A Spinning Method for Revolving Curved Surface Parts with Front and Back Mounting Edges

Abstract

The invention discloses a rotary pressing method of a rotation curve part with front and back mounting sides. The method comprises the steps that firstly, a forge part is turned into the size before rotation; secondly, a middle segment is rotatably pressed, the large end back face of the part is turned into a step face, meanwhile, a step on the end face of a mould is removed, the back face of a large mounting side is attached to the end face of the mould, the axis of the part and the axis of the mould are kept parallel, and the edge of the outer circle of the small end of the part is chamfered; thirdly, the rotary pressing face serves as the turning standard, the non-rotary-pressing segment is subject to finish turning machining, through control over the thickness reduction of the wall thickness, the rotary pressing elongation amount is stabilized, through the theoretical analysis and the rotary pressing test, the shape face structure and the positioning compressing manner of the rotary pressing mould are determined, the rotary pressing elongation is changed in the required direction, and therefore the shape face distortion is prevented, the traditional thought that part machining depends on large and small end positioning is broken through, the new thought that the curve serves as the machining standard is created, and coordinating and unifying between the rotary pressing shape face and the machining surface are achieved.

Description

【Technical field】 [0001] The invention belongs to the field of aviation manufacturing and belongs to the category of mechanical processing, and relates to a spinning method of a rotary curved surface part with front and rear mounting edges. 【Background technique】 [0002] The main part of the inner casing of the aero-engine combustor casing is welded by electron beams in the front and rear sections, and the blanks of the two sections are GH141 forgings. The design requires that the middle part of the front section of the inner sleeve be strengthened by spinning to improve the strength, hardness and fatigue resistance. [0003] Due to the special structure of the part and the unevenness of the spinning deformation, the spinning deformation of the front section of the inner sleeve is very large, which causes the deformation of the non-spinning section to be also large. Due to the lack of experience in forging blank spinning and the technical data that can be used for referenc...

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to propose a method for spinning curved surface parts with front and rear mounting edges, which solves the problems of inner sleeve spinning cracks, large profile and unstable spinning elongation, and realizes the processing requirements of components

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