Main shaft dynamic balance double-plane equivalent force balance adjustment method

Abstract

The invention relates to a main shaft dynamic balance double-plane equivalent force balance adjustment method and belongs to the high-speed main shaft on-line dynamic balance technical field. According to the method of the invention, two sets of mass block assemblies which are concentric and parallel to each other generate mass eccentricity, and when a main shaft rotates, the mass eccentricity generates a balance force which is identical with a dynamic unbalance force of the main shaft itself in position and magnitude and is opposite to the dynamic unbalance force in direction. The method specifically includes the following steps that: the axial positions 1A and 1B of the two sets of mass block assemblies in the inner hole of the main shaft are marked; a centrifugal force FD borne by a radial plane where the two sets of mass block assemblies are located are equivalently divided into an equivalent force FA' and an equivalent force FB' of positions where the two sets of dynamic balance mass block assemblies are located, wherein the radial plane is vertical to the main shaft; and a balance force FA and a balance force FB required to be generated for the dynamic balance mass block assemblies well as vector directions theta A and theta B of the dynamic balance mass block assemblies are calculated, and the adjustment angles beta 1 and beta 2 of a small mass block and a large mass block are calculated. With the method of the invention adopted, adjustment angles required by each mass block can be calculated under the condition that the installation positions of the mass block assemblies are unknown, and therefore, the dynamic unbalance state of the main shaft can be adjusted.

Description

technical field [0001] The invention belongs to the technical field of on-line dynamic balancing of high-speed spindles, and in particular relates to a dual-plane equivalent force balance adjustment method for a spindle dynamic balance. 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 to measure the level of a country's manufacturing industry. The main shaft is one of the most critical components in all rotating CNC machine tools, and its performance has a crucial impact on the machining accuracy and reliability of the entire machine tool. Rotational imbalance 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 striving to improve the rotation accuracy, reliab...

AI Technical Summary

Problems solved by technology

At present, a method suitable for the dual-plane dynamic balancing device built in the main shaft to realize the dynamic balance adjustment of the main shaft has not been found at home and abroad.

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