Technological System Strength Load Influence on the Flat Surface Machining Accuracy in Face Milling

Abstract

In engineering technology there is always a problem to improve the accuracy of manufacturing parts. When machining, the arising forces cause both tool and work-piece displacements. In this paper we consider the influence of changing cutting forces on the machining errors that arise in face milling of flat surfaces. With this approach to machining, the cutting forces depend on the work-piece width, the cutter diameter, the number of teeth and their geometry, the mutual bracing of the cutter and the work-piece, and the application point of the resultant force. The paper presents the dependences, allowing us to calculate the cutting force in face milling. The proposed model allows us to determine the vector of deviations in the instantaneous (fixed in time) arrangement of the cutter teeth at the specific points of the surface machined, since different cutting forces act on each tooth on the arc of the contact with the surface. It is recommended that the resulting errors arising from the elastic deformation of the technological system should be evaluated by the vector field, which represents deviations of points of the real surface profile from their nominal position, due to action of the variable cutting forces within one turn of the cutter.