Tapered roller bearing ring double extension-sleeve forging technique

Abstract

The invention relates to a double diffusion intussusception forge technique of a bearing ring of a tapered roller, belongs to the technical field of forging of the bearing ring of the tapered roller and mainly aims at solving the problems that the existing ring forging technique is not suitable for various bearing rings of the large and medium size tapered rollers. The technique is mainly characterized in that: (1) a GCr15 steel material section is heated to 1050 DEG C on a medium frequency induction furnace, then upset on a press, extruded backward and forward, formed, sheathed respectively and is separated into an outer sleeve and an inner sleeve or a small outer sleeve blank; (2) the outer sleeve blank is ring-rolled on a ring rolling machine, then reeled on the press and cooled into an outer sleeve forged parts of a bearing; and (3) the inner sleeve or the small outer sleeve blank is placed on the press, upset again, extruded and punched and then a ring part is obtained which is ring-rolled on the ring rolling machine, then an inner sleeve hot forged part after being ring-rolled is reeled on the press and then cooled to obtain the inner sleeve forged part of the bearing. The technique is mainly used for manufacturing the inner and outer ring forged parts of the bearing of the large and medium size tapered roller with various types, small batch or large batch.

Description

technical field [0001] The invention belongs to the technical field of forging tapered roller bearing rings. Specifically, it relates to a manufacturing method for the inner and outer rings of large and medium-sized tapered roller bearings, which adopts the combination of tower forging technology and sleeve forging technology. Background technique [0002] Bearings are important basic components in the automotive industry, and as one of the bearing types, tapered roller bearings are characterized by their inner and outer sleeves are separable, easy to install, can withstand large radial and axial combined loads, large load capacity and long It has been widely used at home and abroad due to the characteristics of life. Analyzing the bearing structure, it is not difficult to find that the key to the product quality and manufacturing cost of tapered roller bearings lies in the forging process of the inner and outer ring blanks. Statistics show that 40% of the manufacturing co...

AI Technical Summary

Problems solved by technology

Since forgings are completely dependent on the operator's feel during the forming process, there are phenomena such as large size dispersion, difficult control of shape and position tolerances, and unstable quality.

Using coal, gas furnace or oil furnace for heating, the heating temperature of the billet is uneven, serious oxidation and burning loss, high energy consumption, serious pollution, labor intensity of workers, this kind of process has high processing and operation costs, and has no technical and cost advantages.

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