Countermeasure of the pattern formation phenomena generated on rolling contact systems

滚动接触系统上产生的图案形成现象的对策

基本信息

批准号：
14550220
负责人：
TAKASHIRO Ryu
金额：
$ 1.86万
依托单位：
Oita University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2003
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-14550220/
关键词：
Vibration of Rotating Body Self-Excited Vibration Unstable Vibration Pattern Formation Contact Vibration Stability Analysis Rolling Contact System Time Delay System 磨耗摩擦製鉄機械ホットレベラ

项目摘要

There exist many rotatory machine systems in which a rotor is rotating under the condition of a constant pressure between outer circumference of the rotor and the other system being in contact with the rotor. Accompanying the deformation of the structure elements of the system itself, the development of the growth process into a strong vibration is often generated in the machine so that the continuous operation is not possible any more. This kind of phenomena is called pattern formation phenomena.As examples of the subject system in which such phenomena take place, we can give the press rolls in paper making machine, the winder of the textile machine, the rolling mill in the iron works, the drill cutting hole, regenerative chatter in the tool machine, the polygonal deformation of the grinding wheel, the corrugation of the rail, chattering in milling.In the field of machine tools, the mechanism of the pattern formation phenomena is widely investigated. However, the countermeasure to avoid the pattern formation phenomena has not been established. In this research, the countermeasure to avoid the pattern formation phenomena by changing the diameter of rolls, and by changing the operation speed is investigated. It was found from the numerical analysis that the optimum diameter ratio to suppress the pattern formation exists, and it was also found that the countermeasure by changing the operation speed is effective to decrease the growth speed of pattern formations.

存在许多旋转机系统，其中转子在转子外圆周和与转子接触的其他系统之间恒定压力的条件下旋转。伴随系统本身的结构元素的变形，通常在机器中产生增长过程成强大的振动，因此不再可能连续操作。这种现象称为模式形成现象。作为发生这种现象的主题系统的示例，我们可以在造纸机，纺织机的绕组机中，卷式轧机，铁工程中的滚动厂，钻孔孔，工具机中的再生聊天，磨轮的多边形变形，轨道的波纹，铣削中的chat不休。但是，尚未建立避免模式形成现象的对策。在这项研究中，研究了通过更改卷的直径以及改变操作速度来避免模式形成现象的对策。从数值分析中可以发现，最佳直径比抑制了模式形成，并且还发现，通过更改操作速度而进行的对策有效地降低了模式形成的生长速度。