Abstract
Tolerances and the buildup of tolerances affect the buildability, cost and quality of a product. The effect of the tolerances is so important that there are three major groups in manufacturing organization that are concerned with the tolerances which are design. process engineering and quality control. This work is a step in the field of computer-aided tolerancing (EXCAT). It consists of a helpful program which has a great important to the production and the design engineers. The program is written with an artificial intelligence programming language which is namely TURBO PROLOG, so the program is structured as mini expert system. For this reason the system contains a knowledge base for fit selections according to the function of the assembly, and limit gauges design. One of the benefits of using of the software is saving in the design and production time and so saving in their costs for the long run. This system is suitable for using in small workshop and also may belinked with CAD/CAM system.
Highlights
An important term linked with mechanical drawing is the tolerance
Tolerances are aHocated to the dimension to take care of this limitations
Several methods are approved by ANSI Y 105, 1973 for expression tolerances in dimensions
Summary
An important term linked with mechanical drawing is the tolerance. A dose integration of design aspects with manufacture is needed for the success of any product. A comprehensive SUTVey of the basic techniques available for tolerance allocation are presented in l3].The integration of such techrUques with CAD allows for new generation of CAD/CAM systems, At the present time very little literature is available showing the implementation of tolerance allocation procedure in CAD systems[4] Another impon.ant issue in assembly tolerance allocation involves computer-aided selection of fits, The research in tolerance allocation and selection of fits are closely related and cannot be separated. The tolerance IS decided based on the end-use of the feature and its basic dimensions After this deSigner incorporates the relevant detail into the drawing. The paper identfies a procedure for future automation the process of tolerance assignment in computer aided drafting as well as the limit gauges design
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