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1. 发明专利

JPS5717354A METHOD FOR CONTROLLING FURNACE PRESSURE IN SHEET MANUFACTURING EQUIPMENT 失效
公开(公告)号：JPS5717354A
公开(公告)日：1982-01-29
申请号：JP8916780
申请日：1980-07-02
申请人： HITACHI LTD , HITACHI METALS LTD
发明人： KIMURA TOMOAKI , NISHINO TADASHI , TAGAWA MASAYOSHI
IPC分类号： B22D11/06
摘要： PURPOSE:To stably manufacture sheets having a uniform thickness, by controlling the furnace pressure so that amorphous metals reach a prescribed thickness on the basis of the variation of molten metal head in the furnace when sheets are manufactured with rotary drum. CONSTITUTION:A molten metal 2 is charged onto a rotary drum 9 from the nozzle 3 of furnace 1 and a sheet having thickness (h) is manufactured. The thickness (h) is detected by a thickness detector 16 and the circumferential speed of drum 9 is detected by a speed detector 16. Both detected values are multiplied by an operator 17. The difference between the initial value Qo of molten metal 2 in the furnace 1 and the integral value of outflow rate Q during manufacturing is obtained by an operator 18. The head of molten metal H is obtained by dividing the metallic amount R of molten metal contained in the furnace with the effective cross sectional area of furnace 1 by a divider 19 throug using the operation results obtained by operators 17 and 18. The difference DELTAH between the head H and the initial heat value Ho is obtained by a subtractor 20, and the furnace pressure P is controlled by a furnace pressure controlling device 8 via a screw 6, arm 5 and air cylinder 4 through driving a motor 7 so that a prescribed charging amount is obtained.

2. 发明专利

JPS5641052A TWIN ROLL TYPE ROLLING DEVICE 失效
公开(公告)号：JPS5641052A
公开(公告)日：1981-04-17
申请号：JP11528779
申请日：1979-09-10
申请人： HITACHI LTD , HITACHI METALS LTD
发明人： ISHIHARA NOBORU , IKUTA ISAO , OGAWA TAKUZOU , NISHINO TADASHI , MIYAZAKI TAKESHI
IPC分类号： B22D11/06
摘要： PURPOSE:To prevent the formation of any flaw on roll surfaces owing to scattering or meshing of oxide and improve the quality of an amorphous alloy tape by moving one roll after the molten metal in the initial period of tapping passes the gap of a pair of open roll thereby performing rolling. CONSTITUTION:Molten metal 1 spouting from a nozzle 2 in the first tapping is flowed down onto a high-speed revolving roll 3A surface. At this time, a detector 5 detects the tapping and gives a screwed down command to a servo-valve 8 via an amplifier 6 and a relay 7. Then, the servo-valve 8 operates when the molten metal 1 which has oxidized at the tip of the nozzle 2 or scattered flows down the gap of the rolls 3A, 3B, and this causes a jack 9 to move the roll 3B supported to a bearing 10 to the opposing face side of the roll 3A thereby performing rolling. The rolling load detected by the detector 12 is regulated with a reducing valve 13 and an accumulator 14 absorbs and eases the pulsation and impact of the roll 3B.

3. 发明专利

JPS5714445A THIN SHEET PRODUCING DEVICE 失效
公开(公告)号：JPS5714445A
公开(公告)日：1982-01-25
申请号：JP8663580
申请日：1980-06-27
申请人： HITACHI LTD , HITACHI METALS LTD
发明人： KIMURA TOMOAKI , NISHINO TADASHI
IPC分类号： B22D11/06
摘要： PURPOSE:To stably obtain a thin sheet of amorphous metal of uniform thickness by producing the thin sheet of amorphous metal while retreating a nozzle based on the thermal expansion of a rotary drum. CONSTITUTION:The gap up to the surface of a rotary drum 10 is measured with a gap sensor 26, and the measured signal is outputted to an operator 28, whilist the gap value up to the drum 10 before the start of production is outputted to the operator 28 by a commander 27. The difference thereof is operated by the operator 28, and this operated value corresponds to the rate delta of thermal expansion of the drum 10. This value delta is outputted to an adder 30, and a nozzle gap set value G0 is outputted from an indicator 29 as well. The value G0 and the rate delta are added in an adder 30, and a motor 25 is so controlled by way of a driving control circuit 31 that the gap coincides with the output of the adder 30. A screw 24 driven by the motor 25 revolves to vertically move a support plate 23, thereby adjusting the gap between the drum 10 and a tip nozzle 16.

4. 发明专利

JPS56158257A SHEET PRODUCING DEVICE 失效
公开(公告)号：JPS56158257A
公开(公告)日：1981-12-05
申请号：JP6059480
申请日：1980-05-09
申请人： HITACHI LTD , HITACHI METALS LTD
发明人： KIMURA TOMOAKI , NISHINO TADASHI , TAGAWA MASAYOSHI
IPC分类号： B22D11/06 , B22D11/16
摘要： PURPOSE:To improve the thickness accuracy of an amorphous metal sheet by detecting the thickness of the amorphous metal sheet on the surface of a rotary drum highly accurately and controlling the thickness of the sheet based on the detected value thereof. CONSTITUTION:The gap up to the surface of a sheet and up to the surface of a drum 10 are respectively measured by using the gap sensors 52, 54 disposed within the plane intersecting orthogonally with the revolving shaft 14 of the drum 10, whereby the thickness of a sheet 36 is detected with high accuracy. The control signal to a servo valve 62 is calculated in a pressure control panel 60 based on the detected values of the sheet thickness, the command value from a thickness command device 56 and the pressure detected value from the pressure detector 58 in the gas chamber 34 in a furnace 22. When the valve 62 is operated by this signal, the volume in the chamber 74 is changed by means of a hydraulic cylinder 68 and an air cylinder 72, according to which the pressure in the chamber 34 changes and by the change in the outflow rate of the molten metal from a nozzle 32, the thickness of the sheet is controlled.

5. 发明专利

JP2000317515A DEVICE AND METHOD FOR ADDING TENSION, AND FACILITY AND METHOD FOR TREATING STEEL STRIP 失效
公开(公告)号：JP2000317515A
公开(公告)日：2000-11-21
申请号：JP13373099
申请日：1999-05-14
申请人： HITACHI LTD
发明人： YAMAGUCHI TERUO , NISHINO TADASHI , HASHIMOTO SUNAO
IPC分类号： B21B39/08
摘要： PROBLEM TO BE SOLVED: To stably maintain the tension by providing a magnetic field generating device to generate the alternating magnetic field in the thickness direction of a steel strip on a tension maintaining device. SOLUTION: The tension is adjusted by adjusting the rotational speed of rotary type drums 40a, 40b and the intensity of the alternating magnetic field in the thickness direction of a steel strip 10. The intensity of the alternating magnetic field is adjusted by changing the gap 60 between the rotary type drums 40a, 40b. For example, an opening/closing device 65 which is a gap adjusting means is provided on the rotary type drums 40a, 40b to adjust the gap between two rotary type drums 40a, 40b. The intensity of the alternating magnetic field is adjusted by providing the opening/closing device on at least one of the rotary type drums 40a, 40b for adjustment. A pair of rotary drums 40a, 40b above and below the steel strip 10 opposite to each other, the alternating magnetic field is generated thereby to apply the force to suppress the traveling of the steel strip 10, and the tension is generated between a traveling device and a non-contact type tension maintaining device.

6. 发明专利

JPH1119756A CONTINUOUS CASTING APPARATUS 失效
公开(公告)号：JPH1119756A
公开(公告)日：1999-01-26
申请号：JP17804297
申请日：1997-07-03
申请人： HITACHI LTD
发明人： HIRANO SATOSHI , HORIUCHI HISAAKI , HORII KENJI , NISHINO TADASHI , SHIMOGAMA HIRONORI , ISONO MITSUHISA
IPC分类号： B22D11/08 , B22D11/04
摘要： PROBLEM TO BE SOLVED: To reduce the development of breakout and to relatively lower the cost by arranging the projections contacting with the curving surface of long sides in a mold to a part of a dummy bar head to obtain such a same action as the existence of large strength solidified shells at the outside of small strength solidified shell. SOLUTION: The SPCC-made projections 12 having e.g. 0.5 mm thickness, are fitted to the dummy bar head 10 so as to contact with the surfaces of the long sides in the mold. The size of the projection 12 in the width direction of a cost slab is made to almost the same size as the cast slab. In the estimation with calculation, e.g. the solidified shell thickness at 100 mm below a meniscus is about 2 mm at both stages of the initial stage of casting and in the stationary state, and it is considered that this thickness does not differ so large at both stage. However, in the initial stage of casting, the drawing resistance is large, because the lubrication with powder is insufficient, and it is considered that the strength of the solidified shell is smaller than or the same degree as the drawing resistance. In the case of using the dummy bar head with the projections, since such a same action is obtd. as thickening the solidified shells at the long sides in the mold at the initial stage of casting, the development of the breakout is reduced.

7. 发明专利

JPH09174117A METHOD FOR JOINING METALLIC PLATES AND DEVICE THEREFOR 失效
公开(公告)号：JPH09174117A
公开(公告)日：1997-07-08
申请号：JP28366196
申请日：1996-10-25
申请人： HITACHI LTD
发明人： ISHIKAWA NORITOSHI , FUNAMOTO TAKAO , NAGAKUBO HAJIME , MASUKO TAKASHI , NISHINO TADASHI , NIHEI MITSUO , HORII KENJI
IPC分类号： B21B15/00 , B21B1/26 , B21D39/03 , B23K20/00 , B23K37/04
摘要： PROBLEM TO BE SOLVED: To join metal plates having enough strength in a short time by lapping joining scheduled parts of metallic plates, supporting them from the lower side with supporting stands and relatively moving them so that the lapping part is clamped between a cutting blade and the supporting stand. SOLUTION: A lapping part of metallic plates is clamped from upper and lower sides and fixed. A cutting blade is lowered from an upper direction. A lap part (part to be clamped and pressed) showing in hatching exists on the extending area of the motion locus of the cutting blade and the clamp of the lower side. The lap part is pressed from the upper and lower direction. Because the metallic plate to be joined is restricted, the escaping place of the pressure exists only to the lateral direction. Following the shearing blade is lowered downward, the pressure to the lateral direction is raised. With this pressure, the metal of pressing part is deformed plastically. The shearing blade is lowered until matching upper and lower faces of an upper metallic plate and a lower metallic plate, and it is stopped. The front face of plastic flow part is made largely active. Because mutual parts of the upper and lower metal plates of plastic deformation flowing are pressed, the firm joining is realized.

8. 发明专利

JPH08309492A CONTINUOUS CASTING MACHINE FOR SHEET 失效
公开(公告)号：JPH08309492A
公开(公告)日：1996-11-26
申请号：JP14254196
申请日：1996-06-05
申请人： HITACHI LTD , KAWASAKI STEEL CO
发明人： NISHINO TADASHI , KAJIWARA TOSHIYUKI , KIMURA TOMOAKI , MORIWAKI SABURO
IPC分类号： B22D11/04 , B22D11/053 , B22D11/055 , B22D11/06
摘要： PURPOSE: To carry out the stable continuous casting of the sheet by easily drawing the sheet without solidifying the molten steel on the shorter side. CONSTITUTION: In a continuous casting machine of the sheet provided with a vibrating mold which consists of a longer mold and a shorter mold and is vibrated in the slab drawing direction, the vibrating mold is provided with a shorter mold 4 whose upper part is expanded and whose lower part is reduced, and which is made of the refractory of low heat conductivity. The sheet can be easily drawn without solidifying the molten steel 16 on the shorter side to enable the stable continuous casting of the sheet.

9. 发明专利

JPH08141715A CONTINUOUS CASTING APPARATUS AND CONTINUOUS CASTING METHOD 失效
公开(公告)号：JPH08141715A
公开(公告)日：1996-06-04
申请号：JP27816594
申请日：1994-11-11
申请人： HITACHI LTD
发明人： HORII KENJI , SHIMOGAMA HIRONORI , NISHINO TADASHI , AZEZAKI MASAYUKI , ISHIKAWA EIJI , HIRANO SATOSHI , ISONO MITSUHISA
IPC分类号： B22D11/16 , B22D11/04 , B22D11/05 , B22D11/059
摘要： PURPOSE: To provide a continuous casting apparatus and a method thereof which reduces a step developed between cast slabs caused by difference of dimensional precision and wearing form during casting and can prevent the development of a trouble in the cast slab, at the time of constituting a part of the wall of a mold which is brought into contact with molten metal with plural different materials. CONSTITUTION: Short side molds 2a, 2b at upstream side with a refractory and short side molds at downstream side with a metal of copper, etc., are constituted, and the continuous casting is executed by a contracted casting system widening the upper part of the short side mold in the thickness direction of the cast slab and gradually narrowing toward the lower part in the mold 1. Then, the short side mold 2a, 2b at upstream side and the short side molds at downstream side are suitably advanced/retreated in the direction of the molten metal, and in the case of developing the step caused by the difference of the dimensional precision between the refractory and the metals and the difference of the wearing form during casting work, this step is reduced so as to put in a prescribed permissible range.

10. 发明专利

JPH0899158A THIN SLAB CONTINUOUS CASTING MACHINE AND METHOD FOR CONTINUOUSLY CASTING THIN SLAB 失效
公开(公告)号：JPH0899158A
公开(公告)日：1996-04-16
申请号：JP23688294
申请日：1994-09-30
申请人： HITACHI LTD
发明人： YOSHIMURA YASUTSUGU , ONOSE MITSURU , HORII KENJI , SEKI KOICHI , NISHINO TADASHI , SHIMOGAMA HIRONORI , HANZAWA CHUKICHI
IPC分类号： B21B1/46 , B21B31/02 , B22D11/12 , B22D11/124 , B22D11/22
摘要： PURPOSE: To provide a thin slab continuous casting machine and a method for continuously casting the thin slab by which the slab temp. can be kept at the temp. possible to roll the slab even in the cast of changing casting speed according to the variation of the supplying rate of molten steel. CONSTITUTION: Guide rollers 4a-d having cooling spray are able to advance/ retract in the thickness direction of the slab 6 and cast slab heat insulating covers 15a-15d are inserted to/drawn out from the gap formed between these guide rollers. Then, someone at suitable positions out of the guide rollers 4a-4d and the cast slab heat insulating covers 15a-15d are switched over in use according to the casting speed. The cooling speed of the slab 6 is positively controlled by adjusting the length of a cooling zone and a heat insulating zone.

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