CN102825240A

CN102825240A - Aluminum alloy liquid die forging manufacturing process

Info

Publication number: CN102825240A
Application number: CN2012103624120A
Authority: CN
Inventors: 谢桂娣
Original assignee: ZHENJIANG FORGING MACHINE TOOL PLANT
Current assignee: ZHENJIANG FORGING MACHINE TOOL PLANT
Priority date: 2012-09-26
Filing date: 2012-09-26
Publication date: 2012-12-19

Abstract

An aluminum alloy liquid die forging manufacturing process comprises the following steps of: smelting an aluminum alloy material; preparing and assembling a die in a preheating manner; pouring the die in aluminum water; pressing; opening the die to take a forging, and the like. According to the invention, the characteristic that metal liquid is easily shaped because the metal liquid flows easily during casting is utilized, and the hot die forging technology is combined, so that the metal liquid flowing in a die cavity is shaped, and is crystallized and solidified under the action of high static pressure, so as to generate a plastic deformation. Therefore, the defects of hole shrinkage and porosity caused by shrinkage and solidification shrinkage of the metal liquid are overcome forcedly, thereby obtaining various liquid die forgings without casting defects. The die forging manufacturing process provided by the invention has the benefits that the defects in the casting process are overcome; the mechanical strength of a product is improved; and the product having a complex geometrical shape which can not be processed by the die forging technology can be produced by the forging manufacturing process provided by the invention, so that usability of the product is improved, the energy consumption is lowered greatly, and the energy source is saved.

Description

Aluminum alloy melt morphotype forging fabrication technique

Technical field

What the present invention relates to is a kind of aluminum alloy melt morphotype forging fabrication technique, and particularly a kind of aluminum alloy melt morphotype forging fabrication technique that is used for the electrified high-speed railway elements of contacting net belongs to technical field of machining.

Background technology

At present; Electrified high-speed railway elements of contacting net product adopts casting technique or the manufacturing of metal pattern forging process usually; The product that adopts casting technique to produce is easy to generate shrinkage cavity, shrinkage porosite, microstructure coarsening; Defective is many, is unfavorable for the raising of mechanical strength, can not guarantee the traffic safety requirement of bullet train; And adopt contour forging technique production can't accomplish than the product of complicated geometry some, and energy resource consumption is bigger.

Summary of the invention

The technical problem that the present invention will solve is: in order to overcome above-mentioned technical problem; A kind of aluminum alloy melt morphotype forging fabrication technique that is used for the electrified high-speed railway elements of contacting net is provided; The defective raising product mechanical strength that casting technique produces can be eliminated, and the product of complex geometric shapes can be produced.

Technical scheme: a kind of aluminum alloy melt morphotype forging fabrication technique, concrete contour forging technique step is following:

A) melting of aluminium alloy stock is prepared and preheating mould simultaneously;

B) matched moulds;

C) aluminium water cast;

D) exert pressure;

E) die sinking pickup.

Described melting may further comprise the steps:

A) preparation before the fusing;

B) charging;

C) heat fused;

D) aluminium crystal refining;

E) detect, adjust composition;

F) adjustment furnace temperature;

G) heat preservation for standby use.

Said cast comprises slow shot and fast shot, and slow shot pressure is 12 MPas, and slow shot speed is the 0.2-0.4 metre per second (m/s); Fast shot speed is the 0.8-1 metre per second (m/s); The whole injection time is 6-8 second; The time that keep-ups pressure is 12-14 second.

Aluminium water pouring temperature: 660 ℃; Mold preheating temperature: 180 ℃; Mould continuous operation temperature: 200-220 ℃.

It is 750 ℃ that said aluminium crystal refines temperature, and the aluminium crystal refines the time: 15 minutes.

Beneficial effect: can eliminate the defective raising product mechanical strength that casting technique produces; And can produce the product of the complex geometric shapes that contour forging technique can't process; Therefore not only improved the serviceability of product, and bigger reduction energy consumption, practiced thrift the energy.

Description of drawings

Fig. 1 is the liquid forging process flow chart;

Fig. 2 is the fusion process sketch map.

The specific embodiment

In order to make the object of the invention, technical scheme and advantage clearer, carry out detailed description in the face of the preferred embodiments of the present invention down.

A kind of aluminum alloy melt morphotype forging fabrication technique, concrete contour forging technique step is following:

B) matched moulds;

C) aluminium water cast, said cast comprises slow shot and fast shot, slow shot pressure is 12 MPas, slow shot speed

Degree is the 0.2-0.4 metre per second (m/s); Fast shot speed is the 0.8-1 metre per second (m/s); The whole injection time is 6-8 second; Aluminium water waters

Annotate temperature: 660 ℃; Mold preheating temperature: 180 ℃; Mould continuous operation temperature: 200-220 ℃;

D) exert pressure, the time that keep-ups pressure is 12-14 second;

E) die sinking pickup.

Described melting may further comprise the steps:

A) preparation before the fusing;

B) charging;

C) heat fused;

D) aluminium crystal refining, it is 750 ℃ that said aluminium crystal refines temperature, the aluminium crystal refines the time: 15 minutes;

E) detect, adjust composition;

F) adjustment furnace temperature;

G) heat preservation for standby use.

Aluminum alloy melt morphotype forging fabrication technique is the compound of foundry engieering and hot forging technology.The liquid flow forming that is prone to was easy to characteristics when the present invention utilized metal casting; In conjunction with the hot forging technology; Make molten metal flowing forming in mold cavity, and under bigger static pressure effect crystallization and freezing, and produce plastic deformation; Forcibly eliminate because of metal liquid contraction, the formed shrinkage cavity of solidification shrinkage and shrinkage porosite, to obtain the various liquid forging parts of no any casting flaw.Therefore the liquid forging part is compared with foundry goods, is easy to eliminate casting flaw; Compare with the hot-die forging, be shaped easily, required plastic force is little, and promptly aluminum alloy melt morphotype forging fabrication technique has made full use of the strong point of casting technique and hot forging technology, has also remedied the deficiency of these two kinds of technologies simultaneously.Adopt the elements of contacting net product of aluminum alloy melt technology of Liquid Die Forging manufacturing that casing seat, sleeve ears, sleeve pipe monaural, rotation ears, positioning pipe ears, positioning support, Messenger Wire base etc. are arranged.

Liquid forging equipment has vertical and the horizontal type structure form.Adopting the material trademark of the elements of contacting net product of aluminum alloy melt technology of Liquid Die Forging manufacturing is AlSi7Mg0.3 and AlSi7Mg0.6; The aluminium crystal refines temperature: 750 ℃; The aluminium crystal refines the time: 15min; Aluminium water pouring temperature: 660 ℃; Mold preheating temperature: 180 ℃; Mould continuous operation temperature: 200～220 ℃; Slow shot pressure: 12Mpa; Slow shot speed: 0.2～0.4m/s; Fast shot speed: 0.8～1.0m/s; The injection time: 6～8s; Dwell time: 12～14s.

Claims

1. an aluminum alloy melt morphotype forging fabrication technique is characterized in that, concrete contour forging technique step is following:

B) matched moulds;

C) aluminium water cast;

D) exert pressure;

E) die sinking pickup.

2. aluminum alloy melt morphotype forging fabrication technique according to claim 1, it is characterized in that: described melting may further comprise the steps:

A) preparation before the fusing;

B) charging;

C) heat fused;

D) aluminium crystal refining;

E) detect, adjust composition;

F) adjustment furnace temperature;

G) heat preservation for standby use.

3. aluminum alloy melt morphotype forging fabrication technique according to claim 1, it is characterized in that: said cast comprises slow shot and fast shot, and slow shot pressure is 12 MPas, and slow shot speed is the 0.2-0.4 metre per second (m/s); Fast shot speed is the 0.8-1 metre per second (m/s); The whole injection time is 6-8 second; The time that keep-ups pressure is 12-14 second.

4. aluminum alloy melt morphotype forging fabrication technique according to claim 1 is characterized in that: aluminium water pouring temperature: 660 ℃; Mold preheating temperature: 180 ℃; Mould continuous operation temperature: 200-220 ℃.

5. aluminum alloy melt morphotype forging fabrication technique according to claim 2, it is characterized in that: it is 750 ℃ that said aluminium crystal refines temperature, and the aluminium crystal refines the time: 15 minutes.