Cold ring rolling forming method for double-flute section ring

Abstract

The invention relates to a cold ring rolling forming method for a double-flute section ring. The method comprises the following implementation steps of: (1) preforming, namely uniformly heating a bar section to the forging temperature from room temperature; upsetting, punching and punching wad to form a ring roughcast used for ring rolling; and designing the size of the ring roughcast; (2) roll pass design; and (3) ring rolling forming by using a ring rolling machine, wherein a core roll stops feeding and a ring rolling process is finished when the outside diameter of an obtained double-flute section ring is measured to reach a predetermined value; and the ring roughcast finally forms the double-flute section ring in a predetermined size. In the method, the double-flute section ring is produced by adopting a cold ring rolling process; the double-flute section ring is formed through continuous local plastic deformation of a rectangular section ring by reasonably designing the ring roughcast, ring rolling pass and forming parameters; and therefore, the consumption of raw materials and processing time are reduced, metal streamline distribution and organization properties of the ring are improved, work efficiency and product quality are improved, and production cost is reduced.

Description

technical field [0001] The invention relates to a method for cold rolling and forming, in particular to a method for cold rolling and forming of a double-groove section ring. Background technique [0002] Double-groove cross-section rings are mainly used as inner and outer rings of double-groove ball bearings, and are widely used in industrial fields such as mechanical equipment and auto parts. The double-groove cross-section ring not only requires high dimensional accuracy, but also requires a long service life, and the key to these technical indicators lies in the processing technology of the double-groove cross-section ring. At present, rings with double-groove cross-section are usually processed by combined forging and machining, that is, the rectangular cross-section ring is processed by forging and reaming, and then the groove is processed by machining. The processing process is as follows: 1) blanking, 2) pier thickening, 3) punch hole expansion, 4) flat end face, 5)...

AI Technical Summary

Problems solved by technology

[0003] The problem to be solved by the present invention is to propose a method of cold rolling and expanding double-groove cross-section rings with high production efficiency, low cost and good product quality in view of the above-mentioned prior art. This method forms a rectangular cross-section blank through continuous local plastic deformation. It is a double-groove cross-section ring, which avoids groove cutting defects, effectively improves production efficiency and product quality, and reduces production costs

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