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Working Principle of Resistance Projection Welding (RPW) In resistance projection welding (RPW), small projections are formed on one or both pieces of the base metal to obtain contact at a point which localize the current flow and concentrate the heat. Under pressure, the heated and softened projections collapse and a weld is formed. Projection on the upper component is pressed against the

Resistance Spot Welding (RSW) Working Principle Resistance Spot welding is comparatively modern welding process. It came in to the field of welding in between years 1900 - 1905. It is a most widely used resistance welding method. The main purpose of resistance spot welding method is to join two to four light gauge overlapping metal sheets (which can have thickness up to 3 mm) . At first

Resistance Seam Welding (RSEW) Working Principles The Resistance Seam Welding (RSEW) is very much similar to the Spot Welding (RSW) but here circular rotating electrodes are used. And here we get continuous weld which is air-tight (If the process is perfect). The seam-welding form of the resistance process is a series of overlapping welds. Two or more sheets of base metal are usually passed

An air compressor is a machine used to compress the air and raise its pressure. The compressed air is used for many purposes such as for operating pneumatic drills, riveters, road drills, paint spaying, in starting and supercharging of internal combustion engines, in gas turbine plants, jet engines and air motors etc. It is also utilised in the operation of lifts , rams, pumps and a variety of

Biomass - Important facts Biomass advantages and disadvantages are associated with some very important facts. Day by day the conventional energy sources like fossil fuels is reducing. Finding sources for conventional energy is a very complicated and lengthy process. But with the increasing population, the need for new energy sources is also rapidly increasing in developing countries and in

Tidal Energy - How Tidal energy works- An introduction All flowing water carry with them kinetic energy. When such water encounters a turbine, part of the momentum of the flowing water is transferred ton to the turbine, causing it to rotate. The rotation of the turbine cam then be used to generate electricity. So for electricity generation purpose we must know about tidal energy advantages and

Wave Energy - A steadier Renewable energy than Wind Waves are increasingly generated in oceans and large lakes; at times the waves are strong enough to overturn large ships or toss them ashore. Gravitational attraction of the sun and the moon as well as the force of wind are mainly responsible for the wave being created. Oceans are efficient collectors of wind energy; indeed waves are a