KR20200062577A - Apparatus and method for manufacturing reinforcement ring - Google Patents

Apparatus and method for manufacturing reinforcement ring Download PDF

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KR20200062577A
KR20200062577A KR1020180148141A KR20180148141A KR20200062577A KR 20200062577 A KR20200062577 A KR 20200062577A KR 1020180148141 A KR1020180148141 A KR 1020180148141A KR 20180148141 A KR20180148141 A KR 20180148141A KR 20200062577 A KR20200062577 A KR 20200062577A
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bending
rolling
welding
cutting
ring
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KR1020180148141A
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Korean (ko)
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KR102299272B1 (en
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양동채
이재영
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(주)신라이노텍
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • 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
    • B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/28—Associations of cutting devices therewith
    • B21D43/285—Devices for handling elongated articles, e.g. bars, tubes or profiles
    • 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
    • B21D7/00—Bending rods, profiles, or tubes
    • B21D7/06—Bending rods, profiles, or tubes in press brakes or between rams and anvils or abutments; Pliers with forming dies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H1/00—Making articles shaped as bodies of revolution
    • B21H1/06—Making articles shaped as bodies of revolution rings of restricted axial length
    • 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
    • B23K9/0026—Arc welding or cutting specially adapted for particular articles or work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P17/00—Metal-working operations, not covered by a single other subclass or another group in this subclass
    • B23P17/02—Single metal-working processes; Machines or apparatus therefor
    • 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
    • B23K2101/30—Chains, hoops or rings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P2700/00—Indexing scheme relating to the articles being treated, e.g. manufactured, repaired, assembled, connected or other operations covered in the subgroups
    • B23P2700/50—Other automobile vehicle parts, i.e. manufactured in assembly lines

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Wire Processing (AREA)

Abstract

An object of the present invention is to provide an apparatus and a method capable of manufacturing a reinforcing ring through a cold method so as to reduce cost and processing time, and alleviate quality non-uniformity. The present invention provides an apparatus for manufacturing a reinforcing ring, which comprises: a bending device bending both ends of a bar-shaped material; a rolling device rolling the material bent in the bending device; a welding device jointly welding both ends of rolled material in the rolling device in a ring shape; and a turning device processing the outer periphery of welded ring-shaped material.

Description

보강링 제조 장치 및 제조 방법{APPARATUS AND METHOD FOR MANUFACTURING REINFORCEMENT RING}Reinforcing ring manufacturing apparatus and manufacturing method{APPARATUS AND METHOD FOR MANUFACTURING REINFORCEMENT RING}

본 발명은 차축용 보강링을 제조하는 보강링 제조 장치 및 제조 방법에 관한 것이다. The present invention relates to a reinforcing ring manufacturing apparatus and a manufacturing method for manufacturing a reinforcing ring for an axle.

도 1은 종래 기술에 따른 보강링을 보여주는 사진이다. 1 is a photograph showing a reinforcement ring according to the prior art.

보강링은 상용차의 차축에 들어가는 부품으로 거의 대부분의 상용차종에 조립되는 부품이다. 차축에 들어가서 차축을 보강해야 하는 부품인 만큼 제조 품질이 비교적 까다롭게 관리되는 부품이다. The reinforcing ring is a component that fits into the axle of a commercial vehicle and is a component that is assembled into almost all commercial vehicle models. As it is a part that needs to enter the axle and reinforce the axle, it is a part whose manufacturing quality is relatively difficult to manage.

종래에는 이 보강링은 원판에 홀을 가공하여 생산하였다. 그에 따라 소재의 손실이 컸고, 또한 가공 공정에서 열처리 등을 거치면서 변형이 생기는 경우가 많아 손실 비용이 컸다. Conventionally, this reinforcing ring was produced by processing a hole in a disk. As a result, the loss of the material was large, and the loss cost was high due to the occurrence of deformation during the heat treatment and the like in the processing process.

따라서, 보강링을 제조할 수 있는 새로운 장치의 개발이 요구되고 있다. Therefore, there is a need to develop a new device capable of manufacturing a reinforcing ring.

본 발명은 원가, 가공 시간을 절감하고, 품질의 불균일을 개선할 수 있도록 냉간 공법을 통해 보강링을 제조할 수 있는 장치 및 제조 방법을 제공하는 것을 목적으로 한다. An object of the present invention is to provide a device and a manufacturing method capable of manufacturing a reinforcing ring through a cold method so as to reduce cost, processing time, and improve quality non-uniformity.

본 발명은 바 형태의 소재의 양 단을 벤딩하는 벤딩 장치, 벤딩 장치에서 벤딩된 소재를 롤링하는 롤링 장치, 롤링 장치에서 롤링된 소재의 양단을 링 형으로 이음 용접하는 용접 장치 및 용접된 링 형의 소재 외주를 가공하는 선삭 장치를 포함하는 것을 특징으로 하는 보강링 제조 장치를 제공한다. The present invention is a bending device for bending both ends of a bar-shaped material, a rolling device for rolling a material bent in a bending device, a welding device for welding both ends of a rolled material in a rolling device to a ring type, and a welded ring type It provides a reinforcement ring manufacturing apparatus comprising a turning device for processing the outer periphery of the material.

또한 본 발명의 다른 일 예로, 용접을 용이하게 할 수 있도록 벤딩 장치에서 벤딩된 소재의 양 단을 컷팅하는 컷팅 장치를 더 포함하는 것을 특징으로 하는 보강링 제조 장치를 제공한다.In addition, as another example of the present invention, it provides a reinforcement ring manufacturing apparatus characterized in that it further comprises a cutting device for cutting both ends of the material bent in the bending device to facilitate welding.

또한 본 발명의 다른 일 예로, 벤딩 장치는, 소재의 양단을 지지하며 만곡부가 형성된 다이와 다이측으로 소재를 가압하는 펀치를 포함하는 것을 특징으로 하는 보강링 제조 장치를 제공한다. In addition, as another example of the present invention, the bending apparatus provides a reinforcement ring manufacturing apparatus characterized in that it includes a die for supporting both ends of the material and a punch for pressing the material toward the die side and a die formed with a curved portion.

본 발명은, 소재를 소정 길이로 절단하는 절단 단계, 절단된 소재의 양단부를 벤딩하는 벤딩 단계, 벤딩된 소재를 롤링하는 롤링 단계, 롤링된 소재의 양단부를 이음 용접하는 용접 단계 및 링 형상으로 가공된 소재를 선삭하는 선삭 단계를 포함하는 것을 특징으로 하는 보강링 제조 방법을 제공한다. The present invention is a cutting step of cutting the material to a predetermined length, a bending step of bending both ends of the cut material, a rolling step of rolling the bent material, a welding step of jointly welding both ends of the rolled material, and processing into a ring shape It provides a method for manufacturing a reinforcing ring, characterized in that it comprises a turning step for turning the material.

또한 본 발명은 벤딩 단계와 롤링 단계 사이에, 소재의 양단부를 용접이 용이하도록 커팅하는 커팅 단계를 더 포함하는 것을 특징으로 하는 보강링 제조 방법을 제공한다. In addition, the present invention provides a method of manufacturing a reinforcing ring between the bending step and the rolling step, further comprising a cutting step of cutting both ends of the material to facilitate welding.

본 발명은 보강링을 냉간 공법을 통한 유압 롤링 공법을 통해 생산함으로써, 원가나 가공시간을 절감할 수 있고, 품질의 불균일을 개선할 수 있다는 장점이 있다. The present invention has the advantage that it is possible to reduce the cost or processing time, and improve the quality non-uniformity, by producing a reinforcing ring through a hydraulic rolling method through a cold method.

도 1은 종래 기술에 따른 차축 보강링의 사진,
도 2는 본 발명의 일 실시예에 따른 보강링 제조 장치가 구비하는 벤딩 장치의 펀치를 도시한 도면,
도 3은 본 발명의 일 실시예에 따른 보강링 제조 장치가 구비하는 벤딩 장치의 다이를 도시한 도면,
도 4는 본 발명의 일 실시예에 따른 보강링 제조 장치가 구비하는 벤딩 장치의 단면도,
도 5는 본 발명의 일 실시예에 따른 보강링 제조 장치가 구비하는 커팅 장치의 펀치를 도시한 도면,
도 6은 본 발명의 일 실시예에 따른 보강링 제조 장치가 구비하는 커팅 장치의 다이를 도시한 도면,
도 7은 본 발명의 일 실시예에 따른 보강링 제조 장치가 구비하는 벤딩 장치의 단면도,
도 8은 본 발명의 일 실시예에 따른 보강링 제조 방법을 단계별로 도시한 도면이다. 1 is a photograph of an axle reinforcement ring according to the prior art,
2 is a view showing a punch of a bending device provided in the apparatus for manufacturing a reinforcing ring according to an embodiment of the present invention;
3 is a view showing a die of a bending device provided in the apparatus for manufacturing a reinforcing ring according to an embodiment of the present invention;
4 is a cross-sectional view of a bending device provided in a reinforcing ring manufacturing apparatus according to an embodiment of the present invention,
5 is a view showing a punch of a cutting device provided in the apparatus for manufacturing a reinforcing ring according to an embodiment of the present invention,
6 is a view showing a die of a cutting device provided in the apparatus for manufacturing a reinforcing ring according to an embodiment of the present invention;
7 is a cross-sectional view of a bending device provided in a reinforcing ring manufacturing apparatus according to an embodiment of the present invention,
8 is a view showing step by step a method of manufacturing a reinforcing ring according to an embodiment of the present invention.

이하, 도면을 참조하여 본 발명을 더욱 상세하게 설명한다. Hereinafter, the present invention will be described in more detail with reference to the drawings.

본 발명의 일 실시예에 따른 보강링 제조 장치는 소재를 소정 길이로 절단한다음, 절단된 소재의 양 단부를 롤링이 용이하도록 벤딩하고, 벤딩된 소재를 롤링하여 링 형상으로 성형한 다음, 링 형상으로 성형된 소재의 양 단부를 이음 용접한다. 그 다음, 성형이 완료된 소재의 내경, 두께 등을 선삭 가공하여 정밀하게 다듬는 과정을 거친다. The apparatus for manufacturing a reinforcing ring according to an embodiment of the present invention cuts a material into a predetermined length, then bends both ends of the cut material to facilitate rolling, and then rolls the bent material to form a ring, and then rings Both ends of the molded material are welded jointly. Then, the inner diameter, thickness, etc. of the material that has been molded are turned to undergo a precise trimming process.

도 2는 본 발명의 일 실시예에 따른 보강링 제조 장치가 구비하는 벤딩 장치의 펀치를 도시한 도면, 도 3은 본 발명의 일 실시예에 따른 보강링 제조 장치가 구비하는 벤딩 장치의 다이를 도시한 도면, 도 4는 본 발명의 일 실시예에 따른 보강링 제조 장치가 구비하는 벤딩 장치의 단면도이다. 2 is a view showing a punch of a bending device provided in a reinforcing ring manufacturing apparatus according to an embodiment of the present invention, and FIG. 3 is a die of a bending device provided in a reinforcing ring manufacturing apparatus according to an embodiment of the present invention. 4 is a cross-sectional view of a bending device provided in a reinforcing ring manufacturing apparatus according to an embodiment of the present invention.

소정 길이로 절단된 소재는 벤딩 장치로 투입되어, 양 단부가 벤딩된다. 벤딩 장치의 펀치(100)는 플레이트(110)에 하부로 돌출 형성되며, 소재를 가압하는 벤딩 펀치(120)와, 소재의 중앙부의 변형을 방지하기 위한 지지부(130)를 포함한다. 또 양단부에 후술할 슬라이드 로드(240)가 삽입되어 펀치(100)의 승, 하강을 안내하는 슬라이드 홀(140)이 형성된다. The material cut into a predetermined length is put into a bending device, and both ends are bent. The punch 100 of the bending device is formed to protrude downward from the plate 110, and includes a bending punch 120 that presses the material and a support 130 to prevent deformation of the central portion of the material. In addition, slide rods 240, which will be described later, are inserted at both ends to form slide holes 140 that guide the up and down of the punch 100.

벤딩 장치의 다이(200)는 플레이트(210) 상에 상부로 돌출 형성되는 벤딩 다이(220)와 소재의 중앙부의 변형을 방지하기 위한 지지부(230)를 포함한다. 벤딩 다이(220)와 지지부(230)는 벤딩 시에 소재(M)가 끼워져 고정될 수 있도록 홈(222, 232)이 형성되어 있다. 다이(200)의 양 단부에는 슬라이드 홀(140)에 끼워져 펀치(100)의 승하강을 안내하는 슬라이드 로드(240)가 설치된다. The die 200 of the bending device includes a bending die 220 protruding upward on the plate 210 and a support 230 for preventing deformation of the central portion of the material. The bending die 220 and the support 230 are formed with grooves 222 and 232 so that the material M is fitted and fixed when bending. Slide rods 240 are installed at both ends of the die 200 to be inserted into the slide hole 140 to guide the up and down of the punch 100.

도 5는 본 발명의 일 실시예에 따른 보강링 제조 장치가 구비하는 커팅 장치의 펀치를 도시한 도면, 도 6은 본 발명의 일 실시예에 따른 보강링 제조 장치가 구비하는 커팅 장치의 다이를 도시한 도면, 도 7은 본 발명의 일 실시예에 따른 보강링 제조 장치가 구비하는 벤딩 장치의 단면도이다. 5 is a view showing a punch of a cutting device provided in a reinforcing ring manufacturing apparatus according to an embodiment of the present invention, and FIG. 6 is a die of a cutting device provided in a reinforcing ring manufacturing apparatus according to an embodiment of the present invention 7 is a cross-sectional view of a bending device provided in a reinforcing ring manufacturing apparatus according to an embodiment of the present invention.

커팅 장치의 펀치(300)는 플레이트(310)에 슬라이드 홀(330)과 커팅 펀치(340)가 설치된 커팅부(320)가 설치된다. The punch 300 of the cutting device is provided with a cutting portion 320 in which a slide hole 330 and a cutting punch 340 are installed on a plate 310.

커팅 장치의 다이(400)는 플레이트(410)에 소재(M)가 올려지는 다이날부(420)가 장착된다. 다이날부(420)에는 소재(430)를 고정하기 위한 고정 스트리퍼(430)가 설치되며, 커팅 펀치(340)가 이동하며 삽입되는 커팅홈(440)이 형성된다. 펀치(300)가 하강하면, 커팅 펀치(340)가 고정 스트리퍼(430)에 의해 고정된 소재(M)를 가압하며 커팅홈(440)과 커팅 펀치(340)의 모서리에 의해 소재(M)의 끝부분이 커팅된다.The die 400 of the cutting device is mounted on the plate 410 where the material M is placed. A fixed stripper 430 for fixing the material 430 is installed in the die portion 420, and a cutting groove 440 through which the cutting punch 340 is moved is formed. When the punch 300 is lowered, the cutting punch 340 presses the material (M) fixed by the fixing stripper 430 and the cutting groove 440 and the cutting punch 340 by the edges of the material (M) The end is cut.

소재(M)의 끝부분이 커팅되면 소재(M)가 롤링 장치에서 롤링 되어 링 형상으로 형성되었을 때, 양단부가 서로 간섭이나 갭이 없이 최대한 밀착될 수 있어 용접으로 이음하기 용이하다는 장점이 있다. When the end of the material (M) is cut, when the material (M) is rolled in a rolling device and formed into a ring shape, both ends can be closely adhered to each other without interference or gaps, and thus there is an advantage of being easy to join by welding.

도 8은 본 발명의 일 실시예에 따른 보강링 제조 방법을 단계별로 도시한 도면이다. 8 is a view showing step by step a method of manufacturing a reinforcing ring according to an embodiment of the present invention.

먼저 기다린 바 형태의 소재를 소정 길이로 절단한다. 이때 소재는 열처리 등이 이미 가해진 것으로, 성형 후 열처리 하는 것에 비해 변형이 적어 불량률을 낮출 수 있다. 적당한 길이로 절단된 소재는 벤딩 장치에 투입되어 양 단부의 벤딩이 이루어진다. 그 다음 양 단부의 이음 용접을 용이하게 할 수 있도록 소재의 컷팅이 이루어진다. 컷팅된 소재는 롤링 장치에 투입되어 링 형상으로 롤링된다. 이때 롤링 장치는 종래의 롤링 장치를 이용할 수 있다. 롤링된 소재는 양단이 이음 용접된다. 이때, 소재의 양단이 이미 컷팅되었기 때문에 시작점과 종단점 사이의 단차가 생기지 않아 용접 조건이 최적화되어 용접이 용이하고 불량률을 낮출 수 있다. 용접은 CO2 용접 등을 이용할 수 있다. First, the bar-shaped material is cut into a predetermined length. At this time, the material has already been subjected to heat treatment and the like, and thus has less deformation compared to heat treatment after molding, thereby lowering the defect rate. The material cut to a suitable length is put into a bending device to bend at both ends. The material is then cut to facilitate seam welding at both ends. The cut material is put into a rolling device and rolled in a ring shape. At this time, the rolling device may use a conventional rolling device. The rolled material is welded at both ends. At this time, since both ends of the material have already been cut, there is no step between the start point and the end point, and the welding conditions are optimized to facilitate welding and lower the defect rate. For welding, CO 2 welding or the like can be used.

용접이 완료된 링은 상대물과 조립될 때 틈새 및 용접성이 용이하도록 면(두께) 가공이나 내경을 선삭 가공할 수 있다. 용접까지의 가공링 생산 공정이 평탄도, 진원도를 맞추기에 최적화되어 있으므로 선삭 가공량을 최소화할 수 있고, 외경 가공이 불필요해지며, 그에 따라 가공 시간을 단축시킬 수 있다. When the welded ring is assembled with a counterpart, it can be machined with a surface (thickness) or an inner diameter to facilitate clearance and weldability. Since the manufacturing process of the processing ring until welding is optimized to match the flatness and roundness, turning amount can be minimized, outer diameter machining becomes unnecessary, and the machining time can be shortened accordingly.

Claims (5)

바 형태의 소재의 양 단을 벤딩하는 벤딩 장치;
벤딩 장치에서 벤딩된 소재를 롤링하는 롤링 장치;
롤링 장치에서 롤링된 소재의 양단을 링 형으로 이음 용접하는 용접 장치; 및
용접된 링 형의 소재 외주를 가공하는 선삭 장치;를 포함하는 것을 특징으로 하는 보강링 제조 장치.A bending device for bending both ends of the bar-shaped material;
Rolling device for rolling the material bent in the bending device;
A welding device for jointly welding both ends of the rolled material in a rolling device in a ring type; And
Reinforcing ring manufacturing apparatus comprising a; turning device for processing the outer circumference of the welded ring-shaped material. 제1항에 있어서,
용접을 용이하게 할 수 있도록 벤딩 장치에서 벤딩된 소재의 양 단을 컷팅하는 컷팅 장치;를 더 포함하는 것을 특징으로 하는 보강링 제조 장치.According to claim 1,
Reinforcing ring manufacturing apparatus further comprising; a cutting device for cutting both ends of the material bent in the bending device to facilitate welding. 제1항에 있어서,
벤딩 장치는, 소재의 양단을 지지하며 만곡부가 형성된 다이와 다이측으로 소재를 가압하는 펀치를 포함하는 것을 특징으로 하는 보강링 제조 장치. According to claim 1,
Bending device, reinforcement ring manufacturing apparatus, characterized in that it comprises a punch for pressing the material to the die side and the die side curved portion is formed to support both ends of the material. 소재를 소정 길이로 절단하는 절단 단계;
절단된 소재의 양단부를 벤딩하는 벤딩 단계;
벤딩된 소재를 롤링하는 롤링 단계;
롤링된 소재의 양단부를 이음 용접하는 용접 단계; 및
링 형상으로 가공된 소재를 선삭하는 선삭 단계;를 포함하는 것을 특징으로 하는 보강링 제조 방법. A cutting step of cutting the material to a predetermined length;
A bending step of bending both ends of the cut material;
A rolling step of rolling the bent material;
A welding step of jointly welding both ends of the rolled material; And
A method of manufacturing a reinforcing ring, comprising: a turning step of turning a material processed into a ring shape. 제4항에 있어서,
벤딩 단계와 롤링 단계 사이에, 소재의 양단부를 용접이 용이하도록 커팅하는 커팅 단계;를 더 포함하는 것을 특징으로 하는 보강링 제조 방법.
The method of claim 4,
Between the bending step and the rolling step, a cutting step of cutting both ends of the material to facilitate welding; further comprising a reinforcement ring manufacturing method.
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20050009304A (en) * 2003-07-16 2005-01-25 김장호 Width bending machine
KR100858864B1 (en) * 2007-12-28 2008-09-17 하나로테크 주식회사 The swring plate manufacture method and the goods
KR20120019919A (en) * 2010-08-27 2012-03-07 하나로테크 주식회사 Swing ring plate manufacturing device and method using it
KR20130070368A (en) * 2011-12-19 2013-06-27 주식회사 성우하이텍 Bending device
JP2016087633A (en) * 2014-10-31 2016-05-23 三菱重工業株式会社 Manufacturing method for cylindrical member

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20050009304A (en) * 2003-07-16 2005-01-25 김장호 Width bending machine
KR100858864B1 (en) * 2007-12-28 2008-09-17 하나로테크 주식회사 The swring plate manufacture method and the goods
KR20120019919A (en) * 2010-08-27 2012-03-07 하나로테크 주식회사 Swing ring plate manufacturing device and method using it
KR20130070368A (en) * 2011-12-19 2013-06-27 주식회사 성우하이텍 Bending device
JP2016087633A (en) * 2014-10-31 2016-05-23 三菱重工業株式会社 Manufacturing method for cylindrical member

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