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US 11,000,931 B2Granted
Grinding machine
AssigneeMahle International GmbH
InventorsMichael Hettler, Roland Schacherer
Life of this patent
Estimating the term…
Abstract
A grinding machine for external cylindrical grinding of hollow shafts may include at least one grinding disc, at least one support disc, and at least two centrings for a face-side fixing of a hollow shaft. At least one of the at least two centrings may be configured as a point. A ruler may be arranged to adjust and hold a position of the hollow shaft during a grinding operation. A rotation axis of the at least one grinding disc and of the at least one support disc may be arranged parallel to one another and define a plane. A rotation axis of the hollow shaft to be ground may extend outside of the plane by a distance of a>12 mm.
Claims18
A grinding machine for an external cylindrical grinding of hollow shafts, comprising:
- at least one grinding disc with a circumferential grinding surface having a grinding disc rotation axis;
- at least one support disc having a support disc rotation axis;
- at least two centrings defining a shaft rotation axis and disposed axially opposite to one another with respect to the shaft rotation axis for a face-side fixing of a hollow shaft, the at least two centrings including a centring point and a centring stopper;
- wherein the centring point has a pointed axial contact face and the centring stopper has a flat axial contact face disposed axially opposite to the pointed axial contact face along the shaft rotation axis for the face-side fixing of the hollow shaft, the flat axial contact face of the centring stopper extending perpendicularly to the shaft rotation axis for axially engaging against a respective face side of the hollow shaft;
- a ruler structured and arranged to adjust a position of the hollow shaft and support the hollow shaft in a grinding position;
- wherein the grinding disc rotation axis and the support disc rotation axis are arranged parallel to one another and define a plane, wherein the shaft rotation axis for the hollow shaft in the grinding position is disposed outside of the plane by a distance of a>12 mm;
- wherein the centring point includes an axially projecting carrier disposed on the centring point radially offset from the pointed axial contact face to facilitate transmission of a rotational drive of the hollow shaft, and a further stopper is arranged at the centring point coaxially to the shaft rotation axis, the further stopper structured and arranged to engage into an inner diameter of the hollow shaft with a first axial end;
- and
- wherein the pointed axial contact face of the centring point engages with a second axial end of the further stopper along the shaft rotation axis and the axially projecting carrier cooperates in a form-fitting manner with a radial region of the second axial end of the further stopper.
6 more elements
A method for an external cylindrical grinding of hollow shafts, comprising:
- fixing a hollow shaft having a shaft rotation axis on axially opposite face sides of the hollow shaft between a point and a centring stopper, wherein the point engages into a further stopper joined with the hollow shaft, the further stopper having a first axial end joined with the hollow shaft and a second axial end engaged with the point, the centring stopper having a first section and a second section defining an outer diameter less than that of the first section, and wherein fixing the hollow shaft includes inserting the second section of the centring stopper into an interior of the hollow shaft such that the outer diameter of the second section radially engages an inner diameter of the hollow shaft;
- delivering at least one grinding disc having a circumferential grinding surface and at least one support disc to the hollow shaft to be ground;
- holding the hollow shaft between the point and the centring stopper during a grinding process while supporting the hollow shaft via a ruler in a grinding position where the shaft rotation axis is arranged at a distance of a>12 mm outside of a plane defined by a rotation axis of the at least one grinding disc and a rotation axis of the at least one support disc;
- rotatably driving the hollow shaft via the point during the grinding process by transmitting torque to the hollow shaft via an axially projecting carrier disposed on the point radially offset from the shaft rotation axis, wherein the axially projecting carrier cooperates in at least one of form-fitting and force-fitting manner with a radial region of the second axial end of the further stopper arranged on the hollow shaft;
- and
- wherein inserting the second section of the centring stopper into the interior of the hollow shaft includes pressing a flat axial contact face of the centring stopper defined between the first section and the second section against a respective one of the face sides of the hollow shaft, the flat axial contact face extending perpendicularly to the shaft rotation axis to facilitate axially engaging against the respective one of the face sides for a face-side fixing of the hollow shaft.
3 more elements
Dependencies are inferred from the claim text.