Blank rejector for forging machine

Details Blank rejector for forging machine Blank rejector for forging machine

1980-01-10

1982-03-02

Crane, Daniel C.

Metal deforming

With cutting

Severing a discrete piece from stock, work, or product

72 10, 72 14, 72361, 83 79, B21D 4500

Patent

active

043173543

ABSTRACT:
A forging machine is disclosed which is provided with means to determine when an undersized or short blank is produced by the shear and to provide for the automatic rejection of such blank. Such short blanks can occur if the stock feed into the shear is insufficient. The illustrated embodiment includes a shear for progressively cutting blanks from the forward end of a piece of stock in which the shear is provided with a load cell in the stock gauge to determine when improper feeding has occurred. Such load cell includes a strain gauge and the signal produced by the strain gauge actuates an overstroke ejection which pushes the blank from the first working station through the transfer fingers so that it does not transfer to a subsequent work station. The overstroke is provided by a piston and cylinder actuator mounted on the ejector lever which operates in response to a signal that the blank in the work station is of improper size.

REFERENCES:
patent: 2542864 (1951-02-01), Friedman
patent: 2689358 (1954-09-01), Deloe
patent: 3264853 (1966-08-01), Huber
patent: 3373584 (1968-03-01), Rundt et al.
patent: 3831411 (1974-08-01), Sakai et al.
patent: 3972211 (1976-08-01), Linthicum et al.
patent: 4084278 (1978-04-01), Allebach et al.
patent: 4202191 (1980-05-01), Skinner

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