Explanation of commonly used tools in CNC machining(3)

3. Distinguish by tool device

　　 Generally speaking, the milling cutter can be divided into the following two types of milling cutters:

　　 1. Disposable tool

　　 2. Integral tool

　　3.1 Disposable tools

　　 This type of tool, as the name suggests, the blade part of the milling cutter is a replaceable design. Generally, it is divided into two parts: the tool holder and the blade in the design. The blade is the cutting edge of the milling cutter for cutting the workpiece, and the tool holder is used as a fixed or supporting blade. The diameter of the tool holder determines the size of the milling cutter. In addition, the tool holder can also be designed with multiple edges. The blade part has many changes in shape, material...etc. Users can replace suitable blades according to different processing conditions. After all cutting edges on the blades are worn out, the blades are discarded without re-grinding, and only need to be replaced with new blades. Therefore, tool cost and flexibility of use are their advantages.

　　3.2 Integral tool

The integral tool is a design that the blade and the cutter body are integrated. The cutting edge and the milling cutter body on the milling cutter are made of the same material, so the integral tool will be higher than the discarded tool in terms of accuracy and strength of the blade. However, the relative material cost of making the knife will increase, and the knife edge needs to be reground after it is worn out before it can be used again. In addition, considering the strength of the cutting edge and the difficulty of manufacturing, it is extremely difficult to manufacture disposable tools below 10mm, so generally milling cutters below 10mm are integral tools.