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Large-scale self-aligning roller bearing ring quenching and cooling method

A technology for spherical roller bearings and bearing rings, which is applied in the direction of furnace types, furnaces, heat treatment equipment, etc., can solve the problems of hard quenching of bearing rings and uneven distribution of quenching stress, and achieve the reduction of quenching stress and cooling Homogeneous, deformation-cracking-reduced effect

Active Publication Date: 2011-06-08
DALIAN METALLURGICAL BEARING
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] The purpose of the present invention is to provide a quenching and cooling method for large spherical roller bearing rings, which not only solves the problem that the inner surface of the bearing ring is not hardened, but also solves the problem of uneven quenching stress distribution of the ring during the cooling process

Method used

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  • Large-scale self-aligning roller bearing ring quenching and cooling method
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  • Large-scale self-aligning roller bearing ring quenching and cooling method

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Embodiment Construction

[0013] The quenching and cooling method for large spherical roller bearing rings, the technical key point is that the bearing rings use an air-cooling quenching device during the quenching process. The air-cooled quenching device includes an oil cylinder 1 and a cooling mechanism arranged at the bottom of the oil cylinder 1 . The cooling mechanism includes an outer annular blast pipe 2 , an inner annular blast pipe 3 and four supports 4 with the same structure. 32 air outlets 5 are evenly distributed on the circumference of the outer annular blast pipe 2, and 16 air outlets 6 are evenly distributed on the circumference of the inner annular blast pipe 3. The four brackets 4 are evenly distributed on the circumference, and the upper ends of the four brackets 4 are respectively inserted between the outer annular blast pipe 2 and the inner annular blast pipe 3, and are welded to the outer annular blast pipe 2 and the inner annular blast pipe 3 respectively. connect. The lower en...

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Abstract

The invention discloses a large-scale self-aligning roller bearing ring quenching and cooling method. In the method, a bearing ring is in flat suspension above a cooling mechanism in quenching oil in a cylinder by a toplift; the cooling mechanism comprises two concentric circuit blowpipes provided with a plurality of air outlets; the two circuit blowpipes are respectively connected with a first blast pipe and a second blast pipe which are connected with a pressured air source. When the bearing ring is quenched, air under the pressure of 5-10kMPa is ejected from the air outlets of the two circuit blowpipes to form a strong recycled oil stream so as to lead the self-aligning roller bearing ring to realize cooling and quenching. In the invention, the cooling speeds of the inner surface and the outer speed have little difference, the cooling is even, the quenching stress is reduced, the tendency of deformation and cracking is reduced, the hardness is improved and product quality is also greatly enhanced.

Description

technical field [0001] The invention relates to the technical field of quenching of large spherical roller bearing rings. Background technique [0002] The effective thickness of large-scale products is relatively thick, generally above 60mm, the width is wide, the outer diameter is large, and the difference between the thickest part and the thinnest part of the ferrule is too large. device, far from satisfying the desired cooling effect. During quenching and cooling, a situation of uneven cooling is formed: due to the bearing structure, during the quenching process, the center swells, while the two sides shrink, which is reflected in the outer diameter of the quenched part is convex in the middle, resulting in bending tensile stress, and finally on the outside Cracks at the stress concentration of radial lubricating oil grooves. [0003] Firstly, due to the forced cooling of the outer surface by the paddle machine, the cooling speed is very fast and the cooling is relativ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D9/40C21D1/18
Inventor 戚辉李善文孙克钧
Owner DALIAN METALLURGICAL BEARING
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