CN201659244U

CN201659244U - Die forging mold

Info

Publication number: CN201659244U
Application number: CN2010201475452U
Authority: CN
Inventors: 刘刚; 董锦荣; 黄明兴; 牟承兵
Original assignee: Zhejiang Zhengchang Forging Co Ltd
Current assignee: Zhejiang Zhengchang Forging Co Ltd
Priority date: 2010-03-10
Filing date: 2010-03-10
Publication date: 2010-12-01
Anticipated expiration: 2020-03-10

Abstract

The utility model discloses a die forging mold which comprises an upper mold and a lower mold; the punch of the upper mold is opposite to the orifice of the lower mold; the mold is characterized in that the excircle of the punch is provided with a movable sheath; the inner hole of the sheath is matched with the excircle of the punch in a sliding way; the sheath is connected on the upper mold through an elastic device; and when contacting, the lower end surface of the sheath and a plane at the orifice of the lower mold can be mutually sticky levelly and tightly. The die forging mold adopts a net near formation forging technology, forgings produced by the mold basically do not have redundant trimmings, the material utilization rate can be up to 99.5 percent, not only raw materials are saved, but also the forgings can be obtained directly through cold deformation, and the energy is saved. The technical scheme breaks through the restriction that the upset ratio of once-through forging formation cannot be more than 3, and the service life of the mold is long.

Description

A kind of stamp forging mould

[technical field]

The utility model relates to a kind of stamp forging mould.

[background technology]

For forging some elongated parts, as a kind of high load capacity power on/off plug that is used for power distribution cabinet, material is the T2 red copper, dimension precision requirement height, blemish such as the surface do not allow any crackle, folding, cut, collide with.If adopt common open die forging, impressing forging technology, utilization rate of raw materials is low so, and folding and thickness direction size instability may appear in the surface; If adopt common open type jumping-up technology, the blank that is exposed at counterdie die cavity outside so can move down along with patrix, and produce serious crooked, especially for upset ratio greater than 3 the forging of (upset ratio be meant the bar length that is exposed at counterdie die cavity outside and the ratio of bar diameter), must just can carry out forging molding with multiple tracks jumping-up operation, person's bar can not produce serious bending and cause the moulding failure when shaping and deformation.

[summary of the invention]

In view of the problem of present known technology existence, but the technical problems to be solved in the utility model is to be to provide a kind of energy-conservation joint material disposal molding upset ratio greater than 3 forging, the stamp forging mould of long service life.

For solving the problems of the technologies described above, the utility model takes following technical scheme to finish:

A kind of stamp forging mould, comprise upper die and lower die, the drift of patrix and the die orifice of counterdie over against, it is characterized in that: the cylindrical of described drift is provided with movable sheath, the endoporus of sheath and the cylindrical of drift are slidingly matched, sheath is connected on the patrix by elastic device, can develop mutually and be adjacent to during the plane contact at the lower surface of sheath and counterdie die orifice place.The mold cavity volume of described counterdie is less than the volume of forging.

Common forging molding is to finish deformation process by the upper die and lower die extrusion billet, and the technical solution of the utility model is: during forging molding, the sheath of patrix down moves with patrix, sheath at first entangles the bar that is exposed at counterdie die cavity outside, but not extruded bar stock, along with moving down of patrix, sheath is adjacent to the plane at counterdie die orifice place under the effect of elastic device and stops to move downward, this moment, bar was by sheath endoporus and the sealing of counterdie die cavity, and patrix continues to move downward, the drift of patrix is pushing away bar in sheath downward, and till bar was squeezed to the counterdie die orifice, deformation process finished.The above-mentioned forming process that the utility model is realized, bar be in closed state all the time when distortion, thus the moulding upset ratio greater than 3 situation under, bar can not produce bending yet, solved prior art can not the one-shot forming upset ratio greater than 3 technical bottleneck.Simultaneously, the utility model directly obtains forging by cold deformation, saves the energy; Mould of the present utility model is according to clean nearly forming technique design, and the mold cavity volume of counterdie is slightly smaller than the volume of forging, so the forging after forging does not produce unnecessary burr and few machining allowance substantially, stock utilization reaches 99.5%, saves raw material.Also have, because the utility model forming process is that jumping-up is full of, so minimum to the wearing and tearing of mould, die life is very long.

In sum, but the energy-conservation joint material of the utility model disposal molding upset ratio compared with prior art, has substantive distinguishing features and progress greater than 3 forging, long service life.

[description of drawings]

The utility model has following accompanying drawing:

Fig. 1 is the structural representation before the utility model moulding

Fig. 2 is the structural representation in the utility model forming process

Structural representation when Fig. 3 finishes for the utility model moulding

[specific embodiment]

Accompanying drawing has been represented the technical solution of the utility model and embodiment, further describes each relevant details and operation principle thereof of embodiment below more in conjunction with the accompanying drawings.

With reference to accompanying drawing 1, this kind stamp forging mould, comprise upper die and lower die 9, patrix comprises fixedly connected cope match-plate pattern 1, drift pressing plate 2 and drift fixed head 3, drift 6 is fixed on the patrix by drift fixed head 3, the cylindrical of described drift 6 is provided with movable sheath 7, the cylindrical of the endoporus of sheath 7 and drift 6 is slidingly matched, fit clearance is 0.02mm to 0.03mm, sheath 7 is fixedlyed connected with sheath retainer plate 8, sheath retainer plate 8 can slide up and down and be located on the guide pillar 4, and guide pillar 4 is fixed on the drift fixed head 3, is provided with spring 5 between sheath retainer plate 8 and the drift fixed head 3.Described counterdie 9 is fixed on the lower bolster 14 by counterdie trim ring 12, counterdie 9 has the die cavity of placing blank bar 10, the volume that the mold cavity volume of counterdie is slightly smaller than forging is no more than 0.05%, and the bottom of counterdie 9 die cavities is provided with movable push rod 11, and the bottom of push rod 11 is provided with secondary fore-set 13; The drift 6 of described patrix and the die orifice of counterdie 9 (outlet of counterdie die cavity) over against, can develop mutually and under the effect of described spring 5, be adjacent to mutually during the plane contact at the lower surface of sheath 7 and counterdie 9 die orifice places.Shown in Fig. 1, the high load capacity power on/off plug that is used for power distribution cabinet that this stamp forging mould forged, the diameter of its blank bar 10 is 21mm, length overall is 312mm, the length that is exposed at counterdie 9 die cavities outside is 109mm, upset ratio during distortion is 109/21=5.19, and the volume that the volume of blank bar is a bit larger tham the counterdie die cavity is no more than 0.05%.

Forming process of the present utility model is such: with reference to accompanying drawing 2, during forging molding, the sheath of patrix down moves with patrix, sheath at first entangles the bar that is exposed at counterdie die cavity outside, but not extruded bar stock, along with moving down of patrix, the lower surface of sheath is adjacent to the plane at counterdie die orifice place under the effect of spring and stops to move downward, this moment, bar was by sheath endoporus and the sealing of counterdie die cavity, and patrix continues to move downward, and the drift of patrix is pushing away bar in sheath downward, till bar is squeezed to the counterdie die orifice (with reference to accompanying drawing 3), deformation process finishes, and this moment, the forging of gained did not just produce unnecessary burr substantially.

Claims

1. stamp forging mould, comprise upper die and lower die (9), the die orifice of drift of patrix (6) and counterdie (9) over against, it is characterized in that: the cylindrical of described drift (6) is provided with movable sheath (7), the cylindrical of the endoporus of sheath (7) and drift (6) is slidingly matched, sheath (7) is connected on the patrix by elastic device, can develop mutually and be adjacent to during the plane contact at the lower surface of sheath (7) and counterdie (9) die orifice place.

2. a kind of stamp forging mould as claimed in claim 1 is characterized in that: the mold cavity volume of described counterdie (9) is less than the volume of forging.