Thermal creep plastic forming method for special-shaped aluminum alloy wall plate with variable thicknesses

Abstract

A thermal creep plastic forming method for special-shaped aluminum alloy wall plate with variable thicknesses and is suitable for the special-shaped aluminum alloy wall plate, high in size and moldedsurface precision requirement and good in surface quality, with the variable thicknesses. The method includes the following steps that firstly, a thermal creep plastic forming mold of the special-shaped aluminum alloy wall plate with the variable thicknesses is designed and machined; secondly, the special-shaped aluminum alloy wall plate with the variable thicknesses is subjected to plane unfolding; thirdly, according to the positions of reinforcing ribs in the plane unfolded drawing, corresponding reinforcing ribs are prepared on the plate, and positioning convex lugs are machined; fourthly,the special-shaped aluminum alloy wall plate with the variable thicknesses is bent in advance; fifthly, thermal creep plastic deforming is performed on the special-shaped aluminum alloy wall plate with the variable thicknesses; and sixthly, lineation is performed to cut off the positioning convex lugs. The wall plate formed through the method is short in machining period and low in cost, a formedpart is high in size and molded surface precision, and the surface quality is also remarkably improved.

Description

technical field [0001] The invention relates to a precision plastic forming method, in particular to a thermal creep plastic forming method of an aluminum alloy variable-thickness special-shaped wall plate. Background technique [0002] With the rapid development of high-tech fields such as aerospace, transportation, and weaponry, the demand for high-performance aluminum alloy products continues to grow, and the requirements for forming precision of products are getting higher and higher. In the field of aerospace, the forming accuracy of aluminum alloy variable-thickness special-shaped panels is directly related to the overall service performance of aerospace equipment. [0003] At present, the main manufacturing method of aluminum alloy variable-thickness special-shaped wall panels in the field of aerospace is cold forming. In cold forming, the part of the weight-reducing groove needs to be pasted with a backing plate in advance. This process is cumbersome and the size an...

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Problems solved by technology

[0004] The technical problem solved by the present invention is: to overcome the deficiencies of the prior art, and to provide a thermal creep plastic forming method of aluminum alloy variable-thickness special-shaped wall panels, which can overcome the long forming cycle of parts processed in the prior art, the difficulty in controlling the shape accuracy, Poor surface quality and other shortcomings can effectively ensure the precision forming of aluminum alloy variable thickness special-shaped wall panels

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