KR970025771A - Method for manufacturing toric shell structure by diameter contraction method - Google Patents
Method for manufacturing toric shell structure by diameter contraction method Download PDFInfo
- 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
- Authority
- KR
- South Korea
- Prior art keywords
- diameter
- shell structure
- expanding
- toric
- circumference
- Prior art date
Links
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
Landscapes
- 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
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)
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 |
Family
ID=19434613
Family Applications (1)
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 |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR0142609B1 (en) |
Families Citing this family (1)
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 |
-
1995
- 1995-11-18 KR KR1019950042140A patent/KR0142609B1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
KR0142609B1 (en) | 1998-08-17 |
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