Elucidation of Pattern Formation Phenomena Generated in Contact Rotating Systems

接触旋转系统中产生的图案形成现象的阐明

• 批准号: 10450092
• 负责人: SUEOKA Atsuo
• 金额: $ 7.36万
• 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: 1998
• 资助国家: 日本
• 起止时间: 1998 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10450092/
• 关键词: Vibration of Rotating Body; Frictional Vibration; Viscoelastic Body; Wear; Pattern Formation; Chattering; DC Motor; Hot Leveler; 研削加工

1. The polygonal deformation phenomena of a workpiece in centerless grinding process were modeled as a linear system with time lag accompanied by grinding and friction, and were analyzed theoretically and computed numerically. The theoretical results were compared with the usual experimental results. As a results, the presented theoretical results can explain all the experimental ones. It was made clear that the centerless grinding process was very unstable.2. Pattern formation phenomena generated in a roll system consisting of a piece of metal rolls were experimentally taken into account. In the experiments using titan, SCM, SUS, and S45C as roll material, the vertical and horizontal vibrations occurred selectively according to the material characteristics like materials easy to wear, hard and soft materials. The process in which the pattern phenomena grew up were observed. The results do a major service to setting of an apparatus for polygonal wear of hot leveler rolls.3. The experim … More ent to confirm the flashover phenomena generated in DC motor was performed. However, the pattern seems to grow up, but the growth stops during an experiment halfway, so the flashover is not yet confirmed. Basic experiments were performed once more, and we started the analysis all over again, since it was made clear that the natural frequencies of rotating body have effects upon the pattern formation. Since disagreement between experimental and theoretical results was found on the following points, the electric force generated in DC motor will be examined : (1) Four polygonal pattern which occurs on the commutator in the actual machine is not remarkably generated in the analytical results. (2) Generation of only even polygonal deformation in actual machine can not be explained by the analysis.4. Regarding the unstable vibration generated in the multi-stage calender roll system of paper making machine as a pattern formation phenomena, the analysis was performed and a good agreement between experimental and analytical results was confirmed. Pattern formations due to higher vibration modes are remarkable.5. The polygonal wear of rolls in hot leveler of steel making machine was analyzed. First, the shape of rolls disused already was measured. Next, the vibration measurement of the actual hot leveler was performed. Then an analytical model for polygonal wear of rolls was presented. Delay countermeasure of polygonal wear of rolls will be proposed in the near future, and the detail analysis will be continued. Less

1.将无心磨削过程中工件的多边形变形现象建模为伴随磨削和摩擦的线性系统，并进行理论分析和数值计算，将理论结果与通常的实验结果进行比较。 ，所提出的理论结果可以解释所有的实验结果，表明无心磨削过程非常不稳定。2．实验考虑了由一块金属辊组成的辊系统中产生的图案形成现象。实验采用钛、SCM、SUS、S45C作为轧辊材料，根据易磨损材料、硬质材料和软质材料等材料特性选择性地发生垂直和水平振动，观察花纹现象长大的过程。该结果对热矫直辊多边形磨损装置的设置有很大帮助。 3.进行了实验以确认直流电机中产生的闪络现象。然而，该图案似乎在增长，但在增长。期间停止实验进行到一半，所以闪络尚未得到证实，因此我们再次进行了基础实验，并重新开始分析，因为很清楚旋转体的固有频率对图案形成有影响，因为实验之间存在分歧。根据以下几点得出理论结果，将检查直流电机中产生的电力： (1) 实际机器中换向器上出现的四个多边形图案在分析结果中并不罕见。 (2) 的产生。只是实机上连多边形变形都不能4.将造纸机多级压光辊系统中产生的不稳定振动视为图案形成现象，进行了分析，证实了图案形成的实验结果与分析结果吻合良好。 5．对炼钢机热矫直机轧辊的多边形磨损进行了分析。多边形磨损分析模型近期将提出轧辊多边形磨损的延迟对策，详细分析将继续进行。