Patents by Inventor Surendra B. Rao

Surendra B. Rao 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).

  • Monitoring machine tool conditions by measuring a force component and a vibration component at a fundamental natural frequency
    Patent number: 4559600
    Abstract: Methods and apparatus for monitoring, during machining of a workpiece (30,30'), the wear condition of a cutting tool (31,31') having its cutting portion in a structure (32,32') that is held by substantially more massive means (33,33').A dynamometer (35,35') and filter (36) measure the component of the dynamic force exerted between the tool (31,31') and the workpiece (30,30') approximately in the direction (A,A') normal to the primary cutting edge (34,34') of the tool (31,31') and to the main cutting velocity (V,V') at approximately the fundamental natural frequency of the held structure (32,32') in the same normal direction (A,A'). An accelerometer (37,37'), filter (38), and integrators (39) measure the component of vibration in the tool (31,31') approximately in the same normal direction (A,A') at approximately the same frequency.
    Type: Grant
    Filed: February 28, 1983
    Date of Patent: December 17, 1985
    Assignee: Battelle Memorial Institute
    Inventor: Surendra B. Rao