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51. 发明专利

JPH0693378A PREHEATING/POSTHEATING OMISSION TYPE 1.25CR-0.5MO STEEL TUBE AND ITS WELDING METHOD 失效
公开(公告)号：JPH0693378A
公开(公告)日：1994-04-05
申请号：JP10376892
申请日：1992-03-31
申请人： NIPPON KOKAN KK
发明人： TAKAMURA TOSHIHIRO , NISHINO YUKIO , OYAMA MOTOAKI , MATSUSHITA AKIYOSHI
IPC分类号： B23K9/23 , C22C38/00 , C22C38/22
摘要： PURPOSE:To enable arc welding with covered electrode by eliminating preheating and postheating treatments by prescribing the range of contents of C, Mn, P, S, of Cr-Mo steel and tube stock thickness. CONSTITUTION:1.25Cr-0.5Mo steel tube has a composition consisting of, by weight, 0.03-0.10% C, 0.50-1.00% Si, 0.0-0.60% Mn,

52. 发明专利

JPH05287464A 失效
公开(公告)号：JPH05287464A
公开(公告)日：1993-11-02
申请号：JP11317992
申请日：1992-04-07
申请人： NIPPON KOKAN KK , TOSHIBA ENG & CONSTR
发明人： TAKAMURA TOSHIHIRO , NISHINO YUKIO , TERAOKA KOZO , OYAMA MOTOAKI , AKIYAMA KOJI , ARIMA TAKEO
IPC分类号： B23K9/23 , C22C38/00 , C22C38/22
摘要： PURPOSE:To omit preheating treatment and postheating treatment at the time of welding to a steel tube of the same kind and a joint by producing a steel tube by means of TIG welding by using a steel plate of specific thickness prepared by controlling respective contents of C, Mn, P, S, etc., in a Cr-Mo steel. CONSTITUTION:A steel plate of

53. 发明专利

JPH0433547B2 失效
公开(公告)号：JPH0433547B2
公开(公告)日：1992-06-03
申请号：JP26750986
申请日：1986-11-12
申请人： NIPPON KOKAN KK
发明人： NISHINO YUKIO , SAWA MIKIO , SAIJO YOSHIO
IPC分类号： B23K9/127 , B23K9/12

54. 发明专利

JPH0327287B2 失效
公开(公告)号：JPH0327287B2
公开(公告)日：1991-04-15
申请号：JP3379682
申请日：1982-03-05
申请人： NIPPON KOKAN KK
发明人： YAZAWA KOJI , HIRATA KENICHI , NISHINO YUKIO , OKAMOTO SHOSUKE
IPC分类号： B21C37/08 , B21C37/12

55. 发明专利

JPH0248335B2 失效
公开(公告)号：JPH0248335B2
公开(公告)日：1990-10-24
申请号：JP12160083
申请日：1983-07-06
申请人： NIPPON KOKAN KK
发明人： YAZAWA KOJI , HIRATA KENICHI , NISHINO YUKIO , ITOJIMA KANJI , SASAKI TAKAHARU
IPC分类号： B21D39/20

56. 发明专利

JPS6092015A MANUFACTURE OF STEEL TUBE BY UOE SYSTEM 失效
公开(公告)号：JPS6092015A
公开(公告)日：1985-05-23
申请号：JP19752683
申请日：1983-10-24
申请人： NIPPON KOKAN KK
发明人： MIHARA YUTAKA , TAIRA TADAAKI , TAKEHARA JIYUNICHIROU , AOYANAGI KENJI , NISHINO YUKIO , TOZAWA YASUHISA , KAWADA KATSUMI
IPC分类号： B21C37/08
摘要： PURPOSE:To reduce press load of O-forming and to obtain a product of good roundness by selecting acting angle of forming force to a material plate at the time of O-forming and preceding end part bending radius within a proper range. CONSTITUTION:In O-forming that follows U-shape bending forming of a thick material plate, the O-forming is stopped at acting angle of forming force to the material plate above -45 deg. and within the range in which circumferential compression is not applied. At the same time, the radius of end part bending applied to the end of the material plate prior to O-forming is selected within allowable limit of peaking between end parts of the material at the time of O- forming. After O-forming and tacking and welding of end parts, the tube is expanded at specified expansion ratio and corrected to roundness. An objective large thick steel tube can be manufactured at low cost by this process.

57. 发明专利

JPS59199117A Manufacture of steel pipe by uoe-system 失效
标题翻译：通过UOE系统制造钢管
公开(公告)号：JPS59199117A
公开(公告)日：1984-11-12
申请号：JP7397083
申请日：1983-04-28
申请人： Nippon Kokan Kk
发明人： MIHARA YUTAKA , TAIRA TADAAKI , TAKEHARA JIYUNICHIROU , AOYANAGI KENJI , NISHINO YUKIO , TOZAWA YASUHISA , KAWADA KATSUMI
IPC分类号： B21C37/08 , B21D5/01 , B21D41/02
CPC分类号： B21D5/015
摘要： PURPOSE:To manufacture an UOE-system steel pipe by a small press duty by U- forming a blank plate having properly bent ends and further, O-forming it by regulating an acting angle of forming force within a range of giving no circumferential compression, before welding, expanding, and straightening a formed plate. CONSTITUTION:A blank plate 10 is U-formed after subjecting the ends of plate 10 to an end bending by regulating a bending radius (rc) at the end parts within an allowable range of peaking between the end parts of plate 10 at the time of O-forming, or regulating it preferably to the degree of (rc)/R=0.62-0.75 with respect to the radius R of a desired steel pipe. Next, a welding is performed by restricting the O-forming within a range, where an acting angle of forming force with respect to the plate 10 is >=-45 deg. and gives no circumferential compression. Next, the out of roundness of a welded pipe is straightened while expanding it with a small expanding rate to obtain a steel pipe having a desired radius, thus a duty of forming press necessary for performing the O-forming in a UOE-system steel-pipe manufacturing is remarkably reduced.
摘要翻译：目的：通过U形成具有适当弯曲端的空白板，并通过调节在不产生周向压缩的范围内的成形作用角来进行O形成，通过小压模制造UOE系统钢管，在焊接，膨胀和矫直成形板之前。构成：在板10的端部经过端部弯曲处理之后，通过将端部处的弯曲半径（rc）调节在板10的端部之间的峰值的允许范围内，在板10的时间 O形成，或者相对于期望的钢管的半径R优选调节到（rc）/ R=0.62-0.75的程度。接下来，通过将O形成限制在相对于板10的成形力的作用角> 45度的范围内进行焊接。并且不产生周向压缩。接下来，在扩大膨胀率的同时使焊接管的圆度变圆，得到具有所需半径的钢管，因此在UOE系钢 - 钢管中进行O形成所需的成型冲压负荷，管道制造显着减少。

58. 发明专利

JPS5930487A Continuous tack welding device for straight seam welded steel pipe 失效
标题翻译：用于直缝焊接钢管的连续焊接装置
公开(公告)号：JPS5930487A
公开(公告)日：1984-02-18
申请号：JP14096582
申请日：1982-08-16
申请人： Nippon Kokan Kk
发明人： YAZAWA KOUJI , ISHIHARA TOSHIROU , KAZAMA SHINICHI , NISHINO YUKIO , ITOJIMA KANJI , NAGANUMA HISAO , HIRANO OSAMU
IPC分类号： B23K9/025
CPC分类号： B23K9/0253
摘要： PURPOSE:To perform continuous tack welding at a high speed with good efficiency, by constituting an upper clamping body of a pair of light and left opening/closing type clamps which are separated at the center and opening successively the same when a welding head moves to approach the clamps. CONSTITUTION:A pipe P which is loaded in a machine frame 1 is so seamed that an open seam part P1 is positioned right above. A bolster 4 moves upward to lift the pipe P with a lower clamping body, thereby sandwiching the pipe between the same and an upper clamping body 6. When a welding head 13 moves to approach the position of the body 6, right and left opening/closing clamps 7, 8 open successively at the gap G that permits the movement and passage of the head 13 to permit continuous tack welding. The pipe P subjected to the tack welding is unloaded on conveyance rolls as the bolster 4 descends, and is discharged to the outside of the frame 1.
摘要翻译：目的：为了高效率地进行高速连续定位焊，通过构成一对光和左打开/闭合型夹具的上夹持体，它们在焊接头移动到中心时分开并相继开启接近夹子构成：装载在机架1中的管P如此被缝合，使开缝部P1位于正上方。枕头4向上移动以用下夹持体提升管P，从而将管夹在相同的上夹具6之间。当焊头13移动到接近主体6的位置时，右开和/ 关闭夹具7,8在间隙G处依次打开，允许头部13的移动和通过以允许连续定位焊接。经过定位焊接的管P随着垫板4的下降而在输送辊上卸载，并被排出到框架1的外部。

59. 发明专利

JPS58151913A PRODUCTION OF SPIRAL STEEL PIPE 失效
公开(公告)号：JPS58151913A
公开(公告)日：1983-09-09
申请号：JP3379682
申请日：1982-03-05
申请人： NIPPON KOKAN KK
发明人： YAZAWA KOUJI , HIRATA KENICHI , NISHINO YUKIO , OKAMOTO SHIYOUSUKE
IPC分类号： B21C37/08 , B21C37/12
摘要： PURPOSE:To produce a spiral steel pipe having high dimensional accuracy adequately, by forming a material into a pipe of a smaller value in consideration of the rate of bulging in the stage of a hydrostatic test, expanding the same with a die formed with spiral grooves only in the end part of the pipe and subjecting the pipe to the hydrostatic test. CONSTITUTION:A pipe expander 25 is provided in front of a roll conveyor 24, and a cone 28 is mounted in a pipe expanding die 29. The entry of the end of a pipe therein is detected with a detector 26 and the cone 28 is drawn into the die 29 by a draw bar 27 provided in a cylinder 23, whereby the die 29 is expanded to expand only the end part of the pipe. The pipe is then subjected to a hydrostatic test.

60. 发明专利

JPS5451087A APPARATUS FOR REMOVING TAB FROM WELDED STEEL PIPE 失效
公开(公告)号：JPS5451087A
公开(公告)日：1979-04-21
申请号：JP11718677
申请日：1977-09-29
申请人： NIPPON KOKAN KK
发明人： NUKAGA MASAYOSHI , TAKAHASHI KEIJI , NISHINO YUKIO , YAZAWA KOUJI , SEN SABUROU
IPC分类号： B26F3/00
摘要： PURPOSE:To mechanically remove an inner bead, an axialy extending tab or the like which will be resulted by a stage wherein outer and inner surfaces of a welded steel pipe are subjected to welding. CONSTITUTION:A column 2 is mounted on a table 1 such that the column 2 is movable in a horizontal direction and in a vertical direction and to a front portion of the column is installed a horizontally movable spindle 3 which is driven to rotate. the spindle 3 is provided with a tap blow apparatus 6 and an inner surface grinding device 4 and a grooving device 5 both of which are coaxial with the spindle 3. The apparatus 6 is vertically driven below the spindle 3. By moving the column 2, and moving vertically and rotaing the spindle 3, a tab of a welded tube is notched, a blow is given to the tab to break it and thereafter an inner bead in the tube is removed over a desired length by automatic grinding.

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