As a process to be realized by precision products, the situation of grinding teeth needs to be noted, and what kind of technical indicators should be achieved. This article analyzes one by one. Regarding the slewing bearing or slewing bearing, whether external or internal teeth, helical teeth, etc., the normal process level, there are gear shaping, gear hobbing, and milling gears, according to the design standard, the general standard of gear accuracy is 9 teeth or 10 teeth. Here 9-level teeth or 10-level teeth, the index to be investigated is based on the design standard of the slewing bearing of JB/T10471, and you can also refer to JB/T2300.
mainly reflects the rotation accuracy, the specific indicators are:
1, the number of teeth across and the length of the common normal;
2, common normal deviation
3. Tooth jump (tooth jump of the finished slewing bearing);
4. Tooth width, tooth thickness, tooth profile and tooth direction are generally not marked separately in the drawings.
In short, the value of the 9th grade or 10th grade of the slewing bearing is the same in a pure sense. In terms of design concepts, the common normals of grade 7 and grade 8 teeth, and the tooth jump also meets the design requirements. However, tooth surface quenching has a great impact on the accuracy of the tooth surface, generally one step backward.
The following effects can be achieved by grinding teeth:
1. Improve meshing accuracy;
2, tooth jump 0.06-0.15mm;
3, tooth surface roughness Ra0.8;
4. Reduce meshing noise;
5. Reduce the wear strength of the tooth surface.
Gear grinding, improve the roughness of the gear, and then improve the accuracy of the gear, including the common normal of the gear, the tooth jump, the smoothness has a qualitative leap, and the meshing accuracy is also greatly improved.