Machining method for stainless steel deep-hole thin-wall part

Abstract

The invention relates to the field of machining, in particular to a machining method for a stainless steel deep-hole thin-wall part. The machining method includes the following steps that proper blankmaterials are selected and subjected to annealing treatment, and the cutting machining performance of the materials is improved; rough turning is carried out to remove the machining allowance of a blank, and an inner hole of a workpiece is machined through a corresponding deep hole internal spraying and sucking drill bit on special equipment; heat treatment and quenching are carried out; the outline of the workpiece is clamped, and an end surface of the workpiece is turned; a guide hole and a chamfer are turned; boring and reaming are carried out, the number of boring and reaming times is determined according to the machining allowance and is usually two to four, according to the characteristics of the part, after two times of boring and one time of reaming on a special deep hole drillingand boring machine, the inner hole is machined to have certain machining allowance, the inner hole is machined to have the required size finally, and cooling lubricating oil is adopted in the machining process. The machining method can guarantee the precision requirement of the workpiece, quality is stable and reliable, machining difficulty is lowered, production efficiency is improved, and laborintensity of workers is relieved.

Description

technical field [0001] The invention relates to the field of mechanical processing, in particular to a processing method for stainless steel deep-hole thin-walled parts. Background technique [0002] As a highly professional and difficult machining method, deep hole machining is widely used in aviation, aerospace and other military industries. Its machining accuracy directly affects the performance of products, especially with new high-strength and high-hardness materials such as Difficult-to-machine materials such as titanium alloy, stainless steel, and heat-resistant steel are used more and more, which puts forward higher requirements for deep hole processing. Therefore, for difficult-to-machine materials, how to improve the precision of deep hole machining has become a hot issue in machining. [0003] The material of the part has high hardness and is difficult to process. In the actual processing process, there are mainly the following difficulties: (1) The workpiece is ...

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Problems solved by technology

(2) The workpiece belongs to nickel-based alloy, which has extremely poor thermal conductivity. When cutting, the heat is concentrated on the back corner of the cutting edge, resulting in plastic deformation, bonding and diffusion wear of the cutting edge.

(3) Work hardening is easy to occur in the process of workpiece processing, which intensifies the wear of the tool, increases the surface roughness value, greatly reduces the tool life, and causes serious tool loss

(4) During deep hole machining, the sliding distance of chip removal on the rake face is long, the chip is easy to rub and squeeze with the hole wall, the cutting temperature rises, and the surface of the inner hole is strained, which is not conducive to the accuracy and surface roughness of the hole degree guarantee

(5) The length-to-diameter ratio of the inner hole is 1:10, which belongs to deep hole and thin-walled parts, and requires high precision, which is difficult to guarantee by conventional processing methods