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US 4,137,748 AGranted
Wedging structure for presses or the like
AssigneeThe National Machinery Company
InventorWalter J. Grombka
Life of this patent
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AssigneeThe National Machinery Company
InventorWalter J. Grombka
Estimating the term…
A wedge system is disclosed for adjustably positioning tools in a forging press or the like. The system includes a wedge positioned between two assemblies and provided with a locking taper. Hydraulic means permit lubricant to be supplied under pressure to the surface of the wedge so that the wedge is released and can float laterally when large loads are applied to the system, as for example during a tooling jam. Means are provided to prevent substantial separation between the interfaces of the wedge and the remainder of the system when hydraulic fluid is applied to prevent seal extrusion or blowout. The seals are arranged to prevent blowout or extrusion when the associated faces are separated a substantial amount. Further, a hydraulic actuator is provided to take up the load on the mechanical adjusting screws prior to release of the jam and to control the movement of the wedge once it is released.
A press or the like comprising a frame providing a die bed, a slide reciprocable in said frame toward and away from said die bed, a wedge system on said die bed operable to adjustably position stationary dies in said press, said wedge system including a laterally movable wedge formed with a locking taper, a plate member which is adjustable with respect to said die bed by movement of said wedge, seals along the face of said wedge operable to define a pressure zone along the interface of said wedge and the mating surfaces of said wedge system, hydraulic means operable to supply fluid under pressure to said zone with sufficient pressure to release said wedge for lateral movement even when said slide is jammed in its dead center position, mechanical stop means operable to positively limit movement of said plate under the influence of hydraulic pressure to prevent seal blowout or extrusion of said seals.
A wedge system or the like comprising a first and second plate assembly connected for movement in a first direction toward and away from each other, an inclined surface on one of said assemblies facing the other assembly, a wedge position between said inclined surface and said other assembly movable in a second direction substantially perpendicular to said first direction to permit movement of said assemblies in said one direction and to maintain them in an adjusted position, said wedge being formed with a locking taper whereby force applied to said asemblies in said first direction does not cause movement of said wedge in said second direction, seal means along the interface between said wedge and each of said assemblies operating to define a pressure zone at the interface of said wedge and each of said assemblies, hydraulic means to supply fluid under pressure to said zone to permit movement of said wedge in said second direction even when substantial forces are applied to said assemblies, and mechanical stop means operable to positively limit movement of said assemblies away from each other when fluid pressure is applied by said hydraulic means to prevent sufficient spacing to occur between said interfaces to cause seal blowout or extrusion.
Dependencies are inferred from the claim text.