What are the six commonly used milling cutters for precision parts machining?

There are many types of milling cutters in precision parts machining, but only the following are commonly used. (1) Face milling cutter: The face milling cutter has cutting edges on both the circular surface and the straight end, with the end cutting edge being the secondary cutting edge. Face milling cutters are often made with a nested tooth structure, and the teeth are made of high-speed steel or hard alloy. Compared with high-speed steel milling cutters, hard alloy face milling cutters have faster cleaning speed, higher processing efficiency, and better surface quality. ​ (2) End mill: End mill is the most commonly used milling cutter in precision parts machining. Its structure has cutting edges on both the cylindrical surface and the end face, which can be cut simultaneously or separately. The cutting edge on the cylindrical surface of the end mill is the main cutting edge, and the cutting edge on the end face is the secondary cutting edge. The main cutting tool is a spiral tooth, which can increase cutting smoothness and improve machining accuracy. (3) Mold milling cutters: Mold milling cutters are developed from end mills and can be divided into three types: conical end mills, cylindrical ball end end mills, and conical ball end mills. Their shank includes straight shank, flattened straight shank, and Mohs cone shank. Its structural feature is that the ball head or end face is covered with cutting edges, and the circumferential edge is connected to the circular arc of the ball head edge, which can be used for radial and axial feed. The working part of the milling cutter is made of high-speed steel or hard alloy. (4) Keyway milling cutter: A keyway milling cutter has two teeth, with cutting edges on both the cylindrical and end faces. The end face edge extends to the center, resembling both an end mill and a drill bit. During processing, first feed axially to the groove depth, and then mill the entire length of the keyway along the direction of the keyway. (5) Drum shaped milling cutter: Its cutting edge is distributed on the circular arc surface, and the end face has no cutting edge. By controlling the up and down position of the cutting tool during processing and changing the cutting position of the cutting edge accordingly, different oblique angles from negative to positive can be cut on the workpiece. The drum shape has a wide range of processing capabilities, but the poorer the surface quality obtained. The disadvantage of this type of tool is that it is difficult to grind, has poor cutting conditions, and is not suitable for machining bottomed contour surfaces. (6) Forming milling cutter: Forming milling cutters are generally specially designed and manufactured for specific workpieces or machining contents, such as angle surfaces, grooves, special holes or platforms. In addition to the above milling cutters, various general-purpose milling cutters can be used for precision part machining. However, due to the special position of the cutting tool in the spindle of many machine tools, or the different taper holes in the spindle, transition sleeves and rivets must be equipped.