Papers by Keyword: Design Rules

Abstract: Decision tables are used in the elaboration of knowledge representation. This article describes the possibilities of using decision tables for production preparation in enterprises of machine industry. The basic structure and decision tables properties in information processing, based on design rules, were characterized. A procedure for the creation of classical decision tables concerning exemplary pre-treatment decision variants was presented. A method of elaboration of modal decision table for the input material assignment to the production was described. An example regarding the construction of knowledge elements basing on the fuzzy sets and levels of capability and statements certainty was shown. Developed decision tables can be used in the construction of an expert system aided design of technological processes

Abstract: Based on modular design rules proposed by IBM, modular design process was planned, which included product overall structure analysis and interface standardized design. Based on module partition, undirected graph was used to represent the relationship between the modules and the product's overall structure. By analyzing the interaction between modules deeply, the structure, dimension and parameter of the interface were standardized in order to determine the standard interface of each module. Brittle materials processing equipment was used to demonstrate the modular design process.

Abstract: Cellular structures exhibit favorable properties for multifunctional applications, such as light weight, high load-bearing combined with high heat exchange capability. This paper is to seek optimal cellular structures as the core architectures of parts manufactured by selective laser melting (SLM) technology, which provides required mechanical properties. Design features for characterizing optimal structural performance are discussed. Some preliminary design rules are developed to improve the manufacturability and the quality of cellular structures, the orientation of strut is designed as ±45° or 90°. Compression tests are also carried out to seek cellular structures of synthetically optimal mechanical properties. Comparing the effects of the unit cell architecture and the relative density on mechanical properties, it reveals that unit cell architecture is dominant rather than the relative density, and the truss lattice with [90°,±45°] structure is the overall best performing among the selected cellular structures.

Abstract: In this paper, we present different points of view to make the sheet metal and micro-wave product as manufacturing friendly as possible. Within DFM(A)-research (Design for Manufacturing and Assembly), engineering design and manufacturability of Micro-Wave (MW) and sheet metal products has been studied. Other aspects of DFM(A) have risen from novel material applications and the development of CAD (Computer Aided Design) environments. In this paper, practical examples are presented to show how to apply DFMA-rules to MW- and sheet metal components, in particular, and how to develop DFM(A)-rules for these purposes.