The selection of cutting tools for CNC machining is carried out under the technical condition of human-computer interaction technology in the programming of machining center. Cutting tools and collets shall be properly used according to the production and processing professional capacity of the machining center, the characteristics of workpiece raw materials of commodity products, production process, cutting performance and other relevant factors.

The general specifications for the selection of CNC machining tools are: convenient and fast installation and adjustment, good bending stiffness, wear resistance and high precision. Under the necessary condition of considering the production and processing requirements, the shorter collet should be selected as far as possible to improve the bending stiffness of the tool. When selecting the cutting tool, the specification and model of the cutting tool shall be consistent with the surface specification and model of the workpiece of the commodity product to be processed. In the production and processing, alloy milling cutter is often used for the production and processing of the contour around the parts of the plane design drawing; When drilling the plane design drawing, the turning tool of carbide tool blade shall be taken; Select tool steel alloy milling cutter when manufacturing die base and concave groove; Corn turning tools with carbide inserts can be selected when processing the surface layer of the blank or the initial hole; Ball cage turning tools, ring turning tools, cone turning tools and disc turning tools are often used in the production and processing of the modeling design of some platform shaped surfaces and variable inclination wheel galleries.

During the production and processing of random slope, the durability of the top tool of the ball cage cutter is zero. Therefore, in order to ensure the production and processing accuracy, the milling row spacing is generally very dense, so the ball cage is often used in the deep processing of slope. The round mouth cutter is better than the ball cage cutter in terms of surface production and processing quality and high milling efficiency. Therefore, if it is necessary to ensure cutting, whether it is the preliminary processing or deep processing of the slope, the round mouth cutter should be selected first.

In addition, the wear resistance and accuracy of CNC machining tools have a great relationship with the tool price. It should be noted that in most cases, although the selection of good tools increases the tool cost, the resulting high production and processing quality and efficiency can greatly reduce all production and processing costs. In the production and processing management office, various cutting tools are installed on the NC cutting tools respectively, and the tool selection and tool change attitude are strictly carried out at any time according to the regulations. Therefore, the standard collet shall be used as much as possible, which is conducive to the rapid and accurate installation of standard tools used in drilling, boring, expanding, drilling and other production processes to the lathe spindle or NC tool. The mobile phone software program should grasp the structure specifications, adjustment methods and adjustment ranges of the common collets on the machining center, which is conducive to establishing the axial and radial specifications of CNC machining tools when writing the program flow.