The valve worm gear box and the worm gear head are gears that mesh with the worm and have unusual tooth shapes.The cutting of worm gear teeth is usually done with a gear hobbing machine, which requires two methods: gear hobbing and flying knife gear cutting.When manufacturing precision worm gears, finishing processing such as gear shaving, gear honing or gear grinding can be carried out after gear hobbing or gear cutting.  
滚齿   
The worm gear hob with the same basic parameters as the working worm is adopted, and the tooth shape is cut out according to the development method.If the radial feed method is adopted for hobbing, the hob and the workpiece will be rolled according to the transmission ratio of Z 2/Z 1 (Z 1 is the number of working worm ribs, Z 2 is the number of worm gear teeth), and the two gradually approach until the center The distance is equal to the center distance when the working worm and the worm gear are engaged.When adopting the tangential feed method for gear hobbing, in addition to guaranteeing tool changes, the machine tool must also have axial feed; the worktable of the same machine bed should also be equipped with corresponding additional movable springs to achieve generative motion, which requires the use of differential Dynamic chain.Therefore, the machining accuracy of the tangential feed method is usually not as good as that of the radial feed method, but the quality of the tooth surface is better, and it will not cause the phenomenon of undercutting.The accuracy of the hobbing worm gear is usually up to 6 to 8 (JB162-60).  
The gear hobbing of precision worm gears needs to be carried out on a high-precision indexing worm gear hobbing machine with a high-precision hob. A machine or electronic transmission chain error correction device can also be installed on a general-purpose hobbing machine to improve processing accuracy. Up to level 3.   
Flying knife cutting teeth   
The flying knife is equivalent to a tooth of a worm gear hob.The flying knife can only adopt the tangential feed method. On the hobbing machine or the flying knife rotates the worm wheel to turn Z 1 tooth, plus the tangential feed of the flying knife and the additional movable spring of the worktable, it can also be developed by According to the law, the accurate tooth shape can be cut out, and the accuracy can reach 7 to 8.The flying knife is easy to manufacture, but the production rate of cutting teeth is low, and it is suitable for single-piece production and repair work.   
剃齿   
The basic parameters of the worm gear shaving cutter are the same as those of the working worm.Worm gear shaving usually uses a gear hobbing machine, or a gear shaving cutter mobilizes the worm gear to cool the gear. It can also be forced to shaving under the control of the machine tool transmission chain. The quality and accuracy of the shaving tooth surface have improved.
Honing and grinding teeth   

After worm gear hobbing or flying knife gear cutting, in order to improve the quality of the tooth surface and improve the engagement of the worm gear and the worm, the gear hobbing machine can be honing or grinding the gear.The honing tool is a honing worm made by casting a mixture of abrasive, plastic and resin on the substrate; when grinding the tooth, the grinding worm made of cast iron is added with abrasive and the worm wheel is used for grinding.

Zhengzhou Ever-Power Co., Ltd. produces wholesale customized standard parts, fasteners, various specifications of bolts, nuts, valve stems, worm gear boxes, bevel gear boxes, etc. For details, please refer to the company’s official website http://www.worm-gearbox. xyz/