Patents by Inventor Gopalakrishna Shastry

Gopalakrishna Shastry 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: 8450633
    Abstract: The disclosure relates to the automatic selection of a set of candidate weld guns and candidate orientations for the weld guns from a library of existing weld guns. Minimum values for weld points and test orientations are calculated. The calculated minimum values are added to the library. As each point is added to the library, the set of weld guns that are candidates for the weld point at the tested orientation may be efficiently retrieved, and a matrix of candidate weld guns and orientations is produced.
    Type: Grant
    Filed: February 29, 2008
    Date of Patent: May 28, 2013
    Assignee: GM Global Technology Operations LLC
    Inventors: Robert Bruce Tilove, Gopalakrishna Shastry, Sandipan Bandyopadhyay, Ashish Gupta, Narahari K. Hunsur
  • Patent number: 8032343
    Abstract: A method of weld design for a work piece is provided. The work piece may be a unitary piece or a multi-component piece. The method includes determining a manufacturing feasible region of the work piece satisfying one or more predetermined manufacturing requirements including accessibility of welding components. The method includes determining a performance feasibility function satisfying one or more predetermined performance factors as applied in a performance simulation of the work piece. The workpiece may have a varying number of welds. An optimized weld design may be determined by minimizing an objective function, defined as a summation of the number of welds and the performance feasibility function, within the manufacturing feasible region. The optimized weld design is configured to have a minimum number of welds, and concurrently satisfy the predetermined manufacturing requirements and the performance factors.
    Type: Grant
    Filed: July 24, 2008
    Date of Patent: October 4, 2011
    Assignee: GM Global Technology Operations LLC
    Inventors: Wayne W. Cai, Robert Bruce Tilove, Gopalakrishna Shastry
  • Patent number: 7974733
    Abstract: A method for estimating a plurality of geometrical parameters defining the size of a weld gun that has particular application for automatically selecting a weld gun for a welding operation. The method includes iteratively estimating a plurality of geometric parameters based on part section curves corresponding to a direction of approach of the weld gun to weld point of the plurality of weld points. Thereafter, a set of valid weld gun sizes are calculated based on the estimated plurality of geometric parameters. Similarly all the valid weld gun sizes are calculated corresponding to each of the weld gun approach direction. Further, each set of the valid gun sizes are estimated for each of the weld point for the welding operation. Finally, a weld gun for performing the welding operation is selected based on the set of weld gun sizes corresponding to the welding operation.
    Type: Grant
    Filed: January 30, 2009
    Date of Patent: July 5, 2011
    Assignee: GM Global Technology Operations LLC
    Inventors: Ashish Gupta, Gopalakrishna Shastry, Narahari K. Hunsur
  • Publication number: 20100198384
    Abstract: A method for estimating a plurality of geometrical parameters defining the size of a weld gun that has particular application for automatically selecting a weld gun for a welding operation. The method includes iteratively estimating a plurality of geometric parameters based on part section curves corresponding to a direction of approach of the weld gun to weld point of the plurality of weld points. Thereafter, a set of valid weld gun sizes are calculated based on the estimated plurality of geometric parameters. Similarly all the valid weld gun sizes are calculated corresponding to each of the weld gun approach direction. Further, each set of the valid gun sizes are estimated for each of the weld point for the welding operation. Finally, a weld gun for performing the welding operation is selected based on the set of weld gun sizes corresponding to the welding operation.
    Type: Application
    Filed: January 30, 2009
    Publication date: August 5, 2010
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: ASHISH GUPTA, GOPALAKRISHNA SHASTRY, NARAHARI K. HUNSUR
  • Publication number: 20100023150
    Abstract: A method of weld design for a work piece is provided. The work piece may be a unitary piece or a multi-component piece. The method includes determining a manufacturing feasible region of the work piece satisfying one or more predetermined manufacturing requirements including accessibility of welding components. The method includes determining a performance feasibility function satisfying one or more predetermined performance factors as applied in a performance simulation of the work piece. The workpiece may have a varying number of welds. An optimized weld design may be determined by minimizing an objective function, defined as a summation of the number of welds and the performance feasibility function, within the manufacturing feasible region. The optimized weld design is configured to have a minimum number of welds, and concurrently satisfy the predetermined manufacturing requirements and the performance factors.
    Type: Application
    Filed: July 24, 2008
    Publication date: January 28, 2010
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: Wayne W. Cai, Robert Bruce Tilove, Gopalakrishna Shastry
  • Publication number: 20090218329
    Abstract: The disclosure relates to the automatic selection of a set of candidate weld guns and candidate orientations for the weld guns from a library of existing weld guns. Minimum values for weld points and test orientations are calculated. The calculated minimum values are added to the library. As each point is added to the library, the set of weld guns that are candidates for the weld point at the tested orientation may be efficiently retrieved, and a matrix of candidate weld guns and orientations is produced.
    Type: Application
    Filed: February 29, 2008
    Publication date: September 3, 2009
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: Robert Bruce Tilove, Gopalakrishna Shastry, Sandipan Bandyopadhyay, Ashish Gupta, Narahari K. Hunsur