Advanced Fixture Design for FMS (Advanced Manufacturing) by A.Y.C. Nee, K. Whybrew, A. Senthil kumar

By A.Y.C. Nee, K. Whybrew, A. Senthil kumar

Furnishings are the most important to new production ideas and principally dictate the extent of suppleness a producing process can in achieving. Advanced Fixture layout for FMS presents a scientific foundation for the choice and layout of fixturing platforms. It supplies a assessment of the present state-of-the-art of versatile and reconfigurable fixturing platforms. fresh advancements in layout technique utilizing CAD are analysed extensive. Fixture layout is obvious as an inseparable a part of strategy making plans. the first target of a fixture method is to make sure that the half being synthetic might be made regularly in the tolerance laid out in the layout. a brand new approach to tolerance research is used to examine the suitability of position surfaces and the series of operations and is defined intimately.

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Extra info for Advanced Fixture Design for FMS (Advanced Manufacturing)

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1 Fixture Plan The fixture plan establishes the basic fixture concepts. The following outputs are included in the fixture plan: • cost analysis A cost analysis is required to determine the basic fixture configuration that is economically justifiable. This is influenced by: • • • • • • • estimates of manufacturing costs with different levels of automation, labour and machining costs; estimates of fixture costs; manufacturing methods; target batch size and annual production numbers; fixture type and complexity; number of fixtures.

Some adaptations of these 44 Advanced Fixture Design for FMS standard techniques applied to fIXture design are discussed in Chapter 6. • Workpiece control Workpiece control has been discussed in terms of axioms, most of which are heuristically derived. An alternative deterministic approach to design of location systems has been proposed by Chou [10J. Chou's method is based on a technique for analysis of freedom and constraint of objects in 3D space known as Screw Theory [l1J. Chou's method provides an algorithm for synthesis of location and clamping layout design.

It is usually preferable to reduce the number of holding forces by combining those that are in the same direction. 19. It is possible to combine all 38 Advanced Fixture Design for FMS three forces into a single force. To satisfy axiom 16 the line of action of the single force must not produce moments about any possible centre of rotation that tend to move the workpiece away from locators. 20. The component of the line of action of this force projected onto the base plane must also pass through the line joining possible centres of rotation.

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