Modelling and description of the near-net-shape forging of cylindrical spur gears

Abstract

The manufacture of bevel and cylindrical spur gears by the means of applying hot or cold bulk forming processes is a quite widespread production method due to its well-known basic advantages, such as material and time cost reduction and the increased strength of the teeth. However, the associated process planning and tool design are more complicated compared with those of other conventional forging or rolling technologies. This paper aims at a concise description of some die forging operations selected as representative steps for the near-net-shape forging of spur gears. The main results are obtained on the basis of quasi-static model material experiments that have been applied to collect data needed for statistical processing or to verify some analytical solution and computer simulations. These results could be helpful in engineering practice for simple calculations in process planning design.