KR950001190B1 - Elbow manufacturing method - Google Patents

Elbow manufacturing method Download PDF

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Publication number
KR950001190B1
KR950001190B1 KR1019920014944A KR920014944A KR950001190B1 KR 950001190 B1 KR950001190 B1 KR 950001190B1 KR 1019920014944 A KR1019920014944 A KR 1019920014944A KR 920014944 A KR920014944 A KR 920014944A KR 950001190 B1 KR950001190 B1 KR 950001190B1
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KR
South Korea
Prior art keywords
mandrel
elbow
piston rod
tube
cut
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Application number
KR1019920014944A
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Korean (ko)
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KR940003637A (en
Inventor
안갑원
Original Assignee
주식회사 성광벤드
안갑원
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Priority to KR1019920014944A priority Critical patent/KR950001190B1/en
Publication of KR940003637A publication Critical patent/KR940003637A/en
Application granted granted Critical
Publication of KR950001190B1 publication Critical patent/KR950001190B1/en

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21KMAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00Making machine elements
    • B21K1/14Making machine elements fittings
    • B21K1/16Making machine elements fittings parts of pipe or hose couplings

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

Abstract

The method manufactures the elbow for preventing its end parts from distorting caused by inner/outer temperature difference or a piston rod push force irrespective of the thickness. The method comprises a step of inserting 1-2 mm carbon steel pipe (3) into a cut workpiece (2A); a step of covering a lubricant on the inner face of the thin steel pipe (3) and the surface of a mandrel (1); a step of inserting a distortion prevention ring (4) into contacts between the workpieces (2A); a step of discharging the inserted steel pipe (3) out of the mandrel (1) by use of a press plate (6) of the piston rod (5).

Description

엘보의 제조방법Manufacturing method of elbow

제1a, b, c, d도는 본 발명의 제조공정도.1a, b, c, d is a manufacturing process diagram of the present invention.

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

1 : 맨드릴(MANDREL) 2 : 엘보(ELBOW)1: MANDREL 2: ELBOW

2A : 소재 3 : 박관(薄管)2A: Material 3: Pipe

3A : 할절부 4 : 변형방지링3A: Section 4: Strain Relief Ring

5 : 피스톤로드 6 : 압판5: piston rod 6: platen

본 발명은 엘보의 제조방법에 관한 것으로서, 엘보의 제조는, 긴 스테인레스관을 일정한 길이로 절단한 소재를 맨드릴(MANDREL)에 여러개 끼워 히터로 가열하면서 실린더의 피스톤로드로 밀어서 엘보의 곡형과 동일곡형으로 된 맨드릴의 단부를 통과, 배출시켜 제조하게 되는 바, 종래에는 상기와 같이 일정한 길이로 절단한 소재를 맨드릴에 단순히 끼워 피스톤로드로 밀어 제조하게 되므로 맨드릴에 끼워진 소재가 피스톤로드에 밀려 맨드릴면을 따라 슬라이더될 때 소재내면과 맨드릴과의 접촉저항에 의하여 발생되는 고온의 마찰력에 의하여 소재내면에 긁힘이나 흠집이 발생하게 되고, 또한 두께가 얇은 소재로 엘보를 제조시에는 맨드릴면에 접촉된 소재의 내부온도와 소재의 외부의 온도차이와 피스톤로드에 의하여 강하게 밀리는 압력에 의해 맨드릴에 끼워져 서로 접촉된 각 소재의 끝단부위가 찌그러지게 됨으로 인하여 불량품이 많이 발생하게 되어 제조원가의 상승요인이 되었으며, 특히 두께가 매우 얇은 스테인레스 소재(S/5S, S/10S)로서는 엘보의 제조가 거의 불가능하였다.The present invention relates to a method of manufacturing elbows, the production of elbows, the same type of curved elbows by pushing the piston rod of the cylinder while heating the heater by inserting a plurality of materials cut into a long length of stainless steel pipe to a mandrel (MANDREL) It is manufactured by passing through the end of the mandrel made of a bar, and conventionally, the material cut to a certain length as described above is simply inserted into the mandrel to be manufactured by pushing the piston rod, so the material inserted in the mandrel is pushed on the piston rod to As a result of the high temperature frictional force generated by the contact resistance between the inner surface of the material and the mandrel when it is slidered, scratches or scratches are generated on the inner surface of the material. The difference between the internal temperature and the external temperature of the material and the pressure pushed strongly by the piston rod Due to the distorted end of each material inserted into the reel, a lot of defective products are generated, which is an increase factor of manufacturing cost. Especially, the production of elbow is very thin for stainless steel material (S / 5S, S / 10S). It was almost impossible.

본 발명은 상기와 같은 문제점을 해소시킬 수 있도록 하기 위하여 일정한 길이로 절단한 소재 내부에 박관을 끼워서 맨드릴에 소재를 끼울시 상기 박관에 의하여 소재가 맨드릴에 직접 접촉되지 않도록 하여 소재의 내면과 고온의 맨드릴과의 마찰력에 의하여 긁힘이나 흠집이 발생되지 않도록 함과 아울러 또한 맨드릴에 여러개 끼워진 각 소재의 접촉부분의 외측에는 변형방지링을 끼우므로서 소재의 내,외온도의 차이와 실린더의 피스톤로드의 미는 압력에도 소재의 끝단부위가 찌그러지는 것을 방지할 수 있도록 하여 두께가 얇은 소재에 구애받음없이 매우 양호한 엘보를 제조할 수 있도록 한 엘보의 제조방법을 발명하게 된 것인데, 본 발명을 첨부도면에 의하여 상세히 설명하면 다음과 같다.The present invention is to insert the material into the mandrel by cutting the inside of the material cut to a certain length in order to solve the above problems so that the material is not in direct contact with the mandrel by the tube to the material of the inner surface and high temperature The frictional force with the mandrel prevents scratches and scratches, and the deformation prevention ring is fitted on the outer side of the contact portion of each material inserted into the mandrel. In order to prevent the end portion of the material to be crushed under the pushing pressure to invent a manufacturing method of the elbow to produce a very good elbow regardless of the thin material, the present invention by the accompanying drawings It will be described in detail as follows.

긴 스테인레스관을 일정한 길이로 절단한 소재(2A)를 맨드릴(1)에 여러개 끼워서 실린더의 피스톤로드(5)에 고정한 압판(6)으로 밀어 엘보의 곡형과 동일 곡형으로 된 맨드릴(1)의 단부를 통과 배출시켜 엘보(2)를 제조하는 공지의 방법에 있어서, 일정한 길이로 절단한 소재(2A)의 내부에 카본스틸(CARBON STEEL)로 되고 할절부(3A)를 형성한 1-2mm의 박관(3)을 제1도(a)와 같이 삽입하여 박관(3)의 내면과 맨드릴(1)의 표면에 윤활제를 칠하여 박관(3)이 맨드릴(1)를 따라 잘 미끄러지도록 여러개를 끼워서 각 소재(2A)가 서로 접촉되는 접촉부분에는 소재(2A)의 단부가 찌그러지는 것을 방지하기 위한 일정폭과 두께로 된 변형방지링(4)을 제1도(b)와 같이 끼운후, 피스톤로드(5)의 압판(6)으로 밀어 맨드릴(1)의 외부로 배출시킨다음 제1도(d)와 같이 박관(3)을 빼어 제거시켜 엘보(2)를 제조함을 특징으로 한 것이다.The end of the mandrel 1, which is made of the same shape as that of the elbow, is pushed onto the platen 6 secured to the piston rod 5 of the cylinder by inserting several pieces of material 2A cut in a long length into a mandrel 1. In the known method of manufacturing the elbow 2 by discharging it through, a 1-2 mm thin tube made of CARBON STEEL and having a cut section 3A formed inside the material 2A cut to a constant length. Insert (3) as shown in FIG. 1 (a) to lubricate the inner surface of the tube 3 and the surface of the mandrel 1 so that the tube 3 slides well along the mandrel 1 and insert each of them. At the contact portion where 2A is in contact with each other, the deformation preventing ring 4 having a predetermined width and thickness for preventing the end of the material 2A from being crushed is inserted as shown in FIG. Push the platen 6 of 5) and discharge it to the outside of the mandrel 1, and then remove and remove the thin tube 3 as shown in FIG. Is characterized by the production of a beam (2).

이와 같이 된 본 발명은 일정한 길이로 절단한 소재(2A)의 내에 박관(3)을 끼워서 박관(3)의 내면과 맨드릴(1)에 윤활제를 칠하여 잘 미끄러지도록 여러개 끼운후 각 소재(2A)가 접촉되는 접촉부분에는 변형방지링(4)을 끼운 다음 피스톤로드(5)의 압판(6)으로 밀어 제조하게 되므로 엘보(2) 내면에 굵힘현상과 끝단부의 찌그러지는 현상을 완전 제거시킬 수 있게 되어 매우 양질의 엘보(2)를 제조할 수 있는 것이다.According to the present invention as described above, by inserting the thin tube 3 into the material 2A cut to a certain length and lubricating the inner surface of the tube 3 and the mandrel 1 so as to slide well, and then each material 2A Since the contact portion is in contact with the deformation preventing ring (4) by inserting the pressure plate (6) of the piston rod (5) is manufactured to be able to completely eliminate the phenomena of the thickening and the end of the end of the elbow (2) It is possible to produce a very good quality elbow (2).

이에 따라 상품가치를 향상시킬 수 있을 뿐만 아니라, 특히 본 발명에 의하여 제조시에는 소재(2A)의 두께에 구애받음없이 엘보(2)를 제조할 수 있어 소재(2A)의 선택이 자유롭게 불량품이 거의 발생되지 않아 불량품으로 인한 재료의 허실을 방지할 수 있게되어 생산비를 대폭 절감시킬 수 있는 효과가 있다.As a result, not only the product value can be improved, but also the elbow 2 can be manufactured regardless of the thickness of the material 2A during manufacturing according to the present invention, so that the selection of the material 2A is almost free. It is possible to prevent the loss of materials due to defective products is not generated there is an effect that can significantly reduce the production cost.

Claims (1)

긴 스테인레스관을 일정한 길이로 절단한 소재(2A)를 맨드릴(1)에 여러개 끼워서 실린더의 피스톤로드(5)에 고정한 압판(6)으로 밀어 엘보의 곡형과 동일 곡형으로 된 맨드릴(1)의 단부를 통과 배출시켜 엘보(2)를 제조하는 공지의 방법에 있어서, 일정한 길이로 절단한 소재(2A)의 내부에 카본스틸로 되고 할절부(3A)를 형성한 1-2mm의 박관(3)을 삽입하여 박관(3)의 내면과 맨드릴(1)의 표면에 윤활제를 칠하여 박관(3)이 맨드릴(1)를 따라 잘 미끄러지도록 여러개를 끼워서 각 소재(2A)가 서로 접촉되는 접촉근부에는 소재(2A)의 단부가 찌그러지는 것을 방지하기 위한 변형방지링(4)을 끼운후, 피스톤로드(5)의 압판(6)으로 밀어 맨드릴(1)의 외부로 배출시킨다음 박관(3)을 빼어 제거시켜 엘보(2)를 제조함을 특징으로 하는 엘보의 제조방법.The end of the mandrel 1, which is made of the same shape as that of the elbow, is pushed onto the platen 6 secured to the piston rod 5 of the cylinder by inserting several pieces of material 2A cut in a long length into a mandrel 1. In the known method of manufacturing the elbow 2 by discharging the gas through the tube, a 1-2 mm thin tube 3 made of carbon steel and a cut section 3A formed inside the material 2A cut to a predetermined length is formed. Insert and lubricate the inner surface of the tube 3 and the surface of the mandrel 1 so that the tube 3 slides well along the mandrel 1 so that each material 2A comes into contact with each other. Insert the strain relief ring 4 to prevent the end of 2A) from being crushed, push it to the platen 6 of the piston rod 5, and discharge it to the outside of the mandrel 1, and then remove the thin tube 3 to remove it. To produce an elbow (2).
KR1019920014944A 1992-08-18 1992-08-18 Elbow manufacturing method KR950001190B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019920014944A KR950001190B1 (en) 1992-08-18 1992-08-18 Elbow manufacturing method

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Application Number Priority Date Filing Date Title
KR1019920014944A KR950001190B1 (en) 1992-08-18 1992-08-18 Elbow manufacturing method

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KR940003637A KR940003637A (en) 1994-03-12
KR950001190B1 true KR950001190B1 (en) 1995-02-14

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110576224A (en) * 2019-10-11 2019-12-17 缙云唐纳机械科技有限公司 Steel pipe elbow fixed-angle cutting device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110576224A (en) * 2019-10-11 2019-12-17 缙云唐纳机械科技有限公司 Steel pipe elbow fixed-angle cutting device

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Publication number Publication date
KR940003637A (en) 1994-03-12

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