Patents by Inventor Han-Chang Chung

Han-Chang Chung 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).

  • Method of optimizing the operation of a computer controlled machine tool
    Patent number: 4208718
    Abstract: The feed rate of a computer controlled machine tool is periodically calculated every 9.6 milliseconds to produce a horsepower equal to a target horsepower at the cutting tool during a milling operation. When the feed rate rises above a predetermined level, the target horsepower is progressively lowered, and when the feed rate drops below a predetermined level, the target horsepower is progressively raised. The total amount of cutting time for each tool is measured and the amount of cutting time under increased target horsepower is also measured. When the amount of cutting time under increased target horsepower exceeds a predetermined percentage of the total cutting time for any given tool, a DULL TOOl signal is generated and the designated tool is subsequently replaced. If no cutting time is recorded, a BROKEN TOOL signal is generated and the broken tool is replaced.
    Type: Grant
    Filed: June 5, 1978
    Date of Patent: June 17, 1980
    Assignee: Kearney & Trecker Corporation
    Inventor: Han-Chang Chung