Speed-priority spline real-time interpolation method facing high-speed processing

A real-time interpolation, spline curve technology, applied in the direction of instruments, computer control, simulators, etc., can solve problems such as reducing the reliability of the numerical control system, speeding up tool wear, etc., to achieve precise positioning, taking into account tool wear and processing quality, and improving The effect of processing efficiency

Active Publication Date: 2012-07-11
中国科学院沈阳计算技术研究所有限公司
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Problems solved by technology

[0005] At the same time, different processing methods will also affect the speed planning algorithm. Especially for high-speed machining, it is impossible to guarantee that the processing speed will always be greate

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  • Speed-priority spline real-time interpolation method facing high-speed processing
  • Speed-priority spline real-time interpolation method facing high-speed processing
  • Speed-priority spline real-time interpolation method facing high-speed processing

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Embodiment Construction

[0047] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0048] Such as figure 1 As shown, the speed priority spline curve real-time interpolation method for high-speed machining of the present invention comprises the following steps:

[0049] Find the speed limit curve: find it in the interpreter of the CNC system according to the machining error and the maximum acceleration constraints of each motion axis;

[0050] Divide the processing area: divide the speed processing area according to the critical speed information of the processed material entering the high-speed processing area, and modify the above initial speed curve to obtain the modified speed curve;

[0051]Speed ​​curve reverse link: remove the speed discontinuity point on the modified speed curve, making the whole speed curve continuous;

[0052] Real-time interpolation: perform interpolation operation according to the reverse-linked speed curve, an...

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Abstract

The invention relates to a speed-priority spline real-time interpolation method facing the high-speed processing, which comprises the following steps of: obtaining a speed limit curve, i.e. obtaining the speed limit curve according to a processing error and constraint conditions of the maximum acceleration of each movement shaft in an interpreter of a numerical control system; dividing a processing region, i.e. according to information of a critical speed that processed materials enter the high-speed processing region, dividing the speed processing region and modifying an initial speed curve to obtain a modified speed curve; carrying out backward chaining on the speed curve, i.e. removing speed discontinuous points on the modified speed curve, so that the integral speed curve is continuous; and carrying out real-time interpolation, i.e. according to the speed curve subjected to backward chaining, carrying out interpolation algorithm to complete the speed-priority spline real-time interpolation. The invention provides a time approximation optimal spline curve interpolation method. In the speed-priority spline real-time interpolation method, on the premise of ensuring the stable operation of a machine tool, the maximum acceleration capacity of a single shaft is sufficiently utilized, so that the requirement of the numerical control system on the high-speed processing is met.

Description

technical field [0001] The invention relates to a speed processing technology of a numerical control system, in particular to a speed-priority spline curve real-time interpolation method for high-speed machining. Background technique [0002] Salomon, the father of high-speed machining, found in cutting experiments that when the cutting speed reaches a certain value, the cutting temperature no longer increases with the increase of the cutting speed, but shows a downward trend, and then resumes with the increase of the cutting speed. And keep increasing. According to the above findings, Salomon proposed the theory of high-speed machining. [0003] Compared with traditional machining, high-speed machining has obvious advantages. First, because high-speed machining reduces cutting force and cutting temperature, it helps to improve the quality of the machined surface. Secondly, high-speed machining can reduce tool wear and replace some traditional machining processes, which ca...

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Application Information

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IPC IPC(8): G05B19/41
Inventor 林浒孙玉娥于东韩旭卜霄菲
Owner 中国科学院沈阳计算技术研究所有限公司
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