集成装置和变速箱壳体夹具规划系统.docVIP

Int J Adv Manuf Technol (2005) 26: 310–318 DOI 10.1007/s00170-003-1997-z ORIGINAL ARTICLE M. Stampfer Integrated set-up and ?xture planning system for gearbox casings Received: 23 March 2003 / Accepted: 27 May 2003 / Published online: 1 December 2004 ? Springer-Verlag London Limited 2004 Abstract Brie?y reviewed in this paper is the development of an expert system for the ?xture set-up and for gearbox casings to be machined on machining centres. The set-up and ?xture plan- ning involves the de?nitions of operation sequence, workpiece orientation, locating type, locating surfaces, clamping type, and clamping surfaces. In this paper, the development of the system and a more detailed description of the locating solution is pre- sented. Keywords Expert systems · Fixture planning · Locating · Process planning 1 Introduction The conceptual design of ?xtures is one of the most complex in- tellectual tasks in the process of industrial design [1]. This early stage of design can be automated with the application of expert systems. An expert system for set-up and clamping ?xture planning is developed for machining of gearbox casings, which belong to the class of prismatic workpieces. For machining prismatic workpieces, the most suitable ma- chine tool is the horizontal machining centre [6]. Depending on the workpiece complexity, the complete machining is feasible in one or two clamping operations. In the process of ?xture design, the technological process is reduced to operations, and general solutions for clamping ?xtures are generated for every clamping. The basic operation functions of clamping ?xture are the locat- ing and clamping of the workpiece [8]. Locating can be divided into plane locating and side locating, and side locating is further reduced to endwise locating and guiding (Fig. 1). M. Stampfer Department of Mechanical Engineering, P′ecs University, 7624 P′ecs, R′okus u.2., Hungary E-mail: smihaly@witch.pmmf.hu Tel.: +36-72-503650/3777 Fax: +36-72-503650/3731