Process for avoiding overstressing a workpiece during grinding
AssigneeZF Friedrichshafen AG
InventorsRobert Gugenheimer, Johannes Reilhofer, Werner Binsmaier
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Abstract
A process is proposed for recognizing thermal overstressing of a workpiece during grinding (overheating) by way of a grinding arrangement with a grinding spindle and a driving machine, the speed of rotation of the grinding spindle is measured, the measured value is supplied to a data processing device, a measure of the kinetic energy of the grinding spindle is derived therefrom and this measure is compared with a reference value characteristic of overheating.
Claims16
A process for avoiding thermal overstressing of a workpiece during grinding by a grinding arrangement having a grinding spindle and a driving machine, said process comprising the steps of:
- measuring at least a rotational speed of the grinding spindle during use;
- supplying said measured rotational speed of the grinding spindle to a data processing device;
- determining a measurement of the kinetic energy of said grinding spindle from said measured rotational speed;
- comparing said determined measurement of the kinetic energy with a kenetic energy reference value which is characteristic of overheating of said workpiece;
- adjusting at least one of said rotational speed and a grinding feed rate of said workpiece to maintain said determined kinetic energy below said kenetic energy reference value to prevent overheating of said workpiece;
- and
- determining oscillations of a power-supply voltage of said grinding spindle and controlling said process based upon oscillations in the speed of said grinding spindle.
A process for avoiding thermal overstressing of a workpiece during grinding by a grinding arrangement having a grinding spindle and a driving machine, said process comprising the steps of during use:
- measuring at least a rotational speed of the grinding spindle of the grinding spindle;
- supplying said measured rotational speed to a data processing device;
- determining a measurement of the kinetic energy of said grinding spindle from said measured rotational speed;
- comparing said determined measurement of the kinetic energy with a kinetic energy reference value which is characteristic of overheating of said workpiece;
- adjusting at least one of said rotational speed and a grinding feed rate of said workpiece to maintain said determined kinetic energy below said kinetic energy reference value to prevent overheating of said workpiece;
- and,
- during grinding of a gear, determining a rotational torque of a dividing apparatus of said grinding device, supplying the determined rotational torque value to the data processing device, determining therefrom a measurement for an asymmetry of an overmeasure distribution of a tooth gap, and controlling the grinding feed rate at least partially based upon said determined measure for the asymmetry of overmeasure distribution.
Dependencies are inferred from the claim text.