Manufacturing method for superplastic forming of lightweight missile wing

Abstract

The invention provides a manufacturing method for superplastic forming of a lightweight missile wing, and belongs to the field of superplastic forming. In order to solve the problems of core plate tearing, excessive thinning, low flatness of an outer skin, easy generation of order difference and grooves and the like, the invention provides a light-weight missile wing superplastic forming manufacturing method, which comprises the following steps of two-layer core plate forming process steps: blanking, acid pickling, protective glue coating, solder resist coating, seal welding, diffusion bonding, superplastic forming and appearance machining; the missile wing outer skin forming process comprises the steps of blanking, hot forming and appearance machining. The missile wing core plate and outer skin forming process comprises the steps of acid pickling, seal welding, diffusion bonding and appearance machining. The method is suitable for superplastic forming / diffusion bonding of the titanium alloy four-layer structure, the obtained outer skin is high in surface flatness and free of step difference and grooves, the R corner of the core plate is free of thin necks and tearing, and the problem that the core plate is excessively thinned is solved.

Description

technical field [0001] The invention belongs to the technical field of superplastic forming, and in particular relates to a manufacturing method of superplastic forming of lightweight elastic wings. Background technique [0002] The original process method adopts superplastic forming / diffusion connection between the double-sided skin and the core plate, the double-sided skin is in a symmetrical position on the core plate, and the four-layer plate is directly diffused and connected / superplasticized. The process steps are: cutting → acid Washing→coating protective glue, coating solder resist, sealing welding→diffusion connection→superplastic forming→machining shape. This process is prone to core plate tearing, excessive thinning, low flatness of the outer skin, and prone to problems such as steps and grooves. Contents of the invention [0003] In view of this, in order to solve the problems of core plate tearing, excessive thinning, low outer skin flatness, easy steps, groo...

AI Technical Summary

Problems solved by technology

[0003] In view of this, in order to solve the problems of core plate tearing, excessive thinning, low outer skin flatness, easy steps, grooves, etc., the present invention proposes a manufacturing method for lightweight wing superplastic forming, which is suitable for Titanium alloy four-layer structure superplastic forming / diffusion connection, the outer skin surface has high flatness, no step difference, no groove, no narrow neck and no tear at the R angle of the core plate, reducing the problem of excessive thinning of the core plate

Images