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Rule-based systems approach to fixture design.

机译：基于规则的系统设计夹具。

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摘要

Jigs and fixtures are indispensable tools in the metal removal process. They position the workpiece with respect to the cutting tool and rigidly hold the workpiece throughout the cutting operation. These work holding devices require a considerable amount of time, money and effort to design, fabricate and test. Fixture design has been more of an art than a science and the factors influencing the automated design process have not been studied. With the development of CAD/CAM, modern manufacturing technology is rapidly changing. However, technological development in the area of work holding devices has been minimal. This research is a study of automating the design process of fixtures for machining.; The objective of this dissertation was to develop and test a methodology that can shorten or automate the fixture design process. Shortening the time required for fixture design will enable a manufacturer to react more rapidly to market demands and engineering changes.; One primary research issue is the development of a methodology by which a computer system can recognize a workpiece such that an acceptable fixture will be designed. A second research issue is to determine those factors that influence the automation of the fixture design process. A rule based system was used as a research vehicle to identify and incorporate the many kinds of problem solving techniques needed for fixture design.; The developed system named PBFIXS stands for pattern based fixture design system. The workpiece is represented by the summation of cuboids. Different seating patterns are applied to the workpiece to emulate human recognition of the workpiece. The application of a seating pattern is based on the combinations of the relative positions of four factors; they are: the centers of volume, material removed, shape of the workpiece, and the major thrust force generated by drilling. Other fixture design requirements are also incorporated in the developed system. A number of fixture designs for imaginary and actual workpieces by two experts were compared with the designs by PBFIXS. The results indicate that pattern matching to be a viable approach to fixture design.
机译：夹具和固定装置是金属去除过程中必不可少的工具。它们相对于切削工具定位工件，并在整个切削过程中牢固地固定工件。这些工作保持装置需要大量的时间，金钱和精力来设计，制造和测试。夹具设计已成为一门艺术，而不是一门科学，并且尚未研究影响自动化设计过程的因素。随着CAD / CAM的发展，现代制造技术正在迅速变化。然而，在工件保持装置领域中的技术发展是最小的。这项研究是对用于加工的夹具的设计过程进行自动化的研究。本文的目的是开发和测试一种可以缩短或自动化夹具设计过程的方法。缩短夹具设计所需的时间将使制造商能够对市场需求和工程变更做出更快的反应。一个主要的研究问题是开发一种方法，通过该方法计算机系统可以识别工件，从而设计出可接受的夹具。第二个研究问题是确定影响夹具设计过程自动化的那些因素。基于规则的系统被用作研究工具，以识别和结合夹具设计所需的多种问题解决技术。名为PBFIXS的开发系统代表基于图案的夹具设计系统。用长方体的总和表示工件。将不同的安置模式应用于工件，以模拟人类对工件的识别。座位模式的应用是基于四个因素的相对位置的组合。它们是：体积中心，去除的材料，工件的形状以及钻孔产生的主要推力。其他灯具设计要求也已纳入开发的系统中。两位专家针对假想和实际工件设计的许多夹具设计与PBFIXS进行了比较。结果表明，模式匹配是夹具设计的可行方法。

著录项

  • 作者

    Shin, Hyun-Myung.;

  • 作者单位

    The Ohio State University.;

  • 授予单位 The Ohio State University.;
  • 学科 Engineering Industrial.
  • 学位 Ph.D.
  • 年度 1988
  • 页码 332 p.
  • 总页数 332
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 一般工业技术;
  • 关键词

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