Patents by Inventor Zhongjie Da

Zhongjie Da 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: 5903474
    Abstract: A method for achieving optimum selection of machining parameters and tool inserts for finish turning operations is provided. The method allows for the simultaneous consideration of the various machining performance criteria which are highly interactive and need to be taken into consideration when defining optimum cutting conditions or selecting optimum tool inserts. The method broadly includes the steps of (1) developing a process model relating performance variables for said operation with process parameters for said operation; (2) applying multiple criteria optimization techniques to construct a utility function relating the tool life and material removal rate for optimization, using surface roughness, cutting power, and chip breakability as constraints; (3) applying non-linear programming techniques to the process model so that optimum cutting conditions may be selected for given machining performance requirements. This method may also take into account the progressive wear state of the tool being used.
    Type: Grant
    Filed: April 30, 1997
    Date of Patent: May 11, 1999
    Assignee: University of Kentucky Research Foundation
    Inventors: John P. Sadler, Ibrahim S. Jawahir, Zhongjie Da, Seog S. Lee
  • Patent number: 5801963
    Abstract: A computer implemented method for achieving optimum selection of machining parameters and tool inserts for finish turning operations is provided. The computer implemented method allows for the simultaneous consideration of the various machining performance criteria which are highly interactive and need to be taken into consideration when defining optimum cutting conditions or selecting optimum tool inserts for particular cutting conditions.
    Type: Grant
    Filed: November 8, 1996
    Date of Patent: September 1, 1998
    Assignee: The University of Kentucky Research Foundation
    Inventors: John P. Sadler, Ibrahim S. Jawahir, Zhongjie Da, Seog S. Lee