1, cutting force and friction influence. When precision parts processing cutting special tools cutting edge arc and its response to the side of the product workpiece extrusion and friction will cause the metal material to produce plastic deformation, which in turn causes the current residual areas distorted or aggravated concave groove, enhance the surface roughness and cause the production and processing of brittle raw materials at this time, cutting chips into crushed particulate matter, and the production and processing of the surface often shows the particles collapse marks, leaving Many dents, so that the surface is not smooth.
2, the impact of processing hardening. When cutting special tools to cut plastic at a certain rate, cutting on some small particles will adhere to the top of the front edge, resulting in a high toughness of the stacking edge, can replace the front edge and cutting edge laser cutting.
When the sliding friction between the cutting and stacking edge exceeds the spray weld compressive strength between the stacking edge and the front edge, or when it is damaged or vibrated, the stacking edge will burst out, and thus the new creation-up edge will be slowly transformed afterwards. The generation of stacked edges, growth and development and fall off will seriously affect the surface roughness of the part.
3, the impact of scale thorns. In the cutting full process, because of precision parts processing when cutting in the cutting surface friction and spray welding, cutting chips will be on time to stay in the front tool surface, and then squeeze the surface of the new production processing. In obvious cases, the surface will tear. Phosphorus-like spurs are produced on the surface, making the surface unsmooth and uneven.
Because of the influence of the above physical elements on the surface roughness, in order to better reduce the surface roughness, in addition to reducing the plastic deformation caused by the cutting force, to prevent the malignant tumor of the accumulation and the creation of debris during the machining of precision parts.