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    • 2. 发明专利
    • BENDING ROLL
    • JP2002066640A
    • 2002-03-05
    • JP2000249711
    • 2000-08-21
    • NIPPON STEEL CORP
    • ISHIBASHI HIROONAMIENO TSUTOMU
    • B21D5/14
    • PROBLEM TO BE SOLVED: To provide a bending roll capable of preventing a barreled deformation of the pipe generated at the time of a roll bending work and producing a long steel pipe with a small diameter. SOLUTION: An apparatus to produce the pipe through the bending work by driving each roll of two or three bending rolls 2A, 2B provided coutacllessly in the vicinity of a core roll 1, with a metallic plate 6 fed in between the bending rolls, is provided with a back up roll 3 provided so as to pressure contact the core roll 1 to counteract a reaction force affecting the core roll 1 by the metallic plate 6 at the time of bending said plate 6, a detecting means 5 to detect the top end position and the thickness of the metallic plate 6 on the core roll 1, a moving means 4 which maintains the evacuation position till the end of the roll bending by evacuating the back up roll 3 only by the thickness of the metallic plate 6 before the metallic plate 6 is engaged between the back up roll 3 and the core roll 1 based on the detecting means 5 are provided.
    • 5. 发明专利
    • METHOD FOR PREPROCESSING IMAGE
    • JPH0518855A
    • 1993-01-26
    • JP19710291
    • 1991-07-11
    • NIPPON STEEL CORP
    • TSUDA NOBUHISAMATSUMOTO MITSUONAMIENO TSUTOMU
    • G01M10/00G01M9/00G01P5/20G01P13/00G06T5/20H04N1/40H04N1/409
    • PURPOSE:To calculate the center of gravity with high accuracy by emphasizing the density of an image and clearing the contour thereof by calculating the difference between the two-dimensional averaged image of the original image and the two-dimensional Laplacian image thereof. CONSTITUTION:The beam from argon laser 1 generates Doppler effect by the ultrasonic waves in an acousto-optical cell 2 and the unidimensional beam of the obtained scattering beam enters an optical fiber 3. The beam from the fiber 3 passes through a pinhole 4 and an optical lens 5 to form a laser sheet 1A to irradiate a container 6. The scattering beam of the nylon tracer particles in the container 6 is stored in a recording and regenerating device 8 through a TV camera 7 and confirmed at the time of storing by a TV monitor 9. The image data thus obtained is regenerated by the device 8 to be processed by a computer. That is, an image Z of a positive pixel value is averaged to obtain an averaged image Z' and Laplacian DELTAZ' is taken with respect to the image Z. The positive part of the difference between the image Z' and DELTAZ' is taken out. Density is emphasized with respect to the original image Z to obtain an image having a clear contour of a particle. Since the contour of the particle image is clear, center-of-gravity coordinates are accurately calculated.
    • 6. 发明专利
    • INTERPOLATING OF LATTICE POINT OF FLOW FIELD DATA
    • JPH04174362A
    • 1992-06-22
    • JP30047390
    • 1990-11-06
    • NIPPON STEEL CORP
    • TSUDA NOBUHISANAMIENO TSUTOMUKOTANI HIDEO
    • G01P13/00G01M10/00
    • PURPOSE:To make it possible to calculate a stream function of a flow field in a short time by a method wherein the velocities of all combinations obtained by taking three flow velocity data out of three or more of them at measuring points in the vicinity of a grid point for which interpolation is to be made, are calculated by a specific formula, a statistical processing is executed and thereby an approximate flow velocity is obtained. CONSTITUTION:An array of grid points is prepared in an area to be analyzed and flow velocity data in the number of (n) at flow velocity measuring points K, L, M, N... within a prescribed range from a grid point G for which interpolation is to be made are extracted. Then, interpolating computation of the data at the grid point is executed by using one set of combinations of nC3 sorts in all obtained by taking three out of the data in the number of (n). Herein interpolation data (u) are obtained by a formula wherein a flow velocity (vector) at the grid point G is denoted by (u). In the formula, (dx)K, (dy)K, (dx)L, (dy)L, (dx)M and (dy)M denote distances between the measuring points and the grid point G, du/dx and du/dy denote a velocity gradient at the grid point G and uK, uL and uM denote the flow velocity data. In the same way, interpolation data in the number of nC3 are determined, a statistical processing is executed and thereby a median is calculated. By executing such a processing as the above for all the grid points in the interpolation area, a stream function of a flow field can be calculated in a short time.
    • 7. 发明专利
    • VISUALIZING METHOD FOR FLOW BY IMAGE PROCESSING
    • JPH0450745A
    • 1992-02-19
    • JP16037290
    • 1990-06-19
    • NIPPON STEEL CORP
    • TSUDA NOBUHISAKOBAYASHI TOSHIONAMIENO TSUTOMU
    • G01M10/00
    • PURPOSE:To visualize a flow area by mixing particles of specific size with fluid, extracting a processing continuous field information from image information generated by the video recording of scattered light and fluorescent light by light irradiation, and correcting the spatial deviation between even and odd fields of the information. CONSTITUTION:Th particles of 10mum - 2mm size which follow up a flow of water in an acryl-made container 5 are fed continuously from the top surface of the container 5 and section which needs to be visualized is irradiated continuously with the argon laser light from a light beam lens 4 in a light sheet state; and its image is picked up by a CCD camera 8 at right angles to a laser sheet surface 1A and video-recorded. This information is reproduced, and the frame information is divided into field information by the odd and even fields, and recorded in a storage device after the scanning line deviation between the both is corrected in both the travel and vertical directions. Consequently, the flow are can be visualized at a time.
    • 10. 发明专利
    • Cooling method of galvanizing bath
    • 冷却浴的冷却方法
    • JPS6187858A
    • 1986-05-06
    • JP20832184
    • 1984-10-05
    • Nippon Steel Corp
    • TSUTSUMI MASAYANAMIENO TSUTOMUSHIMA TETSUOKOJIMA KOJI
    • C23C2/26C23C2/00
    • C23C2/003
    • PURPOSE:To cool efficiently a plating bath and to execute plating with excellent wettability by measuring the temp. of a cooling vessel provided above a galvanizing bath, estimating the thickness of the solidified layer of the plating metal adhered to the vessel and controlling the flow rate of cooling water. CONSTITUTION:The cooling water 15 is introduced into the cooling vessel 11 provided on the plating bath 7 in a pot 4 provided with a pot heater 10 to cool the bath 7 so that the bath is maintained at the temp. to provide the good wettability of the plating metal and a steel plate 2 in the method for executing galvanizing by passing continuously the steel plate 2 of a high temp. through a snout 8 into the plating bath 7. The temp. of the vessel 11 in contact with the plating bath 7 is measured by a thermocouple 12 embedded in the bottom of the vessel 11 and the thickness (t) of the solidified zinc layer formed on the vessel 11 is estimated by an arithmetic unit 16 from the measured valve thereof in the above-mentioned method. A valve 14 is regulated to control the supply rate of the above-mentioned cooling water 15 so that the thickness (t) is maintained within the prescribed range.
    • 目的:为了有效地冷却电镀浴,并通过测量温度来执行具有优异润湿性的电镀。 设置在镀锌浴上方的冷却容器,估计附着在容器上的电镀金属的固化层的厚度并控制冷却水的流量。 构成:在设置有锅加热器10的锅4中将冷却水15引入设置在镀浴7上的冷却容器11中,以冷却浴7,使得浴保持在温度。 为了通过使高温钢板2连续通过,进行镀锌的方法中,电镀金属和钢板2的润湿性良好。 通过鼻子8进入镀浴7。 通过嵌入在容器11的底部的热电偶12测量容器11与电镀槽7接触的厚度(t),并且通过运算单元16从容器11的 在上述方法中测量阀。 调节阀14以控制上述冷却水15的供给速度,使得厚度(t)保持在规定范围内。