Technical development of copper processing machine

High and low voltage switchgear and power transmission and transformation equipment are indispensable power distribution facilities in the power industry and manufacturing industry. Copper distribution is required for high current transmission and distribution between power distribution devices. The copper bars are rectangular or chamfered in cross section (rounded corners) The rectangular long conductor plays the role of connecting current and connecting electrical equipment in the circuit. Generally, the U, V, W phase busbars and PE busbars in the power distribution cabinet are all made of copper. The processing quality of the copper bars directly affects The accuracy of wire installation even affects the quality and function of circuit transmission. Therefore, the research and design of copper row processing equipment has important practical production significance.
    The copper row processing machine is generally composed of three stations: punching, bending and shearing. It is driven by hydraulic pressure and realizes the control of each process by PLC. It can automatically complete the punching, bending and shearing process of the copper row. It is a high-efficiency small machine tool for mass processing of busbars in the electrical industry. As one of the three main stations, the shearing station has the function of cutting the copper bars with a width of 20~140mm and a thickness of 3~15mm and ensuring the cutting. Smooth and the verticality of the section, the station is the focus and difficulty in the design of the copper processing machine.
    1. Insufficient design of existing shearing station The function of the shearing station is mainly to complete the shearing process of the copper row. The requirement of the shear quality in this design is to ensure the smoothness of the cut section and the high verticality.
    It has been found that most of the existing copper bar processing machine shearing stations in the market adopt the general dislocation shearing technology. As a result, the incisions are often uneven, and the verticality of the upper and lower planes of the copper bar is not enough, and the shearing precision is poor. The structure of the mold frame on which the shearing tool is installed adopts a "U"-shaped frame structure, which has defects such as uneven force and easy deformation after long-term use, so that the cutting precision cannot be guaranteed.
    Therefore, in the design of the copper row processing machine shearing station, in this paper, in view of the above deficiencies, the cutting method, tool structure, mold structure and other aspects have made significant improvements.
    2, the design of the copper processing machine shear station
    2.1 Shear technology The current cutting technology is divided into misaligned shearing and punching.
    2.1.1 Misalignment Shearing The cutting method adopted by most copper bar processing machines is a misalignment shearing. This makes the design of the mold simple and easy to cut, easy for the user to understand, operate and maintain. The incision is often uneven, the smooth area of ​​the incision is small, and the incision is inclined, which cannot meet the requirements of use.
    2.1.2 Punching After investigation and related data analysis, the design adopts the punching and shearing method. This processing method is more similar to punching than shearing, but the shape of the punching is a very narrow rectangle, which is a kind. Closed shear. When punching and shearing, because both sides of the cutting edge of the tool are in contact with the copper row, the two sides are symmetrical, so the uniformity and quality of the processed copper row cut are better than the former.