Fixtures are used to locate, hold and support workpieces in manufacturing operations such as machining, inspection, and assembly. Researching the possibilities for fixture design optimization has been in the sphere of interest of a number of authors worldwide for a longer period. Fixture design process and fixture design technique with conventional methods have been obsolete. Genetic Algorithm ...

A fixture is a mechanism used in manufacturing to hold a workpiece, position it correctly with respect to a machine tool, and support it during machining. Typically, fixture design involves the identification of clamp, locator, and support points, and the selection of corresponding fixture elements for their respective functions. The automation of fixture design activities in manufacturing is a...

This paper addresses two major issues in fixture layout design: (1) to determine the feasible fixture configurations that satisfy fundamental requirements such as kinematic localization and total fixturing (formclosure) and (2) to evaluate the acceptable fixture designs on several quality criteria and select the optimal fixture appropriate with practical demands. The performance objectives cons...

This paper presents a method to design fixtures for complex objects in robotized environments. The object is described with a set of points on its surface. First, an initial formclosure fixture is found with an iterative algorithm. The initial fixture is then improved with an iterative approach relying on a geometrical reasoning that efficiently looks for a locally optimum fixture; the quality ...

PURPOSE The purposes of this study were to investigate the internal structure of the edentulous zygomatic bone, which provides anchorage for the zygomatic fixture, using micro-computed tomography, and to examine the relation between the internal structure of the edentulous zygomatic bone and the zygomaticus fixture. MATERIALS AND METHODS Twenty-eight zygomatic bones of edentulous maxillae fro...

Finite element (FE) analysis is very useful in the early stage of a fixture development in order to reduce or eliminate design problems. Accurate prediction of fixture-workpiece deformation requires an appropriate representation of the contact relationship between fixture elements and workpieces. The paper addresses the special features of the deformation analysis between complicatedly shaped c...