Cutting – Tool engages work during dwell of intermittent workfeed – With variable direction of work-feed from cycle to cycle
Patent
1976-08-02
1978-05-16
Abercrombie, Willie G.
Cutting
Tool engages work during dwell of intermittent workfeed
With variable direction of work-feed from cycle to cycle
83237, 83241, 83364, 83916, B23D 2700, B26D 500
Patent
active
040892441
ABSTRACT:
A stamping or nibbling machine, comprises a workpiece support or means for engaging the workpiece at a spaced location from a punch which reciprocates upwardly and downwardly in respect to a die in order to effect the stamping or nibbling of the workpiece. The support is mounted on a transverse bar which is pivotable about a transverse guide and the guide is carried on a carriage which is pivotable about a longitudinal guide. The workpiece is fed by holding the bar and the carriage against pivotal movement and driving them in the respective longitudinal direction when the punch is lifted off the workpiece. The rate of this feed may be controlled in timed relationship to the movement of the punch so that the feed takes place when the punch is off the workpiece and in a speed of feed which is determined in accordance with the torque acting on the transverse bar and the carriage when they are released for pivotal movement and sensed by associated torque meters. In addition, the feeding control is also carried out in dependence upon the weight of the workpiece as measured, for example, by a measuring bolt at the location of the die. The stamping stroke of the punch can be released through a time-delay device which is controllable by the measuring device for determining the weight of the plate. The torque meters effect a measurement of the center of gravity of the workpiece at any time during its positioning in respect to the punch and the die.
REFERENCES:
patent: 3664217 (1972-05-01), Schiewek
patent: 3771613 (1973-11-01), Forster et al.
Bitzel Hubert
Herb Eugen
Abercrombie Willie G.
Trumpf Maschinen AG
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