KR20020069528A - The welding equipment and method for build up on the round surface of work roll - Google Patents
The welding equipment and method for build up on the round surface of work roll Download PDFInfo
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- KR20020069528A KR20020069528A KR1020010009566A KR20010009566A KR20020069528A KR 20020069528 A KR20020069528 A KR 20020069528A KR 1020010009566 A KR1020010009566 A KR 1020010009566A KR 20010009566 A KR20010009566 A KR 20010009566A KR 20020069528 A KR20020069528 A KR 20020069528A
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- 238000003466 welding Methods 0.000 title claims abstract description 103
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000010438 heat treatment Methods 0.000 claims abstract description 24
- 230000007547 defect Effects 0.000 claims abstract description 19
- 238000003754 machining Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 4
- 229910001209 Low-carbon steel Inorganic materials 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 230000032258 transport Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 239000010960 cold rolled steel Substances 0.000 abstract description 3
- 229910000831 Steel Inorganic materials 0.000 abstract description 2
- 238000009395 breeding Methods 0.000 abstract description 2
- 230000001488 breeding effect Effects 0.000 abstract description 2
- 238000005242 forging Methods 0.000 abstract description 2
- 239000010959 steel Substances 0.000 abstract description 2
- 238000005096 rolling process Methods 0.000 abstract 1
- 239000011324 bead Substances 0.000 description 3
- 230000004907 flux Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 229910001234 light alloy Inorganic materials 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007730 finishing process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000007778 shielded metal arc welding Methods 0.000 description 1
- 238000010897 surface acoustic wave method Methods 0.000 description 1
Classifications
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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
- B23K9/04—Welding for other purposes than joining, e.g. built-up welding
- B23K9/044—Built-up welding on three-dimensional surfaces
- B23K9/046—Built-up welding on three-dimensional surfaces on surfaces of revolution
- B23K9/048—Built-up welding on three-dimensional surfaces on surfaces of revolution on cylindrical surfaces
-
- 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
-
- 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
- B23K2101/00—Articles made by soldering, welding or cutting
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
Abstract
본 발명은 냉연강판 제조에 사용되는 워크롤(W)의 육성용접이 가능하도록 잠호용접(SAW：Submerged Arc Welding) 방법을 이용하여 상기 워크롤의 저널부(100)를 자동으로 용접하는 장치 및 작업방법에 관한 것으로서, 상세히는 용융 풀 흘러내림 방지기능과 전진법 용접이 가능하도록 하는 기울이는 방식의 용접헤드(3a)를 장착한 용접장치(1)와; 워크롤을 회전시키고 회전중 밀림을 방지하기 위한 구동장치(2)와; Ø140 이상의 워크롤 저널부의 외면 원주부를 스파이럴(Spiral) 방식으로 용접하는 용접헤드(3a)를 이송시키는 이송장치(3)와; 100℃ 내외에서 예열 및 후열의 수행이 가능한 열처리 장치(4); 및 상기 장치들에 의해 용접결함의 발생을 방지하도록 이루어지는 작업방법에 관한 것이다.The present invention is an apparatus and operation for automatically welding the journal portion 100 of the work roll using a submerged arc welding (SAW) method to enable the growth welding of the work roll (W) used in the production of cold rolled steel sheet The method relates to a welding device (1) equipped with an inclined welding head (3a), which is capable of preventing molten pool downflow and forward welding. A driving device (2) for rotating the work roll and preventing rolling during rotation; A conveying apparatus 3 for conveying a welding head 3a for welding the outer circumferential portion of the work roll journal of Ø140 or more in a spiral manner; A heat treatment apparatus 4 capable of performing preheating and postheating at about 100 ° C; And a work method made by the devices to prevent the occurrence of welding defects.
이러한 육성 용접장치 및 작업방법은 워크롤(W) 저널부(100)의 육성용접이 결함없이 자동으로 가능하게 되어, 상기 워크롤을 제작할 때 발생되는 저널부의 가공결함 문제를 해결할 수 있게 되며, 또한 장기간 사용한 워크롤을 재생하는 재경화(Re-hardening) 육성, 로타(Rotor) 등의 단조강 보수에도 활용이 가능하다.This breeding welding device and work method is possible to automatically weld the work roll (W) journal portion 100 without a defect, it is possible to solve the problem of processing defects in the journal portion produced when manufacturing the work roll, and It can be used for re-hardening to regenerate the used work roll for a long time and forging steel repair such as Rotor.
Description
본 발명은 냉연강판 제조에 사용되는 워크롤 표면의 육성 용접장치 및 작업방법에 관한 것으로서, 상세히는 상기 워크롤을 제작할 때 발생하는 저널부의 가공결함 또는 사용하고 난 후 마모된 표면을 보수하기 위해서, 기울이는 방식의 용접헤드와, 상기 용접헤드의 이송장치와, 워크롤의 밀림 방지를 위한 구동장치와, 예·후열을 수행하는 열처리 장치로 구성되는 육성 용접장치 및 상기 장치들에 의해 실시되는 육성용접 방법에 관한 것이다.The present invention relates to a welding apparatus and a work method for the growth of the work roll surface used in the production of cold rolled steel sheet, in detail, in order to repair the defective surface or the worn surface after use of the journal portion generated when manufacturing the work roll, A welding welding apparatus comprising a tilting welding head, a feeding device of the welding head, a driving device for preventing the roll of the work roll, a heat treatment device for performing post-heating, and a welding welding performed by the above devices. It is about a method.
냉연강판 제조에 사용되는 원통 형상의 워크롤(W)은 도 1에 도시한 바와 같이, 저널부(100)인 양측부와 중간부인 배럴부(200)로 구성되며, 냉연강판을 제조하기 위해서 상기 저널부(100)를 축으로 하여 워크롤(W)을 회전시킴과 동시에 상기 배럴부(200)가 열강판을 압착하도록 되어 있다.As shown in FIG. 1, the cylindrical work roll (W) used in cold rolled steel sheet manufacturing is composed of both side portions, which are journal portions 100, and barrel portions 200, which are intermediate portions. The barrel portion 200 is pressed against the hot steel plate while rotating the work roll W with the journal portion 100 as the axis.
이러한 상기 워크롤은 일반적으로 3Cr, 5Cr, 3Cr-1Ni 합금과 함께 고탄소를 함유한 재질로 이루어져 고강도 및 고경도를 갖고 있으며, 용해로→인고트→가열로→단조작업(Forging)→풀림(Annealing)→황삭가공→담금질→정삭가공→연마→검사를 거쳐 출하하는 과정으로 제작된다.The work roll is generally made of a material containing high carbon together with 3Cr, 5Cr, 3Cr-1Ni alloy has a high strength and high hardness, melting furnace → ingot → heating furnace → forging → annealing ) It is produced by roughing, quenching, finishing, polishing, and inspection.
그런데 특히, 상기 워크롤의 저널부는 베어링과 커플링(Coupling) 및 키-웨이(Key-Way) 등이 부착되는 부분으로 정밀한 치수가 요구되기 때문에, 제작과정에서 고정밀 가공이 요구되나, 가공형상이 복잡하여 거의 마지막 공정인 정삭가공 공정에서 종종 상기 저널부의 치수결함 및 가공결함이 발생하고 있다.By the way, in particular, the journal portion of the work roll is a portion to which the bearing, coupling (Coupling), Key-Way (attach) is attached, so the precise dimensions are required, high precision machining is required in the manufacturing process, but the processing shape is In the finishing process, which is complicated and almost the last process, dimensional defects and machining defects often occur in the journal portion.
이와 같이, 워크롤 제작과정에서 발생되는 저널부의 치수결함 또는 표면 부위에 대한 가공결함은 보수가 불가능하여 처음의 공정 즉, 완제품을 용해로에 넣어 워크롤의 제작과정을 처음부터 다시 수행해야 하므로, 결론적으로 보면 치수결함 및 가공결함으로 인해 워크롤을 폐기해야 되는 심각한 문제를 야기하게 되는데, 이러한 문제를 해결하기 위한 방안으로서 워크롤 저널부의 표면 부위에 일종의 덧씌우기인 육성용접을 실시하여 상기 저널부를 보수하는 방법이 있다.As such, the dimensional defects or the processing defects on the surface portion of the journal part generated during the work roll manufacturing process cannot be repaired, and thus, the work process of the work roll production must be performed again from the beginning. In view of the above, dimensional defects and processing defects cause serious problems that require the disposal of the work roll. As a way to solve the problem, the journal part may be repaired by fostering welding, which is a kind of overlay on the surface part of the work roll journal part. There is a way.
그러나, 워크롤은 재질의 경화능이 매우 높고, 워크롤 표면이 Hs40∼50의 고경도를 가지며, 표면 경화온도가 140℃ 정도에서 이루어지기 때문에 워크롤의 열관리 조건이 매우 까다로워 용접결함이 쉽게 발생한다. 따라서, 이러한 용접결함으로 워크롤의 보수가 매우 어려워 상기한 바와 같이, 가공불량이 발생하면 워크롤을 전량 폐기하고 있다.However, since the work roll has a very high hardenability of the material, the work roll surface has a high hardness of Hs40-50, and the surface hardening temperature is about 140 ° C., the thermal management conditions of the work roll are very difficult, so that welding defects are easily generated. . Therefore, the repair of the work roll is very difficult due to such welding defects, and as described above, when the machining defect occurs, the whole work roll is discarded.
따라서, 개선된 육성용접을 수행하기 위한 관련 장치 및 작업방법의 발명은 워크롤을 제작할 때 발생되는 가공결함에 대한 보수 뿐만 아니라, 장기간 사용후 마모된 제품의 재경화 육성에도 활용이 가능하다.Therefore, the invention of the related apparatus and working method for performing the improved fusing welding can be utilized not only for repairing the processing defects generated when manufacturing the work roll, but also for fostering the re-hardening of the worn products after long-term use.
워크롤 육성용접은 수동에 의한 SMAW, FCAW 방법이 가능하나, 이러한 용접법은 스패터(Spatter) 발생에 의해 용접부 주변의 정삭 가공부의 손상과 용접부에 결함을 자주 유발하며, 수동으로 작업이 수행됨에 따라 작업능률이 매우 떨어지는 문제로 인하여 실제 워크롤 육성용접의 적용에는 적합하지 않다.Work roll fusing welding can be done by manual SMAW and FCAW methods.However, this welding method frequently causes damages to the finished parts around the welds and defects due to spatter, and as the work is performed manually, Due to the very poor work efficiency, it is not suitable for the actual work roll raising welding.
본 발명은 상기한 바와 같이 종래 워크롤 육성용접의 문제점을 개선하기 위해 안출된 것으로서, 육성 용접장치는 잠호용접(SAW：Submerged Arc Welding) 방법의 DCRP가 전원으로 적용되며, 용융 풀이 흘러내리지 않도록 플럭스 관을 사용하고, 용입을 최소화하여 용접결함을 방지하도록 용접헤드를 10∼20°기울이도록 하며, 이송장치는 스파이럴(Spiral) 용접이 가능하도록 구동장치의 회전중에 용접 비드폭만큼 움직이도록 하고, 열처리 장치는 용접 전·후 100℃ 정도에서 60시간 이상 열처리가 가능하도록 한다.The present invention has been devised to improve the problems of conventional work roll fusing welding as described above, the fusing welding device is applied to DCRP of submerged arc welding (SAW) method as a power source, the flux so that the melt pool does not flow down Use a pipe, tilt the welding head 10 ~ 20 ° to minimize welding and prevent welding defects, and transfer device to move the welding bead width during the rotation of the driving device to enable spiral welding, and heat treatment The device allows heat treatment for 60 hours or more at 100 ° C before and after welding.
작업방법으로는 워크롤 가공, 1차 예열, 2차 예열, 육성용접 그리고 열처리로에서 후열하는 방법으로 작업을 진행한다.Work methods include work roll processing, primary preheating, secondary preheating, fusing welding, and post-heating in a heat treatment furnace.
도 1은 일반적인 워크롤의 정면 개략도,1 is a front schematic view of a general work roll,
도 2는 본 발명에 따른 워크롤의 육성 용접장치의 개략도,2 is a schematic view of the welding apparatus for raising the work roll according to the present invention;
도 3의 (a)는 본 발명에 따른 용접헤드 이송장치의 정면도이고, (b)는 그 측면도,Figure 3 (a) is a front view of the welding head feed apparatus according to the present invention, (b) is a side view thereof,
도 4는 본 발명에 따른 워크롤 열처리 장치의 개략도,4 is a schematic view of a work roll heat treatment apparatus according to the present invention,
도 5는 본 발명에 따른 워크롤 외면의 육성 용접방법의 구성도이다.5 is a block diagram of a growth welding method of the outer surface of the work roll according to the present invention.
(도면 부호의 설명)(Explanation of reference numerals)
1...용접장치, 2....구동장치,1 ... welding device, 2 .... driving device,
3...이송장치, 4...열처리 장치,3 ... transfer unit, 4 ... heat treatment unit,
5...이동용 바퀴, 6...베이스 구조,5 ... mobile wheels, 6 ... base structure,
7,7'...지지대, 8...핸들,7,7 '... support, 8 ... handle,
9...볼 스크류, 10...헤드 가이드,9 ... ball screw, 10 ... head guide,
11...용접장치 부착판, 12...모터,11 ... welding plate, 12 ... motor,
13...조(Jaw), W...워크롤.13 Jaw, W ... workroll.
이하, 첨부된 도면을 참조하여 본 발명에 따른 워크롤 외면의 육성 용접장치 및 작업방법에 대한 구성을 상세히 설명한다.Hereinafter, with reference to the accompanying drawings will be described in detail the configuration of the welding apparatus for raising the work surface and the working method according to the present invention.
워크롤 외면의 육성용접을 수행하기 위하여, Ø140 이상인 워크롤 저널부의 외면 원주부를 스파이럴 방법으로 용접함으로써 용접부의 건전성 확보가 가능한 용접방법이 요구된다. 이러한 육성용접을 수행하기 위해서는 도 2 및 도 3에 도시한 바와 같이, 개선된 용접장치(1), 구동장치(2), 이송장치(3), 열처리 장치(4) 및 작업방법이 선행되어야 한다.In order to perform the welding welding of the outer surface of the work roll, a welding method capable of securing the integrity of the welded portion is required by welding the outer circumferential portion of the work roll journal portion having a diameter of φ140 or more by a spiral method. 2 and 3, the improved welding apparatus 1, the driving apparatus 2, the conveying apparatus 3, the heat treatment apparatus 4, and the working method must be preceded in order to perform such breeding welding. .
즉, 용접장치(1)는 잠호용접(Submerged Arc Welding)을 수행하기 위한 DCRP 용접전원과 외경 육성용접이 가능한 용접헤드(3a)가 사용되고, 상기 용접헤드(3a)는 워크롤 외경 육성용접이 가능하도록 플럭스 관을 사용하여 용융 풀의 흘러내림을 방지하는 기능과, 전진법에 의한 용입 깊이를 최소화하여 용접결함을 방지하도록 용접헤드(3a)를 10∼20°기울이는 기능을 가지도록 한다.That is, the welding apparatus 1 uses a DCRP welding power source for performing submerged arc welding and a welding head 3a capable of external diameter growth welding, and the welding head 3a is capable of welding a work roll outer diameter. The flux tube is used to prevent the melt pool from flowing down, and the welding head 3a is tilted by 10 to 20 degrees to prevent welding defects by minimizing penetration depth by the forward method.
구동장치(2)는 서로 마주보도록 배치되는 4개의 터닝롤러(2a)를 사용하여 이 터닝롤러(2a)의 사이에 워크롤(W)의 배럴부(200)의 외면 원주부가 밀착되어 상기 워크롤(W)을 회전시키게 되며, 상기 워크롤(W)의 일단에 설치된 스토퍼(2b)에 의해 회전중 워크롤(W)의 밀림을 방지하게 된다.The driving device 2 uses four turning rollers 2a disposed to face each other so that the outer circumferential portion of the barrel portion 200 of the work roll W is brought into close contact between the turning rollers 2a. It is to rotate (W), it is to prevent the roll of the work roll (W) during the rotation by the stopper (2b) provided on one end of the work roll (W).
이송장치(3)는 용접헤드(3a)가 설치된 용접장치(1)를 용접장치 부착판(11)에 부착하여 좌우로 이송하는 역할을 수행하면서 스파이럴(Sprial) 용접이 가능하도록 구동장치(2)의 회전중에 상기 용접헤드(3a)를 용접 비드폭만큼 제어반으로 제어하여 움직이도록 하는 장치이다.The transfer device 3 attaches the welding device 1 on which the welding head 3a is installed to the welding device attachment plate 11 to transfer the welding device 1 to the left and right while driving the spiral device 2 so as to enable spiral welding. The welding head 3a is controlled by the control panel by the welding bead width during the rotation of the apparatus.
상기 이송장치(3)의 보다 상세한 구성은 도 3의 (a)와 (b)에 도시한 바와 같이, 이동용 바퀴(5)가 달린 베이스 구조(6) 위에 서로 마주보는 지지대(7)(7')를 세우되, 상기 각각의 지지대(7)(7')에는 조(Jaw)(13)에 의해 고정되는 볼 스크류(9)를 설치하고, 지지대(7)(7') 사이를 가로질러 상기 볼 스크류(9)에 연결된 헤드 가이드(10)를 설치하며, 상기 헤드 가이드(10)에는 상기한 용접장치 부착판(11)이 결합되고, 지지대(7)(7') 상단부에 설치되어 볼 스크류(9)에 연결된 핸들(8)의 작동에 의해 헤드 가이드(10)가 상기 볼 스크류(9)를 타고 오르내리게 되어 있다. 또한, 상기 이송장치의 일측에 설치된 모터(12)는 이송장치의 작동을 제어하는 제어반과 케이블 선으로 연결되어 있다.More detailed configuration of the transfer device 3 is shown in (a) and (b) of Figure 3, the support (7) (7 ') facing each other on the base structure (6) with the wheel (5) for movement ), Each of the support (7) (7 ') is provided with a ball screw (9) which is fixed by a jaw (13), and across the support (7) (7') The head guide 10 connected to the ball screw 9 is installed, and the welding device attachment plate 11 is coupled to the head guide 10, and the ball screw is installed at the upper end of the support 7, 7 ′. The operation of the handle 8 connected to 9 causes the head guide 10 to move up and down the ball screw 9. In addition, the motor 12 installed on one side of the transfer device is connected to the control panel for controlling the operation of the transfer device by a cable line.
이와 같이 구성되는 이송장치(3)는 용접장치(1)와 연결하여 워크롤 용접작업의 원점과 끝점 위치에서 센서기능에 의해 용접을 자동 정지하도록 하고, 구동장치의 회전중에 용접헤드를 분당 최소 3㎜ 속도로 이송시켜, 워크롤의 외면에 스파이럴 용접이 가능하게 하며, 프로그램에 의한 자동제어방법으로 위치 및 속도 설정기능을 갖고 있다.The conveying apparatus 3 configured as described above is connected to the welding apparatus 1 so as to automatically stop welding by the sensor function at the origin and end positions of the work roll welding operation, and at least 3 welding heads per minute during the rotation of the driving apparatus. It is conveyed at the speed of ㎜, enables spiral welding on the outer surface of the work roll, and has the function of setting the position and speed by the automatic control method by the program.
또, 이송장치의 주변기능으로는 제품의 높이에 따라 용접헤드의 위치 셋팅이 용이하도록 좌·우측 볼 스크류에 핸들을 부착하여 상하로 움직이도록 하고, 상하로 이송할 때 좌·우측 위치 차이에 따른 움직임이 원활하도록 하며, 작업 전·후에 있어서 제품을 이동할 때 용접헤드와 간섭이 발생하지 않도록 바퀴가 설치되어 이동이 가능하도록 한다. 또, 작업중 플럭스 보충이 용이하도록 장치의 배면에 발판을 제작하는 방식으로 하며, 용접헤드 설치로 무게중심이 앞으로 쏠려 넘어지지 않도록 베이스 구조가 앞쪽으로 많이 나오게 한다.In addition, as a peripheral function of the conveying device, the handle is attached to the left and right ball screw to move up and down so that the position of the welding head can be easily set according to the height of the product. The movement is smooth, and the wheels are installed so that the movement of the product before and after work does not interfere with the welding head. In addition, the step of making a scaffold on the back of the device to facilitate the replenishment of the flux during the operation, and the base structure to the front so that the center of gravity does not fall forward by the installation of the welding head.
열처리 장치(4)는 워크롤의 용접 전·후에 상기 워크롤의 예·후열을 수행하는 장치(도 4 참조)로서, 그 크기는 워크롤 전 제품의 장입이 가능하도록 6000×1000×1200㎜의 크기로 하며, 박스 내부에는 좌·우측에 10㎾ 용량의 히터를 2개 설치하고, 자동으로 온도조절이 되도록 열전대와 콘트롤러를 사용하며, 벽면에는 보온재를 충진하여 외부로 열발산을 최소화 하도록 한다.The heat treatment apparatus 4 is an apparatus (see FIG. 4) for performing pre- and post-heating of the work roll before and after welding of the work roll, the size of which is 6000 × 1000 × 1200 mm to enable the loading of the product before the work roll. It is sized, and inside the box, two heaters of 10㎾ capacity are installed on the left and right sides, and thermocouples and controllers are used to automatically control the temperature, and the wall surface is filled with insulation to minimize heat dissipation to the outside.
본 발명의 작업방법을 설명하면 다음과 같다.Referring to the working method of the present invention.
1) 워크롤 저널부의 육성용접을 하기 전에 상기 저널부가 일정한 깊이를 갖도록 가공한다.1) The journal section is processed to have a constant depth before the welding of the work roll journal section.
이는 가공불량이 3㎜ 이하로 발생하는 경우에만 수행하는 작업절차이다. 즉, 워크롤 저널부의 육성용접을 하게 되면 용접비드의 높이가 초층의 연강 용접부위에서 2㎜, 2층의 경합금 용착부에서 2㎜ 쌓이므로, 경합금 용착부가 보수후 제품 표면에 나오도록 하기 위해서는 상기 워크롤 저널부의 가공깊이가 3㎜ 이상이 되도록 추가로 가공해야 한다.This is a work procedure to be performed only when a machining defect occurs below 3 mm. That is, when the welding of the work roll journal part is performed, the height of the welding bead is 2 mm at the first layer of mild steel welding and 2 mm at the light alloy welding layer of the second layer, so that the light alloy welding part appears on the surface of the product after repair. Further machining should be carried out so that the depth of the roll journal is 3 mm or more.
2) 워크롤을 열처리 장치에 장입하여 100℃로 48시간 이상 1차 예열한다.2) Charge the work roll into the heat treatment equipment and preheat it to 100 ° C for at least 48 hours.
3) 워크롤을 열처리 장치에서 꺼내 예열토치를 이용하여 용접할 위치를 국부적으로 250∼300℃로 2차 예열한다.3) The work roll is taken out of the heat treatment apparatus and the preheating torch is locally preheated to 250 to 300 ° C. secondly.
4) 잠호용접(SAW) 방법으로 워크롤 저널부의 초층을 연강 용접재료로 밑깔기하며, 2층은 경합금(Hard Facing)으로 용접하되, 도 5에 도시한 바와 같이, Ø140 이상의 워크롤(W)에 적용하며, 진행방향은 저널부의 끝단부에서 중심부 측으로 진행하고, 용접헤드(3a)는 전진법이 되도록 기울여 용접한다.4) The first layer of the work roll journal part is laid with a mild steel welding material by the SAW method, and the second layer is welded with a hard alloy, but as shown in FIG. 5, the work roll W having a diameter of 140 or more. The direction of travel proceeds from the end of the journal portion to the center side, and the welding head 3a is inclined to weld forward.
5) 육성용접이 완료된 워크롤을 열처리 장치에 장입하여 100℃로 60시간 후열한다.5) Charge the finished work roll into the heat treatment device and heat it up at 100 ℃ for 60 hours.
6) 열처리 후 육성용접된 저널부를 치수에 맞도록 정삭가공한다.6) Finish the welded journal part after heat treatment to fit the dimensions.
본 발명에 따른 워크롤 외면의 육성 용접장치 및 작업방법에 의하면, 워크롤을 제작할 때 발생되는 가공결함에 대한 보수가 가능하게 됨에 따라 제품 폐기를 방지할 수 있으며, 또한 장기간 사용한 제품을 재생하는 재경화(Re-hardening) 육성도 가능하다.According to the welding apparatus and the working method of the outer surface of the work roll according to the present invention, it is possible to prevent the disposal of the product by repairing the processing defects generated during the production of the work roll, and also to recycle the product used for a long time. Re-hardening can also be fostered.
Claims (4)
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101009613B1 (en) * | 2009-09-28 | 2011-01-21 | 박헌 | Power on / off device for electronic products interlocking with light switch using wireless communication |
| CN105935831A (en) * | 2016-05-31 | 2016-09-14 | 铜陵正前机械装备制造有限公司 | Automatic welding device for crossed rods |
| CN106077892A (en) * | 2016-08-10 | 2016-11-09 | 宣化钢铁集团有限责任公司 | A kind of surfacing equipment of repaired roller |
| CN106181095A (en) * | 2016-08-30 | 2016-12-07 | 江苏汇能锅炉有限公司 | High stability automatization straight tube butt welding machine for boiler |
| CN106216816A (en) * | 2016-09-28 | 2016-12-14 | 无锡奇能焊接系统有限公司 | Full-automatic LPG steel cylinder Welding machine of circumferential weld with visual tracking device |
| CN108971899A (en) * | 2018-08-10 | 2018-12-11 | 广西柳钢工程技术有限公司 | The overlaying method and deflection welding tooling of roll mill roller |
| CN111703082A (en) * | 2020-05-29 | 2020-09-25 | 泉州市汉威机械制造有限公司 | A pull-up pants hot welding knife roller mechanism |
| CN112958872A (en) * | 2021-02-05 | 2021-06-15 | 安徽马钢设备检修有限公司 | Auxiliary device for welding flat uncoiler mandrel baffle disc fracture and welding process |
| KR102310787B1 (en) | 2020-08-20 | 2021-10-08 | 탐코리아 주식회사 | Overlay welding apparatus |
| KR102451401B1 (en) * | 2021-04-13 | 2022-10-06 | 주식회사 희람테크 | Hardfacing welding apparatus for extruder screw |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108971899A (en) * | 2018-08-10 | 2018-12-11 | 广西柳钢工程技术有限公司 | The overlaying method and deflection welding tooling of roll mill roller |
| CN108971899B (en) * | 2018-08-10 | 2020-08-14 | 广西柳钢工程技术有限公司 | Build-up welding method and deflection welding tool for vertical grinding roller |
| CN111703082A (en) * | 2020-05-29 | 2020-09-25 | 泉州市汉威机械制造有限公司 | A pull-up pants hot welding knife roller mechanism |
| KR102310787B1 (en) | 2020-08-20 | 2021-10-08 | 탐코리아 주식회사 | Overlay welding apparatus |
| CN112958872A (en) * | 2021-02-05 | 2021-06-15 | 安徽马钢设备检修有限公司 | Auxiliary device for welding flat uncoiler mandrel baffle disc fracture and welding process |
| CN112958872B (en) * | 2021-02-05 | 2022-05-27 | 安徽马钢设备检修有限公司 | Fracture welding process for core shaft baffle disc of leveling uncoiler |
| KR102451401B1 (en) * | 2021-04-13 | 2022-10-06 | 주식회사 희람테크 | Hardfacing welding apparatus for extruder screw |
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