Method of machining C-shaped central hole by using ordinary tool

Abstract

The invention relates to a method for machining a C-shaped central hole by using an ordinary tool, which belongs to the technical field of machining. The method comprises six steps of central positioning, drilling a pre-manufactured hole, drilling a bottom hole, drilling a D1 hole, tapping a screw hole and drilling a D2 hole mouth part, and the method is operated according to the following steps:step 1, using a B-shaped central drill for machining a central positioning hole; step 2, using a first drill bit for drilling the pre-manufactured hole; step 3, using a second drill bit for preciselydrilling the bottom hole, and leading the depth to achieve the depth required by the standard; step 4, using a third drill bit for precisely drilling the hole with D1 size; step 5, using a screw tap for tapping an internal thread; and step 6, using the B-shaped central drill for drilling a conical surface of the hole mouth part with D2 size. When in the procedure of using the method for machiningthe C-shaped central hole, the procedure does not need to buy a C-shaped central drill, the commonly used B-shaped central drill, the drill bit and the screw tap can be used for machining the C-shapedcentral hole which is in line with the standard, thereby reducing the cost and simultaneously ensuring the precision of machining parts to be in line with the requirements of the standard.

Description

technical field [0001] The invention belongs to the technical field of machining, and in particular relates to a method for machining a C-shaped center hole on a shaft head of a workpiece. Background technique [0002] In the machining industry, the existing method of machining a C-type center hole on the workpiece shaft head generally uses a very expensive C-type center drill. Since the C-type center drill is a standard tool made of a compound similar to the B-type center drill and a tap, it is produced by a professional tool factory. Therefore, the price is very high, about several hundred yuan each. When workers use it on a lathe, it is not ideal to use due to the structural complexity of the C-type center hole. The problem that occurs is that the C-type center hole drill bit is often broken in the center hole, and it happens repeatedly. The center drill bit is broken in the center hole, and it is difficult to remove the broken end from the hole. At the same time, the r...

AI Technical Summary

Problems solved by technology

When workers use the lathe, due to the complexity of the structure of the C-shaped center hole, it is not ideal to use. The problem that occurs is that the C-type center hole drill bit is often broken in the center hole, and it happens frequently.

The center drill bit is broken in the center hole, and it is difficult to remove the broken end from the hole. At the same time, the raw material of the shaft is scrapped, which makes the cost of drilling a C-shaped center hole very high.

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