KR910006731Y1 - Pre-heating control device of welding - Google Patents
Pre-heating control device of welding Download PDFInfo
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- KR910006731Y1 KR910006731Y1 KR2019880021075U KR880021075U KR910006731Y1 KR 910006731 Y1 KR910006731 Y1 KR 910006731Y1 KR 2019880021075 U KR2019880021075 U KR 2019880021075U KR 880021075 U KR880021075 U KR 880021075U KR 910006731 Y1 KR910006731 Y1 KR 910006731Y1
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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
- B23K9/18—Submerged-arc welding
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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
- B23K9/095—Monitoring or automatic control of welding parameters
- B23K9/0956—Monitoring or automatic control of welding parameters using sensing means, e.g. optical
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- Arc Welding In General (AREA)
Abstract
내용 없음.No content.
Description
제1도는 본 고안의 용접기조절을 위한 블록도.1 is a block diagram for adjusting the welder of the present invention.
제2도는 본 고안의 예열온도관리를 위한 블록도.2 is a block diagram for preheating temperature management of the present invention.
제3도는 제1,2도에 의한 본 고안장치의 상세한 구성을 나타내는 개락도.3 is an open view showing a detailed configuration of the present invention device according to the first and second.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1 : 용접기제어부분 2 : 버어너조절부분1: welding machine control part 2: burner adjusting part
10 : 광학온도센서 11,21 : 프리세트10: optical temperature sensor 11,21: preset
12,22 : 비교기 13 : 전자차폐기12,22: comparator 13: electronic shield
20 : 차분회로 23 : 낫게이트(not-gate)20: differential circuit 23: not-gate
본 고안은 주행장치가 내장된 서브머어지드 아아크용접기를 사용하는 용접에 있어서, 이는 특히 용접부의 예열온도를 일정범위로 유지시키기 위하여 온도센서 및 제어회로를 사용하여 용접시 용접부의 예열온도를 자동적으로 제어할수 있는 용접예열자동조절장치에 관한 것이다.The present invention is a welding using a submerged arc welder with a built-in traveling device, which automatically uses a temperature sensor and a control circuit to maintain the preheating temperature of the welding part at a certain range. The present invention relates to a welding preheating automatic control device that can be controlled.
일반적으로 용접구조물의 고성능화, 경량화추세에 다라 고장력강의 사용이 급증하고 고장력강 용접부의 건전성 확보가 큰 문제로 대두되고 있었다.In general, the use of high tensile steel has rapidly increased due to high performance and light weight of welded structures, and securing the integrity of high tensile steel welded parts has been a big problem.
상기 고장력강 용접부는 용접열싸이클(cycle)이 급열, 급냉되므로 용접부 재질열화, 비금속개재물, 용접부속도, 확산성 수소등에 의해 용접저온균열, 고온균열및 인성저하등 많은 문제점이 발생되는 것이었다.Since the high strength steel welding part is quenched and quenched in the heat cycle of the welding, many problems such as low temperature cracking, high temperature cracking, and toughness reduction occur due to deterioration of the welding part material, nonmetallic inclusions, welding part speed, and diffusible hydrogen.
이러한 일반적인 문제점을 극복하기 위하여, 용접시공시 강재등급에 따라 적정예열온도를 선정하여 시공하므로써 급열, 급냉의 열이력을 완화시키는 것이 중요한 개선책으로 알려져 있었다.In order to overcome this general problem, it is known that the heat transfer of quenching and quenching is alleviated by selecting the appropriate preheating temperature according to the steel grade during welding.
이러한 상기 고장력강 용접부의 건전성을 확보하기 위하여, 사용강재의 용접성 평가 및 적정시공조건선정이 가능한 많은 시험법들이 제안되어, 적용되고 있으며, 상기 시험법들중에 임플란트(implant)시험법과 경사 Y형구속균열시험법(JIS)이 가장 많이 적용되고 있었다.In order to secure the integrity of the high-strength steel welds, many test methods capable of evaluating weldability of steel materials and selecting proper construction conditions have been proposed and applied. Among these test methods, an implant test method and an inclined Y-shaped crack crack The test method (JIS) was the most applied.
즉, 상기 외부구속형 시험법인 임플란트시험법으로는, 사용강재의 균열감수성을 평가할 수 있으며, 상기 자구속형 시험법인 경사 Y형구속균열시험법으로는, 용접시공시 사용강재의 균열발생방지를 위한 한계예열온도를 설정할 수 있는 시험법인 것이다.That is, the implant test method, which is the externally constrained test method, can evaluate the crack susceptibility of the used steel, and the warp Y-type constrained crack test method, which is the self-contained test method, limits for preventing cracking of the used steel during welding construction. It is a test method that can set preheating temperature.
이와같이 상기 시험법으로 구한 강재의 균열감수성 및 한계예열온도를 근간으로 용접시공시 적정이음부설계, 용접법의 선택, 적정시공조건을 설정하고 용접시공전에 준비된 용접모재에 선정된 예열온도로 가열하므로서, 급냉, 급열의 용접열이력을 완만하게 유도하며, 용접균열의 발생원인인 용접부의 경화조직및 확산성수소의 영향을 억제하므로서 양호한 용접부를 얻을수 있어 고장력강을 적용한 용접시에는 전술한 바와같이 예열작업을 엄격하게 관리하고 있는 것이었다.Thus, based on the crack susceptibility and the limit preheating temperature of the steel obtained by the above test method, by designing the proper joint design, the selection of the welding method, the proper construction conditions, and heating to the preheating temperature selected on the welded base material prepared before welding, The welding heat history of quenching and quenching is induced smoothly, and the good welded part can be obtained by suppressing the influence of hardening structure and diffusive hydrogen of the welded part, which is the cause of weld cracking. It was managing.
현재 적용되고 있는 공지기술은 시공전 용접조건설정시 사용강재에 대하여 전술한 바와같은 예열온도를 설정하고, 설치된 용접모재에 대해 용접선을 따라 가스토오치(gas torch)나 가스버어너(gas burner)를 사용하여 가열하고, 용접부에 대해 용접자가 측정용 계측기나 온도측정용 크레용(tempilstick)등으로 검사한 후 일정온도에 도달되면 용접기에 전원을 연결하여 용접을 실시하게 되는 것이었다.Currently known technology is to set the preheating temperature as described above for the steel used when setting the welding conditions before construction, and the gas torch or gas burner along the welding line for the installed welding base material It was heated by using, and the welder inspected the welding part with a measuring instrument or a temperature measuring crayon (tempilstick), and then reached a certain temperature to connect the power to the welding machine to perform welding.
그러나, 이러한 작업공정은 작업자의 측정오차 및 목표온도를 일정하게 유지시키는데 어려운 점이 있었고, 에너지손실이 많이 발생함으로 고장력강 용접부의 건전성 확보를 위한 시공조건의 엄격한 관리에 문제점으로 지적되고 있는 것이었다.However, this work process was difficult to maintain a constant measurement error and target temperature of the operator, and because of the high energy loss was pointed out as a problem in the strict management of the construction conditions to ensure the integrity of high-tension steel welds.
본 고안은 상기와같은 종래의 문제점을 해결하기 위하여 안출한 것으로서, 이는 특히 용접부의 예열온도를 일정범위로 유지시키기 위하여 용접기 제어부분과 버너조절부분으로 구성하여 상기 용접부의 예열온도를 자동적으로 신속용이하게 제어할 수 있는 용접예열자동조절장치를 제공하는데 그 목적이 있는 것이다.The present invention is devised to solve the conventional problems as described above, which consists of a welder control part and a burner control part to maintain the preheating temperature of the welding part in a certain range, and thus, the preheating temperature of the welding part can be automatically and quickly used. The purpose of the present invention is to provide an automatic welding preconditioning device that can be controlled.
이하, 도면에 따라 이를 더욱 상세히 설명하면 다음과 같다.Hereinafter, this will be described in more detail with reference to the accompanying drawings.
즉, 본 고안은 제1도내지 제3도에서 도시한 바와같이 용접기 제어부분(1)과 버어너조절부분(2)과의 관련구성으로 된다.That is, the present invention has a related configuration between the welder control part 1 and the burner adjustment part 2 as shown in FIGS. 1 to 3.
상기 용접기 제어부분(1)은, 제1도에서 도시한 바와같이 용접기 조작을 위한 회로의 구성을 블록도로 나타낸 것으로 온도센서(10)와 목표예열온도를 설정하기위한 프리세트(preset)(11), 용접모재의 온도신호와 목표예열온도와를 비교하기위한 비교기(12), 용접전원(14)과 용접기(15)를 연결하기위한 전자차폐기(13)로 구성된다.The welder control part 1 is a block diagram showing the configuration of a circuit for manipulator operation, as shown in FIG. 1, and is a preset 11 for setting a temperature sensor 10 and a target preheating temperature. And a comparator 12 for comparing the temperature signal of the welding base material with the target preheating temperature, and an electromagnetic shield 13 for connecting the welding power source 14 and the welding machine 15.
상기 용접기제어부분(1)의 작동원리는 용접전에 미리 프리세트(11)에 목표예열온도(To)를 설정하면 상기 온도센서(10)로부터의 측정온도신호(T)와 상기 목표예열온도(To)를 비교기(12)에서 비교하여 용접부온도가 목표 에열온도(To)보다 높을 경우에 비교기(12)로부터 발생한 전기적 신호가 전자차폐기(13)로 보내져 용접기(15)에 전원(14)을 공급하여 용접작업이 진행되는 것이다.The operating principle of the welder control part 1 is to set the target preheating temperature To in the preset 11 before welding, and to measure the measurement temperature signal T from the temperature sensor 10 and the target preheating temperature To. ) Is compared in the comparator 12, when the welded part temperature is higher than the target heating temperature To, the electrical signal generated from the comparator 12 is sent to the electromagnetic shield 13 to supply the power source 14 to the welder 15. Welding is in progress.
또, 상기 버어너조절부분(2)은, 제2도에서 도시한 바와같이 가스버어너를 조절하기위한 회로구성을 블록도로 나타낸 것으로 상기 온도센서(10)와 목표예열프리세트(11), 측정온도(T)와 목표예열온도(To)와의 차이(△T)를 구하기 위한 차분회로(20), 온도범위프리세트(21)의 목표온도범위(△To)와 상기 차분회로(20)에서의 온도차이(△T)신호를 비교하기 위한 비교기(22), 상기 비교기(22)로부터의 전기적신호를 역전시키기 위한 낫게이트(not gate)(23), 버어너조절기(25)와 버어너(26)를 연결하는 전자차폐기(24)로 구성된다.In addition, the burner adjusting portion 2 is a block diagram showing a circuit configuration for adjusting the gas burner as shown in FIG. 2. The temperature sensor 10 and the target preheating preset 11 are measured. The difference circuit 20 for calculating the difference ΔT between the temperature T and the target preheat temperature To, the target temperature range ΔTo of the temperature range preset 21 and the difference circuit 20 Comparator 22 for comparing the temperature difference (ΔT) signal, not gate 23 for reversing the electrical signal from the comparator 22, burner regulator 25 and burner 26 It is composed of an electronic shield 24 for connecting).
상기 버어너조절부분(2)의 작동원리는 온도센서(10)의 측정온도(T)신호와 프리세트(11)의 목표예열온도(To)신호의 차이(△T)를 차분회로(20)에서 구하고, 상기 차분회로(20)에서 발생한 온도차이(△T)의 신호는 온도범위 프리세트(21)의 목표온도범위(△To)와 비교기(22)에서 비교되어진다.The operating principle of the burner control part 2 is to determine the difference ΔT between the measured temperature T signal of the temperature sensor 10 and the target preheat temperature To signal of the preset 11. The signal of the temperature difference ΔT generated in the difference circuit 20 is compared in the comparator 22 with the target temperature range ΔTo of the temperature range preset 21.
상기 차분회로(20)에서의 온도차이(△T)가 목표온도범위(△To)보다 높으면 상기 비교기(22)에서 전기적신호를 발생시켜 낫게이트(23)로 보내어지게되고, 신호를 받은 낫게이트(23)에서는 반대로 전기적신호를 발생시키지 않는다.When the temperature difference ΔT in the difference circuit 20 is higher than the target temperature range ΔTo, the comparator 22 generates an electrical signal and is sent to the nat gate 23, and the received nat gate In contrast, in 23, no electric signal is generated.
그리고, 역으로 차분회로(20)의 온도차이(△T)가 목표온도범위(△To)보다 낮으면 비교기(22)에서는 신호를 발생치 않지만 상기 낫게이트(23)에서 전기적신호를 발생시켜 전자차폐기(24)를 연결하여 가열작업이 실시되는 것이다.On the contrary, if the temperature difference ΔT of the differential circuit 20 is lower than the target temperature range ΔTo, the comparator 22 does not generate a signal but generates an electrical signal at the sick gate 23 to generate an electron. The shielding 24 is connected to a heating operation.
제3도에서는 용접기(15)의 제어와 온도관리를 위하여 전술한 장치를 조합한 것으로 구성된다.In FIG. 3, a combination of the above-described apparatuses for the control of the welding machine 15 and the temperature management is constructed.
즉, 용접기(15)의 상단에 고정된 온도센서(10)와 프리세트(11)는 용접기 제어부분(1)의 비교기(12)와, 버어너조절부분(2)의 차분회로(20)로 전기적 신호를 제공하도록 연결되고, 비교기(12)는 전자차페기(13)로 연결되며, 전자차폐기(13)는 전원(14)과 용접기(15)사이에서 비교기(12)의 신호에 따라 전원을 차단하거나 연결시켜 주도록 구성된다.That is, the temperature sensor 10 and the preset 11 fixed to the upper end of the welder 15 are connected to the comparator 12 of the welder control part 1 and the differential circuit 20 of the burner control part 2. Connected to provide an electrical signal, the comparator 12 is connected to the electronic shield 13, the electronic shield 13 is a power source according to the signal of the comparator 12 between the power source 14 and the welder 15 It is configured to block or connect.
그리고, 버어너 조절부분(2)의 차분회로(20)는 온도센서(10)와 프리세트(11)로부터 입력되고, 비교기(22)로 출력되도록 연결되며, 비교기(22)는 차분회로(20)와 온도범위 프리세트(21)로부터 입력되는 한편, 낫게이트(not-gate)(23)로 출력되도록 연결된다. 또한, 상기 낫게이트(23)는 비교기(22)로부터 입력되고, 버어너조절기(25)와 버어너(26)사이에서 버어너(26)를 작동시켜주거나 꺼주는 전자차폐기(24)로 출력되도록 연결된다.Then, the differential circuit 20 of the burner adjusting part 2 is input from the temperature sensor 10 and the preset 11 and connected to the comparator 22, and the comparator 22 is connected to the differential circuit 20. ) Is input from the temperature range preset 21 and is connected to the not-gate 23. In addition, the knock gate 23 is input from the comparator 22, and output to the electromagnetic shield 24 to operate or turn off the burner 26 between the burner controller 25 and burner 26 To be connected.
미설명부호 3은 모재, 30은 용접기(15)를 안내하는 가이드레일이다.Reference numeral 3 is a base material, 30 is a guide rail for guiding the welder (15).
이와같이 구성된 본 고안의 작동원리를 설명하면 다음과같다.The operation principle of the present invention configured as described above is as follows.
먼저, 용접모재(3)와 가이드레일(30), 용접기(15)를 설치한 후, 목표예열온도(To)를 프리세트(11)에, 목포예열온도범위(To)를 온도범위프리세트(21)에 설정하면, 상기 온도센서(10)로부터 감지되는 모재(3)표면 부의 측정온도신호(T)는 프리세트(11)의 목표예열온도(To)와 함께 비교기(12)와 차분회로(20)에 각각 보내어지게 되는 것이다.First, after the welding base material 3, the guide rail 30, and the welding machine 15 are installed, the target preheating temperature To is set to the preset 11, and the Mokpo preheating temperature range To is set to the temperature range preset. 21, the measured temperature signal T of the surface portion of the base material 3 sensed by the temperature sensor 10 together with the target preheating temperature To of the preset 11 together with the comparator 12 and the differential circuit ( 20 will be sent to each.
그리고, 용접을 개시하기위해 모재를 가열하는 단계에서는, 먼저 용접기 제어부분(1)의 비교기(12)에서 목표예열온도(To)와 측정온도(T)신호가 비교되고 측정온도(T)가 목표에열온도(To)보다 낮을 경우 신호를 발생시키지 않게되며, 따라서 전자차폐기(13)는 접속되지않게되어 용접기(15)에는 전원이 공급되지않게되어 용접기(15)에는 전원이 공급되지않게되고 용접작업이 실행되지 않는다.In the step of heating the base material to start welding, first, the target preheat temperature To and the measurement temperature T signal are compared in the comparator 12 of the welder control part 1 and the measurement temperature T is the target. If the heating temperature is lower than the To, no signal is generated. Therefore, the electromagnetic shield 13 is not connected to the welder 15, so that no power is supplied to the welder 15, and thus no power is supplied to the welder 15. Weld operation is not performed.
한편, 버어너조절부분(2)의 비교기(22)에서는 차분회로(20)에서 구해진 온도차이(△T)와 목표예열온도범위(△To)가 비교된다. 이때, 측정온도(T)가 목표예열온도(To)보다 낮을경우 차분회로(20)에서 구해진 온도차이(△T)는 목표예열온도범위(△To)보다 낮게되어 비교기(22)에서는 전기적신호가 발생하지 않는다. 그리나 비교기(22)와 연결된 낫게이트(23)에서는 이와반대로 전기적신호가 발생하여 전자차폐기(24)를 접속시키게되고 따라서 버어너(26)로부터 모재(3)에 가열이 시작된다.On the other hand, in the comparator 22 of the burner adjusting part 2, the temperature difference DELTA T obtained by the difference circuit 20 is compared with the target preheat temperature range DELTA To. At this time, when the measured temperature T is lower than the target preheating temperature To, the temperature difference ΔT obtained by the differential circuit 20 is lower than the target preheating temperature range ΔTo so that the electrical signal is generated in the comparator 22. Does not occur. However, in the gate gate 23 connected to the comparator 22, an electric signal is generated to connect the electron shield 24 to the substrate, and thus heating is started from the burner 26 to the base material 3.
보재(3)에 가열이 진행되어 측정온도(T)가 점차적으로 상승하면 용접기 제어부분(1)의 비교기(12)에서 측정온도(T)와 목표예열온도(To)가 비교되고 측정온도(T)가 목표예열온도(To)에 도달될때 비교기(12)에서 전기적신호가 발생하여 전자차폐기(13)가 접속되고 전원(14)이 용접기(15)에 공급되어 모재(3)의 용접작업이 시작된다. 그러나 용접이 진행됨에 따라 용접으로 인해 발생되는 열이나 버어너(26)의 계속적인 가열로 인하여 모재(3)의 온도가 과도하게 상승되면 버어너조절부분(2)의 비교기(22)에서는 차분회로(20)에서 구해진 온도차이(△T=T-To)가 목표예열온도범위(△To)보다 크게 되어 전기적 신호가 발생된다.When heating proceeds to the auxiliary material 3 and the measurement temperature T gradually rises, in the comparator 12 of the welder control part 1, the measurement temperature T and the target preheating temperature To are compared and the measurement temperature T ) Reaches the target preheating temperature (To), an electrical signal is generated in the comparator 12, the electromagnetic shield 13 is connected, the power supply 14 is supplied to the welding machine 15, the welding work of the base material 3 Begins. However, as the welding progresses, if the temperature of the base material 3 is excessively increased due to the heat generated by the welding or the continuous heating of the burner 26, the comparator 22 of the burner adjusting part 2 has a differential circuit. The temperature difference (ΔT = T-To) obtained at (20) is larger than the target preheat temperature range (ΔTo), so that an electrical signal is generated.
상기 전기적신호는 낫게이트(23)로 인가되고 상기 낫게이트(23)는 이와반대로 신호를 발생시키지 않게되며, 따라서 전자차폐기(24)는 차단되어 버어너(26)의 가열작업이 중단되는 것이다. 따라서 모재(3)의 과열 현상(overheating)이 방지된다.The electrical signal is applied to the sick gate 23 and the sick gate 23 does not generate a signal on the contrary, so that the electronic shield 24 is cut off so that the heating operation of the burner 26 is stopped. . Therefore, overheating of the base material 3 is prevented.
이후, 버어너(26)의 가열작업이 중단됨에 따라 모재(3)의 온도가 떨어져 측정온도(T)가 저하되고 차분회로(20)의 온도차이(△T)가 비교기(22)에서 목표예열온도범위(△To)보다 저하되면 상기 비교기(22)로부터 전기적신호가 발생되지 않게되고, 낫게이트(23)는 용접초기와 같은 전기적 신호를 발생시키므로써 상기 전자차폐기(24)가 재접촉되어 가열작업이 다시 시작하게되는 것이다. 이때, 용접기 제어부분(1)의 비교기(12)에서는 모재(3)의 측정온도(T)와 목표예열온도(To)가 계속적으로 비교되고, 측정온도(T)가 목표예열온도(To)보다 높은한 계속적으로 용접작업을 진행하게 된다.Subsequently, as the heating operation of the burner 26 is stopped, the temperature of the base material 3 is lowered so that the measurement temperature T is lowered and the temperature difference ΔT of the differential circuit 20 is preheated by the comparator 22. When the temperature range is lower than ΔTo, an electrical signal is not generated from the comparator 22, and the sick gate 23 generates an electrical signal such as a welding initial stage so that the electronic shield 24 is recontacted. The heating operation will start again. At this time, in the comparator 12 of the welder control part 1, the measurement temperature T of the base material 3 and the target preheating temperature To are continuously compared, and the measurement temperature T is smaller than the target preheating temperature To. As long as the welding work continues.
상기와같이 버어너(26)의 가열작업이 용접진행중에 계속 반복수행하므로써 용접초기는 물론 용접중에도 용접와이어가 지나가는 용접모재(3)의 온도를 일정하게 유지시키게 되는 것이다.As described above, the heating operation of the burner 26 is repeatedly performed during the welding process, thereby maintaining the temperature of the welding base material 3 through which the welding wire passes even during the initial welding and during the welding.
이와같이 된 본 고안은 용접시공시 많은 적용되는 예열작업을 일정온도 범위내에서 자동으로 조절, 수행하므로써, 용접시공관리철저, 에너지(energy)손실방지및, 생산성향상이 가능하여 현장활용성이 매우 높은 실용적인 고안이다.In this way, the present invention automatically adjusts and performs a lot of preheating operations during a welding process within a certain temperature range, so that it is possible to thoroughly manage welding construction, prevent energy loss, and improve productivity, and thus have high field utilization. It is a practical design.
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| KR101028386B1 (en) * | 2010-08-31 | 2011-04-13 | 터보파워텍(주) | Rotary welding apparatus |
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| KR101028386B1 (en) * | 2010-08-31 | 2011-04-13 | 터보파워텍(주) | Rotary welding apparatus |
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