Precise plastic formation method for aluminum alloy complicated special-shaped curved structure part

Abstract

The invention provides a precise plastic formation method for an aluminum alloy complicated special-shaped curved structure part and belongs to the field of precise sheet metal machining. The preciseplastic formation method is applicable to the aluminum alloy complicated special-shaped curved structure part which has relatively high requirements on dimensional precision, profile surface precisionand surface quality after formation. The method provided by the invention comprises the following steps of: (1) designing and manufacturing an aluminum alloy special-shaped curved thermo-forming mold, a flanging-hole flanging mold and a right side window thermal-flanging mold; (2) calculating the boundary dimension of a blank material and carrying out blanking; (3) carrying out top special-shapedcurved thermo-formation; (4) removing the process allowance and forming a flanging-hole flanging bottom hole and a flanging window flanging front window; (5) carrying out flanging formation of a flanging hole; (6) carrying bending formation of a bent edge; and (7) carrying thermo-flanging formation of the window. The method provided by the invention can overcome the shortcomings that a part machined by the prior art is poor in integrity, difficult in boundary dimension control or the cost is relatively high, and can effectively guarantee precise formation of the aluminum alloy complicated special-shaped curved structure part.

Description

technical field [0001] The invention relates to a special-shaped curved forming method, in particular to a precision plastic forming method of an aluminum alloy complex special-shaped curved surface structural part, belonging to the field of precision sheet metal processing. Background technique [0002] Due to its excellent performance, aluminum alloys are widely used in aerospace, rail transit, weaponry and other fields. In the field of aerospace, the integration and lightweight of aluminum alloy complex special-shaped curved surface structural parts are getting higher and higher, and the requirements for manufacturing precision are getting higher and higher. In the field of sheet metal forming, the commonly used manufacturing methods of aluminum alloy complex special-shaped curved surface structural parts mainly include cold pressing forming and superplastic forming. Cold forming is not only difficult to meet the requirements of dimensional accuracy, but also difficult t...

AI Technical Summary

Problems solved by technology

[0003] The technical problem solved by the present invention is: to overcome the deficiencies of the prior art, and provide a precision plastic forming method for complex and special-shaped curved surface structural parts of aluminum alloy, which can overcome the poor integrity of the parts processed by the prior art, difficulty in controlling the shape accuracy or relatively high cost. High defects can effectively ensure the precision forming of aluminum alloy complex special-shaped curved surface structural parts

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