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1. 发明专利

JPH08206818A HOLDING VESSEL FOR MOLTEN METAL INDUCTION HEATING APPARATUS 失效
公开(公告)号：JPH08206818A
公开(公告)日：1996-08-13
申请号：JP10106695
申请日：1995-04-25
申请人： NIPPON STEEL CORP
发明人： UMETSU KENJI , UEYAMA KOJI , TAKAHASHI KEIICHI
IPC分类号： H05B6/10 , B22D11/10 , B22D41/01 , F27B14/06 , F27D11/06
摘要： PURPOSE: To efficiently stir molten metal while heating by connecting with a molten metal vessel and applying tapered angle and elevation angle to the flowing direction of the molten metal in a tubular flowing passage crossed with an AC electromagnet. CONSTITUTION: In a refractory-made rectangular block-shaped vessel body 7 covering the outer surface with an iron shell, two molten metal vessel 2 for storing the molten metal 3 are arranged in some interval, and two flowing passages 1 connecting with between these molten metal vessels 2 are formed at the bottom part side of the vessels. Then, a coil 5 crossed with one closed circuit formed by bringing the molten metal vessels 2 into contact with the flowing passages 1, is constituted by arranging the AC electromagnet composed of an iron core 4. Further, the tapered angles are given in the flowing passage 1 contacting with between the molten metal vessels 2 so that the cross sectional area of the flowing passage continuously changes from one side of the molten metal vessel toward the other side of the molten metal vessel, or the tapered angle and the elevation angle in the flowing passage are applied in the same direction to the arbitrary advancing direction in the closed circuit constituted with the molten metal vessel and the flowing passage. By this constitution, not only the heating, but also the stirring force are added by an electromagnetic induction.

2. 发明专利

JPH07291423A PHYSICAL DISTRIBUTION CONTROL METHOD 失效
公开(公告)号：JPH07291423A
公开(公告)日：1995-11-07
申请号：JP8510894
申请日：1994-04-22
申请人： NIPPON STEEL CORP
发明人： OKAI HARUTOSHI , YANAI HISASHI , UEYAMA KOJI , YAMAMOTO MASANAO
IPC分类号： B23Q41/02 , B65G43/00 , B65G43/08 , B65G61/00 , C21D9/00 , C21D11/00 , G05B13/02 , G05B19/418 , G06Q50/00 , G06Q50/04 , G06F17/60
摘要： PURPOSE:To reduce the stock quantity in the processes by solving the conditional equation as planning the number of material pieces for the next process using the standby conveyance object information and the transport object information for the next process within the specified time while the operations according to the current processes are taking place, and giving a conveyance command to a transportable object with a proper value greater than the specified value. CONSTITUTION:A conveyance objet material information input part 101 for each process acquires the information of the number of object pieces being processed and in standby for the current processes and the conveyance object information conveyable to the next process within the specified time. An object flow control gain calculation part 102 determines the solution which minimizes the evaluation function pertaining to the objects and control command for the next process using a conditional equation for predicting the number of objects for each process at the next time according to the transport command for the next process. An object flow control command value calculation part 103 determines an object flow control command, and an object flow control command value corrective calculation part 104 corrects the conveyance command to '1' if the object is conveyable, and makes correction as the conveyance command 1 for those which have a larger conveyance command value at a bifurcation and junction point of the path.

3. 发明专利

JPH07284827A METHOD FOR SCHEDULING PHYSICAL DISTRIBUTION IN ROLLING MILL 失效
公开(公告)号：JPH07284827A
公开(公告)日：1995-10-31
申请号：JP7843394
申请日：1994-04-18
申请人： NIPPON STEEL CORP
发明人： FUJII AKIRA , OKAI HARUTOSHI , UEYAMA KOJI
IPC分类号： B21B45/00 , B21B37/00 , C21D11/00 , G05B13/02
摘要： PURPOSE:To control the distribution of the rolled slab by determining the optimum rolling order in the hot rolling process and the optimum charging order in heating furnaces. CONSTITUTION:The furnace where the slab is charged, the heating order, and the rolling order in a rolling mill consisting of a plurality of heating furnaces and rolling mills are determined. The system consists of a slab data input part having the function where the attributes of the lab are inputted, a width sorting part to sort the attributes, a rolling constraint matrix calculating part to calculate the rolling conditions according to the attributes, a rolling order solution seeking part having the function to determine the rolling order, a heating furnace constraints calculating part to calculate the constraints to sort the slab whose rolling order is determined to each heating furnace, and a charging furnace solution seeking part having the function where the respective slabs are charged in an appropriate heating furnace to calculate the evaluation function, the optimum solution is sought to determine the charging furnace. An optimum heating furnace is determined while the evaluation variable is changed under the condition that the value of the evaluation variable not to be used in the seeking in the seeking process is not deteriorated over the prescribed numerical value.

4. 发明专利

JPH0724517A RUN-OUT TABLE 失效
公开(公告)号：JPH0724517A
公开(公告)日：1995-01-27
申请号：JP16893793
申请日：1993-07-08
申请人： NIPPON STEEL CORP
发明人： FUJISAKI KEISUKE , WAJIMA KIYOSHI , UMETSU KENJI , UEYAMA KOJI
IPC分类号： B21B39/00 , B21B39/12 , B65H23/192
摘要： PURPOSE:To improve the running property of a steel strip and to prevent flying and waviness by arranging linear motor cores having an electrode each projecting a space between rolls from the lower part to the lower parts of plural rolls extending in the transferring direction. CONSTITUTION:Many transferring rolls 2, 2,... arranged at equal pitch in the transferring direction are driven by motors 301, 302,... at the same speed in the same direction and a linear motor 20 is arranged nearly in its lower part. In the center between the rolls of the transferring rolls 21, 22,..., a. magnetic pole 23 projecting from the lower part vertically from the core 22 of a linear motor 20 is provided and the upper end face is faced with the lower surface steel strip supported by the transferring rolls 21, 22,.... The shifting magnetic filld generated on the upper end face of the magnetic pole 23 gives a thrust in the shifting direction to the steel strip. The number number of frequency of the electric current applied to the linear motor 20 in this time is made lower than of the critical frequency, suction force is actuated to the steel strip, the steel strip is pushed to the rolls 21, 22,..., flying and waviness are restrained the slip of the transferring rolls 21, 22,... is reduced.

5. 发明专利

JPH06313685A AC APPLICATION FOR FLOW CONTROL BY ELECTROMAGNETIC FORCE INDUCED IN MOLTEN METAL 失效
公开(公告)号：JPH06313685A
公开(公告)日：1994-11-08
申请号：JP10082193
申请日：1993-04-27
申请人： NIPPON STEEL CORP
发明人： UMETSU KENJI , UEYAMA KOJI , FUJISAKI KEISUKE , WAJIMA KIYOSHI
IPC分类号： B22D11/10 , B22D11/11 , B22D11/112 , B22D11/115 , B22D11/116 , B22D11/18 , B22D27/02 , C21C7/00 , C21C7/10 , F27D11/06 , F27D19/00 , F27D27/00
摘要： PURPOSE:To efficiently generate electromagnetic force and control the range affected by the force by applying AC to an induction coil for generating the force in molten metal, performing amplitude modulation with the frequency for generating the force as a carrier frequency and the frequency for generating a flow of the metal as that of a signal wave. CONSTITUTION:Molten metal 1 made of conductive liquid is contained in refractory 2, and a nonmagnetic iron sheath 3 and an induction coil 4 are sequentially arranged on the refractory 2. Incidentally, an AC of a predetermined frequency is applied to the coil 4 to generate electromagnetic force in the metal 1, and flow of the metal 1 is controlled. In this case, the AC is set with a frequency for generating the force of a predetermined amplitude in the metal 1 as a carrier frequency. It is subjected to amplitude modulation with a frequency for generating flow of the metal 1 as a signal wave frequency, and applied to the coil 4. Thus, the force can be efficiently generated in the metal 1, and the range affected by the force can be controlled.

6. 发明专利

JPH06304723A METHOD AND DEVICE FOR DIAGNOSING OF QUALITY CONTROL 失效
公开(公告)号：JPH06304723A
公开(公告)日：1994-11-01
申请号：JP11519793
申请日：1993-04-20
申请人： NIPPON STEEL CORP
发明人： OKAI HARUTOSHI , UEYAMA KOJI , NOMURA IKUYO , IZUSHI TAKUO , TSUJI YUICHI
IPC分类号： B22D11/16 , G05B13/02 , G07C3/14 , G07C11/00
摘要： PURPOSE:To improve/maintain the quality control characteristic of process and to prevent degrading thereof by inputting operation data and flaw data into the third neural circuit in parallel at learning of the second nerve circuit and judging the reliability of a quality control device with using the device, which makes an output from the third neurol circuit to learn so as turn to the reliability of learning data. CONSTITUTION:With using the first neural circuit learned, an process operating value of its input is varied around the actual operating data of many group, the quality value as an output of this circuit is generated and then these are made to the leaning data of the second neural circuit. Among generated learning data, quality data, its physical property and uncontrollable operating data are inputtted to the second multilayer type neural circuit, this circuit's output turns to control variable by learning a weighing coefficient of the multilayer nerve circuit. By inputting the quality target value of flaw, etc., and process operating value of non control variable, the circuit's output and controlled variable of the quality control system is obtained. By inputting the controlled variable in the third neural system, the reliability of controlled variable is obtained through the output value of circuit.

7. 发明专利

JPH06304619A PHYSICAL DISTRIBUTION SCHEDULING DEVICE FOR HOT ROLLING PLANT 失效
公开(公告)号：JPH06304619A
公开(公告)日：1994-11-01
申请号：JP10100593
申请日：1993-04-27
申请人： NIPPON STEEL CORP
发明人： MISHIMA YOSHIHISA , OKAI HARUTOSHI , UEYAMA KOJI
IPC分类号： B21B37/00 , C21D11/00 , G05B13/04
摘要： PURPOSE:To ameliorate the physical distribution of a rolling slab in a process in a physical distribution system in a hot rolling plant. CONSTITUTION:This device is composed of a slab data inputting part 101, a width sorting part 102, a rolling constraint matrix calculating part 104, a rolling evaluation value matrix calculating part 105, a rolling order solution search part 106, a heating furnace constraint calculating part 108, a loading furnace solution search part 109 and a physical distribution simulator part 110. An attribute of a material slab being an object of rolling is inputted, the material slab is sorted by the attribute, a constraint condition is calculated by the attribute through the matrix, an evaluation function is calculated by the matrix, the rolling order is decided by a neighboring search, a constraint condition is calculated to sort the slabs in which rolling order is decided into each heating furnace, the evaluation function is calculated by loading each slab into an adequate heating furnace, the optimum solution is searched by changing a loading furnace of each slab to decide the loading furnace. Consequently, the loading time, the extracting time, the loading furnace, the loading order can be decided by quantitative evaluation and the optimum physical distribution can be carried out. As a result, improvement of productivity, reduction of cost, stabilization of quality can be realized.

8. 发明专利

JPH06279851A METHOD FOR CONTROLLING QUALITY OF HOT-ROLLED MATERIAL 失效
公开(公告)号：JPH06279851A
公开(公告)日：1994-10-04
申请号：JP6441693
申请日：1993-03-23
申请人： NIPPON STEEL CORP
发明人： KATORI HIDEO , SENUMA TAKEHIDE , YOSHITANI NAOHARU , UEYAMA KOJI , ITO MASAHIRO
IPC分类号： B21B45/02 , C21D8/02
摘要： PURPOSE:To embody sufficient gamma to alpha transformation of a hot-rolled steel sheet between stands in hot tandem rolling. CONSTITUTION:Based on the difference DELTAT(i) of the tension measured value and the aimed tension between the stand (i-1) and the stand (i), the changing quantity to the position of rolling reduction at the stand (i) is calculated. Based on the sheet thickness difference Hi-Hsi at the outlet side of the stand (i-1) and the rolling material velocity V(i-1) at the outlet side of the stand (i-1), the changing quantity to the position of rolling reduction at the stand (i) is calculated and the sum DELTAS(i) of both changing quantities to the positions of rolling reduction is calculated. Based on the correcting quantity DELTAS(i) to the position of rolling reduction, the position of rolling reduction is corrected by a driving means of the stand (i), and roll peripheral velocity is corrected according to the mass-flow constant rule. In the loop-less hot-rolling, the rolling material between the stands is cooled by a cooling device arranged near these stands and having >=1500 [kcal/m . deg.CC.hr] cooling capacity and transformed from the gamma grain to the alpha grain to >=80% in the metallurgical structure between these stands.

9. 发明专利

JPH06198416A METHOD FOR IMPRESSING AC FOR CONTROLLING FLUIDITY OF MOLTEN METAL BY INDUCTION ELECTROMAGNETIC FORCE 失效
公开(公告)号：JPH06198416A
公开(公告)日：1994-07-19
申请号：JP185293
申请日：1993-01-08
申请人： NIPPON STEEL CORP
发明人： UMETSU KENJI , FUJISAKI KEISUKE , UEYAMA KOJI , WAJIMA KIYOSHI
IPC分类号： B22D1/00 , B22D11/10 , B22D11/115 , B22D27/02
摘要： PURPOSE:To efficiently control the fluidity of a molten metal by impressing AC modulating a carrier wave (high frequency) with a signal wave (low frequency) to an induction coil. CONSTITUTION:To the induction coil 4 having 5mm thickness of the iron sheet 3, the AC having the max. current density ¦Jo¦=1.0X10 [A/m ], and the time interval DELTAt=0.00125sec, is impressed. Variation with time of the current density in the impressed AC is made to be Jo=Jcos(2pif1t+alphasin2pif2t) and the variation of the current value is made to be ] -1.0X10 .sin [50pit+4cos(10pit)]. In order to move the molten metal, the frequency (f2) of the signal wave and the frequency (f1) of the carrier wave can independently be selected, and by setting these frequencies corresponding to the mass of the molten metal, the fluidity can be generated and the intensity of the electromagnetic force can freely be set by the max. frequency in the impressed AC. Thus, inclusions and bubbles in the molten metal are floated up and the mixture thereof into a cast slab can be prevented.

10. 发明专利

JPH06183562A LEVITATION CONTROL METHOD AND MAGNETIC LEVITATION DEVICE FOR MAGNETIC SUBSTANCE BY MAGNETIC FORCE 失效
公开(公告)号：JPH06183562A
公开(公告)日：1994-07-05
申请号：JP33933592
申请日：1992-12-18
申请人： NIPPON STEEL CORP
发明人： FUJISAKI KEISUKE , WAJIMA KIYOSHI , UMETSU KENJI , UEYAMA KOJI , OTOBE HIROSHI , SAEKI HIDEMASA
IPC分类号： B60L13/06 , B65G54/02 , B65H5/00 , B65H29/30
摘要： PURPOSE:To suppress a magnetic substance from shaking by feedback- controlling voltage, applied to an electric coil so that a detection gap conforms with an objective gap, based on feedback gains corresponding to the objective gap, so as to smooth and further to stabilize levitating or lowering down the magnetic substance. CONSTITUTION:When a magnetic substance 2 is levitated, a gap value group is set, to change a target gap Go successively from a large gap value to a small gap value of the gap value group. Further, the gap value is changed corresponding to a gap value of changing feedback gains K1 to K4. In addition, a current value (i) flowing in an electric coil 3a of an electromagnet 1a and a gap (x) between this electromagnet 1a and the magnetic substance 2 of receiving magnetic force of the electromagnet are detected, and corresponding to these current value and gap and to the objective gap Go, voltage applied to the electric coil 3a, so that the detection gap (x) agrees with the objective gap Go, is feedback-controlled, based on the feedback gains K1 to K4.

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