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1. 发明专利

JPH0499900A AUTOMATICALLY CONTROLLING METHOD FOR VELOCITY IN CONTINUOUS PROCESS LINE OF STRIP 失效
公开(公告)号：JPH0499900A
公开(公告)日：1992-03-31
申请号：JP21432990
申请日：1990-08-15
申请人： NIPPON KOKAN KK
发明人： MAEKAWA YASUNOBU , KANETAKA MITSUMASA , SAKAMOTO NORIHIKO
IPC分类号： C25D7/06 , C25D21/12
摘要： PURPOSE:To control the velocity of a line to the optimum velocity by fetching length of a coil and length of a looper or the like into a process controller while a line is operated and calculating the central velocity of the line which is constrained in the various conditions and presetting the minimum velocity thereof at every event as the central velocity of the line and automatically controlling the central velocity of the line. CONSTITUTION:The inlet and outlet-side loopers 2, 4, a treating equipment 3 and the bridle rolls 6, 7 are provided in the continuous process line of a strip and automatic velocity control is performed. Therein while the line is operated, length of a coil, length of the inlet and outlet-side loopers and velocity of the line are fetched into a process controller. The central velocity of the line is calculated which is constrained in the various conditions. The minimum velocity is preset at every various event as the central velocity of the line. The central velocity of the line is automatically controlled. Thereby the velocity of the line is successively controlled to the optimum velocity in accordance with the length of the coil in the inlet and outlet sides of the line and the capacity of the loopers.

2. 发明专利

JPH03294496A PRODUCTION OF GALVANIZED STEEL SHEET HAVING FINE APPEARANCE 失效
公开(公告)号：JPH03294496A
公开(公告)日：1991-12-25
申请号：JP9496590
申请日：1990-04-12
申请人： NIPPON KOKAN KK
发明人： WATANABE TSUTOMU , SAGIYAMA MASARU , KAWABE MASAKI , KANETAKA MITSUMASA , TAKAGI AKIRA , NADA NOBUYUKI
IPC分类号： C25D3/22 , C25D5/26
摘要： PURPOSE:To form a zinc layer having superior lightness and luster on a steel sheet by galvanization by setting an insoluble anode in a galvanizing bath contg. specified amts. of zinc sulfate, aluminum sulfate and lead ions and carrying out electrolysis with the bath under specified conditions of temp., pH and flow rate. CONSTITUTION:An insoluble anode is set in a galvanizing bath contg. 100-600g/l ZnSO4.7H2O, 10-200g/l Al2(SO4)3.14-18H2O and as impurity ions and a steel sheet is galvanized with the bath under the conditions of 40-70 deg.C, pH0-2.5 and >=1m/sec flow rate. A zinc layer having fine appearance, satisfactory lightness and luster is formed on the steel sheet.

3. 发明专利

JPH06246345A TAKING UP METHOD FOR STEEL STRIP 失效
公开(公告)号：JPH06246345A
公开(公告)日：1994-09-06
申请号：JP3581393
申请日：1993-02-24
申请人： NIPPON KOKAN KK
发明人： KARIYASU TAKAHIRO , KANETAKA MITSUMASA , ORITO YASUO , HASHIGUCHI MASABUMI
IPC分类号： B21C47/00 , B21C47/06
摘要： PURPOSE:To reduce transfer of an end mark by controlling a tension applied on a steel strip in accordance with the thickness of the steel at the beginning of taking up and adjusting the depth of sinking of the tip end of steel strip into a take-up sleeve within a specific range. CONSTITUTION:The plated steel strip 5 is passed on a bridle roll 12 and the tip end of it is cut off by a shearing machine 13 to shape the tip end. The strip 5 is carried toward a tension reel 17 from the machine 13 and wound on the reel 17 operating a belt wrapper 15 when the tip end of strip 5 has reached immediately before the reel 17. The tension applied on the strip 5 is increased just before the strip is wound about one round on the reel. The sinking depth of the tip end of strip 5 is adjusted to be maintained within 0.5-1.0 steel thickness as for the variation of a tension. The tension must be controlled in a short period only at the beginning of taking-up.

4. 发明专利

JPH04168284A CURRENT CONTROL METHOD FOR ELECTROLYTIC CHROMATE TREATMENT 失效
公开(公告)号：JPH04168284A
公开(公告)日：1992-06-16
申请号：JP29449590
申请日：1990-10-31
申请人： NIPPON KOKAN KK
发明人： TAKAGI AKIRA , KANETAKA MITSUMASA , WATANABE TOYOFUMI , HATANO HIROSHI , SAKAMOTO NORIHIKO
IPC分类号： C23C22/24 , C25D11/38
摘要： PURPOSE:To control the current of an electrolytic chromate treatment and to obtain a specified Cr deposition by selecting the constants corresponding to the number of treatment pass times determined from the target Cr deposition and determining a correct current density by using a specific relation, then determining a current value. CONSTITUTION:The number of the treatment pass times corresponding to the Cr deposition and the constants (a), (b) by each Cr deposition of the relation: Dk=a.LS+b (Dk: current density A/dm , LS: line speed m/min, a, b: constant) are determined in accordance with the experiment of the electrolytic chromate treatment and are stored in a computer. The number of the treatment pass times corresponding to the given target Cr deposition is then determined from this Cr deposition. Further, the values (a), (b) corresponding to the target Cr deposition are selected from the table of the values (a), (b) by each Cr deposition at this number of the treatment pass times and the correct current density is calculated by the above-mentioned equation. The current value is determined from this current density and the current control is executed.

5. 发明专利

JPH01252799A METHOD FOR CIRCULATING PLATING LIQUID IN ELECTROPLATING 失效
公开(公告)号：JPH01252799A
公开(公告)日：1989-10-09
申请号：JP8049288
申请日：1988-03-31
申请人： NIPPON KOKAN KK
发明人： ANAMI TATSURO , TSUJIHARA TOSHIYUKI , KANETAKA MITSUMASA , MATSUDA HIDEMICHI , ARAKI YOSHIHARU , MIYOKAWA KEIICHI
IPC分类号： C25D17/00 , C25D21/14
摘要： PURPOSE:To perform gas-liquid separation of the air involved in plating liquid and to save the reducing treatment expense by providing a receiver for temporally storing the plating liquid in the return flow path and continuously controlling the liquid level of the plating liquid stored in the receiver. CONSTITUTION:A strip 2 is passed through the dam rolls 3 of the plating tanks 1 and plated and the plating liquid discharged through the gaps of the dam rolls 3 is collected into the receiver 5 and sent to a circulation tank 4 through a return flow path 9 consisting of the pipelines 6, a pipe common return 7 and a pipeline 8 and regulated in composition and thereafter returned to the plating tanks 1. At this time, the flow rate controlling valves 20 are provided to the pipelines 6 respectively and the flow rate of plating liquid discharged from the receiver 5 is controlled and the plating liquid is stayed in the reservoirs 5. Further the flow rate control of plating liquid is performed by detecting the liquid level of the receiver 5 with the liquid level detectors 21 and sending the signals to the flow rate controllers 22 to compare the liquid level of the receiver 5 with the target value herein and actuating the flow rate controlling valves 20 so that the liquid is regulated to the target value. Thereby the air involved in the plating liquid is separated in the receiver 5 and stripped to the atmosphere.

6. 发明专利

JPS6130008B2 失效
公开(公告)号：JPS6130008B2
公开(公告)日：1986-07-10
申请号：JP13571778
申请日：1978-11-06
申请人： NIPPON KOKAN KK
发明人： IRIE TOSHIJI , IDE TETSUSHIGE , TANAKA MINORU , KANETAKA MITSUMASA , UEDA MASAHIRO , TAMURA YOICHI , NOGUCHI TAKAO
IPC分类号： C21D9/04

7. 发明专利

JPS5562122A HEAT TREATING METHOD FOR RAIL 失效
公开(公告)号：JPS5562122A
公开(公告)日：1980-05-10
申请号：JP13571778
申请日：1978-11-06
申请人： NIPPON KOKAN KK
发明人： IRIE TOSHIJI , IDE TETSUSHIGE , TANAKA MINORU , KANETAKA MITSUMASA , UEDA MASAHIRO , TAMURA YOUICHI , NOGUCHI TAKAO
IPC分类号： C21D9/04
摘要： PURPOSE:To form the abrasion resisting minute pearlite structure to a fixed depth, by specifying the gap between the opening end of heating furnace bottom and rail head side, collision flame temperature at the rail head surface and load quantity of combustion chamber, at the time of rapidly heating and cooling the rail head in the flame type heating furnace. CONSTITUTION:Central part of the heat-resisting material 1a forming the furnace bottom part of heating furnace having rectangular section, is opened notching along the furnace length direction (rail advancing direction shown by the arrow mark). Gap between the rail 2 head side placed on the conveyor 3, provided at the lower part of the furnace wall 1 and furnace bottom opening end, is made 5mm or more and collision flame temperature of the rail head sid and rail head surface heated by the burners for head top heating 4, 5, is held at more than 1700 deg.C and moreover, load heat quantity of combustion chamber is kept at more than 5X10 kcal/m .h.

8. 发明专利

JPS52114424A METHOD AND DEVICE FOR RECOMPOSITION OF ROLL GROUP IN CONTINUOUS CASTING EQUIPMENT 失效
公开(公告)号：JPS52114424A
公开(公告)日：1977-09-26
申请号：JP2980476
申请日：1976-03-22
申请人： NIPPON KOKAN KK
发明人： KANETAKA MITSUMASA
IPC分类号： B22D11/128 , B21B31/08 , B22D11/12

9. 发明专利

JP2529893B2 失效
公开(公告)号：JP2529893B2
公开(公告)日：1996-09-04
申请号：JP13202690
申请日：1990-05-22
申请人： NIPPON KOKAN KK
发明人： WATANABE TSUTOMU , SAGYAMA MASARU , KAWABE MASAKI , KANETAKA MITSUMASA , TAKAGI AKIRA , NADA NOBUYUKI
IPC分类号： C25D7/06

10. 发明专利

JPH0426794A HORIZONTAL ELECTROPLATING DEVICE 失效
公开(公告)号：JPH0426794A
公开(公告)日：1992-01-29
申请号：JP13202690
申请日：1990-05-22
申请人： NIPPON KOKAN KK
发明人： WATANABE TSUTOMU , SAGIYAMA MASARU , KAWABE MASAKI , KANETAKA MITSUMASA , TAKAGI AKIRA , NADA NOBUYUKI
IPC分类号： C25D7/06
摘要： PURPOSE:To obtain a plated steel sheet practically without a difference in glossiness between the front and rear by providing a couple of the upper rubber roll and lower metallic roll to interpose a traveling steel strip and crushing the protrusion of plating on the lower surface of the strip. CONSTITUTION:A couple of the upper rubber roll 11 and lower metallic roll 10 are provided on the outlet side of the final conductor roll 5a and backup roll 6a to interpose a traveling steel strip 3. The strip 3 is interposed between the rubber roll 11 and metallic roll 10, and the protrusion of plating on the lower surface of the strip 3 is crushed by the metallic roll 10 without regulating the pressure of the strip 3. The rubber roll 11 and metallic roll 10 can be set at an appropriate position on the downstream side of the conductor roll 5a and backup roll 6a, e.g. on the upstream side of a winder.

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