Study On Fine Shaping Technology Of Hard Gears

At present shaping technology is a wildly used gear cutting means of machining hard gears with high precision. However, the key to hard gear shaping process lies in design, manufacture and proper usage of hard shaper cutter. The traditional conical hard shaper cutter can't machine hard gears with high precision because of the invincible antinomy between its shaping precision and its proper cutting edge's angles to exert cutting performance. Considering this problem, in this paper a new profiling method of hard shaper cutter are discussed, which can make hard shaper cutter have not only high shaping precision but also proper cutting edge's angles.Based on the relevant movement between hard shaper cutter and grinding wheel, the movements of grinding wheel are studied. The shaping grinding point and the shaping grinding edge are made up with. In order to easily compare when shaping errors and cutting edge's angles are the most excellent, uniform expressions for convex curved rake face of hard shaping cutter and spatial cutting edge curve are separately developed. The distributions of new profiling cutter's shaping errors and cutting edge's angles are analyzed. The relevant grinding wheel and cam are designed. Due to this paper, a new profiling hard shaping cutter has been manufactured successfully. At last experiments are made to test the performance of hard shaping cutter and all kinds of precision of hard gear.