Reason-A Technical Journal (Formerly Reason-A Technical Magazine)

Bijoy Mandal ¹, Debashis Biswas ¹, Anirban Sarkar ¹, Santanu Das ¹, Simul Banerjee ²

Affiliations
1 Department of Mechanical Engineering, Kalyani Government Engineering College, Kalyani-741235, IN
2 Department of Mechanical Engineering, Jadavpur University, Kolkata-700032, IN

Abstract

Grinding fluid application is important to control thermal related problems while grinding titanium alloys. Conventional fluid delivery systems are not able to deliver grinding fluid deep into the grinding zone because of the presence of a stiff air layer around a rotating grinding wheel. A newly developed pneumatic barrier system is used in this experimental investigation to penetrate the air layer so as to deliver fluid into grinding zone. Dry, flood cooling and flood cooling with pneumatic barrier conditions are used to explore the influence of these environmental conditions on grindability of titanium grade 1 workpiece. It is seen that under flood cooling using pneumatic barrier, better grinding performance is obtained than conventional flood cooling condition.

Keywords

Grinding, Pneumatic Barrier, Grinding Fluid, Titanium Alloy, Air Layer.

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Debashis Biswas ¹, Anirban Sarkar ¹, Bijoy Mandal ¹, Santanu Das ¹

Affiliations
1 Department of Mechanical Engineering, Kalyani Government Engineering College, Kalyani-741235, IN

Abstract

Titanium and its alloys are being increasingly used in aerospace engineering, corrosive fluid pumps, heat exchangers, sea vehicles, etc. However, it is quite difficult to grind for its high chemical reactivity, high strength, high hardenability and low thermal conductivity causing high grinding temperature, wheel loading, wheel material removal, grit wear, etc. Therefore, selection of wheel, wheel speed and fluid for grinding of titanium is important to achieve desirable surface quality. Formation of a stiff air layer is a major constrain restricting the fluid enter the grinding zone. Optimization of a method of grinding fluid application is essential to control thermal problems from interaction of the wheel grains with the work surface. Adopting an appropriate fluid delivery system may enhance grindability of titanium alloy and can reduce environmental pollution. In the present experimental work, surface roughness, grinding forces and grinding chips are observed under the condition of dry, and wet using a compound nozzle. Surface grinding of titanium Grade 1 alloy is done with the use of silicon carbide wheel. It is found out that grinding under wet with compound nozzle fluid delivery system exhibits fairly good grindability.

Keywords

Surface Grinding, Compound Nozzle, Titanium Alloy, Silicon Carbide Wheel.

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Sirsendu Mahata ¹, Jayanta Mistri ¹, Bijoy Mandal ¹, Santanu Das ¹

Affiliations
1 Dept. of Mechanical Engineering, Kalyani Government Engineering College, Kalyani-741 235, IN

Abstract

Coolants play a decisive role in grinding because of the intense heat generation and the consequent thermal damage associated with the process. Different types of coolants with varying and diverse compositions are used for grinding different types of work material in order to reduce the heat generated due to friction and to carry away the heat produced as well as for efficient swarf disposal. The present paper aims at discussing about the different types and composition of coolants used in grinding. The mechanism of action of coolants, their application on different workpiece materials and their functions are also discussed in the paper.

Keywords

Coolant, Lubrication, Grinding.

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Bijoy Mandal ¹, Debashis Biswas ², Anirban Sarkar ², Santanu Das ²

Affiliations
1 Department of Mechanical Engineering, Kalyani Government Engineering College, Kalyani, IN
2 Department of Mechanical Engineering, Kalyani Government Engineering College, Kalyani - 741 235, IN

Abstract

Study of chips favours judging the performance of machining and grinding Different kinds of chip formation are related to specific energy consumptions, heat produce, etc. The nature of the chip forming process is extremely vanable and depends upon the metallurgical aspect of the tool-work pair, un-deformed chip thickness, rake angle, cutting temperature, sharpness of the tool, etc Observation of chip formation during grinding of a specific matenal may facilitate determine the appropriate wheel speed, table feed and infeed for efficient grinding in this experimental study, grinding chips under different infeeds and environmental conditions have been investigated for low carbon steel specimens Good grinding performance has been achieved when water-soluble oil is used as a grinding fluid with pneumatic barrier set up.

Keywords

Grinding Chips, Surface Grinding, Surface Quality, Pneumatic Barner.

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Bijoy Mandal ¹, Santanu Das ²

Affiliations
1 Kalyani Government Engineering College, Kalyani-741235, IN
2 Dept. of Mechanical Engineering, Kalyani Government Engineering College, Kalyani-741235, IN

Abstract

Metal cutting is a machining process in which a finished surface of desired size, shape, accuracy or finish is obtained by separating the excess layers of material in the form of chips with the aid of a wedge-shaped device called cutting tool. For metal cutting, it is important to optimise surface finish, workpiece accuracy, tool-life monitoring and high productivity.

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Bijoy Mandal ¹

Affiliations
1 ProductionEngineering, Kalyani Government Engineering College, IN

Abstract

Composite have unique advantage over monolithic materials. Many of our modern technologies require materials with unusual combinations of properties that cannot be met by the conventional metal alloy. The recent trend o1 the composite materials in aerospace, space research, automobiles industry, atomic energy are very much interesting for researchers. C/C-SiC composites that incorporate hard particles like diamond, cubic BN and B₄C for cutting tools. SiC/SiC composites are being considered for advanced nuclear applications such as fusion blanket/first wall structures.

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