Deformable sheet metal fixturing: Principles, algorithms, and simulations
Deformable sheet metal fixturing: Principles, algorithms, and simulations
复制标题
DOI：
10.1115/1.2831031
复制
发表时间：
1996-08-01
影响因子：
4
通讯作者：
Yuan, JX
中科院分区：
文献类型：
--
作者：
Cai, W;Hu, SJ;Yuan, JX
夹具设计是所有制造操作中的重要考虑因素。该设计的核心是选择和定位定位点。虽然在该领域存在大量文献，但大多数文献是针对棱柱形或实心工件的。本文论述了钣金夹具的设计。提出并验证了“N-2- 1”定位原理对可变形钣金件的定位是有效的，而对刚体的定位则采用“3 -2- 1”定位原理。基于“N-2- 1”原理，提出了用有限元分析和非线性规划方法求解最佳“N”定位点的夹具优化设计算法，使可变形板料的总变形量最小。介绍了一个名为OFixDesign的仿真软件包，并给出了数值例子来验证“N-2- 1”原理和最优钣金夹具设计方法。
Fixture design is an important consideration in all manufacturing operations. Central to this design is selecting and positioning the locating points. While substantial literature exists in this area, most of it is for prismatic or solid workpieces. This paper deals with sheet metal fixture design. An ''N-2-1'' locating principle has been proposed and verified to be valid for deformable sheet metal parts as compared to the widely accepted ''3-2-1'' principle for the rigid bodies. Based on the ''N-2-1'' principle, algorithms for optimal fixture design are presented using finite element analysis and nonlinear programming methods to find the best ''N'' locating points such that total deformation of the deformable sheet metal is minimized. A simulation package called OFixDesign is introduced and numerical example are presented to validate the ''N-2-1'' principle and optimal sheet metal fixture design approach.