Motor-driven clamping method and device

Details Motor-driven clamping method and device Motor-driven clamping method and device

1979-07-09

1981-06-16

Nerbun, Peter P.

Tool driving or impacting

Processes

173 12, B25B 23147, B25B 2102

Patent

active

042731984

ABSTRACT:
A motor-driven clamping method characterized by a two-step control operation, in which when a torque applied to a member to be clamped reaches a first set value smaller than a reference set value, a drive motor is once decelerated and rapidly stopped; then the drive motor is re-started immediately and controlled so that the torque applied to the member to be clamped increases along a predetermined torque increasing characteristic; and when the torque applied to the member to be clamped reaches a second set value corresponding to the reference set value, the drive motor is braked to be rapidly stopped. A handy motor-driven clamping device of light weight can be prepared by embodying the above method.

REFERENCES:
patent: 3920088 (1975-11-01), Dudek
patent: 3926264 (1975-12-01), Bardwell et al.
patent: 4163310 (1979-08-01), Sigmund

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