Metal processing tool basic knowledge: the choice of tool angle, the need to consider the impact of a variety of factors, such as workpiece materials, tool materials, processing properties (rough, finishing), etc., must be reasonably selected according to specific circumstances. Generally speaking, the angle of the tool is the angle of the manufacturing and measurement. In the actual work, the angle of the actual work and the angle of the mark are different due to the different position of the tool and the direction of the cutting movement, but usually the difference is very small The

The material of the tool must have high hardness and abrasion resistance, the necessary bending strength, impact toughness and chemical inertness, good process (cutting, forging and heat treatment, etc.) and is not easy to deform.

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