It can be seen from the above functions that increasing or decreasing the anterior Angle has its own advantages and disadvantages. For example, from the generation and heat dissipation of cutting heat, increase the front Angle, can reduce the generation of cutting heat, cutting temperature is not too high; However, if the front Angle is too large, the cutting temperature will increase due to the decrease of the heat conduction area and heat capacity volume of the tool head. When cutting hard materials, a smaller front Angle, or even an appropriate negative front Angle, should be used to strengthen the cutting edge and improve the heat capacity and heat dissipation conditions of the cutting head. But if the front Angle is too small, or take a large negative front Angle, then because the cutting deformation is serious, generate more heat, too late for dissipation, the result will make the cutting temperature rise.