Steady rest

摘要

A steady rest for centering a rotationally symmetrical workpiece in a housing, a guide slide axially adjustable in the housing, an actuator rod in a form-locking connection with the guide slide, and two control surfaces opposite one-another on the guide slide and configured so that the guide slide has a triangular cross-sectional contour, one tip pointing towards the workpiece and the opposite two tips point in toward the actuator rod, a middle steady rest arm in driving connection with the actuator rod, and two outer steady rest arms each on a side next to the middle steady rest arm, and mounted in a swivelling arrangement in the housing, the first free end of which is in contact with a control surface of the guide slide, the second free end gripping the workpiece, forming a three-point mounting with the middle steady rest arm adapted to hold the workpiece.

主权项

1. A steady rest (1) for centering a rotationally symmetrical workpiece (12) in a space defined by a housing shell (2) and a housing cover (3) firmly connected together to form an interior space (4), the steady rest comprising:
a guide slide (7) mounted in an axially adjustable arrangement in the interior space (4) and an actuator rod (5) connected to the guide slide (7); two control surfaces (8) formed facing opposite to one another on said guide slide (7), the control surfaces (8) being configured such that said guide slide (7) exhibits a triangular cross-sectional contour, one triangle tip of which points towards the workpiece (12) and two triangle tips point towards said actuator rod (5); a middle steady rest arm (6) in a driving connection with said actuator rod (5); and two outer steady rest arms (9, 10) each arranged on a side adjacent said middle steady rest arm (6) and mounted in a swivelling arrangement in the housing shell (2) and the housing cover (3), and a first free end (11) of which is in contact with said control surface (8) of said guide slide (7), the second free end (13) on the opposite side of said rest arm gripping around the workpiece (12) to be clamped, thus forming a three-point mounting together with said middle steady rest arm (6) in order to hold the workpiece (12), wherein said actuator rod (5) is provided with a passage opening (14) extending therethrough, into which a force actuation element (15) is disposed, and the force actuation element (15) is in a form-locking active connection with a first and/or second adjustment device (31 and/or 32) by means of intermediate elements (16, 17, 20, 30, 35) such that when the workpiece (12) is clamped, the first adjustment device (31) is adapted to adjust said three steady rest arms (6, 9, 10) jointly and synchronously to one another in position for aligning the workpiece (12) in the clamped condition in the horizontal plane and the second adjustment device (32) is adapted to adjust the position of the two outer steady rest arms (9, 10) for changing the position of the workpiece (12) in the clamped condition in the vertical plane.