SONG Chong jie, YAO Zhe hao, MAO Hong yong, CHEN Jia, ZHAO Tie zhu

 

(School of Power and Mechanical Engineering, Wuhan University, Wuhan 430072, China)

 

 

Abstract: Aiming at the problem of the inconvenient fine adjustment and the low machining accuracy in the riveting process of wheel hub bearing, based on the theory of closed loop control, a new intelligent riveting machine was designed and studied, of which the feed displacement was controlled by a programmable logic controller and a servo motor. The lifting device of the riveting machine closed loop controlled by raster ruler was driven by a high power servo motor, a planetary reducer and a heavy duty ballscrew; In the detection device, a precision altimeter was adopted as a detection sensor to measure the height of blank and the height of finished product after machining; the spoke weighing sensor was mounted below the fixture, which can real time feedback working pressure when riveting processing. Production practice results indicate that, this intelligent riveting machine can realize the control of the zero or negative clearance of wheel hub bearing, and the machining precision for each component of wheel hub bearing can be reduced with the adoption of this intelligent riveting machine.

 

Key words: riveting machine; wheel hub bearing; negative clearance; sensor