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1. 发明专利

JPH0555206B2 失效
公开(公告)号：JPH0555206B2
公开(公告)日：1993-08-16
申请号：JP28429385
申请日：1985-12-19
申请人： NIPPON KOKAN KK
发明人： TODO KUNIO , YAMASHITA JUHEI
IPC分类号： B21D5/12 , B21B17/14 , B21C37/08 , B21C37/15 , B21D5/08

2. 发明专利

JPS62144819A MANUFACTURE OF SQUARE STEEL TUBE 失效
公开(公告)号：JPS62144819A
公开(公告)日：1987-06-29
申请号：JP28429385
申请日：1985-12-19
申请人： NIPPON KOKAN KK
发明人： TODO KUNIO , YAMASHITA YUHEI
IPC分类号： B21D5/12 , B21B17/14 , B21C37/08 , B21C37/15 , B21D5/08
摘要： PURPOSE:To manufacture of square steel tubes of a large sectional size by abutting the top end of a succeeding steel tube on the rear end of a preceding steel tube to provide a propelling force for the preceding tube by a pushing force of the succeeding tube. CONSTITUTION:A square steel tube rolling stand group 2 is composed of two front stage rolling stands No.1 and No.2 which restraint a tube whose sectional shape is still round and four rear stage stands No.3-No.6. A steel tube 1 introduced into a square steel tube rolling process is provided with a propelling force by being carried by the front stage stands No.1 and No.2 with the sectional shape of the tube 1 round and is rolled and formed into a square shape sequentially by the rear stage stands. In that time, the rear end 10 of the preceding tube 1 is abutted on the top end 10' of the succeeding tube 1' and is fully driven and propelled by the propelling force of the succeeding tube 1'. In this method, a driving and propelling force is given in the case of manufacture of large sectional size square steel tubes, so that those tubes can be manufactured.

3. 发明专利

JPH09300015A DEVICE FOR BENDING TIP PART OF COIL 失效
公开(公告)号：JPH09300015A
公开(公告)日：1997-11-25
申请号：JP11895196
申请日：1996-05-14
申请人： NIPPON KOKAN KK
发明人： MORIHIRA AKIHIRO , TODO KUNIO , KUSAKA SHUICHI , SHIBUTA TSUTOMU , SEKINE YUKIO
IPC分类号： B21C37/083
摘要： PROBLEM TO BE SOLVED: To upward bend the tip part of a coil to prevent contact when the tip part of an uncoiled coil is passed through a coil transporting equipment. SOLUTION: At the point of time when the tip part 3 of a coil 6 which is passed through a leveler 5 is projected by a prescribed distance on the downstream side from a support roll 4, the movement of the coil is stopped. Next, by lifting the elevating/lowering roll 1 from below the coil 6, abutting on the undersurface of the tip part 3 of the coil 6, lifting the tip part 3 as it is, abutting the surface of the coil 6 on the support roll 4 and, further lifting it, the tip part 3 of the coil 6 is upward bent. When the tip part 3 of the coil upward bent, the tip part 3 of the coil 6 becomes approximately horizontal coupled with the weight of the coil itself and the transporting equipment is not damaged when the tip part 3 of the coil is passed through the equipment.

4. 发明专利

JPH08285173A METALLIC PIPE AND END SURFACE ALIGNING DEVICE OF TRIPLE PIPE COMPOSED OF SYNTHETIC RESIN PIPES ON ITS INSIDE SURFACE AND OUTSIDE SURFACE 失效
公开(公告)号：JPH08285173A
公开(公告)日：1996-11-01
申请号：JP11111895
申请日：1995-04-12
申请人： NIPPON KOKAN KK , KOKAN KIKAI KOGYO KK , KIYOUA GIJUTSU KK
发明人： TODO KUNIO , SUGIMOTO YUJI , NAGASAKA HIDEYA , INOUE ISAO , HIRAI HIDEO , SHIROCHI TOKUO
IPC分类号： F16L58/10
摘要： PURPOSE: To automatically align end surfaces in a desired position with high efficiency by bringing a first contact part into contact with end surfaces of synthetic resin pipes on outside and inside surfaces in respective first and second force pistons, and bringing a second contact part into contact with an end surface of a metallic pipe protrusively arranged toward the inside in the pipe shaft direction more than its first contact part. CONSTITUTION: A first force piston 1 and a second force piston 2 movable in the pipe shaft direction of a triple pipe T are arranged on both outsides in the pipe shaft direction of the triple pipe T placed on a placing stand 5. In its respective first force piston 1 and second force piston 2, a first contact member 1a is brought into contact with end surfaces of a synthetic resin pipe A on an outside surface and a synthetic resin pipe C on an inside surface, and a steel pipe B is brought into contact with a second contact part 1b. A first contact part 2a is brought into contact with the other end surface, and a second contact part 2b is brought into contact with a steel pipe B protrusively arranged toward the inside in the pipe shaft direction more than its first contact part 2a. Therefore, end surfaces of the triple pipe T can be automatically aligned in a desired position with high efficiency.

5. 发明专利

JPH08178175A MANUFACTURE OF SYNTHETIC RESIN COVERED METALLIC PIPE AND DEVICE THEREFOR 失效
公开(公告)号：JPH08178175A
公开(公告)日：1996-07-12
申请号：JP33808894
申请日：1994-12-26
申请人： NIPPON KOKAN KK , KOKAN KIKAI KOGYO KK , KIYOUA GIJUTSU KK
发明人： NAGASAKA HIDEYA , SUGIMOTO YUJI , TODO KUNIO , NAKAJIMA SADATOSHI , INOUE ISAO , HIRAI HIDEO , SHIROCHI TOKUO
IPC分类号： F16L58/10 , B29C63/18 , B29C63/34 , B29C63/42
摘要： PURPOSE: To uniformize heating in the direction of length and the peripheral direction of a pipe body by continuously heating a metallic pipe in the axial direction of a pipe by means of two horizontally moving induction heating coils. CONSTITUTION: A metallic pipe group on a conveyor 3 in which a synthetic resin tube 2 is inserted is moved to the installation position of electromagnetic induction heating coils 17a and 17b. Central part ports 18b and 18c are raised and the central part of the pipe body of a metallic pipe group is lifted to a level above that of the conveyor 3. With this state, the electromagnetic induction heating coils 17a and 17b are inserted in a metallic pipe group and moved to the vicinity of the central supports 18b and 18c. After two end part supports 18a and 18d are raised, the central part supports 18b and 18c are lowered and the heating coils 17a and 17b are moved to the central part of the pipe body. The heating coils 17a and 17b are energized by an electromagnetic induction heating generator 1 and each of the heating coils 17a and 17b is moved to the two pipe end parts of a metallic pipe group.

6. 发明专利

JPH09182906A ROLL STAND OF ROUND TUBE STRETCH REDUCER AND ROLLING METHOD OF ROUND TUBE 失效
公开(公告)号：JPH09182906A
公开(公告)日：1997-07-15
申请号：JP34330295
申请日：1995-12-28
申请人： NIPPON KOKAN KK
发明人： YABUMOTO SATORU , SUZUKI MASAYUKI , TODO KUNIO , KUROSAWA TOSHIYUKI , SUGIMOTO YUJI
IPC分类号： B21B17/14 , B21B31/02
摘要： PROBLEM TO BE SOLVED: To reduce inner face angularness of a product by rotating a roll stand in the plane orthogonal crossing to a rolling pass line at a specified angle. SOLUTION: A housing 1 is fixed on a rotatable cradle 2. A moving cradle 2 is fixed on a fixed cradle 4, by rotating a lead screw 5 arranged on the fixed cradle 4, the moving cradle 2 is rotatable in a range of -15 deg. to 15 deg. around a pass line. That is, by a simple operation of rotating the lead screw 5, each roll is arranged while having a specified angular displacement in the peripheral direction of a rolling pass line. Accordingly, while a base tube to be stretch- reduced by each stand is advancing, it is subjected to plastic deformation from directions different by, e.g. 15 deg., a tube thickness and a roundness of inner face are improved.

7. 发明专利

JPH08285174A DEVICE FOR INSERTING RESIN INSERTING PIPE INTO SYNTHETIC RESIN PIPE 失效
公开(公告)号：JPH08285174A
公开(公告)日：1996-11-01
申请号：JP11111995
申请日：1995-04-12
申请人： NIPPON KOKAN KK , KOKAN KIKAI KOGYO KK , KIYOUA GIJUTSU KK
发明人： TODO KUNIO , SUGIMOTO YUJI , NAGASAKA HIDEYA , INOUE ISAO , HIRAI HIDEO , SHIROCHI TOKUO
IPC分类号： B23P21/00 , F16L9/12 , F16L58/10
摘要： PURPOSE: To automatically insert a metallic pipe such as a resin inserting pipe into an inside surface of a synthetic resin pipe with high efficiency by forming tapers in inlets of guide parts so that synthetic resin inserting pipes can easily enter clamp parts of a mutually vertically divisible lower clamp and an ascendable-descendable upper clamp. CONSTITUTION: A carrier V roller 4 to transfer resin inserting pies B and C to be inserted into a synthetic resin pipe A in the pipe shaft direction of the synthetic resin pipe A, is arranged on a pipe shaft extension line of the synthetic resin pipe A placed on a placing stand 9. A mutually vertically divisible lower clamp 1 and an ascendable-descendable upper clamp 2 are arranged on one end of the placing stand 9 on its carrier V roller 4 side. Guide parts 2b and 1b are arranged in clamp parts 2a and 1a of its lower clamp 1 and upper clamp 2, and taper parts 2c and 1c are formed in inlets of its guide parts 2b and 1b so that the resin inserting pipes B and C can easily enter the clamp parts 2a and 1a. Therefore, a metallic pipe can be reliably inserted without flawing and damaging a pipe body.

8. 发明专利

JPH08183109A PRODUCTION OF SYNTHETIC RESIN COATED METAL PIPE 失效
公开(公告)号：JPH08183109A
公开(公告)日：1996-07-16
申请号：JP32653694
申请日：1994-12-28
申请人： NIPPON KOKAN KK
发明人： NAGASAKA HIDEYA , SUGIMOTO YUJI , OMORI KATSUMI , TODO KUNIO , NAKAJIMA SADATOSHI
IPC分类号： F16L9/14 , B29C63/34 , B29C63/38 , B29D23/00 , B29L9/00 , B29L23/00
摘要： PURPOSE: To produce a synthetic resin coated metal pipe capable of uniformly heating a metal pipe in which a synthetic resin tube is inserted over the whole of the pipe and becoming uniform in the adhesive strength of the metal pipe and the synthetic resin tube over the whole of the pipe. CONSTITUTION: A metal pipe 1 having a synthetic resin tube 2 inserted therein or fitted to the outer surface thereof is moved in the direction crossing the pipe axis thereof at a right angle by a conveyor 3 and an electromagnetic induction heating coil 11 is arranged obliquely with respect to the moving direction of the metal pipe 1 to surround the conveyor 3 and the metal pipe 1 and auxiliary heating devices 4 are arranged so as to cover the end parts of the metal pipe 1. The metal pipe 1 is continuously heated from one end thereof to the other end thereof to closely bond the synthetic resin tube 2 to the metal pipe to produce a synthetic resin coated metal pipe wherein at least one of the inner and outer surfaces of the metal pipe is coated with a synthetic resin.

9. 发明专利

JPH0631313A EXCHANGING DEVICE FOR HOUSING OF STRETCH REDUCER 失效
公开(公告)号：JPH0631313A
公开(公告)日：1994-02-08
申请号：JP20848892
申请日：1992-07-13
申请人： ISHIKAWAJIMA HARIMA HEAVY IND , NIPPON KOKAN KK
发明人： IMAI TATSUO , TODO KUNIO , KUROSAWA TOSHIYUKI , SHIBUTA TSUTOMU
IPC分类号： B21B17/14 , B21B31/08
摘要： PURPOSE:To exchange a housing in a short time by providing a housing exchanging truck with which many housings which are clamped with a housing supporting table and housing clamp are lifted and moved between the position on the line and housing exchanging stations. CONSTITUTION:The housing supporting table 21 on which many housings 4 for stretch reducer which is provided with rolls 9 for reducing a tube 8 can be supported in the line direction (20) is provided. A housing clamp 36 with which the upper parts of the many housings 4 which are supported on the housing supporting table 21 are restrained at once and the housing exchanging truck 35 with which the many housings 4 which are clamped with the housing supporting table 21 and housing clamp 36 are lifted and moved between the position on the line and the housing exchanging stations 32, 33 are provided.

10. 发明专利

JPH08300012A THREE-ROLL STRETCH REDUCTION METHOD FO METALLIC TUBE 失效
公开(公告)号：JPH08300012A
公开(公告)日：1996-11-19
申请号：JP10404595
申请日：1995-04-27
申请人： NIPPON KOKAN KK
发明人： YABUMOTO SATORU , OMORI KATSUMI , KUROSAWA TOSHIYUKI , IKEDA YUKIHIRO , SUGIMOTO YUJI , TODO KUNIO
IPC分类号： B21B17/14
摘要： PURPOSE: To decrease angles in the peripheral direction of the inside surface of a product and to improve thickness deviation rate by arranging the rolls of roll stands imparting a specified angular displacement on a plane perpendicular to rolling pass line and executing rolling. CONSTITUTION: For example, after a steel strip 1 is heated to >=1200 deg.C in a heating furnace 2, both ends of the steel strip 1 are heated to 1380 deg.C with an edge heater 3. After that, by executing butt welding to both ends of the steel strip 1 with a tube making machine 4, the steel strip becomes a base tube 5. After stretch reducing this base tube 5 into a prescribed outside diameter and thickness with a stretch reducer 8 which is constituted of plural roll stands 7 making three rolls 6 which are arranged at the intervals of 120 deg. in the peripheral direction around the rolling pass line a set, the base tube is made into a product 10 by cutting it into a prescribed size with a cutting machine 9 and, after that, the product is transported to a cooling bed 11. Then, by executing rolling imparting the angular displacement that is a multiple of 9-15 deg. to the rolls 6 of the roll stand 7 on the plane perpendicular to the rolling pass line, the angles of the product 10 becomes >=24 angles and the out-of-roundness of the inside surface is improved.

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