Gökhan UÇAN-030070028-5th week

Special Tooling: 10.03.2011 19.10
Special tooling is designed to reduce requirements for direct labor hours and costs, speed production and improve techniques, tolerances, and finished parts. The term includes jigs, dies, fixtures, molds, patterns, special gauges and special test equipment used in the production of end items. The term does not include general purpose tools, capital equipment, expendable tools, small hand tools, tools acquired before the contract, replacement tools, and items of tooling that are usable for the production of items not required under the contract.
(D. Oyer, Pricing and Cost Accounting, Second Edition, pg.145)

CAD/CAM-Assisted Part Programming: 10.03.2011 19.58
The use of CAD/CAM takes computer-assisted part programming a step further by using a computer graphics system (CAD/CAM system) to interact with the programmer as the part program is being pre­pared. In the conventional use of APT, a complete program is written and then entered into the computer for processing. Many programming errors are not detected until com­puter processing. When a CAD/CAM system is used, the programmer receives immediate visual verification when each statement is entered, to determine whether the statement is correct. When part geometry is entered by the programmer, the element is graphically displayed on the monitor. When the tool path is constructed, the programmer can see exactly how the motion commands will move the tool relative to the part. Errors can be corrected immediately rather than after the entire program has been written.
(Mikell P. Groover,Fundamentals of Modern Manufacturing,4th Edition,pg.906)

Limited sequence control: 10.03.2011 20.11
This control system is intended for simple motion cycles, such as "pick-and-place" applications. It does not require a microprocessor and can usually be implemented using limit switches and mechanical stops, together with a sequencer to coordinate and time the actuation of the joints. Robots that use limited sequence control are often pneumatically actuated.
(Mikell P. Groover,Fundamentals of Modern Manufacturing,3rd Edition,pg.903)

Closed Mold: 10.03.2011 20.46
To accomplish a casting operation, the metal is first heated to a temperature high enough to completely transform it into a liquid state. It is then poured, or otherwise directed, into the cavity of the mold.In a closed mold, a passageway, called the gating system, is provided to permit the molten metal to flow from outside the mold into the cavity. The closed mold is by far the more important category in production casting operations.
(Mikell P. Groover,Fundamentals of Modern Manufacturing,3rd Edition,pg.197)