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高速加工運(yùn)動(dòng)性能預(yù)測(cè)方法研究
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國(guó)家科技重大專(zhuān)項(xiàng)資助項(xiàng)目(2013ZX04001-021)


Prediction of High-speed Machining Kinematic Performance
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    摘要:

    為了考察數(shù)控機(jī)床參數(shù)約束的運(yùn)動(dòng)性能對(duì)加工質(zhì)量和效率的影響，提出一種高速數(shù)控加工運(yùn)動(dòng)性能預(yù)測(cè)方法。以進(jìn)給速度為主要研究對(duì)象，利用柔性加減曲線控制方式，考慮機(jī)床參數(shù)制約、段間轉(zhuǎn)接速度約束，建立多軸聯(lián)動(dòng)加工進(jìn)給速度狀態(tài)方程。通過(guò)綜合后續(xù)狀態(tài)約束條件，簡(jiǎn)化動(dòng)態(tài)規(guī)劃狀態(tài)和決策變量的求解，得到進(jìn)給速度、加速度曲線的預(yù)估，并獲取進(jìn)給速度與約束參數(shù)、軸速度和約束軸的辨識(shí)關(guān)系，通過(guò)試件切削加工實(shí)驗(yàn)驗(yàn)證了所提方法的可行性。

    Abstract:

    The kinematic performance of the CNC machine tool plays an important role on surface processing quality and contour accuracy of the workpiece in high-speed CNC machining. This paper proposes a kinematic performance prediction method to investigate the dynamic indicators of the CNC machine tool. The feed rate is taken as main researched object. By the control mode of flexible acceleration and deceleration, the equation of state is established considering the constraints of machine tool parameters and the segment connection velocity. The preloading follow-up constraint status is used to simplify the solving for state variable and decision variable of the dynamic programming. The feed rate curves and jerk curves are presented to identify the constraint parameters and constraint axes. The experiment of the specimen cutting is implemented to verify the feasibility of this method. 

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謝東,丁杰雄,杜麗,王偉,宋智勇.高速加工運(yùn)動(dòng)性能預(yù)測(cè)方法研究[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2014,45(6):333-340. Xie Dong, Ding Jiexiong, Du Li, Wang Wei, Song Zhiyong. Prediction of High-speed Machining Kinematic Performance[J]. Transactions of the Chinese Society for Agricultural Machinery,2014,45(6):333-340.

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  • 收稿日期:2013-06-30
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  • 在線發(fā)布日期: 2014-06-10
  • 出版日期: 2014-06-10