Patents by Inventor Chuan-Tao Wang

Chuan-Tao Wang 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).

  • Draw-in map for stamping die tryout
    Patent number: 7130708
    Abstract: Sheet metal forming is a manufacturing process in which flat sheet metal is drawn into a die cavity to form a product shape. Draw-in amount is the single most important stamping index that controls all forming characteristics (strains and stresses), formability failures (splits, wrinkles) and surface quality (distortions) on a panel. Adaptation of a new die set for repetitively stamping sheet metal parts to a part design specification is simplified by using a math-based simulation of the stamping operation under specified engineering stamping conditions for the specified part. The stamping simulations are used to create an engineered draw-in map comparing selected locations on the peripheral edge of the stamped part with corresponding locations on the peripheral edge of its original sheet metal blank.
    Type: Grant
    Filed: April 1, 2003
    Date of Patent: October 31, 2006
    Assignee: General Motors Corporation
    Inventors: Chuan-Tao Wang, Norman Goan, Jimmy J. Zhang
  • Draw-in map for stamping die tryout
    Publication number: 20040199270
    Abstract: Sheet metal forming is a manufacturing process in which flat sheet metal is drawn into a die cavity to form a product shape. Draw-in amount is the single most important stamping index that controls all forming characteristics (strains and stresses), formability failures (splits, wrinkles) and surface quality (distortions) on a panel. Adaptation of a new die set for repetitively stamping sheet metal parts to a part design specification is simplified by using a math-based simulation of the stamping operation under specified engineering stamping conditions for the specified part. The stamping simulations are used to create an engineered draw-in map comparing selected locations on the peripheral edge of the stamped part with corresponding locations on the peripheral edge of its original sheet metal blank.
    Type: Application
    Filed: April 1, 2003
    Publication date: October 7, 2004
    Inventors: Chuan-Tao Wang, Norman Goan, Jimmy J. Zhang