By A.Y.C. Nee, K. Whybrew, A. Senthil kumar
Fixtures are the most important to new production concepts and mostly dictate the extent of suppleness a producing method can in attaining. Advanced Fixture layout for FMS presents a scientific foundation for the choice and layout of fixturing platforms. It supplies a evaluate of the present state-of-the-art of versatile and reconfigurable fixturing structures. fresh advancements in layout technique utilizing CAD are analysed intensive. Fixture layout is visible as an inseparable a part of method making plans. the first goal of a fixture process is to make sure that the half being synthetic could be made always in the tolerance laid out in the layout. a brand new approach to tolerance research is used to examine the suitability of place surfaces and the series of operations and is defined in detail.
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Additional resources for Advanced Fixture Design for FMS
Jig and fIxture design manual. 1 Manufacturing Tolerance Stacks A sequence of machining operations involves a series of set-ups for holding and locating the workpiece while it is being machined so that the required design specifications can be economically achieved. To this end the sequence of machining operations and the selection of location surfaces must be based on the practicality of locating and holding the workpiece and on the dimensional relationships between machined features of the part.
2 Example of two and three high toleTallce stacks Tolerance Control and Location Surfaces 53 intennediate resultant dimension. Because they are calculated from working dimensions, balance dimensions also have nominal and tolerance components. It is usual practice to simply add tolerances when calculating balance dimensions, this gives worst case tolerances and is a very conservative approach. An alternative is to use statistical methods to add the tolerances and maintain the three standard deviation tolerance band.
The subscripts are omitted in the design specification. 05. 1O. Dimension BC must be calculated from the chain of working dimensions that contribute to the creation of the two surfaces defined by the dimension. 3. 05 54 Advanced Fixture Design for FMS Op. 3 Op. 1 Op. 2 D1 Op. l5 The dimension BC has a tolerance stack of three and clearly the design specification is not satisfied. It should be noted that final dimensions must be calculated from working dimensions and not other final and balance dimensions.
Advanced Fixture Design for FMS by A.Y.C. Nee, K. Whybrew, A. Senthil kumar