Perfect Countermeasure against Pattern Formation Phenomena Generated in Contact Rotating Systems

针对接触旋转系统中产生的图案形成现象的完美对策

基本信息

批准号：
18360112
负责人：
SUEOKA Atsuo
金额：
$ 9.9万
依托单位：
Kyushu University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
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-18360112/
关键词：
Self-excited Vibration Stability Modal Analysis Pattern Formation Polygonal Wear Dynamic Absorber Quenching of Pattern Formation BTA Cutting Polonal Wear 振動制御自励振動パターン形成現象接触回転系摩耗多角形摩耗安定性

项目摘要

This investigation deals with a countermeasure by using dynamic absorbers for polygonal wear of work rolls in a hot leveler of steel making machine and proposes the optimal design method of dynamic absorbers. In the case of the actual machine in which the contact rigidity between rolls and plate is comparatively soft, it was shown that the polygonal wear phenomena were all perfectly suppressed by two dynamic absorbers. An experimental equipment of a single degree-of-freedom pattern formation system with a pair of contact rotating rolls and a dynamic absorber are made. According to the results of the experiments without dynamic absorber, it is confirmed that the relation among the natural frequency of the system, the polygonal number and the rotating speed agree with the analytical results qualitatively. According to the results of the experiments using a damped dynamic absorber, the delaying effect of pattern formation is confirmed. Also, a good quantitative agreement between the exper … More imental and analytical results is confirmed. Moreover, it is confirmed that damping of a dynamic absorber is necessary to delay pattern formation phenomena.Next we deals with a countermeasure against pattern formation phenomena generated on film winder using dynamic absorbers. Pattern formation phenomena of the wound sheet sometimes occur in operation because of the viscoelastic characteristics of the film. The pattern formation phenomena lead to a fatal damage on the film. We conducted experiment to generate the pattern formation using experimental apparatus, and theoretically analyzed to clarify the mechanism of the pattern formation phenomena considering the elastic deformation of the rolls. They also theoretically examined the countermeasure to suppress the phenomena by attaching some dynamic absorbers. The effectiveness of the tunable dynamic absorbers was confirmed by the theoretical analysis.The pattern formation phenomena, namely, rifling marks in the BTA deep hole cutting process were treated experimentally and analytically. It was shown that the optimal angles among cutting edge and guides exited and the rifling marks were not generated for the optimally designed BTA. Less

本研究针对炼钢机热矫直机工作辊多边形磨损采用动态减振器的对策，并针对实际设备中轧辊与板材接触刚度较大的情况，提出了动态减振器的优化设计方法。相对较软，结果表明，两个动态吸收器都可以完美地抑制多边形磨损现象，制作了一对接触旋转辊和动态吸收器的单自由度图案形成系统的实验装置。根据无动力减振器的实验结果，证实了系统的固有频率、多边形数和转速之间的关系与阻尼动力实验的结果定性一致。此外，还证实了实验结果和分析结果之间良好的定量一致性。此外，还证实了动态吸收器的阻尼对于延迟图案形成现象是必要的。处理对策针对使用动态吸收器的薄膜卷绕机上产生的图案形成现象，由于薄膜的粘弹性特性，有时会出现图案形成现象，从而对薄膜产生致命的损坏。他们还利用实验装置对图案形成进行了理论分析，以阐明考虑到辊的弹性变形的图案形成现象的机理，并从理论上研究了通过附加一些动态吸收器来抑制该现象的对策。被证实对BTA深孔切削过程中的花纹形成现象，即膛线痕迹进行了实验和分析，结果表明，存在切削刃与导轨之间的最佳角度，并且没有产生最佳的膛线痕迹。设计的BTA较少。