Download Integrated Product Design and Manufacturing Using Geometric by Bob Campbell PDF

By Bob Campbell

This ebook addresses the guidance and alertness of layout structure analyses with concurrent engineering groups in six steps that catch layout reason and upload worth to layout approach. It deals instruments for casting off high priced trial-and-error techniques and carry economically manageable items. The authors talk about product layout recommendations that alleviate the restrictions among product definition, production, and inspection, the prediction of version results on product functionality and production potency, practical inspection thoughts that come with CMM size, optical comparators, and floor plate and sensible gaging, and extra.

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Read Online or Download Integrated Product Design and Manufacturing Using Geometric Dimensioning and Tolerancing (Manufacturing Engineering and Materials Processing) (v. 60) PDF

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Additional resources for Integrated Product Design and Manufacturing Using Geometric Dimensioning and Tolerancing (Manufacturing Engineering and Materials Processing) (v. 60)

Sample text

Randomness is still present in the workpiece/gage system during the inspection process, but this effect is primarily due to the random distribution of errors associated with part manufacture, not due to random effects present in the physical gage. As a consequence, acceptance probabilities are affected by the state of the gage immediately following fabrication and during its useful life—hence the Copyright 2003 by Marcel Dekker, Inc. All Rights Reserved. 206 Chapter 10 need for formal maintenance and calibration procedures to ensure adequate control of the gage or fixture.

Copyright 2003 by Marcel Dekker, Inc. All Rights Reserved. 232 Chapter 11 FIGURE 11-17 Gaging a tapped hole for location. The spindle is positioned at the basic pin location (datum feature A should be perpendicular to the machine spindle) and the bushing is lowered over the pin. The bushing should touch the top surface of the part. The operation is repeated at each pin location. 3 Tapped Holes Figure 11-17 illustrates a bushing used to check the location and size of a tapped hole. 010 in. , which is the maximum thickness of the mating part.

The results of the analysis provide the information—the DRFs—needed to construct the virtual equivalent of datum feature simulators and incorporate these into what can be described as a virtual functional fixture. This software-based fixture provides the coordinate system necessary to inspect the controlled features. In essence, the programming process for the CMM requires that the measurement process planner or the CMM programmer design a software equivalent of the functional gage. When the programmer creates the DRFs within the software, he or she mimics the design and manufacture of the fixture elements of a functional gage.

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