The structure of the working part of the tool


There are three types of structure of the working part of the tool: integral type, welding type and mechanical clamping type

■The overall structure is to make a cutting edge on the cutter body;

■The welding structure is to braze the blade to the steel cutter body;

■There are two types of mechanical clamping structures, one is to clamp the blade to the cutter body, and the other is to clamp the brazed cutter head to the cutter body. Cemented carbide is generally made of welded structure or mechanical clamping structure: porcelain tools adopt mechanical clamping structure.

The geometric parameters of the cutting part of the tool have a great influence on the cutting efficiency and the quality of machining. Increasing the rake angle can reduce the plastic deformation when the rake face extrudes the cutting layer, reduce the frictional resistance of the chip flow through the front, thereby reducing the cutting force and cutting heat. However, increasing the front angle will reduce the strength of the cutting edge and reduce the heat dissipation volume of the tool head.

When selecting the angle of the tool, it is necessary to consider the influence of a variety of factors, such as workpiece material, tool material, processing properties (rough, finishing), etc., which must be reasonably selected according to the specific situation. Usually the tool angle refers to the labeling angle used for manufacturing and measurement in the actual work, due to the different installation position of the tool and the change of cutting movement direction, the actual working angle and the angle of the annotation are different, but usually the difference is very small.