Method for controlling symmetry of machining keyway and center of tooth or tooth space

Abstract

The invention discloses a method for controlling the symmetry of a machining keyway and the center of a tooth or a tooth space, through which the cost is reduced, the product quality is improved, and the work efficiency is improved. The method includes following steps: 1) selecting a cross section of a single helical gear, marking the center O1 of the tooth space or the tooth on the cross section, and establishing a rectangular coordinate system XOY on a base plane by regarding a connecting line of the O1 and the center O of the cross section as a Y axis, wherein the height from the cross section to the base plane is h; 2) calculating L, wherein L=h*tan[beta], and beta is an inclination angle of the tooth space or the tooth of the single helical gear; 3) calculating a rotation angle theta, wherein theta=2*(theta / 2)=2*arcsin((L / 2) / R); 4) rotating the XOY rectangular coordinate system for the theta angle, and re-establishing an X'OY' rectangular coordinate system; and 5) milling the keyway by regarding the X'OY' rectangular coordinate system as the datum. By employing the method for controlling the symmetry of the machining keyway and the center of the tooth or the tooth space, the operation is simple, the labor intensity of workers is reduced, the work efficiency is improved by multiple times, and the quality and the precision can be guaranteed.

Description

technical field [0001] The invention relates to a method for machining a gear keyway, in particular to a method for controlling the symmetry between the machined keyway and the center of a tooth or tooth groove. Background technique [0002] As we all know: the large heavy-duty main reducer and combined reducer in hot rolling equipment, the gear keyway in the gear frame has strict symmetry requirements for the teeth or the center of the tooth groove, as well as flying shears and edge cutting equipment The keyway of the synchronous gear has a certain angle value relationship with the tooth or tooth groove. The traditional process method in the past is to use the width value of the top of the tooth to draw the line. Once the tooth is chamfered, it is very inaccurate, resulting in correlation The position deviation of parts is very large, the workload of disassembly and repair is huge, the manufacturing cost is increased, and the production cycle is lengthened. The present inv...

AI Technical Summary

Problems solved by technology

Generally, when single helical gears are assembled with herringbone teeth, the centering error is relatively large. The tooth center error of the gear shaft of the crushing shears and the keyway of the flying shears synchronous gear indirectly affects the uniformity of the shearing blade clearance when the cutting blade is installed on the drum, so the manufacturing cost Higher, higher probability of rework, longer processing cycle, even if repeated rectification using conventional process methods can not guarantee the drawing requirements, so that the processing quality and assembly accuracy can not be guaranteed

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