Hot-spinning cogging method based on nonuniform heating of aluminum alloy

A uniform heating, aluminum alloy technology, used in metal processing equipment, forming tools, manufacturing tools, etc., can solve the problems of excessive busbar dimensional accuracy, high temperature in the deformation zone, metal accumulation, etc., and achieve high surface hardness and good surface quality. , the effect of good metal fluidity

Inactive Publication Date: 2016-07-06
GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the actual spinning process, due to the deformation process of the aluminum alloy, the friction between the blank and the mandrel, and between the blank and the rotary wheel will generate a lot of heat, which will easily lead to excessive temperature in the deformation zone, resulting in metal deformation during the spinning process. Stacking, billet cracking, bus bar dimensional accuracy out-of-tolerance and other problems

Method used

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  • Hot-spinning cogging method based on nonuniform heating of aluminum alloy
  • Hot-spinning cogging method based on nonuniform heating of aluminum alloy

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Embodiment Construction

[0021] The present invention provides a method for hot-spinning blanking of an aluminum alloy by uneven heating. The present invention will be further described below in conjunction with the accompanying drawings and specific implementation methods.

[0022] Specific steps are as follows:

[0023] (1) The size of core mold 2 is: The length is 2500mm, and the material is die steel; the size of the aluminum alloy billet 4 is

[0024] (2) if figure 1 As shown, the mandrel 2 and the unloading ring 3 are heated to 380°C to 450°C by the heating device 1;

[0025] (3) if figure 2 As shown, the aluminum alloy blank 4 is placed on the mandrel 1;

[0026] (4) heating the upper end of the aluminum alloy billet 4 to 300°C-340°C and the lower end to 230°C-270°C through the heating device 1, and the intermediate temperature transitions naturally;

[0027] (Explanation: The temperature described in this method is the temperature of the core mold and the blank surface actually measur...

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Abstract

The invention belongs to the field of metal material processing, and in particular relates to a hot spinning blanking method of unevenly heated aluminum alloy. The method adopts a non-uniform heating method, so that the temperature of the mandrel and the unloading ring is higher than that of the aluminum alloy billet, and the temperature of the upper end of the aluminum alloy billet is higher than that of the lower end of the aluminum alloy billet. The internal metal fluidity of the aluminum alloy billet is good, which avoids cracks caused by spinning tensile stress; the outer surface of the aluminum alloy billet has relatively high hardness and strength, and is not easy to stick to the spinning wheel. The surface quality of the spinning billet is good and the busbar is straight; this method can be compared It is better to control the temperature of the deformation zone of spinning, and the billet hot spinning by this heating method has good surface quality, high yield and high dimensional accuracy.

Description

technical field [0001] The invention belongs to the field of metal material processing, and in particular relates to a hot spinning blanking method of unevenly heated aluminum alloy. Background technique [0002] Spinning is developed in modern times. It is an advanced metal plastic forming process without cutting processing that combines casting, extrusion, stretching, bending, ring rolling, cross rolling and rolling extrusion. Under the high pressure, the metal is processed into the required hollow rotating body point by point. In actual production, often due to the limited power of spinning equipment, when spinning large and thick blanks, the use of hot spinning method can reduce material deformation resistance, reduce spinning pressure, and use existing equipment more effectively. [0003] Precise control of the actual temperature in the deformation zone of the aluminum alloy billet is one of the key technologies for aluminum alloy hot spinning billet opening. In the a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D22/16B21D37/16
Inventor 柴国强李德富
Owner GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG
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