US 4,138,913 AGranted

Punch press feeding apparatus

AssigneeVamco Machine & Tool, Inc.

InventorPatrick J. Gentile

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Abstract

An input shaft is drivingly connected to a crankshaft of a punch press for rotation at a preselected speed. A geared cam drive drivingly connects the input shaft to a driven feed roll so that continuous rotation of the input shaft is converted to intermittent rotation of the feed roll. The intermittent rotation of the feed roll is timed with the punching operation so that the feed roll intermittently advances a preselected length of stock material to the punch press after each punching operation. Bevel gears drivingly connect the input shaft to a pull roll that rotates to continuously unreel stock material from a coil. During the punching operation, rotation of the feed roll is interrupted forming a loop in the stock material between the pull roll and the feed roll. At the end of each punching operation the material forming the loop is fed by the feed roll to the punch press so that the stock material between the pull roll and the feed roll moves from a loop to a horizontal position to insure feeding the same length of material to the punch press for each cycle of operation.

Apparatus for the controlled feeding of stock material to a punching apparatus comprising,

pull means for continuously pulling the stock material from a source,
intermittent feed means for intermittently feeding a preselected length of the stock material to the punching apparatus,
an input shaft adapted to be drivingly connected to the punching apparatus for rotation at a continuous preselected speed,
said input shaft extending longitudinally parallel to the direction of feed from the punching apparatus to said intermittent feed means and therefrom to said pull means,
first means for drivingly connecting said input shaft to said intermittent feed means to convert continuous rotation of said input shaft to intermittent rotation of said intermittent feed means for intermittently feeding a preselected length of the stock material to the punching apparatus in timed relation with the punching operation,
second means for drivingly connecting said input shaft to said pull means to continuously rotate said pull means and continuously advance the stock material from the source to said intermittent feed means,
said pull means being operable to continuously feed the stock material to said intermittent feed means at a rate to form a loop in the stock material between said pull means and said intermittent feed means while the punching apparatus performs to punching operation and while said intermittent feed means interrupts the feed of the stock material to the punching apparatus to thereby store in said loop the amount of stock material fed to the punching apparatus for each cycle of operation of the punching apparatus, and
said intermittent feed means being operable to feed a preselected length of the stock material corresponding to the length of the stock material stored in the loop to the punching apparatus so that the stock material positioned between said pull means and said intermittent feed means moves from a looped position to a substantially horizontal position and all the stock material stored in said loop is fed to the punching apparatus and said loop is removed after the feeding operation.

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Abstract

Claims5