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Automobile U-shaped part local copious cooling rolling preparing method

A part and U-shaped technology, which is applied in the field of local cryogenic rolling of automobile U-shaped parts, can solve problems such as cracks, poor material willfulness, and internal crack surfaces.

Active Publication Date: 2019-05-14
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the use of strips to manufacture U-shaped parts mainly has the following problems: First, some materials have internal cracks and surface crack defects due to poor willfulness during the bending process
Secondly, due to the elastic deformation of the strip during the bending process, elastic recovery is prone to occur

Method used

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  • Automobile U-shaped part local copious cooling rolling preparing method

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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 invention discloses a partial cryogenic rolling preparation method for U-shaped parts of automobiles, which is suitable for aluminum and aluminum alloys, copper and copper alloys. case has better toughness. Therefore, this mechanism can be used for plastic forming to reduce the possibility of fracture behavior during sheet corner bending. The residual stress inside the rolled piece can be eliminated by using high-frequency ultrasonic vibration. At the same time, high-frequency vibration can eliminate the springback behavior of the strip during the strip forming process. Therefore, according to this mechanism, the rebound behavior of the corner of the rolled piece during the rolling deformation of the U-shaped piece can be eliminated. At the same time, the local cryogenic treatment technology can effectively improve the mechanical p...

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Abstract

The invention relates to an automobile U-shaped part local copious cooling rolling preparing method suitable for aluminum, aluminum alloys, copper and copper alloys. A metal coiled material is machined to be at the length, width and thickness required by products, a metal plate strip is obtained, a corner bending deformation zone of the metal plate strip is marked, a marked part is subjected to local copious cooling treatment through cooling nitrogen, the cooling temperature is -190 DEG C to -50 DEG C, a continuous rolling mill with a hole type is started, high frequency ultrasonic wave vibration is adopted on a lower hole type roller, a workpiece obtained after local copious cooling treatment is machined with the continuous rolling mill with the hole type under ultrasonic wave assistance,and a U-shaped part without rebounding and corner crack defects is prepared.

Description

technical field [0001] The invention belongs to the technical field of metal material rolling, and in particular relates to a preparation method of local deep cold rolling of U-shaped parts of automobiles. Background technique [0002] U-shaped parts are used in many important automotive, aerospace and other manufacturing processes. At present, the use of strips to manufacture U-shaped parts mainly has the following problems: First, some materials have internal cracks and surface crack defects due to poor willfulness during the bending process. Secondly, due to the elastic deformation of the strip during the bending process, elastic recovery is prone to occur. Therefore, researchers and engineers have been thinking about how to effectively reduce the defects of U-shaped parts and improve the manufacturing efficiency of U-shaped parts. Contents of the invention [0003] In order to overcome the above-mentioned shortcomings of the prior art, the object of the present inven...

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Application Information

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IPC IPC(8): B21B1/095B21B11/00B21B3/00
Inventor 喻海良宋玲玲刘粤崔晓辉
Owner CENT SOUTH UNIV