Metal deforming – With means to drive tool – Including cam-actuated support
Patent
1995-06-23
1998-04-07
Jones, David
Metal deforming
With means to drive tool
Including cam-actuated support
72347, 72456, B21J 919, B21J 1304
Patent
active
057351651
ABSTRACT:
A mechanical bodymaker drive system for an under drive type vertical punch including a scotch yoke mechanism utilized to drive the punch. Two counterrotating cranks with counterweights are geared together to balance inertial forces on the scotch yoke driven slide. The scotch yoke mechanism, employing a slider block and slide, eliminates second harmonic inertia forces acting on the machine and allows counterrotating counterweights to totally balance inertia forces throughout the stroke. The punch is additionally hydrostatically attached to the scotch yoke mechanisms to compensate for deflections and thermal stress during operation. The hydrostatic pads eliminates the clearance between the face of the punch and the scotch yoke yet permits small lateral movements.
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Lavy Roderick A.
Schockman Robert L.
Jones David
Knuth Randall J.
The Minster Machine Company
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