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

By Lawrence J. Kamm

A winning engineer and entrepreneur stocks his secrets and techniques for generating regularly improved designs at immense expense discount rates. minimal constraint layout (MinCD) is a brand new systematic layout technique that yields significant price mark downs and tremendously improves the reliability of synthetic mechanisms. For the 1st time, this useful reference offers the "how-to-do-it" info you must positioned this powerful Read more...

summary: A profitable engineer and entrepreneur stocks his secrets and techniques for generating continually improved designs at tremendous fee mark downs. minimal constraint layout (MinCD) is a brand new systematic layout approach that yields significant rate savings and tremendously 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 robust layout software to paintings immediately -- it doesn't matter what your point of educating or event. established upon the author's wide event in product layout, this well timed booklet truly explains some great benefits of MinCD and tells you ways to create greater, extra inexpensive product designs utilizing on hand advertisement elements. full of unique principles, layout information, priceless examples, and references - together with directories of part owners - this special combination of sensible 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

Sample text

We have seen that it can also introduce damaging moments unless spherical-washer pairs are sandwiched under the foot and preferably under the bolt head as well (Fig. 42). Internal stresses in the part from opposing friction forces among the feet can be minimized, with installation skill, by tightening the bolts cyclically, a little at a time, as one tightens the nuts holding down a cylinder head. 1 Single narrow wheel. A single narrow wheel rolling on a smooth surface provides a point of hard constraint where it touches the surface.

1 Lathe chucks. Three-jaw chucks are really examples of semiMinCD, since we assume that the cylindrical shape of the workpiece fits the parallel gripping edges of the jaws. Four-jaw chucks are RedCD. 2 Robot grippers. Robot grippers may be either MinCD, semiMinCD, or RedCD. A robot gripper is an automatic fixture and benefits from MinCD just as a jig does. Furthermore, the robot gripper must grip the part during transfer from the originating workholder to the receiving workholder. During the transfer the part may be temporarily gripped by both a workholder and the robot gripper: a severe case of overconstraint.

Mechanical hysteresis is the energy loss when a material is subject to a varying stress. The energy loss appears as a smaller force in the return direction than the applied force in the forward direction. This energy loss is used to damp oscillation in shock and vibration absorbers. Most metals have low hysteresis. Most of the materials listed above in Subsec. 3 have high hysteresis, which is why they are used for damping. 3 Viscosity. Viscous force is used in various devices to generate soft constraint either to damp oscillation or to decelerate a body.

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