Design features of the cutting edge of end mills when processing cast iron

When processing cast iron, the design features of the cutting edge of the end mill are mainly reflected in the following aspects:

Sharp groove design: The use of sharp groove blades can effectively reduce cutting force and minimize the occurrence of chipping. This design is particularly important when cutting cast iron because the cast iron material is brittle and prone to chipping chips during the cutting process, which can cause impact and wear on the cutting tool.

Reasonable cutting edge geometric parameters:

Rake Angle: When processing cast iron, the selection of the rake Angle of the end mill should take into account the hardness of the workpiece material and the cutting conditions. Generally speaking, when processing cast iron, the rake Angle should not be too large to ensure the strength of the cutting edge.

Relief Angle: The size of the relief Angle directly affects the wear resistance and cutting performance of the tool. In cast iron processing, the selection of the relief Angle needs to balance the sharpness and strength of the cutting edge.

Principal deflection Angle: The selection of the principal deflection Angle will affect the distribution of cutting force and the cutting effect. When processing cast iron, a main deflection Angle of 45° is commonly used. This helps to direct the cutting force to the material supported by a wider matrix, reducing the formation of notches or burrs in the workpiece.

High strength and wear resistance: Cast iron materials have high hardness and brittleness, and thus require high strength and wear resistance of the cutting edge of the milling cutter. Therefore, the cutting edge design should adopt high-strength and wear-resistant tool materials, such as cemented carbide, etc., and may undergo coating treatment to enhance wear resistance and anti-adhesion.

Anti-chipping design: As cast iron is prone to chipping chips during cutting, which can cause an impact on the cutting edge of the milling cutter, the design of the cutting edge needs to take into account the anti-chipping performance. This may include the adoption of reasonable cutting edge shapes, edge band widths, and the selection of tool materials, etc.