Severing by tearing or breaking – Breaking or tearing apparatus – Combined with preliminary weakener or with nonbreaking cutter
Patent
1977-01-11
1978-09-05
Meister, J. M.
Severing by tearing or breaking
Breaking or tearing apparatus
Combined with preliminary weakener or with nonbreaking cutter
82 59, 82 70, B26F 300, B26D 308, B26D 316, B23B 514
Patent
active
041113462
ABSTRACT:
A tube cutting machine has a cutting station and an intermittently operable feed means comprising an air cylinder operating a feed clamp assembly. The cylinder and clamp assembly axially advance an elongated section of tubing to present trailing end portions of leading end tube sections at the cutting station. A cutting clamp assembly securely holds the tube rearwardly of each trailing end portion for the cutting operation. A centrally apertured rotary cutting head has three radially movable rotary cutters or rollers which effect a partial cut at each trailing end portion. The cutting head and its operating means include positive mechanical actuating means for the small rotary cutters or rollers and an adjustable means is provided for precisely limiting inward cutter or roller movement in accordance with tube diameter and wall thickness. The adjustable means comprises an adjustably mounted limit switch which terminates operation of an air cylinder which in turn effects a drive belt deflection resulting in an angular displacement of a cutter actuator pulley relative to a head driving pulley. With a circumferentially uniform partial cut of controlled depth, a subsequent break-off operation effects a clean break with minimal ID reduction. Break off means comprise a quill and an air cylinder and, alternatively, a hinged break off supporting cylinder swingably operated by an air cylinder.
REFERENCES:
patent: 1585896 (1926-05-01), Danner
patent: 3268137 (1966-08-01), Martin
patent: 3515326 (1970-06-01), Saito et al.
patent: 3656219 (1972-04-01), Connelly
patent: 3659764 (1972-05-01), Janizewski
patent: 3739666 (1973-06-01), Wright et al.
patent: 3877625 (1975-04-01), Brock
Bertolette Machines, Inc.
Meister J. M.
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