1. The influence of cutting force and friction. When the precision parts are processed and cut, the cutting edge arc of the special tool and the extrusion and friction of the side of the product workpiece will cause plastic deformation of the metal material, which will cause the current residual area to distort or aggravate the concave groove and improve the surface roughness. At this time, the chips become pulverized particles, and the surface after production and processing often shows the impression of the collapse of the particles, leaving many dents, making the surface not smooth.
2. The influence of work hardening. When the special cutting tool cuts the plastic at a certain rate, some small particles on the cutting will adhere to the top of the front edge, resulting in a high-toughness stacking edge, which can replace the front edge and cutting edge laser cutting.
When the sliding friction between the cutting edge and the stacking edge exceeds the compressive strength of the spray welding between the stacking edge and the front edge, or when it is damaged or vibrated, the stacking edge will pop out, and the newly created-up edge will be in the Then slowly transformed into. The creation, growth and falling off of build-up edges can seriously affect the surface roughness of the part.
3. The influence of scales. During the whole cutting process, due to the friction force and spray welding on the cutting surface during the machining of precision parts, the chips will stay on the surface of the rake in time, and then squeeze the newly produced surface. In obvious cases, the surface will tear. Phosphorus-like spines are produced on the surface, making the surface uneven and uneven.
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