Cutting – With work immobilizer – Means to clamp work
Patent
1980-06-25
1981-12-22
Meister, James M.
Cutting
With work immobilizer
Means to clamp work
83488, 83590, 83629, 83794, 83799, 83801, B23D 4712, B24B 2706, B26D 726
Patent
active
043064787
ABSTRACT:
A severing machine including a feed device for cutting tool arranged to advance continuously to effect cutting of a workpiece, a machine stand with a workpiece supporting table and clamping jaws, and a machine head containing the tool movable relative to the table during cutting. The feed device controls the relative movement of the head in the feed direction and comprises: a ball roller spindle rotatably supported by the stand and provided with outer helical threads, the spindle having a length greater than the maximum feed displacement of the portion of the head in the region of the spindle; two spaced-apart axial bearings carried by the head; a freewheel coupling positioned between the axial bearings and composed of an inner race in threaded engagement with the spindle and having a thread pitch outside of the range of self-locking with the spindle thread, an outer race carried by, and rotatable freely relative to, the inner race, and a coupling mechanism coupling the races together in a manner to permit the outer race to rotate freely relative to the inner race in the direction of rotation of the inner race relative to the spindle during movement of the head in the feed direction, the outer race being driven in that direction of rotation at a rate which is a function of the tool advance; a braked drive motor connected for rotating the spindle; and a unit for adjusting the weight loading by the head on the freewheel coupling.
REFERENCES:
patent: 3991644 (1981-06-01), Sugimoto
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