Steady rest
AssigneeSMW-Autoblok Spannsysteme GmbH
InventorEckhard Maurer
Life of this patent
Estimating the term…
Abstract
A steady rest (1) for centering a rotationally symmetrical workpiece (2) in relation to a longitudinal axis of a processing machine, having, two housing shells (4, 5) separated by a distance from one another and connected together, an actuating piston (7) mounted in an axially moving arrangement in the housing shells (4, 5) which acts on the workpiece (2), three steady rest arms (8, 9, 10) mounted to the two housing shells (4, 5) in a swiveling arrangement by a bearing pin, and configured to move in concert so as to clamp the workpiece, wherein the clamping forces actually occurring on the steady rest arms (8, 9, 10) can be registered reliably using a force measuring device (21) provided on at least one of the two steady rest arms (8, 9), and passed onto an evaluation device (22).
Claims13
A steady rest for centering a rotationally symmetrical workpiece in relation to a longitudinal axis of a processing machine, consisting of:
- two housing shells separated by a distance from one another and connected together;
- an actuating piston mounted in an axially moving arrangement in the housing shells for generating a clamping force which acts on the workpiece;
- three steady rest arms mounted to the two housing shells, wherein at least two of the steady rest arms are each mounted to the two housing shells in a swiveling arrangement by a bearing pin, and configured to move in concert so as to clamp;
- characterized in that, a force measuring device is provided on at least one of the two steady rest arms, by means of which the clamping force of the particular steady rest arm is registered during the clamped condition and passed onto an evaluation device;
- wherein the force measuring device consists of (i) at least one of the bearing pins that is configured as a force measuring shaft about which the particular steady rest arm is swiveled within a predefined angle range, and (ii) at least one strain gauge assigned to the force measuring shaft.
A steady rest for centering a rotationally symmetrical workpiece in relation to a longitudinal axis of a processing machine, consisting of:
- two housing shells separated by a distance from one another and connected together;
- an actuating piston mounted in an axially moving arrangement in the housing shells for generating a clamping force which acts on the workpiece;
- three steady rest arms mounted to the two housing shells, wherein at least two of the steady rest arms are each mounted to the two housing shells in a swiveling arrangement by a bearing pin, and configured to move in concert so as to clamp the workpiece;
- characterized in that, a force measuring device is provided on at least one of the two steady rest arms, by means of which the clamping force of the particular steady rest arm is registered during the clamped condition and passed onto an evaluation device;
- wherein at least one of the steady rest arms comprises a roller mounted to the at least one steady rest arm by a roller bearing shaft, the roller being configured to contact the workpiece, and further wherein the roller bearing shaft of the roller is configured as the force measuring device;
- and
- wherein the roller bearing shaft is configured as a force measuring shaft with at least one circumferential groove worked into it, and that at least one strain gauge is arranged in the at least one circumferential groove and is connected to the evaluation device by means of electrical cables.
A steady rest for centering a rotationally symmetrical workpiece in relation to a longitudinal axis of a processing machine, consisting of:
- two housing shells separated by a distance from one another and connected together;
- an actuating piston mounted in an axially moving arrangement in the housing shells for generating a clamping force which acts on the workpiece;
- three steady rest arms mounted to the two housing shells, wherein at least two of the steady rest arms are each mounted to the two housing shells in a swiveling arrangement by a bearing pin, and configured to move in concert so as to clamp the workpiece;
- characterized in that, a force measuring device is provided on at least one of the two outer steady rest arms, by means of which the clamping force of the particular outer steady rest arm is registered during the clamped condition and passed onto an evaluation device;
- wherein at least one strain gauge is arranged on one of the steady rest arms and is connected to the evaluation device by means of electrical cables, and that the at least one strain gauge is arranged on the outside of the steady rest arm.
Dependencies are inferred from the claim text.