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A cold heading extrusion composite forming method for non-ferrous metal shell parts for vehicles

A non-ferrous metal and composite forming technology, which is used in the field of cold heading extrusion composite forming of non-ferrous metal shell parts for vehicles, can solve the problems of easy cracking of the lubricating film, improve the surface adhesion, reduce the number of processing steps, and simplify the processing process. Effect

Active Publication Date: 2020-12-22
SHANGHAI UNIV OF ENG SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the problem of pollution treatment in the prior art and the defect that the lubricating film is easily broken during the extrusion process of the conventional water-based polymer lubricant, and to provide a method that can solve the problem of the adhesion of the lubricant on the surface of the part and improve the lubrication performance. Forming method of non-ferrous metal shell parts for vehicles by improving the adsorption force of solvent and reducing the friction force in the cold extrusion process
The surface quality, dimensional accuracy and mechanical properties of the extruded product parts under the process of the present invention are all good, which effectively avoids the need for large loads, large energy consumption, numerous lubrication treatment procedures, and lubrication waste liquid in the traditional manufacturing industry. It also provides a reference processing method for the precision forming and green lubrication production of non-ferrous metals in small and medium-sized forgings.

Method used

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  • A cold heading extrusion composite forming method for non-ferrous metal shell parts for vehicles
  • A cold heading extrusion composite forming method for non-ferrous metal shell parts for vehicles
  • A cold heading extrusion composite forming method for non-ferrous metal shell parts for vehicles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] A cold heading and extrusion composite forming method for non-ferrous metal shell parts for vehicles, the specific steps are as follows figure 2 Shown:

[0055] (1) Using a circular saw machine to cut the non-ferrous metal AA6061 (series 6 aluminum alloy) to produce a non-ferrous metal shell part blank for vehicles with a burr of less than 0.5 mm;

[0056] (2) Carry out annealing treatment to the billet, the annealing temperature is controlled at 500 ° C for 4 hours, and it is directly out of the furnace;

[0057] (3) Use a pellet with a diameter of 0.35 mm to blast the annealed billet for 15 minutes;

[0058] (4) Adopt water-based polymer lubricant III to carry out thermal coating treatment on the surface of the billet after shot blasting treatment, such as figure 1 Shown: After heating the billet to 180°C, soak it with water-based polymer lubricant I for 4 seconds. After treatment, the thickness of water-based polymer lubricant I on the surface of the billet is 4 μ...

Embodiment 2

[0076] A cold heading extrusion composite forming method for non-ferrous metal shell parts for vehicles, the specific steps are as follows:

[0077] (1) AA6082 (series 6 aluminum alloy) is blanked with a circular saw machine to produce a non-ferrous metal shell part blank for vehicles with a burr of less than 0.5 mm;

[0078] (2) Carry out annealing treatment to the billet, the annealing temperature is controlled at 520 ℃ for 4.5 hours, and it is directly out of the furnace;

[0079] (3) Use a pellet with a diameter of 0.35 mm to blast the annealed billet for 15 minutes;

[0080] (4) Use water-based polymer lubricant I to thermally coat the surface of the billet after shot blasting treatment, that is, heat the billet to 220 ° C and use water-based polymer lubricant I to infiltrate for 4 seconds. The thickness of Molecular Lubricant I is 5 μm, and then the blank is dried naturally;

[0081](5) Put the blank processed in step (4) into the filling die, and the filling punch mov...

Embodiment 3

[0088] A cold heading extrusion composite forming method for non-ferrous metal shell parts for vehicles, the specific steps are as follows:

[0089] (1) H62 brass is blanked by a circular saw machine to produce a non-ferrous metal shell part blank for vehicles with a burr of less than 0.5 mm;

[0090] (2) Carry out annealing treatment on the blank, the annealing temperature is controlled at 260-300°C for 2-4 hours, and it is directly out of the furnace;

[0091] (3) Use a pellet with a diameter of 0.35 mm to blast the annealed billet for 15 minutes;

[0092] (4) Use water-based polymer lubricant I to thermally coat the surface of the billet after shot blasting treatment, that is, heat the billet to 180°C and use water-based polymer lubricant I to infiltrate for 4s. The thickness of Molecular Lubricant I is 3 μm, and then the blank is dehydrated and dried for 8 minutes;

[0093] (5) Put the blank processed in step (4) into the filling die, and the filling punch moves down. Th...

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Abstract

The invention discloses a cold upsetting extrusion composite forming method of an automotive non-ferrous metal shell part. According to the method, the surface of a blank is subjected to hot coating treatment by adopting a water-based high-molecular lubricant before the blank is subjected to cold upsetting extrusion composite forming, and the hot coating treatment is characterized by infiltratingfor 3-6 s by using the water-based high-molecular lubricant after the blank is heated to 180-220 DEG c. According to the cold upsetting extrusion composite forming method of the automotive non-ferrousmetal shell part, the surface of the blank is subjected to hot coating treatment by adopting the water-based high-molecular lubricant, so that green lubrication is realized, and the non-environment-friendly phosphating treatment is replaced; the mold filling process provides a guarantee for reverse-extrusion finishing of the blank, the mold can be positioned in reverse-extrusion at the same time,so that the precision of the part is improved; after mold filling, the mold is reversely extruded at one time, so that the production period is greatly shortened, the mold opening cost is greatly reduced, and the production cost is low; and the material utilization rate is high, the mechanical property of parts is good, the required equipment tonnage is low, the requirements of modern green manufacturing are met, and the method is wide in application prospect.

Description

technical field [0001] The invention belongs to the technical field of precision plastic forming of non-ferrous metal materials, and relates to a cold heading extrusion compound forming method of non-ferrous metal shell parts for vehicles. Background technique [0002] Among the various types of building materials currently available, non-ferrous metals such as aluminum alloys and copper alloys show unique advantages. They not only can resist corrosion, present a beautiful appearance and excellent thermal conductivity, but also have high mechanical properties. Smaller size has higher strength. Due to the extremely strong plasticity of non-ferrous metals such as aluminum alloys and copper alloys, their precision plastic forming is a research hotspot at home and abroad, but the lubrication of materials in extrusion forming is always a difficult problem in the precision plastic forming of non-ferrous metals, so lubrication treatment The research is one of the important links i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/00B21C23/32B21C23/20
CPCB21C23/20B21C23/32B23P15/00
Inventor 龚红英姜天亮钱勇施为钟赵小云廖泽寰
Owner SHANGHAI UNIV OF ENG SCI
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