What standards should be noted for gear machining?
1. Gear processing mainly controls the transmission accuracy between gears during operation, such as the smoothness of transmission, fluctuation of instantaneous speed, whether there is alternating reverse operation, whether the tooth gap is small, and whether there is impact load. The accuracy should be slightly improved to reduce the damage caused by impact load to the gears.
2. If the above design requirements are relatively high, the gear accuracy should be set higher, and vice versa.
3. However, if the gear accuracy is set too high, it will increase processing costs and overall balance.
4. The parameters above are basically commonly used gears, and the accuracy can be set to 7FL or 7-6-6GM. Explanation of the accuracy flag:
7FL: Gear machining indicates that the accuracy of the three tolerance groups of the gear is the same as level 7, with an upper deviation of level F for tooth thickness and an lower deviation of level L for tooth thickness. 7-6-6GM: The tolerance zone accuracy of gears is level 7. The accuracy of the two sets of tolerance zones for gears is level 6, while the accuracy of the three sets of tolerance zones for gears is level 6. The upper tooth thickness deviation is G, and the lower tooth thickness deviation is M.
5. There is no calculation formula for gear accuracy, as it is not calculated and was obtained through consulting the manual.
6. The determination of accuracy level is the result of comprehensive analysis by engineers. If the transmission requires high and alternating loads, the level will be set higher.
7. There are 5, 6, 7, 8, 9, and 10 levels of accuracy. The smaller the value, the higher the accuracy.
8. The deviation level (tooth thickness) is also given by the designer based on specific working conditions. Precision transmission is higher, general machinery is lower, closed transmission is higher, and open transmission is lower.
