Machining method for large double-layer thin-walled D-shaped section vacuum chamber fan-shaped section end face

Abstract

The invention belongs to the technical field of nickel base alloy double-layer thin-walled structural component machining, and particularly relates to a machining method for a large double-layer thin-walled D-shaped section vacuum chamber fan-shaped section end face. According to the machining method, firstly, a tool is adopted for positioning, the forming error of high-strength alloy panels is effectively avoided, and rigidity is increased through an inner supporting tool; and a circle of waist line is drawn through a platform, and the size error of all spliced sections of a D-shaped section is solved. The influence of the outer arc forming error of the D-shaped section on the 18-degree section is solved through machine tool line drawing. A mold is fixed, a workpiece is positioned and clamped, a base plate is adopted for a force exerting point, and therefore a positioning contact face during machining is enlarged; and meanwhile, a stainless steel plate of a similar shape is manufactured on the positioning contact face to be cushioned at the force exerting point, the contact area is enlarged, and deformation of the product is reduced to the maximum extent. Due to the adoption of the method, the problems that double-layer thin-walled pieces are twisted and folded after being machined, the end face flatness is quite poor and metal fillings fall into interlayer runners can be well solved.

Description

technical field [0001] The invention belongs to the technical field of mechanical processing of nickel-based alloy double-layer thin-walled structural parts, and in particular relates to a method for processing the end face of a segment of a large-scale double-layer thin-walled D-shaped cross-section vacuum chamber. Background technique [0002] The large-scale double-layer thin-walled D-shaped cross-section vacuum chamber segment is used to manufacture the main component vacuum chamber in the magnetic confinement thermonuclear fusion device. According to the current status of thermonuclear fusion research at home and abroad, the new vacuum chamber is composed of 20 D-shaped segments, each Each D-shaped section is a space double-layer hyperboloid thin-walled structure, which is welded by the inner shell, the channel steel of the runner and the outer shell. [0003] When processing large double-layer thin-walled D-shaped sections, how to prevent twisting, wrinkling, out-of-to...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a method for processing the end face of a segment of a large-scale double-layer thin-walled D-shaped cross-section vacuum chamber to solve the problems of twisting, wrinkling, and flatness of the end face after processing the double-layer thin-walled parts. Ensure that the D segment is manufactured according to the dimensional accuracy and shape accuracy of the drawings, thereby ensuring the manufacturing accuracy of the vacuum chamber and meeting the requirements for magnetic confinement thermonuclear fusion research

Images