Composite forging inner/outer same set process of small-medium size British system conical bearing sleeved column

Abstract

The invention relates to a composite forging inner / outer same set process of small-medium size British system conical bearing sleeved columns, belonging to the technical field of the forging of British system conical bearing rings, and mainly solving the problems that a traditional British system conical ring forging process cannot realize the simultaneous production of an inner ring and an outer ring and the charging cost in the heterogenic set forging production is increased. The composite forging inner / outer same set process is characterized by comprising the following steps of: (1) heating a GCr15 steel charge segment with the weight of 0.320-1.200kg and the diameter of phi35-phi50 on a medium frequency induction furnace to 1050 DEG C, and then placing the heated charge segment on a pressure machine for upsetting, combined extrusion for forming, and sleeve separating to separate the heated charge segment into an outer bearing sleeve blank and an inner bearing sleeve blank; (2) carrying out ring rolling on the outer sleeve blank on a broking machine, and directly cooling or cooling into an outer bearing sleeve forged piece after finishing diameter on the pressure machine; and (3) placing the inner sleeve blank on the pressure machine for upsetting, extruding, and perforating, cooling and then forming a same set British system conical bearing inner sleeve forge piece. The invention is mainly applied to the manufacture of the forged piece of the same type of medium and small size British system conical bearing inner / outer rings.

Description

technical field [0001] The invention belongs to the technical field of forging an inch tapered bearing ring. Specifically, it relates to a manufacturing method which adopts a tower-set composite forging process and is suitable for simultaneous production of inner and outer rings of medium and small-sized inch tapered bearings. Background technique [0002] Medium and small imperial conical products are one of the main types of foreign trade export products developed in recent years. This type of product belongs to the light and thin series. There are bar stock cut outs. Moreover, the minimum size of the existing medium-frequency inductor for forging heating is φ50, and the minimum size of the heated material section is φ40. If such an inductor is directly used for heating, not only the kinetic energy consumption is huge, but also there are technical difficulties in feeding and pushing materials. So this type of forging cannot be produced separately under existing equipment...

AI Technical Summary

Problems solved by technology

Compared with the high-standard materials of foreign trade export products, this production method obviously increases the production cost and brings a lot of inconvenience to the balanced production.

More importantly, many defects of raw materials such as looseness and banded structure are generally distributed in the center of the bar, and are easy to stay on the daughter parts, which increases the quality risk of foreign trade export products

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