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

Claim 10:
11. A linear-actuated press machine for forming a part, comprising:
a moveable press ram for holding a tool that forms the part;
an actuator including an actuator rod, at least one actuator sprocket, and a male-female thread mechanism, the male-female thread mechanism including a rotatable screw that remains linearly stationary and a nut that translates vertically along the rotatable screw, the actuator rod being coupled to the nut, the actuator rod producing a linear movement of the moveable press ram, the at least one actuator sprocket for driving the rotatable screw;
a first motor drive system for producing a low-speed high-force linear movement to the moveable press ram via the actuator, the low-speed high-force linear movement causing greater than 100 tons of force to be delivered by the tool to the part, the first motor drive system including a first motor for directly driving a first motor sprocket, a bi-directional clutch, and a first belt system coupling the first motor sprocket to the at least one actuator sprocket;
a second motor drive system for producing a high-speed low-force linear movement to the moveable press ram via the actuator, the second motor drive system including a second motor for directly driving a second motor sprocket and a second belt system coupling the at least one actuator sprocket to the second motor sprocket; and
wherein, in response to the high-speed low-force linear movement of the second motor drive system for advancing the press ram toward the part or for retracting the press ram from the part after the part has been formed, (i) the at least one actuator sprocket rotates at a high rotational speed, and (ii) the bi-directional clutch at least partially disengages the first motor to maintain a rotational speed of the first motor below a limit to reduce possible damage to the first motor;
wherein, in response to the low-speed high-force linear movement of the first motor system to form the part, the bi-directional clutch is operationally engaged to transfer torque from the first motor to the at least one actuator sprocket of the linear actuator via the first belt system.