Abstract
This paper presents a new approach to improve the machining productivity when grinding the SKD11 steel by using CBN grinding wheel. This approach based on the satisfaction of the surface roughness requirement. The grinding experiments were carried out according to Box-Behnken plan by using the CBN grinding wheel, HY-180x13x31.75-100#. The experimental data was used to build a regression function of the surface roughness depending of the cutting parameters in grinding process including the workpiece velocity, radial feed rate, and depth of cut. The effect degree of each cutting parameter on the surface roughness was also determined. And then, a new solution was proposed to improve the grinding productivity by increasing the workpiece velocity with the satisfaction of the surface roughness requirement. The proposed solution was verified by experimental research. The analyzed results showed that the workpiece velocity can be increased about 1.7 times to increase the machining productivity while the surface roughness only changed about 0.14μm.
Highlights
In machining processing, the grinding is often a selected method to machine the surfaces with high accuracy and surface gloss
Ganesan et al [1], Rudrapati et al [2] determined the optimal values of the cutting speed, feed rate, and depth of cut when grinding the 304 stainless steel
The optimal values of the cutting speed, feed rate, and the depth of cut were determined to machine the parts with a small value of surface roughness when grinding the C40E steel [3]
Summary
The grinding is often a selected method to machine the surfaces with high accuracy and surface gloss. In the studies on the grinding methods, in addition to find the methods on the improvement of surface quality, especially on reducing the surface roughness, the scientists often focus on the methods to improve the productivity in the grinding processes. Many studies that were performed to reduce surface roughness and improve the productivity of grinding process have been published. Ganesan et al [1], Rudrapati et al [2] determined the optimal values of the cutting speed, feed rate, and depth of cut when grinding the 304 stainless steel. The optimal values of the cutting speed, feed rate, and the depth of cut were determined to machine the parts with a small value of surface roughness when grinding the C40E steel [3]. The optimal values of the cutting speed, depth of cut, and number of pass that were determined when grinding OHNS mold steel [4]
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