Improve the precision method of shaft gear hobbing processing technology
Release time:
2021-12-23
Source:
Shaft gear is the main part in the gearbox, and its machining accuracy directly affects the overall quality of the gearbox. At present, the gear tooth processing method we use is the hobbing-shaving method. To make high-precision gears through the gear rolling and shaving process, the rolling and shaving process must be brought into full play. The gear shaving accuracy largely depends on the saddle hobbing accuracy, so some error items in the gear hobbing are strictly controlled to produce high-quality gears. Gear hobbing is a commonly used method of gear processing. On a high-precision gear hobbing machine, using a hob cutter, gear teeth with a precision of 4 to 5 can be processed. On ordinary gear hobbing machines, with ordinary precision hobs, only 8 precision gear teeth can be machined. The required accuracy of the gear teeth of the gearbox shaft is 8-7-7, and the two holes and the end face are used as the positioning reference during the hobbing process. Therefore, the error source of the gear hobbing is analyzed, and the method to ensure and improve the machining accuracy is very important. important.
The accuracy of shaft teeth is mainly related to motion accuracy, stability accuracy, and contact accuracy. To control the length of the common normal line and the diameter of the gear ring in the gear hobbing process
To ensure the accuracy of movement, use the control tooth profile error and base section deviation to ensure the stability of the work accuracy, and use the control tooth direction error to ensure the contact accuracy. The following is an analysis of several causes of errors that are likely to occur in gear hobbing:
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Other Information
Material selection and gear structure analysis for gear processing
Commonly used gear materials include quenched and tempered steel
How to prevent gear deformation after quenching and tempering
We all know that gears are easily deformed during heat treatment
In terms of gear design, improper selection of parameters, too small overlap
The basic characteristics of gear transmission
The transmission power and speed range of the gear is very large
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