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31. 发明授权

US4952773A Automatic arc-welding machine operating with rod electrodes and a preferred application thereof 失效
标题翻译：自动电弧焊机用棒电极操作，其优选应用
公开(公告)号：US4952773A
公开(公告)日：1990-08-28
申请号：US395787
申请日：1989-08-18
申请人： Kalman Orsos , Gerhard Dietrich , Alfons Berndl , Franz-Josef Kufner
发明人： Kalman Orsos , Gerhard Dietrich , Alfons Berndl , Franz-Josef Kufner
IPC分类号： B23K9/028 , B23K9/067 , B23K9/12 , B23K9/127
CPC分类号： B23K9/067 , B23K9/121
摘要： An automatic arc welding machine of the type which operates with rod electrodes. The electrodes (46), which are held in a welding head (28), are moved automatically with respect to the workpiece. The electrodes are moved longitudinally away from the workpiece in accordance with the arc voltage such that a certain arc length is sustained. After use they are automatically replaced with new electrodes. For this purpose there is provided an arc striking control by means of which the particular electrode (46) is placed on the workpiece with the current limited to a value below the selected welding current; the electrode is then raised from the workpiece by an amount corresponding to the predetermined arc length while the welding current is released, before the longitudinal movement of the electrode in accordance with the arc voltage begins. A precisely timed and accurately placed ignition is achieved in this manner, even if the location of the weld is covered with scale or slag.
摘要翻译：一种用杆电极操作的自动电弧焊机。保持在焊接头（28）中的电极（46）相对于工件自动移动。电极根据电弧电压纵向远离工件移动，使得能够维持一定的电弧长度。使用后，将自动更换新的电极。为此目的，提供了一种电弧触发控制，通过该电弧触发控制，特定电极（46）放置在工件上，电流限制在低于所选焊接电流的值; 然后在根据电弧电压开始电极的纵向移动之前，将电极从工件上升到对应于预定电弧长度的量，同时释放焊接电流。以这种方式实现精确定时和准确放置的点火，即使焊缝的位置被鳞屑或炉渣覆盖。

32. 发明授权

US4585921A Torch operation interlock device 失效
标题翻译：手电筒联动装置
公开(公告)号：US4585921A
公开(公告)日：1986-04-29
申请号：US515950
申请日：1983-07-20
申请人： Raymond G. Wilkins , Bruce O. Hatch
发明人： Raymond G. Wilkins , Bruce O. Hatch
IPC分类号： B23K9/067 , F16P1/06 , H05H1/36 , B23K9/00
CPC分类号： F16P1/06 , B23K9/067 , H05H1/36
摘要： The present invention minimizes shock hazard in using a touch start plasma torch. The resistance between the torch tip and the workpiece is compared to a predetermined value set by estimating the resistance between a person's hand to ground under the most unfavorable conditions. In the preferred embodiment, such comparison is performed by supplying an AC voltage to a resistor in series with a torch tip, the resistor having a resistance equal to the predetermined value. The peak voltage at a point in the circuit connection between the resistor and torch tip is sensed and if such peak is less than half of the peak voltage of the AC voltage supplied to the resistor and torch tip, the resistance between the torch tip and ground is less than the predetermined value and a control signal will be generated. A relay will switch on the power supply supplying high voltage between the cathode and the workpiece only when it receives the control signal indicating that the resistance between the torch tip and ground is below the predetermined value.
摘要翻译：本发明使触摸启动等离子体焰炬中的电击危害最小化。通过在最不利的条件下估计人的手与地面之间的电阻，将焊炬尖和工件之间的电阻与预定值进行比较。在优选实施例中，通过向与电极尖端串联的电阻器提供AC电压来执行这种比较，该电阻器具有等于预定值的电阻。检测电阻器和割炬尖端之间的电路连接点处的峰值电压，如果这样的峰值小于提供给电阻器和割炬尖端的交流电压的峰值电压的一半，则焊炬尖端与地之间的电阻小于预定值，并且将产生控制信号。只有当接收到指示割炬尖端和地面之间的电阻低于预定值的控制信号时，继电器将接通供电电压的电源。

33. 发明授权

US4561059A Microprocessor controlled welding apparatus 失效
标题翻译：微处理器控制焊接设备
公开(公告)号：US4561059A
公开(公告)日：1985-12-24
申请号：US469519
申请日：1983-02-24
申请人： Clint A. Davis , Melvin P. Trail
发明人： Clint A. Davis , Melvin P. Trail
IPC分类号： B23K9/067 , B23K9/073 , G06F15/46 , B23K9/20
CPC分类号： B23K9/073 , B23K9/067
摘要： A microprocessor-controlled arc welding power supply is disclosed. A silicon controlled rectifier ("SCR") bank is used to generate a direct current arc welding current under program control. Positive sychronization is provided by the microprocessor using a phase locked loop and a polarity detector, so that the gating signals applied to the SCRs are correctly timed. Optimum tradeoffs between hardware and software are accomplished by using look up tables to store correction factors that can be quickly accessed during execution, and by using timers as smart interface chips to fire the SCRs at the same angle during each cycle until changed or updated by the microprocessor. The arc welding power supply is capable of operating in a constant current or constant voltage mode without rewiring the circuit.
摘要翻译：公开了一种微处理器控制的电弧焊电源。可控硅整流器（“SCR”）组用于在程序控制下产生直流电弧焊电流。微处理器使用锁相环和极性检测器提供正同步，使得施加到SCR的门控信号正确定时。通过使用查找表来存储在执行期间可以快速访问的校正因子，并且通过使用定时器作为智能接口芯片，在每个周期期间以相同的角度触发SCR，直到由微处理器。电弧焊电源能够以恒定电流或恒压模式工作，而不需要重新布线电路。

34. 发明授权

US2597689A Arc starting system 失效
标题翻译：弧启动系统
公开(公告)号：US2597689A
公开(公告)日：1952-05-20
申请号：US21243351
申请日：1951-02-23
申请人： GEN ELECTRIC
发明人： WELCH JR ALANSON U
IPC分类号： B23K9/067 , H01F29/10
CPC分类号： B23K9/067 , H01F29/10

35. 发明授权

US11958141B2 Systems and methods to provide welding-type arc starting and stabilization with reduced open circuit voltage 有权
公开(公告)号：US11958141B2
公开(公告)日：2024-04-16
申请号：US16670993
申请日：2019-10-31
申请人： Illinois Tool Works Inc.
发明人： Bernard J. Vogel , Michael D. Madsen
IPC分类号： B23K9/067 , B23K9/073
CPC分类号： B23K9/067 , B23K9/0731 , B23K9/0732 , B23K9/0734 , B23K9/0735
摘要： Systems and methods to provide welding-type arc starting and stabilization with reduced open circuit voltage are disclosed. An example welding-type power supply includes: power conversion circuitry configured to convert input power to welding-type power; and control circuitry configured to: control the power conversion circuitry to output a voltage pulse at a first voltage; determine whether the power conversion circuitry outputs current during the voltage pulse; in response to determining that there is less than a threshold output current during the voltage pulse, control the power conversion circuitry to turn off an output or output a second voltage that is less than the first voltage; and in response to determining that the power conversion circuitry outputs at least the threshold output current during the voltage pulse, control the power conversion circuitry to output the welding-type power.

36. 发明授权

US11897059B2 Current limiting secondary contact 有权
公开(公告)号：US11897059B2
公开(公告)日：2024-02-13
申请号：US16283367
申请日：2019-02-22
申请人： Illinois Tool Works Inc.
发明人： Mark Richard Christopher , John Walter Lundin
IPC分类号： B23K9/067 , B23K9/073 , B23K9/10
CPC分类号： B23K9/067 , B23K9/0731 , B23K9/1093
摘要： A welding-type system includes a welding torch comprising a contact tip to provide an electrode wire. A secondary contact in electrical contact with the electrode wire, the secondary contact located along a length of the electrode wire and before the contact tip. Each of the contact tip and the secondary contact are connected to a welding-type power source. A current limiting device coupling located between the welding-type power source and the secondary contact and configured to limit a current at the secondary contact.

37. 发明授权

US11701731B2 Method for starting a submerged arc welding process and welding apparatus 有权
公开(公告)号：US11701731B2
公开(公告)日：2023-07-18
申请号：US17142609
申请日：2021-01-06
申请人： ESAB AB
发明人： Hannes Raudsepp , Martin Andersson , Tomas Johansson , Rikard Ljungkvist
IPC分类号： B23K9/18 , B23K9/067 , B23K9/073
CPC分类号： B23K9/188 , B23K9/067 , B23K9/073 , B23K9/0732 , B23K9/186
摘要： A method comprising an arc ignition phase (IP), an arc-stabilizing phase (AP) and a stable arc phase (SP). The arc stabilizing phase comprises an initial sub-phase (IS) comprising the step of feeding at least one hot wire (4, 12) at constant feed speed and a main sub-phase (MS) comprising the steps of feeding said hot wire at constant feed speed and feeding at least one cold wire (22) at constant feed speed. The stable arc phase comprises the steps of continuously adjusting the feed speed of the hot wire and continuously adjusting the feed speed of the cold wire. The invention also relates to a welding apparatus (1) for carrying out the method. The welding apparatus comprises a hot wire feeding means (150), a contact means (2), a cold wire feeding means (35) and a control unit (31). The control unit is adapted to control said hot wire feeding means to feed the hot wire at a constant feed speed during the initial sub-phase, feed the hot wire at a constant feed speed during the main sub-phase and to continuously during the stable arc phase adjust the feed speed of the hot wire. The control unit is adapted to control said cold wire feeding means to feed the cold wire at a constant feed speed during the main sub-phase and continuously during the stable arc phase adjust the cold wire feed speed.

38. 发明授权

US09878395B2 Method for detecting current transfer in a plasma arc 有权
公开(公告)号：US09878395B2
公开(公告)日：2018-01-30
申请号：US12403217
申请日：2009-03-12
申请人： Anthony V. Salsich , Alan A. Manthe
发明人： Anthony V. Salsich , Alan A. Manthe
IPC分类号： B23K9/00 , B23K10/00 , B23K9/067
CPC分类号： B23K10/00 , B23K9/067
摘要： Methods and systems for transferring a plasma arc from between an electrode and a tip to between an electrode and a workpiece and back as dictated by the conditions at the cutting arc are provided. The present disclosure allows for arc transfer detection without use of a current sensor at the workpiece or knowledge of a precise pilot circuit limit value through a novel plasma arc control circuit. In one embodiment, the plasma arc control circuit provides a programmable current source and a current sink configured to limit current in a pilot arc control circuit. The pilot arc circuit may be configured to signal its limiting status to a controller, which may switch the pilot arc control circuit in or out of the current path. Certain embodiments may include a pulse width modulation control in the pilot arc control circuit for controlling current flow through the pilot arc circuit.

39. 发明申请

US20170282274A1 METHODS AND APPARATUS TO CONTROL HOT-START WELD CURRENT FOR ARC IGNITION 审中-公开
公开(公告)号：US20170282274A1
公开(公告)日：2017-10-05
申请号：US15419498
申请日：2017-01-30
申请人： Illinois Tool Works Inc.
发明人： Craig Steven Knoener , Zach MacMullen , Charles Ace Tyler , Lucas Charles Johnson
IPC分类号： B23K9/067 , B23K9/007 , B23K9/095
CPC分类号： B23K9/0672 , B23K9/007 , B23K9/067 , B23K9/0953 , B23K9/0956 , B23K9/173
摘要： Methods and apparatus to control hot-start weld current for arc ignition are disclosed. An example welding-type power supply includes a power converter to output welding-type current, a temperature monitor to determine a temperature of an electrode using at least one of a temperature measurement or a thermal model, and a current controller to control a hot-start weld current output by the power converter based on the temperature of the electrode.

40. 发明申请

US20170225256A1 ARC WELDING CONTROL METHOD 审中-公开
公开(公告)号：US20170225256A1
公开(公告)日：2017-08-10
申请号：US15518644
申请日：2015-10-28
申请人： DAIHEN CORPORATION
发明人： Kento TAKADA , Toshiaki NAKAMATA
IPC分类号： B23K9/12 , B23K9/09 , B23K9/073 , B23K9/067
CPC分类号： B23K9/125 , B23K9/067 , B23K9/073 , B23K9/09 , B23K9/092 , B23K9/093 , B23K9/124
摘要： There is provided an arc welding control method for performing a forward/reverse feeding control of alternating a feeding rate of a welding wire between a forward feeding period and a reverse feeding period, and generating short-circuiting periods and arc periods to perform welding. The welding wire is fed forwardly upon starting the welding. The forward feeding is continued during a transient welding period from a time point at which the welding wire comes in contact with a base material and conduction of welding current is started to a time point at which convergence on a steady welding period is performed. The transient welding period is terminated at the short-circuiting period. The forward/reverse feeding control is started from the reverse feeding period after the termination of the transient welding period.

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