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1. 发明专利

JPH0452221A DEVICE FOR DECIDING WHETHER PRODUCTION OF IRON AND STEEL PRODUCTS IS POSSIBLE OR NOT 失效
公开(公告)号：JPH0452221A
公开(公告)日：1992-02-20
申请号：JP16178990
申请日：1990-06-20
申请人： NIPPON STEEL CORP
发明人： YAMANE HIROSHI , NAGAHASHI KAZUHIKO , AKEGA TAKAHITO , TANAKA HIROKI
IPC分类号： C21D8/00 , B21B37/00 , C21D11/00 , G06F9/44 , G06F15/18 , G06N3/00 , G06N5/04 , G06N99/00
摘要： PURPOSE:To automatically decide whether production is possible or not for the conditions on the particulars of the orders for which the coinciding actual results do not exist in the past by previously allowing the device to learn the weight coeffts. of network in accordance with the past records of the decision, inputting the specifications of the iron and steel products in the input layer of the network and taking out the result of the decision from the output layers. CONSTITUTION:This device is provided with a means which is provided with plural network means including means having plural input means and at least one output terminals and holding the plural weight coeffts. to determine the correlations between the signal levels inputted to the input terminals and the level of the output terminal and inputs the information on the sizes and material quality conditions relating to the specifications of the iron and steel products to be produced; a selecting means which identifies as to which of the predetermined plural groups the contents of the inputted specifications belong and select one among the plural network means; a means which executes a learning the weight coeffts, of the above-mentioned network weans according to the past deciding results.; and a means which delivers the outputs of the network means selected by the above-mentioned selecting means as the result of the decision.

2. 发明专利

JPH0225257A METHOD OF ESTIMATING GENERATION OF CENTRAL CRACK IN CONTINUOUS CASTING 失效
公开(公告)号：JPH0225257A
公开(公告)日：1990-01-26
申请号：JP17318288
申请日：1988-07-12
申请人： NIPPON STEEL CORP
发明人： MATSUSHITA AKIRA , NAGAHASHI KAZUHIKO , NINOMIYA TAKEYOSHI , GOTO ATSUHIRO
IPC分类号： B22D11/16
摘要： PURPOSE:To make adequate processing and to prevent the central crack by deciding the generation of the entrapment of an unsolidified molten steel and predicting the generation of the central trap when the entrapment quantity of the unsolidified molten steel exceeds the permissible limit quantity. CONSTITUTION:The generation of the entrapment of the unsolidified molten steel is decided when the time difference tf1 from the measurement time detected at a set period T by a measuring instrument before the complete solidification based on the measured time and the time difference tf2 of the next time measurement satisfies equation I at the time of estimating the complete solidification position of an ingot from the measured value by the shell thickness measuring instrument or ingot section temp. measuring instrument installed to a machine end part. The entrapment quantity of the unsolidified molten steel is calculated by equation II. In equation, Q: the entrapment quantity of the unsolidified molten steel; (n): the number of the times when the decision of the entrapment is continuously generated; tf1: the time difference before the complete solidification at the measurement time, tfi+n: the time difference before the measurement time when the tf1 at the generation of the entrapment decision of the unsolidified molten steel continuously (n) times is obtd. before the complete solidification after TXn; Vc: the casting speed, T: measurement period. The generation of the central crack is decided when the entrapment quantity exceeds the permissible limit quantity.

3. 发明专利

JPH0452001A METHOD FOR DISCRIMINATING POSSIBILITY OF MANUFACTURING SHAPE 失效
公开(公告)号：JPH0452001A
公开(公告)日：1992-02-20
申请号：JP16179090
申请日：1990-06-20
申请人： NIPPON STEEL CORP
发明人： NAGAHASHI KAZUHIKO , SUEMATSU KAZUO , AKEGA TAKAHITO
IPC分类号： B21B1/00 , B21B1/08 , B21B1/088 , B21B37/00 , G06F9/44 , G06N5/04
摘要： PURPOSE:To discriminate the propriety of manufacture by deciding a range that is specified by the combination of the web dimension and flange dimension of manufacturable shapes based on result information and comparing its web dimension and flange dimension to the specifications of the object for discrimination with the above-mentioned range. CONSTITUTION:A system is composed of an input/output device 101 and mainframe 106 of computer and a software comprising an expert system for discriminating the possibility of manufacture is located on the storage device of the mainframe of computer. The expert system is composed of a user interface 102, knowledge base 103, inference engine 104 and data base 105. The specification data of a product of which the possibility of manufacture is discriminated is inputted from the device 101 to the engine 104 through the interface 102. While a lot of experimental data that is stored on the data base 105 is referred, the processing based on the various rules that are registered on the base 103, i.e., inference is executed. In this way, the discrimination to the inputted data is executed and outputted to the device 101.

4. 发明专利

JPH0211258A METHOD FOR CONTINUOUSLY CASTING STEEL 失效
公开(公告)号：JPH0211258A
公开(公告)日：1990-01-16
申请号：JP15792988
申请日：1988-06-28
申请人： NIPPON STEEL CORP
发明人： MATSUSHITA AKIRA , NAGAHASHI KAZUHIKO , TENMA MASAMI , NINOMIYA TAKEYOSHI
IPC分类号： B22D11/16 , B22D11/20
摘要： PURPOSE:To enable control and correction of roll alignment, which is possible to prevent defect in a cast slab from happening, by calculating internal strain in the cast slab at arranging position of the all guide rolls at least to a roll for the finish straightening. CONSTITUTION:A measuring instrument 20 and a gap measuring meter 41 are set to a dummy bar 9. Beforehand, steel kind, casting width, secondary cooling condition, etc., are inputted to a process computer 12 as casting conditions. By using casting conditions inputted from a measuring instrument 10, passing quality (l), reference passing quality, displacing quantity deltaM, etc., are operated through an arithmetic unit 13, and beforehand a permissible internal total strain epsilonCT needed to each steel kind, is set. By the equation (I), a roll irregularity strain epsilonA, cast slab internal total strain epsilonT and permissible internal strain epsilonC are obtd. From quantitative relation between the roll irregularity strain epsilonA and the internal strain epsilonC obtd. with the arithmetic device 13, the suitability of the roll alignment is judged, and this result is shown in a monitor 14. Therefore, the control and the correction of the roll alignment, which is possible to prevent the defect in the cast slab from happening, can be executed.

5. 发明专利

JPH02274354A METHOD FOR CONTINUOUSLY CASTING STEEL 失效
公开(公告)号：JPH02274354A
公开(公告)日：1990-11-08
申请号：JP10541189
申请日：1989-04-25
申请人： NIPPON STEEL CORP
发明人： MATSUSHITA AKIRA , NINOMIYA TAKEYOSHI , NAGAHASHI KAZUHIKO
IPC分类号： B22D11/16 , B22D11/20
摘要： PURPOSE:To prevent inner cracking in a cast slab from occurring in advance by comparing the total strain calculated with the specific equation from a contributing effect factor for strain difference set according to operational conditions with the limited strain and changing the casting conditions. CONSTITUTION:The widths at upper and lower faces are calculated with a computing element 11 from the signal of a cast slab width measuring instrument 10 at inlet side and outlet side in straightening zone, and an neutral shifting quantity eta and the strain difference epsilon are calculated in every moment from the equation I with a strain computing element 12. Further, information on condition from a casting condition instruction device and measured result from roll gap and arrangement measuring instrument 9 are transmitted to a strain computing element 12, and bulging strain epsilonB and straightened strain epsilonU are obtd. to operate a roll irregular strain epsilonM. Then, each strain is calculated in every moment with the strain computing element 12, and the total strain epsilonT in the cast slab is calculated with the strain computing element 12 referring to the pre-obtd. contributing effect factor alpha and limited strain epsilonC from the casting condition, and compared with the limited strain epsilonC. Then, when the total strain epsilonT becomes more than the limited strain epsilonC, this is outputted to a working instruction device 15 and the development of the inner cracking is prevented.

6. 发明专利

JPS6448651A METHOD FOR ASSUMING CRATER END 失效
公开(公告)号：JPS6448651A
公开(公告)日：1989-02-23
申请号：JP20253187
申请日：1987-08-13
申请人： NIPPON STEEL CORP
发明人： GOTO ATSUHIRO , YONEDA MITSUO , TANIGUCHI YUICHI , NAGAHASHI KAZUHIKO
IPC分类号： B22D11/16
摘要： PURPOSE:To assume crater end by finding passing time from completion of solidification to setting position of electromagnetic ultrasonic generating and receiving unit from average temp. for thickness direction of a cast slab found by using the electromagnetic ultrasonic wave and surface temp., etc., found by actual measurement or calculation. CONSTITUTION:The average temp. Ta for the thickness direction of the cast slab is found by the electromagnetic ultrasonic generating and receiving unit 2 arranged at end part of a casting method behind position, where at least the cast slab is solidified to the center part. Further, by finding the passing time from the completion of the solidification to the setting position of the electromagnetic ultrasonic unit with the equation from the surface temp. Ts, etc., at the above position, position of the crater end 8 is assumed. With the assumed value obtd. by this method, quality of the cast slab can be uniformized.

7. 发明专利

JPH0512066B2 失效
公开(公告)号：JPH0512066B2
公开(公告)日：1993-02-17
申请号：JP17318288
申请日：1988-07-12
申请人： NIPPON STEEL CORP
发明人： MATSUSHITA AKIRA , NAGAHASHI KAZUHIKO , NINOMYA TAKEYOSHI , GOTO ATSUHIRO
IPC分类号： B22D11/16

8. 发明专利

JPH0464789B2 失效
公开(公告)号：JPH0464789B2
公开(公告)日：1992-10-16
申请号：JP15792988
申请日：1988-06-28
申请人： NIPPON STEEL CORP
发明人： MATSUSHITA AKIRA , NAGAHASHI KAZUHIKO , TENMA MASAMI , NINOMYA TAKEYOSHI
IPC分类号： B22D11/16 , B22D11/20

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