Adjustable self-centering inner supporting device for machining thin-wall tubular part

Abstract

The invention discloses an adjustable self-centering inner supporting device for machining a thin-wall tubular part. The adjustable self-centering inner supporting device for machining the thin-wall tubular part is characterized in that the adjustable self-centering inner supporting device comprises an outer cylinder, a core shaft and at least three supporting bar blocks, guide grooves which are matched with the supporting bar blocks respectively are formed in the outer cylinder, a conical shaft section which is inserted into the outer cylinder and a circular shaft section which is exposed out of the outer cylinder are arranged on the core shaft, conical threads are formed in the conical shaft section, a pull tool connecting structure is arranged at the outer end portion of the conical shaft section, a tip hole is formed in the outer end face of the circular shaft section, the conical shaft section is connected with the supporting bar blocks in a threaded mode, the supporting bar blocks are arranged in the guide grooves in the outer cylinder respectively, the supporting bar blocks are matched with the guide grooves in the outer cylinder respectively in a sliding mode, the supporting bar blocks are evenly distributed in the circumferential direction of the outer cylinder, the outer surface of each supporting bar block is exposed out of the outer circumferential face of the outer cylinder, the cross section of the outer surface of each supporting bar block is in an arc shape, and the supporting portions of the outer surfaces of all the supporting bar blocks are placed in the cylindrical face concentric with the outer cylinder. The adjustable self-centering inner supporting device is convenient to use and low in cost.

Description

technical field [0001] The invention relates to a tooling for processing thin-walled tubular parts, in particular to an adjustable self-centering inner support device for processing thin-walled tubular parts. Background technique [0002] When thin-walled tubular parts are turning and processing the outer circle, due to their own hollow structure, the impact force of the Z-direction feed of the turning tool and other forces in the processing process, it is easy to cause deformation of the part, which affects the roundness and coaxiality of the part. Degree and other processing accuracy. Therefore, for thin-walled tubular parts, measures should be taken to prevent processing deformation or correct deformation during processing. The general preventive measure is to change the processing parameters, but such a change can only reduce the deformation to a certain extent and also reduce the processing efficiency, prolong the processing time, and increase the possibility of therma...

AI Technical Summary

Problems solved by technology

General internal support mechanisms lack adjustability and have particularly high requirements for centering, these shortcomings limit their applicability to a certain extent

The use of new materials such as expandable materials as internal supports requires high requirements on the performance of the materials, which must not only be expandable but also resistant to high temperatures, and at the same time be able to withstand the complex environmental tests in the processing process. difficult and expensive

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