INFLUENCE OF FRICTION ON INCREASE STIFFNESS OF MODULAR FIXTURE SYSTEMS

The idea of development of modular fixture systems increased level of stiffness and flexibility based on modular fixture systems that are in the basic form of framed structures. It is assumed that the concept of forming assemblies of modular fixture systems provide greater rigidity and flexibility, greater reliability, which is especially important if you take into account the possible use of these accessories when processing on modern multi-axis numerical machines in which at once basing and tightening treatment performed with a number of different tools. The friction between structural elements of the modular fixture systems are analyzed.Publishe

Fixture layout design based on a single-surface clamping with local deformation

© 2015, Vienna University of Technology. All Right Reserved. Proposed in this paper is a novel approach to fixture layout design. The contact interface between workpiece and fixture is reduced to a single workpiece surface. This allows reliable machining of the remaining five workpiece surfaces in a single setup. Workpiece clamping is performed by inserting special elements into prepared auxiliary openings on the workpiece. Clamping is thus reduced to indenting of sharp clamping element tips into the workpiece surface. Shallow indenting is performed on surfaces which have no practical function. Special device was designed to allow experimental investigation. Experimental results point towards the efficiency of the proposed approach. Workpiece displacements were small during machining and allowed the required machining accuracy. Furthermore, the results obtained during machining indicate high surface quality