Machining method and device for multi-layer membrane structure corrugated pipe

Abstract

The invention discloses a machining method and device for a multi-layer membrane structure corrugated pipe, and belongs to the technical field of corrugated pipe manufacturing. The method and device overcome the defects that a corrugated pipe manufactured through a conventional method has the short fatigue life, and is low in strength and compression rate, poor in geometric accuracy and the like. The method comprises the following steps that firstly, an annular membrane is obtained through machining; secondly, chemical milling is carried out on the surface of one side of one part of the annular membrane to form an annular concave part, and a stress concentration weakening membrane is formed; thirdly, the accurate definition of a diffusion bonding area and a non-diffusion bonding area is ensured through the sample plate shape carving step; and thirdly, an upper corrugated pipe flange, a lower corrugated pipe flange, an original specification membrane and the stress concentration weakening membrane are assembled according to a certain sequence, and diffusion bonding is finished. According to the machining method and device, machining of the multi-layer membrane structure corrugated pipe is achieved through the diffusion welding and stress relaxation combining technology method; and meanwhile the stress concentration weakening processing method is adopted for eliminating the stress concentration phenomenon produced in the corrugated pipe working process, and the fatigue life of the corrugated pipe is greatly prolonged.

Description

technical field [0001] The invention belongs to the technical field of bellows manufacture, and relates to a processing method and device for a multilayer diaphragm structure bellows. Background technique [0002] Commonly used bellows are generally manufactured by welding after split forming or melting welding after forming diaphragm. The process is complicated, the uniformity of wall thickness is not easy to control, and the compensation performance and fatigue resistance are average. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a method and device for processing bellows with a multi-layer diaphragm structure. The method and device overcome the problems of low fatigue life, low strength, poor compression rate and geometric accuracy of bellows manufactured by conventional methods, etc. Disadvantages: The present invention proposes the use of diffusion welding and stress relaxation composite technology to real...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a method and device for processing bellows with a multi-layer diaphragm structure. The method and device overcome the problems of low fatigue life, low strength, poor compression rate and geometric accuracy of bellows manufactured by conventional methods, etc. Disadvantages: The present invention proposes the use of diffusion welding and stress relaxation composite technology to realize the processing of multi-layer diaphragm structure bellows, and at the same time adopts the stress concentration weakening treatment method to eliminate the stress concentration phenomenon generated in the working process of the bellows, greatly improving the corrugation. Tube fatigue life, also provides a device for diffusion welding of bellows diaphragm

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