When selecting the angle of the tool, it is necessary to consider the influence of various factors, such as workpiece material, tool material, and processing properties (roughness, fine processing), etc., and must be reasonably selected according to specific conditions. Generally speaking, the tool angle refers to the manufacturing and measurement of the labeling angle. In the actual work, due to the different installation positions of the tool and the direction of the cutting movement, the actual working angle and the marked angle are different, but the difference is usually very small. .

The materials used to make the tool must have high hardness and wear resistance at high temperatures, necessary bending strength, impact toughness and chemical inertness, good processability (cutting, forging, heat treatment, etc.), and are not easily deformed.

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