Designing cost-efficient mechanisms : minimum constraint by Lawrence J. Kamm

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By Lawrence J. Kamm

A profitable engineer and entrepreneur stocks his secrets and techniques for generating always more advantageous designs at giant price discount rates. minimal constraint layout (MinCD) is a brand new systematic layout procedure that yields significant expense rate reductions and vastly improves the reliability of synthetic mechanisms. For the 1st time, this useful reference presents the "how-to-do-it" info you must placed this powerful Read more...

summary: A profitable engineer and entrepreneur stocks his secrets and techniques for generating regularly more advantageous designs at colossal rate reductions. minimal constraint layout (MinCD) is a brand new systematic layout method that yields significant price rate reductions and significantly improves the reliability of synthetic mechanisms. For the 1st time, this useful reference presents the "how-to-do-it" details you want to placed this robust layout software to paintings straight away -- it doesn't matter what your point of teaching or adventure. established upon the author's large event in product layout, this well timed publication sincerely explains the benefits of MinCD and tells you the way to create higher, extra comparatively cheap product designs utilizing on hand advertisement elements. filled with unique rules, layout guidance, priceless examples, and references - together with directories of part proprietors - this distinct mix of sensible and theoretical wisdom will revolutionize how you paintings

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Sample text

A theoretically pure MinCD tripod is shown in Fig. 6. One of the feet has a caster 1 and another has a wheel 2 oriented to roll toward the third foot 3. This tripod is pure sixconstraint MinCD. 6 is intended as an exercise to demonstrate MinCD principles. 2 One-leg stool. The one-leg stool is an amusing form of tripod in which the sitter's legs are the other two legs. 6 Pure MinCD tripod. 7 One-leg stool (shooting stick). milking stools with one leg and a lap strap so that the milker can move the stool around without using hands.

This example also introduces the concept of "sequential caging"; the time sequence in which constraints are applied can be useful and important. This example shows that the concept of minimum constraint, while requiring only six constraint points for a rigid body, can incorporate additional constraint points to restore a flexible body to its desired shape. It can be useful to make part of an otherwise rigid body flexible to permit it to self-align with a desirable redundant constraint. 1 Thin. Thin bodies may be flexible in one direction of bending and in twist and rigid in other directions.

A pair of rollers 5 engages rail 6 for roll constraint. These middle sizes were made up to 20 ft long and were used both vertically and horizontally. Again, the cost was low; very little machining was required, none of it over large areas. For better straightness than provided by the raw extrusion, we shimmed the stand-offs 3 by using the simple instrumentation of Fig. 23. A variety of drives, mountings, and load attachments were used, all independent of this basic five-constraint, one-freedom MinCD mechanism.

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