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1. 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.

2. 发明专利

JPS58110108A STRETCH REDUCING METHOD FOR SEAMLESS PIPE 失效
公开(公告)号：JPS58110108A
公开(公告)日：1983-06-30
申请号：JP21182281
申请日：1981-12-24
申请人： KAWASAKI STEEL CO
发明人： SASAKI SHINZOU , OOTA RIYOUICHI
IPC分类号： B21B37/74 , B21B17/14 , B21B37/78
摘要： PURPOSE:To prevent surely the out-of-tolereance in the outside diameter of products, by detecting the hot finish outside diameter and temp. of a finish rolled pipe at the outlet of hot stretch reducers and controlling the temp. of a reheating furnace by using a model for prediction of temp. drop. CONSTITUTION:A base pipe 22 obtained by working a round billet 10 with a piercer 14, a mandrel mill 20, etc. is reheated in a reheating furnace 24 and is stretch-reduced with a hot stretch reducer 26, whereby a finish rolled pipe 28 having a target outside diameter is obtained. In a control device 38, the hot finish outside diameter and temp. of the base pipe at the final finishing stand are determined in accordance with the detected values D0 of the hot outside diameter and temp. of the finish rolled pipe 28 on the outlet side of said hot stretch reducer 26, and further from a coefft. eta of thermal expansion, a cold finish outside diameter and a target hot finishing temp. are determined and the rate of temp. drop during stretch reducing is predicated in accordance with a model, whereby the target temp. on the inlet side of the reducer 26 is determined and the set temp. TF of the furnace 24 is controlled.

3. 发明专利

JPS5888611A AUTOMATIC HIGH-SPEED GAIN CONTROL CIRCUIT 失效
公开(公告)号：JPS5888611A
公开(公告)日：1983-05-26
申请号：JP18796581
申请日：1981-11-24
申请人： KAWASAKI STEEL CO , TOKYO OPTICAL
发明人： OOTA RIYOUICHI , FUNIYUU YUTAKA , OKUMURA KIYOSHI , WATANABE AKIRA , WAKE MICHIO , KOBAYASHI MASAKI , KIKUTA TAKEJI
IPC分类号： G01B11/08 , G01B7/12 , G01B21/12 , G05B11/00
摘要： PURPOSE:To increase a response speed by forming a feed-forward system in an AGC circuit used for an optical scan system diameter measuring device, and controlling the output of a variable control circuit constantly by a control signal corresponding to the level of an input signal. CONSTITUTION:Through a slicing circuit 14, comparator 16, delay circuit 18, and timer 19, a sampling signal S6 is obtained being delayed a specified time behind a rise of an input signal S1, and at this timing, a sample holding circuit 21 holds the input signal S1(S7). On the other hand, a nonlinear circuit 22, reference voltage source 24, and adder 23 generate a nonlinear correcting signal S10 and a variable control circuit 4 is controlled by the correcting signal S10 so that the level of an output signal S12 based upon the input signal S1 is held constant. The signal S10 is nonlinear corresponding to the input voltage-gate voltage characteristics of the FET of a control circuit 4. While the input S1 is absent, a gate 6 is closed to prevent the influence of external noise.

4. 发明专利

JPS60174207A METHOD FOR MEASURING INTERSTAND TENSION OF STEEL-PIPE DRAWING MILL 失效
公开(公告)号：JPS60174207A
公开(公告)日：1985-09-07
申请号：JP2799984
申请日：1984-02-18
申请人： KAWASAKI STEEL CO
发明人： OOTA RIYOUICHI , FUNIYUU YUTAKA , KANAZAWA MASAZUMI
IPC分类号： B21B37/48 , B21B17/14 , B21B37/00 , B21B37/78 , B21B38/06
摘要： PURPOSE:To measure accurately an interstand tension by installing a load detector between a mill stand and a roll stand and measuring the stress in the rolling direction of roll stand and that of an adjoining stand respectively. CONSTITUTION:A steel pipe is drawn by a mill stand formed by continuously arranging plural roll stands. Load detectors 17 of shearing type are incorporated in the upper and lower rails 15, 16 of the mill stand, to transmit a force acting between the rails 15, 16 through the detectors 17. Accordingly, a stress in the rolling direction acting on a roll stand 12 can be measured. The detectors 17 are continuously arranged from the 1st stand at the inlet side of drawing mill, to measure a stress in the rolling direction of an adjoining stand. Further, the interstand tension is accurately calculated based on the boundary conditions between these mutual stands.

5. 发明专利

JPS58173010A CONTROLLING METHOD OF WALL THICKNESS IN STRETCH REDUCING MILL FOR STEEL PIPE 失效
公开(公告)号：JPS58173010A
公开(公告)日：1983-10-11
申请号：JP5391182
申请日：1982-04-02
申请人： KAWASAKI STEEL CO
发明人： OOTA RIYOUICHI , IMAE TOSHIO , SASAKI SHINZOU
IPC分类号： B21B17/14 , B21B37/18 , B21B37/48 , B21B37/78
摘要： PURPOSE:To make the wall thickness of a blank pipe uniform by controlling the tension between stands, by detecting the bulge-width at the time of stretch- reducing, and controlling the peripheral speed of a roll at each stand basing on the distribution of the bulge-width of the pipe in the longitudinal direction. CONSTITUTION:In a mandrel mill, the distribution of bulge-width in the longitudinal direction, detected by a bulge-width detecting device 11 at the time of elongator-rolling, is transmitted to a bulge-width recording device 12 and then is stored in a host arithmetic device 13. The device 13 calculates to obtain a roll- peripheral-speed controlling pattern in accordance with a calculating formula basing on the distribution of the bulge-width in the longitudinal direction. Then in stretch-reducing a blank pipe by a stretch reducer 14, a driving motor at each stand is controlled in accordance with the calculated controlling pattern of the peripheral speed of a roll through a drive-controlling device 15.

6. 发明专利

JPS58109804A OPTICAL SCANNER 失效
公开(公告)号：JPS58109804A
公开(公告)日：1983-06-30
申请号：JP20880481
申请日：1981-12-23
申请人： KAWASAKI STEEL CO , TOKYO OPTICAL
发明人： OOTA RIYOUICHI , OKUMURA KIYOSHI , WATANABE AKIRA , WAKE MICHIO , KOBAYASHI MASAKI , KIKUTA TAKEJI , MIZUIDE KATSUYA
IPC分类号： G01B11/00 , G01B11/02 , G01B11/08 , G01B11/24 , G01B11/245
摘要： PURPOSE:To obtain a miniaturized optical scanner which is capable of measuring with high accuracy, by providing a turning slit device, a projecting optical system of an object to be scanned and plural photoelectric transducers. CONSTITUTION:An edge part 6 of an object to be scanned and upper surface 8 of a rotary drum 4 are conjugate with each other in terms of a projection lens 30. At the same time, the lens 30 and a photoelectric transducer 22 are conjugate with each other in terms of a relay lens 38. Furthermore the other edge 12 of the object to be scanned and the lower surface 14 of the drum 4 are conjugate with each other in terms of a projection lens 34, and at the same time the lens 34 and a photoelectric transducer 26 are conjugate with each other in terms of a relay lens 44. When the drum 4 is rotated toward an arrow A, the edges 6 and 12 are scanned in the directions of arrows B and C respectively. Therefore the scanning luminous flux due to optical systems 10 and 16 scans the object to be scanned as it held the object at both sides. As a result, a shift of the scanning period is virtually eliminated between the edges 6 and 12. Thus, an accurate measurement is performed.

7. 发明专利

JPS60234710A METHOD FOR CONTROLLING NUMBER OF REVOLUTION OF ROLL OF STRETCH REDUCER FOR STEEL PIPE 失效
公开(公告)号：JPS60234710A
公开(公告)日：1985-11-21
申请号：JP9024484
申请日：1984-05-08
申请人： KAWASAKI STEEL CO
发明人： OOTA RIYOUICHI , FUNIYUU YUTAKA
IPC分类号： B21B17/14 , B21B37/00 , B21B37/48 , B21B37/52 , B21B37/78
摘要： PURPOSE:To improve additionally not only the size of a roll finished pipe but also the sectional shape thereof by enabling theoretical setting of the number of revolutions of each stand according to the actually measured tension between stands and enabling control of the pattern for distribution tension to each of the stands. CONSTITUTION:The initial pattern for the reference number of revolutions is calculated by the predicted tension coefft. ZAi from the outside diameter and wall thickness of a base pipe and the outside diameter and wall thickness of the roll finished pipe 5. The number of revolutions of the rolls is set for each of the roll stands 7 and the base pipe is subjected to stretch reducing. The tension Ti between the stands 7 during rolling is actually measured by a tension measuring device 21 via a load detector 12 and is inputted to a calculator 22 for control with a hot stretch reducer 4. The calculator 22 calculates the coefft. Zi of the actually measured tension of each stand 7 according to the actually measured tension Ti and corrects the pattern for the number of revolutions of the rolls by learning according to the deviation between both coeffts. ZAi and Zi. The control of the number of revolutions of the rolls with high accuracy is thus made possible.

8. 发明专利

JPS60137516A METHOD OF CONTROLLING THICKNESS OF TUBE STOCK IN PIERCING ROLLING MILL 失效
公开(公告)号：JPS60137516A
公开(公告)日：1985-07-22
申请号：JP24711183
申请日：1983-12-26
申请人： KAWASAKI STEEL CO
发明人： OOTA RIYOUICHI
IPC分类号： B21B19/04 , B21B37/18 , B21B37/78
摘要： PURPOSE:To prevent abnormal thickness and to reduce dispersion in length or thickness of tube stocks by learning and controlling the amount of advance of a piercing plug basing on the actual thickness or correction term when rolling the next material at each plug bar. CONSTITUTION:The density of a hollow 18 is calculated from estimated temperature of the hollow 18 in an exit side of a piercer 11 and the targer length of the hollow is calculated from the weight of a billet measured beforehand by a billet weight measuring device 30 from instructed hollow thickness, instructed hollow outer diameter. Then, the actual hollow thickness is determined using the actually measured hollow length lj measured by a hollow length measuring device 32 and the actual hollow outer diameter Dj measured by a hollow outer diameter measuring device 34. Then, the actual hollow thickness correction term is calculated and stored. When rolling the next material, learned controlsetting goege and lead are calculated from the actual hollow thickness correction term. After changing plug diameter, first rolling is completed, and when rolling of third time and later, the optimum learned control setting gorge and lead are set at each plug bar 16, and learned control is performed.

9. 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.

10. 发明专利

JPS58116917A THICKNESS CONTROLLING METHOD OF SEAMLESS PIPE 失效
公开(公告)号：JPS58116917A
公开(公告)日：1983-07-12
申请号：JP21501881
申请日：1981-12-28
申请人： KAWASAKI STEEL CO
发明人： OOTA RIYOUICHI , HAYASHI YASUYUKI , FUNIYUU YUTAKA
IPC分类号： B21B19/04 , B21B17/04 , B21B37/18 , B21B37/78
摘要： PURPOSE:To make thickness distribution in longitudinal direction of a seamless pipe after elongation surely uniform by controlling a piercer from bulge width distribution in longitudinal direction of a mandrel mill that elongates a hollow blank pipe pierced by a piercer. CONSTITUTION:In a mandrel mill 20 that manufactures a seamless pipe using a mandrel bar 18 and plural rolls 20a from a hollow blank pipe 16 obtained by piercing by a piercer 14 using a piercing plug mandrel 14b, the piercer 14 is controlled by a controlling device 32 through a plug positioning device 14d and a working roll clearance fixing device 14e to obtain target thcikness distribution in longitudinal direction of the pipe after percing basing on bulge width distribution in longitudinal direction of the blank pipe 16 during rolling obtained by measuring with a photoelectric bulge width meter 30 provided on the intermediate stand or by guessing from the rolling load in a proper stand.

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