KR20030089051A - Method of pressing a reducing pipe - Google Patents

Method of pressing a reducing pipe Download PDF

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Publication number
KR20030089051A
KR20030089051A KR1020020026963A KR20020026963A KR20030089051A KR 20030089051 A KR20030089051 A KR 20030089051A KR 1020020026963 A KR1020020026963 A KR 1020020026963A KR 20020026963 A KR20020026963 A KR 20020026963A KR 20030089051 A KR20030089051 A KR 20030089051A
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KR
South Korea
Prior art keywords
pipe
press
reducer
length
band
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KR1020020026963A
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Korean (ko)
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KR100466067B1 (en
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이도연
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이도연
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Priority to KR10-2002-0026963A priority Critical patent/KR100466067B1/en
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    • 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
    • B21D51/00—Making hollow objects
    • B21D51/02—Making hollow objects characterised by the structure of the objects
    • B21D51/10—Making hollow objects characterised by the structure of the objects conically or cylindrically shaped objects
    • 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
    • B21D17/00—Forming single grooves in sheet metal or tubular or hollow articles
    • B21D17/02—Forming single grooves in sheet metal or tubular or hollow articles by pressing
    • 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
    • B21D41/00—Application of procedures in order to alter the diameter of tube ends
    • B21D41/04—Reducing; Closing
    • 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
    • B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/28—Associations of cutting devices therewith
    • B21D43/285—Devices for handling elongated articles, e.g. bars, tubes or profiles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H3/00—Making helical bodies or bodies having parts of helical shape
    • B21H3/08—Making helical bodies or bodies having parts of helical shape internal screw-threads

Abstract

PURPOSE: A press forming method of reducer pipe is provided to form an ordinary pipe into a reducer pipe on the intermediate part of which band protrusion is formed by press working the ordinary pipe. CONSTITUTION: The press forming method of reducer pipe comprises first process of removing welding beads formed on the inner circumference of the pipe by selecting a pipe having diameter corresponding to the large diameter out of small and large diameters of the reducer pipe; second process of cutting the pipe to a length calculated as the total length by taking into account length of the reducer pipe and length of band protrusion to be formed on the intermediate part of the reducer pipe; third process of smoothly processing rough surface of both cut ends of the pipe; fourth process of first clinching the pipe using press so that a semicircular band projection part having a double size compared to width of the band protrusion is formed on the intermediate part of the pipe; fifth process of second clinching the pipe using the press again so that the semicircular band projection part is formed into a certain band protrusion; and sixth process of performing pipe contraction operation on one side part of the pipe using the press so that only half of length of one side part of the pipe is formed into a small diameter, wherein a screw part is formed on the inner circumference of the small diameter of one side part of the pipe.

Description

리듀서관의 프레스 성형방법 {Method of pressing a reducing pipe}Press forming method of reducer tube {Method of pressing a reducing pipe}

본 발명은 일반파이프를 프레스 가공으로 중간부에 띠돌기가 형성된 리듀서관으로 성형할 수가 있는 리듀서관의 프레스 성형방법에 관한 것이다.The present invention relates to a press forming method of a reducer tube capable of forming a general pipe into a reducer tube having a band protrusion formed at an intermediate portion thereof by press working.

통상 리듀서관은 일측부와 타측부의 직경크기가 서로 다르고 리듀서관의 중간부에는 커플링으로 연결할 때 커플링의 선단 연결홈에 끼워 고정시킬 띠돌기를 형성시켜야 되므로 지금까지는 리듀서관을 제조시 주물에만 의존하여 성형하였으므로 생산 할수 있는 제품의 숫자가 한정되고 또한 제품의 무게가 무거워 제조원가의 상승원인이 되었다.In general, reducer pipes have different diameter sizes on one side and the other side, and the middle part of the reducer pipe has to form a band projection to be fixed to the coupling groove at the end of the coupling when the coupling pipe is connected. Because it was molded only on the basis, the number of products that could be produced was limited, and the weight of the product was heavy, which led to an increase in manufacturing cost.

일반파이프를 프레스 가공으로 중간부에 띠돌기가 형성된 리듀서관으로 성형하기 위하여 제1공정에서 리듀서관의 크고 작은 직경 중 큰직경 크기와 일치하는 파이프를 선택하여 내부주연의 용접비드(Bead)를 제거시키고 제2공정에서 리듀서관의 길이와 중간부에 형성시킬 띠돌기의 길이를 감안한 전체 길이를 산정하여 파이프를 절단시키고 제3공정에서 이 절단된 양끝단의 거친면을 매끈하게 가공시키고 제4공정에서 이 파이프를 프레스의 1차 클린칭(Clinching) 작업으로 파이프의 중간부에 띠돌기 폭의 2배 크기의 반원형 띠돌출부로 성형시키고 제5공정에서 다시 프레스의 2차 클린칭 작업으로 소정의 띠돌기로 성형시키고 제6공정에서 이 파이프의 일측부를 프레스의 관축소 작업으로 일측부 길이의 절반만 작은 직경으로 성형시켜서 일측부와 타측부의 직경이 서로 다르고 중간부에 띠돌기가 형성된 리듀서관으로 성형시킬 수가 있는 것으로 도면에 의거 제조공정을 상세히 설명하면 다음과 같다.In order to form the pipe into a reducer tube formed with a band protrusion at the middle part by press working, in the first step, a pipe matching the large diameter size among the large and small diameters of the reducer tube is selected to remove the weld bead of the inner circumference. In the second process, the pipe is cut by calculating the total length considering the length of the reducer tube and the length of the band protrusion to be formed in the middle part. In the third process, the rough surface of the cut ends is smoothly processed and the fourth process is performed. This pipe is formed into semi-circular strip protrusions with a size twice as large as the band protrusion width in the middle of the pipe by the first clinching of the press, and then the second strip of clinching by the second step In the sixth process, one side of this pipe is formed into a diameter smaller than half of one side length by tube shrinkage of the press. Are different from each other in diameter will be described in detail according to the manufacturing process in the figure that can be formed into a tube reducer strip projection formed in a middle part follows.

도 1은 본 발명의 성형공정으로 제조된 리듀서관의 일부절결 사시도1 is a partially cutaway perspective view of a reducer tube manufactured by a molding process of the present invention

도 2a 내지 도 2g 는 본 발명의 성형공정을 보인 단면도Figure 2a to 2g is a cross-sectional view showing the molding process of the present invention

제1공정1st process

리듀서관의 크기가 서로 다른 크고 작은 직경 중 큰직경 크기와 일치하는 파이프를 선택하여 파이프 제조시 내부주연에 잔재하는 용접비트를 제거시킨다.By selecting pipes with different reducer pipe sizes that match the larger diameter size, the weld bits remaining in the inner circumference are removed during pipe manufacturing.

용접비트의 제거작업은 프레스 가공시 파이프가 금형내에 걸리지 않고 쉽게 삽입 또는 분리시키기 위한 것이다.The removal work of the welding bit is for easy insertion or removal of the pipe without being caught in the mold during press working.

제2공정2nd process

용접비트를 제거한 파이프를 리듀서관 길이와 중간부에 형성시킬 띠돌기의길이를 감안하여 전체길이로 산정한 길이로 파이프를 일정하게 절단시킨다.Considering the length of the stripping protrusion to form the pipe with the weld bit removed in the middle of the reducer pipe, the pipe is cut regularly to the length calculated as the total length.

중간부에 형성시킬 띠돌기의 길이는 파이프의 중간부가 외향으로 굴곡되어 띠돌기를 형성하기 위한 소요 길이 이다.The length of the band protrusion to be formed in the middle part is the required length for forming the band protrusion by bending the outward middle part of the pipe.

제3공정3rd process

일정한 길이로 절단된 파이프 양끝단의 거친 절단면, 특히 내부주연쪽의 날카로운 돌출부위를 자동선반으로 매끈하게 가공시킨다.Rough cuts at both ends of the pipe cut to a certain length, especially sharp protrusions on the inner circumference, are smoothly processed by automatic lathes.

이 거친 절단면의 가공은 프레스 가공시의 금형내 삽입 및 분리작업을 순조롭게 하고 완성된 리듀서관의 품질을 향상토록 하기 위한 것이다.This rough cut surface is intended to smoothly insert and remove molds during press processing and to improve the quality of the finished reducer tube.

제4공정4th process

이렇게 절단면이 가공된 파이프를 중간부의 띠돌기 형성을 위하여 프레스의 1차 클린칭 작업으로 띠돌기 폭의 2배 크기의 반원형 띠돌출부로 성형시킨다.In this way, the cut pipe is formed into a semi-circular band protrusion having a size twice the band width by the first clinching operation of the press to form the band protrusion in the middle portion.

1차 클린칭 가공때 소정 띠돌기 폭의 2배 크기로 완만하게 반원형 띠돌출부로 형성하는 것은 띠돌기의 무리없는 성형가공과 성형시의 내부응력을 최소화 하기 위한 것이다.In the first clinching process, the semi-circular strip protrusions are formed to be twice the width of the band protrusions to minimize the internal stress during molding and the smooth processing of the band protrusions.

제5공정5th process

띠돌기 폭의 2배 크기로 가공한 반원형 띠돌출부를 다시 프레스의 2차 클린칭 작업으로 소정 폭크기의 띠돌기로 성형시킨다.The semi-circular strip projections processed to twice the width of the strip projections are formed into strip projections having a predetermined width in the second clinching operation of the press.

이렇게 중간부에 형성된 띠돌기는 리듀서관을 커플링으로 연결할 때 이 중간부의 띠돌기를 커플링의 선단 연결홈에 끼워 고정하기 위한 것이다.The band protrusion formed in the middle portion is to fix the band protrusion in the middle connecting groove to the distal end groove of the coupling when the reducer tube is connected to the coupling.

제6공정6th process

중간부에 띠돌기가 형성된 파이프의 일측부를 리듀서관의 작은 직경이 되게 프레스의 관축소 작업으로 일측부 길이의 절반 길이만 작은 직경으로 축소하여 리듀서관으로 성형시킨다.One side of the pipe formed with a band protrusion in the middle portion is reduced to a smaller diameter by reducing the length of only one half of the length of one side by the tube reduction operation of the press to be the small diameter of the reducer tube.

이렇게 일측부 길이의 절반 길이만을 관축소 하므로서 리듀서관 중간부의 띠돌기를 커플링의 선단홈에 끼워 요철로서 체결시 띠돌기 양측의 동일크기의 큰직경이 커플링의 선단 내외측에서 지지가 되어 연결을 견고하게 하기 위한 것이다.In this way, only half the length of one side of the tube is reduced, and the banding of the middle of the reducer tube is inserted into the distal end of the coupling. It is to solidify.

제7공정7th process

일측부는 작은직경으로 타측부는 큰직경으로 성형가공된 리듀서관을 크고 작은 직경의 내,외부주연에 파이프 연결을 위한 나사부를 선택적으로 가공시킨다.One side of the small diameter and the other side of the large diameter molded reducer tube to process the thread for pipe connection to the inner and outer periphery of large and small diameters selectively.

이렇게 크고 작은 직경의 내,외부주연에 나사부를 형성하므로서 직경크기가 다른 파이프를 직접 연결하기 위한 것이다.This is for directly connecting pipes of different diameter sizes by forming threads on the inner and outer circumferences of large and small diameters.

이와같이 본 발명은 일반파이프를 프레스가공으로 중간부에 띠돌기가 형성된 리듀서관으로 성형시키므로서 대량생산이 가능하고 또한 커플링의 무게도 주물제품 보다 절반이하로 경감되어 제조원가를 50∼60% 정도로 줄일 수가 있고 이와같은 제조공정으로 성형가공된 리듀서관의 사용상태를 설명하면 리듀서관의 중간부에 형성된 띠돌기를 이용하여 커플링의 선단연결홈에 요철로서 삽입시켜 고정시키므로서 일반적인 커플링으로 연결하여 사용할 수가 있고 또한 리듀서관의 크고 작은 직경의 내,외부주연에 나사부를 형성시켜 리듀서관에 직경크기가 서로 다른 파이프를직접 연결하여 사용할 수도 있는 것이다.As such, the present invention can be mass-produced by forming a general pipe into a reducer tube having a band protrusion in the middle thereof, and the weight of the coupling is reduced to less than half of the casting product, thereby reducing the manufacturing cost by 50 to 60%. If the use state of the reducer tube formed by such a manufacturing process is explained, the banding protrusion formed in the middle portion of the reducer tube is inserted into the distal end groove of the coupling to be fixed as a concave-convex and connected by a general coupling. It can also be used, and by forming the threaded portion in the inner and outer circumference of the reducer pipe large and small diameters can be directly connected to pipes of different diameters in the reducer pipe.

Claims (2)

일반파이프를 프레스 가공으로 중간부에 띠돌기가 형성된 리듀서관으로 성형하기 위하여 제1공정에서 리듀서관의 크고 작은 직경 중 큰직경 크기와 일치하는 파이프를 선택하여 내부주연의 용접비드를 제거시키고 제2공정에서 리듀서관의 길이와 중간부에 형성시킬 띠돌기의 길이를 감안하여 전체 길이로 산정한 길이로 파이프를 절단시키고 제3공정에서 이 절단된 양끝단의 거친면을 매끈하게 가공시키고 제4공정에서 이 파이프를 프레스의 1차 클린칭 작업으로 중간부에 띠돌기 폭의 2배 크기의 반원형 띠돌출부로 성형시키고 제5공정에서 다시 프레스의 2차 클린칭 작업으로 소정의 띠돌기로 성형시키고 제6공정에서 이 파이프의 일측부를 프레스의 관축소 작업으로 일측부 길이의 절반만 작은 직경으로 성형시켜서 된 리듀서관의 프레스 성형방법.In order to form a general pipe into a reducer tube formed with a band protrusion at the middle part by pressing, in the first step, a pipe matching the large diameter size among the large and small diameters of the reducer tube is selected to remove the weld bead of the inner circumference and the second Taking into account the length of the reducer tube and the length of the band projection to be formed in the middle part, the pipe is cut to the length calculated as the total length.In the third process, the rough surface of the cut ends is smoothly processed and the fourth process is performed. The pipe is formed into a semi-circular band protrusion having a size twice the width of the band protrusion in the middle by the first clinching operation of the press, and is formed into a predetermined band bump by the second clinching operation of the press in the fifth process. The press-molding method of the reducer tube which shape | molded the one side part of this pipe by the tube reduction operation of a press in 6th process to the diameter smaller than half of one side length. 제1항에 있어서 일측부 작은 직경의 내부주연에 나사부를 형성시켜서 된 리듀서관의 프레스 성형방법.The press molding method of the reducer pipe | tube of Claim 1 formed by forming the thread part in the inner periphery of one side small diameter.
KR10-2002-0026963A 2002-05-16 2002-05-16 Method of pressing a reducing pipe KR100466067B1 (en)

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Application Number Priority Date Filing Date Title
KR10-2002-0026963A KR100466067B1 (en) 2002-05-16 2002-05-16 Method of pressing a reducing pipe

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KR100466067B1 KR100466067B1 (en) 2005-01-13

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011074756A1 (en) * 2009-12-14 2011-06-23 엘아이지에이디피 주식회사 Substrate processing method

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03275218A (en) * 1990-03-26 1991-12-05 Nippon Steel Corp Manufacture of double layered reducer pipe fitting
JP3434849B2 (en) * 1993-03-31 2003-08-11 株式会社松村機械製作所 Press-type pipe end processing method and apparatus
JPH10193452A (en) * 1997-01-09 1998-07-28 Sekisui Chem Co Ltd Manufacture of resin reducer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011074756A1 (en) * 2009-12-14 2011-06-23 엘아이지에이디피 주식회사 Substrate processing method

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