KR102139433B1 - A Method for Manufacture of ERW Stainless pipe - Google Patents

A Method for Manufacture of ERW Stainless pipe Download PDF

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KR102139433B1
KR102139433B1 KR1020190041684A KR20190041684A KR102139433B1 KR 102139433 B1 KR102139433 B1 KR 102139433B1 KR 1020190041684 A KR1020190041684 A KR 1020190041684A KR 20190041684 A KR20190041684 A KR 20190041684A KR 102139433 B1 KR102139433 B1 KR 102139433B1
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South Korea
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stainless steel
welding
pipe
frequency welding
welding machine
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KR1020190041684A
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Korean (ko)
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김삼종
성미란
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(주)두인티앤피
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/08—Making tubes with welded or soldered seams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/30—Finishing tubes, e.g. sizing, burnishing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/06—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles
    • B21D5/10—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles for making tubes
    • B21D5/12—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles for making tubes making use of forming-rollers
    • 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
    • B23K11/00—Resistance welding; Severing by resistance heating
    • B23K11/06—Resistance welding; Severing by resistance heating using roller electrodes
    • B23K11/061—Resistance welding; Severing by resistance heating using roller electrodes for welding rectilinear seams
    • B23K11/062—Resistance welding; Severing by resistance heating using roller electrodes for welding rectilinear seams for welding longitudinal seams of tubes
    • 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
    • B23K13/00—Welding by high-frequency current heating
    • B23K13/04—Welding by high-frequency current heating by conduction heating
    • B23K13/043—Seam welding
    • B23K13/046—Seam welding for tubes
    • 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
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/70—Auxiliary operations or equipment
    • B23K26/702—Auxiliary equipment
    • B23K26/703—Cooling arrangements

Abstract

According to the present invention, a manufacturing method of an ERW stainless steel pipe moves a stainless steel plate of a prescribed thickness and width supplied from a roll (110) between rollers to roll the stainless steel plate from an edge to form a pipe to perform high-frequency welding on a gap by a high-frequency welding machine using high-frequency electric resistance heating to manufacture a stainless steel pipe, and comprises: a step of welding the inside of the gap of a rolled pipe first by a first high-frequency welding machine (131); a step of rapidly cooling a weld portion by the first high-frequency welding machine (131) by a first cooling injector (141) at 1,040°C or higher; a step of welding the outside of the gap of the portion welded by the first high-frequency welding machine (131) by a second high-frequency welding machine (132); a step of rapidly cooling a weld portion by the second high-frequency welding machine (132) by a second cooling injector (141) at 1,040°C or higher; and a step of passing through a stainless steel pipe drawing machine (170) manufactured by an ERW method to form a stainless steel pipe with a perfectly circular cross section. A stainless steel pipe manufactured by preventing stress creation caused by welding by rapid cooling passes through the drawing machine to manufacture a perfectly circular stainless steel pipe.

Description

ERW 스텐파이프 제조방법{A Method for Manufacture of ERW Stainless pipe}ERW stainless pipe manufacturing method {A Method for Manufacture of ERW Stainless pipe}

본 발명은 롤(110)에서 공급되는 소정 두께 및 폭의 스텐레스 판재를 롤러 사이로 통과시켜 가장자리에서부터 말아서 파이프를 형성하여 틈새를 고주파 전기저항 발열을 이용하는 고주파용접기에 의해 고주파 용접하여 스텐파이프를 제조하는 ERW 스텐파이프 제조방법에 있어서,In the present invention, a stainless steel plate having a predetermined thickness and width supplied from the roll 110 is passed between rollers to roll a pipe to form a pipe, and the gap is formed by welding with a high frequency welding machine using high frequency electric resistance heating to produce a stainless steel ERW. In the stainless steel pipe manufacturing method,

말린 파이프 틈새의 안쪽을 제1고주파용접기(131)에 의해 먼저 용접하는 단계,First welding the inside of the dried pipe gap by the first high frequency welding machine (131),

제1고주파용접기(131)에 의한 용접부위를 1040℃이상에서 제1냉각용 분사기(141)에 의해 급속 냉각하는 단계,Rapid cooling of the welding area by the first high frequency welding machine (131) by the first cooling injector (141) at 1040°C or higher,

제1고주파용접기(131)에 의해 용접된 부위의 틈새 바깥쪽을 제2고주파용접기(132)로 용접하는 단계,Welding the outside of the gap of the portion welded by the first high frequency welding machine 131 to the second high frequency welding machine 132,

제2고주파용접기(131)에 의한 용접부위를 1040℃이상에서 제2냉각용 분사기(141)에 의해 급속 냉각하는 단계,Rapid cooling of the welding area by the second high frequency welding machine (131) by the second cooling sprayer (141) at 1040°C or higher,

ERW 방식에 의해 제조된 스텐파이프 인발기(170)를 통과시켜 단면적이 정원(正圓)인 스텐파이프를 형성하는 단계,를 포함하는 것을 특징으로 하는 ERW 스텐파이프 제조방법에 관한 것으로,A method for manufacturing an ERW stainless steel pipe comprising the steps of passing through the stainless steel pipe drawing machine 170 manufactured by the ERW method to form a stainless steel pipe having a cross-sectional area,

용접으로 인한 응력발생을 급속냉각으로 방지하여 제조된 스텐파이프를 인발기를 통과시켜 정원의 스텐파이프를 제조할 수 있게 된 것이다.It is possible to manufacture the stainless steel pipe in the garden by passing the drawing machine through the drawing machine to prevent the stress generated by welding by rapid cooling.

스텐레스 파이프 제조방법에는 판재를 말아서 용접하는 조관기에서 Roller를 여러 단계 거치면서 파이프 형상으로 만들고 용접기로 용접을 해서 파이프를 제조하는 ERW(Electric Resistance Weling) 방법과, 인발(Drawing)과정을 통하여 제조하는 비용접방식인 심레스(Seamless) 방법이 있다.In the stainless steel pipe manufacturing method, an electric resistance welding (ERW) method for manufacturing a pipe by welding a sheet in a pipe machine while welding a sheet of material by rolling the rollers through several stages, and the cost of manufacturing through a drawing process There is a seamless method.

ERW 방식은 소정 두께와 폭의 판재를 롤에서 풀면서 공급하고, 롤러 사이로 차례로 통과시켜 가장자리에서부터 말아서 파이프 형상을 형성하고 틈새를 고주파 용접에 의해 접합시켜 파이프를 제조하는 방식으로서, 스텐레스 판재의 두께가 2.0mm이상 정도로 두꺼워지고 파이프 외경이 25.4mm이하로 작아지면 말기가 어렵고 단번에 용접에 의해 제조하기가 어려웠으며, 또한 ERW 방법에 의해 제조된 파이프는 말아서 용접에 의해 제조되는 관계는 단면적이 정확한 원이 되지 않고 비뚤어진 원형을 하거나 표면이 매끈하지 못한 문제점이 있었으며 이로 인하여 정밀 파이프로 사용하는데 한계가 있었다.The ERW method is a method of manufacturing a pipe by supplying a sheet of a predetermined thickness and width while unrolling it from a roll, passing through rollers in turn to form a pipe shape by rolling from the edge, and joining the gap by high-frequency welding to produce a pipe. If it is thicker than 2.0mm and the outer diameter of the pipe is smaller than 25.4mm, it is difficult to roll and difficult to manufacture by welding at once. Also, the pipe manufactured by the ERW method is rolled up, and the relationship produced by welding is a circle with accurate cross-sectional area. There was a problem that the surface was not crooked or not smooth, and there was a limit to use it as a precision pipe.

종래기술로서 등록특허 제10-1414552호에 텅스텐 아크용접에 의한 틈새 내부용접을 선행하고 소정 거리를 두고 서브 머지드 아크용접에 의한 외부 용접을 후행하는 복합용접에 의한 강관제조방법이 공지되어 있다.As a prior art, a method of manufacturing a steel pipe by composite welding is known in Patent No. 10-1414552 by precedent internal welding by a tungsten arc welding and followed by external welding by a submerged arc welding at a predetermined distance.

2개의 용접기로 1차로 틈새 내부를 용접하고 2차로 용접하더라도 고주파열에 의해 스텐레스를 용융 부착하는 ERW 방법은 융착부위에 응력이 발생하기 때문에 인발기를 통과시키면 응력부분이 동일하게 늘어나지 못하고 파손될 수 있어 인발에 의한 정원 파이프를 제조하기 어려웠다.Even if the inside of the gap is first welded with two welding machines and the welding is performed with the second welding, the ERW method of melting and attaching stainless steel by high-frequency heat creates stress in the fusion zone. It was difficult to produce garden pipes.

또한 ERW 방법은 두께가 2.0mm 정도 이상, 외경이 25.4mm 정도 이하의 스텐파이프 제조에는 말아서 용접해도 정원 파이프가 형성되지 않아 제조할 수 없었던 것을 본 발명은 용융 용접 후 1040℃이상에서 급속냉각시켜 응력 축적을 방지할 수 있었으며, 응력이 제거된 ERW 스텐파이프를 인발기를 통과시켜 단면 모양이 형성되도록 할 수 있었던 것이다.In addition, the ERW method has a thickness of about 2.0 mm or more, and an outer diameter of about 25.4 mm or less. In the manufacture of stainless pipes, even if rolled and welded, garden pipes were not formed and thus, the present invention was rapidly cooled at 1040° C. or higher after melt welding. Accumulation could be prevented, and a cross-sectional shape could be formed by passing the ERW stainless pipe from which the stress was removed through a drawing machine.

본 발명은 스텐레스는 다른 강재와 달리 1040℃이상에서 급속 냉각시키면 응력이 제거되는 특성을 이용하여 2중 고주파 용접과 급속 냉각분사에 의해스텐파이프를 제조하는 과정에 인발기를 통과시켜 표면이 매끈하고 정원의스텐파이프를 제조할 수 있게 된 것으로, 두께가 2.0mm 정도 이상, 외경이 25.4mm 정도 이하의 스텐파이프도 ERW 정원 파이프 제조가 가능하게 된 것이다.In the present invention, unlike other steel materials, the surface is smooth by passing the drawer through the process of manufacturing the stainless pipe by double high-frequency welding and rapid cooling spray using the property that stress is removed when rapidly cooled at 1040°C or higher, unlike other steel materials. The ERW garden pipe can be manufactured for stainless steel pipes with a thickness of about 2.0 mm or more and an outer diameter of about 25.4 mm or less.

또한, 스텐파이프는 외경, 두께 등으로 규격화되어 있으며, ERW 스텐파이프, 특히 두께가 2.0mm 정도 이상, 외경이 25.4mm 정도 이하의 스텐파이프는 외경이 일정한 정원이 어렵기 때문에 규격화한 파이프를 제조할 수 없었던 것을 본 발명은 1차고주파 융착, 1차냉각, 2차고주파 융착, 2차냉각, 인발을 통하여 정원의 규격화된 ERW 스텐파이프를 제조 공급할 수 있게 된 것이다.In addition, stainless steel pipes are standardized for outer diameter, thickness, etc., and ERW stainless steel pipes, especially for stainless steel pipes with a thickness of about 2.0 mm or more and an outer diameter of about 25.4 mm or less, are difficult to garden with a fixed outer diameter. The present invention has been unable to manufacture and supply standardized ERW stainless pipes of the garden through primary high frequency fusion, primary cooling, secondary high frequency fusion, secondary cooling, and drawing.

본 발명은 제1고주파용접기에 의한 틈새의 내부 1차용접, 1차 급속냉각, 제2고주파용접기에 의한 1차용접 외부의 용접, 2차 급속 냉각으로 응력 및 핀홀이 제거된 ERW 스텐파이프를 인발기를 통과시켜 두께가 2.0mm 정도 이상, 외경이 25.4mm 정도 이하의 스텐파이프까지도 정원의 스텐파이프를 제조하는 ERW 스텐파이프 제조방법을 제공함을 발명의 목적으로 한다.The present invention draws the ERW stainless steel pipe from which stress and pinholes have been removed by welding the outside of the primary welding by the first high-frequency welding, the first rapid cooling, the first welding by the second high-frequency welding, and the second rapid cooling. It is an object of the present invention to provide an ERW stainless steel pipe manufacturing method for manufacturing a stainless steel pipe, even through stainless steel pipes having a thickness of about 2.0 mm or more and an outer diameter of about 25.4 mm or less by passing through a group.

또한 본 발명은 ERW 스텐파이프를 인발기를 통과시켜 정원의 규격화된 스텐파이프 제조를 목적으로 한다.In addition, the present invention aims to manufacture a standardized stainless steel pipe in a garden by passing an ERW stainless steel pipe through a drawing machine.

본 발명은 롤(110)에서 공급되는 소정 두께 및 폭의 스텐레스 판재를 롤러 사이로 통과시켜 가장자리에서부터 말아서 파이프를 형성하여 틈새를 고주파 전기저항 발열을 이용하는 고주파용접기에 의해 고주파 용접하여 스텐파이프를 제조하는 ERW 스텐파이프 제조방법에 있어서,In the present invention, a stainless steel plate having a predetermined thickness and width supplied from the roll 110 is passed between rollers to roll a pipe to form a pipe, and the gap is formed by welding with a high frequency welding machine using high frequency electric resistance heating to produce a stainless steel ERW. In the stainless steel pipe manufacturing method,

말린 파이프 틈새의 안쪽을 제1고주파용접기(131)에 의해 먼저 용접하는 단계,First welding the inside of the dried pipe gap by the first high frequency welding machine (131),

제1고주파용접기(131)에 의한 용접부위를 1040℃이상에서 제1냉각용 분사기(141)에 의해 급속 냉각하는 단계,Rapid cooling of the welding area by the first high frequency welding machine (131) by the first cooling injector (141) at 1040°C or higher,

제1고주파용접기(131)에 의해 용접된 부위의 틈새 바깥쪽을 제2고주파용접기(132)로 용접하는 단계,Welding the outside of the gap of the portion welded by the first high frequency welding machine 131 to the second high frequency welding machine 132,

제2고주파용접기(131)에 의한 용접부위를 1040℃이상에서 제2냉각용 분사기(141)에 의해 급속 냉각하는 단계,Rapid cooling of the welding area by the second high frequency welding machine (131) by the second cooling sprayer (141) at 1040°C or higher,

ERW 방식에 의해 제조된 스텐파이프 인발기(170)를 통과시켜 단면적이 정원(正圓)인 스텐파이프를 형성하는 단계,를 포함하는 것을 특징으로 하는 ERW 스텐파이프 제조방법에 관한 것으로,A method for manufacturing an ERW stainless steel pipe comprising the steps of passing through the stainless steel pipe drawing machine 170 manufactured by the ERW method to form a stainless steel pipe having a cross-sectional area,

용접으로 인한 응력발생을 급속냉각으로 방지하여 제조된 스텐파이프를 인발기를 통과시켜 정원의 스텐파이프를 제조할 수 있게 된 것이다.It is possible to manufacture the stainless steel pipe in the garden by passing the drawing machine through the drawing machine to prevent the stress generated by welding by rapid cooling.

이러한 목적을 달성하기 위하여, 본 발명은 롤(110)에서 공급되는 소정 두께 및 폭의 스텐레스 판재를 롤러 사이로 통과시켜 가장자리에서부터 말아서 파이프를 형성하여 틈새를 고주파 전기저항 발열을 이용하는 고주파용접기에 의해 고주파 용접하여 스텐파이프를 제조하는 ERW 스텐파이프 제조방법에 있어서,In order to achieve this object, the present invention is a high-frequency welding by a high-frequency welding machine using a high-frequency electrical resistance heating to form a pipe by rolling a stainless steel plate of a predetermined thickness and width supplied from the roll 110 between the rollers to roll from the edge. In the ERW stainless steel pipe manufacturing method for manufacturing a stainless steel pipe,

말린 파이프 틈새의 안쪽을 제1고주파용접기(131)에 의해 먼저 용접하는 단계,First welding the inside of the dried pipe gap by the first high frequency welding machine (131),

제1고주파용접기(131)에 의한 용접부위를 1040℃이상에서 제1냉각용 분사기(141)에 의해 급속 냉각하는 단계,Rapid cooling of the welding area by the first high frequency welding machine (131) by the first cooling injector (141) at 1040°C or higher,

제1고주파용접기(131)에 의해 용접된 부위의 틈새 바깥쪽을 제2고주파용접기(132)로 용접하는 단계,Welding the outside of the gap of the portion welded by the first high frequency welding machine 131 to the second high frequency welding machine 132,

제2고주파용접기(131)에 의한 용접부위를 1040℃이상에서 제2냉각용 분사기(141)에 의해 급속 냉각하는 단계,Rapid cooling of the welding area by the second high frequency welding machine (131) by the second cooling sprayer (141) at 1040°C or higher,

ERW 방식에 의해 제조된 스텐파이프 인발기를 통과시켜 단면적이 정원(正圓)인 스텐파이를 형성하는 단계,를 포함하는 것을 특징으로 하는 ERW 스텐파이프 제조방법에 관한 것이다.It relates to a method for manufacturing an ERW stainless steel pipe, characterized in that it comprises the step of forming a stainless steel pipe having a cross-sectional area by passing through a stainless steel pipe drawn by the ERW method.

지금까지 고주파 용접에 의한 ERW식 스텐파이프 제조는 두께 2.0mm 정도 이하, 외경이 25.4mm 정도 이상인 경우에만 가능하였으며, 두께 2.0mm 정도 이상, 외경이 25.4mm 정도 이하인 경우는 말기도 어렵고 제조 후 정원 상태에서 많이 벗어나 품질이 저하되어 제조되지 못하였다.Until now, the manufacture of ERW type stainless steel pipes by high frequency welding was only possible when the thickness was less than 2.0mm and the outer diameter was about 25.4mm or more, and it was difficult to roll when the thickness was about 2.0mm or larger and the outer diameter was about 25.4mm or less The quality was deteriorated because it was not much, and it was not manufactured.

본 발명은 제1고주파기 용접 후 1040℃이상의 고온상태에서 용접부분을 급속냉각시킨 다음 제2고주파기에 의한 1차용접이 이루어지고, 제2고주파용접기에 의한 용접 후 1040℃이상의 고온상태에서 용접부분을 2차 급속냉각으로 용접부분에 응력발생과 핀홀생성을 방지할 수 있었으며, 원형에서 휘어지거나 찌그러진 파이프를 인발기에 통과시켜 매끈하면서 정원의 스텐파이프를 제조할 수 있었다.In the present invention, after welding the first high frequency, the welding part is rapidly cooled in a high temperature state of 1040°C or higher, and then the first welding is made by the second high frequency welding machine, and then welded at a high temperature of 1040°C or higher after welding by the second high frequency welding machine. The second rapid cooling prevented stress generation and pinhole formation in the welding part, and it was possible to manufacture a stainless steel pipe while smoothly passing a pipe bent or crushed in a circular shape through a drawing machine.

만약, 급속냉각에 의한 제조로 응력을 제거하지 않게 되면 인발과정에서 파이프가 고르게 인발되지 못하고 파손 등이 발생할 수 있으며, 본 발명을 1040℃이상의 고온상태에서 급속냉각함으로써 응력을 방지되는 스텐리스의 특성을 이용하여 1차 및 2차 냉각에 의해 응력축적을 없애면서 스텐파이프를 제조한 다음 인발기를 통과시켜 정원파이프를 제조하는 것이다.If the stress is not removed by manufacturing by rapid cooling, the pipe may not be drawn evenly during the drawing process and damage may occur, and the stainless steel is characterized by preventing stress by rapidly cooling the present invention at a high temperature of 1040°C or higher. It is to manufacture the stainless steel pipe by removing the stress accumulation by primary and secondary cooling by using, and then passing the drawing machine to produce the garden pipe.

본 발명은 제1고주파기 용접 후 1040℃이상의 고온상태에서 용접부분을 급속냉각시킨 다음 제2고주파기에 의한 1차용접이 이루어지고, 제2고주파용접기에 의한 용접 후 1040℃이상의 고온상태에서 용접부분을 2차 급속냉각으로 용접부분에 응력발생과 핀홀생성을 방지하여 제조된 스텐파이프를 인발기를 통과시켜 말아서 용접하는 ERW 제조방식으로 원형에서 휘어지거나 찌그러진 파이프를 인발기에 통과시켜 인발함으로써 매끈하면서 정원의 스텐파이프를 제조할 수 있는 효과가 있으며, 종래 말아서 용접하는 관계로 비원형 찌그러짐의 문제로 ERW식으로 제조할 수 없었던 두께 2.0mm 정도 이하, 외경이 25.4mm 정도 이상인 스텐파이프까지도 정원 스텐파이프를 제조할 수 있게 되었으며 정밀파이프로 품질높은 ERW 스텐파이프를 생산, 공급할 수 있게 된 것이다.In the present invention, after welding the first high frequency, the welding part is rapidly cooled in a high temperature state of 1040°C or higher, and then the first welding is made by the second high frequency welding machine, and then welded at a high temperature of 1040°C or higher after welding by the second high frequency welding machine. This is an ERW manufacturing method that rolls and welds the stainless steel pipe that is manufactured by preventing the generation of stress and pinholes in the welding part by the second rapid cooling, and then rolls the bent or crushed pipes through the drawer and draws them to smooth the garden. It has the effect of being able to manufacture stainless steel pipes, and even for stainless steel pipes with a thickness of about 2.0 mm or less and an outer diameter of about 25.4 mm or more that could not be produced by the ERW method due to the problem of non-circular distortion due to rolled welding. It is possible to produce and supply high-quality ERW stainless steel pipes with precision pipes.

또한 본 발명은 ERW 스텐파이프를 인발기를 통과시킴으로써 규격화한 스텐파이프를 제조할 수 있는 효과가 있다.In addition, the present invention has the effect of producing a standardized stainless pipe by passing the ERW stainless pipe through a drawing machine.

도 1: 본 발명의 구성도를 나타낸 것이다.
도 2: 스텐판재를 공급하는 롤을 보여준 것이다.
도 3: 스텐판재가 롤 사이로 들어가고 있는 것을 보여주는 것이다.
도 4: 스텐판재가 양쪽 가장자리부터 말리 는 것을 보여주는 것이다.
도 5: 스텐판재가 반원형으로 말린 모습을 보여주는 것이다.
도 6: 고주파 융착 및 아르곤 급속냉각의 일 실시예을 보여주는 것이다.
도 7: 인발기 실시예를 보여주는 것이다.
도 8: 제조된 스텐파이를 절단하는 것을 보여주는 것이다.Figure 1: shows the configuration of the present invention.
Figure 2: shows a roll for supplying a sheet material.
Fig. 3: shows that the sheet material is entering between the rolls.
Figure 4: shows that the sheet material is dried from both edges.
Figure 5: shows the appearance of the stainless steel plate is dried in a semicircle.
Figure 6: shows an embodiment of high-frequency fusion and rapid argon cooling.
Figure 7: shows an embodiment of the drawer.
Figure 8: It shows that cutting the prepared stainless pie.

도 2 내지 도 8은 고주파용접기를 사용하는 ERW 스텐파이스 실시예를 보여주고 있는 것이다.2 to 8 show an ERW stainless steel embodiment using a high-frequency welding machine.

도 2는 소정 두께 및 폭의 스텐판재 (111)라 롤(110)에서 공급되고 있으며, 도 3와 같이 스텐판재(111)는 양쪽으로 늘어선 롤 사이를 통과하면 서 도 4 및 도 5와 같이 스텐판재는 양쪽 가장자리에서 말리기 시작하여 원통형 파이프 형태를 형성하게 된 다.2 is supplied from a roll 110 called a stainless steel plate 111 having a predetermined thickness and width, and as shown in FIG. 3, the stainless steel plate 111 passes through between the rolls lined on both sides, and the stainless steel is shown in FIGS. 4 and 5. The sheet material begins to dry on both edges, forming a cylindrical pipe shape.

도 6에서 파이프 형태로 말린 형태에서 가장자리가 맞닿는 틈새(119) 부분을 먼저 제1 고주파용접(131)기에 틈새(119) 내부를 용융접합하게 되고 의해 아르곤가스를 사용하여 1차 급속냉각이 이루어진 후 제2고주파용접기(132)에 1차 용접부위 외부를 융착하게 되며, 2차용접 이후 아르곤가스를 사용하여 1차 급속냉각이 이루어지는 것을 보여주고 있다. In FIG. 6, in the dried form in the form of a pipe, a portion of the gap 119 where the edges abut is first melt-bonded inside the gap 119 to the first high-frequency welding 131, followed by primary rapid cooling using argon gas. It shows that the first welding part is fused to the second high frequency welding machine 132, and the first rapid cooling is performed using argon gas after the second welding.

도 7에서 응력축적 없이 제조된 스텐파이프를 인발기(170)를 통과시켜 정원의 파이프를 생산하는 것이며, 도 7에서 절단공정을 보여주는 것이다.The stainless pipe manufactured without stress accumulation in FIG. 7 is passed through the drawing machine 170 to produce a garden pipe, and the cutting process is illustrated in FIG. 7.

위와 같은 스텐판 말기, 1차 고주파융착, 1차 급속냉각, 2차고주파 융착, 2차 급속냉각, 인발의 공정순서로 본 발명은 응력과 핀홀 없이 제조할 수 있었으며, 인발기를 통과시킴으로써 단면적이 정원인 스텐파이프를 얻을 수 있었으며, 이는 ERW 스텐파이프 제조의 한 단계 업그레이드된 것을 확인할 수 있었다.The process of the present invention in the order of the end of the above stainless steel plate, the first high-frequency fusion, the first rapid cooling, the second high-frequency fusion, the second rapid cooling, and the drawing, the present invention could be manufactured without stress and pinholes, and the cross-sectional area was reduced by passing through the drawing machine. It was possible to obtain a phosphorous stainless steel pipe, which confirmed that the ERW stainless steel pipe was upgraded one step.

도 1은 본 발명의 용접기 및 분사기를 설치한 구성을 나타내고 있는 것으로, 롤러(115) 사이를 통과는 스텐판재는 파이프형태가 형성되면서 양 가장자리가 말린 상태에서 맞닿게 되고 맞닿는 틈새를 제1차고주파용접기(131)에 의한 1차 고주파 융착한다.1 is a view showing a configuration in which a welding machine and an injector of the present invention are installed, and the stainless steel plate passing between the rollers 115 is formed in a pipe shape, so that both edges are brought into contact with each other in a dried state, and a first high frequency is generated. The primary high-frequency welding is performed by the welding machine 131.

스텐레스는 1800℃이상의 고온에서 고주파 융착되기 때문에 이를 급속냉각시키게 되면 용접으로 인한 응력발생이 방지되는 특징이 있다.Stainless steel has high-temperature fusion at 1800℃ or higher, so if it is rapidly cooled, it is characterized by preventing stress caused by welding.

제1차고주파용접기(131)에 의한 용접 후 용접된 부위를 제1냉각용 분사기(141)로 급속냉각 한다.After welding by the first high frequency welding machine 131, the welded portion is rapidly cooled with the first cooling injector 141.

1차 급속냉각으로 응력축적이 없는 용접부위에 제2고주파용접기(132)로 1차용접된 부위 외면을 용접한다.By the first rapid cooling, the outer surface of the first welded portion is welded with the second high frequency welding machine 132 to the welding portion without stress accumulation.

2차 고주판 용접 후 고온의 용접부위를 제2냉각용 분사기(142)에 의해 2차 급속 냉각시키는 것이다.After welding the second high-main plate, the high-temperature welding part is secondarily rapidly cooled by the second cooling injector 142.

본 실시예에서는 아르곤을 사용하였으며, 기타 냉각수, 질소 등이 사용될 수 있다.In this embodiment, argon is used, and other cooling water, nitrogen, and the like can be used.

본 실시예를 통하여 본 발명의 ERW식 제조방법에 의해 두께 2.0mm 정도 이상, 외경이 25.4mm 정도 이하까지도 정원이면서 표면이 고르게 형성된 고품질의 스텐파이프 제조를 확인할 수 있었다.Through this embodiment, it was confirmed by the ERW-type manufacturing method of the present invention that the production of high-quality stainless steel pipes having a thickness of about 2.0 mm or more and an outer diameter of about 25.4 mm or less while having an even surface is uniform.

본 발명의 구성은 상기 실시 예에 한정되는 것은 아니며, 통상의 기술범주에서 실시할 수 있는 다양한 실시예를 포함하는 것이다.The configuration of the present invention is not limited to the above embodiments, but includes various embodiments that can be carried out in a common technical category.

110:롤 111:스텐판재 115:롤러 116:말린부분 119:틈새 120:스텐파이프 131:제1고주파용접기 132:제2고주파용접기 141: 제1냉각용 분사기 142:제2냉각용분사기 161:절단기 170:인발기110: roll 111: stainless steel plate 115: roller 116: dried part 119: clearance 120: stainless pipe 131: first high frequency welding machine 132: second high frequency welding machine 141: first cooling sprayer 142: second cooling sprayer 161: cutting machine 170: drawer

Claims (1)

롤(110)에서 공급되는 소정 두께 및 폭의 스텐레스 판재를 롤러 사이로 통과시켜 가장자리에서부터 말아서 파이프를 형성하여 틈새를 고주파 전기저항 발열을 이용하는 고주파용접기에 의해 고주파 용접하여 스텐파이프를 제조하는 ERW 스텐파이프 제조방법에 있어서,

말린 파이프 틈새의 안쪽을 제1고주파용접기(131)에 의해 먼저 용접하는 단계,

제1고주파용접기(131)에 의한 용접부위를 1040℃이상에서 제1냉각용 분사기(141)에 의해 급속 냉각하는 단계,

제1고주파용접기(131)에 의해 용접된 부위의 틈새 바깥쪽을 제2고주파용접기(132)로 용접하는 단계,

제2고주파용접기(131)에 의한 용접부위를 1040℃이상에서 제2냉각용 분사기(141)에 의해 급속 냉각하는 단계,

ERW 방식에 의해 제조된 스텐파이프 인발기(170)를 통과시켜 단면적이 정원(正圓)인 스텐파이프를 형성하는 단계,를 포함하는 것을 특징으로 하는 ERW 스텐파이프 제조방법.ERW stainless steel pipe manufacturing is performed by high-frequency welding using a high-frequency welding machine using a high-frequency electric resistance heating to form a pipe by rolling a stainless steel plate having a predetermined thickness and width supplied from the roll 110 between rollers and rolling from the edge. In the way,

First welding the inside of the dried pipe gap by the first high frequency welding machine (131),

Rapid cooling of the welding area by the first high frequency welding machine (131) by the first cooling injector (141) at 1040°C or higher,

Welding the outside of the gap of the portion welded by the first high frequency welding machine 131 to the second high frequency welding machine 132,

Rapid cooling of the welding area by the second high frequency welding machine (131) by the second cooling sprayer (141) at 1040°C or higher,

A method of manufacturing an ERW stainless pipe, comprising passing through the stainless pipe extractor 170 manufactured by the ERW method to form a stainless pipe having a cross-sectional area.
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