Stabilizing of Bolt Fastening Force by Using Ultrasonic Vibration

利用超声波振动稳定螺栓紧固力

• 批准号: 18560139
• 负责人: MORI Kazuya
• 金额: $ 2.39万
• 依托单位: Kumamoto University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2006
• 资助国家: 日本
• 起止时间: 2006 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18560139/
• 关键词: Thread; Ultrasonic; Fastening Force; Stabilizing; Torque Method

A method of stabilizing bolt-fastening force by using ultrasonic vibration has been developed. Applying ultrasonic vibration on the head of a bolt the distribution of the friction torque is decreased. To excite ultrasonic vibration a bolt Langevin transducer and a layered ceramic actuator are used.The most suitable vibration condition has been investigated by the Finite Element Method. The suitable frequency is 70 kHz for M6 thread. (The frequency depends on the geometry of the fastening machine.)Fastening tests for two conditions have been performed ; (1) Ultrasonic vibration, (2) No vibration. The number of test is fifty, respectively. The range of the fastening torque error is set under 5 %.According to the results, the average fastening force is 5229 N for the condition oil free. The standard deviation of the fastening force is 454 N.

已经开发出一种利用超声波振动稳定螺栓紧固力的方法。在螺栓头上施加超声波振动可以减少摩擦扭矩的分布。为了激发超声波振动，使用了螺栓朗之万传感器和层状陶瓷致动器。通过有限元方法研究了最合适的振动条件。 M6 螺纹的合适频率为 70 kHz。 （频率取决于紧固机的几何形状。）已进行两种条件的紧固测试； (1)超声波振动，(2)无振动。测试次数分别为五十。紧固扭矩误差范围设定在5%以下。根据结果，无油状态下的平均紧固力为5229N。紧固力的标准偏差为454 N。