Computerized design and generation of worm gear drives with stable bearingcontact and low transmission errors

The authors propose a new approach for design and generation of low-noise, stable bearing contact gear drive with cylindrical worm. The approach is ba sed on application of an oversized hob and varied plunging of worm generati ng tool. It is discovered that without plunging positive transmission error s occur (that are unacceptable for favorable conditions of force transmissi on). A predesigned parabolic function is provided that is able to absorb tr ansmission errors caused by misalignment and reduce the level of vibrations , especially in the case of application of multi-thread worms. The develope d approach is tested by computerized simulation of meshing and contact by t he developed computer program. The investigation is accomplished for a worm -gear drive with the Klingelnberg type of the worm that is ground by a circ ular cone, but the proposed approach may be applied for other types of worm gear drives with cylindrical worms.