An electromagnetically driven dynamic balancing device with a built-in spindle

Abstract

An electromagnetically driven dynamic balancing device with a built-in spindle belongs to the technical field of high-speed spindle dynamic balancing. Including the shielding cover and the electromagnetic driver I, counterweight plate I, moving ring, counterweight plate II, and electromagnetic driver II arranged along the fixed axis in the shielding cover; between the moving ring and the two counterweight plates and between the two counterweight plates and the fixed The shafts are connected by bearings, the counterweight plate and the electromagnetic driver are separated by a bearing fixing sleeve, the two electromagnetic drivers are fixed in the circumferential position by a flat key, and the two ends of the shielding cover are respectively provided with end covers, and the gap between the end cover and the electromagnetic driver is The spacer is set, and the moving ring is fixedly connected with the shielding cover; when working, the connection between the shielding cover and the main shaft is relatively fixed, and the moving ring is driven to rotate with the main shaft. The invention realizes offline correction of the dynamic unbalanced state of the main shaft. It can improve the rotation accuracy of the high-speed spindle, so as to realize the processing of high-quality parts. Low loss and high efficiency.

Description

Technical field [0001] The invention belongs to the technical field of high-speed spindle dynamic balancing, and particularly relates to a spindle built-in electromagnetic drive type dynamic balancing device used for off-line correction of dynamic imbalance. Background technique [0002] High-speed CNC machine tools are one of the technical foundations and development directions of the equipment manufacturing industry. The technical level of high-speed CNC machine tools is a sign that measures the level of a country's manufacturing industry. The main shaft is one of the most critical parts of all rotating CNC machine tools, and its performance has a vital influence on the machining accuracy and reliability of the entire machine tool. Unbalance of rotation is one of the main factors affecting the rotation accuracy of the spindle. The realization of dynamic balance on the spindle has become an indispensable key technology. It is the ultimate goal of improving the rotation accuracy,...

AI Technical Summary

Problems solved by technology

However, the built-in dynamic balancing device needs to be placed inside the main shaft to rotate with the main shaft. Any unreasonable design of the dynamic balancing device may bring additional dynamic imbalance and other effects to the main shaft, which is difficult to meet the requirements and development trends of high-speed CNC machine tools

Furthermore, due to the narrow space of the general spindle process hole and the complex structure of the dynamic balancing device, how to fix the dynamic balancing device in a small space and arrange the internal structure of the device is challenging.

At present, there is no built-in electromagnetic-driven spindle dynamic balancing device suitable for high-speed spindles at home and abroad that adopts a dual-plane dynamic balancing method.

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