关键词: 直齿锥齿轮, 近净成形, 数值计算, 齿形精度, 轴向修形

Abstract:

For the problem that tooth profile accuracy was not required high and modification was not full of consideration in straight bevel gear plastic forming process, a straight bevel gear tooth profile accuracy control method was proposed with near net forming based on the numerical calculation, then a detailed description of the process was carried out. The car differential planetary gear was studied by digital modeling, contact analysis, forming process finite element simulation and springback law calculation. The results display that the minimum rebound appears at drum and gradually increase to the tooth point or tooth root in the height of tooth direction. Maximum springback is up to maximum 0.14mm, and minimum 0.02mm closed to the tooth top. Twice modification was carried out to control accuracy of tooth profile and the maximum deviation value is up to -0.025mm while the minimum was close to zero. The results show that this method can use the near net shape process to obtain higher profile accuracy straight bevel gear products.

Key words: straight bevel gear, near net shape, numerical calculation, profile accuracy, axial modification