Cutting – Tool engages work during dwell of intermittent workfeed – Unicyclic
Patent
1976-02-26
1977-01-04
Yost, Frank T.
Cutting
Tool engages work during dwell of intermittent workfeed
Unicyclic
83 54, 83209, 83221, 83236, 83278, 83283, 83367, 83484, 83488, B26D 520
Patent
active
040006727
ABSTRACT:
A slitting machine is disclosed which feeds corrugated pipe through the machine intermittently and between the periods of pipe feeding when the pipe is stationary a plurality of angularly spaced saw sets are moved radially inward toward the machine axis and the pipe to cut slots through the wall thereof, and then withdrawn whereupon the cycle repeats. The pipe is fed through the machine by endless transporters equal in number to the saw sets and uniformly disposed angularly with respect to each other, the saw sets and the axis. The transporters have projections which fit into the corrugations of the pipe for a driving connection therewith. A saw set is located angularly between each pair of transporters so that a pair of the latter are roughly opposite to a saw set for an even number of sets or directly opposite a transporter for an odd number of sets. This arrangement backs up the pipe when it is being cut so that the number of saws in each set or gang can be increased and thereby increase the length of pipe which can be slitted for each cycle and increase the number of feet per minute of pipe which can be cut. For a machine having an even number of saw sets, half are driven in one direction of rotation and half in the other direction in order to eliminate torque on the pipe when cutting. For a machine having an odd number of saw sets there will be one more set of saws rotating in one direction than in the other direction to reduce the torque on the pipe when cutting. Control means are provided to set each operation into motion and preferably automatically and to assure also that each operation is completed before the other is initiated.
REFERENCES:
patent: 3831470 (1974-08-01), Maroschak
Sitterer Theodor K.
Valentin Siegfried
Altair National Corporation
Montstream John M.
Yost Frank T.
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