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1. 发明专利

JPH04237561A FUSION CUTTING DEVICE 失效
公开(公告)号：JPH04237561A
公开(公告)日：1992-08-26
申请号：JP538891
申请日：1991-01-21
申请人： NIPPON STEEL CORP , NITTETSU PLANT DESIGNING CORP
发明人： TAKADA KAZUHIKO
IPC分类号： B23K7/00 , B26F3/16
摘要： PURPOSE:To prevent the burn of plasma torches which are disposed orthogonally with each other with the plasma cutting device for small-section materials. CONSTITUTION:Torch holders 3 are provided on a revolving spindle surface plate 1 and the torches 7 are mounted to these torch holders 3 freely movably in the direction orthogonal with the moving direction of the torch holders. Further, the torches 7 are so formed that the nozzle directing direction thereof can be tilted with respect to the cutting surface of the material P to be cut.

2. 发明专利

JPH04167923A LOOPER DEVICE ON CONTINUOUSLY FINISHING EQUIPMENT 失效
公开(公告)号：JPH04167923A
公开(公告)日：1992-06-16
申请号：JP29299090
申请日：1990-10-30
申请人： NIPPON STEEL CORP , NITTETSU PLANT DESIGNING CORP
发明人： TAKADA KAZUHIKO , NAKAGAWA MICHIHIRO , UCHIYAMA EIZO
IPC分类号： B21B41/00 , B21C49/00
摘要： PURPOSE:To shorten the length and to obtain the continuously finishing equipment so as to reduce the equipment expenditure by making the looper device so that the treatment can be made by turning back the metallic strip to the upper and lower. CONSTITUTION:The strip material S from an uncoiler 16 is introduced to the bottom side of the pit 2 through the guide roller 13 set at the root of the fixed stand 12 via the jointing machine 15, guide roller 17, 18. And it passes from lower to upper between the upper and lower looper roller 6 of the main loop car 4 and the looper roller 8 of the sub-loop car 5 and fed the forming machine through the deflecter roller 19 and the guide roller 20 arranged at the outlet side of the pit 2. The operation for the thick plate material can be made with two lines, and for the thin sheet material can be made with four lines, by properly connecting and separating the main and sub two loop cars 4, 5 arranged in the common foundation pit.

3. 发明专利

JPH04162967A PLASMA CUTTING DEVICE FOR WELDED STEEL PIPE 失效
公开(公告)号：JPH04162967A
公开(公告)日：1992-06-08
申请号：JP28677490
申请日：1990-10-24
申请人： NIPPON STEEL CORP , NITTETSU PLANT DESIGNING CORP
发明人： TAKADA KAZUHIKO
IPC分类号： B21C37/30 , B23K10/00
摘要： PURPOSE:To set the cutting speed without being affected by a weld bead and to improve productivity by increasing a cutting electric current after detecting the weld bead and increasing the cutting current for the bead part having a thicker wall than a produced pipe than a part having a thin wall other than the bead part. CONSTITUTION:This plasma cutting device is provided with a plasma cutting torch 4 to cut the welded steel pipe 1 in the peripheral direction and a weld bead detection means to detect the weld bead 10 of the welded steel pipe at the time of cutting before attaining the cutting position by the torch. The plasma cutting current is increased only for the weld bead part of the welded steel pipe and the cutting current is suppressed for the other part having the thin wall and cutting can be performed. Consequently, the cutting speed of the welded steel pipe is set without being affected by the weld bead and the productivity can be improved. In addition, the cutting current can be suppressed for the greater part other than the weld bead and the service life of a nozzle of the plasma torch and an electrode can be extended.

4. 发明专利

JPH04162962A STRUCTURE OF TRUCK OF FLYING CUTTER FOR SPIRAL STEEL PIPE 失效
公开(公告)号：JPH04162962A
公开(公告)日：1992-06-08
申请号：JP28677390
申请日：1990-10-24
申请人： NIPPON STEEL CORP , NITTETSU PLANT DESIGNING CORP
发明人： TAKADA KAZUHIKO
IPC分类号： B23K7/00 , B23K37/02
摘要： PURPOSE:To prevent the deviation in the axial direction of a spiral steel pipe and to eliminate the dislocation of cutting by bringing an endless band-shaped body elastically along the outer peripheral surface of the spiral steel pipe in tight contact therewith, thereby putting both into a surface-to-surface contact without relative slips. CONSTITUTION:A caterpillar 18 as the endless band-shaped body consisting of roller chains 15, plate bodies 16 and rubber bodies 17 is brought into tight contact with the outer peripheral surface of the spiral steel pipe 2 and can be circumrotated within the plane orthogonal with the pipe axis as the spiral steel pipe rotates. In addition, the endless band-shaped body comes elastically into tight contact with the outer peripheral surface of the spiral steel pipe 2 in the surface-to-surface contact and can be put into not a rolling state by a point contact but a fixed clamp state. The track is, therefore, made to travel together with the spiral steel pipe in the pipe axial direction while the deviation in the pipe axial direction is prevented and while the component in the rotating direction of the spiral steel pipe is escaped. The generation of the dislocation in the cutting is obviated in this way and the dealing with even the spiral steel pipes of different diameters is possible while the relative surface-to-surface contact free from the relative slips is assured by the endless band-shaped body.

5. 发明专利

JPS62292334A STEEL PIPE CUTTING DEVICE 失效
公开(公告)号：JPS62292334A
公开(公告)日：1987-12-19
申请号：JP13579986
申请日：1986-06-11
申请人： NIPPON STEEL CORP , NITTETSU PLANT DESIGNING CORP
发明人： TAKADA KAZUHIKO , NISHIKAWA HIROSHI , NAKAGAWA MICHIHIRO
IPC分类号： B23D45/12 , B23K7/00 , B23P23/04 , B23Q1/76 , B23Q39/00
摘要： PURPOSE:To improve the productivity of a steel pipe by arranging a cutting groove machining mealing cutter and a plasma cutting device which are installed in an alignment to lifting devices respectively, on a track along the virtual cutting line of a steel pipe. CONSTITUTION:A cutting groove machining mealing cutter 2 and a plasma cutting torch 6 are arranged on a track along the virtual cutting line of a steel pipe and installed on a bogie 1. The cutting groove machining mealing cutter 2 is installed in an alignment to a cutter lifting device while the plasma cutting torch 6 is installed in an alignment to a lifting device 7. The lifting device 7 consists of a motor and a worm jack and is installed in an alignment to the beam part 6A of the plasma cutting torch 6 which is rotatably installed on a frame 14 provided on the lifting device 7 and the bogie 1, by means of a fluid cylinder 8 via a rotating member 15. Accordingly, the plasma cutting torch can be rotated by the rotating member 15 and the lifting device 7 for setting position, in accordance with the size of a steel pipe.

6. 发明专利

JPH04266485A PLASMA TORCH DEVICE 失效
公开(公告)号：JPH04266485A
公开(公告)日：1992-09-22
申请号：JP4767591
申请日：1991-02-19
申请人： PUROMETORON TEKUNIKUSU KK , NIPPON STEEL CORP , NITTETSU PLANT DESIGNING CORP
发明人： AOKI JUN , YAMAMOTO HARUMI , TAKADA KAZUHIKO , HAJIMA YOJI , NAKAGAWA MICHIHIRO
IPC分类号： B23K10/00 , H01R13/46 , H01R13/533 , H01R13/621
摘要： PURPOSE:To provide the plasma torch device having a connector for facilitating the connection and disconnection of a cable in a position near the plasma torch in order to facilitate and simplify the operation for exchanging jigs for cutting tubular bodies with the plasma torch device held to the jigs. CONSTITUTION:A connecting means 10 constituted by disconnectably connecting a 1st connecting half body 20 and a 2nd connecting half body 40 to each other is inserted to the packet cable in the position near the plasma torch.

7. 发明专利

JPH04187373A DEVICE FOR DETECTING COMPLETION OF CUTTING OF MEMBER 失效
公开(公告)号：JPH04187373A
公开(公告)日：1992-07-06
申请号：JP31485290
申请日：1990-11-20
申请人： NIPPON STEEL CORP , NITTETSU PLANT DESIGNING CORP
发明人： TAKADA KAZUHIKO , NAKAGAWA MICHIHIRO , MASHIMA HIROYOSHI
IPC分类号： B23K7/00
摘要： PURPOSE:To contrive on unmanned operation of a cutting device and a rear equipment by providing a cutting machine for cutting off a member of a prescribed length on an idle end side from a base material and a rotational speed detecting means for detecting the variation of the rotational speed of the member on the idle end side. CONSTITUTION:A steel tube 1 is mounted on driving rollers 3 driven by a motor 2. The steel tube is rotated by driving rollers, cutting current is flowed to a plasma torch 4 as a cutting machine to cut the steel tube over the whole periphery indicated by an imaginary line. A cut member 1a on the idle side is supported rotatably by support rollers 5. At the neighborhood of the cut position, a touch roller 7 pivoted at a projecting end of the rod of an air cylinder 6 is pushed to the outer peripheral surface of the material on the idle end side so that it can roll. A pulse detector 8 is connected with this touch roller to detect the rotational speed of the member on the idle end side and to form a detecting device for completion of cutting. In this way, it is possible to automatically operate the cutting device and to perform a safe operation.

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