Abstract
In order to solve the problem of low precision and efficiency in the balancing process due to the movement of balance counterweights in a built-in mechanical on-line dynamic balance system, an optimization strategy for the mass compensation of the mechanical on-line dynamic balancing system is proposed, and a mass compensation optimization model is established. The optimization model takes the phase of counterweight movement as the optimization variable and the residual stress under dynamic balance as the optimization objective. Through the optimization model, the movement phase of the counterweight can be calculated, and the counterweight can be moved to a balanced position that significantly reduces the degree of unbalance. An experiment platform was built to carry out comparison experiments under different rotating speeds and unbalance levels. By comparing the residual stress, amplitude, and dynamic balancing time of the spindle before and after the balance, the accuracy of the phase of the counterweight that is calculated by the optimization model is verified. The optimized dynamic balance compensation strategy and the unoptimized were compared by experiments at different rotating speeds. The experimental results showed that, compared to the unoptimized balance, the amplitude of the spindle after optimizing balance with a dynamic balancing device can decrease by 30.39% on average, with its maximum amplitude decreasing by up 50.18%, and the balancing time can decrease by 31.72% on average, with its maximum balancing time decreasing by up to 43.86%. The research results showed that an optimization strategy can effectively improve dynamic balance efficiency and greatly reduce vibration amplitude, which provides the necessary theoretical basis for improving the running precision of the spindle system.
Highlights
High-end CNC(Computer Numerical Control) machine tools are essential equipment for intelligent manufacturing
The amplitude of the spindle decreased by an average of 30.39%, and the maximum amplitude decreased by 50.18% compared to the unoptimized balance
The average balance time decreased by 31.72%, and the maximum balance time decreased by 43.86%
Summary
High-end CNC(Computer Numerical Control) machine tools are essential equipment for intelligent manufacturing. Dynamic balance control methods and mass compensation strategies and efficiency of dynamic balance. Two types of balance disk movement control strategy that can be arbitrarily rotated in two directions relative to special have provided solutions thatcases can effectively improve the quality balance [6]. Li Xiaofeng et al deduced a high-speed flexible rotor without a method based on dynamic modal balance theory. This paper mainly focuses on the optimization of a mass compensation strategy that is applied to a built-in dynamic balance device of a spindle system based on current domestic and foreign research. For high-end CNC machine tools, a mass compensation optimization strategy can effectively balance their spindle, improve the machines’ operating stability, improve machining accuracy, and reduce equipment loss, which has good engineering application value
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