Abstract
Rapid development of technology in manufacturing facilitates the industry to produce mass, high quality and affordable products. The challenge for small industries in manufacturing is to compete for product quality. Small manufacturing industries in controlling the quality of product deal with financial problems. Chip and surface roughness of low speed machining were tested to control the quality of material mechanical properties. The purpose of this study is to investigate the relation between chip characteristic and surface roughness with material hardness. This study used a conventional lathe with low rotation, cutting depth of 1 mm, dry turning process with variations of feed rate of 0.1 mm/rev, 0.2 mm/rev and 0.3 mm/rev, test material of AISI steel (1020, 1045, 1090, D2 and 4340) and tool material from carbides. Stereoscopic Optical Microscopy (SOM) was used to measure temporary shear angle while surface roughness tester was used to measure surface roughness. The results show that the shear angle of the chip and the surface roughness correlated with the hardness of the material.
Highlights
The rapid development of technology in manufacturing facilitates the industry to produce mass, high quality and affordable products
The purpose of this study is to investigate the hardness level of steel viewed from shear angle and surface roughness resulting from the process of machining lathe
The formation of chip generated on the commercial steel from conventional lathe machining processes with low rotation can be characterized as follows: that the increase in feed rates of the chip formation will tend to be shorter or the spiral diameter will be smaller and more broken
Summary
The rapid development of technology in manufacturing facilitates the industry to produce mass, high quality and affordable products. The challenge for small industries is to compete for product quality. Small manufacturing industries in controlling product quality deal with financial problems. Chip and surface roughness of machining with low speed were tested to control the quality of material mechanical properties. The result of the machining process is always related to the final surface and chip. The surface finish is an indicator of quality and precision in the machining process and is considered as an important parameter in the industry [1]. Chips are leftover cutting materials in the machining process and are often regarded as waste
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