A processing method for high-precision stepped deep-hole parts

Abstract

The invention specifically discloses a machining method of a high-precision step deep hole part, and solves the problems of weak straightness and incapability of guaranteeing the size and shape precision in a traditional boring process of the step deep hole part. The machining method comprises the following steps: (1) the deep hole part is divided into a part body I and a part body II; (b) an inner hole of the part body I is machined as a finished hole; the outer circle leaves a working allowance; then, an inner hole of the part body II is machined; the outer circle leaves a working allowance; and then, the part body II is welded with the part body I; (c) after welding, a plug is pressed in an outer end hole of the part body II; a center hole is formed in the outer end surface of the plug; and the outer circles of the part body I and the part body II are machined to reach the size of a finished product; (d) a guide cylinder is manufactured; and (e) the inner hole of the part body II is roughly bored and finely bored. The straightness of the part reaches the stated technical requirement; and the problem of deformation of a thin-wall part is prevented.

Description

technical field [0001] The invention relates to the field of deep hole boring processing of mechanical parts, in particular to a processing method for high-precision stepped deep hole parts. Background technique [0002] Generally, a hole whose length L to diameter D ratio L / D>10 is called a deep hole. Compared with general hole processing, deep hole processing has the problems of low production efficiency and high difficulty. Deep hole drilling and boring machine is a special machine tool for deep hole boring. With the development of technology, deep hole boring machine has made great progress in processing through-hole parts in terms of processing accuracy and production efficiency. The straightness of the machined parts is not very high due to the structural characteristics of the deep hole drilling and boring machine. [0003] However, for the processing of step and deep hole parts, the traditional boring process has the following defects: 1. The hydraulic pressure o...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of poor straightness and inability to guarantee the size and shape and position accuracy of step deep hole parts using traditional boring technology, the present invention provides a high-precision step deep hole processing method

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