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Passively damped vibration welding system and method

United States Patent

April 2, 2013
View the Complete Patent at the US Patent & Trademark Office
A vibration welding system includes a controller, welding horn, an anvil, and a passive damping mechanism (PDM). The controller generates an input signal having a calibrated frequency. The horn vibrates in a desirable first direction at the calibrated frequency in response to the input signal to form a weld in a work piece. The PDM is positioned with respect to the system, and substantially damps or attenuates vibration in an undesirable second direction. A method includes connecting the PDM having calibrated properties and a natural frequency to an anvil of an ultrasonic welding system. Then, an input signal is generated using a weld controller. The method includes vibrating a welding horn in a desirable direction in response to the input signal, and passively damping vibration in an undesirable direction using the PDM.
Tan; Chin-An (Troy, MI), Kang; Bongsu (Fort Wayne, IN), Cai; Wayne W. (Troy, MI), Wu; Tao (Temple, AZ)
GM Global Technology Operations LLC (Detroit, MI)
13/ 438,200
April 3, 2012
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT This invention was made with the support of the United States Government under an Agreement/Project DE-EE0002217, Department of Energy Recovery and Reinvestment Act of 2009, Battery Pack Manufacturing B511. The United States Government may have certain rights in this invention.