Study on the CNC internal gear form grinding technology

Gear grinding is widely used for finishing gears with hard face. Gear form grinding has many advantages over gear generation grinding. The form grinding accuracy depends on the form wheel dressing technology to a great extent. In order to ensure the tooth profile accuracy, a kind of form wheel dressing device by using diamond wheel as dressing tool is developed. Based on the involute interpolating principle, the NC program for form wheel dressing is prepared, and the dressing motion is controlled by NC controller. It is also very important for gear teeth to be evenly distributed in a circle so as to reduce pitch error. A kind of gear grinding method named jumping division is proposed in order to improve tooth division accuracy, and CNC gear grinding program is also developed. The grinding wheel dressing experiment and gear grinding test are carried out on the autonomous developed CNC internal gear grinding machine. Internal gear grinding experiment validates the grinding technology proposed in this article.