Machining method of micro deep hole of steel with carbon content of less than or equal to 0.6%

Abstract

The invention discloses a machining method of a micro deep hole of steel with the carbon content of less than or equal to 0.6%. According to the machining method of the micro deep hole, a workpiece formed by steel with the carbon content of less than or equal to 0.6% is taken as a machined object. The technological measures adopted by the machining method of the micro deep hole comprises the following steps that a five-axis linkage high-speed machining center serves as a machining machine tool, a hard alloy key groove milling cutter is adopted for milling a positioning face on the surface of adesigned opening position on the workpiece, a hard alloy miniature drill bit is adopted for machining a hole pattern meeting the design requirement on the positioning face of the workpiece in a high-speed pecking drilling mode, and a high-pressure cooling liquid is added in the high-speed pecking drilling machining process. According to the machining method, the micro deep hole of the steel withthe carbon content of less than or equal to 0.6% (especially of stainless steel) is machined, the machining efficiency is improved, the machining period is greatly shortened, the machining yield and the machining precision are increased, the machined micro deep hole can effectively meet the technical requirements of the use environment, and meanwhile, the machining cost is effectively reduced.

Description

technical field [0001] The invention relates to a method for processing tiny deep holes on steel, in particular to a tiny deep hole (especially a normal or oblique angle) on steel (such as stainless steel, medium carbon steel or low carbon steel, etc.) Micro deep hole) processing method. Background technique [0002] In the component parts of precision industrial equipment (such as aviation equipment, etc.), steel with a carbon content of ≤0.6%, especially stainless steel, has been widely used. [0003] Some of the component parts of precision industrial equipment need to make tiny deep holes in the normal direction or oblique angle (usually, holes with a diameter of 0.3 to 1mm are classified as small holes; holes with a diameter of ≤0.3mm are classified as small holes. Micro holes; the holes satisfying the relationship 5≤L / D≤20 are general deep holes; the holes satisfying the relationship 20≤L / D≤30 are medium deep holes; the holes satisfying the relationship 30≤L / D≤100 It...

AI Technical Summary

Problems solved by technology

First, special drilling jigs are used as the core to cooperate with ordinary machining centers for processing, which will require the production of corresponding drilling jigs for the processing of small deep holes in the normal direction or oblique angle of different types of parts. The processing cycle is long, the processing efficiency is not high, and the cost is high. High; in addition, due to the low rotation speed of the main shaft of the ordinary machining center (usually the highest rotation speed is 8000~10000r / min), it cannot provide sufficient processing line speed in the micro deep hole drilling process, which may easily cause the micro drill bit to break. At the same time, the insufficient pressure of the cooling system cannot provide a good heat dissipation and chip removal environment, and also increases the risk of micro-drill breaking, which leads to low yield and further increases processing costs.

Second, processing with special methods such as laser processing, plasma beam processing, and electric processing, although its processing efficiency is high, there is no technical problem of drill bit breaking, but these special processing methods are due to the particularity of the processing process. The hole section of the machined pass presents irregular technical problems, and the technical precision is difficult to meet the technical requirements of precision parts

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