CN104972042A

CN104972042A - Hammer die forging die for half shaft die forgings and hammer die forging process of hammer die forging die

Info

Publication number: CN104972042A
Application number: CN201510348090.8A
Authority: CN
Inventors: 潘现芬; 于宜洛; 白孝俊; 李继红; 陆长青; 王阔军; 阮艳静; 张娜娜; 张国宏; 刘亚丽; 田兴平; 孙海霞; 吴傲宗; 刘洋洋; 刘金蕾; 宋国品
Original assignee: First Tractor Co Ltd
Current assignee: First Tractor Co Ltd
Priority date: 2015-06-23
Filing date: 2015-06-23
Publication date: 2015-10-14

Abstract

Provided are a hammer die forging die for half shaft die forgings and a hammer die forging process of the hammer die forging die. The die comprises an upper die body, a lower die body, an ejector rod and a hitting rod. The upper die body is fixed to a die forging hammer head. The lower die body is fixed to a die forging hammer holder. The ejector rod and the hitting rod are arranged in the lower die body. The upper die body and the lower die body are guided through buckles. The process comprises the following steps that 1, after a bar is heated to 1,100 DEG C to 1,150 DEG C, the bar is manufactured into a middle die forging blank through free forging or horizontal forging machine die forging; 2, after the middle die forging blank is heated to 1,150 DEG C to 1,200 DEG C, the middle die forging blank is placed in the lower die body of the die; 3, the upper die body is driven by the die forging hammer head and guided by the buckles to hit the middle die forging blank placed in the lower die body, finally forming is achieved through repeated forging, and final forging temperature is not lower than 950 DEG C; 4, a hammer is used for pushing the hitting rod, and a half shaft in the lower die body is ejected out through the acting force of the ejector rod; and 5 after the half shaft is taken away, the hitting rod is pulled out, the ejector rod falls back, and a work stroke is completed.

Description

A kind of semiaxis class forging part hammer die forging mould and hammer die forging technique thereof

Technical field

The invention belongs to Forging Technology field, relate to a kind of semiaxis class forging part hammer die forging mould and hammer die forging technique thereof.

Background technology

Semiaxis, is live axle again, sees Fig. 1, is the key components and parts on engineering goods, for transmitting power to tire, thus drives car load to advance.Due to the critical component that it is power transmission, therefore higher to the various performance requirements of product.Should meet it to use under high strength load, meeting it again has enough service life.Semiaxis is generally made up of deep bid A and longer bar portion B, and changes of section is large, and forging manufacturability is poor.

The production technology of current state inner shaft is mainly: behind open die forging pulling bar portion, adopt loose tooling forging formed by forging, this process limitation is larger, residual overlap and burr are comparatively large, and surface quality is poor, and die life is shorter, production efficiency is lower, and deep bid A gauge is also unstable; After carrying out gathering stock on a hydraulic press, rotary forging press is shaped, this production efficiency is low, and production cost is high.

Summary of the invention

The object of the present invention is to provide a kind of semiaxis class forging part hammer die forging mould and hammer die forging technique thereof: adopt semiaxis class forging part hammer die forging mould hammer die forging to be shaped this technology mode, technique versatility is good, deep bid A gauge is stablized, and noresidue overlap and burr, surface quality is good.

In order to realize foregoing invention object, the present invention by the following technical solutions: a kind of semiaxis class forging part hammer die forging mould, comprising: upper die and lower die, push rod, make bar; Patrix is fixed on die hammer tup by chock and key, and counterdie is fixed on die hammer clamper by chock and key, push rod and make bar and be all placed in counterdie, and upper die and lower die are led by snap close.

The present invention also provides a kind of semiaxis class forging part hammer die forging technique, comprises the following steps:

[1], after bar being heated to 1100 DEG C ~ 1150 DEG C, use open die forging or horizontal forging and upsetting machine die forging that bar is made intermediate die forge piece blank reheating;

[2], after intermediate die forge piece blank reheating being heated to 1150 DEG C ~ 1200 DEG C, be placed in semiaxis class forging part hammer die forging lower mould;

[3], under the drive of die hammer tup C, patrix impacts being placed in the intermediate die forge piece blank reheating in counterdie under the guiding of snap close, forces intermediate blank to be full of die cavity, and repeatedly forge rear final shaping, final forging temperature is not less than 950 DEG C;

[4], use hammer or other external force to promote to make bar, horizontal applied force is converted into active force upwards by push rod, ejects the semiaxis in counterdie;

[5], after taking semiaxis away, extract out and make bar, push rod 3 falls after rise, completes an impulse stroke.

Owing to adopting the above technical scheme, the present invention can reach following beneficial effect:

1) finally excise the technique of overlap because hammer die forging after employing base is shaped, forging surface quality is good, dimensionally stable, noresidue overlap and burr;

2) owing to devising liftout attachment in a mold, the problem that long component of rod category cannot use hammer die forging to produce is efficiently solved;

3) mould structure novelty is compact, long service life, and Technological adaptability is strong, and easy to operate, production efficiency is high, is convenient to mechanical automation and produces, greatly reduce production cost.

Accompanying drawing explanation

Fig. 1 is the structural representation of semiaxis class forging part;

Fig. 2 is the structural representation of a kind of semiaxis class of the present invention forging part hammer die forging mould;

Fig. 3 is the left TV structure schematic diagram of a kind of semiaxis of the present invention class forging part hammer die forging mould;

Fig. 4 is the schematic block diagram of hammer die forging technique of the present invention;

The intermediate die forge piece blank reheating structural representation that Fig. 5 uses for hammer die forging technique of the present invention.

Detailed description of the invention

Below in conjunction with accompanying drawing, the present invention will be further described, as shown in Fig. 2 ~ 3: a kind of semiaxis class forging part hammer die forging mould, comprising: patrix 2, counterdie 1, push rod 3 and make bar 4.Wherein, patrix 2 is fastened on die hammer tup C by chock and key, and counterdie 1 is fastened on die hammer clamper D by chock and key, push rod 3 and make bar 4 and be all placed in counterdie 1.During work, patrix 2 rises under tup C drives, intermediate die forge piece blank reheating is put into after in counterdie 1, patrix 2 declines rapidly under the drive of tup, on leading repeatedly impact in counterdie 1 intermediate die forge piece blank reheating by snap close, intermediate die forge piece blank reheating is forged shaping, simultaneously, beat inclined-plane, driven forward push rod 3 lower end under the effect of extraneous strength, inclined-plane, bar 4 front end, semiaxis forging part is upwards ejected.

As shown in Figure 4, the invention also discloses a kind of semiaxis class forging part hammer die forging technique, comprise five steps, particular content is as follows:

Step I, after bar being heated to 1100 DEG C ~ 1150 DEG C, use open die forging or horizontal forging and upsetting machine die forging that bar is made intermediate die forge piece blank reheating, its shape is as shown in Figure 5;

Step II, after intermediate die forge piece blank reheating being heated to 1150 DEG C ~ 1200 DEG C, is placed in semiaxis class forging part hammer die forging lower mould 1;

Step III, under the drive of die hammer tup C, patrix 2 impacts being placed in the intermediate die forge piece blank reheating in counterdie 1 under the guiding of snap close, forces intermediate blank to be full of die cavity, and repeatedly forge rear final shaping, final forging temperature is not less than 950 DEG C;

Step IV, uses hammer or other external force to promote to make bar 4, horizontal applied force is converted into active force upwards, ejects the semiaxis in counterdie 1 by push rod 3;

Step V, after taking semiaxis away, extract out and make bar 4, push rod 3 falls after rise, completes an impulse stroke.

Semiaxis class forging part hammer die forging mould provided by the invention and hammer die forging technique, mould structure novelty is compact, long service life, and Technological adaptability is strong, and easy to operate, production efficiency is high, is convenient to mechanical automation and produces, greatly reduce production cost.

Claims

1. a semiaxis class forging part hammer die forging mould, comprising: patrix (2), counterdie (1), push rod (3), make bar (4); It is characterized in that: patrix (2) is fixed on die hammer tup (C) by chock and key, counterdie (1) is fixed on die hammer clamper (D) by chock and key, push rod (3) and make bar (4) and be all placed in counterdie (1), patrix (2) and counterdie (1) are led by snap close.

2. a kind of semiaxis class forging part hammer die forging mould according to claim 1, is characterized in that: semiaxis class forging part hammer die forging technique comprises the following steps:

[2], after intermediate die forge piece blank reheating being heated to 1150 DEG C ~ 1200 DEG C, be placed in semiaxis class forging part hammer die forging lower mould (1);

[3] under the drive of die hammer tup (C), patrix (2) impacts being placed in the intermediate die forge piece blank reheating in counterdie (1) under the guiding of snap close, forces intermediate blank to be full of die cavity, and repeatedly forge rear final shaping, final forging temperature is not less than 950 DEG C;

[4] use hammer or other external force to promote to make bar (4), horizontal applied force is converted into active force upwards by push rod (3), ejects the semiaxis in counterdie (1);

[5] after taking semiaxis away, extract out and make bar (4), push rod (3) falls after rise, completes an impulse stroke.