CN201076897Y

CN201076897Y - Counter-die of integral closed flash forging die

Info

Publication number: CN201076897Y
Application number: CNU2007200254183U
Authority: CN
Inventors: 赵国群; 程联军
Original assignee: Shandong University
Current assignee: Shandong University
Priority date: 2007-07-18
Filing date: 2007-07-18
Publication date: 2008-06-25
Anticipated expiration: 2017-07-18

Abstract

The utility model provides a bottom die for a wholly enclosed flash forging die, comprising a die body, a die cavity and a knockout pin. The utility model is characterized in that, the die cavity is arranged at the inner upper part of the die body; the knockout pin is arranged in a knockout pin hole at the bottom of the die body; the knockout pin hole is communicated with the die cavity; an extrusion container with wholly enclosed periphery is arranged at the upper part of the die cavity. The utility model has the advantages of low cost, good quality of forged pieces and other advantages; during the preforging forming process of mechanical parts, wholly enclosed flash exists at the periphery of preforging pieces; the enclosed flash produces resistance to force metal to fully fill the die cavity of the die; during forming process, the resistance of the flash is increased, and the capacity of the metal to fill the die cavity is improved.

Description

A kind of integrally closed overlap forge mould counterdie

Technical field

The utility model relates to a kind of forging mold that can produce the sealing overlap, belongs to technical field of mold.

Background technology

Complex structure, the machine components that intensity, toughness, mechanical property and dimension precision requirement are high such as the bracket of back axle of automobile adopt forging mold production usually, the Forging Technology difference, the forging mold structure of employing also is not quite similar.Present Forging Technology has open type Forging Technology and closed-die forging technology, in the open type Forging Technology, forging mold is provided with flash gutters, and flash gutters is open, and the forging process forging produces overlap, and overlap plays the effect that impels the filled with metal die cavity, but be difficult to realize that a fire forges, promptly only need once just can finish whole forging process to blank heating, and stock utilization is low, forging quality is poor; In the closed-die forging technology, forging mold does not have flash gutters, forging directly is shaped in the die cavity of sealing in the forging process, do not produce overlap, the forging quality of closed-die forging and stock utilization height, but to prefabricated blank, forging temperature control and prefabricated blank required precision height, need special-purpose forging equipment, investment is high, and die cost height, life-span are low simultaneously, overall manufacturing cost height.

Summary of the invention

At the deficiency that existing open type is forged and the closed-die forging mould exists, the utility model provides the integrally closed overlap forge mould that a kind of cost is low, forging quality is good counterdie.

Integrally closed overlap forge mould counterdie of the present utility model comprises die body, die cavity and push rod, and the internal upper part of die body is provided with die cavity, and push rod is installed in the bottom jogger hole of die body, and jogger hole is communicated with die cavity, and die cavity top is provided with the recipient of peripheral integrally closed.

The utlity model has advantages such as cost is low, forging quality is good.Make in the machine components blocking forming process pre-forging periphery have the overlap of integrally closed, the overlap that is closed produces resistance, forces the full mold cavity of filled with metal, and forming process has increased the overlap resistance, has improved the ability of filled with metal die cavity.

Description of drawings

Accompanying drawing is a forging mold structural representation of the present utility model.

Wherein: 1, die body, 2, die cavity, 3, push rod, 4, recipient.

The specific embodiment

The Forging Technology that comprises components of machine such as bracket of back axle of automobile generally is: blanking-base-blocking-finish-forging-side cut-shaping.Preforming is that initial blank is carried out hot forging forming, obtains comparatively reasonably prefabricated blank of metal volume distribution through 2～3 base work steps.Then prefabricated blank is carried out blocking, blocking is realized by forging mold and hotdie forging press.The blocking mould comprises upper die and lower die, counterdie adopts sealing overlap forging mold of the present utility model, its structure as shown in drawings, comprise die body 1, die cavity 2 and push rod 3, the internal upper part of die body 1 is provided with die cavity 2, push rod 3 is installed in the bottom jogger hole of die body 1, and jogger hole is communicated with die cavity 2, and the top of die cavity 2 is provided with the recipient 4 of peripheral integrally closed.Blocking is to be out of shape complicated step, and during blocking, pre-forging presses down with upper mould, produces overlap, and flows to outer rim, stops when the sidewall of the recipient 4 of running into counterdie die cavity 2 tops; When continuing to press down, the upper and lower mould of mould forms near closed hollow ring, and the overlap resistance of sealing is increasing, be full of fully until metal fill out, the die cavity between the counterdie.Push rod 3 ejected die body 1 with forging when blocking finished.It is crucial as follows that sealing overlap forging mold of the present utility model designs: the principle of cavity design is the position that emphasis considers to influence in the die cavity metal flow, makes some shapes and simplifies, and to reduce the metal flow resistance, is beneficial to the die cavity filling.The gradient of upper and lower mould sideshake of mould and recipient sidewall and container wall will be considered according to factors such as forging equipment, mould and die accuracy and forming process metal flow situations to the parameters such as distance of forging profile.As major parameter be for the blocking mould of the bracket of back axle of automobile of certain model: upper and lower mould sideshake value 1mm, the gradient of recipient sidewall is 1.5 °; The sidewall of recipient 4 is 30mm to the average distance of forging profile.

Claims

1. integrally closed overlap forge mould counterdie, comprise die body, die cavity and push rod, the internal upper part of die body is provided with die cavity, and push rod is installed in the bottom jogger hole of die body, jogger hole is communicated with die cavity, it is characterized in that: die cavity top is provided with the recipient of peripheral integrally closed.