CN201423391Y

CN201423391Y - Precision cold extrusion combined cavity die for perforation shell case roughcast

Info

Publication number: CN201423391Y
Application number: CN2009201082408U
Authority: CN
Inventors: 张铁峰; 张立波; 尹立辉
Original assignee: Yantai Shougang Dongxing Group Co Ltd
Current assignee: Yantai Shougang Dongxing Group Co Ltd
Priority date: 2009-05-21
Filing date: 2009-05-21
Publication date: 2010-03-17
Anticipated expiration: 2019-05-21

Abstract

A precision cold extrusion combined cavity die for a perforation shell case roughcast comprises a cavity die upper body, a cavity die lower body, and a backward extrusion diversion platform arranged on the upper surface of the cavity die lower body, therefore the precision cold extrusion combined cavity die for perforation shell case roughcast with long service life and high finished product qualification rate is provided.

Description

A kind of perforation shell case blank precise cold extrusion and combination die

Technical field

The utility model relates to a kind of mould, and is particularly a kind of to the accurate cold-stamped combined die of perforation shell case blank.

Background technology

To workpiece blank cold working the time, often adopt cold extruding technique, and the concavo-convex mould of supporting use.Referring to Fig. 1, Fig. 2, existing die 3 ' adopts the one design, puts into shell case blank 2 ' in die body 3 ', the end, dashes 4 ' and props up shell case blank 2 ', when body of punch 1 ' pushes downwards, cause the stress of die 3 ' stress raiser 5 ' to discharge easily and rupture, make its service life short; And in extrusion process, cause inclined to one side extruding easily, wall thickness deviation is excessive, makes that the wall unevenness of shell case blank is even, and product qualified rate is low.

The utility model content

At the defective of above-mentioned prior art, the purpose of this utility model provides a kind of die long service life, the perforation shell case blank precise cold extrusion and combination die that product qualified rate is high.

For achieving the above object, the utility model adopts following technical scheme:

A kind of perforation shell case blank precise cold extrusion and combination die comprises die upper body, die lower body, and the upper surface of die lower body is provided with the anti-metal diversion platform that squeezes.

Perforation shell case blank precise cold extrusion and combination die of the present utility model, the wherein said anti-width of metal diversion platform that squeezes is less than 1.5mm.

Because the die stress raiser is the junction of die upper body and die lower body, the metal that extruding is come out is discharged into anti-squeezing on the metal diversion platform, thereby the stress that makes generation obtains discharging, prolong the service life of die, the anti-simultaneously metal that squeezes on the metal diversion platform has guaranteed when processing column face and lower cone face, intersection has enough allowance, has improved the qualification rate of processed finished products, and makes extruding finished product wall thickness difference less than 0.3mm.

Description of drawings

Fig. 1 is the structure chart of prior art perforation shell case blank precise cold extrusion die;

Fig. 2 is a prior art perforation shell case blank precise cold extrusion die die stress raiser structural representation;

Fig. 3 is the structure chart of a kind of perforation shell case of the utility model blank precise cold extrusion and combination die;

Fig. 4 is that a kind of perforation shell case of the utility model blank precise cold extrusion and combination die stress raiser instead squeezes metal diversion platform structural representation.

The specific embodiment

Be elaborated below in conjunction with the embodiment of accompanying drawing to a kind of perforation shell case of the utility model blank precise cold extrusion and combination die.

Referring to Fig. 3, Fig. 4, perforation shell case blank precise cold extrusion die comprises body of punch 1 and die body, die body comprises die upper body 3a and die lower body 3b, the internal diameter of die upper body 3a is greater than the internal diameter of die lower body 3b upper surface, thereby form the anti-metal diversion platform 6 that squeezes of metal, the anti-width that squeezes metal diversion platform 6 is less than 1.5mm, with die upper body 3a, die lower body 3b and body of punch 1 and the end, dash 4 and be used when pushing shell case blank 2, because die stress raiser 5 is the junction of die upper body 3a and die lower body 3b, in extrusion process, the metal that extruding is come out is discharged into anti-squeezing on the metal diversion platform 6, be the metal that extruding comes out diversion space is provided, thereby discharged the service life of heavily stressed prolongation die, 3000/original dies have been brought up to 30000/more than the die; In use, die upper body 3a and die lower body 3b are put into die sleeve, because in design, the area of the outer surface of die upper body 3a is increased, increased frictional force, prevent to move on the 3a of die upper body; The anti-metal diversion platform 6 that squeezes has guaranteed simultaneously when processing column face and lower cone face, intersection has enough allowance, promptly have more a part of metal anti-squeezing on the metal diversion platform, assurance has enough metals to process, improved the qualification rate of processed finished products, and made extruding finished product wall thickness difference less than 0.3mm.

Above embodiment is described preferred implementation of the present utility model; be not that scope of the present utility model is limited; under the prerequisite that does not break away from the utility model design spirit; various distortion and improvement that the common engineers and technicians in this area make the technical solution of the utility model all should fall in the definite protection domain of claims of the present utility model.

Claims

1. a perforation shell case blank precise cold extrusion and combination die is characterized in that, comprises die upper body (3a), die lower body (3b), and the upper surface of die lower body (3b) is provided with the anti-metal diversion platform (6) that squeezes.

2. perforation shell case blank precise cold extrusion and combination die according to claim 1 is characterized in that, the described anti-width of metal diversion platform (6) that squeezes is less than 1.5mm.