Apparatus and method for forming a ball of relatively small diam

Details Apparatus and method for forming a ball of relatively small diam Apparatus and method for forming a ball of relatively small diam

1995-06-21

1997-08-26

Crane, Daniel C.

Metal deforming

With cutting

By shearing tool-couple

72339, 72361, 72294, 83150, 83694, B21D 4328, B21H 114

Patent

active

056600739

ABSTRACT:
An apparatus and method for forming a ball of relatively small diameter from metal wire includes a cutoff bar and a slide mechanism for shearing a length of metal wire from the remainder thereof at a first station to provide a blank with which a ball is subsequently formed and for transporting the blank to a second station and also includes a specially-designed punch assembly for forming the blank into a ball at the second station. The punch assembly includes a main slide body and a blank-engaging plunger assembly slidably mounted on the main slide body for sliding movement therealong wherein the plunger which is biased, by air pressure, from a retracted position to an extended position relative to the main slide body. As the plunger assembly is advanced toward the blank at the second station, the air-biased plunger assembly halts momentarily upon engagement with the blank, and it is during this momentary halt in the advancement of the plunger assembly that the cutoff bar and slide mechanism are begun to be moved away from the work axis to out-of-the-way positions accommodating the subsequent pressing of the blank into a ball by the punch assembly without interference from the cutoff bar and slide mechanism.

REFERENCES:
patent: 1573487 (1926-02-01), Gorman
patent: 1857997 (1932-05-01), Brennan
patent: 1897359 (1933-02-01), Brennan
patent: 2132853 (1938-10-01), Kearney
patent: 2800814 (1957-07-01), Lewis
patent: 4023393 (1977-05-01), Messerschmidt
patent: 4044588 (1977-08-01), Haines
patent: 4505144 (1985-03-01), Sakuma

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