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1. 发明专利

JPS60260807A RADIATION TRANSMISSION TYPE MEASURING INSTRUMENT FOR WALL THICKNESS OF TUBULAR MATERIAL 失效
公开(公告)号：JPS60260807A
公开(公告)日：1985-12-24
申请号：JP11764084
申请日：1984-06-08
申请人： KAWASAKI STEEL CO , FUJI ELECTRIC CO LTD
发明人： KONYA NORIO , FUNIYUU YUTAKA , OKUMURA KIYOSHI , SHIMIZU MASAMI , MATSUSHITA SHIGETADA , MONNO ASAO
IPC分类号： G01B15/02
摘要： PURPOSE:To prevent the generation of a misalignment error in the measurement result of wall thickness by subjecting the curve connecting the quantity of the radiations detected from each radiation detector to function approximation and measuring the wall thickness from the max. value thereof. CONSTITUTION:A single radiation source 12 and plural radiation detectors 14A- 14G are positioned to face each other with a tubular material 10 in-between in such a manner that the radiation source 12 is held equidistant from the detectors 14A-14G. The curve connecting the quantity of the radiations detected by the detectors 14A-14G is subjected to the function approximation and the wall thickness on the straight line connecting the source 12 with the axial center of the tubular material 10 is measured from the max. value thereof. The generation of the misalignment error in the measurement result of the wall thickness is thus prevented even if the misalignment arises in the material 10 under conveyance.

2. 发明专利

JPS6021114A METHOD FOR CONTROLLING WALL THICKNESS OF STEEL PIPE WITH REDUCING MILL 失效
公开(公告)号：JPS6021114A
公开(公告)日：1985-02-02
申请号：JP12935083
申请日：1983-07-18
申请人： KAWASAKI STEEL CO
发明人： OOTA RIYOUICHI , OKUMURA KIYOSHI , FUNIYUU YUTAKA
IPC分类号： B21B37/78 , B21B37/12
摘要： PURPOSE:To enable production of a rolled pipe having a specified wall thickness by controlling a reducing mill in accordance with the required elongation rate calculated from the actually measured values of the weight of a blank material and the length of a base pipe and the elongation determined from a rolling schedule. CONSTITUTION:The relation between the required elongation rate in a reducing mill 6 consisting of plural roll stands and the controlled variable for the revolution pattern of the rolls of the entire roll stand is predetermined for every elongation which is the ratio in the sectional area of a rolled pipe 7 between the inlet side and outlet side of the mill 6. On the other hand, the weight of a blank material 1 and the length of a base pipe 4 after working with a mandrel mill 3 are respectively actually measured by a device 2 for measuring weight and a device 5 for measuring length and the required elongation rate for reduction is calculated from such actually measured values and the weight of the command blank material and the weight of the command base material in the same lot. The controlled variable for the revolution pattern of the rolls in the reduction is determined by a calculator 9 for control in accordance with said elongation and the required elongation rate and the rotating speed of the rolls of each roll stand provided to the mill 6 is automatically controlled.

3. 发明专利

JPS58119416A METHOD FOR CONTROLLING WALL THICKNESS OF SEAMLESS PIPE 失效
公开(公告)号：JPS58119416A
公开(公告)日：1983-07-15
申请号：JP239282
申请日：1982-01-11
申请人： KAWASAKI STEEL CO
发明人： HAYASHI YASUYUKI , OKUMURA KIYOSHI
IPC分类号： B21B19/04 , B21B17/04 , B21B17/14 , B21B37/18 , B21B37/78
摘要： PURPOSE:To make easily and surely the wall thickness distribution in the longitudinal direction of a seamless pipe uniform by controlling a piercer, by obtaining the target wall thickness distribution in the longitudinal direction of a pipe obtained after piercing, required to make the wall thickness distribution of a roll-finished pipe at the exit side of a stretch reducer uniform. CONSTITUTION:As a blank material, a round steel bar 10 is continuously heated in a rotary hearth type heating furnace 12, and after piercing it by a piercing mill 14, the pierced blank pipe is stretched by a mandrel mill 20 and is successively drawn by a stretch reducer 26 after being reheated in a reheating furnace 24. In such a method of the wall thickness controlling of a seamless pipe, the wall thickness distribution of a roll-finished pipe 28 at the exit side of the reducer 26 is previously estimated to obtain the target wall thickness distribution in the longitudinal direction of the hollow rough blank pipe 16 obtained after piercing, required to make said estimated wall thickness distribution uniform. Then, the piercing conditions of piercer 14 is controlled so as to obtain said target wall thickness distribution.

4. 发明专利

JPS5712307A MEASURING METHOD FOR THICKNESS OF TUBULAR MATERIAL 失效
公开(公告)号：JPS5712307A
公开(公告)日：1982-01-22
申请号：JP8521380
申请日：1980-06-25
申请人： KAWASAKI STEEL CO , FUJI ELECTRIC CO LTD
发明人： FUNAFU YUTAKA , OKUMURA KIYOSHI , MONNO ASAO , SHIMIZU MASAMI
IPC分类号： G01B15/02
摘要： PURPOSE:To realize a contactless measurement of thickness of a tubular material, by irradiating the radioactive rays having a prescribed beam width to the tubular material and then obtaining the function approximation curve of the nearby measuring region including two spots where the effect begins to emerge for both the outer side thickness and the inner diameter of hollow part of the tubular material. CONSTITUTION:A pulley 10 or 10a which winds up a wire 11 bonded to a frame 9 is turned by a drive motor 12, and thus the frame 9 meves horizontally to give a horizontal scan in the crossing direction of a pipe 1 to a station system comprising a beam source 3 and a detector that detects the rediation beam 2 sent from the source 3. The position of the station system during the scan is detected by a scale 13 and then displayed on a scale display device 14. In addition, the following circuits are provided: a counter 17 that counts the volume of detection of a radiation beam detector 4, latching circuits 15 and 16, a CPU18, a motor driving circuit 19, a clock generating source 22, the 1st dividing circuit 23 and the 2nd dividing circuit 24 respectively.

5. 发明专利

JPH049607A ULTRASONIC FLAW DETECTING METHOD FOR INSIDE OF PIPE 失效
公开(公告)号：JPH049607A
公开(公告)日：1992-01-14
申请号：JP10972290
申请日：1990-04-25
申请人： KAWASAKI STEEL CO
发明人： KONDO HIROAKI , OKUMURA KIYOSHI , ARATAMA MIKIO
IPC分类号： G01B17/02
摘要： PURPOSE:To highly accurately detect the remarkably deviated inside thickness or a flaw of the inside of a thick pipe by applying a required time axis gate to an ultrasonic wave echo received from the thick pipe. CONSTITUTION:An array type probe 3 having plural oscillators along the longitudinal direction of a pipe material 1 is arranged, and when ultrasonic waves are successively made incident upon the center of the pipe 1 vertically to the pipe 1 and the material 1 is scanned with ultrasonic synthetic beams in its longitudinal direction, ultrasonic echoes from an inside recessed part or the like in which a reflected ultrasonic echo is weak in the pipe 1 is amplified and the defect can be detected. In the case of ultrasonic echoes from a thick pipe, a gate is formed between an echo from the surface of the pipe and the 1st original echo B1 from the bottom or between the echo B1 and the 2nd original echo b2 and a remarkably deviated thickness defect in the thick pipe can be highly accurately inspected by an echo more than a prescribed level in the gate.

6. 发明专利

JPS62124861A SAMPLING CONTROL METHOD IN PRODUCTION LINE 失效
公开(公告)号：JPS62124861A
公开(公告)日：1987-06-06
申请号：JP26507385
申请日：1985-11-27
申请人： KAWASAKI STEEL CO
发明人： OKUMURA KIYOSHI , OKA HIROSHI
IPC分类号： B23Q41/00 , B21B37/00 , B23Q41/02 , B23Q41/08 , B65G1/00 , B65G1/137 , G05B19/418
摘要： PURPOSE:To determine the optimum sampling cycle time by making the arrival time of the next work to the respective input side of all processors equal or larger than the arrival time of the preceding work to the respective output side of the corresponding processor and making the arrival time of the next work and the preceding work equal. CONSTITUTION:If the processing cycle time of each processor differs for each type of a work, the arrival time to the input side of each processor from a sampling device and the arrival time to the output side are determined for each type of the work. The arrival time of the next work to the respective input side of all processors is made equal to larger than the arrival time of the preceding work to the respective output side of the corresponding processor. Therefore, all works can be sampled without delay in any processor of all lines. The arrival time of the next work and the preceding work is made equal in one or more processors, thus all works can be sampled without generating wasteful vacancy in any processor of all lines.

7. 发明专利

JPS60133310A RADIATION-TRANSMITTING TYPE THICKNESS MEASURING APPARATUS OF TUBULAR MATERIAL 失效
公开(公告)号：JPS60133310A
公开(公告)日：1985-07-16
申请号：JP24156083
申请日：1983-12-21
申请人： KAWASAKI STEEL CO , FUJI ELECTRIC CO LTD
发明人： FUNIYUU YUTAKA , OKUMURA KIYOSHI , KONYA NORIO , SHIMIZU MASAMI , MATSUSHITA SHIGETADA , MONNO ASAO
IPC分类号： G01B15/02 , G01B11/02
摘要： PURPOSE:To improve correspondence with a range and measuring accuracy, by constituting an apparatus so that the effective measuring width of a wide radiation beam can be changed in correspondence with the outer diameter of a tubular material, and obtaining the adequate value of the rate of the amount of attenuation with respect to the total amount of radiation. CONSTITUTION:Rods 26A and 26B are turned in correspondence with the diameter D of a tubular material 10. The width of radiation L is adjusted so that the radiation width L of a wide beam 14 is larger than the outer diameter D of the tubular material 10 and the rate of the amount of radiation with respect to the total amount of radiation becomes an adequate value. Then a specified reference sample is inserted in a place in which a material to be measured is entered. After the calibration of a thickness measuring scale, on-line measurement is performed. Thus, the optimum radiation width L corresponding to the outer diameter D of the tubular material 10 and the radiation density in the direction of the width can be obtained. Therefore, the total radiation amount, which is inputted to a radiation detector 30, is made approximately constant regardless of the change in the outer diameter D of the tubular material 10, and the highly accurate measurement can be performed.

8. 发明专利

JPS60127014A CONTROL METHOD OF ELONGATING LENGTH IN DRAWING MILL OF PIPE STOCK 失效
公开(公告)号：JPS60127014A
公开(公告)日：1985-07-06
申请号：JP23407183
申请日：1983-12-12
申请人： KAWASAKI STEEL CO
发明人： OOTA RIYOUICHI , FUNIYUU YUTAKA , OKUMURA KIYOSHI
IPC分类号： B21B17/14 , B21B37/00 , B21B37/70 , B21B37/78
摘要： PURPOSE:To prevent the generation of a material short in length and to enhance the yield of material by reducing the allowance in pipe length and weight, by deciding whether or not the measured weight of a mother pipe or a stock is larger than an instruction weight, in performing a titled control basing on the weight of stock and the measured value of the length of pipe before and after rolling. CONSTITUTION:In a case that the measured weight WBM of a mother pipe or a stock is larger than the instruction weight of said pipe or stock, and the instruction length LT of a rolled pipe is obtained even when the wall-thickness of pipe is made to be an ordinary target value; draw rolling is performed by setting the target length LTA of a rolled pipe, basing on an equation I , so that the wall thickness of rolled pipe is constant. Further, in a case that the weight WBM is less than the weight WB, the lower limit of the wall thickness of rolled pipe is larger than a securable set value, and the length LT can be secured by reducing the wall thickness of rolled pipe; the draw rolling is performed basing on, for instance, an equation II. Furthermore, in a case that the weight WBM is less than said set value and the length LT can not be secured even when the wall thickness of rolled pipe is reduced; the draw rolling is performed by setting the length LTA basing on the equation I so that the wall thickness of rolled pipe is constant.

9. 发明专利

JPS58107203A MANDREL MILL ROLLING METHOD 失效
公开(公告)号：JPS58107203A
公开(公告)日：1983-06-25
申请号：JP20590881
申请日：1981-12-18
申请人： KAWASAKI STEEL CO
发明人： OKUMURA KIYOSHI , SASAKI SHINZOU
IPC分类号： B21B17/02 , B21B25/04
摘要： PURPOSE:To stability rolling and to economize consumption of lubricants by controlling the flow rate of the lubricant to be coated on a mandrel bar in accordance with the longitudinal temp. distributions of the mandrel bar to be inserted into a hollow blank pipe. CONSTITUTION:In the stage of producing seamless steel pipes, a surface thermometer 50 is disposed in front of the nozzle 36a of a lubricator 36 for coating lubricants on a mandrel bar 18, and the temp. distributions in the longitudinal direction of the bar 18 are measured therewith. The output of the thermometer 50 is fed to a control device 54 which controls the flow rate and concn. of the lubricant to be sprayed from the nozzle 36a in accordance with the surface temp. of the bar 18. The bar 18 coated adequately with the lubricant is inserted into a hollow blank pipe 16, and is fed to a mandrel mill 20, by which the pipe is subjected to drawing. In this way, the stability of rolling is improved, and uneven coating of the lubricants and the loss of the lubricants are prevented.

10. 发明专利

JPS579835A METHOD AND DEVICE FOR TEMPERATURE CONTROLLING OF CONTINUOUS HEATING FURNACE 失效
公开(公告)号：JPS579835A
公开(公告)日：1982-01-19
申请号：JP8250580
申请日：1980-06-18
申请人： KAWASAKI STEEL CO
发明人： OKUMURA KIYOSHI
IPC分类号： C21D9/08 , C21D9/00 , C21D11/00
摘要： PURPOSE:To heat materials to be heated uniformly over the entire length thereof by controlling the temps. in a heating furnace to target values from the data on the areas where the respective long-sized materials to be heated reside in the furnace and the data on surface temp. distributions. CONSTITUTION:After respective materials 12 to be heated are measured of lengths by a pulse generator 26, and detectors 28, 30 for the tip and trailing ends of the materials 12, they are inserted into a heating furnace 10. A control computer 18 controls a driving motor 24 based on length data, stops the materials 12 at the center of the furnace, and stores the data on the areas where they reside in the furnace. These data are shifted in the computer 18 according to the advance of the materials 12 by each one pitch by movable beams. The materials 12 extracted from the furnace 10 are measured of their surface temp. distributions by a radiation thermometer 32 and the data thereof are supplied to the computer 18. The computer 18 operates the optimum temp. set values of each of heating zones 10a-10c from the in-furnace residence data and the temp. distribution data, and controls respective control valves 14a-14c via temp. controllers 16a-16c, thereby correcting the inside of the furnace 10 to optimum temps.

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