The design of a fixture depends a lot on the designer’s expertise and experience and hence no solution is optimal or near optimal for a given workpiece. For a Gear hobbing fixture also there are multiple designs possible. This paper is about redesigning of a hobbing fixture to make it common for the other gears’ manufacturing and reduce the no of settings of the fixture on the hobbing machine. ...

An experimental study of the effect of fixtureworkpiece conformability on system static stability is presented. Conformability is defined as the geometric similarity between the workpiece and the smallest polyhedron fit over all fixture-workpiece contacts. Two metrics, C1 and C2, are introduced to quantify global and local conformability, respectively. The elastic displacement of the workpiece ...

This paper presents a new fixture design methodology for sheet metal assembly processes. It focuses on the impact of fixture position on the dimensional quality of sheet metal parts after assembly by considering the effect of part variation, tooling variation and assembly springback. An optimization algorithm combines finite element analysis and nonlinear programming methods to determine the op...

The geometric errors in the manufacturing process can be reduced by optimal positioning of the fixture elements in the fixture to make the workpiece stiff. We propose a new fixture layout optimization method N-3-2-1 for large metal sheets in this paper that combines the genetic algorithm and finite element analysis. The objective function in this method is to minimize the sum of the nodal defle...

The essential factor for the recent manufacturing companies is to develop a variety of products within short timeframes. Therefore, the flexible manufacturing techniques are rapidly growing to compete the markets globally. A number of factors contribute in organizational ability to achieve flexibility and one of which is the use of fixtures to increase the pace of production. A fixture is like ...