How to control processing cutting surface roughness?

In the process of cutting processing, for cutting roughness is required, especially in the heavy plate artifacts, if you don't pay attention to in the process of cutting is likely to cause the mistake of cutting is usually required to control cutting machine cutting surface roughness.





so how to control? For more than 2 mm thickness plate cutting, cutting surface roughness distribution is uneven, along the thickness direction of the difference is very big, the change situation, there are two notable features:

1) The cutting surface topography is divided into different parts, the upper surface level off is smooth, neat cutting stripes, fine, roughness value is small; Lower cutting stripe is disorder, uneven surface, the roughness values. Upper has the characteristics of beam direct effect, lower has the characteristic of molten metal erosion.

2) Cutting surface part area of the surface roughness is substantially uniform, do not vary with height; And the surface roughness of the bottom area change with height, the more close to the edge, the surface roughness value, the greater the lower edge of the larger the surface roughness. Whether continuous cutting machine cutting or pulse cutting, cutting surface are shown there is a clear upper and lower two parts, the difference is the cutting stripe and pulse frequency of pulse cutting surface part have corresponding relationship: the higher the frequency, stripe is more close, the more the surface roughness value and continuous cutting when the cutting plane cutting groove density and surface coarse degree, mainly related to the cutting speed.

so when evaluating cutting surface quality should be below the flange surface roughness as a benchmark. But the real edge is just a thread, roughness is difficult to measure, can measure the roughness of near their inferior margin instead of, call it 'close to lower edge roughness'.