Patents by Inventor Chenchao LI

Chenchao LI has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11969805
    Abstract: A method and device for milling a large-diameter aspheric surface by using a splicing method and a polishing method to solve the problems of large time consumption and serious tool wear in the machining of a meter-scale large-diameter aspheric surface are disclosed. where an aspheric surface is discretized into a series of rings with different radii, and the rings are sequentially machined via generating cutting by using an annular grinding wheel tool with an outer diameter less than ¼ of a diameter of the aspheric surface; the rings are equally spaced, there are a total of N rings, and a width of any ring is jointly determined by the Nth ring, the (N?1)th ring, positioning accuracy and a generatrix equation of the aspheric surface; and the aspheric surface is enveloped by a large number of rings. A contact area between the tool and a workpiece surface is rings.
    Type: Grant
    Filed: July 30, 2020
    Date of Patent: April 30, 2024
    Assignee: SOOCHOW UNIVERSITY
    Inventors: Xi Chen, Zhuocheng Dai, Peiji Guo, Yongxiang Zhu, Chenchao Li
  • Publication number: 20220193795
    Abstract: A method and device for milling a large-diameter aspheric surface by using a splicing method and a polishing method to solve the problems of large time consumption and serious tool wear in the machining of a meter-scale large-diameter aspheric surface are disclosed. where an aspheric surface is discretized into a series of rings with different radii, and the rings are sequentially machined via generating cutting by using an annular grinding wheel tool with an outer diameter less than ¼ of a diameter of the aspheric surface; the rings are equally spaced, there are a total of N rings, and a width of any ring is jointly determined by the Nth ring, the (N?1)th ring, positioning accuracy and a generatrix equation of the aspheric surface; and the aspheric surface is enveloped by a large number of rings. A contact area between the tool and a workpiece surface is rings.
    Type: Application
    Filed: July 30, 2020
    Publication date: June 23, 2022
    Inventors: Xi CHEN, Zhuocheng DAI, Peiji GUO, Yongxiang ZHU, Chenchao LI
  • Publication number: 20220179389
    Abstract: A method for numerical control milling, forming and polishing of a large-diameter aspheric lens to solve the problems of long time-consuming and severe tool wear in the machining of a meter-scale large-diameter aspheric surface is disclosed. An aspheric surface is discretized into a series of rings with different radii, and the rings are sequentially machined through generating cutting by using an annular grinding wheel tool; the rings are equally spaced, there are a total of N rings, and the width of any ring is jointly determined by the Nth ring, the (N?1)th ring, positioning accuracy, and a generatrix equation of the aspheric lens, and the nth ring has a curvature radius of Rn=sqrt(R02?k*(n*dx)2); and the aspheric surface is enveloped by a large number of rings.
    Type: Application
    Filed: July 30, 2020
    Publication date: June 9, 2022
    Inventors: Xi CHEN, Peiji GUO, Zhuocheng DAI, Yongxiang ZHU, Chenchao LI