Chinese Journal of Mechanical Engineering >

2022 , Vol. 35 >Issue 5: 108 - 108

DOI: https://doi.org/10.1186/s10033-022-00782-5

Wheel Setting Error Modeling and Compensation for Arc Envelope Grinding of Large-Aperture Aspherical Optics

  • Changsheng Li ,
  • Lin Sun ,
  • Zhaoxiang Chen ,
  • Jianfang Chen ,
  • Qijing Lin ,
  • Jianjun Ding ,
  • Zhuangde Jiang
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  • 1. State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an, 710049, China;
    2. School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an, 710049, China;
    3. Shaanxi Qinchuan Precision CNC Machine Tool Engineering Research Co, Xi'an, 710018, China

Received date: 2021-01-04

  Revised date: 2021-07-07

  Online published: 2023-04-24

Supported by

Supported by Fellowship of China National Postdoctoral Program for Innovative Talents (Grant No. BX20200268), Research Project of State Key Laboratory of Mechanical System and Vibration (Grant No. MSV202103), National Natural Science Foundation of China (Grant No. 51720105016), and Higher Education Discipline Innovation Project (Grant No. B12016).

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Abstract

Precision grinding is a key process for realizing the use of large-aperture aspherical optical elements in laser nuclear fusion devices, large-aperture astronomical telescopes, and high-resolution space cameras. In this study, the arc envelope grinding process of large-aperture aspherical optics is investigated using a CM1500 precision grinding machine with a maximum machinable diameter of Φ1500 mm. The form error of the aspherical workpiece induced by wheel setting errors is analytically modeled for both parallel and cross grinding. Results show that the form error is more sensitive to the wheel setting error along the feed direction than that along the lateral direction. It is a bilinear function of the feed-direction wheel setting error and the distance to the optical axis. Based on the error function above, a method to determine the wheel setting error is proposed. Subsequently, grinding tests are performed with the wheels aligned accurately. Using a newly proposed partial error compensation method with an appropriate compensation factor, a form error of 3.4 μm peak-to-valley (PV) for a Φ400 mm elliptical K9 glass surface is achieved.

Key words： Aspherical optics; Wheel setting; Arc envelope grinding; Form error; Large aperture

Cite this article

Changsheng Li , Lin Sun , Zhaoxiang Chen , Jianfang Chen , Qijing Lin , Jianjun Ding , Zhuangde Jiang . Wheel Setting Error Modeling and Compensation for Arc Envelope Grinding of Large-Aperture Aspherical Optics[J]. Chinese Journal of Mechanical Engineering, 2022 , 35(5) : 108 -108 . DOI: 10.1186/s10033-022-00782-5

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