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1. 发明专利

JPS6097602A VOLTAGE NONLINEAR RESISTOR 失效
公开(公告)号：JPS6097602A
公开(公告)日：1985-05-31
申请号：JP20467183
申请日：1983-11-02
申请人： HITACHI LTD
发明人： SHIYOUJI MORITAKA , YAMAZAKI TAKEO , KOSUGI TETSUO
IPC分类号： H01C7/10 , C04B35/00 , C04B35/453

2. 发明专利

JPS56141985A WELDING METHOD 失效
公开(公告)号：JPS56141985A
公开(公告)日：1981-11-05
申请号：JP4350780
申请日：1980-04-04
申请人： HITACHI LTD
发明人： SATOU AKIRA , MIYAKE HIROSHI , OGURA SATOSHI , SHIYOUJI MORITAKA
IPC分类号： B23K9/23
摘要： PURPOSE:To enable welding without partial burn through by adjusting relative speed when making single phase welding repeatedly heating a material to be welded while moving relatively the material and a heat source. CONSTITUTION:A nonconsumable electrode 4 is installed on the weld zone of a material to be welded 8. A motor 1 for rotating the electrode is driven and transmitted to a gear 2 to rotate the electrode 4. Inert gas is sent into a chamber 5 from a gas charging port 6. At the same time, a pulse power source is turned on to generate an arc between the rotating electrode and the material to be welded 8 through an energizing bursh 3. The whole length of the weld zone is molten slowly from the surface and the reverse side of the weld zone is molten at the same time over the whole length of weld zone according to the welding conditions established beforehand.

3. 发明专利

JPS5671594A GAS SHIELD ARC WELDING METHOD 失效
公开(公告)号：JPS5671594A
公开(公告)日：1981-06-15
申请号：JP14646579
申请日：1979-11-14
申请人： HITACHI LTD
发明人： MIYAKE HIROSHI , SATOU AKIRA , SHIYOUJI MORITAKA , OGURA SATOSHI
IPC分类号： B23K9/16 , B23K9/00 , B23K9/028
摘要： PURPOSE:To weld two materials to be welded having concentric circles well without defects such as pinholes, by changing rotation of the electrode or materials to be welded from the positive direction to the inverse direction, in respect to circumferential face welding. CONSTITUTION:Welding is started with an arbitrary position on the welding line circumference as starting point 0 deg., and welding is performed in the same rotation direction till the welding start position. When the electrode or materials 1 and 2 to be welded reach point A, rotation of welding is inverted to change the welding direction, and welding is executed without stopping the arc. This arbitrary point A is determined by the arc time indicated by the ratio of the welding length of materials 1 and 2 to the welding speed. At arrival at this set value, the running truck is inverted, and the moving direction of a pair of electrodes for the torch is inverted to complete welding. By this method, the solidification speed of the fused metal becomes low, and gas shield arc welding without weld defects such as pinholes is possible.

4. 发明专利

JPS53119758A POWER SOURCE APPARATUS FOR HIGH FREQUENCY PULSE ARC WELDING 失效
公开(公告)号：JPS53119758A
公开(公告)日：1978-10-19
申请号：JP3446777
申请日：1977-03-30
申请人： HITACHI LTD
发明人： SHIYOUJI MORITAKA , ICHIUMI TOSHIHIRO
IPC分类号： B23K9/16 , B23K9/06 , B23K9/073 , B23K9/167
摘要： PURPOSE:Power source apparatus for lessening the arc breakage, carrying out good fusion and forming pure bead surface, by converting reverse polarity to direct current, at the time of carrying out polarity reversal type high frequency pulse arc welding of easily oxidizable metal, such as Al etc.

5. 发明专利

JPS53114051A TRANSISTOR CONTROLLING POWER SUPPLY 失效
公开(公告)号：JPS53114051A
公开(公告)日：1978-10-05
申请号：JP2792777
申请日：1977-03-16
申请人： HITACHI LTD
发明人： ICHIUMI TOSHIHIRO , SHIYOUJI MORITAKA
IPC分类号： G05F1/56
摘要： PURPOSE:To detect the distruction of transistors by setting up elements whose forward current is energized when it operates in the base circuit of the transistors and whose backward current is disconnected at transistor distruction.

6. 发明专利

JPS60219704A VOLTAGE NONLINEAR RESISTOR AND METHOD OF PRODUCING SAME 失效
公开(公告)号：JPS60219704A
公开(公告)日：1985-11-02
申请号：JP7584884
申请日：1984-04-17
申请人： HITACHI LTD
发明人： SHIYOUJI MORITAKA , YAMAZAKI TAKEO , KOSUGI TETSUO
IPC分类号： H01C7/10 , C04B35/00 , C04B35/453

7. 发明专利

JPS56122671A HIGHHFREQUENCY PULSE TIG WELDING METHOD 失效
公开(公告)号：JPS56122671A
公开(公告)日：1981-09-26
申请号：JP2662880
申请日：1980-03-05
申请人： HITACHI LTD
发明人： SHIYOUJI MORITAKA , SHIDA TOMOHIKO , USUKI JIYUICHIROU
IPC分类号： B23K9/16 , B23K9/073 , B23K9/09 , B23K9/167
摘要： PURPOSE:To perform high efficient and high-quality high-frequency pulse TIG welding especially on Al, by using the bar (-) current between the base metal and welding torch as the high-frequency pulse current and the bar (-) current as the single pulse current in which the single pulse at every plural number of pulse number in the above-mentioned pulse current is inverted. CONSTITUTION:In the welding current which is passed between welding base metal 6 composed especially of Al and welding torch 7 installed at the opposite side of base metal 6, bar minus current iSP is defined as a repeated high-frequency pulse current. On the other hand, bar plus current iRP is defined as the single pulse current in which one piece of pulse among 5-50 pieces pulse number of the above- mentioned high frequency pulse current is inverted, and thus the welding is performed. In this case, the current generated by constant-voltage regulated power supply 20 is transformed into a pulse by transistor bridge 21 and controlled as mentioned above. As the results of this, the bar minus current can perform a deep melting weldings of thick plate of Al as the high-frequency pulse current, and, on the other hand, a cleaning action can be performed by the inversion as mentioned above, and a high quality welding can be performed efficiently.

8. 发明专利

JPS5594165A TRANSISTOR DAMAGE DETETCOR 失效
公开(公告)号：JPS5594165A
公开(公告)日：1980-07-17
申请号：JP69679
申请日：1979-01-10
申请人： HITACHI LTD
发明人： SHIYOUJI MORITAKA , SHIDA TOMOHIKO , USUKI JIYUICHIROU , MARUMOTO KATSUJI
IPC分类号： G01R31/02
摘要： PURPOSE:To simplify the construction of a switching transistor damage detector by judging the damage of the switching transistors connected in parallel for balancing currents on the basis of induced voltage change generated at any emitter resistor of the switching transistors. CONSTITUTION:A plurality of switching transistors 18,... are connected in parallel with a transistor switch 17 for balancing currents. The AC current amount to be supplied to a welder or the like is determined according to their selection. Any of LED 36-39 corresponding to the selected AC current amount irradiates a light by the induced voltage by the current flowing through the emitter resistor 19 of desired transistor 18 through a detecting circuit having arithmetic amplifiers 20-23 connected in parallel with the resistor 19. When the transistors 18 are damaged in this state, the increased induced voltage is detected via the resistor 19, and the LED 36-39 irradiate lights in response to the damaged transistors 18. Thus, the damage of the transistor can be detected with a simple construction that is connected not to the emitter resistors at every detecting circuit but in parallel to any emitter resistor.

9. 发明专利

JPS5317546A ELECTRIC POWER SOURCE FOR PULSED MIG ARC WELDING MACHINE 失效
公开(公告)号：JPS5317546A
公开(公告)日：1978-02-17
申请号：JP9138776
申请日：1976-08-02
申请人： HITACHI LTD
发明人： SHIYOUJI MORITAKA , ICHIUMI TOSHIKAGE
IPC分类号： B23K9/073 , B23K9/06

10. 发明专利

JPS5248538A ARC DRIVING MAGNET DEVICE 失效
公开(公告)号：JPS5248538A
公开(公告)日：1977-04-18
申请号：JP12433575
申请日：1975-10-17
申请人： HITACHI LTD
发明人： SHIYOUJI MORITAKA
IPC分类号： B23K9/08

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