Grinding force sensor and measuring method thereof

Abstract

The invention provides a grinding force sensor and a measuring method thereof. The grinding force sensor comprises a contact head, an upper triangular guiding beam, a lower triangular guiding beam and a hanging lug; the hanging lug is packaged with a transforming element; the transforming element is a silicon chip or a metal strain gauge; the silicon chip or the metal strain gauge form into a wheatstone bridge; the transforming element is connected with an external processing circuit. When the grinding force sensor is used, the grinding force sensor which is served as a machine tool side limit clamp is connected with a machined workpiece, the hanging lug generates bending deformation due to the fact that tangential force of the grinding force acts on the hanging lug due to a contact head after orthogonal decomposition, the resistance value of a piezoresistor of the transforming element changes due to the fact that the bending deformation is transmitted to the transforming element, an output end of the wheatstone bridge which is formed by the piezoresistor outputs electric signals which are in directly proportional with the to-be-measured tangential force, and accordingly measurement of the tangential force is achieved.

Description

technical field [0001] The invention relates to the technical field of force measurement, in particular to a grinding force sensor and a measuring method thereof, which can convert force into torque and are beneficial to improving the sensitivity of the sensor. Background technique [0002] Grinding is the most ideal processing method for brittle materials and workpieces that require high machining accuracy, and during the grinding process, the grinding force of the grinding wheel is an important indicator that reflects the grinding state. During the continuous grinding process of the grinding wheel, the abrasive particles on it will be passivated, shed or even blocked, which will reduce the sharpness of the grinding wheel, so that under the same process parameters, the grinding force will increase significantly, causing the system Vibration reduces machining accuracy and increases the probability of defective products. [0003] Therefore, real-time monitoring of the change...

AI Technical Summary

Problems solved by technology

At present, the measurement of grinding force adopts special load cells. These load cells are generally installed in the tool clamping position. This method not only destroys the integrity of the hardware structure, but also reduces the rigidity of the system. Complicated installation and high cost

At present, for the monitoring of the grinding state, there are also multi-sensor information fusion intelligent monitoring systems such as force sensors, acoustic emission sensors, and power sensors to monitor the grinding state of the grinding wheel, but this method has a complex structure, redundant information, and post-processing workload. Big, slow response, easy to interfere with each other

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