Numerical control apparatus for stepped feeding at punch and nib

Details Numerical control apparatus for stepped feeding at punch and nib Numerical control apparatus for stepped feeding at punch and nib

1979-04-25

1981-06-09

Ruggiero, Joseph F.

Boots, shoes, and leggings

83 71, 83203, 83277, 83916, 318 39, 318603, G06F 1546, B26D 520, B23D 2700

Patent

active

042728126

ABSTRACT:
In a nibbling machine having a fixed tool, a punching tool reciprocated by crank mechanism including a crankshaft and means for feeding a workpiece step-by-step between the fixed tool and the punching tool, feeding movement of the workpiece is controlled by a computer so that the workpiece is stopped while engaged by the punching tool but a maximum period of time is provided during which the workpiece can be moved. A pulse generator connected with the crankshaft generates 1000 to 20,000 pulses per revolution. These pulses and also information as to the thickness of the workpiece are fed to the computer, which is programmed to block workpiece feed movement when the number of pulses after top dead center corresponds to a first angular position of the punching tool just clear of the workpiece and to resume workpiece feed movement when the number of additional pulses counted corresponds to a second angular position of the crankshaft in which the punching tool again just clears the workpiece after having engaged it.

REFERENCES:
patent: 3427518 (1969-02-01), Cloup
patent: 3614575 (1971-10-01), Cutler
patent: 3873899 (1975-03-01), Seo et al.
patent: 3919907 (1975-11-01), Kindgren
patent: 4024446 (1977-05-01), Burnett
patent: 4062213 (1977-12-01), Schneider et al.
patent: 4126068 (1978-11-01), Bromer

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