Quenching method of soft band free slewing bearing sleeve ring

Abstract

The invention discloses a quenching method of a soft band free slewing bearing sleeve ring. The quenching method comprises the following steps that firstly, a workpiece is located, wherein the workpiece is horizontally mounted on a work platform of a machine tool and fixed; and secondly, the position of the circle center of the workpiece is determined, wherein a distance measuring sensor is mounted on a spindle of the machine tool. According to the quenching method, the operation process is simple and convenient, the center of a slewing bearing can be located before quenching, and motion accuracy of induction heaters and cooling devices is guaranteed; the two induction heaters move in the opposite directions at the same time to achieve the soft band free heat treatment process of a slewingbearing roller way; heating and cooling on the surface of the roller way are carried out at the same time, no soft band area is generated, and therefore the situation that cracks are generated to thesurface of the roller way due to secondary heating is avoided, and a low-hardness area formed by quenching is also avoided; and meanwhile, the slewing bearing heat treatment step is simplified, the work efficiency is improved, and the service life of the slewing bearing can be prolonged easily.

Description

technical field [0001] The invention belongs to the technical field of heat treatment technology for slewing bearings, and in particular relates to a quenching method for slewing bearing rings without soft belts. Background technique [0002] The slewing ring is a large bearing composed of inner and outer rings and rolling elements that can bear comprehensive loads, and can simultaneously bear large axial and radial loads and overturning moments. Slewing bearings are used in various construction machinery and rotary worktables. They are an important part of the slewing mechanism of construction machinery. They have high requirements for the quenching quality of their raceways. Generally, their surfaces are required to have high hardness and wear resistance. The material inside the raceway still maintains its original ductile structure. For large-diameter slewing bearings, medium-frequency induction hardening is usually used. Because medium-frequency induction hardening has ...

AI Technical Summary

Problems solved by technology

Since the existing technology cannot avoid the generation of hardened soft belts, the direction of the load must be considered during the installation of the slewing ring. Therefore, it is necessary to place the soft belts in non-main load-bearing areas as much as possible to prevent the contact area between the soft belts and the rollers from being subjected to motion loads. The transitional wear in the process leads to the overall scrapping of the slewing bearing, but such an operation method limits the scope of use of the slewing bearing, reduces the service life of the slewing bearing, and increases the maintenance cost of the equipment later, which has become an important factor restricting the development of slewing bearing enterprises in my country. factor

[0004] In the prior art, in order to avoid hardening soft bands, after the workpiece is clamped and fixed, an intermediate frequency induction hardening device is used to heat and quench the outer surface of the slewing bearing along a specific guide rail. This working method requires a lot of preparation time. inefficiency

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