Work holders – Holder mounted for movement – With plural means for changing holder positions
Patent
1979-10-10
1981-10-13
Watson, Robert C.
Work holders
Holder mounted for movement
With plural means for changing holder positions
B23Q 104
Patent
active
042944406
ABSTRACT:
To enable heavy workpieces to be orientated into any desired position without re-clamping, more particularly for welding seams horizontally from above, as is most favorable, a clamping plate or table (3) is pivoted for unrestricted rotation about an axis (5) at the free end of a cantilever arm (2) supported from a stand (1) for rotation about a horizontal axis (13) by flange elements (14, 15) which are adjustable with respect to one another in two directions at right angles to balance a workpiece and the cantilever, table assembly with reference to the axis (13). Electric motor drives (7 and 12) controlled by limit switches may be used to selectively rotate the table and the cantilever arm to bring a workpiece into any desired orientation. A construction in which the cantilever (2) is replaced by a beam extending two end frames like the stand (1) is also described.
REFERENCES:
patent: 2782661 (1957-02-01), Lewis
patent: 3218056 (1965-11-01), Kaplan et al.
patent: 4067562 (1978-01-01), Weber
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