The roughness of the machined surface is determined by the kinematics of chip removal, the shaping and the geometry of the cutting edge. The change of the surface roughness in cutting done under different conditions is easy to follow examining the theoretical value of roughness characteristics. This paper examines how the extent of the theoretical value of total height of profile depends on the different technological parameters in rotational turning. Furthermore the surface roughness and roughness profile is compared achievable by rotational turning and traditional longitudinal turning (in case of radius and pointed cutting tool).
The effect of the pressure force and tool material structure on the surface roughness and straightness of honed bores is studied in this paper. We measured the vertical straightness, the arithmetic average and the maximum height of the roughness profile in our experiments, which contained 9 setups. We compared the registered profiles from the measuring devices in addition to the values of the three quality parameters.
Research on efficient machining of hardened surfaces is invariably of interest because the number of wear resistant surfaces on the machined parts is increasing. These surfaces can be machined by both single-point (cutting) and abrasive (grinding) tools. However, in designating the finishing of the parts, the working characteristics of the products that the parts are intended for limit the finishing options. In this paper the results of a comparative experiment are introduced. In the experiments the allowances were removed from the hardened surfaces of the parts by turning, grinding or a combination of them. The comparative analyses were carried out for the roughness and accuracy of the machined surfaces and the procedures were assessed.
The accurate knowledge of the defining parameters of chip removal in rotational turning is necessary for the description of the complex kinematic relations. In this paper two characteristic parameters of the chip cross-sectional area undeformed equivalent chip thickness, chip width is defined. Lastly the application of the gained relation is shown for a specific example.
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