Investigation of tool wear and surface finish in turning process using various cutting condttion

Bakri, Razali (2012) Investigation of tool wear and surface finish in turning process using various cutting condttion. Masters thesis, Universiti Tun Hussein Onn Malaysia.

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Abstract

6061 aluminum alloy was subjected to various cutting condition using uncoated carbide as a cutting tool. During machining, cutting speed can influence the tool wear and surface roughness. An investigation has been conducted under orthogonal cutting condition in order to study the affect of cutting speed to tool wear and surface roughness; and find which condition contribute more tool wear and surface roughness. It was observed that aluminum had a tendency to melt during cutting process and work material adhere on tool rake face especially at low cubing speed. The result from this situation is the formation of built up edge. By using cutting fluid as a coolant, cutting process can be done at high cutting speed; the temperature can be controlled and minimize the formation of built up edge. However, the use of cutting fluids may harmful to environment and human. Mist coolant can be a alternative to overcome this problem. The experiment revealed that mist coolant also can minimize built up edge. The formation of built up edge and adhesive layer on tool rake face can degrades the surface finish of the work piece. Where more high adhesion wears, the surface roughness will increase too. During the experiment, cutting speed was varied from low to high. At low cutting speed, the adhesion wears higher than high cutting speed. The reason is at cutting speed the chip was continuously flow fiom the rake angle. The result can cause the abrasion on tool rake face. By increasing the cutting speed, the adhesion wear can be decrease and bring good swface fmish.

Item Type:Thesis (Masters)
Subjects:T Technology > T Technology (General)
ID Code:2411
Deposited By:Normajihan Abd. Rahman
Deposited On:23 Apr 2012 08:45
Last Modified:23 Apr 2012 08:45

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