The principle of radial shaving cutter and the advantages of radial shaving cutter

The axial shaving tooth meshing tooth surface is theoretically a point contact. During the cutting process, under the action of the feed pressure, the tooth surface expands into a relatively small oval surface contact area. If the workpiece and the razor only rotate in situ, the workpiece Only a narrow shave with the razor cutting edge width is equidistant on the tooth surface. If the shaver is specially designed so that it is in contact with the tooth flanks of the workpiece to maintain full tooth width, then the cutting edge grooves are arranged spirally along the circumference, so that the shaving cutter and the workpiece can only be rotated in situ. Shaving the entire workpiece tooth width, in order to shave to the specified tooth thickness size, just radial feed, this kind of shaving method is radial shaving.



Compared to axial shaving, radial shaving has the following advantages:


1. High processing efficiency Radial shaving Since there is no axial movement, only radial advance and retreat movement, so the processing efficiency is 1-3 times higher than the axial shaving.


2, high processing quality


● can effectively reduce or even eliminate the tooth concave phenomenon


Axial shaved tooth meshing engagement points are meshed, and there is a large opportunity for tooth pair meshing near the pitch circle, so that the tooth surface pressure increases when the pair of tooth meshes, and the resection margin at this point is also more than that of other parts. Causes tooth circles near the pitch circle. The radially shaved tooth surfaces are in line contact, so the bearing area of ​​the tooth surface meshing feed pressure is increased as compared with the ordinary shaved teeth, so that the shaving shave allowance can be made to the number of meshing tooth contact points when engaged. The sensitivity of the change is reduced so that the formation of a tooth-shaped depression can be slowed down.


●It helps to improve the surface roughness


Radial shaving is multi-edged and simultaneous cutting. Shave tooth cutting process is more stable than axial shaving, knife marks are relatively shallow, and the amount of misalignment of the cutting edge is properly selected to achieve a higher level of roughness.


● Shaved gear teeth toothing accuracy and stability


Because the axial shaving teeth have more axial movement than the radial shaving teeth, there are more links and factors affecting the shaving accuracy. First of all, under the same conditions, the rigidity of the machine is not as good as that of the radial shaving; secondly, the axial movement accuracy, the movement stability and the reliability of the shaving machine become a factor influencing the shaving precision, so the axial shaving process is not easy to stabilize and after shaving Gear tooth toothing accuracy stability is also relatively poor. Radial shave shave, because it is line contact, meshing smoothly, and no need for axial cutting, only radial feed, no axial movement, so the shaving process is stable, shaved gear teeth The accuracy is relatively stable.

3, is conducive to noise reduction gear repair


According to the different uses and requirements of automotive gears, in order to reduce the meshing noise and improve the carrying capacity, most automotive gears use a special tooth-tooth shape modification—drum shape. For the axial shave, in addition to the tool tooth shape modification, the shaver machine axial movement mechanism needs to have a drum movement function, so that the tooth-to-drum modification can be achieved. However, due to the complexity and instability of the axial movement mechanism, it is very difficult to modify the tooth profile of the axial shaving tooth, which is mainly due to the difficulty in adjusting the shape of the shaping drum and instability. The radial shave teeth tooth shape modification is achieved by grinding the teeth of the shaving cutter, which makes it easier to control the amount of shaved teeth. The shaving process is relatively stable. Therefore, the stability of shaved parts is more stable. it is good.


4, relatively high durability of shaving cutter


Radial shaved teeth Due to multiple cutting at the same time, the wear of the cutter blades is relatively uniform. Compared with the axial shaver, the average single edge shaved metal has a smaller margin, so the wear is small and the durability is relatively high. .