Automatic on-line balancing system of liquid-injection high-speed main shaft

Abstract

The invention discloses an automatic on-line balancing system of a liquid-injection high-speed main shaft, which is mainly composed of a mechanical structure part and an electric control part, wherein the mechanical structure part comprises a water pan structure and a spray nozzle part; the water pan is directly installed on one end of the main shaft; a water channel in the water pan can ensure that liquid can be stably and accurately distributed in an appointed water cavity after the liquid is injected into the water pan via a spray nozzle; the spray nozzle is connected with a workbench, and the position and the angle of the spray nozzle can be adjusted; the electric control part obtains the vibration signal of the main shaft in real time; according to the vibration change situation of the main shaft, a valve assembly is controlled to precisely inject water; and vibration information collected before and after water is injected each time is used as a judgement basis for system control. The automatic on-line balancing system of a liquid-injection high-speed main shaft is characterized in that centrifugal force generated by the liquid offsets with the initial amount of the unbalance of the main shaft after repeated liquid injection, and the main shaft system is balanced.

Description

technical field [0001] The invention belongs to the technical field of high-speed dynamic balance equipment, and relates to a dynamic balance system for a machine tool spindle, in particular to a liquid-spraying type high-speed online automatic balance system for a spindle. Background technique [0002] Modern machining is developing in the direction of high speed and high precision, which puts forward more stringent requirements on the cutting efficiency and machining accuracy of high-end digital control machine tools. As the core component of CNC machine tools, the spindle is the key to determine the performance of machine tools. Due to the influence of factors such as machining and assembly errors, the coincidence between the center of gravity of the spindle and the center of rotation is poor, and a series of problems such as machine tool vibration and machine noise caused by centrifugal force directly affect the machining accuracy of the machine tool and limit the machini...

AI Technical Summary

Problems solved by technology

[0003] (1) The precision of modern mechanical processing has reached the level of submicron or even nanometer level. It can be imagined that in such precise processing, even a very small vibration between the workpiece and the tool will not only seriously reduce the surface quality of the workpiece, but also make the machining loss of precision

[0004] (2) Vibration will cause tool wear, and in severe cases, the processing will not continue, which will greatly hinder the use of flexible manufacturing systems, computer integrated manufacturing systems and the realization of unmanned processing

[0005] (3) In order to avoid or reduce vibration, sometimes the amount of processing has to be reduced, which limits the improvement of machining production efficiency

[0007] (1) Offline balancing takes too much time and is expensive;

[0008] (2) Off-line balancing is powerless if the distribution of unbalance changes during rotor operation;

[0015] The online dynamic balancing systems mentioned above all have some shortcomings. The laser weight removal method cannot restore the state before the adjustment, and the accuracy is not high, the auxiliary equipment is complicated, and it is difficult to apply it in the industrial field; the energy consumption in the balance device using electromagnetic force Large, the stress of the internal mechanical structure is large, and the magnetic field will be distorted and the nonlinear enhancement of the control will occur during high-speed operation, which greatly increases the difficulty of control

The balancing method of mixed execution generally has the disadvantages of long balancing time, cumbersome operation and complicated mechanical structure.

Images