公开(公告)号：JP2006136911A

公开(公告)日：2006-06-01

申请号：JP2004327317

申请日：2004-11-11

Applicant: Hitachi Ltd ,  株式会社日立製作所

Inventor： YANAGIDA NOBUYOSHI ,  SAITO NOBORU ,  HAYASHI SHOJI ,  SUGANO SATOSHI ,  ENOMOTO KUNIO ,  HANEDA MITSUAKI ,  KOIDE HIROO

IPC: B23K9/028 ,  B23K9/00 ,  B23K9/23 ,  B23K31/00 ,  B23K101/06

Abstract: PROBLEM TO BE SOLVED: To provide a tube welding method and a tube welding device capable of enhancing the corrosion resistance by exerting the compressive residual stress in the axial direction in a weld metal portion on an inner face of a tube in the connection by welding tubes of large tube thickness to each other.
SOLUTION: After root passes of tubes are welded, the surface of the tubes is quenched by spraying cooling water in the stage of high temperature immediately after the molten metal is solidified behind a torch to perform the welding on the outer surface of the tubes while cooling the inner surface by allowing cooling water to flow on the inner surface of the tubes. The compressive stress is generated on the outer surface side of the tubes to suppress generation of shrink-deformation in the circumferential direction of the tubes, and generate the compressive residual stress as the residual stress in the axial direction of the inner surface of the tube.
COPYRIGHT: (C)2006,JPO&NCIPI

Abstract translation: 要解决的问题：提供一种管焊接方法和管焊装置，其能够通过在连接中的管的内表面上的焊接金属部分中施加轴向的压缩残余应力来提高耐腐蚀性 通过焊接较大管厚度的管彼此。

解决方案：焊管根管通过之后，在熔融金属固化在焊炬后立即在高温阶段喷洒冷却水来淬火管表面，以在焊接的外表面上进行焊接 同时通过允许冷却水在管的内表面上流动而冷却内表面。 在管的外表面侧产生压缩应力，以抑制管的圆周方向的收缩变形的产生，并且产生作为管的内表面的轴向的残留应力的压缩残余应力。 版权所有（C）2006，JPO＆NCIPI

公开(公告)号：JP2005021939A

公开(公告)日：2005-01-27

申请号：JP2003189940

申请日：2003-07-02

Applicant: Hitachi Ltd ,  Hitachi Maxell Ltd ,  日立マクセル株式会社 ,  株式会社日立製作所

Inventor： IMANAGA AKIYOSHI ,  HANEDA MITSUAKI ,  INAGAKI MASATOSHI ,  WATANABE OSAMU ,  SOMATOMO YOSHIKI ,  HIRASAWA SHIGEKI

IPC: B23K9/167 ,  B23K9/02 ,  B23K9/29

Abstract: PROBLEM TO BE SOLVED: To provide a seal welding method for a small diameter hole, by which the small diameter hole provided on the surface of a metal plate of a small article can be easily welded in a short time and can be surely and completely sealed, and a high quality welding part with the smooth surface after welding can be obtained, and to also provide its automatic welding device. SOLUTION: The seal welding method is composed so as to seal the small diameter hole by inserting a sealing plug 3 to the small diameter hole 4 provided on the surface of a metal base material 2 which is a lid plate or a flat plate of a container 1 for the small article. A circular or polygonal thin wall thickness part 5b, in which the vicinity of the small diameter hole is in a plane shape, is formed on the rear face side of the metal base material. A circular or polygonal overhanging part 3a, whose outer diameter is larger than the inner diameter of the small diameter hole, is formed to the head part of the sealing plug. The seal welding is executed by melting the sealing plug and the thin wall thickness part of the metal base material by an arc heat source from a welding torch after inserting the sealing plug into the small diameter hole. COPYRIGHT: (C)2005,JPO&NCIPI

Abstract translation: 要解决的问题：为了提供一种小直径孔的密封焊接方法，通过该密封焊接方法可以在短时间内容易地焊接小型制品的金属板的表面上的小直径孔，并且可以肯定地 并完全密封，可以获得焊接后光滑表面的优质焊接部件，并提供自动焊接装置。 解决方案：密封焊接方法是通过将密封塞3插入到设置在作为盖板或平板的金属基材2的表面上的小直径孔4上来密封小直径孔 的小物品的容器1。 在金属基材的背面侧形成有圆形或多边形的薄壁部5b，其中小直径孔附近为平面形状。 在密封塞的头部形成有外径大于小直径孔的内径的圆形或多边形突出部3a。 在将密封塞插入小直径孔之后，通过来自焊炬的电弧热源将金属基材的密封塞和薄壁部分熔化，进行密封焊接。 版权所有（C）2005，JPO＆NCIPI

公开(公告)号：JP2000246441A

公开(公告)日：2000-09-12

申请号：JP5509499

申请日：1999-03-03

Applicant: HITACHI LTD

Inventor： SHIBATA NOBUO ,  SAITO NOBORU ,  HANEDA MITSUAKI ,  WADA TAKESHI ,  OI YASUKATA

IPC: H04N5/225 ,  B23K9/095 ,  B23K9/127 ,  G06T1/00 ,  G06T7/00 ,  H04N7/18

Abstract: PROBLEM TO BE SOLVED: To clearly monitor an arc beam, molten pool, grooves and a torch by taking in a groove image at a first shutter speed when the arc is off, executing addition for each pixel of the two-dimensional array, showing it in a monitor and taking in the pixel at a second shutter speed for conversion processing at the time of welding. SOLUTION: Before the start of welding, a power source 5 for driving a light source is turned on by a signal from an external interface 21, and the shutter speed of the control circuit 6 of a two-dimensional light receiving means is set at a first speed, so that the image of a groove is taken in. This image is added successively for each pixel of the same coordinate of the two-dimensional array (X, Y) between plural sheets of image. The final image data thus added are data-converted and outputted to a monitor TV for display. During the welding, the power source 5 for driving the light source is turned off, and the shutter speed of the control circuit 6 of the two-dimensional light receiving means is set at a second speed, so that the image of a groove is taken in. This image data are converted and outputted to the monitor TV for display.

公开(公告)号：JP2000246440A

公开(公告)日：2000-09-12

申请号：JP5509399

申请日：1999-03-03

Applicant: HITACHI LTD

Inventor： SHIBATA NOBUO ,  SAITO NOBORU ,  HANEDA MITSUAKI ,  WADA TAKESHI ,  TAMAI YASUKATA

IPC: H04N5/225 ,  B23K9/095 ,  B23K9/127

Abstract: PROBLEM TO BE SOLVED: To clearly monitor an arc during welding, molten pool, grooves in the periphery and a welding torch by photographing a weld zone with a two-dimensional light receiving means which is equipped with a beam shaping plate and an interference filter, in front of a means for emitting a laser beam by which the weld zone and its proximity are irradiated. SOLUTION: A laser beam emitting head 2 is equipped with a lens system in such a manner that a laser beam outgoing from an optical fiber cable 3 has a proper spread in the arc generating part 13. A beam shaping plate 8 is arranged integrally with the laser beam emitting head 2, while an interference filter 5 is arranged integrally with a two-dimensional light receiving means 4. The laser beam emitting head 2 and the two-dimensional light receiving means 4 are attached integrally with a welding torch 12 in the front in the welding direction. In observing with the interference filter 5 disposed in front of a CCD camera, the transmitting center wavelength is slightly different between the center of the screen and the periphery; therefore, in order to avoid this effect, it is recommended to use the interference filter 5 having a small half band width of the transmitting wavelength.

公开(公告)号：JP2000024780A

公开(公告)日：2000-01-25

申请号：JP19434398

申请日：1998-07-09

Applicant: HITACHI LTD

Inventor： SAKANASHI TAKAFUMI ,  MIZUTANI KANJI ,  HANEDA MITSUAKI

IPC: B23K9/167 ,  B23K9/29

Abstract: PROBLEM TO BE SOLVED: To provide the TIG welding torch which easily conducts weaving welding for an inner face of a narrow part and is easily produced at a low manufacturing cost. SOLUTION: The TIG welding torch is constructed so that a shield gas is caused to flow around an electrode bar 21 fixed to a torch main body 20, an arc is generated between the electrode bar 21 and a base metal, a cooling medium is circulated in the torch main body 20, welding is done while cooling the electrode bar 21 and its surrounding. In the welding torch, the torch main body 20 is a slender shape, while a cross sectional shape of its biggest part is formed to roughly round, an electrode fixing part 24 is arranged inside the torch main body 21, by mounting a bolt 25, which presses the electrode bar 21 to the electrode fixing part 24, to a torch main body tip and by holding the electrode bar 21 with the electrode fixing part and the bolt 25, the electrode bar 21 is fixed to the torch main body 20.

公开(公告)号：JPH11129071A

公开(公告)日：1999-05-18

申请号：JP29669697

申请日：1997-10-29

Applicant: HITACHI LTD

Inventor： SAITO NOBORU ,  HANEDA MITSUAKI

IPC: B23K9/167 ,  B23K9/095 ,  B23K9/12

Abstract: PROBLEM TO BE SOLVED: To omit an adjustment operation of the welding bead height near a final layer by controlling a feed volume and a welding speed of a welding wire while the variation of weaving amplitude is used as a controllable factor so as to make the height constant. SOLUTION: The variation of weaving amplitude L is detected by a weaving amplitude detecting device 17. The detected weaving amplitude L is fed to a general control device 14. The general control device 14 substitutes the detected weaving amplitude L to a welding wire feed speed calculating formula which is set and memorized in advance, so as to work out the welding wire feed speed. The command is sent to a welding wire feed speed control device 9 to change the calculated welding wire feed speed Vf. The welding wire feed speed control device 9 receiving the command for changing, controls the welding wire feed device 8 and changes the welding wire feed speed to Vf. The general control device 14 carries out the process repeatedly until the welding is finished, so as to make the welding bead height constant at the time of welding.

公开(公告)号：JPH10314942A

公开(公告)日：1998-12-02

申请号：JP13188297

申请日：1997-05-22

Applicant: HITACHI LTD

Inventor： SAITO NOBORU ,  HANEDA MITSUAKI

IPC: B23K9/167 ,  B23K9/12

Abstract: PROBLEM TO BE SOLVED: To omit welding wire feeding aligning work by applying voltage between a welding wire and a base metal and between the welding wire and a non-consumable electrode to monitor voltage or current and transferring a welding wire feeding guide to an optional position after detecting the position of the tip end of the welding wire. SOLUTION: Contact between the welding wire 4 and the base metal 9 is detected by feeding the welding wire 4 and monitoring the voltage between the welding wire 4 and the base metal 9 or the current of a voltage applying circuit, and the welding wire 4 is stopped to feed. The feeding wire 4 is pulled back by a given quantity S1. A welding wire feeding guide transferring stage 7 is transferred toward the non-consumable electrode 2, contact between the welding wire 4 and the non-consumable electrode 2 is detected by monitoring the voltage between the welding wire 4 and the non-consumable electrode 2 or the current of the voltage applying circuit, and the welding wire feeding guide transferring stage 7 is stopped to transfer. The welding wire feeding guide transferring stage 7 is retreated by a given quantity, the welding wire 4 is pulled back a given quantity S2 and set to the suitable wire feeding position at the time of starting welding.

公开(公告)号：JPH09101120A

公开(公告)日：1997-04-15

申请号：JP25622695

申请日：1995-10-03

Applicant: HITACHI LTD

Inventor： SHIBATA NOBUO ,  NAKAJIMA YOSHIO ,  KIKUCHI HIRONARI ,  IMANAGA AKIYOSHI ,  HANEDA MITSUAKI ,  KOBAYASHI MASAHIRO ,  UEHARA TAKEO ,  HINO EIJI

IPC: G01B11/02 ,  G01B11/24 ,  G06T7/00 ,  G06T7/60

Abstract: PROBLEM TO BE SOLVED: To detect the surface detect of a weld bead automatically, and evaluate the degree of the defect quantitatively by dividing a two-dimensional cut image into the line elements of plural straight lines to label the same, and extract line elements corresponding to machining portions so as to judge. SOLUTION: An irradiation optical unit control circuit 17 controls an irradiation optical unit 7 so as to irradiate a groove 6 with a slit-like ray 8. An observation optical unit 11 composed of a interference filter 9 and a two dimensional light receiving camera 10 picks up the image of an obtained optical cut line from above the groove 6. An image processing device 20 stores digital multi- value image data which is output from a light receiving camera control circuit 16 and is A/D-converted in a multi-value image storing portion 22, and simultaneously only a bright portion out of the multi-value image data is extracted by a binary processing portion 23. A processing portion 25 divides line elements containing curved portions into a line elements group of plural straight lines, labels the respective line elements and computes a feature amount representing the features of the labeled respective line elements so as to detect the shape and the size of a defect.

公开(公告)号：JPH08118017A

公开(公告)日：1996-05-14

申请号：JP25786694

申请日：1994-10-24

Applicant: HITACHI LTD

Inventor： NAKAJIMA YOSHIO ,  SHIBATA NOBUO ,  KIKUCHI HIRONARI ,  HANEDA MITSUAKI ,  IMANAGA AKIYOSHI ,  KOBAYASHI MASAHIRO ,  UEHARA TAKEO

IPC: G01B11/24 ,  B23K9/028 ,  B23K9/095 ,  B23K9/127 ,  B23K31/00 ,  G01N21/88 ,  G01N21/952

Abstract: PURPOSE: To excellently detect the defect of the weld bead in an automatic welding equipment having a defect detecting device to detect the defect of the weld bead. CONSTITUTION: An automatic welding equipment to perform the welding action to control the copying of the weld line of a welding torch 4 based on the information of a groove position detecting sensor 7 and a defect detecting action to detect and display the defect of the weld bead based on the information of a defect detecting sensor 8 is provided with an integrated control device 17 which divides the welding action and the defect detecting action in a time- sharing manner and realizes them. Because the defect is detected when a traveling truck is returned after the welding, the defect can be detected at the desired distance intervals. Because no welding light affects the detection of the defect, the defect can be reliably detected. The defect is detected slightly after the welding, and the defects such as the weld crack can be surely detected.

公开(公告)号：JPH07206310A

公开(公告)日：1995-08-08

申请号：JP33493593

申请日：1993-12-28

Applicant: HITACHI LTD

Inventor： OKADA RYOJI ,  HANEDA MITSUAKI ,  YAMADA TOSHIHIRO ,  AKUTSU HIROTO ,  SUGAWARA JIYUN ,  SHIGETA MASAYUKI ,  TANAKA MASAKATSU

IPC: B66B5/22

Abstract: PURPOSE:To cope with larger braking energy and to enable high speed operation by specifying the ratio of the maximum loaded weight for pressing braking pieces to a guide rail to the braking energy per one safety unit required for stopping a car. CONSTITUTION:A safeties device for safely stopping a car at the time of emergency comprises a pair of breaking pieces 9 clamping a guide rail 3 in the inside thereof, and the breaking pieces 9 are connected to a governor system for sensing the speed of the car by rods. When the car is lowered over a designated speed and the rotational frequency of a governor exceeds a designated value, the governor is stopped and the breaking pieces 9 are lifted through the rods to generate breaking force. In this case, the ratio of the maximum loaded weight (kg) for pressing the breaking pieces 9 to the guide rail 3, which is generated by an elastic body 13 to the braking energy (J) per one safety unit for stopping the cab at a decelerating speed below 9.8m/S on the average is set to 0.015 (kg/J) or less.