A raw work part enters at one end of the line, proceeds through each<br>workstation and appears at the other end as a completed product. In the normal<br>operation of the line, there is a work part being processed at each station, so that<br>many parts are being processed simultaneously and a finished part is produced<br>with each cycle of the line. The various operations, part transfers, and other<br>activities taking place on an automated transfer line must all be sequenced and<br>coordinated properly for the line to operate efficiently.<br>Modern automated lines are controlled by programmable logic controllers,<br>which are special computers that can perform timing and sequencing functions<br>required to operate such equipment. Automated production lines are utilized in<br>many industries, mostly automobile, where they are used for processes such as<br>machining and pressworking.<br>Machining is a manufacturing process in which metal is removed by a<br>cutting or shaping tool, so that the remaining work part is the desired shape.<br>Machinery and motor components are usually made by this process. In many<br>cases, multiple operations are required to completely shape the part. If the part is<br>mass-produced, an automated transfer line is often the most economical method<br>of production. Many separate operations are divided among the workstations.<br>Pressworking operations involve the cutting and forming of parts from<br>sheet metal. Examples of such parts include automobile body panels, outer<br>shells of laundry machines and metal furniture More than one processing step is<br><br>11<br><br>often required to complete a complicated part. Several presses are connected<br>together in sequence by handling mechanisms that transfer the partially.<br>completed parts from one press to the next, thus creating an automated<br>pressworking line.
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