The analysis of gear processing technology must be carried out before processing, including the working conditions of the gear, the function of the gear and the change of the load it bears. The corresponding process route should be formulated according to the actual situation of the gear service, and the processing plan should be optimized. While ensuring that the gear accuracy meets the processing requirements, the economy of processing should be met, the efficiency and quality of processing should be ensured, and the service life of the gear should be improved. Confirm the processing plan. The machining plan is the prerequisite for the start of machining. A specific machining plan should be formulated according to the working conditions and stress conditions of the gear and in combination with the existing machining equipment and environment.
Take a common transmission gear as an example. The gear module is 2 and the tooth number is 44. The tooth profile deviation of the gear is 0.0075mm, the deviation of a single gear is 0.011mm, and the machining accuracy is required to be above IT7. The gear is subject to alternating loads of different sizes for a long time, which is prone to wear and tooth breakage. On the basis of the above basic parameters, the design is carried out according to the conventional gear machining process plan. In order to ensure the quality of the gear, after comprehensive comparison and analysis of various plans, the plan is optimized, and finally the preliminary gear machining process is obtained. After determining the processing plan, it is necessary to process according to relevant standards to ensure the quality of gear processing.
Selection of blank. The main function of gears is to transmit power and change the direction of torque. Therefore, gears are often subject to various alternating stresses in actual working conditions, resulting in deformation, wear and tooth breakage of gears. Therefore, when selecting gear materials, we should try to select materials with high hardness, strong toughness and other comprehensive properties, so as to further ensure the quality and performance of gears and achieve the goal of improving the safety and stability of mechanical equipment. On the other hand, forging is the best way to form the gear blank, because the forged parts can obtain better toughness and strength. After forging, it is also necessary to carry out spot check on the forging blank streamline, metallographic structure, decarburization layer depth, grain size and other aspects in time. According to the above description, the gear blank material can be selected as 20CrMnTi.