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A. B. Chattopadhyay ¹, R. N. Mohanty ²

Affiliations
1 Dept. of Electrical Engg., R.l.T., Jamshedpur - 831014, IN
2 Dept. of Electrical Engg., IIT, Kharagpur, IN

Abstract

The importance of industry - institution interaction is, day by day, being recognised to a great extent by both the academicians and the people associated with the manufacturing of techno commercial products.

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A. B. Chattopadhyay ¹, A. K. Ghosh ¹

Affiliations
1 Electrrical Engg. Dept., RIT, Jamshedpur, IN

Abstract

It has been learnt that the traditional steps for conducting laboratory classes in engineering curriculum, e.g. supplying instruction sheets for each experiment to the students, checking the working procedures followed by the students etc.

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D. K. Saha ¹, O. N. Mohanty ², S. K. Saha ³, A. B. Chattopadhyay ³

Affiliations
1 TELCO, Jamshadpur, IN
2 National Metallurgical Laboratory, Jamshedpur, IN
3 I. I. T, Kharagpur, IN

Abstract

The high temperature developed during high speed machining and grinding not only limits the tool-life but also deteriorates the quality of the finished product by inducing tensile residual stresses, micro-cracks and structural changes. This problem becomes more critical with the difficult-to-machine materials and when the finished products are used in dynamic loading. In such cases drastic and extreme cooling may be an answer to this problem. In present study liquid nitrogen in the form of a jet is employed on the surface grinding of a number of steels and appreciable improvement is noted mainly through reducing energy consumptions, surface damages and tensile residual stresses.

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S. K. Ghosh ¹, N. P. Mukherjee ², A. B. Chattopadhyay ³, Santanu Das ⁴

Affiliations
1 Dept of Mechanical Engg, IIT, Kharagpur, IN
2 Bengal College of Engg and Technology for Women, Durgapur, IN
3 Dept of Mechanical Engg, Birbhum Institute of Engg and Technology, Suri, IN
4 Dept of Mechanical Engg, Kalyani Government Engg College, Kalyani, IN

Abstract

Recently, austempered ductile iron (ADI) is finding many applications in different areas due to its high strength-to-weight ratio. However, it is a difficult-to- machine material. In this work, experimental investigations have been done to observe machining performance during turning ADI rods using two tool inserts. Cutting force components, chip forms, etc. have been observed during straight turning of ADI rods with TiAlN-coated carbide and cBN tool inserts. Observations have been made by varying cutting velocities under dry condition. Machining tests indicate that coated carbide inserts require less cutting forces and it can machine even after 1 minute of machining, while the cBN inserts show deterioration of the cutting edge just at the end of 20 seconds of machining under a typical machining condition. It is seen that at certain experimental conditions, coated carbide inserts and cBN inserts show fairly good machinability for machining ADI in dry condition.

Keywords

Turning, Machinability, Austempered Ductile Iron, ADI, Ceramic Inserts, Coated Tools.

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