Key groove lineation method for making aligned tooth sample plate and used for helical gear with odd teeth

Abstract

The invention discloses a key groove lineation method for making an aligned tooth sample plate and used for a helical gear with odd teeth. The aligned tooth sample plate consists of a sample plate body (1), a bulb moving rod (2) and a nut (3). The method comprises the following steps of: screwing a screw of the bulb moving rod into an internal thread hole of a stepped through hole of the sample plate body till the bulb of a sphere exceeds the end face A of a lug boss at the lower end of the right side of the sample plate body; arranging the sample plate body provided with the bulb moving rod into an inner hole of the helical gear with odd teeth; negatively screwing the bulb moving rod, gradually screwing the bulb moving rod into a tooth groove between two adjacent oblique teeth of the helical gear with odd teeth till complete contact with the tooth groove, and then tightening the bulb moving rod at the screw of the bulb moving rod through the nut; marking a key groove width b and a key groove depth t of the helical gear with odd teeth through a key groove formed at the left end face of the inside diameter of the sample plate body and by means of a lineation pen, wherein the key groove width b can correspond to the tooth outline of the end face of a random odd tooth; and then machining the helical gear with odd teeth according to the key groove width b and the key groove depth t.

Description

technical field [0001] The invention belongs to the technical field of gear keyway scribing, in particular to a keyway scribing method for making a paired tooth template and being used for odd-tooth helical gears. [0002] Background technique [0003] The gear XC240-9 in the 3500 steckel rolling mill is a cylindrical involute helical gear. The structure of the helical gear is as follows Figure 1-2 As shown, its basic parameters are as follows: [0004] Normal modulus Mn=40mm, number of teeth Z=27, normal tooth profile angle αn=25°, pitch circle helix angle β=12°, spiral direction right-handed, addendum diameter da =1199.515mm, pitch circle Diameter d=1104.128mm, normal displacement coefficient Xn=0.20446mm, the length of the common normal across 5 teeth is 550.613mm, the upper deviation of the average length of the common normal is 0mm, the lower deviation of the average length of the common normal is -0.038mm, the tooth width B=800mm. [0005] The helical gear is proce...

AI Technical Summary

Problems solved by technology

[0009] In order to solve the problems caused by the low accuracy of manual scribing, the present invention provides a method for making a pairing template and using it for keyway marking of odd-numbered helical gears. line, which can realize that the keyway width b to be marked corresponds to the tooth profile of any odd-numbered tooth end face.

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