The main difficulties are as follows: 1. Large cutting force, high cutting temperature of mechanical parts; high strength of this type of material, large tangential stress and plastic deformation during cutting, so the cutting force is large. In addition, the extremely poor thermal conductivity of the material causes the cutting temperature to rise, and the high temperature is often concentrated in the narrow area near the cutting edge, thus speeding up the tool wear.
- Severe work hardening of stainless steel parts — austenitic stainless steel and some high temperature alloy stainless steel are austenitic structure, and the tendency of work hardening is large when cutting, which is usually several times of that of ordinary carbon steel. Cutting tools in the work hardening area shorten the tool life.
- Stainless steel parts are easy to stick to the tool when machining — both austenitic stainless steel and martensitic stainless steel have the characteristics of strong chip and high cutting temperature. When the strong and tough chips flow through the rake face in the machining of Dongguan Mechanical parts, there will be adhesion, fusion welding and other adhesion phenomena, which will affect the surface roughness of the machined parts.
- The tool wear of stainless steel parts is accelerated – the above materials generally contain high melting point elements, high plasticity and high cutting temperature. CNC machine tool processing accelerates the tool wear, and tool grinding and changing are frequent, which affects the production efficiency and improves the tool cost.
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