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Part punching method for aluminum alloy plate subjected to local copious cooling

A technology of aluminum alloy strips and strips, which is applied in the stamping field of partially cryogenic parts of aluminum alloy strips, can solve problems such as the reduction of mechanical properties, and achieve the effects of improving mechanical properties, prolonging service life, and reducing product weight

Inactive Publication Date: 2019-01-18
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, one disadvantage of this method is that its mechanical properties are still greatly reduced compared to stamping parts prepared by cold working.

Method used

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  • Part punching method for aluminum alloy plate subjected to local copious cooling
  • Part punching method for aluminum alloy plate subjected to local copious cooling

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Embodiment Construction

[0017] The implementation of the present invention will be described in detail below in conjunction with the drawings and examples.

[0018] The present invention a kind of parts stamping method of local cryogenic cooling of aluminum alloy strip, its main principle is:

[0019] Aluminum alloy materials have good toughness at high temperature and poor toughness at room temperature, but the toughness becomes very good at ultra-low temperature. That is, the aluminum alloy strip has excellent plastic deformation ability at ultra-low temperature, and at the same time, the strength and toughness of the aluminum alloy increase simultaneously after ultra-low temperature plastic deformation.

[0020] In the stamping preparation process of aluminum alloy parts, cryogenic treatment is performed on local areas that need to increase strength and require high plasticity, and then perform rapid part stamping forming processing to obtain products with excellent quality.

[0021] The specific...

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Abstract

The invention provides a part punching method for an aluminum alloy plate subjected to local copious cooling. The method comprises the steps that 1, an aluminum alloy strip is processed in a sheet shape; 2, the processed material is subjected to local copious cooling by using cooling nitrogen gas, and the temperature is lowered to be -150 DEG C--100 DEG C; 3, the material obtained after local copious cooling is subjected to part punching, and a high-performance aluminum alloy punching part is obtained. By means of the method, the mechanical property of an existing aluminum alloy part punchingpiece can be improved, the product weight is reduced, the service life of a workpiece is prolonged, and the high-performance aluminum alloy punching part is obtained.

Description

technical field [0001] The invention belongs to the technical field of plastic forming of metal materials, and in particular relates to a part stamping method of aluminum alloy plates and strips with local cryogenic cooling. Background technique [0002] Due to its low density, aluminum alloy has been rapidly developed in the field of automobile lightweight. However, compared with steel materials, the plastic deformation ability of aluminum alloys is relatively poor, and at the same time, the strength of aluminum alloys needs to be further improved compared with steel materials. [0003] At present, in the stamping preparation of aluminum alloy parts, there is a problem of insufficient strength in some local areas, and at the same time, crack defects are prone to appear in these areas. In order to solve this problem, people often use local heating technology for processing. On the one hand, there is no need to heat the entire structural part, which saves energy. On the othe...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D22/02B21D37/16B21D37/18
Inventor 喻海良巴泰杜青林
Owner CENT SOUTH UNIV