Online active type cutting chatter restraining system and method for intelligent milling motorized spindle

Abstract

The invention provides an online active type cutting chatter restraining system and method for an intelligent milling motorized spindle. The online active type cutting chatter restraining system for the intelligent milling motorized spindle comprises a sensing portion, a controller and a chatter restraining adjustment and control device, wherein the sensing portion, the controller and the chatter restraining adjustment and control device are sequentially connected. The sensing portion comprises a non-contact type eddy current displacement sensor and a signal collector, wherein the non-contact type eddy current displacement sensor is installed at the front end of the spindle and used for measuring the axial displacement of the spindle, and the signal collector is used for collecting displacement signals of the non-contact type eddy current displacement sensor and converting the displacement signals to acceleration signals. The controller is used for outputting voltage control signals to the chatter restraining adjustment and control device according to the acceleration signals output by the signal collector. The chatter restraining adjustment and control device comprises a power amplifier and an active type electromagnetic bearing. The active type electromagnetic bearing comprises a rotor core and a stator core, wherein the rotor core is installed at the front end of the spindle, and a copper coil is wound around the stator core. The power amplifier is used for converting the received voltage signals into current control signals. The output end of the power amplifier is connected with the copper coil. The online active type cutting chatter restraining method for the intelligent milling motorized spindle comprises the steps of identifying and restraining chatter in the machining process.

Description

technical field [0001] The technical field of intelligent parts of high-end machine tools of the present invention relates to the field of intelligent electric spindles, specifically an online active cutting chatter suppression system and method for intelligent milling electric spindles. Background technique [0002] In recent years, with the continuous development of high-speed machine tool technology, especially high-speed spindle technology, which restricts the application of high-speed machining technology, high-speed milling technology has been more and more applied to actual processing. On the one hand, high-speed milling technology can greatly increase the cutting speed of workpiece materials and improve processing efficiency, thereby obtaining better economic benefits; on the other hand, it can also select smaller cutting depth and feed Speed, thereby reducing the cutting force, can further reduce the wear of the tool, the deformation of the workpiece and obtain bett...

AI Technical Summary

Problems solved by technology

Among them, the change of cutting parameters in the former will cause a large change in cutting force in the actual application process, which will cause impact on the spindle system, and it is also difficult to achieve the maximum processing efficiency without chatter; the latter uses damping to suppress chatter , including active and passive methods, but because the damping is difficult to accurately control, it is difficult to precisely regulate the spindle system to suppress the occurrence of flutter

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