KR20130034475A - A method for arc ignition in welding - Google Patents

A method for arc ignition in welding Download PDF

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KR20130034475A
KR20130034475A KR1020110098502A KR20110098502A KR20130034475A KR 20130034475 A KR20130034475 A KR 20130034475A KR 1020110098502 A KR1020110098502 A KR 1020110098502A KR 20110098502 A KR20110098502 A KR 20110098502A KR 20130034475 A KR20130034475 A KR 20130034475A
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South Korea
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wire
welding
voltage
arc
welding member
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KR1020110098502A
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Korean (ko)
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유상훈
최상구
김경주
김종철
김재권
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현대중공업 주식회사
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Priority to KR1020110098502A priority Critical patent/KR20130034475A/en
Publication of KR20130034475A publication Critical patent/KR20130034475A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/06—Arrangements or circuits for starting the arc, e.g. by generating ignition voltage, or for stabilising the arc
    • B23K9/067—Starting the arc
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/095—Monitoring or automatic control of welding parameters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/10—Other electric circuits therefor; Protective circuits; Remote controls
    • B23K9/1006—Power supply
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/12—Automatic feeding or moving of electrodes or work for spot or seam welding or cutting
    • B23K9/124—Circuits or methods for feeding welding wire

Abstract

PURPOSE: An arc-ignition method in welding is provided to reduce spatters and to generate the beads of a welding part by generating arc in a state where a wire and a welding member are separated. CONSTITUTION: An arc-ignition method in welding comprises: a step for applying a low voltage(S1); a step for feeding a wire from a feeder(S2); a step for measuring the voltage between a tip and a welding member to identify whether the wire and the welding member are contacted(S3); a step for reducing the feeding of the wire by stopping the feeder when the voltage is 0(S4); a step for applying an open-circuit voltage in a welding machine(S5); and a step for lifting up the wire from the welding member with a solenoid valve so that arc can be generated for ignition(S6). [Reference numerals] (AA) Inputting to start welding; (BB) Voltage ≒ OV; (CC) No; (DD) Yes; (EE) Operating a solenoid valve; (FF) Arc generated; (GG) Finishing soft arc ignition; (S1) Applying a low voltage; (S2) Feeding a wire; (S3) Measuring the voltage between a tip and a welding member; (S4) Stopping the wire feeding; (S5) Applying an open-circuit voltage;

Description

용접의 아크 점화방법{A Method for Arc Ignition in Welding}A Method for Arc Ignition in Welding

본 발명은 용접의 아크 개시방법에 관한 것으로서, 더욱 상세하게는 용접부재와 와이어가 비접촉 방식으로 아크가 부드럽게 발생되도록 함으로써 용접에 따른 스패터가 감소될 수 있도록 한 용접의 아크 점화방법에 관한 것이다.
The present invention relates to an arc initiation method of welding, and more particularly, to an arc ignition method of welding in which the spatter caused by welding can be reduced by allowing the arc to be smoothly generated in a non-contact manner with the welding member and the wire.

일반적으로, 소모성 전극을 사용하는 각종 용접법(MIG, MAG, 탄산가스 용접 등)에서의 아크 점화방식은 와이어가 모재와 접촉되면 전류가 급격히 흐르고, 이 전류에 의한 열작용에 의해서 와이어가 용융되고, 용융되는 와이어가 절단되면서 아크가 발생하는 방식이다. In general, the arc ignition method in various welding methods using consumable electrodes (MIG, MAG, carbon dioxide gas welding, etc.) causes an electric current to flow rapidly when the wire comes into contact with the base material, and the wire melts due to the thermal action caused by the current. Arc is generated while the wire is cut.

이것은 소폭발에 의한 아크 점화방식이기 때문에, 용접에서는 스패터가 많이 발생하게 된다. 따라서, 저전류 영역(100A ~ 150A)에서는 그 현상이 두드러져 미려한 용접비드를 얻기가 어렵다.Since this is an arc ignition system with a small explosion, many spatters are generated in welding. Therefore, the phenomenon is prominent in the low current regions 100A to 150A, and it is difficult to obtain beautiful weld beads.

또한, 점화시 용접 토치 팁에 와이어가 눌러 붙을 수도 있다. In addition, a wire may press against the welding torch tip during ignition.

또한, 선행기술문헌에 개시된 바와 같이, 고주파 비접촉 아아크 점호기구를 구비한 장치가 개시되어 있는데, 이것은 도체인 피처리물에 방전간극을 통해서 대향시킨 전극과, 상기 전극과 상기 피처리물과의 사이에 아크 방전전류를 급전하는 주전원과, 상기 주전원과 상기 전극을 접속하기 위한 도체와, 상기 전극과 상기 피처리물과의 사이에 고주파 고전압을 급전해서 방전간극에 아크의 점호를 위한 고주파 방전을 행하게 하는 고주파전원과, 주전원과 전극 사이에 도체의 소정위치를 둘러싸도록 장착되며, 복수의 유공원반상의 페라이트 원반을 적층하여 도체가 중심공을 관통하도록 이루어지는 고주파 자성체와, 주전원과 병렬로 접속되며, 고주파 자성체와 주전원과의 사이에 도체가 고주파적으로 접지하려고 하는 쪽에 접속된 고주파 바이패스 콘덴서를 구비한 것으로서, 장치에 고주파 고전압이 인가되는 것을 저지할 수 있으므로, 장치에 특별한 고주파 절연처리를 하지 않아도 되는 것이다.
Further, as disclosed in the prior art document, there is disclosed an apparatus having a high frequency non-contact arc firing mechanism, which is formed between an electrode facing a conductor to be processed through a discharge gap and between the electrode and the workpiece. A high-frequency high voltage is supplied between the main power supply for supplying an arc discharge current to the main power supply, a conductor for connecting the main power supply and the electrode, and the electrode and the object to be treated to perform a high-frequency discharge for arc firing in the discharge gap. It is mounted so as to surround a predetermined position of the conductor between the high frequency power source and the main power source and the electrode, and a plurality of ferrite disks stacked on a plurality of non-circular plaques are connected in parallel with the main power source to form a high frequency magnetic material through which the conductor penetrates the center hole. High frequency bypass connected between the magnetic body and the main power supply to the side where the conductor is to be grounded at high frequency As provided with a condenser, it may be prevented that a high-frequency high voltage applied to the device, it is not required a special insulated high frequency to the device.

대한민국 특허공보 공개번호 특 1983-4934(공개일 : 1983.7.20)Republic of Korea Patent Publication No. 1983-4934 (published: 1983.7.20)

이에 본 발명은 상기와 같은 종래의 문제점을 해결하기 위해 이루어진 것으로서, 본 발명의 목적은 와이어를 비접촉식으로 하여 아크 생성시 발생하는 스패터를 저감시킬 수 있도록 한 용접의 아크 점화방법을 제공하는 것이다.
Accordingly, the present invention has been made to solve the conventional problems as described above, an object of the present invention is to provide an arc ignition method of welding to reduce the spatter generated during arc generation by making the wire non-contact.

상기와 같은 목적을 달성하기 위한 본 발명의 해결 수단은, 저전압을 인가하는 단계(S1)와;상기 단계(S1) 다음에 와이어를 피더로부터 송급하는 단계(S2)와; 상기 단계(S2) 다음에 와이어를 송급하면서 와이어와 용접부재의 접촉 여부를 파악하기 위해 팁과 용접부재간의 전압을 측정하는 단계(S3)와; 상기 단계(S3) 다음에 전압이 0 볼트가 되는지 여부를 확인하여 0 볼트가 되면,피더를 정지시켜서 와이어 송급을 정지하는 단계(S4)와; 상기 단계(S4) 다음에 용접기에서 개로전압을 인가하는 단계(S5)와; 상기 단계(S5) 다음에 솔레노이드밸브에 의해 와이어를 용접부재로부터 들어올려 이격시켜서 아크가 발생되어 점화되는 단계(S6)를 포함하는 아크 점화방법이다.
Solution to Problem The present invention for achieving the above object comprises the steps of applying a low voltage (S1); and following the step (S1) and feeding the wire from the feeder (S2); Measuring the voltage between the tip and the welding member to determine whether the wire and the welding member are in contact with each other while feeding the wire (S3); Checking whether the voltage becomes 0 volt after the step (S3), and when the voltage reaches 0 volts, stopping the feeder to stop the wire feeding (S4); Applying an open circuit voltage in the welding machine after the step S4; After the step (S5) is the arc ignition method comprising a step (S6) is generated by ignition by lifting the wire away from the welding member by a solenoid valve (S6).

이와 같이, 본 발명은 종래와 달리 비접촉식으로 와이어와 용접부재간에 이격된 상태에서 아크가 발생되도록 함으로써, 스패터의 생성을 대폭 줄일 수 있고, 그에따라 용접부의 양호한 비드 생성을 얻을 수 있는 효과가 있다.
As described above, according to the present invention, the arc is generated in a state in which the arc is spaced apart from the wire and the welding member in a non-contact manner, thereby greatly reducing the generation of spatters, thereby obtaining a good bead generation of the weld. .

도 1a는 본 발명의 용접의 아크 점화방법을 구현하기 위한 용접시스템의 개략도이다.
도 1b는 도 1a의 상태에서 와이어 역인칭을 통해 와이어가 용접부재로부터 떨어진 상태에서 아크가 생성되는 모습을 도시한 개략도이다.
도 2는 본 발명의 아크 점화방법을 단계별로 설명하기 위한 순서도이다. 1A is a schematic diagram of a welding system for implementing the arc ignition method of welding of the present invention.
FIG. 1B is a schematic view showing an arc generated in a state in which the wire is separated from the welding member through the wire reverse inching in the state of FIG. 1A.
2 is a flow chart for explaining the arc ignition method of the present invention step by step.

이하, 본 발명을 실시하기 위한 구체적인 내용을 첨부된 예시도면에 의거 상세하게 설명한다.DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

도 1a는 본 발명의 일 실시 예에 따른 용접의 아크 점화방법을 구현하기 위한 용접시스템의 개략도이다. 도면에 도시된 바와 같이, 용접기 본체(1)에는 아크 점화시 전원공급을 위한 전원회로부(10)와, 와이어(W)와 용접부재(40)간의 접촉감지 및 와이어(W)의 역인칭이 실행되도록 함과 동시에, 피더(30)의 송급모터(31)를 제어하기 위한 제어부(20)로 구성된다.Figure 1a is a schematic diagram of a welding system for implementing the arc ignition method of welding according to an embodiment of the present invention. As shown in the figure, the welder main body 1 carries out a power supply circuit 10 for supplying power during arc ignition, contact detection between the wire W and the welding member 40, and reverse inching of the wire W. At the same time, the control unit 20 for controlling the feed motor 31 of the feeder (30).

여기서. 상기 역인칭은 후술하는 와이어(W)가 용접부재(40) 방향으로 나아가는 것이고, 이와 반대로 정인칭은 와이어(W)가 용접부재(40)로부터 멀어지는 것을 의미한다. here. The reverse inching means that the wire W, which will be described later, moves toward the welding member 40, and in contrast, the inching means that the wire W moves away from the welding member 40.

또한, 용접기의 토치 스위치(도시되지 않음)를 조작하여 저전압의 전원공급이 이루어지고, 와이어(W)가 피더(30)에 의해 저속으로 송급된다. In addition, a low voltage power supply is performed by operating a torch switch (not shown) of the welder, and the wire W is fed at a low speed by the feeder 30.

또한, 와이어 접촉 감지는 제어부(20)에서 감지하여 실시간으로 전압을 측정하여 모니터링한다. In addition, the wire contact detection is detected by the control unit 20 to measure and monitor the voltage in real time.

더욱 구체적으로 설명하면, 와이어(W)와 용접부재(40)의 접촉여부는 전압을 측정하여 알 수 있는데, 예를 들어 24볼트를 인가하고 전원회로부(10)상에서 접속된 토치(60)의 팁과의 사이 및 전원회로부(10)상에서의 접속된 용접부재(40) 사이의 전압을 측정하면, 와이어(W)와 용접부재(40)가 접촉하지 않을 때에는 24볼트가 감지되고, 접촉했을 경우에는 0 볼트가 감지된다, 따라서, 이 전압으로 와이어(W)와 용접부재(40)간의 접촉여부를 확인할 수 있다.
More specifically, the contact between the wire W and the welding member 40 can be known by measuring the voltage. For example, the tip of the torch 60 connected to the power circuit unit 10 by applying 24 volts When the voltage between the welding member 40 and the connected welding member 40 on the power supply circuit portion 10 is measured, 24 volts are detected when the wire W and the welding member 40 do not contact each other. 0 volt is sensed, therefore, it is possible to confirm whether the wire W and the welding member 40 are in contact with this voltage.

또한, 와이어(W)가 용접부재(40)에 접촉하면 전류가 흐르고 제어부(20)에서는 0볼트를 인지하고, 그 순간 피더(30)의 송급모터(31)는 정지한다. In addition, when the wire W contacts the welding member 40, a current flows, and the control unit 20 recognizes 0 volt, and at that moment, the feeding motor 31 of the feeder 30 stops.

그런 다음에, 도 1b에 도시된 바와 같이, 제어부(20)에 의해 역인칭 지령 신호를 전달받은 솔레노이드밸브(50)가 작동하여 와이어(W)를 일정폭 만큼 누름으로써, 용접부재(40)로부터 소정의 높이만큼 이격된다. Then, as shown in Figure 1b, the solenoid valve 50 received the reverse inching command signal by the control unit 20 is operated to press the wire (W) by a predetermined width, from the welding member 40 Spaced by a predetermined height.

이때, 용접기 본체(1)는 개로 전압을 인가하고, 아크가 발생하면, 정지하고 있던 피더(30)의 송급모터(31)는 다시 작동하여 설정된 속도로 회전하고, 그에 따라 정상적인 용접작업이 수행된다. At this time, the welder main body 1 applies an open circuit voltage, and if an arc occurs, the feeding motor 31 of the stopped feeder 30 is operated again to rotate at a set speed, thereby performing a normal welding operation. .

다시 말해서, 본 발명의 일 실시 예에 따른 아크 점화방법은 다음과 같은 단계를 거쳐서 이루어진다. In other words, the arc ignition method according to an embodiment of the present invention is performed through the following steps.

먼저, 작업자가 용접기 본체(1)에서 용접시작 버튼을 누르면, 용접기 본체(1)로부터 저전압(일반적으로 직류 24V)을 토치(60) 및 용접부재(40)에 인가하는 단계(S1)와, 상기 단계(S1) 다음에 와이어(W)를 피더(30)로부터 송급하는 단계(S2)와, 상기 단계(S2) 다음에 와이어(W)를 송급하면서 와이어(W)와 용접부재(40)의 접촉 여부를 파악하기 위해 토치(60)의 팁과 용접부재(40) 사이의 전압을 측정하는 단계(S3)와, 상기 단계(S3) 다음에 전압이 0 볼트가 되는지 여부를 확인하여 0 볼트가 되면(이때 용접 와이어와 용접부재가 접촉한 상태임), 피더(30)를 정지시켜서 와이어(W) 송급을 정지하는 단계(S4)와, 상기 단계(S4) 다음에 용접기 본체에서 개로전압을 인가하는 단계(S5)와, 상기 단계(S5) 다음에 솔레노이드 밸브(50)에 의해 와이어(W)를 용접부재(40)로부터 들어올려 이격시켜서 아크가 발생되어 점화되는 단계(S6)를 포함한다.First, when an operator presses a welding start button on the welder body 1, applying a low voltage (generally, 24 V) from the welder body 1 to the torch 60 and the welding member 40 (S1), and Step (S2) of feeding the wire (W) from the feeder 30 after step (S1), and the contact of the wire (W) and the welding member 40 while feeding the wire (W) after the step (S2) Measuring the voltage between the tip of the torch 60 and the welding member 40 to determine whether or not (S3), and after the step (S3) to determine whether the voltage is 0 volts, if 0 volts (At this time, the welding wire is in contact with the welding member), the step (S4) of stopping the feeder (30) by stopping the feeder 30, and after the step (S4) to apply the open-circuit voltage in the welder body Step (S5) and after the step (S5), the solenoid valve 50 by lifting the wire (W) from the welding member 40 at the time of separation Standing arc is generated and a step (S6) to be ignited.

상기 단계(S5)에 있어서, 용접기 본체(1)에서 개로전압을 인가하면, 와이어(W)에 전류가 흐르기 시작한다. 이 전류가 흐르는 상태에서 솔레노이드 밸브(50)를 작동시켜 와이어(W)를 들어올려 이격시키면, 용접부재(40)와 와이어(W)사이에 큰 전압이 발생하며, 이 전압에 의해서 용접부재(40)와 와이어(W) 사이의 공간에 절연파괴가 발생하고, 그에 따라 아크가 발생하게 된다.In the step S5, when the open circuit voltage is applied in the welder main body 1, a current starts to flow in the wire W. FIG. When the solenoid valve 50 is operated while the current flows, the wire W is lifted and spaced apart, and a large voltage is generated between the welding member 40 and the wire W, and the welding member 40 is caused by this voltage. ) And insulation breakdown occurs in the space between the wire and the wire (W), thereby causing an arc.

이것은 종래와 같이 전류의 열작용에 의해서 절연파괴가 생기는 것이 아니고, 와이어의 이격에 의해서 절연파괴가 생기므로 아크가 부드럽게 발생하게 되는 것이다. This does not cause insulation breakdown due to the thermal action of the current as in the prior art, but because the insulation breakdown occurs due to the separation of the wires, the arc is smoothly generated.

따라서, 부드러운 아크가 발생하는 경우, 종래에 비해 스패터가 거의 생성되지 않게되어서 용접수행시 양호한 비드 생성이 가능해지는 것이다.
Therefore, when a soft arc is generated, spatter is hardly generated as compared with the conventional art, so that good bead generation during welding is possible.

이와 같이, 본 발명은 기술적 사상을 예시적으로 설명한 것에 불과한 것으로서, 본 발명이 속하는 기술 분야에서 통상의 지식을 가진 자라면, 본 발명의 본질적인 특성에서 벗어나지 않는 범위 내에서 다양한 수정, 변경 및 치환이 가능할 것이다. 따라서, 본 발명에 개시된 실시 예 및 첨부된 도면은 본 발명의 기술적 사상을 한정하기 위한 것이 아니라 설명하기 위한 것이고, 이러한 실시 예 및 첨부된 도면에 의거 본 발명의 기술 사상의 범위가 한정되는 것은 아니다. 본 발명의 보호범위는 아래의 청구범위에 의하여 해석되어야 하며, 그와 동등한 범위 내에 있는 모든 기술 사상은 본 발명의 권리범위에 포함되는 것으로 해석되어야 할 것이다.
It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the appended claims and their equivalents. It will be possible. Therefore, the embodiments disclosed in the present invention and the accompanying drawings are intended to illustrate and not limit the technical spirit of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments and the accompanying drawings . The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

W : 와이어
1 : 용접기 본체
10 : 전원 회로부
20 : 제어 회로부
30 : 피더
31 : 송급모터
40 : 용접부재
50 : 솔레노이드 밸브
60 : 토치W: Wire
1: welder body
10: power circuit
20: control circuit
30: feeder
31: feeding motor
40: welding member
50: solenoid valve
60: torch

Claims (1)

저전압을 인가하는 단계(S1)와;
상기 단계(S1) 다음에 와이어를 피더로부터 송급하는 단계(S2)와;
상기 단계(S2) 다음에 와이어를 송급하면서 와이어와 용접부재의 접촉 여부를 파악하기 위해 팁과 용접부재간의 전압을 측정하는 단계(S3)와;
상기 단계(S3) 다음에 전압이 0 볼트가 되는지 여부를 확인하여 0 볼트가 되면, 피더를 정지시켜서 와이어 송급을 정지하는 단계(S4)와;
상기 단계(S4) 다음에 용접기에서 개로전압을 인가하는 단계(S5)와;
상기 단계(S5) 다음에 솔레노이드밸브에 의해 와이어를 용접부재로부터 들어올려 이격시켜서 아크가 발생되어 점화되는 단계(S6)를 포함하는 것을 특징으로 하는 용접의 아크 점화방법. Applying a low voltage (S1);
Feeding the wire from the feeder (S2) after the step (S1);
Measuring the voltage between the tip and the welding member to determine whether the wire and the welding member are in contact with each other while feeding the wire (S3);
Checking whether the voltage becomes 0 volts after the step (S3), and when the voltage reaches 0 volts, stopping the feeder to stop wire feeding (S4);
Applying an open circuit voltage in the welding machine after the step S4;
And (S6) after the step (S5) by lifting and separating the wire from the welding member by a solenoid valve (S6) is generated and ignited arc (S6).
KR1020110098502A 2011-09-28 2011-09-28 A method for arc ignition in welding KR20130034475A (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0811294B2 (en) * 1986-10-14 1996-02-07 バブコツク日立株式会社 Non-consumable electrode welding equipment
JP2002248572A (en) * 2001-02-23 2002-09-03 Daihen Corp Arc start control method
JP2007260758A (en) * 2006-03-30 2007-10-11 Daihen Corp Arc start control method for consumable electrode arc welding
JP2009106985A (en) * 2007-10-31 2009-05-21 Daihen Corp Welding starting method for two wire welding
KR20090112922A (en) * 2008-04-25 2009-10-29 한국생산기술연구원 Mechanical waveform control method and apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0811294B2 (en) * 1986-10-14 1996-02-07 バブコツク日立株式会社 Non-consumable electrode welding equipment
JP2002248572A (en) * 2001-02-23 2002-09-03 Daihen Corp Arc start control method
JP2007260758A (en) * 2006-03-30 2007-10-11 Daihen Corp Arc start control method for consumable electrode arc welding
JP2009106985A (en) * 2007-10-31 2009-05-21 Daihen Corp Welding starting method for two wire welding
KR20090112922A (en) * 2008-04-25 2009-10-29 한국생산기술연구원 Mechanical waveform control method and apparatus

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