T Slot Indexable Milling Cutters Class A High Speed With Coating

High Speed Indexable Transformer T-Slot Cutter With Coating

Processing quality
(1) When the tooth profile accuracy of gear shaping is higher than that of gear hobbing, the number of tangents forming the profile envelope is only related to the number of hob flutes and the number of basic worm heads. It cannot be changed by changing the processing conditions. Increase or decrease; however, when gear shaping, the number of tangents forming the tooth envelope is determined by the size of the circular feed, and can be selected. In addition, when manufacturing the gear hob, a worm with a similar shape is used to replace the involute basic worm, which has a shape error. The tooth shape of the gear shaper is relatively simple, and the precise involute tooth shape can be obtained by high-precision grinding. Therefore, gear shaping can obtain higher tooth profile accuracy. (2) The roughness of the tooth surface after gear shaping is thinner than that of gear hobbing. This is because the hob makes intermittent cutting in the tooth direction during gear hobbing; while the cutting along the tooth direction is continuous during gear shaping. Therefore, the roughness of the tooth surface is relatively fine when the tooth is shaped. (3) The movement accuracy of gear shaping is worse than that of gear hobbing. This is because the transmission chain of the gear shaping machine has one more tool worm gear pair than the gear hobbing machine, that is, there is a part of the transmission error. In addition, one tooth of the gear shaper cutter corresponds to one tooth slot of the workpiece, so the cumulative error of the circumference of the gear shaper itself will inevitably be reflected on the workpiece. When hobbing, because each tooth slot of the workpiece is machined by the same 2 to 3 circles of teeth of the hob, the cumulative error of the tooth pitch of the hob does not affect the pitch accuracy of the processed gear. The motion accuracy is higher than gear shaping. (4) The tooth orientation error of gear shaping is larger than that of gear hobbing. The tooth orientation error during gear shaping is mainly determined by the parallelism error between the rotation axis of the main shaft of the gear shaping machine and the rotation axis of the table. Due to the high frequency of reciprocating motion of the gear shaping cutter during operation, the wear between the main shaft and the sleeve is large, so the tooth orientation error of the gear shaping is larger than that of the gear hobbing. Therefore, in terms of machining accuracy, gears that do not require high motion accuracy can directly use gear shaping to finish the tooth shape, while for gears that require higher motion accuracy and pre-shaving gears (shaving teeth cannot improve the motion accuracy), It is more advantageous to use hobbing.