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Feasibility Study of Tool with V Shape Micro Textures
Date Issued
2014
Date
2014
Author(s)
Chang, Yen-Wei
Abstract
This thesis illustrated the feasibility of machinability improved by a tool with v shape micro textures in comparing with a tool with stripe textures. The concept of adopting the v shape textures on cutting tool came from hydrodynamic lubrication. The purpose is to increase lubricity in cutting. The design of v shape textures started from lubrication theory, then a sliding plates test was conducted to determine the appropriate groove angle, and the cutting experiment was conducted later to evaluate the machinability improved by the tool with v shape textures. The results showed that after cutting for 300 m the friction force and coefficient of friction is 11 % and 7 % less than conventional tool, and 4 % and 3 % less than those of a tool with stripe textures. The maximum height of chip adhesion reduced 26 %.The length of notch wear on secondary flank reduced 20 %. The surface roughness (Ra) is lower than a tool with stripe textures. Finally the chip appearance produced by a tool with v shape textures is bright and curly, which showed the friction force and the cutting temperature were lower than that of a tool with stripe textures. Consequently, the machinability improved by a tool with v shape micro textures is better than that of conventional cutting tools. If more improvements were adopted in future research, such as the optimum design of groove dimensions and high viscosity lubricant, the machinability will be further improved.
Subjects
v shape textures
turning tool
hydrodynamic lubrication
Type
thesis
File(s)
No Thumbnail Available
Name
ntu-103-R01522709-1.pdf
Size
23.54 KB
Format
Adobe PDF
Checksum
(MD5):4902c0b2982071a2d2db61fe48081330