Method of producing improved serrated flats used in the manufact

Details Method of producing improved serrated flats used in the manufact Method of producing improved serrated flats used in the manufact

1980-08-26

1982-07-13

Larson, Lowell A.

Metal deforming

By use of 'flying tool' engaging moving work

Included in plural deforming stations or passes

72197, B21H 700

Patent

active

043388078

ABSTRACT:
Billets of hot steel are hot rolled through a series of rolling stands to form an elongated flat. This flat is first worked to a predetermined thickness and width and then subjected to an edging pass at a succeeding stand. The edging pass is comprised of a pair of rolls having spaced apart, aligned grooves to receive the flats. The groove in one of the rolls is provided with a plurality of holes having certain characteristics. The depths of the roll grooves, the distance they are spaced apart, the depth and other characteristics of the holes provided in the one grooved roll and the widths of the roll grooves are all adjusted with respect to the predetermined dimensions of the flats entering the edging pass so that desired serrations are imparted to the flat as it passes through the edging pass. A final flat pass may be utilized to finalize the dimensions of the finished, serrated flat. The holes are cut into the roll groove by electric discharge machining. Care is given to the control of the shape of the flat before and after it enters the edging pass. The serrations, however, are imparted to the flat as it passes through the edging pass.

REFERENCES:
patent: 3653245 (1972-04-01), Tishken
patent: 3996780 (1976-12-01), German
patent: 4041750 (1977-08-01), Moore

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