Wind power generation rotary bearing dual-track intermediate frequency induction hardening process

Abstract

The invention discloses an intermediate-frequency inducing and quenching technique for double tracks of a pivotal bearing for wind power generation, a profile modeling inductor is adopted for aiming at the bearing tracks, continuously implementing even intermediate-frequency heating and spraying a cooling liquid so as to implement quenching, the inductor is static and does not move, a workpiece rotates so as to implement quenching, and when an upper-track bearing is quenched, a lower-track bearing is cooled and protected; when the lower-track bearing is quenched, the upper-track bearing is cooled and protected. Aiming at resolving the problem that existing quenching techniques can not satisfy the quenching requirement of a double-rollway bearing, the heat treating technique that is specifically used for the quench processing of the double-rollway bearing is provided. By adopting double-rollway quenching, wherein, one rollway is heated and quenched, the other rollway is cooled and protected, the quenching and the protecting are implemented at the same time, thus having high depth of a hardening layer and good physical performance of the quenching workpiece.

Description

technical field [0001] The invention relates to a quenching process, in particular to a rotary bearing quenching process. Background technique [0002] Generally, slewing bearings include two types of right-angled surfaces and arcuate surfaces, and are generally single raceways. The traditional heat treatment process is to place the workpiece on the workbench (flat or oblique), and the sensor is still (can be Floating), use the profiling sensor to align the raceway, heat and spray coolant to quench. The workpiece rotates continuously, there is a handover soft belt, the power frequency is 8000HZ, the material is 50Mn or 42CrMo, the hardness requirement is 55-60HRC, the hardened layer requires 2-4mm, the heating temperature is 870-890°C, and the cooling liquid is a slow cooling water solution. [0003] The current wind power generation slewing bearing has double raceways and the distance between the raceways is 14mm-20mm, and the distance is relatively small. The hardened la...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a heat treatment process specially used for the quenching treatment of double raceway bearings in view of the fact that the existing quenching process cannot meet the quenching requirements of double raceway bearings