Analysis and Control of Nonlinear Error in Six-Axis Five-Linkage CNC Machining

doi:10.16080/j.issn1671-833x.2022.09.014

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Analysis and Control of Nonlinear Error in Six-Axis Five-Linkage CNC Machining

更新时间：2025-07-30

- Analysis and Control of Nonlinear Error in Six-Axis Five-Linkage CNC Machining
- Aeronautical Manufacturing Technology Vol. 65, Issue 9, (2022)
- 作者机构：
  
  1. 大连交通大学,大连,116028
  2. 徐州徐工矿业机械有限公司,徐州,221000
- 作者简介：
- 基金信息：
- DOI：10.16080/j.issn1671-833x.2022.09.014
  CLC：
- Published：2022
- 稿件说明：
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沙智华，冯琳琳，马付建，宋秀莹，王紫光，张生芳. 六轴五联动数控加工非线性误差的分析与控制[J]. 航空制造技术, 2022, 65(9): 14-19.

SHA Zhihua，FENG Linlin，MA Fujian，SONG Xiuying，WANG Ziguang，ZHANG Shengfang. Analysis and Control of Nonlinear Error in Six-Axis Five-Linkage CNC Machining[J]. Aeronautical Manufacturing Technology, 2022, 65(9): 14-19.
沙智华，冯琳琳，马付建，宋秀莹，王紫光，张生芳. 六轴五联动数控加工非线性误差的分析与控制[J]. 航空制造技术, 2022, 65(9): 14-19. DOI： 10.16080/j.issn1671-833x.2022.09.014.

SHA Zhihua，FENG Linlin，MA Fujian，SONG Xiuying，WANG Ziguang，ZHANG Shengfang. Analysis and Control of Nonlinear Error in Six-Axis Five-Linkage CNC Machining[J]. Aeronautical Manufacturing Technology, 2022, 65(9): 14-19. DOI： 10.16080/j.issn1671-833x.2022.09.014.

摘要

多轴联动数控加工中数控系统线性插补和实际刀具轨迹的不一致性，导致了非线性误差的产生。通过建立非线性误差模型，预测了最大非线性误差的位置；通过分析曲线拟合度并采用抛物线函数法进一步完善误差模型，分析非线性误差的影响因素；通过自适应线性化法将超差程序段控制在误差允值范围内。以圆盘刀六轴五联动数控加工叶片曲面为例，对其刀位文件进行仿真分析，控制后采样程序段的非线性误差得到明显改善，最大非线性误差的标准差降低近84.5%，验证了该控制方法的有效性。

Abstract

Due to the inconsistency between the linear interpolation of CNC system and the actual tool path in multiaxis CNC machining

the nonlinear error is caused. In this study

the nonlinear error model is established to predict the position of the maximum nonlinear error

the parabola function method is used to further optimization the error model by analyzing the curve fitting degree

and the influence factors of nonlinear error are analyzed. The overerror program segment is controlled within the allowable value of error by adaptive linearization method. Taking the six-axis and five-linkage CNC machining of blade surface with disk knife as an example

the tool position file is simulated and analyzed. The nonlinear error of sampling program section is obviously improved after control

and the standard deviation of maximum nonlinear error is reduced by nearly 84.5%. The effectiveness of the above control method is verified.

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