Cutting hard workpiece material and machining traditional soft material very different, so the hard milling tool must design a suitable rake angle, back angle and wedge angle.

Hard machining type used ds sphere, torus and micro milling, can only be designed double-edged structure type. Spherical cutter two main cutting edge must be smooth and without transition. According to the workpiece material and hardness, hard cutting cutter infeed amount up to ap = 0.2mm. At this time, only two four-blade cutter blade during cutting.

Coating

About 3mm thick hard coating prevents direct wear carbide. Facts have proved that, tialn coating at a maximum temperature of 800 ℃ ~ 1000 ℃ when applied to good effect. Compared with uncoated carbide cutting tools, increasing the surface hardness of the hard coat layer can be improved tool, and significantly reduce the friction coefficient. The importance of the three elements of the coating - carbide, geometry and coating and other elements are equally important. Because it is in direct contact with the workpiece material to be cut, which must meet special requirements.

Shank

In order to achieve the best results, such as to make horn ds milling process to obtain satisfactory results, must choose the appropriate handle. Each 1mm radial runout will reduce the durability of the cutter, and will weaken its performance.