KR102106227B1 - MIG welding method of high tensile steel - Google Patents
MIG welding method of high tensile steel Download PDFInfo
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- KR102106227B1 KR102106227B1 KR1020180166688A KR20180166688A KR102106227B1 KR 102106227 B1 KR102106227 B1 KR 102106227B1 KR 1020180166688 A KR1020180166688 A KR 1020180166688A KR 20180166688 A KR20180166688 A KR 20180166688A KR 102106227 B1 KR102106227 B1 KR 102106227B1
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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
- B23K9/16—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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- 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
- B23K9/0953—Monitoring or automatic control of welding parameters using computing means
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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
- B23K9/10—Other electric circuits therefor; Protective circuits; Remote controls
- B23K9/1006—Power supply
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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
- B23K9/32—Accessories
- B23K9/325—Devices for supplying or evacuating shielding gas
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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
- B23K2103/00—Materials to be soldered, welded or cut
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- B23K2103/04—Steel or steel alloys
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Abstract
Description
본 발명은 고장력강의 미그 용접방법에 관한 것으로, 보다 상세하게는 작업현장에서의 고장력강의 미그 용접에 있어서, 용접봉 사이즈, 전류, 전압, 전류형태, 극성 및 용접순서를 최적화하여 고장력강의 흠결 및 변형을 최소화하는 고장력강의 미그 용접방법에 관한 것이다.The present invention relates to a mig welding method of high-tensile steel, and more specifically, in mig welding of high-tensile steel at a work site, it is possible to optimize defects and deformation of high-strength steel by optimizing welding rod size, current, voltage, current type, polarity and welding order. It relates to a mig welding method of high-tensile steel to minimize.
곧 본발명은 용접 변수(용접 입열량 등)를 통해 변형을 제어하는 것에 관한 것이다. 변형 방지 기술의 배경에 대해 설명하면, 두께가 얇은 판재 용접 시 국부적인 온도구배가 생겨 변형이 발생하며 고장력강의 특성상 화염을 통한 교정을 하게 되면 강도가 저하되는 특성이 있음 이에 따라 기계교정을 해야하는데 형상이 복잡하고 강도가 높아 교정이 굉장히 어렵다. 이러한 이유로 용접시 변형을 최소화 시켜서 교정량을 최소화하는 발명에 관한 것이다.Soon, the present invention relates to controlling deformation through welding parameters (such as welding heat input). Describing the background of the deformation prevention technology, when welding a thin plate, a local temperature gradient occurs and deformation occurs. Due to the characteristics of the high-tensile steel, the strength of the steel is reduced when it is corrected through a flame. The shape is complex and the strength is high, making calibration very difficult. For this reason, the present invention relates to an invention for minimizing deformation during welding to minimize a correction amount.
일반적으로 고장력강의 미그용접방법에 대해 종래기술로서, 등록특허공보 등록번호 10-0217835호에는 와이어와 플락스를 이용하여 고장력강을 잠호용접하는 방법에 있어서, 상기 와이어가 중량%로, C:0.08-0.16%, Mn:1.4-2.2%, Mo:0.3-0.6%, Ni:0.4-0.8%, 잔부:Fe및 불가피한 불순물로 조성되고, 상기 플락스가 Al2O3:25-45%를 함유하고 하기식(1)로 표시되는 계산식에서 나타내는 염기도가 1.50 이상인 것을 포함하여 이루어지는 것을 특징으로 하는 고장력강의 잠호용접방법이 공개되어 있다. In general, as a conventional technique for the mig welding method of high-tensile steel, in the method of latent welding high-tensile steel using a wire and a flux in Patent Registration No. 10-0217835, the wire is in weight%, C: 0.08- 0.16%, Mn: 1.4-2.2%, Mo: 0.3-0.6%, Ni: 0.4-0.8%, balance: Fe and inevitable impurities, the flux contains Al2O3: 25-45% and the following formula ( A method for submersible welding of high-tensile steel has been disclosed, characterized in that it comprises a basicity of 1.50 or more represented by the calculation formula represented by 1).
또한 등록특허공보 등록번호 10-1267687호에는 미그용접에 대해, 불활성가스와 와이어를 사용하여 모재에 용접을 행하는 미그 용접에 있어서, 용접팁(2)과 모재(W) 간의 거리(L)는 자동조절장치(10)로서 조절하되, 상기 자동조절장치(10)는 와이어(3)와 모재(W) 사이의 거리변화에 따른 용접팁(2)에 인가되는 전류값을 실시간으로 측정하여, 측정된 측정값이 기준값보다 낮아지면 상기 자동조절장치(10)를 사용하여 용접팁과 모재 사이의 거리(L)를 가깝게 이동시키고, 측정된 측정값이 기준값보다 높아지면 용접팁과 모재 사이의 거리(L)를 멀게 이동시키되, 상기 기준값은 평균값으로 지정하며 상기 평균값은 단위시간당 계속하여 산출하여 용접을 행하는 중 신규로 측정되는 측정값을 단위수량당 평균화한 값으로 지정해줌으로써 시간경과에 따라 발생할 수 있는 오차를 최소화한 것이 특징인 미그 용접에서의 용접토치 자동 거리조절방법이 공개되어 있다. In addition, in the registered patent publication No. 10-1267687, for a mig welding, in a mig welding in which a base material is welded using an inert gas and a wire, the distance L between the welding tip 2 and the base material W is automatically Adjusted as a regulating device 10, the automatic regulating device 10 measured in real time by measuring the current value applied to the welding tip 2 according to the distance change between the wire 3 and the base material W When the measured value is lower than the reference value, the distance L between the welding tip and the base material is moved closer using the automatic adjustment device 10, and when the measured value is higher than the reference value, the distance between the welding tip and the base material (L) ), But the reference value is designated as the average value, and the average value is continuously calculated per unit time and can be generated over time by specifying the newly measured measurement value as the averaged value per unit quantity during welding. That the welding torch automatic distance control in MIG welding method is characterized by minimizing the error is disclosed.
그러나 상기 종래기술들은 고장력강 모재의 두께에 따라서 용접속도 등의 최적화된 용접방안이 되지 못하여 용접부위에 흠결이 발생하기 쉽고 작업시간이 오래걸리며 작업이 불편하다는 단점이 있었다. 곧 고장력강의 변형 발생할 수 있으며, 교정이 어렵다는 단점이 있었다.However, the above prior arts have disadvantages in that they cannot be optimized for welding speed and the like depending on the thickness of the high-strength steel base material, so that a defect is easily generated in a welded part and a long working time is uncomfortable. The deformation of high-tensile steel may occur soon, and there is a disadvantage that it is difficult to calibrate.
따라서 본 발명은 상기와 같은 문제점을 해결하고자 안출된 것으로, 본 발명은 고장력강을 미그용접방안에 의해 신속하고 용이하게 용접하며 작업이 편리하며 용접부위에 흠결이 적은 고장력강의 미그 용접방법을 제공하고자 하는 것이다. 또한, 고장력강의 용접 시 국부적인 가열로 인한 변형을 용접방법을 통해 해결하고자 하는 것이다.Therefore, the present invention has been devised to solve the above problems, and the present invention is to provide a high-strength mig welding method of high-strength steel that welds high-strength steel quickly and easily by means of a mig welding method, is convenient in operation, and has fewer defects on the welding area. . In addition, it is to solve the deformation caused by local heating when welding high-tensile steel through a welding method.
본발명은 고장력강의 미그 용접방법에 관한 것으로, 고장력강의 미그 용접에 있어서, 용접봉 사이즈는 1.2mm ~ 1.4mm 규격을 사용하며, 전류는 루트 전류는 200 ~ 220A이며, 잔여전류는 210 ~ 250A를 사용하며, 전압은 루트전압, 잔여전압 모두 23 ~ 25V이며, 전류형태 및 극성은 직류 역극성 DECP인 것을 특징으로 한다. 또한, 고장력강의 용접 시 국부적인 가열로 인한 변형을 입열량 제어와 용접순서로 변형 최소화하는 것을 특징으로 한다.The present invention relates to a mig welding method for high-tensile steel. In the mig welding of high-strength steel, the size of the welding rod uses a standard of 1.2 mm to 1.4 mm, the current is 200 to 220 A for the root current, and 210 to 250 A for the residual current. The voltage is 23 ~ 25V for both the root voltage and the residual voltage, and the current type and polarity are DC reverse polarity DECP. In addition, when welding high-tensile steel, it is characterized by minimizing deformation caused by local heating by controlling heat input and welding order.
따라서 본발명은 고장력강을 미그용접방안에 의해 신속하고 용이하게 용접하며 작업이 편리하며 용접부위에 흠결이 적은 현저한 효과가 있다.Therefore, the present invention has a remarkable effect that the high-strength steel is quickly and easily welded by the MIG welding method, the work is convenient, and there are few defects in the welding area.
도 1은 본발명 고장력강 제품의 용접순서도 1 is a welding flow chart of a high-strength steel product of the present invention
본발명은 고장력강의 용접방법에 관한 것으로, 고장력강의 미그 용접에 있어서, 용접봉 사이즈는 1.2mm ~ 1.4mm 규격을 사용하며, 전류는 루트 전류는 200 ~ 220A이며, 잔여전류는 210 ~ 250A를 사용하며, 전압은 루트전압, 잔여전압 모두 23 ~ 25V이며, 전류형태 및 극성은 직류 역극성 DECP인 것을 특징으로 한다. The present invention relates to a welding method for high-tensile steel. In the mig welding of high-tensile steel, the size of the welding rod uses a standard of 1.2mm to 1.4mm, the current is 200-220A for the root current, and the current 210-250A for the residual current. , The voltage is 23 ~ 25V for both the root voltage and the residual voltage, and the current type and polarity are DC reverse polarity DECP.
또한, 상기 미그 용접시 보호가스를 사용하는 것으로, 상기 보호가스성분은 질량비율로 98%Ar+2%O2 이며, 가스공급량은 18 ~ 25 리터/min인 것을 특징으로 한다.In addition, by using a protective gas during the welding of the mig, the protective gas component is characterized in that the mass ratio is 98% Ar + 2% O 2 and the gas supply is 18-25 liters / min.
또한, 상기 미그 용접의 용접속도는 8 ~ 20cm/min인 것을 특징으로 한다.In addition, the welding speed of the mig welding is characterized in that 8 ~ 20cm / min.
본발명을 첨부도면에 의해 상세히 설명하면 다음과 같다. 도 1은 본발명 고장력강 제품의 용접순서도이다. 본 발명은 예를 들어 상판으로 사용되는 고장력강 제품을 용접하는 경우 도면에서 나타낸 바와 같이 1-2-3-4-5-6의 순서로 용접한다.The present invention will be described in detail with reference to the accompanying drawings. 1 is a welding flow chart of a high-strength steel product of the present invention. In the present invention, for example, when welding a high-tensile steel product used as a top plate, welding is performed in the order of 1-2-3-4-5-6 as shown in the figure.
곧 1단계는 고장력강 상부철판의 중앙사각구멍의 하부에서 중앙사각구멍까지 수직 상방으로 용접하며, 2단계는 상부철판의 하변 좌측에서 우측으로 하부철판 리브까지 용접하며, 3단계는 상부철판의 상변 좌측에서 우측으로 하부철판 리브까지 용접하며, 4단계는 상기 2단계에 이어서 좌측에서 우측으로 용접하며, 5단계는 상기 3단계에 이어서 하부에서 상부로 용접하며, 마지막으로 6단계는 상기 4단계에 이어서 비스듬하게 우측철판의 경사면을 따라서 우측상부방향으로 용접한다. Soon, the first stage welds vertically from the bottom of the central square hole of the high-strength steel upper plate to the central square hole, the second stage welds from the lower left side of the upper plate to the lower plate rib, and the third stage is the upper left side of the upper plate. To the right side to the lower iron rib, step 4 is welded from left to right after step 2,
용접봉은 ER100S를 사용하며, 용접봉 사이즈는 1.2mm 내지 1.4mm 규격을 사용한다.The electrode ER100S is used, and the size of the electrode is 1.2mm to 1.4mm.
전류는 루트 전류는 200 ~ 220A이며, 잔여전류는 210 ~ 250A를 사용한다. 전압은 루트전압, 잔여전압 모두 23 ~ 25V이다. 전류형태 및 극성은 직류 역극성 DECP이다. 보호가스성분은 98%Ar+2%O2이다.The root current is 200 to 220A, and the remaining current is 210 to 250A. The voltage is 23 to 25V for both the root voltage and the residual voltage. The current type and polarity are DC reverse polarity DECP. The protective gas component is 98% Ar + 2% O2.
가스공급량은 18 ~ 25 리터/mim으로 하며, 컵(또는 노즐 크기)는 13 ~ 16mm 이다. 용접기 형태는 CV MIG를 사용한다. The gas supply is 18-25 liters / mim, and the cup (or nozzle size) is 13-16mm. CV MIG is used for the welding machine.
용접속도는 8 ~ 20cm/min이다. 모재온도 및 예열온도에 대해 기재하면, 상온이며, 단 모재온도가 -10℃이하일때는 반드시 22℃까지 예열 후 용접한다. 예열방법은 중성염 또는 전기열을 이용한다. The welding speed is 8 to 20 cm / min. When the base material temperature and the preheating temperature are described, it is at room temperature, but when the base material temperature is below -10 ° C, it must be preheated to 22 ° C before welding. The preheating method uses neutral salt or electric heat.
보호가스 이슬점은 최대 -57℃이다. 이면 비드 청결은 그라인딩 또는 가우징 방법을 사용한다.The protective gas dew point is up to -57 ° C. The back bead cleanliness uses a grinding or gouging method.
한편, 본 발명 고장력 강판의 미그용접 방법에 대한 실시례로서, 고장력강판을 미그용접하는데 있어서, 상기 고장력 강판의 두께에 따라 전극으로부터 강판의 용접면까지의 돌출길이를 하기 식 1에 의해 변화시켜 용접한다. 용접 입열량 제어를 통한 변형 제어를 한다.On the other hand, as an example of the method for mig welding a high-strength steel sheet of the present invention, in mig-welding a high-strength steel sheet, welding is performed by changing the protruding length from the electrode to the welding surface of the steel sheet according to Equation 1 according to the thickness of the high-tensile steel sheet. do. Deformation control through welding heat input control.
Heat Input = 60EI/V (E는 용접전압, I는 용접전류, V는 용접속도)Heat Input = 60EI / V (E is welding voltage, I is welding current, V is welding speed)
IE=aT+b - 식 1IE = aT + b-Equation 1
(IE는 전극으로부터 강판의 용접면까지의 길이(IE is the length from the electrode to the welding surface of the steel plate
T는 두께, T is the thickness,
a, b는 상수)a and b are constants)
그리고 상기 식 1에 의해 용접아크 발생 길이의 하기 식 2를 구하여 용접한다.Then, the following equation 2 of the welding arc generation length is obtained by the above equation 1 to be welded.
WL=IE(1-c) - 식 2WL = IE (1-c)-Equation 2
(WL은 용접아크 발생 길이, c는 상수)(WL is the length of the welding arc, c is the constant)
그리고 상기 고장력강판의 두께에 따라 용접시간(WT)을 하기 식 3에 의해 구해 용접한다.And the welding time (WT) according to the thickness of the high-tensile steel sheet is obtained by the following equation 3 and welded.
WT=dT-e - 식 3WT = dT-e-Equation 3
(WT는 두께별 용접시간(WT is welding time by thickness
d, e는 상수) d, e are constants)
또한, 상기 관계식 2, 3에 의하여 용접에서의 품질과 작업능률을 좌우하는 용접속도의 관계식 4를 구하게 된다.In addition, according to the relations 2 and 3, the relational expression 4 of the welding speed that determines the quality and work efficiency in welding is obtained.
WV=WL/WT - 식 4WV = WL / WT-Equation 4
(WV은 용접속도)(WV is welding speed)
그리고 용접와이어 공급속도는 상기 용접속도와의 상관관계식을 하기 식 5와 같이 구한다.And the supply speed of the welding wire is obtained by the following equation (5) for the correlation with the welding speed.
WRV=fWV - 식 4WRV = fWV-Equation 4
(WRV는 용접와이어 공급속도, f는 상수)(WRV is welding wire supply speed, f is constant)
따라서 본발명은 고장력강을 미그용접방안에 의해 신속하고 용이하게 용접하며 작업이 편리하며 용접부위에 흠결이 적은 현저한 효과가 있다. 또한 고장력강의 용접 변형이 최소화 되도록 대칭으로 용접을 진행하고 교정을 용이하게 할 수 있게 소조립체 단계에서 개별적으로 교정 후 다음 단계 용접 진행하는 것이다.Therefore, the present invention has a remarkable effect that the high-strength steel is quickly and easily welded by the MIG welding method, the work is convenient, and there are few defects in the welding area. In addition, welding is performed symmetrically so that welding deformation of the high-tensile steel is minimized, and calibration is individually performed in the small assembly stage and then welding is performed in the next step to facilitate calibration.
Claims (3)
상기 고장력강을 상판으로 사용하는 경우의 미그 용접방법은 1-2-3-4-5-6단계의 순서로 용접하는 것으로,
상기 1단계는 고장력강 상부철판의 중앙사각구멍의 하부에서 중앙사각구멍까지 수직 상방으로 용접하며, 2단계는 상부철판의 하변 좌측에서 우측으로 하부철판 리브까지 용접하며, 3단계는 상부철판의 상변 좌측에서 우측으로 하부철판 리브까지 용접하며, 4단계는 상기 2단계에 이어서 좌측에서 우측으로 용접하며, 5단계는 상기 3단계에 이어서 하부에서 상부로 용접하며, 마지막으로 6단계는 상기 4단계에 이어서 비스듬하게 우측철판의 경사면을 따라서 우측상부방향으로 용접하는 것이며,
보호가스성분은 질량비율로 98%Ar+2% O2이며,
가스공급량은 18 ~ 25 리터/mim이며, 컵 또는 노즐 크기는 13 ~ 16mm 이며, 용접속도는 8 ~ 20cm/min이고, 모재온도 및 예열온도는 상온이되, 모재온도가 -10℃ 이하일때는 22℃까지 예열 후 용접하는 것이며,
상기 고장력강을 미그용접하는데 있어서, 고장력 강판의 두께에 따라 전극으로부터 강판의 용접면까지의 돌출길이를 하기 식 1에 의해 변화시켜 용접하는 것으로, 용접 입열량 제어를 통한 변형 제어를 하는 것이며,
Heat Input = 60EI/V (E는 용접전압, I는 용접전류, V는 용접속도)
IE=aT+b - 식 1
(IE는 전극으로부터 강판의 용접면까지의 길이
T는 두께,
a, b는 상수)
그리고 상기 식 1에 의해 용접아크 발생 길이의 하기 식 2를 구하여 용접하는 것이며,
WL=IE(1-c) - 식 2
(WL은 용접아크 발생 길이,
c는 상수)
그리고 상기 고장력강판의 두께에 따라 용접시간(WT)을 하기 식 3에 의해 구해 용접하는 것을 특징으로 하는 고장력강의 미그 용접방법
WT=dT-e - 식 3
(WT는 두께별 용접시간,
d, e는 상수)As a mig welding method for high-tensile steel, the size of the welding rod uses the standard of 1.2mm to 1.4mm, the current is the root current of 200 to 220A, the residual current of 210 to 250A, and the voltage of the root voltage and the residual voltage are both 23 to 25V, the current form and polarity is DC reverse polarity DECP, in the high-strength steel mig welding method,
In the case of using the high tensile strength steel as a top plate, the mig welding method is to weld in the order of steps 1-2-3-4-5-6,
The first step is vertically welded from the bottom of the central square hole of the high-strength steel upper plate to the central square hole, the second step is welded from the lower left side of the upper plate to the lower plate rib, and the third step is the upper left side of the upper plate. From the bottom to the right side to the lower steel plate rib, step 4 is welded from left to right after step 2, step 5 is welded from bottom to top after step 3, and step 6 is followed by step 4 above. Welding at the upper right direction along the inclined surface of the right iron plate at an angle,
The protective gas component is 98% Ar + 2% O 2 in mass ratio,
The gas supply is 18 to 25 liters / mim, the cup or nozzle size is 13 to 16 mm, the welding speed is 8 to 20 cm / min, and the base material temperature and preheating temperature are at room temperature, but when the base material temperature is below -10 ° C, 22 Welding after preheating to ℃,
In mig welding the high-tensile steel, by varying the protruding length from the electrode to the welding surface of the steel sheet according to the thickness of the high-strength steel sheet by welding according to Equation 1 below, deformation control through welding heat input control is performed.
Heat Input = 60EI / V (E is welding voltage, I is welding current, V is welding speed)
IE = aT + b-Equation 1
(IE is the length from the electrode to the welding surface of the steel plate
T is the thickness,
a and b are constants)
Then, the following formula 2 of the welding arc generation length is obtained by the above formula 1, and welding is performed.
WL = IE (1-c)-Equation 2
(WL is the length of the welding arc,
c is a constant)
And the welding time (WT) according to the thickness of the high-strength steel sheet is obtained by the following formula 3 welding welding method of high-strength steel characterized in that the welding
WT = dT-e-Equation 3
(WT is welding time by thickness,
d, e are constants)
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| JPH09206940A (en) * | 1996-01-16 | 1997-08-12 | United Technol Corp <Utc> | Variable polarity welding technic for repairing coated parts |
| JP2018020361A (en) * | 2016-08-04 | 2018-02-08 | 株式会社神戸製鋼所 | Arc spot welding method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH09206940A (en) * | 1996-01-16 | 1997-08-12 | United Technol Corp <Utc> | Variable polarity welding technic for repairing coated parts |
| JP2018020361A (en) * | 2016-08-04 | 2018-02-08 | 株式会社神戸製鋼所 | Arc spot welding method |
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