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Cold and hot extrusion molding method of rotary thick-walled shell part for vehicle

A composite extrusion and parts technology, which is applied in the field of cold and warm composite extrusion forming of rotating thick-walled shell parts for vehicles, can solve problems such as difficult to form high-strength parts, and achieve low deformation resistance, good surface quality and high material utilization. Effect

Active Publication Date: 2013-05-01
SHANGHAI UNIV OF ENG SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The material utilization rate of the cold extrusion process is high, and the surface quality, dimensional accuracy, and mechanical properties of the product are all good, but it is difficult to form high-strength parts with complex shapes

Method used

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  • Cold and hot extrusion molding method of rotary thick-walled shell part for vehicle

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Experimental program
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Effect test

Embodiment 1

[0031] A cold-temperature compound extrusion forming method for a rotary thick-walled shell part for a vehicle, the process flow of which is as follows figure 1 As shown, the method comprises the following steps: (1) sawing round steel for blanking to obtain a billet; (2) cleaning the surface of the billet to remove impurities and lubricating the billet; (3) heating the billet; (4) ) Warm extrusion of the heated billet, so that the whole billet reaches the basic size of the part to form a large-diameter cup part; (5) cooling the large-diameter cup part; (6) shot blasting the large-diameter cup part (7) Carry out phosphating and saponification treatment to large-diameter cup parts; (8) Carry out cold extrusion to large-diameter cup parts, form small-diameter cup parts and shape them; (9) small-diameter cup parts after extrusion Machining is carried out to obtain rotary thick-walled shell parts for vehicles.

[0032] The method for heating the billet in step (3) is: heating the...

Embodiment 2

[0034] A cold-temperature compound extrusion forming method for a rotary thick-walled shell part for a vehicle, the process flow of which is as follows figure 1 As shown, the method comprises the following steps: (1) sawing round steel for blanking to obtain a billet; (2) cleaning the surface of the billet to remove impurities and lubricating the billet; (3) heating the billet; (4) ) Warm extrusion of the heated billet, so that the whole billet reaches the basic size of the part to form a large-diameter cup part; (5) cooling the large-diameter cup part; (6) shot blasting the large-diameter cup part (7) Carry out phosphating and saponification treatment to large-diameter cup parts; (8) Carry out cold extrusion to large-diameter cup parts, form small-diameter cup parts and shape them; (9) small-diameter cup parts after extrusion Machining is carried out to obtain rotary thick-walled shell parts for vehicles.

[0035] Wherein, the specific method of lubricating the billet in ste...

Embodiment 3

[0037] A cold-temperature compound extrusion forming method for a rotary thick-walled shell part for a vehicle, the process flow of which is as follows figure 1 As shown, the method comprises the following steps: (1) sawing round steel for blanking to obtain a billet; (2) cleaning the surface of the billet to remove impurities and lubricating the billet; (3) heating the billet; (4) ) Warm extrusion of the heated billet, so that the whole billet reaches the basic size of the part to form a large-diameter cup part; (5) cooling the large-diameter cup part; (6) shot blasting the large-diameter cup part (7) Carry out phosphating and saponification treatment to large-diameter cup parts; (8) Carry out cold extrusion to large-diameter cup parts, form small-diameter cup parts and shape them; (9) small-diameter cup parts after extrusion Machining is carried out to obtain rotary thick-walled shell parts for vehicles.

[0038] Wherein, the specific method of lubricating the billet in ste...

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Abstract

The invention relates to a cold and hot extrusion molding method of a rotary thick-walled shell part for a vehicle. The method comprises the following steps of (1) blanking a round steel by sawing the round steel to obtain a blank material; (2) cleaning the surface of the blank material, removing impurities from the surface of the blank material, and lubricating the blank material; (3) heating the blank material; (4) performing hot extrusion on the heated blank material to form a cup-shaped part with large diameter; (5) cooling the cup-shaped part with large diameter; (6) performing shot blasting on the cup-shaped part with large diameter; (7) performing phosphorization and saponification on the cup-shaped part with large diameter; (8) performing cold extrusion on the cup-shaped part with large diameter, and molding and shaping the cup-shaped part with small diameter; and (9) machining the extruded cup-shaped part with small diameter to obtain the rotary thick-walled shell part for the vehicle. Compared with the prior art, the method has the advantages of compact production process, high material utilization rate, good part mechanical property, low production cost and the like.

Description

technical field [0001] The invention relates to plastic processing technology of metal materials, in particular to a cold-temperature compound extrusion forming method for a rotary thick-walled shell part used in a vehicle. Background technique [0002] In the manufacturing industry, there are often special-shaped parts with high material strength and complex shapes. They need to bear high loads during work and play an important role in the system. These parts have high requirements for dimensional accuracy and mechanical properties. However, the high strength of the part material and the complexity of the shape determine the difficulty of its manufacture. There are generally two traditional forming processes for such parts: direct cutting of raw materials; cutting after hot forging. [0003] For the first method, the mechanical properties of parts are difficult to meet the requirements, and the utilization rate of materials is very low. Considering the high price of high-s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C23/02B21C23/32B21C29/00
Inventor 龚红英付云龙张鹏张浩李会肖李国庆
Owner SHANGHAI UNIV OF ENG SCI
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