Straight tooth cones are often machined with conventional milling cutters on conventional milling machines. In the following, the bevel gear on the ladle of the processing carbon plant assembly workshop is taken as an example to introduce this processing method. The bevel gear workFig. 2 Milling process 2.1 Defining the process requirements For the straight bevel gear, the general process requirements include the following: The end tooth shape is required to be accurate; | In order to ensure the accuracy of the bevel gear movement, the error of the ring gear radial runout should be within a certain range; § In order to ensure the smoothness of the bevel gear work, the gear cycle error should also be within a certain range; To ensure the backlash of the bevel gear, the error of the big end and small end tooth thickness is within the allowable range; in order to ensure the gear contact accuracy, the tooth direction error is required to be within the allowable range; the surface roughness of the a tooth surface should meet the requirements of the drawings.
Check the clamping of the tooth blank 2.3 and the clamping method of the correction tooth blank. First insert the mandrel taper shank into the main X-axis hole of the indexing head, and then tighten with the tensioning screw, then install the tooth blank. The spindle head then raises a root cone angle of 5, that is, the indexing head spindle shank 59b12c. The selection and installation of the milling cutter and the tooth profile curve of the centering bevel gear milling cutter are based on the equivalent tooth number Z of the bevel gear. This is because the large end tooth profile of the bevel gear is distributed on the back cone surface perpendicular to the pitch cone surface.
After the milling cutter is selected, the milling cutter is clamped on the arbor and corrected so that the milling cutter does not jerk radially on the arbor to make it work smoothly. When milling bevel gears, tool alignment is important and requires careful operation. In the middle of the milling groove, the center of the cutter tooth is aligned with the center of the tooth blank, so that the outer edge of the milling cutter tooth gently wipes the outer diameter of the big end, and then exits the milling cutter; then raises the table to a full tooth. High, milling all the slots in turn.
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