KR950012391B1 - Method and apparatus for manufacturing a steel tube - Google Patents

Method and apparatus for manufacturing a steel tube Download PDF

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Publication number
KR950012391B1
KR950012391B1 KR1019930011461A KR930011461A KR950012391B1 KR 950012391 B1 KR950012391 B1 KR 950012391B1 KR 1019930011461 A KR1019930011461 A KR 1019930011461A KR 930011461 A KR930011461 A KR 930011461A KR 950012391 B1 KR950012391 B1 KR 950012391B1
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South Korea
Prior art keywords
die
upper die
mold
steel plate
steel pipe
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KR1019930011461A
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Korean (ko)
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KR950000254A (en
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배병태
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배병태
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Priority to KR1019930011461A priority Critical patent/KR950012391B1/en
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Publication of KR950012391B1 publication Critical patent/KR950012391B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K21/00—Making hollow articles not covered by a single preceding sub-group
    • 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

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)

Abstract

cutting a steel plate(1) to a regular size; forming the cut steel plate(1) to dish a shape in a press(2) having a lower die(24) and an upper die(21); forming the dish shaped steel plate to a U-shape after installing a pair of supporters(3) operated by an oil hydraulic cylinder(30) and supporting the steel plate(1); forming the U-shaped steel plate to a round shape to change the dies; and welding both ends in touch with each other. The method enhances the productibity of the steel tube, and minimizes the loss of the steel plate.

Description

두께가 두꺼운 강관의 제조방법 및 그 장치Manufacturing method of thick steel pipe and device

제1도는 종래의 제조 공정도.1 is a conventional manufacturing process diagram.

제2도는 본 발명의 제조 공정도.2 is a manufacturing process diagram of the present invention.

제3도는 본 발명의 강관 제조장치를 보인 실시예시도.Figure 3 is an embodiment showing the steel pipe manufacturing apparatus of the present invention.

제4a, b, c, d, e, f, g도는 본 발명의 강관 제조장치의 작동상태도.4a, b, c, d, e, f, g is an operating state of the steel pipe manufacturing apparatus of the present invention.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

1 : 강판 2 : 프레스기1 steel sheet 2 press machine

3 : 지지대 3' : 만곡부3: support 3 ': curved portion

20 : 승강 프레임 21, 22, 23 : 상부다이20: lifting frame 21, 22, 23: upper die

24, 25 : 하부다이 30 : 유압 실린더24, 25: lower die 30: hydraulic cylinder

본 발명은 두께가 두꺼운 강관의 제조방법 및 그 장치에 관한 것이다.The present invention relates to a method for manufacturing a thick steel pipe and an apparatus thereof.

종래에는 특수한 용도에 사용하기 위한 두께가 10mm 이상인 강관의 제작시 제1도에 도시된 바와 같이 여유부(c)를 감안하여 절단된 강판(a)에 일정간격으로 다수의 접힘부(b)를 형성하고 접힘부(b)를 원하는 곡률을 갖도록 일일이 접은 후 여유부(c)를 제거한 후 원형으로 말린 강판(a)의 양끝을 마주대고 용접하였기 때문에 제조공정이 복잡하여 생산성이 저하되고, 여유부(c)를 절단해내야 하기 때문에 자재의 낭비가 클 뿐만 아니라 강관의 내면에 다수의 접힘부(b) 흔적이 그대로 남게되어 관손실이 커지는 등의 폐단이 있었다.Conventionally, when manufacturing a steel pipe having a thickness of 10 mm or more for use in a special application, as shown in FIG. 1, a plurality of folded portions b are arranged at regular intervals on a cut sheet c in consideration of the allowable portion c. After forming and folding the folded portion (b) one by one to have the desired curvature, after removing the margin portion (c) and welding both ends of the steel sheet (a) rolled in a circular shape, the manufacturing process is complicated and productivity is lowered. Because of cutting (c), waste of materials was not only large, but also a large number of folds (b) were left on the inner surface of the steel pipe, resulting in a large pipe loss.

본 발명은 이와 같은 점을 감안하여 단일의 프레스 장치에서 다이를 교환해주는 것만으로 두께가 10mm 이상인 강관을 연속 공정에 의해 제작할 수 있게 한 것이다.In view of the above, the present invention allows a steel pipe having a thickness of 10 mm or more to be manufactured by a continuous process only by replacing the die in a single press device.

본 발명의 다른 목적은 강관 제작에 필요했던 여유부(c)를 고려할 필요가 없게 함으로서 원자재비를 절감할 수 있을 뿐만 아니라 연속 공정에 의한 강관 제조를 가능하게 하여 생산성을 향상시키기 위한 것이다.Another object of the present invention is to reduce the raw material cost by not having to consider the margin (c) required for the production of the steel pipe, as well as to improve the productivity by enabling the production of steel pipe by a continuous process.

본 발명의 또다른 목적은 내면에 접힘부(b)가 형성되지 않고 전원에 가까운 강관을 용이하게 제작할 수 있게 함으로써 관손실을 극소화 시키기 위한 것이다.Another object of the present invention is to minimize the tube loss by allowing the steel pipe close to the power source to be easily manufactured without the folded portion (b) formed on the inner surface.

이하 본 발명의 바람직한 실시예를 첨부 도면에 의거 상세히 설명하면 다음과 같다.BEST MODE Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

제2도는 본 발명의 제조공정도로서, 적당한 크기로 절단된 강판(1)을형 상부다이(21)와형 하부다이 (24)가 설치된 프레스기(2)에서형으로 성형하고, 유압실린더(30)에 의해 작동되는 한쌍의 지지대(3)에형 강판(1)을 지지되도록 설치하여형 상부다이(22)와형 하부다이(25)에 의해 U형으로 성형하고,형 상부다이(22)를형 상부다이(23)로 교환하여 강판(1)을 원형으로 성형한 후 마주닿는 양끝단을 용접하여서 된 것이다.2 is a manufacturing process diagram of the present invention, the steel sheet 1 cut to a suitable size With the upper die (21) In the press machine 2 with the mold lower die 24 installed To a pair of supports 3 which are molded into a mold and operated by a hydraulic cylinder 30. To support the steel plate (1) With the upper die (22) By the mold lower die 25, Mold upper die (22) This is done by replacing the mold upper die 23, forming the steel sheet 1 in a circular shape, and then welding the opposite ends.

상기 프레스기(2)의 프레스 압은 최대 2500톤 정도가 바람직하며 공정에 따라 상·하부 다이를 교체하여 사용되는 것으로 프레스기(2)는 제3도에 도시된 바와같다.The press pressure of the press machine 2 is preferably about 2500 tons at a maximum, and the press machine 2 is used by replacing upper and lower dies according to a process, as shown in FIG.

즉 유압에 의해 승하강하는 승강프레임(20)과 승강 프레임(20)에 장탈착되는 상부다이(21)(22)(23)와 프레스기(2)의 하부에 설치되어 유압실린더(30)에 의해 좌우로 이동하고 상부에 만곡부(3')가 형성된 한쌍의 지지대(3)와 상기 지지대(3) 사이에 장탈착되는 하부다이(24)(25)로 구성된 것이다.That is, the hydraulic die 30 is installed at the lower part of the upper die 21, 22, 23 and the press machine 2 which are mounted on the lifting frame 20 and the lifting frame 20 which are lifted up and down by hydraulic pressure. It is composed of a pair of supports (3) and the lower die (24, 25) that is demountable between the support (3) is moved to the left and right and the curved portion (3 ') is formed on the top.

상기 상부다이(21)(22)(23)는 강관의 제조공정에 따라 교체하여 사용을 것으로 (21)은형태를 갖는 다이이고, (22)는형태를 갖는 다이이며, (23)은형태를 갖는 다이로 되어 있으며, 하부다이(24)(25)는 각각형태와형태로 되어 있는 것으로 상기 프레스기(2)에서 강관을 성형하는 과정은 아래와 같다.The upper dies 21, 22, 23 will be used according to the manufacturing process of the steel pipe to be used (21) Die having a shape, and Die having a shape, and 23 is Die having a shape, and the lower dies 24 and 25 are respectively Form and The process of forming the steel pipe in the press machine 2 is in the form as follows.

프레스기(2)에형 상부다이(21)와형 하부다이(24)를 설치하고형 하부다이(24)에 강판(1)을 놓은 상태에서 제4b도에 도시된 바와 같이 유압에 의해 승강프레임(20)을 하강시키면 짝을 이루는형 상부다이(21)와형 하부다이(24)에 의해 강판(1)이형태로 절곡된다.On press machine (2) With the upper die (21) Install the type lower die (24) With the steel plate 1 placed on the mold lower die 24, the lifting frame 20 is lowered by hydraulic pressure as shown in FIG. With the upper die (21) The steel sheet 1 is formed by the die lower die 24. Bent into shape.

상기 승강프레임(20)을 상승시켜형 상부다이(21)와형 하부다이(24)를 제4c도에 도시된 바와 같이형 상부다이(22)와형 하부다이(25)로 각각 교체 설치하고형으로 1차 성형된 강판(1)을 한쌍의 지지대(3) 사이에 협지되도록 설치한 후 승강프레임(20)을 하강시키게 되면형 강판(1) 이형 상부다이(22)의 압입력에 의해 제4d도에 도시된 바와 같이 U자 형태로 구부려지게 되는데 지지대(3)는 유압 실린더(30)에 의해형 아부다이(22)가 강판(1)을 누르는 것과 동시에 강판(1)을 양측에서 눌러주는 것으로 강판(1)이 U자형으로 성형된후 제4e도에 도시된 바와 같이형 상부다이(22)를 상승시키고 유압실린더(30)를 계속 작동시켜주게 되면 강판(1)의 양끝단이 만곡부(3')에 의해 내향 굴곡성형된다. 이렇게 된 상태에서 제4도 f, g에 도시된 바와 같이형 상부다이(22)를형 상부다이(23)로 교체하고 승강프레임(20)을 하강시키게 되면 U형으로 성형된 강판(1)이형 상부다이(23)의 곡면을 따라 구부러져 원형 형상을 갖게되는 것으로 마주 닿은 강판(1)이 양끝단을 용접하게 되면 원하는 강관이 제작되는 것이다.Raising the lifting frame 20 With the upper die (21) Mold lower die 24 as shown in FIG. With the upper die (22) Each with a lower die (25) When the steel sheet 1 molded into a mold is installed to be sandwiched between a pair of supports 3 and then the lifting frame 20 is lowered. Type steel plate (1) As shown in FIG. 4d, the upper die 22 is bent in a U-shape as shown in FIG. 4D. The support 3 is formed by the hydraulic cylinder 30. As the type Abu die 22 presses the steel sheet 1 and simultaneously presses the steel sheet 1 from both sides, the steel sheet 1 is formed into a U shape, as shown in FIG. 4E. When the mold upper die 22 is raised and the hydraulic cylinder 30 is continuously operated, both ends of the steel sheet 1 are bent inwardly by the curved portion 3 '. In this state, as shown in FIG. 4, f, g Mold upper die (22) When the upper die 23 is replaced and the lifting frame 20 is lowered, the steel sheet 1 formed in the U shape is The steel sheet 1, which is bent along a curved surface of the mold upper die 23 to have a circular shape, is welded at both ends to produce a desired steel pipe.

상기 상·하부 다이의 만곡부 지름은 제작하려고 하는 강관의 지름에 따라 선택하여 사용하여야 한다.The bend diameter of the upper and lower dies should be selected and used according to the diameter of the steel pipe to be manufactured.

이와 같이 본 발명은 단일의 프레스기(1)에 상·하부 다이를 교환해주는 일련의 공정에 의하여 강관을 연속적으로 제조할 수 있게 함으로써 원자재비를 절감하고 생산성을 향상시킬 수 있을 뿐만 아니라 내면이 매끄러운 강관을 용이하게 제작함으로써 관 손실을 극소화시킬 수 있는 강관의 제조방법 및 그 장치에 관한 것이다.As described above, the present invention enables the continuous manufacture of steel pipes by a series of processes for exchanging upper and lower dies in a single press machine 1, thereby reducing raw material costs and improving productivity, as well as providing a smooth inner pipe. The present invention relates to a method for manufacturing a steel pipe and an apparatus thereof, which can minimize tube loss by easily manufacturing.

Claims (3)

적당한 크기로 절단된 강판(1)을형 상부다이(21)와형 하부다이(24)가 설치된 프레스기(2)에서형으로 성형하고, 유압실린더(30)에 의해 작동되는 한쌍의 지지대(3)에형 강판(1)을 지지되도록 설치하여형 상부다이(22)와형 하부다이(25)에 의해 U형으로 성형하고형 상부다이(22)를형 상부다이(23)로 교환하여 강판(1)을 원형으로 성형한 후 마주닿는 양끝단을 용접하여서 된 두께가 두꺼운 강관의 제조방법.The steel sheet (1) cut to a suitable size With the upper die (21) In the press machine 2 with the mold lower die 24 installed To a pair of supports 3 which are molded into a mold and operated by a hydraulic cylinder 30. To support the steel plate (1) With the upper die (22) By the die bottom die 25 Mold upper die (22) A method for producing a thick steel pipe, which is formed by replacing the upper die (23) to form a steel sheet (1) in a circular shape and then welding the opposite ends. 유압에 의해 승하강하는 승강프레임(20)과 승강프레임(20)에 장탈착되는 상부다이(21)(22)(23)와 프레스기(2)의 하부에 설치되어 유압실린더(30)에 의해 좌우로 이동되고 상부에 만곡부(3')가 형성된 한쌍의 지지대(3)가 상기 지지대(3) 사이에 장탈착되는 하부다이(24)(25)로 구성된 두께가 두꺼운 강관의 제조장치.It is installed at the lower part of the upper die 21, 22, 23 and the press machine 2 which are mounted on the lifting frame 20 and the lifting frame 20, which are lifted up and down by hydraulic pressure. And a pair of supports (3) having a curved portion (3 ') formed in the upper portion of the lower die (24, 25) is mounted between the support (3) of the thick steel pipe manufacturing apparatus. 제2항에 있어서, 상부다이(21)(22)(23)가형,형,형으로 각각 형성되고 하부다이(24)(25)가형,형으로 각각 형성된 두께가 두꺼운 강관의 제조장치.3. The upper die (21) (22) (23) of claim 2, brother, brother, And each of the lower dies 24 and 25 brother, Apparatus for producing thick steel pipes each formed in a mold.
KR1019930011461A 1993-06-23 1993-06-23 Method and apparatus for manufacturing a steel tube KR950012391B1 (en)

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KR1019930011461A KR950012391B1 (en) 1993-06-23 1993-06-23 Method and apparatus for manufacturing a steel tube

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Application Number Priority Date Filing Date Title
KR1019930011461A KR950012391B1 (en) 1993-06-23 1993-06-23 Method and apparatus for manufacturing a steel tube

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KR950012391B1 true KR950012391B1 (en) 1995-10-17

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101348239B1 (en) * 2012-03-23 2014-01-09 서광기연 주식회사 Expandable pipe forming bending machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101348239B1 (en) * 2012-03-23 2014-01-09 서광기연 주식회사 Expandable pipe forming bending machine

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