Patent ID: 7083500

Claim:
A method for grinding a workpiece which is rotationally symmetrical about a workpiece axis and has a longitudinal bore and first and second end sides axially opposing each other, said first end side having a substantially conical surface to be ground which is truncated and has a meridian cross-section having a substantially straight contour along the said substantially conical surface, comprising: chucking said workpiece at said second end side to place the workpiece into a chucked state without chucking said workpiece at said first end side; rotating said workpiece in said chucked state about a workpiece; providing a first grinding wheel on a pivoting grinding headstock, said first grinding wheel having first and second annular side surfaces, and an outer grinding wheel surface between said first and second annular side surfaces; said outer grinding wheel surface being defined by a substantially straight line contour extending in an axial direction and parallel to an axis of said first grinding wheel, an axial length of said outer grinding wheel surface of said first grinding wheel extending over an entirety of said substantially conical surface; providing a second grinding wheel on said pivoting grinding headstock, said second grinding wheel having a smaller diameter than a diameter of said first grinding wheel; positioning said first grinding wheel with said axis of said first grinding wheel aligned parallel to said substantially conical surface and said outer grinding wheel surface aligned along a direction of said workpiece axis with said substantially conical surface of said workpiece in said chucked state such that a projection of said outer grinding wheel surface in a direction of said workpiece axis completely covers said substantially conical surface; grinding said substantially conical surface with said outer grinding wheel surface such that said grinding is done with said workpiece in said chucked state by relatively displacing said workpiece and said first grinding wheel along said direction of said workpiece; positioning said second grinding wheel into said longitudinal bore of said workpiece by pivoting on said pivoting grinding headstock; and grinding said interior wall with said workpiece in said chucked state by displacing said second grinding wheel and an interior wall of said longitudinal bore relative to one another; wherein said workpiece remains in said chucked state from a time prior to said grinding of said interior wall and said substantially conical surfaces until said grinding of said interior wall and said substantially conical surface is completed.