Machining method of long-and-thin walled cylindrical component

Abstract

The invention provides a machining method of a long-and-thin walled cylindrical component, and belongs to the technical field of machining of cylindrical components. The method comprises the following steps: carrying out rough machining to obtain a rough machining workpiece with a chuck; carrying out quenching and tempering treatment on the workpiece subjected to rough machining; carrying out ultrasonic flaw detection on the workpiece; carrying out rough turning and half finished turning of the workpiece; carrying out stress elimination treatment on the workpiece; caryring out finished turning of the workpiece; placing a circular disc shaped support part in an inner hole of a chuck end; clamping the chuck; carrying out finished turning of an outer circle and the inner hole; radially cutting a groove on the outer circle of the workpiece close to the chuck part; then carrying out finished turning of the inner hole and the end surface of the other end to a designed size; finally, cutting off the end provided with the chuck; milling and cutting off the end surface of the workpiece of the chuck end to the length of the workpiece to meet the design requirement. According to the machining method of the long-and-thin walled cylindrical component, the deformation of the workpiece during clamping can be avoided, the machining stress of the workpiece can be effectively released, and the situation that coaxial degree of the workpiece meets the design requirement can be guaranteed.

Description

technical field [0001] The invention relates to the technical field of processing cylindrical parts, in particular to a processing method for long and thin-walled cylindrical parts. Background technique [0002] The centrifugal compressor rotor is composed of multiple parts, some of which are long and thin-walled cylindrical structures, and their specifications are usually 150mm-200mm in outer diameter, 10mm-15mm in wall thickness, and 300mm-400mm in length. Common grades of materials are 12Cr13, 45#, 25Cr2Ni3Mo forgings. [0003] The current method of processing such long and thin-walled cylindrical parts usually adopts the processing process of rough machining→rough turning→finish turning. In the finishing process of this processing method, each part of the long and thin-walled cylindrical part is often processed to the amount at one time, and the stress generated during processing cannot be released. When clamping the chuck at one end and the outer diameter of the other ...

AI Technical Summary

Problems solved by technology

In the finishing process of this processing method, each part of the long and thin-walled cylindrical part is often processed to the amount at one time, and the stress generated during processing cannot be released. When clamping the chuck at one end and the outer diameter of the other end, due to the cylindrical The wall thickness of the part is small, and it is easy to deform during the clamping process, and the shape and position tolerances such as coaxiality during the finishing process are often difficult to meet the design requirements

In this way, the interference fit of the long and thin-walled cylindrical parts is not up to standard during the final assembly procedure, resulting in failure of the operation test of the rotor and even the complete machine in the factory.

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