Improve the shaft gear hobbing processing technology fine method
Release time:
2021-12-23
The shaft gear is the main part of the gearbox, and its machining accuracy directly affects the overall quality of the gearbox. At present, we use the gear tooth processing method is hobbing a shaving method. To produce high-precision gears through the rolling and shaving process, the rolling and shaving process is well developed. The shaving accuracy depends to a large extent on the accuracy of saddle hobbing, so some error items in hobbing are strictly controlled to produce high-quality gears. Hobbing is a commonly used gear processing method, in the high precision of the hobbing machine, the use of hob, can be processed 4-5 precision gear teeth. On the ordinary hobbing machine, with ordinary precision hob, only 8 precision gear teeth can be processed. The accuracy required for the gear teeth of the gearbox shaft is 8-7-7, and the two holes and the end face are mainly used as the positioning reference when hobbing. Therefore, it is very important to analyze the error sources of hobbing and master the methods to ensure and improve the machining accuracy.
The shaft gear is the main part of the gearbox, and its machining accuracy directly affects the overall quality of the gearbox. At present, we use the gear tooth processing method is hobbing a shaving method. To produce high-precision gears through the rolling and shaving process, the rolling and shaving process is well developed. The shaving accuracy depends to a large extent on the accuracy of saddle hobbing, so some error items in hobbing are strictly controlled to produce high-quality gears. Hobbing is a commonly used gear processing method, in the high precision of the hobbing machine, the use of hob, can be processed 4-5 precision gear teeth. On the ordinary hobbing machine, with ordinary precision hob, only 8 precision gear teeth can be processed. The accuracy required for the gear teeth of the gearbox shaft is 8-7-7, and the two holes and the end face are mainly used as the positioning reference when hobbing. Therefore, it is very important to analyze the error sources of hobbing and master the methods to ensure and improve the machining accuracy.
The accuracy of shaft teeth is mainly related to motion accuracy, stability accuracy and contact accuracy. Control of common normal line length and ring gear diameter in gear hobbing
To ensure the accuracy of motion, use the control tooth profile error and base pitch deviation to ensure the accuracy of smooth work, and use the control tooth direction error to ensure the accuracy of contact. The following is an analysis of several causes of errors in gear hobbing:
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