Mandrel special for processing slender and thin-walled parts

Abstract

The invention discloses a mandrel special for processing slender and thin-walled pipe parts. The mandrel includes a mandrel body, the mandrel body includes a left end part, a middle section and a right end part, the end part, the middle section and the right end part are cylinders, and the diameter of the left end part and the diameter of the right end part are equal and smaller than the diameterof the middle section; a left fastening device is arranged at the left end part of the mandrel, and a right fastening device is arranged at the right end part of the mandrel; and the mandrel body is coaxially provided with a plurality of elastic sleeves, the elastic sleeves includes inner elastic sleeves and outer elastic sleeves, the inner elastic sleeves coaxially sleeve the mandrel body, and the outer elastic sleeves coaxially sleeve the inner elastic sleeves. The mandrel is high in processing accuracy, compact and practical in structure, good in positioning accuracy and convenient to operate.

Description

technical field [0001] The invention belongs to the technical field of mechanical processing, in particular to a special mandrel for processing slender and thin-walled pipe parts. Background technique [0002] Thin-walled pipe parts are widely used because of their good corrosion resistance, high temperature strength, good heat radiation resistance, strong impact resistance, material saving and light weight. However, the machining of thin-walled tubular parts is difficult, and it is a difficult problem in the field of machining to ensure high machining accuracy, especially for thin and thin-walled tubular parts used in space nuclear power plants, which require higher precision. Processing is more difficult. The processing of thin-walled pipe parts has the following problems: 1) The elastic modulus of thin-walled pipe parts is small, and under the action of cutting force and clamping force, it is easy to produce large elastic deformation, which affects the processing accurac...

AI Technical Summary

Problems solved by technology

However, it is difficult to machine thin-walled tubular parts. It is a difficult problem in the field of mechanical processing to ensure high machining accuracy. Especially for thin and thin-walled tubular parts used in space nuclear power devices, the precision requirements are higher. Processing is more difficult

The processing of thin-walled pipe parts has the following problems: 1) The elastic modulus of thin-walled pipe parts is small, and under the action of cutting force and clamping force, it is easy to produce large elastic deformation, which affects the processing accuracy; 2 ) During the machining process, under the action of alternating cutting force, thin-walled tubular parts are prone to produce resonance phenomena that are not conducive to machining, leaving vibration marks on the machined surface, thereby affecting the surface roughness and dimensional accuracy of the workpiece; 3) Thin-walled pipe parts have a large aspect ratio, which is prone to clamping deformation, difficult positioning during processing, and difficult clamping

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