Study On Hob Of High Case-hardened Double Circular-arc Gear

According to the development of case-hardened gear technology, double circular-arc gear has to be the case-hardened gear. Carburizing and quenching is the most effective technique of improving the tooth flank rigidity and load capacity and is a very sophisticated technique that is suitable for involute gears. But double circular-arc gear does not adopt this technique all along because of its complicated tooth profile and without a finishing method of lower cost after it was carburized and quenched. Skiving is a way of low cost, good quality and high efficiency to overcome the above problem. It is difficult to popularize skiving technology due to the hard study on carbide skiving hob. Overcoming the difficulty well will enhance the load capacity and reliability of double circular-arc gear and enlarge its applying field and has active significance for the development of double circular-arc gear transmission.Based on the cases above, the dissertation studies the carbide skiving hob. The main works and the creative ideas are summarized as follows:1. According to the double circular-arc gear space mesh theory, the equation of rake face, the equation of relief flank of double circular-arc gear hob and the equation of the axial profile of the relief grinding wheel are deduced.2. After the rake face is reground, the equation of the tooth profile of double circular-arc gear basic worm is deduced and the error of double circular-arc gear...