For comparative cutting tests were thick and pcd diamond composite sheet prepared as of the end mill having the same shape and geometric parameters. Preferred end mill design parameters: diameter ø125mm, knife teeth 6 teeth, cut deep rake angle 3 ° ~ 8 °, the radial rake angle 0 ° ~ -5 °, the main angle 75 °; cemented carbide substrate use yg3x square blade, knife body with indexable before compression, blade thickness, diameter, connection size, etc. according to national standards.

With a laser respectively pcd diamond thick composite sheet and cut into triangular pieces, with special tooling to yg3x carbide blade grinding into line with the triangular patch size flutes, use to prepare for brazing. With high diamond films and the interface between the metal and its alloys can generally difficult to be generally low-melting alloy infiltration and Diamond Thick poor weldability. In order to enhance diamond thick film and cemented carbide substrate between weldability, using a special high-intensity silver-copper alloy solder, and the use of low-temperature brazing alloy welding thick blade and pcd diamond blade. When fine-grained selection of brazed blades are the same level of precision surface grinding, high strength, coarse-grained diamond grinding wheel, fine grinding wheel semi-fine grinding of diamond tool tip arc is used tooling automatic sharpening. End mill by the assembly, debugging, axial and radial runout controlled within 0.002mm range.