Force multiplying press

A press for performing a work operation on a workpiece, said press comprising:

• a frame defining a bore having an axis;
• a ram slidably mounted in said bore for movement along said axis and having a first end positioned within said bore and a free end;
• a first fabricating tool mounted on said ram free end;
• an electric motor including an output shaft rotated in response to actuation of said motor;
• a drive member movable along an axis parallel to said bore axis through power and return strokes in response to rotation of said output shaft;
• and
• a force multiplying linkage system interconnecting said drive member and said ram and operative in response to forward power stroking movement of said drive member to move said fabricating tool forwardly to a preparatory position thereafter to multiply the force applied to said tool to facilitate the performance of the work operation.

A press for performing a work operation on a workpiece, said press comprising:

• (A) a yoke defining a bore open at one end and closed at its other end by an end wall of said yoke;
• (B) a ram slidably mounted in said bore with a first end positioned within said bore and a second free end projecting out of said bore;
• (C) a fabricating tool mounted on the free end of said ram;
• (D) an electric motor mounted exteriorly of said yoke and including an output shaft extending through said end wall and into said bore;
• (E) a screw driven by said output shaft;
• (F) a nut mounted on said screw and movable through power and return strokes in response to powering of said output shaft upon actuation of said motor;
• and
• (G) a force multiplying mechanism interconnecting said nut and said ram and operative in response to power stroking movement of said nut to move said fabricating tool to a preparatory position and thereafter multiply the force supplied to said fabricating tool to facilitate and performance of the work operation.

A press performing a work operation comprising:

• a fabricating tool;
• a motor having a rotatable output shaft;
• a force multiplying mechanism drivingly connected to said tool and including a rest position corresponding to a rest position of said tool, a preparatory position corresponding to a preparatory position of said tool, and a force multiplying position corresponding to a final position of said tool in which the work operation has been completed;
• drive means interconnected between said output shaft and said force multiplying means and operative in response to rotation of said output shaft to move said force multiplying mechanism from its rest position to its preparatory position and thereafter to its final position;
• and
• control means operative to initially energize said motor in a high speed sense to move said force multiplying mechanism rapidly from its rest position to its preparatory position and thereby move said tool form its rest position to its preparatory position and thereafter energize said motor in a slow speed sense to move said force multiplying mechanism to its force multiplying position and thereby move said tool to its final position.

A press for performing a work operation comprising:

• a fabricating tool;
• an electric motor having a rotatable output shaft;
• a force multiplying mechanism drivingly connected to said tool and including a rest position corresponding to a rest position of said tool, a preparatory position corresponding to a preparatory position of said tool, and a force multiplying position corresponding to a final position of said tool in which the work operation has been completed;
• drive means interconnected between said output shaft and said force multiplying means and operative in response to rotation of said output shaft to move said force multiplying mechanism from its rest position to tis preparatory position and thereafter to its final position;
• and
• control means operative to selectively control the rotation of said output shaft so as to selectively control the movement of said force multiplying mechanism from its rest position to its preparatory position to its final position;
• said press further including a frame defining a bore and a ram slidably mounted in said bore and having a first end positioned within said bore and a free end;
• said drive means including a screw drivingly connected to the output shaft of said electric motor and a nut mounted on said screw and movable through power and return strokes in response to energization of said motor;
• said tool being carried on said ram free end;
• said ram and said nut being mounted for movement on parallel axes so that forward stroking movement of said nut produces forward stroking movement of said ram;
• and
• said force multiplying mechanism being interconnected between said nut and said ram and comprising a linkage system including a first link connected at one at one end thereof to a connection point on said ram and movable in response to forward stroking movement of said ram from a preparatory position in which the other end thereof is displaced from a line of action parallel to said axes and passing through said connection point to a final position in which said other end thereof is proximate said line of action.