Static interactions of surface contacts in a fixture–workpiece system

IF 1.2 Q4 COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS

INTERNATIONAL JOURNAL OF COMPUTER APPLICATIONS IN TECHNOLOGY Pub Date : 2014-08-04 DOI:10.1504/IJCAT.1997.062244

N. Wu, Ka-Ching Chan, S. Leong

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引用次数: 9

Abstract

Static indeterminacy and frictional constraint nonlinearity are common problems encountered in fixture configuration design. In a fixture–workpiece system, the behaviour of contact is influenced by a combination of geometrical, kinematic and elastic relationships. Our objective is to determine clamping force intensities for a given layout of fixels by investigating contact force distribution. In this paper, we present a numerical procedure to accurately determine clamping forces required to satisfy fixturing requirements with good computational efficiency. A system of virtual springs is used to illustrate the states of contact restraints at locating and clamping points. The differences between manual clamping and power clamping are investigated and analysed theoretically. A cone set of virtual springs is introduced to model a frictional contact. We then develop a linear programming model to find a set of minimum clamping force intensities, and to identify their feasible directions for increments. Examples are also given to demonstrate the procedure.

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夹具-工件系统中表面接触的静态相互作用

静态不确定性和摩擦约束非线性是夹具结构设计中常见的问题。在夹具-工件系统中，接触行为受到几何、运动和弹性关系的综合影响。我们的目标是通过调查接触力分布来确定给定固定布局的夹紧力强度。在本文中，我们提出了一个数值程序，以准确地确定所需的夹紧力，以满足夹具的要求，具有良好的计算效率。用一个虚拟弹簧系统来说明定位和夹紧点处的接触约束状态。对手动夹紧与动力夹紧的区别进行了理论分析。引入一组圆锥体虚拟弹簧来模拟摩擦接触。然后，我们开发了一个线性规划模型，以找到一组最小夹紧力强度，并确定其增量的可行方向。文中还给出了实例来说明该方法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

INTERNATIONAL JOURNAL OF COMPUTER APPLICATIONS IN TECHNOLOGY COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS-

CiteScore

2.80

自引率

45.50%

发文量

期刊介绍： IJCAT addresses issues of computer applications, information and communication systems, software engineering and management, CAD/CAM/CAE, numerical analysis and simulations, finite element methods and analyses, robotics, computer applications in multimedia and new technologies, computer aided learning and training. Topics covered include: -Computer applications in engineering and technology- Computer control system design- CAD/CAM, CAE, CIM and robotics- Computer applications in knowledge-based and expert systems- Computer applications in information technology and communication- Computer-integrated material processing (CIMP)- Computer-aided learning (CAL)- Computer modelling and simulation- Synthetic approach for engineering- Man-machine interface- Software engineering and management- Management techniques and methods- Human computer interaction- Real-time systems