KR20050029480A - The high efficient mag-welding torch can control welding voltage - Google Patents

The high efficient mag-welding torch can control welding voltage Download PDF

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KR20050029480A
KR20050029480A KR1020030065767A KR20030065767A KR20050029480A KR 20050029480 A KR20050029480 A KR 20050029480A KR 1020030065767 A KR1020030065767 A KR 1020030065767A KR 20030065767 A KR20030065767 A KR 20030065767A KR 20050029480 A KR20050029480 A KR 20050029480A
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welding
gas
mag
tip
voltage
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KR1020030065767A
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KR100558289B1 (en
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김유찬
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김유찬
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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
    • B23K9/24—Features related to electrodes
    • B23K9/28—Supporting devices for electrodes
    • B23K9/29—Supporting devices adapted for making use of shielding means
    • B23K9/291—Supporting devices adapted for making use of shielding means the shielding means being a gas
    • 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
    • B23K9/16—Arc welding or cutting making use of shielding gas
    • B23K9/173—Arc welding or cutting making use of shielding gas and of a consumable electrode

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Arc Welding In General (AREA)
  • Arc Welding Control (AREA)

Abstract

A high efficient MAG(Metal Active Gas)-welding torch possible to adjust welding voltage is provided to easily increase or adjust the welding voltage by changing a distance(CTWD, Contact Tip to Work-piece Distance) between a welding tip and a base metal through shifting the welding tip, to remove a post-processing by forming a flat bead without weld defects, and to prevent the welding tip from being melted or burned due to excessive arc heat during welding work. A high efficient MAG-welding torch possible to adjust welding voltage comprises a welding torch body(8) supplying welding voltage to deliver a wire through a liner; a gas nozzle(5) combined with the welding torch body; a gas ejector(2) having a gas ejecting hole(3) in the gas nozzle; a welding tip(1) combined with the gas ejector; and an adjusting hole(4) changing position of the welding tip. The welding tip is recessed in, at least, 5 millimeters more than the distal end portion of the gas nozzle. The gas nozzle is composed of an insulating unit(7) and a water cooling unit(6).

Description

용접전압 조절이 가능한 고능률 마그용접용 토치{The high efficient MAG-welding torch can control welding voltage}The high efficient MAG-welding torch can control welding voltage}

본 발명은 용접전압 조절이 가능한 고능률 마그용접용 토치에 관한 것으로서, 보다 상세하게는 가스분출기에서부터 돌출되어 용가재인 와이어가 모재로 송급되면서 아크가 발생되는 용접팁의 길이를 조절할 수 있는 것이다.The present invention relates to a high-efficiency mag welding torch that can adjust the welding voltage, and more particularly, it is possible to adjust the length of the welding tip which is generated from the arc as the wire protrudes from the gas ejector and the filler metal is supplied to the base material.

일반적으로 마그(MAG, Metal Active Gas) 용접이란 불활성가스와 활성가스를 혼합한 가스를 보호가스로 활용하고, 소모전극 와이어를 연속적으로 용융지에 송급하면서 전류를 통하여 와이어와 모재 사이에서 아크가 발생되도록 하는 용접방법을 말한다. 이런 마그용접에 있어서 용착률은 단위시간당 와이어가 아크열에 의해 용융되어지는 양을 지칭하며 용접의 효율을 나타내는 중대한 척도가 된다. 용착률이 100g/min 이상인 경우를 일반적으로 고능률 용접이라 하며, 최근에는 로봇을 비롯한 자동화설비와 결합되어 산업현장에서 많이 이용되고 있다.In general, MAG (Metal Active Gas) welding means that a gas mixed with an inert gas and an active gas is used as a protective gas, and an arc is generated between the wire and the base material through an electric current while continuously supplying the consumed electrode wire to the molten pool. It is a welding method. In such mag welding, the welding rate refers to the amount of wire melting per unit time by arc heat and is a significant measure of the welding efficiency. In general, when the welding rate is 100 g / min or more, it is generally referred to as high efficiency welding, and recently, it is used in industrial sites by being combined with automation equipment including robots.

용착률은 공급되는 와이어를 녹일 수 있는 용접전류에 의해 결정되므로, 고능률 용접은 높은 용접전류와 높은 와이어 송급이 동시에 이루어지는 용접기법이라 할 수 있다. 반면 용접전압은 비드의 형상에 많은 영향을 미치는데, 전압이 높을 수록 편평한 고품질의 비드를 형성한다. 그러나 마그용접에서 사용되고 있는 용접기는 도 1에 도시된 마그용접기의 출력 및 CTWD 특성도와 같이 출력 특성상 전류가 증가 또는 감소하더라도 거의 변하지 않는 전압특성을 나타냄으로서 사용자 임의의 자유로운 전압변경이 어렵다는 한계성을 지니고 있다.Since the welding rate is determined by the welding current capable of melting the supplied wire, high efficiency welding can be referred to as a welding technique in which high welding current and high wire feeding are simultaneously performed. On the other hand, the welding voltage has a great influence on the shape of the bead, and the higher the voltage, the higher quality beads are formed. However, the welding machine used in the mag welding has a limitation that it is difficult to change the voltage freely by the user because it shows the voltage characteristics that hardly change even if the current increases or decreases in the output characteristics such as the output and CTWD characteristics of the mag welder shown in FIG. 1. .

상술한 문제점을 해결하기 위해, 높은 용접전류와 와이어가 송급되는 고능률 마그용접에서 용접팁의 조절로서 후술할 용접팁과 모재간의 거리(CTWD)를 조절함으로서 용이하게 용접전압을 증대 또는 조절할 수 있는 용접토치를 제공함으로서, 용접결함이 없는 고품질의 용접부를 형성하고, 특히 편평한 비드를 형성하여 사상과 같은 후 공정을 없앨 수 있게 하는데 그 목적이 있다.In order to solve the above problems, by adjusting the welding tip and the base material (CTWD) to be described later as the adjustment of the welding tip in high efficiency current welding with high welding current and wire can be easily increased or adjusted the welding voltage By providing a welding torch, the object is to form a high quality weld free of weld defects, and in particular to form flat beads to eliminate post processing such as finishing.

또한, 용접시 발생하는 강렬한 아크열에 의해 용접팁의 용융 또는 소손을 예방할 수 있는 용접토치를 제공하는 데 또다른 목적이 있다.In addition, it is another object to provide a welding torch that can prevent the melting or burning of the welding tip by the intense arc heat generated during welding.

마그용접은 용접부의 우수한 기계적 성질과 함께 로봇을 비롯한 자동화 설비와의 접목이 용이하다는 장점으로 인해, 철구조물 용접에서 부터 압력용기 용접에 이르기까지 다양한 제품, 다양한 용접부 형상에 이용되고 있다. 고능률 마그용접은 이러한 일반의 마그용접이 사용되는 분야는 모두 대체적용이 가능하고, 일반 마그용접에 비해 높은 용접전류와 와이어 송급이 사용됨에 따라 용접 적층수를 줄일 수 있으며, 빠른 용접속도로 인해 높은 용접생산효율의 획득이 가능하다. 그러나 고 용접전류를 사용함으로 강한 아크빛과 열로 인해 작업환경이 매우 열악하게 되어 수작업보다는 대부분 로봇과 같은 설비를 이용하여 자동화되고 있다.Mag welding is used for various products and various welding shapes, from welding of steel structures to pressure vessel welding, due to its excellent mechanical properties and ease of grafting with robots and other automation equipment. High-efficiency mag welding can be applied to all the fields where the general mag welding is used, and it can reduce the number of welding laminations due to the high welding current and wire feeding compared to the general mag welding. High welding production efficiency can be obtained. However, due to the use of high welding current, the working environment is very poor due to the strong arc light and heat.

고능률 마그용접의 높은 생산효율은 300A 이상의 용접전류를 사용하고, 직경 1.2mm 와이어의 경우 약 11~18mm/min 정도의 송급으로 100g/min 이상의 용착률을 얻을 수 있음에 기인하나, 마그용접기의 전류-전압 출력 특성상 전압을 전류증가에 대해 충분히 높게 할 수 없어 비드높이가 높은 볼록한 비드를 형성한다는 문제점을 지니고 있다.The high production efficiency of high efficiency mag welding is due to the use of welding current of 300A or more, and the welding rate of 100g / min or more can be obtained by feeding about 11-18mm / min for 1.2mm diameter wire. Due to the current-voltage output characteristics, the voltage cannot be made high enough to increase the current, thereby forming a convex bead having a high bead height.

먼저 종래의 마그용접용 용접토치는 도 3에서와 같이 가스노즐과 모재간거리(A)의 증대는 용접팁과 모재간의 거리(CTWD)의 증대를 동시에 수발하므로, 상기 A를 증대시키면 자동적으로 CTWD의 증대를 통해 용접전압이 상승한다. 그러나, A를 20mm 이상 설정할 경우 마그용접시 아크보호를 위한 보호가스의 역할이 제대로 이루어지지 않아 용접결함이 발생된다. 따라서, 실제 A는 25mm 이상 사용되지 않는다.First, as the conventional MAG welding torch increases in the distance between the gas nozzle and the base material (A), as shown in FIG. 3, simultaneously increases the distance between the welding tip and the base material (CTWD), and the A increases automatically the CTWD. Increasing the welding voltage increases. However, if A is set to 20 mm or more, the welding gas is not properly formed, and thus the welding defect is generated. Therefore, the actual A is not used more than 25mm.

본 발명은 용접전압을 높게하여 비드높이는 낮추고 퍼짐성을 증가시켜 편평한 비드를 형성할 수 있는 토치에 관한 것으로서, 보다 우수한 용접품질 확보와 아크열에 의한 토치손상 예방 및 사상과 같은 후속공정을 줄일 수 있도록 한 것이다.The present invention relates to a torch that can form a flat bead by lowering the bead height by increasing the welding voltage and increasing the spreading property, so that it is possible to reduce the subsequent processes such as securing better welding quality and preventing torch damage due to arc heat and finishing. will be.

이하 첨부된 도면에 의해 본 발명을 상세히 설명하면 다음과 같다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

도 4는 본 발명의 구성예시도로서, 본 발명에 의한 용접전압 조정이 가능한 고능률 마그용접용 토치는 용접전원을 공급하여 라이너를 통해 와이어가 송급되는 용접토치 몸체(8)와, 상기 용접토치 몸체(8)와 결합되는 가스노즐(5)과, 상기 가스노즐(5) 내부에 가스분출구(3)가 형성된 가스분출기(2)와, 상기 가스분출기(2)에 결합되는 용접팁(1)과, 상기 용접팁(1)의 위치를 조절해주는 조절구(4)로 형성되어 있다.4 is a structural example of the present invention, the welding efficiency of the high-efficiency mag welding torch according to the present invention, the welding torch body 8, the wire is fed through the liner by supplying a welding power supply, and the welding torch A gas nozzle 5 coupled to the body 8, a gas ejector 2 having a gas ejection opening 3 formed inside the gas nozzle 5, and a welding tip coupled to the gas ejector 2 ( 1), and is formed of a control mechanism (4) for adjusting the position of the welding tip (1).

여기서, 상기 가스노즐(5)은 내부에 절연부(7) 및 수냉부(6)가 형성되어 있다.Here, the gas nozzle 5 has an insulating portion 7 and a water cooling portion 6 formed therein.

상기 가스노즐(5)은 가스분출기(2)에서부터 분사된 보호가스를 아크가 발생되는 용접부에 모아주는 역할을 하며, 상기 가스분출기(2)는 용접부 보호를 위한 보호가스가 분출되는 부분으로서 내부에는 암나사가 형성되어서 조절구(4) 외측에 형성된 수나사에 의해 상ㆍ하로 이동이 가능하므로, 상기 용접팁(1)이 가스노즐(5) 내에서 상ㆍ하로 위치가 이동된다.The gas nozzle 5 collects the protective gas injected from the gas ejector 2 into the welding part where the arc is generated, and the gas ejector 2 is a part in which the protective gas for protecting the welding part is ejected. Since the internal thread is formed inside, and can move up and down by the external thread formed in the outer side of the control opening 4, the said welding tip 1 moves up and down in the gas nozzle 5, and is moved up and down.

상기 수냉부(6)는 가스노즐(5)이 용접열로 인해 용융 또는 손상되는 것을 방지하기 위한 냉각부로 냉각수가 순환되는 부분이며, 상기 절연부(7)는 가스노즐(5)을 용접토치 몸체(8)로 부터 전달되는 용접전원으로 부터 절연하기 위한 부분이다.The water cooling unit 6 is a portion in which the coolant is circulated to the cooling unit for preventing the gas nozzle 5 from being melted or damaged due to the welding heat, and the insulating unit 7 connects the gas nozzle 5 to the welding torch body. This part is to insulate from welding power source transmitted from (8).

이하 본 발명의 작용을 설명하면 다음과 같다.Hereinafter will be described the operation of the present invention.

용접전압은 도 2에 도시된 마그용접기의 CTWD-전압 특성도와 같이 용접팁과 모재간의 거리(CTWD)에 의해 크게 좌우된다. 즉, CTWD를 크게 하면 용접전압이 크게 증대하고, CTWD를 작게하면 용접전압이 크게 감소된다. 따라서, 본 발명은 CTWD를 조정하여 간접적으로 용접전압을 증감시키는 원리를 활용하였다.The welding voltage is largely dependent on the distance between the welding tip and the base material CTWD, as shown in the CTWD-voltage characteristic diagram of the mag welder shown in FIG. In other words, the larger the CTWD, the larger the welding voltage, and the smaller the CTWD, the larger the welding voltage. Therefore, the present invention utilizes the principle of indirectly increasing or decreasing the welding voltage by adjusting the CTWD.

본 발명에 의한 용접전압 조절이 가능한 고능률 마그용접용 토치는 도 5와 같이 가스노즐(5)과 모재(11)간 거리는 변경하지 않고, 가스분출기(2) 내부에 용접팁(1)의 위치를 조정할 수 있는 조절구(4)를 형성함으로서, 상기 조절구(4)가 가스분출기(2)를 따라 상하로 이동되는 이동량에 의해 CTWD의 자유로운 조절이 가능하여 결과적으로 용접전압을 조절할 수 있다.High-efficiency mag welding torch which can adjust the welding voltage according to the present invention does not change the distance between the gas nozzle 5 and the base material 11, as shown in FIG. By forming the adjusting device 4 to adjust the position, the control device 4 can be freely adjusted by the movement amount of the control device 4 is moved up and down along the gas ejector 2, and as a result, the welding voltage can be adjusted. have.

상술한 본 발명의 실시예에서는 조절구(4)가 가스분출기(2) 내부의 암나사를 따라 상기 조절구(4) 외측의 수나사로서 이동이 가능하나 본 발명의 기술적 사상의 범위 내에서는 얼마든지 응용이 가능하다. In the above-described embodiment of the present invention, the regulator 4 can be moved as a male screw outside the regulator 4 along the female screw inside the gas ejector 2, but within the scope of the technical idea of the present invention. Application is possible.

상술한 바와 같이, 본 발명에 의한 용접전압 조절이 가능한 고능률 마그용접용 토치As described above, the high efficiency mag welding torch capable of adjusting the welding voltage according to the present invention

는 조절구의 위치조정 만으로 용이하게 용접전압을 조절할 수 있어, 용접품질을 높이고 편평한 모양의 용접비드를 형성할 수 있으며, 사상과 같은 후공정이 필요없게 되며, 과다한 아크열에 의한 용접팁 용융 또는 소손을 예방하며, 장시간 용접을 가능하게 함으로서 생산성을 향상시킬 수 있다.The welding voltage can be easily adjusted only by adjusting the position of the control port, so that the welding quality can be improved and the flat welding bead can be formed, and there is no need for post-process such as finishing, and the welding tip can be melted or burned by excessive arc heat. The productivity can be improved by preventing the welding for a long time.

또한, 용접부의 퍼짐성 향상으로 용접부 용융불량 현상을 감소시킬 수 있다.In addition, by improving the spreadability of the weld, it is possible to reduce the weld melt failure phenomenon.

도 1은 마그용접기의 전류-전압 특성도1 is a current-voltage characteristic diagram of a mag welder

도 2는 마그용접기의 CTWD-전압 특성도2 is a CTWD-voltage characteristic diagram of a mag welder

도 3은 종래의 고능률 마그용접용 토치의 사용 예시도Figure 3 is an illustration of the use of a conventional high efficiency mag welding torch

도 4는 본 발명의 구성도4 is a block diagram of the present invention

도 5는 본 발명의 실시 예시도5 is an exemplary embodiment of the present invention.

<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>

1. 용접팁 2. 가스분출기 3. 가스분출구1. Welding tip 2. Gas ejector 3. Gas outlet

4. 조절구 5. 가스노즐 6. 수냉부4. Control port 5. Gas nozzle 6. Water cooling part

7. 절연부 8. 용접토치 몸체 9. 아크7. Insulation 8. Welding Torch Body 9. Arc

10. 비드 11. 모재10. Bead 11. Base material

Claims (3)

용접전원을 공급하여 라이너를 통해 와이어가 송급되는 용접토치 몸체와, 상기 용접토치 몸체와 결합되는 가스노즐과, 상기 가스노즐 내부에 가스분출구가 형성된 가스분출기와, 상기 가스분출기에 결합되는 용접팁과, 상기 용접팁의 위치를 조절해주는 조절구로 형성되어 있는 것이 특징인 용접전압 조절이 가능한 고능률 마그용접용 토치A welding torch body supplying a welding power supply to a wire through a liner, a gas nozzle coupled to the welding torch body, a gas ejector having a gas ejection opening formed inside the gas nozzle, and a welding tip coupled to the gas ejector; High-efficiency mag welding torch with adjustable welding voltage, characterized in that it is formed as a control to adjust the position of the welding tip 고능률 마그용접의 용접토치에 있어서, 용접전압을 조절하는 목적으로 용접팁이 가스노즐 끝단보다 최소 5mm 이상 함몰된 형태로 설치된 것이 특징인 용접전압 조절이 가능한 고능률 마그용접용 토치High-efficiency mag welding torch, in which the welding tip is formed in the shape of recessed at least 5mm from the end of the gas nozzle for controlling the welding voltage. 제 1항에 있어서, 상기 가스노즐은 내부에 절연부(7) 및 수냉부(6)가 형성되어 있는 것이 특징인 용접전압 조절이 가능한 고능률 마그용접용 토치The gas nozzle of claim 1, wherein the gas nozzle has an insulating portion 7 and a water cooling portion 6 formed therein.
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KR102097761B1 (en) 2019-05-30 2020-04-06 김형준 a multipurpose emergency hood
KR102130647B1 (en) 2019-12-18 2020-07-07 김형준 a multipurpose emergency hood

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KR100970111B1 (en) 2008-03-17 2010-07-15 에스티엑스조선해양 주식회사 Contact-Tip to increase deposition efficiency

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102097761B1 (en) 2019-05-30 2020-04-06 김형준 a multipurpose emergency hood
KR102130647B1 (en) 2019-12-18 2020-07-07 김형준 a multipurpose emergency hood

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