By Lawrence J. Kamm
A winning engineer and entrepreneur stocks his secrets and techniques for generating continuously stronger designs at monstrous expense reductions. minimal constraint layout (MinCD) is a brand new systematic layout method that yields significant fee discount rates and enormously improves the reliability of synthetic mechanisms. For the 1st time, this sensible reference presents the "how-to-do-it" details you want to positioned this powerful layout instrument to paintings straight away -- it doesn't matter what your point of teaching or event. dependent upon the author's wide adventure in product layout, this well timed booklet basically explains the benefits of MinCD and tells you the way to create greater, extra affordable product designs utilizing available advertisement elements. choked with unique principles, layout counsel, priceless examples, and references - together with directories of part proprietors - this exact mix of useful and theoretical wisdom will revolutionize how you work. Read more...
summary: A profitable engineer and entrepreneur stocks his secrets and techniques for generating always improved designs at significant price mark downs. minimal constraint layout (MinCD) is a brand new systematic layout procedure that yields significant expense discount rates and enormously improves the reliability of synthetic mechanisms. For the 1st time, this functional reference offers the "how-to-do-it" details you must positioned this robust layout device to paintings straight away -- it doesn't matter what your point of teaching or adventure. established upon the author's huge adventure in product layout, this well timed ebook sincerely explains the benefits of MinCD and tells you the way to create higher, extra low cost product designs utilizing available advertisement elements. jam-packed with unique principles, layout counsel, necessary examples, and references - together with directories of part owners - this specified mix of useful and theoretical wisdom will revolutionize how you paintings
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Extra info for Designing cost-efficient mechanisms : minimum constraint design, designing with commercial components, and topics in design engineering
See Chap. ) A note about accuracy: mechanisms are made with accuracies and precisions from a microinch to a foot. The principles in this book apply to the entire spectrum; in fact, most instruments in the extremely close precision range tend to be made MinCD. Do not be misled by the accuracies named above, which are coarse by machine tool standards, suggesting that the principles of MinCD apply only to mechanisms of low accuracy. 7 Safety caging. Safety caging is a set of constraints which influence the position of a part or assembly only if there is a failure of the working constraints or controls.
The "part" is actually a rolling cart 30 ft long carrying an aircraft inspection fixture. A sufficiently rigid cart does not fit in the allowed space, so we allow cart 1 to be flexible and support it by many redundant casters 9; it flexes slightly as it rolls over the floor. When it is in approximately the desired position in inspection machine 8, air cylinders extend pointed pins 3, 4 through closefitting hole 3 and close-fitting slot 4 . The pins establish two linear and one rotary constraints, preventing horizontal motion.
5 Large linear-motion mechanism. The largest linear-motion module we made was 140 ft long, in three sections, and carried an 800lb payload. It is shown in Fig. 14. It was MinCD, pure. The spar is a ½-in steel plate 1 welded to the flanges of a 24-in-deep I beam 2. The enclosed box section provides torsional stiffness. (In Sec. 14 Large robot module. freedom, with gravity as the seating force. The spar is carried on short cantilever I beams from four building columns, and a pure MinCD bracket attached the spar to the cantilevers with adjustability to line up the sections.