Machining method of cylindrical spinning mandrel

Abstract

The invention relates to a machining method of a cylindrical spinning mandrel, belonging to the technical field of machining. The process comprises the following steps of: sampling and physically and chemically analyzing a forgeable piece; forging; spheroidizing; rough machining; carrying out ultrasonic nondestructive detecting; conditioning; half finely turning; distressing and annealing; scribing; boring a hole; hinging a buckle; carrying out thermal treatment; finely turning; grinding the excircle; ultrasonically detecting defects; lapping and polishing. The machining allowance of the forgeable piece before spheroidizing and thermal treatment is confirmed to lay the favorable foundation for ensuring sequential geometric allowance. In the machining method provided by the invention, the processing production of a common lathe is fully utilized, and the machining allowance can meet use performance through reliable processing flows; and the mandrel manufactured by using the process has long service life and can be widely applied to the manufacture and the production of the cylindrical mandrel as a key part in spinning machining.

Description

technical field [0001] The invention relates to a processing method of a cylindrical spinning mandrel, which belongs to the technical field of mechanical processing. Background technique [0002] The development of contemporary aviation, aerospace, weapons, automobiles and high-tech industries has made special-shaped thin-walled shell parts widely used. Special-shaped thin-walled shell parts adopt powerful spinning technology, which has the advantages of high product precision, good performance, high material utilization, low cost, small required equipment capacity and high process flexibility. field plays an important role. [0003] The processing of cylindrical thin-walled parts generally adopts core mold spinning, and the core mold is the main part that determines the size and accuracy of the product. In order to ensure the quality of the workpiece being rotated, the core mold must have sufficient strength, rigidity and surface quality. When the core mold is long, its p...

AI Technical Summary

Problems solved by technology

It is difficult for ordinary heat treatment workshops to meet their requirements, so it is particularly important to choose more suitable materials to replace them.

In addition, the long cylindrical spinning core mold workpiece will also bring great difficulties to the adjustment of the machining and heat treatment process allowance. If you want to ensure the flatness, cylindricity, and end face circle required in the drawing during the machining process A series of auxiliary operations and processing skills are required for row position tolerances such as runout and radial circular runout, which involve the reasonable design of the tapered sample column, the determination of the reasonable position of the clamped workpiece, the machining allowance before and after heat treatment, and the processing technology. Reasonable arrangement, etc.

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