The cutter is a special tool for milling the workpiece forming surface. Its blade shape is calculated according to the workpiece profile design, it has a high productivity, and to ensure that the workpiece shape and size of the interchangeability, it is widely used. Forming cutter can be divided into two kinds of teeth and pointed teeth.

      1. Fingers Milling Cutter: The number of teeth of the tooth cutter is many, with reasonable back angle, so the cutting is light, smooth, the surface quality is good, the cutter life is high. But the needles milling cutter need to rely on the mold or in the CNC tool grinder to grind the back, sharpening process complex. Therefore, the blade-shaped simple milling cutter is generally made into a toothed shape.

      2. Shovel forming cutter: The tooth back is formed by radial shoveling to have the rear edge of the forming edge. The tool along the rake face after grinding to ensure that the blade shape unchanged, so in the production of the general use of shovel structure, only in mass production only use the tines structure. This chapter only discusses the design method of the shovel forming milling cutter.