Clamping jaws and clamping device for clamping workpieces
AssigneeHainbuch GmbH Spannende Technik
InventorHans-Michael Weller
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Abstract
The invention relates to a clamping device (11) comprising clamping jaws (13) in which a plurality of clamping rods (16) are disposed. The clamping rods (16) are enabled to move by means of an interlinked system of rod chambers (22) and channels (24, 28) in which a magnetorheological fluid (26) is contained. If a magnetic field is applied by means of a magnet (30), the fluid solidifies, the liquid-carrying connection between the rod chambers (22) is interrupted and the rods (16) are fixed in a defined position.
Claims24
Clamping jaw for a clamping device for clamping a workpiece, said clamping jaw having a body and a clamping side to be applied to said workpiece to be clamped, said clamping side being formed by at least one clamping rod displaceable relative to said body in a rod guide and being applicable to a contour of said workpiece, said clamping rod being releasably and displaceably lockable by means of a locking device, said clamping jaw having a working fluid flowing from a rod chamber through a channel to a further rod chamber, said further rod chamber having a volume-variability through clamping rod movement, said volume-variability being limited by constricting or blocking said channel for locking said clamping rod, wherein said working fluid is a magnetorheological fluid and said locking device has a magnetic field production means with a magnetic action area including said channel.
Clamping jaw according to claim 22, wherein least two said permanent magnets are provided and are positioned so that resulting magnetic field is either cancelled out or strengthened by movement or displacement against one another.
Clamping jaw according to claim 22, wherein a movable arrangement is provided with at least one said permanent magnet and a movable soft iron core, wherein in a locking position magnetic field lines of said permanent magnet pass through a closed magnet yoke structure and said channel and wherein in an open position said magnetic field lines are short-circuited by a said soft iron core without a magnetic field in said channel.
Clamping jaw according to 1, wherein said intercommunicating, fluid-conducting system of said rod chambers and said channels is sealed to an outside and its overall volume is invariable.
Dependencies are inferred from the claim text.