| 摘要 |
The invention relates to a process and tool for cutting the teeth of front worm wheels with inverted conicity used for meshing with a joint tapered worm. The claimed process consists in that the cutting process where there are generated the flanks of the worm wheel by milling uses the method of axial advance on the toothing machine so that the gear hob simultaneously works on the entire width of the cutting component and the main cutting motion and also the advance motion in the axial plane of the wheel are ensured by the rotary motion of the gear hob, the semifinished wheel performing the rotary motion corresponding to the gear transmission ratio. The tool claimed by the invention is a gear hob with inverted conicity which has a geometry quasi-identical with the geometry of the gear worm, the geometry of the profile of the generating flanks being asymmetrical, namely the bearing flank angle ranges between 10...18° and the support flank angle ranges between 20...30° and the gear hob is carried out in a monoblock constructive structure having the following components: a control collar (), an active area, a cutting component (), a neck () of the gear hob, a nose radius () with a shoulder () of the gear hob, a tool shank () which ensures the fastening of the gear hob into the bracket, so that the cutting process where there are generated the flanks of the worm wheel is carried out on the entire width of the cutting component of the gear hob, and the profile of the gear hob teeth has an asymmetry in the axial plane, according to the profile explained in a detail (). |
