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1. 发明专利

JPH0679471A ELECTRIC RESISTANCE WELDING EQUIPMENT IN SPIRAL STEEL TUBE 失效
公开(公告)号：JPH0679471A
公开(公告)日：1994-03-22
申请号：JP23966492
申请日：1992-09-08
申请人： NIPPON STEEL CORP , NITTETSU PLANT DESIGNING CORP
发明人： MASHIMA HIROYOSHI , MORI YASUNORI , TANAKA KAZUHIRO , KITAZATO TAKESHI
IPC分类号： B21C37/12 , B23K11/00 , B23K11/08 , B23K13/04
摘要： PURPOSE:To obviate a flashing phenomenon at the time of electric resistance weeding, and to decrease a welding defect by enlarging an apex angle by pushing up a coil edge of a spiral steel tube side. CONSTITUTION:When a distance between one coil edge of a steel belt coil 8 and the other coil edge of a spiral steel tube 1 opposed thereto, a distance to a welding point 6 therefrom, and an angle (apex angle) consisting of the welding point 6 and both the coil edges are denoted as C, L, and theta, respectively, thetaderived by the expression is adjusted so as to become a wider angle than before. The apex angle is enlarged by using a pipe holding-don roll, and by pushing up locally the coil edge on the side of the spiral steel tube 1 from downward immediately before welding.

2. 发明专利

JPH0687083A ELECTRIC RESISTANCE WELDING EQUIPMENT FOR SPIRAL STEEL PIPE 失效
公开(公告)号：JPH0687083A
公开(公告)日：1994-03-29
申请号：JP23966592
申请日：1992-09-08
申请人： NIPPON STEEL CORP , NITTETSU PLANT DESIGNING CORP
发明人： MASHIMA HIROYOSHI , TANAKA KAZUHIRO , MORI YASUNORI , KITAZATO TAKESHI
IPC分类号： B21C37/12 , B23K13/04
摘要： PURPOSE:To eliminate the generation of flashing and improve the welding quality by providing a coil side press roll to push down the steel strip side coil edge and extend an angle shown by the formula on the position right before welding in electric resistance welding of the spiral steel pipe. CONSTITUTION:A steel strip 1 is wound spirally, the steel strip side coil edge and the steel pipe side coil edge are pressed to perform electric resistance welding and the spiral steel pipe 1 is produced. The coil side press roll 9 to push down the steel strip side coil edge and extend the angle theta sown by the formula I is provided on the position right before welding. Consequently, the generation of flashing at the electric resistance welding which has been generated due to the fact that it has been performed at a narrow angle while depending on forming of the spiral steel pipe on an angle (apex angle) formed by both edges of the steel strip in the past is eliminated, weld defects are greatly reduced and the welding efficiency and the welding quality can be improved.

3. 发明专利

JPH0647433A DEVICE FOR FORMING COIL EDGE PRELIMINARILY 失效
公开(公告)号：JPH0647433A
公开(公告)日：1994-02-22
申请号：JP20772892
申请日：1992-08-04
申请人： NIPPON STEEL CORP
发明人： TANAKA KAZUHIRO , NARUSE TOMOFUMI , MURASE AKINORI , HIROKAWA TOSHIO
IPC分类号： B21C37/083 , B21C37/12 , B21D5/12
摘要： PURPOSE:To preliminarily form a coil edge surely without taking a space by bending the coil edge part passing between two upper and lower pinch rolls in the upper direction previously before bending to feed the coil in the manufacture of a spiral steel tube. CONSTITUTION:The steel strip 1 comes to the pinch rolls 6 after it passes a welding machine 4 for joining coils and a milling device 5 for cutting a groove. The pinch rolls 6 clamp the steel strip 1 vertically to unwind the steel strip 1 and to send it to a forming part. The steel strip 1 is sent by the pinch rolls 6 into three rows of forming rolls 7 to be formed in a spiral state and a preceding side edge 8 and a succeeding other side edge 9 are welded as they thrust each other. An upper pinch roll 10 facing the coil edge part is worked in a convergent taper and a lower pinch roll 11 is worked in a divergent taper to form upper and lower pinch roll profiles which can form the coil edge part preliminarily in the upper direction.

4. 发明专利

JPH0639431A MANUFACTURE OF SPIRAL STEEL TUBE 失效
公开(公告)号：JPH0639431A
公开(公告)日：1994-02-15
申请号：JP17726192
申请日：1992-07-06
申请人： NIPPON STEEL CORP
发明人： MASHIMA HIROYOSHI , MORI YASUNORI , TANAKA KAZUHIRO , NARUSE TOMOFUMI
IPC分类号： B21C37/12 , B21C37/30 , B23K9/032 , B23K9/173 , B23K37/08 , B23K101/06
摘要： PURPOSE:To prevent the generation of slag and to easily obtain a spiral steel tube at high speed by arranging both edges of a coil to be welded closely to each other in an overlapping manner and performing a gas metal arc welding after an electric resistance welding. CONSTITUTION:A steel strip with the edges prepared in advance is spirally wound, and right before A where one edge side is met with the other side edge with a minus gap, the side edges are made to be a welded or semi-welded state by means of a high frequency heating. After the metal squeezed out at the abutting part is pressed with an upper and a lower roll, welding is performed on the inside surface in B by the gas metal arc welding. Then, in C, the bead for the inside surface welding is machined with a milling cutter; in D, the outside surface is welded by the gas metal arc welding; continuously in E, the bead for the outside surface welding is machined with the milling cutter; and the spiral steel tube is obtained. Consequently, no slag is generated, and the improvement in workability and environment is attained.

5. 发明专利

JP2000001214A TAKE-OUT DEVICE FOR LONG MATERIAL WHILE TRAVELING 失效
公开(公告)号：JP2000001214A
公开(公告)日：2000-01-07
申请号：JP16679298
申请日：1998-06-15
申请人： NIPPON STEEL CORP
发明人： TANAKA KAZUHIRO , MINAMI HIDEYASU , MAEDA YOICHI
IPC分类号： B65G47/53 , B21B39/00 , B21B43/04 , B65G47/84 , C21D1/00
摘要： PROBLEM TO BE SOLVED: To take out a traveling long material independently of the size of the long material and reduce the cost of the device by rotating a rotor where variable-width long material receiving gap portions are formed at designated intervals, and taking a traveling material in the gap portion and releasing the same in the lateral direction. SOLUTION: When a traveling material receiving gap 14 of a rotor 13 driven by a servo motor reaches the top face 12a of a traveling table 12, a traveling material 11a traveling a contained angle made between the top face 12a of a traveling table 12 and the peripheral surface 13a of a rotor 13 is taken in the gap portion 14 by its gravity while it passes there. Subsequently, with the rotation of the rotor 13, the traveling material 11a is carried as shown by 11b, 11c, 11d to be remote from the traveling table 12 and when the material reaches the opposite side 11d to the traveling table 12, it is released to a cooling floor. In the case where the diameter of the traveling material 11a is small, the space of the gap portion 14 is narrowed by an adjusting member 16. Thus, even with a small-capacity motor, the speed of passing the gap portion 14 can be controlled to a desired speed.

6. 发明专利

JPH07127774A STEEL PIPE FITTING 失效
公开(公告)号：JPH07127774A
公开(公告)日：1995-05-16
申请号：JP27464693
申请日：1993-11-02
申请人： NIPPON STEEL CORP
发明人： MIYAJIMA YOSHIHIRO , SASAKI YUKIO , TANAKA KAZUHIRO , MASHIMA HIROYOSHI , KAYAZONO YOSHIHISA , KATAOKA RYUICHI
IPC分类号： F16L21/02 , F16L21/04
摘要： PURPOSE:To improve positioning and sealing for a sheath pipe by inserting the opposite end parts of a pair of opposite main pipes in the interior of a sheath pipe to be butted to each other, and deforming a corrugated packing interposed between the end parts like a cone shape to generate surface pressure at the edge part and the valley part. CONSTITUTION:In order to connect a pair of opposite main pipes 1, 2 to each other, the opposite end parts thereof are inserted in the interior of a sheath pipe 3 and butted to each other. At this time, angular packing holding rings 9 are fixed to fixed stoppers 5 disposed on both end parts of the sheath pipe 3 by bolts 8. Slide packing force-in rings 7 are fitted to the forward ends of both main pipes 1, 2. A fixed packing force-in ring 6 as a stopper is welded on the sheath pipe 3. Further, a corrugated packing 4 is inserted in a gap between the angular packing holding ring 9 and the slide packing force-in ring 7. The corrugated packing 4 is deformed at the central part of a bent groove to swell the angular part, so that surface pressure is generated at the edge part and the valley part.

7. 发明专利

JPH08318372A WEAR DISCRIMINATING METHOD AND DEVICE THEREFOR OF IGNITION TIP OF GAS SHIELDED WELDING MACHINE 失效
公开(公告)号：JPH08318372A
公开(公告)日：1996-12-03
申请号：JP12770995
申请日：1995-05-26
申请人： NIPPON STEEL CORP , TAIHEI KOGYO KK
发明人： FUKUCHI HIROSHI , NAKAJIMA ATSUSHI , TANAKA KAZUHIRO , OGAWA SHIN
IPC分类号： B23K9/26 , B23K9/10 , B23K9/12 , B23K9/127 , B23K9/32
摘要： PURPOSE: To appropriately discriminate wear of an ignition tip by preventing instability of welding due to wear of an arcing tip of a gas shielded arc welding machine so as to improve welding quality. CONSTITUTION: An gas shielded arc welding machine, in which welding is executed while a core wire is fed, DC voltage is impressed between a core wire and object to be contacted and a shield gas is blown, consists of a welding current detecting device 11, a core wire feed motor current detecting device 13, a storing part 14 to store the max variation width of both detected values in fixed time, comparators 15a, 15b to compare the difference between respective max value and min value to the threshold value set respectively and a discriminating part 15 to discriminate the wear of tip based on the compared result. The measured value in fixed time during welding is detected/stored and the max variation width therein is obtained, also, concerning a core wire feed motor load current, the same variation widths are obtained and compared as to whether both variation widths exceed the respective threshold values set beforehand or not, based on the compared result, the wear of tip is discriminated in high precision.

8. 发明专利

JPH08252667A WELDING EQUIPMENT FOR STEEL PIPE PILE 失效
公开(公告)号：JPH08252667A
公开(公告)日：1996-10-01
申请号：JP8457195
申请日：1995-03-17
申请人： NIPPON STEEL CORP
发明人： YOSHIDA YUKIO , TANAKA KAZUHIRO , YAMAGUCHI MASANOBU
IPC分类号： E02D5/08 , B23K9/00 , B23K9/028 , B23K9/12 , B23K9/127 , B23K9/16
摘要： PURPOSE: To improve the productivity by providing a plurality of welding equipment on each joint side across the tubular axis of the steel pipe pile to achieve the welding at appropriate and individual welding speed to reduce the welding defects and the cost of the welding material. CONSTITUTION: A welding equipment 4 is arranged and traveled at high speed to the welding starting position with the reference position (a) as a starting point based on the preliminarily inputted information on the joint type of the steel pipe pile, the length of the right and left joints, the position from the end face of the mother tube, etc. A welding torch 4-2 is automatically set to the angle of dive, the angle of inclination, the welding current and voltage, and the individual welding speed based on the information on the preliminarily inputted joint type. Each welding equipment 4 is automatically stopped when the welding of the individual welding length is completed, each welding torch 4-2 is moved to the position of a spatter removing equipment (wire brush) 4-9 for the welding of the rear side to remove the spatter. After sensing the joint seam, the welding of the rear side is started. After the welding of the rear side is completed, the next steel pipe pile is prepared for the welding, and a traveling truck is retracted at the same time, and the welded steel pipe pile is carried out.

9. 发明专利

JPH01306588A TREATMENT OF COILED PRODUCT WITH LIQUID 失效
公开(公告)号：JPH01306588A
公开(公告)日：1989-12-11
申请号：JP13287288
申请日：1988-06-01
申请人： NIPPON STEEL CORP
发明人： MATSUKUMA HITOSHI , TANAKA KAZUHIRO , YAMAZAKI TAKESHI
IPC分类号： C23G3/00
摘要： PURPOSE:To shorten the time required to treat a coiled product and to prevent the occurrence of unevenness in quality after treatment by putting a drum in the product, immersing part of the product in a treating soln. and turning the drum and the product. CONSTITUTION:A drum 2 is passed through by the ring of a coiled product 1 and set on turning rolls 3 arranged near the upper edge of a treatment vessel 4. Part of the product 1 is immersed in a treating soln. 5, the rolls 3 are turned and this turning force is applied to the drum 2 and the product 1 to turn the product 1 in the soln. 5. Flanges 6 for dropping the soln. and preventing walking are fitted to the drum 2. The size of the treatment vessel can be made small and the cost of equipment can be reduced.

10. 发明专利

JPS63180625A MACHINE FOR STACKING STEEL PIPES AND FOR FORMING PIPES INTO HEXAGONAL SHAPE 失效
公开(公告)号：JPS63180625A
公开(公告)日：1988-07-25
申请号：JP1195087
申请日：1987-01-21
申请人： SANKYU KK , NIPPON STEEL CORP , ITO IND
发明人： TANAKA KAZUHIRO , EGUCHI MASANOBU , ISHIBASHI TAKAHIRO
IPC分类号： B65G57/18
摘要： PURPOSE:To obtain a machine for stacking steel pipes and for forming those into a hexagonal shape by providing substantially vertical and movable stoppers in the front and rear of an elevating frame for carrying steel pipes or the like, by providing a front frame which is replaceable with the stoppers and adapted to be receive the forward sections of the steel pipes in an inclined condition, and by providing a rear frame which is vertically and longitudinally movable and adapted to receive the rear end parts of the steel pipes in the inclined condition. CONSTITUTION:When steel pipes 2 or the like are stacked one upon another in a rectangular shape having the vertical front and rear surfaces, the steel pipes 2 or the like adapted to be stacked on an elevating frame 3 are positioned at their forward end by stoppers 4 which are longitudinally movable. Thereafter, the steel pipes are stacked one upon another in a substantially vertical rectangular shape while they are prevented from being dropped forward. Further, when the steel pipes 2 or the like are formed into a hexagonal shape, front and rear frames 5, 6 position the front and rear ends of the steel pipes while they regulate the inclinations of the front and rear sections of the pipes so that the steel pipes 2 and the like are successively stacked on the elevating frame 3. Thus, it is possible to stack the steel pipes and as well to form the steel pipes into a hexagonal shape by use of one and the same machine.

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