Hot stretch forming method for shunt shell

Abstract

The invention discloses a hot stretch forming method for a shunt shell, and belongs to the technical field of aero-engine shunt machining. The method comprises the following steps that A, blanking isconducted, specifically, a TC1 plate is adopted for blanking, and a circular-ring-shaped blank is prepared; B, primary hot stretch forming is conducted, specifically, under the cooperation of a hot press machine and a mold A, the circular-ring-shaped blank is subjected to hot stretch forming to obtain an outer ring plate, and a semi-finished product A is prepared; C, secondary hot stretch formingis conducted, specifically, under the cooperation of the hot press machine and a mold B, the semi-finished product A is subjected to hot stretch forming to obtain an inner ring plate, the connecting position of the inner ring plate and the outer ring plate is in arc smooth transition, and a semi-finished product B is prepared; and D, trimming is conducted, specifically, redundant materials on thesemi-finished product B are cut off, and the shunt shell is prepared. Hot stretch forming is carried out through the mold A to obtain the outer ring plate of the shunt shell firstly, then hot stretchforming is carried out through the mold B to obtain the inner ring plate of the shunt shell and the arc transition section of the outer ring plate and the inner ring plate, and the problems that wrinkling is easy to occur and the materials are thinned during shunt shell forming are solved.

Description

technical field [0001] The invention relates to a thermal stretch forming method for a shunt shell, belonging to the technical field of aero-engine shunt processing. Background technique [0002] Such as figure 1 As shown, the diverter housing 1 of an aero-engine is a ring-shaped sheet metal part with a V-shaped cross section. Made of titanium alloy TC1 material, the wall thickness is 1mm. Because titanium alloy has strong toughness, high viscosity, poor moisture and heat conduction, small elastic modulus, and strong chemical affinity at room temperature, it is difficult to form titanium alloy parts at room temperature, and the forming accuracy is not high. Titanium alloy thermoforming is to use the properties of titanium alloy heating and softening to reduce the deformation resistance of the sheet, increase the deformation degree of the sheet during the forming process, reduce elasticity, and improve the forming accuracy of the parts. Due to the small included angle of t...

AI Technical Summary

Problems solved by technology

The present invention proposes a hot stretch forming method to solve the problem of difficulty in forming the shell 1 of this type of titanium alloy shunt

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