Design Rule Checker for Sheet MetalComponents using Medial Axis Transforms andGeometric
Design Rule Checker is an essential component of design automation and for making design, process planning and manufacturing concurrent. In this paper, a set of algorithms are presented for detecting design violations in sheet metal components. Violations in sheet metal components occur when holes, slots, or other features are too close to one another. These violations, if undetected during design, increase the design life cycle of the product. Thus it is very essential to detect, if not eliminate these violations at the early stages of design. Typically sheet metal components have a number of features serving various purposes which include ventilation and fastening. As the contour of the parts gets complicated and the number of features on the sheet metal part increases it is diicult to check the rules exhaustively as it may lead to combinatorial explosion. 1 The algorithm presented here, uses Medial axis transformation to decompose a given domain thus preventing a combinatorial explosion, and also provides a means to integrate the rule checker with a design adviser.
A design advisor for sheet metal fabrication
Using data gathered over many years, people working in sheet metal fabrication have compiled lists of errors that are frequently made by designers in the field. These errors (or violations) are common to the design of sheet metal components used in a wide variety of products from computer chassis to automobiles. This paper outlines the efforts to use this information to aid in the development of a rule-based design advisor for sheet metal fabrication. The design advisor is a module of Promod-S, a concurrently engineered, application-orientated product modeler that is being developed by researchers at the Automation and Robotics Laboratory of the University of Massachusetts at Amherst. The paper presents algorithms for both the identification and correction of design violations. The correction approach includes methods for updating an entire part after a feature has been modified.
EL TRATAMIENTO NEOPRAGMATISTA DE LA VERDAD EN RICHARD RORTY NEOPRAGMATIST TREATMENT OF TRUTH IN RICHARD RORTY
Richard Rorty, one of the most influential authors of our time, presents a critique of the philosophical concept of truth as correspondence. The conclusion of Rorty's neopragmatism is that the idea of truth as correspondence between language and facts is ineffective because it no longer works. The neopragmatist conception of truth indicates the only possible uses for the term «truthful,» revolving around the idea of jus - tification. In this article, the neopragmatist notion of truth is presented in order to