Abstract

In this paper, the empirical research on the effects of cutting parameters on surface roughness when milling 40Cr steel with face mill is conducted. The cutting parameters in this study include the cutting speed, feed rate and depth of cut. The tests are conducted in the form of Central Composite Design. The analysis shows that, for both Ra and Rz: (1) the feed rate has the greatest effect on surface roughness, followed by the degree of influence of the depth of cut, cutting speed with insignificant effects on surface roughness. (2) only the interaction between the feed rate and depth of cut have a significant effect on both Ra and Rz; the interaction between the cutting speed and feed rate, the interaction between the cutting speed and depth of cut have negligible effects on the surface roughness. In addition, the regression equations showing the relationship between Ra, Rz and cutting parameters is developed in this study.

Highlights

  • Milling method has been more popularly used to process mechanical products

  • These relationships are the basis for the selection of the values of the cutting speed, feed rate and depth of cut corresponding to the specific requirements of the value of surface roughness

  • The degree and rules of influence of cutting speed, feed rate and depth of cut on surface roughness (Ra and Rz) when milling 40Cr steel are tested and discussed. These results will orientate the adjustment of the values of the cutting parameters during machining process

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Summary

INTRODUCTION

Milling method has been more popularly used to process mechanical products. In terms of machining productivity, milling is known to be one of the methods which bring highest productivity. In order to process low roughness surfaces, the most common method of mechanical engineering is selection and control of the cutting parameters. In order to do so, firstly, it is necessary to determine the degree and rule of effects of the cutting parameters on surface roughness On this basis, selection and control of the cutting parameters shall be performed. Selection and control of the cutting parameters shall be performed This way has been conducted by many authors during their studies on milling different types of materials. Conducted experiments to survey the effects of cutting parameters on surface roughness when milling Ti-6242S alloy. The empirical research will be conducted to determine the effects of cutting parameters on surface roughness when milling 40Cr steel

Experimental materials
Design of experiments
Surface roughness tester
RESULTS
CONCLUSIONS

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