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What is machinery?A device that applies force, changes the direction of aforce, or changes the strength of a force, in order to perform a task,generally involving work done on a load. They are often designed to yielda high mechanical advantage to reduce the effort needed to dothat work.Overview: Machineriesare the tools can be powered from a variety of sources. Human and animal powersare options, as is energy captured through the use of waterwheels. However,modern machine tools began to develop only after the development ofthe steam engine, which led to the Industrial Revolution. Today, mostmachine tools are powered by electricity. Machine tools canbe operated manually, or under automatic control. Early machinesused flywheels to stabilize their motion and had complex systems ofgears and levers to control the machine and the piece being worked on. Soonafter World War II, the numerical control (NC) machine was developed. NCmachines used a series of numbers punched on papertape or punched cards to control their motion. In the 1960s,computers were added to give even more flexibility to the process. Suchmachines became known as computerized numerical control (CNC) machines. NC andCNC machines could precisely repeat sequences over and over, and could producemuch more complex pieces than even the most skilled tool operators.Before long, the machines could automatically change thespecific cutting and shaping tools that were being used. For example, a drillmachine might contain a magazine with a variety of drill bits forproducing holes of various sizes. Previously, either machine operators wouldusually have to manually change the bit or move the work piece to anotherstation to perform these different operations. The next logical step was tocombine several different machine tools together, all under computer control.These are known as machining centers, and have dramatically changed theway parts are made.From the simplest to the most complex, most machine toolsare capable of at least partial self-replication, and produce machineparts as their primary function.Need of Machineries: Machineriesare the devices that aid man in the performance of work. Machines use energy tomultiply a force, change the direction of a force, transform or transferenergy, or multiply speed. For example, a car jack is a machine that multipliesforce exerted on its handle so that a relatively small force can lift a car offthe ground. For instance, a force of about 50 N exerted on the jack handleproduces a force of about 2 000 N on the car. Notice that the jack handle movesthrough a greater distance than the automobile. Machineries may also used to changethe direction of a force. A single pulley at the top of a flagpole enables oneend of the rope to exert an upward force on the flag as a downward force isexerted on the other end. Another use of a machine is to transform energy. Agenerator transforms mechanical energy into electrical energy. A steam turbinetransforms heat energy into mechanical energy. We use machines to transferenergy from one place to another. The connecting rods, crankshafts, and axlestransfer energy from the cylinders in the combustions engine of a car to thetires. We also use machines to multiply speed. A bicycle is also a machine thatgains speed by exerting a greater force on it. No machine can be used to gainboth force and speed at the same time.
Know,everything,about,Machiner