Essay On Conventional Machine

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Machine Shop
Conventional vs. Non-conventional Machines
Machining is any of various processes in which a piece of raw material is cut into a desired final shape and size by a controlled material-removal process.
Conventional Machines: - Machines that are driven or operated with the help of human resource is termed as conventional machines. Conventional machines requires direct contact of tool and work piece.
Non-conventional Machines: - Machines which are fully automated in which there is no need of human resource to control the functions of the machines. This method involves the use of modern and advanced technology for machine process. There is no physical contact between the tool and the work piece in such process.
Types of Machining Operations
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All jet engines, which are also called gas turbines, work on the same principle. The engine sucks air in at the front with a fan. A compressor raises the pressure of the air. The compressor is made with many blades attached to a shaft. The blades spin at high speed and compress or squeeze the air. The compressed air is then sprayed with fuel and an electric spark lights the mixture. The burning gases expand and blast out through the nozzle, at the back of the engine. As the jets of gas shoot backward, the engine and the aircraft are thrust forward. As the hot air is going to the nozzle, it passes through another group of blades called the turbine. The turbine is attached to the same shaft as the compressor. Spinning the turbine causes the compressor to spin.
The image below shows how the air flows through the engine. The air goes through the core of the engine as well as around the core. This causes some of the air to be very hot and some to be cooler. The cooler air then mixes with the hot air at the engine exit area. This picture shows how air flows in an

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