Method for controlling proper clamping of a workpiece in a clamp

Details Method for controlling proper clamping of a workpiece in a clamp Method for controlling proper clamping of a workpiece in a clamp

1977-04-25

1978-03-28

Mehr, Milton S.

Metal working

Method of mechanical manufacture

Work holding

279 4, 269 20, B23Q 308

Patent

active

040807169

ABSTRACT:
A method for controlling proper clamping of a workpiece in a clamping device, the clamping jaws of which are moved to a clamping position by movement of a piston of hydraulically operated cylinder-and-piston means in a clamping direction, in which a control signal is produced indicating proper clamping of the workpiece when sensing means cooperating with the piston indicate that the latter, during its movement in clamping direction, has reached at least a first position but not reached a second position spaced in clamping direction from the first position, while at the same time a predetermined pressure acting in clamping direction on the piston is indicated.

REFERENCES:
patent: 2542318 (1951-02-01), Faverty et al.
patent: 3814449 (1974-06-01), Buck
patent: 3924514 (1975-12-01), Parsons et al.

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