High-accuracy thin-wall bush machining method

Abstract

The invention provides a high-accuracy thin-wall bush machining method. The high-accuracy thin-wall bush machining method comprises the following steps of (1) rough machining which comprises enabling the excircle size of a bush to be provided with the margin of 1 to 1.5mm and enabling the inner hole size of the bush to be provided with the margin of 0.3 to 0.5mm; (2) finish machining an inner hole; (3) semi finish machining the excircle, clamping the bush through a first core rod and enabling the excircle size after semi finish machining to be provided with the margin of 0.1 to 0.15mm; (4) finish machining the excircle, clamping the bush through a second core rod and enabling an insertion end of the head of the second core rod to be provided with the gradient from 0 to 0.041 degree. The high-accuracy thin-wall bush machining method can effectively solve the influences generated by pressure when a lathe chuck clamps the bush to the bush size and the coaxiality and accordingly the quality of the batch production thin wall bush when the machining accuracy requirement is high.

Description

technical field [0001] The invention relates to a processing method of a high-precision thin-walled bush, which is used to ensure the quality of mass-produced thin-walled bushes when high-precision processing is required. Background technique [0002] When ordinary bushings are processed in batches for a long time, the most commonly used method is to use long bars, process the inner hole first, and after processing, the head is clamped by a three-jaw chuck, and the tail end is supported by a lathe tailstock, and then Process the outer circle and finally cut it to length. [0003] When the bushing wall is thin to a certain extent (such as 1mm), some problems will arise: 1. The bushing wall is thin, the force on the inner hole is poor, and the outer circle of the inner hole is irregularly deformed; 2. The workpiece is clamped in the three-jaw There is a difference between the size measured when the chuck is removed and the size after removal. Although such deformation and di...

AI Technical Summary

Problems solved by technology

[0003] When the bushing wall is thin to a certain extent (such as 1mm), some problems will arise: 1. The bushing wall is thin, the force on the inner hole is poor, and the outer circle of the inner hole is irregularly deformed; 2. The workpiece is clamped in the three-jaw There is a difference between the measured size of the chuck and the size after removal

Although such deformation and dimensional changes, the lathe staff will be very careful about the clamping force of the chuck when processing the bushing. Through this operation, the deformation of the workpiece due to clamping can be effectively controlled, but for For example, for the high-precision bronze thin-walled bushing of the hinge bushing, this conventional method cannot guarantee the size and coaxiality of the outer circle and inner hole of the part, so it is necessary to use tooling and improve the key technology

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