Cutting Forces in Gear Hobbing (1st Report)

The knowledge of the hobbing forces is very useful to the design of hobbing machines, the analysis of vibrations and the decision of optimum cutting conditions for the improvement of the accuracy of hobbed gears, etc. This paper shows the measuring system of the three components of the hobbing force. In this paper, specially shaped workpieces having the width of one pitch tooth space are used in order to investigate the hobbing force of each hob tooth in detail. From the forces measured on the workpiece, the tangential, radial and thrust components on each tooth of the hob and workpiece can be obtained. As a result, the magnitude and nature of the three components of hobbing forces in various hobbing processes are clarified.