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Affecting the cutting temperature main factors(二)

Author: langfeng Time: 2017-08-09

Affecting the cutting temperature main factors(二)

 

2. The influence of the cutting tool geometry parameter

Cutting temperature θ decreased by the cutting rake angle γo increases.This is because the former Angle increases, the unit cutting force drops,reduce the heat cutting. However,the former angle is greater than 18 ° ~ 20 °,then reduce the influence of cutting temperature, this is because the smaller wedge Angle make the heat dissipation reduced volume. (see figure 2.28)
 
When the main angle Κr reduced hD increase the cutting width, cutting thickness hD reduced, so that cutting deformation and friction increases the cutting temperature. But after cutting width hD increases, cooling conditions improve. Because of heat plays a major role,so as to reduce the main angle kr,cutting temperature drop. Figure 2.29 is the declination Angle kr's  influence on the cutting temperature curve.Negative chamfer bγ1 in the (0-2)f range, corner radius RE vary within 0-1.5mm range,generally does not affect the cutting temperature.Because of the increase of negative chamfer width and corner radius, can make the plastic deformation increase of plastic deformation area,but on the other hand both the tool can make cooling conditions improved somewhat outgoing heat is also increase,both tend to balance,so little effect on cutting temperature. 
 
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