Direct observation of rolling interface of metal sheet by CCD Camera embedded into a roll and a study of lubrication mechanism

轧辊内嵌CCD相机直接观察金属板轧制界面及润滑机理研究

基本信息

项目摘要

A new rolling equipment for direct observation of rolling interface is developed. Into the upper roll of 157 mm in diameter of a two-high mill, a CCD camera with a macro lens is co-axially embedded. A transparent glass block preliminarily ground so as to match the curvature of the roll is also embedded in a radial direction. The two orthogonal axs are optically connected by a mirror locating on the roll axis. Signals are acquired through a slip-ring equipped at the edge of the roll. A digital video recorder enabled stabilized acquisition of images for over a minute at a rate of 30 images per second. Paraffinic base oils with varied viscosity were used as lubricants. A pure aluminium sheet of 2 mm thick and 40 mm width is rolled at a reduction of 5,10 or 15% at a rolling speed of 0.167m/s. The results are summarized as follows :(1) At the roll bite, a contrast connected with the thickness of the oil film is visible. The shape of the dark part (which is supposed to be the microscopic valleys of the sheet) is rich in the component parallel to the rolling direction.(2) At the exit of roll bite dendritic structure of the lubricant becomes more clear and parallel to the rolling axis. This is probably caused by the emission of a pressurized high-viscosity lubricant to the free space.(3) The lubricant staying on the glass tool shows relaxation as time passes. Thus, the dynamic behavior of lubricant viscosity should be taken into consideration in relation to the plasto-hydrodynamic lubrication.(4) Mirror finished sheets also showed similar lubricant behavior as the roll mill finished sheets. Another specimen with artifical microscopic cavities prepared by coining showed that the high viscous dendritic structure occurred through bearing areas.
研制了一种直接观察轧制界面的轧制装置。在两辊轧机的直径为157 mm的上辊中,同轴地嵌入具有微距透镜的CCD照相机。还沿径向嵌入了预先研磨以与辊的曲率相匹配的透明玻璃块。两个正交轴通过位于滚动轴上的反射镜光学连接。信号是通过安装在轧辊边缘的滑环采集的。数字录像机能够以每秒30幅图像的速度稳定采集图像超过一分钟。具有不同粘度的石蜡基油用作润滑剂。在0.167m/s的轧制速度下,以5%、10%或15%的压下率轧制2 mm厚、40 mm宽的纯铝板。结果表明:(1)在轧辊咬入处,存在与油膜厚度有关的反差。暗部的形状(被认为是板的微观谷)富含平行于轧制方向的分量。(2)在轧辊咬入出口处,润滑剂的枝晶结构变得更加清晰,且与轧制轴线平行。这可能是由于加压的高粘度润滑剂排放到自由空间造成的。(3)停留在玻璃工具上的润滑剂随着时间的推移而显示松弛。因此,润滑剂粘度的动态行为应考虑到与塑性流体动力润滑。(4)镜面成品板也显示出与辊轧机成品板类似的润滑剂行为。另一个通过模压制备的具有人工微观空腔的试样表明,高粘性树枝状结构发生在轴承区域。

项目成果

期刊论文数量(5)
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池 浩・辻 邦夫・高瀬 誠: "板圧延界面の直接観察による潤滑剤の挙動の考察(第2報)" 平成10年度塑性加工春季講演会講演論文集. (印刷中). (1998)
Hiroshi Ike、Kunio Tsuji 和 Makoto Takase:“通过直接观察板材滚动界面来考虑润滑剂的行为(第二份报告)”1998 年春季塑料加工会议论文集(1998 年)。
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池 浩・辻 邦夫・高瀬 誠: "板圧延界面の直接観察による潤滑剤の挙動の考察" 第48回塑性加工連合講演会講演論文集. 315-316 (1997)
Hiroshi Ike、Kunio Tsuji 和 Makoto Takase:“通过直接观察板材滚动界面来考虑润滑剂的行为”第 48 届塑料工作联盟会议记录(315-316)(1997 年)。
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IKE Hiroshi其他文献

IKE Hiroshi的其他文献

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{{ truncateString('IKE Hiroshi', 18)}}的其他基金

Creation of function of information transmission by micro-metalforming of surface microgeometry utilizing technology of plasticity
利用塑性技术通过表面微观几何形状的微金属成形创造信息传输功能
  • 批准号:
    16560643
  • 财政年份:
    2004
  • 资助金额:
    $ 1.41万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Nanoscopic replication mechanism of surface microgeometry in technology of plasticity.
可塑性技术中表面微观几何形状的纳米复制机制。
  • 批准号:
    12650729
  • 财政年份:
    2000
  • 资助金额:
    $ 1.41万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Nanoscopic study and application of tribo-plastic deformation mechanism
摩擦塑性变形机制的纳米研究及应用
  • 批准号:
    10650725
  • 财政年份:
    1998
  • 资助金额:
    $ 1.41万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
STUDY ON DESIGNING 3-D CONTROLLED SURFACE MICROGEOMETRY OF WORKPIECE IN METALWORKING.
金属加工工件 3D 控制表面微观几何设计的研究。
  • 批准号:
    02650502
  • 财政年份:
    1990
  • 资助金额:
    $ 1.41万
  • 项目类别:
    Grant-in-Aid for General Scientific Research (C)

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