Process method for quenching rotary support gear

Abstract

The invention discloses a process method for quenching a rotary support gear. The method comprises the main steps of carrying out rough turning, finishing turning, gear shaping, quenching and tempering on an inner ring and an outer ring of the rotary support gear; an inductor of a quenching device for quenching adopts a medium frequency quenching inductor; the quenching liquid is PGA (polyglycolic acid) quenching liquid; the quenching device comprises a rotary workbench; one side of the rotary workbench is provided with a fixing base capable of vertically moving; a slide base that moves horizontally is erected on a horizontal side plate on one side of the fixing base; the slide base is fixedly provided with a transformer for driving the medium frequency quenching inductor and assisting a localizing guide rod to operate; the induction head on the front end part of the medium frequency quenching inductor is trapezoidal; a coupling gap between the induction head and the dental groove corresponding to the induction head is reserved when the induction head matches with the dental groove corresponding to the induction head; in the quenching process, the process parameters such as the coupling gap between the medium frequency quenching inductor and the dental groove, the entering depth of the current, the speed of the dental groove line, the temperature and the concentration of the quenching liquid are set and regulated; and, the method provided by the invention enhances the quenching quality, and is particularly suitable for the quenching need of the rotary support gear made of the material 50 Mn or the material 42 CrMo and with the module of gear more than 6.

Description

technical field [0001] The invention belongs to the field of processing and manufacturing of slewing bearings, in particular to a process method for quenching gears of slewing bearings. Background technique [0002] The slewing bearing industry has experienced more than 30 years of development in my country. Since the first release of the JB2300-84 "Slewing Bearing Form, Basic Parameters and Technical Requirements" standard in 1984, and the JB / T2300-1999 "Slewing Bearing" revised in 1999 Standard, now our country already has the comprehensive development capability of perfect slewing ring design, manufacture and test. At the same time, different industries have put forward their own standards for slewing bearings, such as wind power generation, construction machinery, bearing industry, etc. It can be seen that the products are gradually entering a competitive situation of refinement and variety. [0003] At present, the single-row four-point contact ball slewing bearing is t...

AI Technical Summary

Problems solved by technology

Slewing ring bearings generally have mounting holes, internal or external gears, lubricating oil holes and sealing devices, which can make the design of the main engine compact, easy to install, and long in service life. The transmission form is mainly gear transmission, which is generally the same as this It is paired with a small gear, and the load on the rotation will be handled by the gear meshing movement, and the contact surface of the gear is theoretically a line contact. As far as a single tooth is concerned, the load on the tooth surface is relatively concentrated, especially the frequent irregular The impact load generated by the rotating motion makes the gear stress state very bad, and it will cause the gear to break directly. This is also the equipment failure of the heavy machinery (such as tower crane, excavator, ship machinery, wind turbine, etc.) used by the slewing ring. In addition to the factors considered in the design, how to meet the technical parameters required by the design, that is, the satisfaction of the process capability is very important, but in the existing gear quenching process, it is difficult to meet the design requirements technical parameters

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