8.ppt - Group Technology GROUP TECHNOLOGY IS A...

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Group Technology GROUP TECHNOLOGY IS A MANUFACTURING TECHNIQUE AND PHILOSOPHY TO INCREASE PRODUCTION EFFICIENCY BY EXPLOITING THE “UNDERLYING SAMENESS” OF COMPONENT SHAPE, DIMENSIONS, PROCESS ROUTE, ETC.
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TECHNIQUE: 1. DETERMINE PART AND MACHINE REQUIREMENTS 2. NUMERICALLY CODE EACH PART GEOMETRY (& SIZE) MATERIAL OTHER SPECIFICATIONS (TOLERANCE, SURFACE FINISH) 3 . FORM A FAMILY OF SIMILAR PARTS WHICH USE (LARGELY) THE SAME SET OF MACHINE TOOLS 4. LAY OUT OF EACH CELL (A GROUP OF MACHINE TOOLS) TO MAKE A FAMILY OF PARTS 5. DESIGN GROUP TOOLING
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EXAMPLE: THIRTEEN PARTS WITH SIMILAR MANUFACTURING PROCESS REQUIREMENTS BUT DIFFERENT DESIGN ATTRIBUTES
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FUNCTIONAL LAYOUTS ARE INEFFICIENT PROCESS-TYPE LAYOUT Lathe Milling Drilling Grinding Assembly Receiving and Shipping L L L L L L L L M M M M M M A A A A D D D D G G G G G G L- Lathe; M- Milling; G-Grinding; D-Drilling ; A-Assembly
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GROUP TECHNOLOGY Flow line LAYOUT Shipping L L M D L M D G L M G G A A Receiving The idea is to form groups and to aim at a product-type layout within each group (for a family of parts). A mean to standardize products and process plans.
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Department #2 Department #3 Department #1 D D M I D M L L I D M L M I CELLULAR LAYOUT Typically, a cell is a small group of machines (as a rule of thumb not more than five). An example would be a machining center with inspection and monitoring devices, tool and Part Storage, a robot for part handling, and the associated control hardware.
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Flexible Manufacturing Systems (FMS)
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Material Handling and Storage System Functions of the Handling System
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