Grinding Cut-In Control Using AE and Motor Current Signals

The patent combines the output signals of both the AE sensor and the motor power sensor to control the cut-in speed. The controller integrates information from both sensors to determine the optimal timing for switching cut-in speed, thereby avoiding premature speed reduction while maintaining accurate contact detection. This merging of multiple detection methods resolves the contradiction between early detection precision and machining efficiency.

The patent introduces the AE sensor as an intermediary detection device that directly detects the contact between the grinding member and the workpiece. This intermediary provides real-time contact information that complements the motor power sensor data, enabling the controller to switch the cut-in speed at the appropriate timing without the time lag inherent in motor current-based control alone.

The patent dynamically adjusts the cut-in speed in two stages based on integrated feedback from both AE sensor and motor power sensor. Initially, a relatively high cut-in speed is maintained to reduce machining time. After contact is detected through the combined sensor system, the cut-in speed is then switched to a relatively low value to ensure grinding quality. This dynamic, two-stage speed control resolves the contradiction between machining time and grinding quality.