Method of and machine for grinding internal threads
AssigneeSchaudt Maschinenbau GmbH
InventorHeinz Belthle
Life of this patent
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Abstract
The internal thread of a rotary workpiece, especially a ball thread, is ground with a CBN grinding wheel whose axis makes with the axis of the workpiece a grinding angle smaller than the lead angle of the thread to be ground. The profile of the grinding wheel is thereupon corrected by a diamond profiling roll whose axis makes with the axes of the grinding wheel an angle larger than the lead angle.
Claims3
A method of grinding an internal thread having a predetermined lead angle, especially a ball thread, in a rotary workpiece by means of a grinding wheel which is mounted on a rotary grinding spindle, comprising the steps of introducing the grinding wheel into the workpiece and maintaining the axes of the grinding spindle and the workpiece at a predetermined grinding angle smaller than the lead angle;
- and thereupon dressing the grinding wheel including correcting the profile of the grinding wheel, said correcting step comprising contacting the grinding wheel with a rotary diamond profiling tool including maintaining the axes of the profiling tool and grinding wheel at a predetermined dressing angle greater than the lead angle of the internal thread.
Dependencies are inferred from the claim text.