Process for quenching hard-tooth surface canine tooth loop intermediate-frequency edge roller seating space

Abstract

The invention provides a technique for quenching along the tooth space of a large tooth ring with hardened tooth surfaces on a medium-frequency basis, particularly for quenching and tempering the tooth surfaces along the tooth space on a medium-frequency induction basis. The technique comprises the following steps: 1), carrying out the tool preparation and on-site installation before quenching and tempering; 2), manufacturing medium-frequency copying inductors heating-quenching along the tooth space and taking the shape similar to the profile of the tooth space, and quenching and back-cooling the tooth surfaces in a synchronous manner; 3), quenching at intervals of 3 tooth spaces, wherein, one round of the rotation of the parts, that is, 54 teeth, constitutes a working cycle; 4) testing the hardness of a first quenching tooth surface every cycle; and 5), carrying out the tempering heat treatment in a half-tooth ring manner after the surface is quenched. The quenching level of the tooth surfaces of the large tooth ring with the hardened tooth surfaces reaches HRC40-45; the depth of effective hardening layers is larger than or equal to 4mm; the accuracy of the tooth wheel reaches the 988GE level; the tooth ring has the advantages of light and handy structure, large size and service life as long as two times of the ordinary tooth ring with the same specification; and the technique remarkably reduces the weight of the equipment, improves the reliability thereof, and improves the running efficiency thereof.

Description

[0001] Field: [0002] The invention relates to a quenching process, in particular to an intermediate frequency quenching process along the tooth groove of a large gear ring with a hard tooth surface. technical background: [0003] At present, in China, rough boring-rough turning-normalizing-boring-turning-tempering-boring-turning-semi-finishing rolling-quenching and tempering-correction-boring-finishing turning-finishing rolling into teeth and other machining and manufacturing pellets Due to the existing quenching and cooling methods and tempering process defects in the large ring gear with hard tooth surface for kiln, the surface quenching of the tooth part of the ring gear cannot reach HRC40-50, the effective hardened layer depth is less than 4mm, and the gear precision is less than 988GE , The quenching deformation is large, the water quenching is too intense, the ring gear is easy to crack, the yield is low, the life of the ring gear is too low, the cost is high, and the ...

AI Technical Summary

Problems solved by technology

[0003] At present, in China, rough boring-rough turning-normalizing-boring-turning-tempering-boring-turning-semi-finishing rolling-quenching and tempering-correction-boring-finishing turning-finishing rolling into teeth and other machining and manufacturing pellets Due to the existing quenching and cooling methods and tempering process defects in the large ring gear with hard tooth surface for kiln, the surface quenching of the tooth part of the ring gear cannot reach HRC40-50, the effective hardened layer depth is less than 4mm, and the gear precision is less than 988GE , the quenching deformation is large, the water quenching is too intense, the ring gear is easy to crack, the yield rate is low, the life of the ring gear is too low, the cost is high, and the large ring gear is an integral structure