp-on metal generation fine fisssure when this extrusion stress reaches certain value, and the direction of this micro-crack is consistent with the direction of making a concerted effort; Increasing along with the stamping-out stroke, make the material at cutting edge place reach the condition of brittle fracture rapidly, material continues cracking along direction of check, last part separates with waste material, because formpiston cutting edge 11 is made little fillet, and plate separates along the mould keen edge direction of extrusion, so burr is only stayed on the waste material, thereby realized the no burr stamping-out of thin-material part, final stamping-out goes out not have burr is not had the part that the angle of collapsing does not have local deformation.

Claims

1. thin material blanking die with pre-compression stress, comprise: upper bolster, formpiston, the inloading part device, former, holding pad, matched molds and die shoe, formpiston is contained on the upper bolster, between formpiston and upper bolster, buffer spring is arranged, former is sleeved on the formpiston and with upper bolster and fixes, matched molds is contained on the die shoe, between matched molds and die shoe, buffer spring is arranged, the die cavity of matched molds is corresponding with the die cavity of former, holding pad is sleeved on the matched molds and with die shoe and fixes, between holding pad and die shoe, buffer spring is arranged, it is characterized in that: the die cavity periphery of former is provided with groove on former, be provided with projection on holding pad, groove during punching press on the former and the projection on the holding pad match, and the formpiston cutting edge is made little fillet simultaneously.