Patent ID: 11904564
Assignee: PDINNOVATIVE LLC
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 19:
20. A method of operating a linear-actuated press machine for forming a part, the press machine comprises a first motor, a second motor, a linear actuator having a male-female thread mechanism with a rotatable screw and a nut that moves along the rotatable screw, a press ram holding a tool and being coupled to the linear actuator via an actuator rod, the actuator rod being coupled to the nut that moves along the rotatable screw, the method comprising:
(i) rotating, by use of the second motor, the rotatable screw of the linear actuator while maintaining the rotatable screw in a linearly stationary position, the rotating causing the nut to move along the rotatable screw and the press ram to advance toward the part in a low-force and high-linear-speed condition;
(ii) while advancing the press ram toward the part in the low-force and high-linear-speed condition of the second motor, partially or fully disengaging a clutch so as to reduce the rotational movement on the first motor; and
(iii) subsequent to acts (i) and (ii) and while the clutch is engaged to allow the linear actuator to be driven by the first motor, forming the part with the tool in a low-speed and high-force linear movement condition, the low-speed and high-force linear movement condition being produced by rotating the rotatable screw with the first motor while maintaining the rotatable screw in a linearly stationary position so that the nut moves along the rotatable screw.