High-strength steel precise taper hole machining method

Abstract

The invention discloses a high-strength steel precise taper hole machining method. The high-strength steel precise taper hole machining method comprises the following steps that surface lubrication treatment is carried out, specifically, a steel sheet is soaked by hydrochloric acid or a sulfuric acid water solution, the steel sheet is washed thoroughly after an oxidation layer is removed, and thenthe steel sheet is put into a neutralization tank to be neutralized; the thoroughly-pickled steel sheet is put into a prepared phosphating solution for phosphorization treatment, after phosphatization, the steel sheet is washed thoroughly and put into a saponification tank for saponification, and then the steel sheet is subjected to drawing after being naturally drained; and cold drawing is carried out, specifically, a hydraulic drawing machine is used for enabling the steel sheet to be deformed in a set internal die and a set external die, the precise size requirement is met, the metal steelsheet is reinforced after cold deformation, the cold drawing purpose is to eliminate the problems that a hot-rolled wall is thick and the surface quality defects exist through cold drawing, and meanwhile, the deformation amount of cold drawing of the finished product is determined, and the mechanical property and the like are controlled. According to the high-strength steel precise taper hole machining method, the machining precision of a taper hole is improved, the machining efficiency of the taper hole is improved, and the precision and the smoothness of the inner taper hole can be guaranteed; and the concentricity for arranging a rudder stock and a rudder pintle into the steel sheet can be improved, so that the quality of the steel sheet is ensured, and the good economic benefits are obtained.

Description

technical field [0001] The invention relates to a machining method for a taper hole, in particular to a machining method for a high-strength steel precision taper hole. Background technique [0002] In the field of aviation manufacturing, high-strength steel is often used as structural parts. The taper hole is processed after heat treatment. The hardness of the material is high, and the taper hole is drilled by EDM. There are the following technical defects: the precision of electric spark taper hole is low, it is difficult to guarantee the accuracy requirement, the hole is bell mouth, the roughness is low, the surface roughness is improved after grinding, but the state of the hole bell mouth is not improved; and ordinary The hardness of the white steel knife is not enough. The bonding surface between the taper surface and the tool is long, and the tool is easily broken due to the large torque; therefore, we need a high-strength steel precision taper hole processing method....

AI Technical Summary

Problems solved by technology

There are the following technical defects: the precision of electric spark taper hole is low, it is difficult to guarantee the accuracy requirement, the hole is bell mouth, the roughness is low, the surface roughness is improved after grinding, but the state of the hole bell mouth is not improved; and ordinary The hardness of the white steel knife is not enough

The bonding surface between the taper surface and the tool is long, and the tool is easily broken due to the large torque; therefore, we need a high-strength steel precision taper hole machining method