A veriication of calculated electrical parameters of transmission lines on printed circuit boards is presented. Furthermore, the innuence of common manufacturing processes on the principle cross section of transmission lines and the resulting electrical parameters is subject of the investigations. With regard to existing manufacturing tolerances a sensitivity analysis is carried out taking acco...

The Geometrical Product Specification (GPS) is a set of standards widely adopted by modern manufacturing industries for expressing tolerances and communicating geometrical requirements. It has great benefit in reduction of manufacturing cost, alleviation of design and manufacturing misunderstandings and insurance of the consistency of geometric characteristics for the machining products through...

Geometric dimensioning and Tolerancing (GDT) constitutes the dominant approach for design and manufacture of mechanical parts that control inevitable dimensional and geometrical deviations within appropriate limits. The stack up of tolerances and their redistribution without hampering the functionality is very important for cost optimization. This paper presents a methodology that aims towards ...

The growing use of “augmented” virtual product models, which not only represent the geometric information, but also collect attributes, parameters, rules and procedures, can facilitate the digital simulation of many real processes. The control process of manufactured products can take relevant advantage of such technology. In this context, an approach for the automatic virtual inspection of geo...

The present paper describes the geometries of honing wheels used in final tooth-flank-finishing process automotive transmission gears. For micro honed gears to keep their required gear accuracy, improper a gear-honing wheel cause dressing interval be short. That is because stock removals are not uniform over tooth flank, then wear also uniform. As result, out tolerances. amount removal could de...

The goal of the design and optimization phase in analog integrated circuits conception is to get the structure yielding the best system performance. The parameters of various components (resistance, capacitance, transistors, etc) of the circuit are set to the optimized nominal values, but no guarantee exists that these values will be conserved during the fabrication process. As a matter of fact...

The tolerancing process for precise mechanical systems in a context of short or long run in industrial production requires a rational method from the specification of the functional requirements until the final products are checked. Nowadays the optimization of the tolerances is generally carried out empirically. Compromises must be made between the functional requirements in the design process...

The purpose of functional tolerancing process is to define the geometrical specifications of parts ensuring functional requirements. For automotive and aircraft industries, the tolerance synthesis has become an important issue in product design process. Indeed, designers need methods and rules to determine the tolerances. To define rules, a mathematical formulation of tolerance synthesis is det...