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AssigneeErwin Junker Maschinenfabrik GmbH
InventorErwin Junker
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A steady rest for supporting, e.g., bearing points on shaft parts of crankshafts, during the grinding of central and/or eccentric workpiece regions. For the grinding, the steady rest is brought from a retracted position to a supporting position against the workpiece region to support the workpiece region at respective circumferential regions. The supporting parts are each arranged on a lateral flank of a prism opening in a fork-like manner on a steady-rest arm in a fixed position in relation to each other and to the steady-rest arm, the supporting parts thus forming an opening angle to each other. The supporting parts are arranged below center with respect to the longitudinal axis of the workpiece region such that an angle bisector between the two supporting parts has a fixed acute angle to the vertical extending through the longitudinal axis of the workpiece region and the CNC-controlled advancement occurs along said angle bisector. The invention relates to a grinding machine, which has a steady rest described above.
Steady rest for—under operating conditions—supporting central workpiece regions, in particular bearing points on shaft parts, in particular crankshafts, during the machining of central and/or eccentric workpiece regions, which is brought to the workpiece from a retracted to a supporting position so as to grind the workpiece and has at least two supporting parts that can be advanced to the workpiece region at respectively separated peripheral regions, with the workpiece along with its workpiece region being held in the supporting position, characterized in that the supporting parts are disposed so as to form an opening angle with respect to each other at each lateral flank of a prism that opens in a fork-like manner at a steady rest arm, in a fixed position with respect to one another and with respect to the steady rest arm and in the supporting position sub-centric to the longitudinal axis of the workpiece region, that a bisector formed between both supporting parts manifests a fixed acute angle with respect to the perpendicular running through the longitudinal axis of the workpiece region and that a CNC-controlled infeed to the workpiece region takes place along this bisector.
-7. (canceled)
Grinding machine for grinding central and/or eccentric workpiece regions on workpieces, in particular bearing points of crankshafts, with a steady rest for supporting the center workpiece regions, which steady rest can be advanced to the workpiece region from a retracted to a supporting position for grinding the workpiece and has at least two supporting parts that can be forwarded to a workpiece region, which supports the workpiece region at respective circumferential regions that are separated from each other, with the workpiece along with its workpiece region being supported in the supporting position, and with a control device by means of which the steady rest can be forwarded to a central workpiece region during or after the grinding of a workpiece region by means of a grinding wheel and the grinding wheel can be forwarded up to the final dimension of the bearing point, characterized in that the supporting parts of the steady rest forming an opening angle with respect to each other at each lateral flank of a prism forming a fork and having two shanks are disposed in the grinding machine in a fixed position with respect to each other on a steady rest arm and in the supporting position sub-central to the longitudinal axis of the of the workpiece region, that a bisector formed between the supporting parts has a fixed acute angle with respect to the perpendicular to the longitudinal axis of the workpiece region and that the steady rest has formed a CNC feed axis by means of which it can be forwarded along a bisector to the workpiece region in a CNC-controlled manner.
Dependencies are inferred from the claim text.