Performance Test of Cryogenically Treated and Coated Tungsten Carbide Cutting Inserts

Abstract

Production cost is dependent on the life of the Tool. Because of enormous heat generation during the material removal process, life of the tool decreases. Tool life will be enhanced by cryogenic treatment which minimises the temperature at tool tip interface. Taguchi technique was employed to get optimum number of experiments for turning white cast iron after the cryogenic treatment and before cryogenic treatment. The correlation between four main factors such as speed, feed, depth of cut, tool condition and responses such as surface roughness, tool tip temperature were analysed. Mathematical model was formulated for tool tip temperature, and surface roughness. The error for the mathematically formulated model was observed to be less than 5%.The present work indicates that cryogenically treated tool have better surface finish . From the anova analysis it is inferred that tool tip temperature and surface roughness substantially reduced while using cryogenically treated tool. It was observed that cutting forces was more influenced by cutting speed of the tool followed by tool condition. Hardness of the tool insert showed improvement because of coatings.

Effect of Aluminium Oxide Filler Composition on Thermoplastic Polymer

“…Alumina of wt% of 5,10, 15,20 are added to PTFE. The compaction of the samples was followed by the sintering method [14][15][16].Powder Compaction is the method by applying high loads to compress a product powder in a die. The devices are typically held vertically with the punch tool surrounding the cavity's edge.…”

“…A proportion of aluminium in the alloys like bronze is used to increase corrosion resistance. Researchers [10][11][12][13][14] during their experimentation noticed the wear resistance improvement in PTFE composite filled with alumina of size 38 nm compared to PTFE polymer. He mentioned the value to be 600 times more compared to pure PTFE.…”