Experiment of Bouncing Vibration in the Pin-on-Disk Tribosystem Resulting from a Misalignment between Pin and Disk

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  • ミスアライメントを有するピンオンディスク型摩擦系で生じる跳躍振動実験
  • ミスアライメント オ ユウスル ピンオンディスクガタ マサツケイ デ ショウジル チョウヤク シンドウ ジッケン

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On a newly designed pin-on-disk tribometer mounting a disk tilt mechanism, frictional vibration with bouncing of the silicon nitride ball-ended pin sliding on the silicon nitride flat disk was investigated. In the direction of sliding, disk tilt angle was able to set in the range of 90° ± 5° to pin axis and sinusoidal runout of the disk face during rotation was negligible. The pin motion during sliding was analyzed by a computer simulation using a coupled model of translational and rotational mass-spring-damper systems for the pin-on-disk assembly used. The effect of disk rotation speed and tilt angle of disk face on the occurrence of bouncing vibration was examined in the simulation. It was found that the pin sliding along upward slope, namely positive tilt angle, on the disk surface may bounce within certain rotation speed limits according to tilt angle and also bouncing never occur downslope with negative tilt angle below some specific higher sliding speed. Such simulation results were well recognized in the friction tests carried out on the present developed tribometer.

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