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Research and implementation of NURBS interpolator with continuous feedrate for high-speed machining.

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Title: Research and implementation of NURBS interpolator with continuous feedrate for high-speed machining.
Authors: Zhou, Huicheng1 (AUTHOR), Wu, Jichun1 (AUTHOR) wujichun888@gmail.com, Tang, Xiaoqi1 (AUTHOR), Chen, Jihong1 (AUTHOR)
Source: International Journal of Production Research. Nov2012, Vol. 50 Issue 22, p6457-6468. 12p. 2 Color Photographs, 2 Black and White Photographs, 7 Diagrams, 2 Charts, 4 Graphs.
Subjects: Computer-aided design, Programming of numerically controlled machine tools, Machining, Interpolation, Splines, Mathematical models, Manufacturing processes, Equipment & supplies
Abstract: Using non-uniform rational B-splines (NURBS) rather than piecewise lines and arc segments as a toolpath makes it much easier to achieve high-speed control in die and mould machining. When NURBS is used as a toolpath, two issues must be solved. The first is how to convert the discrete cutter location (CL) data offset from a CAD model into a NURBS curve. The second is how to maintain low velocity fluctuation while interpolating the NURBS curve with limited calculation time. This study proposes a NURBS toolpath generation method from line segments and a real-time NURBS interpolator for CNC machines to achieve the goal of high-speed machining. A CL data simplification method with shape holding is presented based on identifying and correcting the defect point from the original CL data, and removing redundant CL data within shape-maintaining requirements. Then the conversion of all simplified CL data to NURBS curves is done by applying NURBS fitting or interpolation with optional directional constraints. A precise method based on nonlinear mapping between the NURBS's parameter and arc length is proposed and implemented to obtain a continuous feedrate and machining quality. The simulation performed on CL points for a wave surface demonstrates that the proposed approach reduces the NC blocks to 6% while staying within the tolerance of deviation. The machining experiment shows that the proposed approach can increase machining quality while reducing machining time by about 22%. [ABSTRACT FROM PUBLISHER]
Copyright of International Journal of Production Research is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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Items – Name: Title
  Label: Title
  Group: Ti
  Data: Research and implementation of NURBS interpolator with continuous feedrate for high-speed machining.
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  Label: Authors
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  Data: <searchLink fieldCode="AR" term="%22Zhou%2C+Huicheng%22">Zhou, Huicheng</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wu%2C+Jichun%22">Wu, Jichun</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> wujichun888@gmail.com</i><br /><searchLink fieldCode="AR" term="%22Tang%2C+Xiaoqi%22">Tang, Xiaoqi</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Chen%2C+Jihong%22">Chen, Jihong</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22International+Journal+of+Production+Research%22">International Journal of Production Research</searchLink>. Nov2012, Vol. 50 Issue 22, p6457-6468. 12p. 2 Color Photographs, 2 Black and White Photographs, 7 Diagrams, 2 Charts, 4 Graphs.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Computer-aided+design%22">Computer-aided design</searchLink><br /><searchLink fieldCode="DE" term="%22Programming+of+numerically+controlled+machine+tools%22">Programming of numerically controlled machine tools</searchLink><br /><searchLink fieldCode="DE" term="%22Machining%22">Machining</searchLink><br /><searchLink fieldCode="DE" term="%22Interpolation%22">Interpolation</searchLink><br /><searchLink fieldCode="DE" term="%22Splines%22">Splines</searchLink><br /><searchLink fieldCode="DE" term="%22Mathematical+models%22">Mathematical models</searchLink><br /><searchLink fieldCode="DE" term="%22Manufacturing+processes%22">Manufacturing processes</searchLink><br /><searchLink fieldCode="DE" term="%22Equipment+%26+supplies%22">Equipment & supplies</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Using non-uniform rational B-splines (NURBS) rather than piecewise lines and arc segments as a toolpath makes it much easier to achieve high-speed control in die and mould machining. When NURBS is used as a toolpath, two issues must be solved. The first is how to convert the discrete cutter location (CL) data offset from a CAD model into a NURBS curve. The second is how to maintain low velocity fluctuation while interpolating the NURBS curve with limited calculation time. This study proposes a NURBS toolpath generation method from line segments and a real-time NURBS interpolator for CNC machines to achieve the goal of high-speed machining. A CL data simplification method with shape holding is presented based on identifying and correcting the defect point from the original CL data, and removing redundant CL data within shape-maintaining requirements. Then the conversion of all simplified CL data to NURBS curves is done by applying NURBS fitting or interpolation with optional directional constraints. A precise method based on nonlinear mapping between the NURBS's parameter and arc length is proposed and implemented to obtain a continuous feedrate and machining quality. The simulation performed on CL points for a wave surface demonstrates that the proposed approach reduces the NC blocks to 6% while staying within the tolerance of deviation. The machining experiment shows that the proposed approach can increase machining quality while reducing machining time by about 22%. [ABSTRACT FROM PUBLISHER]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of International Journal of Production Research is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1080/00207543.2011.651170
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 12
        StartPage: 6457
    Subjects:
      – SubjectFull: Computer-aided design
        Type: general
      – SubjectFull: Programming of numerically controlled machine tools
        Type: general
      – SubjectFull: Machining
        Type: general
      – SubjectFull: Interpolation
        Type: general
      – SubjectFull: Splines
        Type: general
      – SubjectFull: Mathematical models
        Type: general
      – SubjectFull: Manufacturing processes
        Type: general
      – SubjectFull: Equipment & supplies
        Type: general
    Titles:
      – TitleFull: Research and implementation of NURBS interpolator with continuous feedrate for high-speed machining.
        Type: main
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      – PersonEntity:
          Name:
            NameFull: Zhou, Huicheng
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          Name:
            NameFull: Wu, Jichun
      – PersonEntity:
          Name:
            NameFull: Tang, Xiaoqi
      – PersonEntity:
          Name:
            NameFull: Chen, Jihong
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            – D: 15
              M: 11
              Text: Nov2012
              Type: published
              Y: 2012
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              Value: 50
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              Value: 22
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            – TitleFull: International Journal of Production Research
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