Non-cutting machining method of burrs of copper bar holes

Abstract

The invention provides a non-cutting machining method of burrs of copper bar holes. The non-cutting machining method comprises the following steps: arranging the burr surfaces of the copper bar holes downwards so that the copper bar holes are sheathed on the guide surface of a die and the burrs are contacted with the extrusion surface of the die; and pressing a press machine on the upper surface of a copper bar so that the burrs of the copper bar holes are deformed due to extrusion under the extrusion action of the extrusion surface of the die so as to eliminate the burrs of the copper bar holes. The die comprises a forming die body, wherein the upper end of the die body is provided with the guide surface for guiding the movement direction of the copper bar holes, and the lower end of thedie body is provided with a limit surface for limiting the movement distance of the copper bar holes; the guide surface is connected with the limit surface through the oblique extrusion surface; the diameter of the upper end of the extrusion surface is smaller than that of the lower end of the extrusion surface; and the guide surface and the extrusion surface as well as the copper bar holes have consistent shape. The non-cutting machining method has the advantages of changing the traditional method for removing the burrs of the copper bar holes by scraping and other modes and greatly improving the efficiency and effect for removing the burrs of the copper bar holes, especially the burrs of a long waist hole, a square hole and other profile holes.

Description

technical field [0001] The invention relates to a non-cutting processing method for copper hole burrs. Background technique [0002] Copper bars are the main material of the high and low voltage switchgear busbars. In most applications, bolt connections are used as the main connection method, and bolt connections require opening holes on the interface of copper bars. The main methods of opening holes are as follows : 1. Punching, 2. Hydraulic drilling, 3. Drilling. No matter which method is used to open the hole, burrs will be generated around the bottom of the copper row hole. If the burrs of the copper row holes are not eliminated, the bonding interface of the copper row will not be closely bonded. During the operation of the high and low voltage switchgear, the return resistance of the copper row will increase, the temperature rise will increase, and the oxidation reaction will occur at the bonding interface, which will cause accidents and give The safe operation of hig...

AI Technical Summary

Problems solved by technology

If the burrs of the copper row holes are not eliminated, the bonding interface of the copper row will not be closely bonded. During the operation of the high and low voltage switchgear, the return resistance of the copper row will increase, the temperature rise will increase, and the oxidation reaction will occur at the bonding interface, which will cause accidents and give Hidden dangers caused by safe operation of high and low voltage switchgear

Traditional deburring methods, round holes use drilling and chamfering methods, long waist holes, square holes and other special-shaped holes use scraper scraping or file filing methods, these two methods are inefficient and easy to damage the surface of copper bars, and the deburring effect is not good There is an urgent need to improve the efficiency and effect of removing burrs from copper row holes, especially the burrs in special-shaped holes such as long waist holes and square holes

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