The design of a strain gage dynamometer to measure three-dimensional grinding forces during surface finishing of molds and dies is presented in this article. The dynamometer is composed of four measuring blocks to which strain gages are attached. The measuring blocks in this study were designed so that when strain gages are attached at particular places, the blocks deform in such a way that forces in the x, y, and z directions can be separated with little interaction. This behavior was confirmed with finite-element results, and static calibrations performed on the measuring blocks further verified this behavior. In this study, the dynamometer is used to measure grinding forces in a surface-finishing system with a hand grinder mounted on a spindle of a machining center.
Journal of Materials Engineering and Performance 14(2), p.173-178