A dimensioning and tolerancing methodology for concurrent engineering applications I: problem representation

Functional dimensioning and tolerancing software for concurrent engineering applications

This paper describes the development of a prototype software package for solving functional dimensioning and tolerancing (FD&T) problems in a Concurrent Engineering environment. It provides a systematic way of converting functional requirements of a product into dimensional specifications by means of the following steps: firstly, the relationships necessary for solving FD&T problems are represe...

Review of dimensioning and tolerancing: representation and processing

The paper surveys the current state of knowledge of techniques for representing, manipulating and analysing dimensioning and tolerancing data in computer-aided design and manufacturing. The use of solid models and variational geometry, and its implications for the successful integration of CAD and CAM, are discussed. The topics explored so far can be grouped into four categories: (a) the repres...

Functional Tolerancing : A Design for Manufacturing Methodology

The problem addressed in this paper is the development of a physico-mathematical basis for mechanical tolerances. The lack of such a basis has fostered a decoupling of design (function) and manufacturing. The groundwork for a tolerancing methodology is laid by a model of profile errors, whose components are justified by physical reasoning and estimated using mathematical tools. The methodology ...

Teaching Geometric Dimensioning and Tolerancing in a Manufacturing Program

Clarifications of Rule 2 in Teaching Geometric Dimensioning and Tolerancing

Geometric dimensioning and tolerancing is a symbolic language used on engineering drawings and computer generated three-dimensional solid models for explicitly describing nominal geometry and its allowable variation. Application cases using the concept of Rule 2 in the Geometric Dimensioning and Tolerancing (GD&T) are presented. The rule affects all fourteen geometric characteristics. Depending...