KR890000919B1 - Manufacturing method of uniform thickness nipple - Google Patents

Manufacturing method of uniform thickness nipple Download PDF

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Publication number
KR890000919B1
KR890000919B1 KR1019850007080A KR850007080A KR890000919B1 KR 890000919 B1 KR890000919 B1 KR 890000919B1 KR 1019850007080 A KR1019850007080 A KR 1019850007080A KR 850007080 A KR850007080 A KR 850007080A KR 890000919 B1 KR890000919 B1 KR 890000919B1
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South Korea
Prior art keywords
nipple
pipe
uniform thickness
manufacturing
thickness
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KR1019850007080A
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Korean (ko)
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KR870003338A (en
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김인병
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김인병
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Priority to KR1019850007080A priority Critical patent/KR890000919B1/en
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Publication of KR890000919B1 publication Critical patent/KR890000919B1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L15/00—Screw-threaded joints; Forms of screw-threads for such joints

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
  • Forging (AREA)

Abstract

Steel pipe (1) is compressed by a press (3). Both ends of the steel pipe (1) are contracted. The thread parts (7,7') are formed on the surfaces of circular cone type pipes (6,6'). The thickness of the nipple is uniform.

Description

균일 두께로 형성한 강력 닛플의 제조방법Manufacturing method of strong nipple formed with uniform thickness

제1도는 본 발명을 실시키 위한 압축 공정 설명도.1 is an explanatory diagram of a compression process for implementing the present invention.

제2도는 본 발며의 닛플의 일부를 절제 표시한 사시도.2 is a perspective view showing a part of the nipple of the foot restrained.

제3도의 (a)는 본 발명의 단관을 압축한 상태의 단면 설명도.Fig. 3A is a cross-sectional explanatory diagram in a state in which the short pipe of the present invention is compressed.

제3도의 (b)는 본 발명의 닛플을 완성한 상태의 단면 설명도.Fig. 3B is a cross-sectional explanatory view of the state where the nipple of the present invention is completed.

제4도는 종래 통상의 닛플의 단면 설명도.4 is a cross-sectional explanatory diagram of a conventional nipple.

본 발명은 파이프의 배관시에 파이프와 파이프를 연결하는데 사용하는 닛플 (Nipple)을 성형함에 있어서, 닛플의 중앙부위나 양단 나사부위의 두께가 균일하게 성형되게 하여 양쪽에서 파이프를 나삽할 시에 양쪽 파이프의 비틀림에도 변형이 없고, 내외의 압력에도 오래 견디게 하여 내용물의 누설이나 파손됨이 없게한 균일 두께로 형성한 강력 닛플의 제조방법에 관한 것이다.In the present invention, in forming a nipple used to connect a pipe to a pipe when the pipe is piped, the thickness of the center portion of the nipple or the screw portions at both ends is uniformly formed so that both pipes can be used when the pipes are screwed from both sides. The present invention relates to a method for producing a strong nipple having a uniform thickness which is free from deformation in the torsional force and withstands internal and external pressure for a long time so that the contents are not leaked or damaged.

종래의 닛플에 있어서는 평관으로된 단관(短管)의 주면을 테이퍼 형상으로 나사면을 절삭하여 형성한 것이어서, 제4도에 도시된 바와같이 중앙부위에서 양끝단에 갈수록 두께가 얇아지는 것인 바, 시공시 파이프를 양쪽에 연결할 시 파이프의 두께가 얇은 관계로 연결부위의 응력이 약화되어 양쪽 파이프의 비틀림이나 내부의 압력에 의해 쉽게 파손되므로 배관의 신뢰성이 떨어질 뿐 아니라 사용수명 역시 매우 짧았던 결점이 있었다. 본 발명은 파이프 연결에 사용되는 닛플에 관하여 전기와 같은 결점을 제거코져 발명한 것으로서, 본 발명의 요지를 도면의 실시예에 의하여 상세히 설명하면 다음과 같다.In the conventional nipple, the main surface of the flat pipe is formed by cutting the screw surface in a tapered shape, and as shown in FIG. 4, the thickness becomes thinner toward both ends at the center portion. When connecting the pipes at the time of construction, the thickness of the pipe is thin, so the stress of the connection is weakened, and it is easily damaged by the torsion of both pipes or the internal pressure. . The present invention has been invented to remove the defects such as electricity with respect to the nipple used for pipe connection, and the gist of the present invention will be described in detail by the embodiments of the drawings.

철파이프로 된 단관(1)을 형성한후, 이 단관(1)을 테이퍼상의 요홈부(2)(2')가 형성된 압축프레스기(3)로 제1도에서와 같이 압압하여 그 압력에 의하여 제3도(a)에서와 같이 양단부(4)(4')가 수축되게 하여 중앙부(5)를 중심으로 그 양쪽에 균일 두께의 원추형관(6)(6')이 형성되게 한후, 원추형관(6)(6')의 표면에 나사부(7)(7')를 전조시켜 형성한 것이다. 미설명 부호 8, 8'는 단관 이탈구, 9는 프레스기 대판이다.After the short pipe 1 made of iron pipes is formed, the short pipe 1 is pressed by a compression press 3 having a tapered recess 2, 2 ′ as shown in FIG. As shown in Fig. 3 (a), both ends 4 and 4 'are contracted so that conical tubes 6 and 6' of uniform thickness are formed on both sides of the central portion 5, and then conical tubes are formed. (6) It is formed by rolling the screw parts 7 and 7 'on the surface of 6'. Reference numerals 8 and 8 'denote short pipe exits, and 9 denotes press machines.

이상과 같은 본 발명의 작용효과를 상세히 설명하면 다음과 같다.Referring to the effects of the present invention as described above in detail.

먼저 작업 공정에 의거하여 설명하면, 긴 철재파이프 상에서 짧게 절단하여 다수개의 단관(1)을 성형한 다음, 이를 압축프레스기(3)의 양 요홈부(2)(2')사이에 재치시킨 후 압압시키면 압축프레스기(3)의 압력에 의하여 단관(1)이 길이방향으로 수축되면서 내면 쪽으로 오그라져 제3도(a)와 같이 중앙부(5)를 중심으로 양쪽에 균일한 두께의 원추형관(6)(6')이 형성되면서 조직은 더욱 치밀하게 형성되는 것이다.First, according to the working process, a short cut on a long steel pipe is formed to form a plurality of end pipes (1), and then placed between the grooves (2) (2 ') of the compression press (3) and then pressed When the end pipe 1 is contracted in the longitudinal direction by the pressure of the compression press 3, the conical tube 6 of uniform thickness is formed on both sides of the center part 5 as shown in FIG. As the 6 'is formed, the tissue is formed more densely.

이에 요홈부(2)(2')로부터 단관이탈구(8)(8')로 단관(1)을 이탈수킨후, 통상의 전조기계에 의하여 원추형관(6)(6')의 외주면에 나사부(7)(7')를 형성하여 강력닛플을 완성하는 것인데 그 제품의 두께는 중앙부(5)나 원추형관(6)(6')이 모두 거의 일정하므로 외부의 파이프에서 가해지는 비틀림등의 압력에 대하여 그 저항력이 매우 높아서 연결부위의 균열 등의 고장이 없고, 따라서 내부의 유동물의 누설이 없게 되므로 지상이나 지중에 매설시에 그 배관에 대한 신뢰성이 향상되며 장기간 유지될 수 있는 효과가 있다.Accordingly, after the short pipe 1 is pulled out from the recess 2, 2 'by the short pipe escape port 8, 8', the thread is formed on the outer circumferential surface of the conical pipe 6, 6 'by a common rolling machine. (7) (7 ') to form a strong nipple, and the thickness of the product is almost constant in the center part (5) or conical tube (6) (6'), so the pressure such as torsion in the external pipe Since the resistance is very high, there is no breakdown of the connection part, and thus there is no leakage of the internal fluid, so that the reliability of the pipe can be improved and be maintained for a long time when it is buried in the ground or underground. .

Claims (1)

철파이프제의 단관(1)을 테이퍼형의 요홈부(2)(2')가 형성된 압축프레스기(3)로 압압하여 그 압력으로 양단부(4)(4')가 수축되게 하여 중앙부(5)를 중심으로 양쪽에 균일 두께의 원추형관(6)(6')을 형성되게 한후, 그 표면에 나사부(7)(7')를 전조시켜 형성함을 특징으로 하는 균일 두께로 형성한 강력 닛플의 제조방법.The short pipe 1 made of iron pipe is pressed by a compression press 3 having a tapered recess 2, 2 ′, and both ends 4, 4 ′ are contracted by the pressure, so that the center portion 5 is pressed. The convex tubes 6 and 6 'of uniform thickness are formed on both sides, and then the threaded portions 7 and 7' are rolled on the surface thereof. Manufacturing method.
KR1019850007080A 1985-09-24 1985-09-24 Manufacturing method of uniform thickness nipple KR890000919B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019850007080A KR890000919B1 (en) 1985-09-24 1985-09-24 Manufacturing method of uniform thickness nipple

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019850007080A KR890000919B1 (en) 1985-09-24 1985-09-24 Manufacturing method of uniform thickness nipple

Publications (2)

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KR870003338A KR870003338A (en) 1987-04-16
KR890000919B1 true KR890000919B1 (en) 1989-04-13

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KR1019850007080A KR890000919B1 (en) 1985-09-24 1985-09-24 Manufacturing method of uniform thickness nipple

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KR870003338A (en) 1987-04-16

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