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11. 发明专利

JPS5489956A INTERRUPTING METHOD FOR UPSET POWER SUPPLY IN FLASH WELDING 失效
公开(公告)号：JPS5489956A
公开(公告)日：1979-07-17
申请号：JP15971177
申请日：1977-12-27
申请人： NIPPON STEEL CORP , NIPPON KINZOKU CO LTD
发明人： YAMAZAKI TSUNETOMO , SAKABA YASUROU , YAMANAKA MIKIO , SAITOU TOORU , ISHINO YOSHIKAZU
IPC分类号： B23K11/24 , B23K11/04 , G05F1/02 , H01F7/18 , H01F27/34 , H02M5/10
摘要： PURPOSE:To make preventable the generation of rush current without causing the deterioration of the weld quality, by making shorter the power supply time on the primary side of the transformer at the last half cycle of the upset power supply, than the power supply time at the just before half cycle. CONSTITUTION:The primary voltage supplied to the welding transformer just being nearby the finishing point of welding is supplied as follows; at the point P of the voltage waveform diagram, the thyristor for power supply to the last half cycle is not ignited; and at the point Q behind the point of the maximum voltage, the thyristor is ignited; and then, the power supply is stopped at the point R. Hereby, when the magnetization of the iron core of the transformer is in such condition as I or G, the power supply to the primary side of the transformer is stopped, and the welding is finished. As a result, the residual magnetization of the iron core becomes such small value as shown by the point H which is zero or nearly zero, so that the rush current at starting point of the next welding can be substantially prevented.

12. 发明专利

JPS53140248A METHOD AND APPARATUS FOR FLASH WELDING 失效
公开(公告)号：JPS53140248A
公开(公告)日：1978-12-07
申请号：JP5579577
申请日：1977-05-13
申请人： NIPPON STEEL CORP , NIPPON KINZOKU CO LTD
发明人： KADO SATOSHI , SAKABA YASUROU , YAMAZAKI TSUNETOMO , YAMANAKA MIKIO , SAITOU TOORU , KANEKO FUJIO , ISHINO YOSHIKAZU
IPC分类号： B23K11/24 , B23K11/04
摘要： PURPOSE:To improve the strength and shape of weld zone and to stabilize the quality of welding, by detecting stepping in the upset stage by electromagnetic signal and stopping the electric current supply to the material to be welded after a fixed time, at the time of carrying out flash welding of sheet etc.

13. 发明专利

JPS58215283A Resistance spot welding method of surface-treated sheet 失效
标题翻译：表面处理片的电阻点焊工艺
公开(公告)号：JPS58215283A
公开(公告)日：1983-12-14
申请号：JP9846382
申请日：1982-06-10
申请人： Nippon Steel Corp
发明人： YAMADA ARINOBU , TAKAHASHI YASUO , SAITOU TOORU
IPC分类号： B23K11/16
CPC分类号： B23K11/16
摘要： PURPOSE:To obtain a stable weld zone with no cavity, by electrically conducting twice, and impressing such a welding current that expulsion and surface flash occur within a specific short welding time and then feeding a controlled current additionally. CONSTITUTION:Plural surface-treated sheet with thickness (t) (mm.) are clamped between rod electrodes under optional pressure. Then, the current which causes expulsion and surface flash is impressed for a welding time, of 5.t-10.t cycle. Further, the additional controlled current which is 50-90% of said welding current and causes no exclusion and surface flash is conducted. Thus, the stable weld zone with no cavity is obtained within nearly the same time as before.
摘要翻译：目的：为了获得无空洞的稳定焊接区域，通过两次导电，并且在特定的短焊接时间内施加这样的焊接电流，使得排出和表面闪光发生，然后另外施加受控电流。构成：厚度（t）（mm。）的多种表面处理片材在任意压力下夹在杆电极之间。然后，当焊接时间为5.t-10.t周期时，会引起排出和表面闪光的电流。此外，进行所述焊接电流的50-90％的附加受控电流并且不引起排除和表面闪光。因此，在与之前几乎相同的时间内获得没有空腔的稳定焊接区域。

14. 发明专利

JPS55139175A TWOOELECTRODE MIG WELDING METHOD 失效
公开(公告)号：JPS55139175A
公开(公告)日：1980-10-30
申请号：JP4580879
申请日：1979-04-14
申请人： NIPPON STEEL CORP
发明人： SAITOU TOORU , NAKAMURA TAIZOU , ICHIYAMA YASUTOMO
IPC分类号： B23K9/16 , B23K9/00 , B23K9/173
摘要： PURPOSE:To prevent occurrence of defective fusion and realize high efficiency welding, by disposing the succeeding electrode at a specified distance from the preceding electrode, and setting the current and voltage of the succeeding electrode higher than those of the preceding electrode by specified values. CONSTITUTION:The distance 3 between a preceding electrode 1 and a succeeding electrode 2 is determined so that the succeeding electrode may be positioned at a distance where part of molten metal by the preceding electrode 1 starts to solidify. The electrode 1 continues to preheat while digging a base metal 4, and the produced molten metal 5 is blown in the direction of arrow 6, and part of the molten metal rapidly solidifies in part 7. The succeeding electrode 2 generates force in the direction of arrow 8 and prevents the molten metal 5 from being blow in the direction of arrow 6, and remelts the rapidly solidified part 7 including defective fusion part, thereby forming a sound bead. For this purpose it is essential to keep the arc length sufficiently long by setting the current range of the electrode 2 about 1-1.8 times of the current of the electrode 1 and the voltage of the electrode 2 higher than the voltage of the electrode 1.

15. 发明专利

JPS5542118A FLASH WELDING METHOD 失效
公开(公告)号：JPS5542118A
公开(公告)日：1980-03-25
申请号：JP11413378
申请日：1978-09-19
申请人： NIPPON STEEL CORP
发明人： SAITOU TOORU , ISHINO YOSHIKAZU
IPC分类号： B23K11/04
摘要： PURPOSE:To considerably improve the toughness of the welded joing part as compared to conventional methods by providing auxiliary materials to the surface of the welding transformer side of the side face adjoining to the butt end part of the materials to be welded and flashing these materials simultaneously. CONSTITUTION:When auxiliary materials 6 are adjoined to the surface of the welding transformer side 3 of both materials 1 to be welded and these materials are flashed simultaneously, the molten metal of the contact part is flown and moved to the opposite side of the transformer 3 owing to the mutual action of the current and its magnetic field. When deoxidizing elements such as Ti, Nb, etc. are used for the auxiliary materials 6, the formation of oxides such as of Si, Mn, etc. at the bonding surface is suppressed and toughness is considerably improved. The sizes of the auxiliary materials 6 are made length l same as the width of the materials 1 and width a equal to one side flashing margin and the thickness b is selected according to the thickness of the material 1 in case of the materials 1 to be welded are falt. The toughness of the welded joint obtained by upsetting may be improved considerably as compared to that by conventional methods.

16. 发明专利

JPS52127445A GAS SHIELDING METHOD IN NARROW GROOVE WELDING 失效
公开(公告)号：JPS52127445A
公开(公告)日：1977-10-26
申请号：JP4527476
申请日：1976-04-20
申请人： NIPPON STEEL CORP
发明人： YABUKI YUTAKA , SAITOU TOORU , IWAMI HIROSHI
IPC分类号： B23K9/16 , B23K9/173

17. 发明专利

JPS58215284A Inspecting method of quality of spot weld zone 失效
标题翻译： SPOT焊接质量检验方法
公开(公告)号：JPS58215284A
公开(公告)日：1983-12-14
申请号：JP9846282
申请日：1982-06-10
申请人： Nippon Steel Corp
发明人： YAMADA ARINOBU , TAKAHASHI YASUO , SAITOU TOORU
IPC分类号： B23K11/25
CPC分类号： B23K11/25
摘要： PURPOSE:To decide on the quality of weld zone, by comparing a value indicating an electrode position one cycle before the ending of current feeding with a value indicating an electrode position when the electrode feeding is completed. CONSTITUTION:Lapped sheet 1, 2, and 3 are inserted between a fixed electrode 7 and a driving electrode 8 and a current which causes expulsion and surface flash is fed for a specific time to perform spot welding. The electrode position during this welding is detected by a displacement sensor 15 fitted to the electrode 8 and the value indicating the electrode position one cycle before the feeding is completed is stored in the 1st holding circuit 26. On the other hand, the value indicating the electrode position when the feeding is completed is stored in the 2nd storing circuit 27, and those values are compared with each other by an arithmetic circuit 28. Thus, a decision on whether the weld zone is normal or not is made on the basis by the obtained difference value.
摘要翻译：目的：通过将表示电流输送结束前的一个周期的电极位置的值与表示电极馈送完成时的电极位置的值进行比较来决定焊接区域的质量。构成：将研磨片1,2和3插入固定电极7和驱动电极8之间，并且将导致排出和表面闪光的电流进给一定时间进行点焊。焊接期间的电极位置由安装在电极8上的位移传感器15检测出，并且在进给完成前一个周期的电极位置的值被存储在第1保持电路26中。另一方面，馈电完成时的电极位置被存储在第二存储电路27中，并且这些值通过运算电路28相互比较。因此，关于焊接区域是否正常的判定是基于得到差值。

18. 发明专利

JPS57209785A LAP RESISTANCE WELDING METHOD FOR SURFACE COATED STEEL PLATES 失效
公开(公告)号：JPS57209785A
公开(公告)日：1982-12-23
申请号：JP9379281
申请日：1981-06-19
申请人： NIPPON STEEL CORP
发明人： YAMADA ARINOBU , SAITOU TOORU , TAKAHASHI YASUO , SANAO YASUNORI
IPC分类号： B23K11/16
摘要： PURPOSE:To improve the corrosion resistance of the lap resistance weld zones of surface-coated steel plates by welding while enclosing the outside surfaces of the steel plates to be heated in nonoxidative atmospheres etc. then covering the outside surfaces of the weld zones with metals having a m. p. lower than that of iron. CONSTITUTION:Upper, lower chambers 3, 3' are provided at the heating parts on the outside surfaces of materials 1, 1' to be welded, and shielding gas nozzles 4, 4' are provided to the chambers 3, 3'. Nonoxidative or reducing gases 5, 5' are supplied to these. The materials 1, 1' are welded by a pair of disc-like electrodes 2, 2' which can be internally cooled with water. Wire-, powder- or paste- like low m. p. metals 7, 7' are added and supplied to the heated outside surfaces of the weld zones through feed pipes 6, 6'.

19. 发明专利

JPS56165570A METHOD AND DEVICE FOR FLUSH BUTT WELDING 失效
公开(公告)号：JPS56165570A
公开(公告)日：1981-12-19
申请号：JP6994980
申请日：1980-05-26
申请人： NIPPON STEEL CORP
发明人： KODAIRA KAZUMARU , SAITOU TOORU , ICHIYAMA YASUTOMO
IPC分类号： B23K11/24
摘要： PURPOSE:To start upsetting when a cumulative value exceeds a set value and stabilize joint qualiy to high quality by cumulating welding current or applied electric power at the weighting smaller as the time is older and comparing the same with the set value. CONSTITUTION:In a flush condition detecting circuit 20, flush current is integrated by the capacitor C connected to an operational amplifier OP at the weighting correspondig to time. Next, the integrated voltage Vout is compared with set voltage Qpr in a comparator 20b, and when the integrated voltage Vout exceeds the set voltage Qpr, the comparator 20b inverts its output from ''0'' to ''1'', and applied the output ''1'' as an upset command to an upset controller 17. Then, the controller 17 operates an upset driving device at the prescribed phase.

20. 发明专利

JPS56165569A METHOD AND DEVICE FOR EVALUATION OF FLUSH BUTT WELDING 失效
公开(公告)号：JPS56165569A
公开(公告)日：1981-12-19
申请号：JP6994880
申请日：1980-05-26
申请人： NIPPON STEEL CORP
发明人： KODAIRA KAZUMARU , SAITOU TOORU , ICHIYAMA YASUTOMO
IPC分类号： B23K11/24
摘要： PURPOSE:To stabilize joint quality to high quality with a cumulative value as an evaluation index for welding quality by cumulating the current supplied to welding surfaces or the electric power applied thereto at the weight smaller as the period of flush process is earlier. CONSTITUTION:In the flush process, welding surfaces are heated by the flush current i(ti) flowed during the time DELTAt, but cooling accompanies with heating and therefore the contribution to joining is less as i(ti).DELTAt is earlier than the upset time. Now if it is assumed that the evaluation value Q is the equation I and that f(t) is the monotone decreasing function which is the prescribed value at the upset time T0 and is smaller as the timer is earlier than the time T0, the integral equation II from the flush start (time 0) until the upset start (T0) indicates the heating conditions of the joining surfaces at the upsetting time and the state including all of the influences of the flush at each point of time. Hence, if the occurrence of the flush just before upsetting is frequent, the value of Q is large and when the flush interrupts just prior to the upsetting, Q is small. Therefore, the value of Q is taken as an index for evaluation of quality.

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