Commonly used metal cutting tools in large-scale CNC machining
The machining process of large-scale CNC machine tools includes five steps: determining the process, calculating the tool path coordinates, writing the machining program, inputting the program into the CNC system, and program inspection. It can be asserted that if the machining process is unreasonable, even a high-precision CNC machine cannot produce qualified parts. Therefore, the machining process is very important in cutting operations. The principle of reasonably selecting cutting parameters is to fully utilize the cutting performance of the tool material and the working characteristics of the CNC machine tool. Not only should the quality of the workpiece be guaranteed, but also high productivity and low processing costs should be achieved. Therefore, the selection of cutting parameters should be comprehensively considered and reasonably selected.
The commonly used metal cutting tool materials are high-speed steel and hard alloy. According to domestic standards, hard alloy tool materials are divided into three types: YT, YG, and YW. The corresponding international ISO standards are P, K, and M, which are used for processing steel, cast iron, alloy steel, and difficult-to-machine materials respectively. Common non-metallic tool materials include ceramics, polycrystalline diamond, and cubic boron nitride. Among them, polycrystalline diamond is mainly used for precision machining of wear-resistant and high-hardness non-metallic and non-ferrous alloy materials. Cubic boron nitride is suitable for processing quenched steel, hard cast iron, high-temperature alloys, and hard alloys, and it can replace grinding with turning. To improve the wear resistance and service life of tool materials, the surface of the tool material can be coated with materials such as TiN, TiCN, and Al2O3.
Metal cutting tools for large-scale CNC machining can be divided into three categories: turning tools, milling tools, and hole-making tools. In CNC machining, to improve the efficiency of the machine tool and reduce auxiliary machining time, indexable non-regrinding inserts are widely used. Milling tools have developed into modular combinations, forming a standard series of CNC milling tool systems.
Website reference: http://www.dgwanjun.com