KR970025771A - Method for manufacturing toric shell structure by diameter contraction method - Google Patents

Method for manufacturing toric shell structure by diameter contraction method Download PDF

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Publication number
KR970025771A
KR970025771A KR1019950042140A KR19950042140A KR970025771A KR 970025771 A KR970025771 A KR 970025771A KR 1019950042140 A KR1019950042140 A KR 1019950042140A KR 19950042140 A KR19950042140 A KR 19950042140A KR 970025771 A KR970025771 A KR 970025771A
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KR
South Korea
Prior art keywords
diameter
shell structure
expanding
toric
circumference
Prior art date
Application number
KR1019950042140A
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Korean (ko)
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KR0142609B1 (en
Inventor
김동권
김영득
정환술
Original Assignee
이수강
한국중공업 주식회사
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Publication date
Application filed by 이수강, 한국중공업 주식회사 filed Critical 이수강
Priority to KR1019950042140A priority Critical patent/KR0142609B1/en
Publication of KR970025771A publication Critical patent/KR970025771A/en
Application granted granted Critical
Publication of KR0142609B1 publication Critical patent/KR0142609B1/en

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Classifications

    • 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
    • B21K21/08—Shaping hollow articles with different cross-section in longitudinal direction, e.g. nozzles, spark-plugs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/02—Die forging; Trimming by making use of special dies ; Punching during forging
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
    • B21J5/12—Forming profiles on internal or external surfaces

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)

Abstract

본 발명은 원자력 압력용기, 석유화학 압력용기등의 대형 발전기기 및 산업기기에 널리 쓰이는 원환체 쉘 구조물의 제조방법에 관한 것으로, 구체적으로는 작업물(1)을 일정한 크기의 환봉 형상으로 단련하여 최종 치수에 맞추어 절단하는 1단계; 누르기 작업 및 중심부 천공작업을 하고 천공된 작업물(1)의 구멍에 굴대(2)를 삽입하여 원환체 쉘의 최종 길이만큼 길이방향으로 연신하여 중공 환봉 상태로 단조작업하는 2단계; 직경확장법에 의해 직경확장작업을 진행함과 동시에 직경확장용 금형(5)의 상부에 반달형 봉을 취부하여 작업물의 원주상에 홈이 성형되도록 하는 3단계 및 작업물(1)의 축방향이 지면과 수직이 되게 놓고 직경수축용금형(6)을 이용하여 원주상에 있는 홈의 노치효과에 의해 홈 부위를 기점으로 직경이 수축되도록 성형기에 의해 누르기 작업하는 4단계를 순차진행함을 특징으로 하는 직경수축법에 의한 원환체 쉘 구조물의 제조방법을 제공하는 것이며, 본 발명 방법은 원환체의 쉘 구조물의 직선부와 곡선부의 길이비율에 따른 성형곤란성 및 내·외경부 가공여유 불균일에 따른 기계 가공비의 과다지출에 의한 비경제성을 제거할 수 있고 최종 요구치수를 정확하게 만족시킬 수 있는 이점을 갖는다.The present invention relates to a method of manufacturing a torus shell structure widely used in large generators such as nuclear pressure vessels, petrochemical pressure vessels, and industrial equipment, and specifically, the workpiece 1 is annealed to a round bar shape having a constant size. 1 step of cutting to the final dimension; Pressing and working in the center of the core and inserting the mandrel 2 into the hole of the perforated workpiece 1 to extend longitudinally by the final length of the toric shell to forge the hollow round bar; The third step and the axial direction of the work piece 1 are carried out so that the grooves are formed on the circumference of the work piece by attaching a half-moon-shaped rod on the upper part of the diameter-expanding mold 5 while the diameter expanding work is performed by the diameter expanding method. It is placed perpendicular to the ground and using the diameter shrinkage mold (6) to perform the four steps of pressing operation by the molding machine so that the diameter shrinks from the groove part by the notch effect of the groove on the circumference. The present invention provides a method for manufacturing a toric shell structure by a diameter contraction method, and the present invention provides a machine according to molding difficulty according to the length ratio of straight portions and curved portions of a shell structure of a toric body and non-uniform working margins of inner and outer diameter parts. It is possible to eliminate the inefficiency caused by the overexpenditure of the processing cost and to accurately meet the final requirements.

Description

직경수축법에 의한 원환체 쉘 구조물의 제조방법Method for manufacturing toric shell structure by diameter contraction method

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제1도는 종래의 직경확장법에 의한 원환체 쉘 구조물 제조방법의 수행순서도,1 is a flow chart of a method of manufacturing a toric shell structure by a conventional diameter expansion method,

제2도는 본 발명의 직경수축법에 의한 원환체 쉘 구조물의 제조방법의 수행 순서도,2 is a flow chart of the production method of the toric shell structure by the diameter contraction method of the present invention,

제3도는 본 발명 실시예에 의해 제조된 원환체 쉘 구조물의 일부 단면 개략도이다.3 is a partial cross-sectional schematic view of the toric shell structure produced by an embodiment of the present invention.

Claims (1)

작업물(1)을 일정한 크기의 환봉 형상으로 단련하여 최종 치수에 맞추어 절단하는 1단계; 누르기 작업 및 중심부 천공작업을 하고 천공된 작업물(1)의 구멍에 굴대(2)를 삽입하여 원환체 쉘의 최종 길이만큼 길이방향으로 연신하여 중공 환봉 상태로 단조작업하는 2단계; 직경확장법에 의해 직경확장작업을 진행함과 동시에 직경확장용 금형(5)의 상부에 반달형 봉을 취부하여 작업물의 원주상에 홈이 성형되도록 하는 3단계 및 작업물(1)의 축방향이 지면과 수직이 되게 놓고 직경수축용금형(6)을 이용하여 원주상에 있는 홈의 노치 효과에 의해 홈 부위를 기점으로 직경이 수축되도록 성형기에 의해 누르기 작업하는 4단계를 순차진행함을 특징으로 하는 직경수축법에 의한 원환체 쉘 구조물의 제조방법.1 step of cutting the workpiece (1) to the final dimensions by the annealed to a round bar shape of a predetermined size; Pressing and working in the center of the core and inserting the mandrel 2 into the hole of the perforated workpiece 1 to extend longitudinally by the final length of the toric shell to forge the hollow round bar; The third step and the axial direction of the work piece 1 are carried out so that the grooves are formed on the circumference of the work piece by attaching a half-moon-shaped rod on the upper part of the diameter-expanding mold 5 while the diameter expanding work is performed by the diameter expanding method. It is placed perpendicular to the ground and using the diameter shrinkage mold (6) to perform the four steps of pressing by the molding machine so that the diameter shrinks from the groove part by the notch effect of the groove on the circumference. A method for producing a toric shell structure by a diameter contraction method. ※ 참고사항:최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950042140A 1995-11-18 1995-11-18 Shell structure making method by the diameter contraction method KR0142609B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950042140A KR0142609B1 (en) 1995-11-18 1995-11-18 Shell structure making method by the diameter contraction method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950042140A KR0142609B1 (en) 1995-11-18 1995-11-18 Shell structure making method by the diameter contraction method

Publications (2)

Publication Number Publication Date
KR970025771A true KR970025771A (en) 1997-06-24
KR0142609B1 KR0142609B1 (en) 1998-08-17

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Application Number Title Priority Date Filing Date
KR1019950042140A KR0142609B1 (en) 1995-11-18 1995-11-18 Shell structure making method by the diameter contraction method

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101309274B1 (en) * 2013-06-17 2013-09-16 주식회사 신일 Molding device for making excavator yoke by multistage forging

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KR0142609B1 (en) 1998-08-17

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