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The Factors of affecting the surface roughness of cutting and grinding
Jan 24, 2018

1) the nature of the workpiece material

 

When machining brittle materials, the chips are in the form of crumbs, leaving many pits on the machined surface due to chip breaking, making the surface rough. Machining plastic materials, the metal extrusion by the tool has been plastically deformed, combined with the tool forcing the separation of chips and the workpiece tearing effect, so that the surface roughness value increases. The better the toughness of the workpiece material, the greater the plastic deformation of the metal, the rougher the surface is machined.

 

2) Tool geometry

 

Reduce the amount of feed, the main declination, declination and increase the radius of the tip arc can reduce the height of the residual area. Tool relative to the workpiece for feed movement, left in the processing surface of the residual layer cutting area, the shape of the tool geometry reappearance. On the other hand, the appropriate increase of the tool rake angle to reduce the degree of plastic deformation during cutting, a reasonable choice of lubricating fluid and improve the quality of tool sharpening to reduce the plastic deformation during cutting and inhibition of tumor, spines are generated Effective measures to reduce the surface roughness value.

 

3) cutting amount

 

Second, the impact of grinding on the surface roughness of the factors

 

Just as the formation of surface roughness during cutting, the formation of the grinding surface roughness is also determined by the geometric factors and the plastic deformation of the surface metal.

 

The main factors affecting the rough surface grinding are:

 

1) grinding speed and grinding radial feed and light grinding times;

2) Cool the lubricant.

3) the workpiece circumferential feed rate and axial feed;

4) Wheel size, hardness, trimming.



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