KR20210050231A - Manufacturing method of vehicles exhaust gas recirculation pipe - Google Patents

Manufacturing method of vehicles exhaust gas recirculation pipe Download PDF

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KR20210050231A
KR20210050231A KR1020190134584A KR20190134584A KR20210050231A KR 20210050231 A KR20210050231 A KR 20210050231A KR 1020190134584 A KR1020190134584 A KR 1020190134584A KR 20190134584 A KR20190134584 A KR 20190134584A KR 20210050231 A KR20210050231 A KR 20210050231A
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South Korea
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pipe
exhaust gas
manufacturing
gas recirculation
present
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KR1020190134584A
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Korean (ko)
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임헌정
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주식회사 케이제이
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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
    • B21D53/00—Making other particular articles
    • B21D53/88—Making other particular articles other parts for vehicles, e.g. cowlings, mudguards
    • 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
    • B21D19/00—Flanging or other edge treatment, e.g. of tubes
    • B21D19/08—Flanging or other edge treatment, e.g. of tubes by single or successive action of pressing tools, e.g. vice jaws
    • 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
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/08—Tube expanders
    • 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
    • B21D7/00—Bending rods, profiles, or tubes

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Exhaust Silencers (AREA)

Abstract

The present invention relates to a manufacturing method of a connection pipe for a recirculation apparatus for exhaust gas of a vehicle. The manufacturing method uses a common press machine which comprises: an insert die which suppresses wrinkles on an inflection point unit; a lower frame die which is installed in the insert die to suppress the deformation and elasticity of the pipe; and an upper frame punch elevatably installed on an upper side of the lower frame die. The manufacturing method of the connection pipe for the recirculation apparatus for exhaust gas of the vehicle comprises: a right-angle pipe forming step to press pipe materials and form a hanging flange on an upper-end unit on the outer circumference of the pipe materials; a bending step to bend a first molded article with a hanging flange molded and mold a curve connection unit on a lower side of the first molded article; and a pipe extension and forming step to extend the diameter of each part of a second molded article molded with the curve connection unit and completing the final third molded article. The present invention is able to manufacture a high-quality connection pipe for a recirculation apparatus for exhaust gas of a vehicle more conveniently, improve productivity, and reduce cost price.

Description

자동차 배기가스 재순환장치용 연결파이프의 제조방법 {MANUFACTURING METHOD OF VEHICLES EXHAUST GAS RECIRCULATION PIPE}Manufacturing method of connection pipe for automobile exhaust gas recirculation system {MANUFACTURING METHOD OF VEHICLES EXHAUST GAS RECIRCULATION PIPE}

본 발명은 자동차 배기가스 재순환장치용 연결파이프의 제조방법에 관한 것으로, 더 자세하게는 범용 프레스기계를 통해 적은 수의 제조공정으로 고품질의 연결파이프를 제조할 수 있도록 한 것에 관한 것이다.The present invention relates to a method of manufacturing a connecting pipe for a vehicle exhaust gas recirculation device, and more particularly, to a method for manufacturing a connecting pipe of high quality with a small number of manufacturing processes through a general-purpose press machine.

일반적으로 차량에서 배출되는 대기오염물질을 줄이기 위해 설치하는 배기가스 저감장치는 선택적 촉매 감소장치(SCR; Slective Catalyst Reduction), 배기가스 재순환장치(EGR; Exhaust Gas Recirculation), 디젤 미립자 필터장치(DPF; Diesel Particulate Filter) 등이 있다.In general, an exhaust gas reduction device installed to reduce air pollutants emitted from a vehicle includes a selective catalyst reduction device (SCR), an exhaust gas recirculation device (EGR), and a diesel particulate filter device (DPF; Diesel Particulate Filter).

상기 배기가스 저감장치 중에서 배기가스 재순환장치(EGR)은 엔진에서 연소된 배기가스의 일부를 다시 엔진으로 재순환시켜 연소실 온도를 낮추고, 이로 인해 질소산화물 억제를 유도하는 장치이다.Among the exhaust gas reducing devices, the exhaust gas recirculation device (EGR) is a device that reduces the temperature of the combustion chamber by recirculating part of the exhaust gas burned in the engine back to the engine, thereby inducing nitrogen oxide suppression.

즉, 배기가스가 재순환하면 연소실 온도가 낮아지고 이 과정에서 질소산화물(NOx)의 배출도 줄어드는 원리이다.That is, when the exhaust gas is recycled, the temperature of the combustion chamber is lowered, and the emission of nitrogen oxides (NOx) is also reduced during this process.

질소산화물(NOx)은 연소온도가 2000℃를 넘으면 급격히 증가므로 질소산화물을 감소시키기 위해서는 연소 최고온도를 낮추어야 한다.Since NOx increases rapidly when the combustion temperature exceeds 2000℃, the maximum combustion temperature must be lowered to reduce nitrogen oxides.

배기가스의 일부(혼합기의 약 15%)를 재순환시키면 연소실내에 불활성가스(CO2)가 유입되어 폭발행정시의 연소온도가 낮아지게 되어 질소산화물의 양이 많이 감소하게 된다.When part of the exhaust gas (approximately 15% of the mixer) is recycled, inert gas (CO 2 ) is introduced into the combustion chamber and the combustion temperature during the explosive stroke decreases, thereby greatly reducing the amount of nitrogen oxides.

본 발명은 자동차 배기가스 재순환장치에서 사용되는 연결파이프에 관계한다.The present invention relates to a connecting pipe used in a vehicle exhaust gas recirculation system.

도 1은 본 발명이 관계하는 자동차 배기가스 재순환장치용 연결파이프의 예시도이다.1 is an exemplary diagram of a connecting pipe for a vehicle exhaust gas recirculation device to which the present invention relates.

본 발명이 관계하는 자동차 배기가스 재순환장치용 연결파이프(10)는 도 1과 같이 걸림플랜지(11)의 일측에 수직연결부(12)가 마련되고, 걸림플랜지(10)의 타측에 굴곡연결부(13)가 마련된 형태를 가진다.The connection pipe 10 for a vehicle exhaust gas recirculation device to which the present invention relates is provided with a vertical connection part 12 on one side of the locking flange 11, as shown in FIG. 1, and a bent connection part 13 on the other side of the locking flange 10. ) Is provided.

하기의 특허문헌 1에는 배기기스 재순환 출구 파이프 및 그 제조방법이 개시되어 있다.The following Patent Document 1 discloses an exhaust gas recirculation outlet pipe and a manufacturing method thereof.

대한민국 등록특허공보 제10-1289311호 (2013년 07월 18일 등록)Republic of Korea Patent Publication No. 10-1289311 (registered on July 18, 2013)

도 2는 종래 기술에 따른 자동차 배기가스 재순환장치용 연결파이프의 제조방법에서 사용되는 유압벤딩전용기의 예시도이고, 도 3은 종래 기술에 따른 자동차 배기가스 재순환장치용 연결파이프의 제조방법의 공정순서도이다.FIG. 2 is an exemplary diagram of a hydraulic bending machine used in the manufacturing method of a connection pipe for a vehicle exhaust gas recirculation device according to the prior art, and FIG. 3 is a process flow diagram of a manufacturing method of a connection pipe for a vehicle exhaust gas recirculation device according to the prior art. to be.

종래 기술에 따른 자동차 배기가스 재순환장치용 연결파이프의 제조방법은 유압벤딩전용기를 사용하는 방식으로, 전용설비가 필요할 뿐 아니라 연결파이프의 제조에 필요한 공정수가 많아 연결파이프의 제작이 매우 번거롭게 되고, 커팅 및 디버링 공정에 의해 파이프소재의 일부가 손실되므로 제조비용이 많이 들게 되는 문제가 있었다.The manufacturing method of the connecting pipe for automobile exhaust gas recirculation device according to the prior art is a method of using a hydraulic bending machine, which not only requires a dedicated facility, but also requires a large number of processes required for manufacturing the connecting pipe, making the manufacturing of the connecting pipe very cumbersome and cutting. And because a part of the pipe material is lost due to the deburring process, there is a problem that the manufacturing cost is high.

즉, 종래 기술에 따른 자동차 배기가스 재순환장치용 연결파이프의 제조방법은 파이프소재를 벤딩하는 벤딩단계, 벤딩된 파이프소재의 일단부를 커팅 및 디버링하는 단계, 걸림플랜지를 형성하는 축관포밍단계, 파이프소재의 타단부를 커팅 및 디버링하는 단계, 파이프소재의 직경을 확대시키는 확관포밍단계를 포함하는 등 작업공정수가 많고, 각 작업공정에서 사용하는 공구 및 금형수가 많게 되어 연결파이프의 제작이 매우 번거롭게 되고, 제조비용이 많이 들게 되는 문제가 있었다.That is, the manufacturing method of the connecting pipe for the vehicle exhaust gas recirculation device according to the prior art includes a bending step of bending a pipe material, a step of cutting and deburring one end of the bent pipe material, a shaft pipe forming step of forming a locking flange, and a pipe material. The number of working processes is large, including the step of cutting and deburring the other end of the pipe, and the expansion forming step of expanding the diameter of the pipe material, and the number of tools and molds used in each working process increases, making the production of the connecting pipe very cumbersome. There was a problem that the manufacturing cost was high.

본 발명은 종래 기술에 따른 자동차 배기가스 재순환장치용 연결파이프의 제조방법의 문제점을 해결하기 위한 것으로, 그 목적이 범용 프레스기계를 통해 적은 수의 제조공정으로 간편하게 고품질의 연결파이프를 제조함으로써 연결파이프의 품질 향상과 원가절감을 도모할 수 있도록 하는 자동차 배기가스 재순환장치용 연결파이프의 제조방법을 제공하는 데에 있는 것이다. The present invention is to solve the problem of the manufacturing method of a connection pipe for a vehicle exhaust gas recirculation device according to the prior art, the purpose of which is a connection pipe by simply manufacturing a high-quality connection pipe with a small number of manufacturing processes through a general-purpose press machine. The aim is to provide a method of manufacturing a connecting pipe for automobile exhaust gas recirculation system that can improve the quality of the product and reduce the cost.

상기한 바와 같은 목적을 달성하기 위하여, 본 발명에 따른 자동차 배기가스 재순환장치용 연결파이프의 제조방법은 곡점부 주름을 억제하는 인서트다이; 인서트다이의 내부에 설치되고, 파이프의 변형 및 탄성을 억제하는 하형다이; 하형다이의 상부에 승강 가능하게 설치되는 상형펀치;를 포함하는 범용 프레스기계으로 제조하되, 파이프소재를 프레스하여 파이프소재의 외주 상단부에 걸림플랜지를 성형하는 직관포밍단계; 걸림플랜지가 성형된 제1성형품을 벤딩하여 제1성형품의 하부에 굴곡연결부를 성형하는 벤딩단계; 굴곡연결부가 성형된 제2성형품의 각 부위의 직경을 확장하여 최종 제3성형품을 완성하는 확관포밍단계;를 포함하는 것을 특징으로 한다.In order to achieve the above object, a method of manufacturing a connecting pipe for a vehicle exhaust gas recirculation apparatus according to the present invention includes: an insert die for suppressing wrinkles in curved points; A lower die installed inside the insert die to suppress deformation and elasticity of the pipe; A straight pipe forming step of forming an engaging flange on the upper end of the outer circumference of the pipe material by pressing the pipe material, but manufactured by a general-purpose press machine including; A bending step of bending the first molded product having the locking flange formed thereon to form a bent connection part under the first molded product; It characterized in that it comprises a; expansion forming step of completing the final third molded product by expanding the diameter of each portion of the second molded product in which the bent connection portion is molded.

본 발명에 따른 자동차 배기가스 재순환장치용 연결파이프의 제조방법에 의하면, 범용 프레스기계를 통해 적은 수의 제조공정과 짧은 작업시간으로 고품질의 연결파이프를 제조할 수 있게 되므로 생산성 향상으로 도모할 수 있게 됨은 물론 연결파이프 제조비용을 크게 절감할 수 있게 된다.According to the manufacturing method of a connecting pipe for a vehicle exhaust gas recirculation device according to the present invention, it is possible to manufacture a high-quality connecting pipe with a small number of manufacturing processes and a short working time through a general-purpose press machine, so that productivity can be improved. Of course, it is possible to greatly reduce the manufacturing cost of the connecting pipe.

본 발명에 따른 자동차 배기가스 재순환장치용 연결파이프의 제조방법에 의하면, 파이프소재를 커팅하는 공정 및 디버링하는 공정이 없기 때문에 파이프소재의 손실이 없게 되고, 그에 따라 재료를 절감할 수 있게 되어 연결파이프의 제조원가를 낮출 수 있게 된다.According to the manufacturing method of a connecting pipe for a vehicle exhaust gas recirculation device according to the present invention, there is no loss of pipe material because there is no process of cutting and deburring the pipe material, and thus material can be saved. It is possible to lower the manufacturing cost of the product.

도 1은 본 발명이 관계하는 자동차 배기가스 재순환장치용 연결파이프의 예시도,
도 2는 종래 기술에 따른 자동차 배기가스 재순환장치용 연결파이프의 제조방법에서 사용되는 유압벤딩전용기의 예시도,
도 3은 종래 기술에 따른 자동차 배기가스 재순환장치용 연결파이프의 제조방법의 공정순서도,
도 4는 본 발명에 따른 자동차 배기가스 재순환장치용 연결파이프의 제조방법에서 사용되는 범용 프레스기계의 예시도,
도 5는 본 발명에 따른 자동차 배기가스 재순환장치용 연결파이프의 제조방법의 공정순서도,
도 6a 내지 도 6d는 발명에 따른 자동차 배기가스 재순환장치용 연결파이프의 제조방법의 공정단계별 성형품의 종단면도.1 is an exemplary diagram of a connection pipe for a vehicle exhaust gas recirculation device to which the present invention relates,
2 is an exemplary view of a hydraulic bending machine used in the manufacturing method of a connection pipe for a vehicle exhaust gas recirculation device according to the prior art;
3 is a process flow chart of a method of manufacturing a connection pipe for a vehicle exhaust gas recirculation device according to the prior art,
4 is an exemplary view of a general-purpose press machine used in the manufacturing method of a connecting pipe for a vehicle exhaust gas recirculation device according to the present invention,
5 is a process flow chart of a method of manufacturing a connection pipe for a vehicle exhaust gas recirculation device according to the present invention,
6A to 6D are longitudinal sectional views of a molded article for each process step of a method for manufacturing a connection pipe for a vehicle exhaust gas recirculation device according to the invention.

이하 본 발명에 따른 자동차 배기가스 재순환장치용 연결파이프의 제조방법을 첨부된 도면에 의거하여 상세하게 설명하면 다음과 같다. 참고로, 본 발명을 설명하는데 참조하는 도면에 도시된 구성요소의 크기, 선의 두께 등은 이해의 편의상 다소 과장되게 표현되어 있을 수 있다. Hereinafter, a method of manufacturing a connection pipe for a vehicle exhaust gas recirculation device according to the present invention will be described in detail with reference to the accompanying drawings. For reference, the size of the components, the thickness of the line, and the like shown in the drawings referred to in describing the present invention may be somewhat exaggerated for convenience of understanding.

또, 본 발명의 설명에 사용되는 용어들은 본 발명에서의 기능을 고려하여 정의한 것이므로 사용자, 운용자 의도, 관례 등에 따라 달라질 수 있다. 따라서, 이 용어에 대한 정의는 본 명세서의 전반에 걸친 내용을 토대로 내리는 것이 마땅하다.In addition, terms used in the description of the present invention are defined in consideration of functions in the present invention, and thus may vary according to user, operator intention, custom, and the like. Therefore, it is appropriate to make the definition of this term based on the overall contents of the present specification.

그리고 본 출원에서, '포함하다', '가지다' 등의 용어는 명세서 상에 기재된 특정의 숫자, 단계, 동작, 구성요소, 부품 또는 이들을 조합한 것이 존재함을 지칭하는 것이지, 하나 또는 그 이상의 다른 특징이나 숫자, 단계, 동작, 구성요소, 부품 또는 이들을 조합한 것들의 존재 또는 부가 가능성을 미리 배제하지 않는 것으로 이해되어야 한다.And in the present application, terms such as'include' and'have' refer to the existence of specific numbers, steps, actions, components, parts, or a combination thereof described in the specification. It is to be understood that the presence or addition of features, numbers, steps, actions, components, parts, or combinations thereof, does not preclude the possibility of preliminary exclusion.

또한, 본 발명은 이하에서 개시되는 실시 예에 한정되는 것이 아니라 서로 다른 다양한 형태로 구현될 것이며, 단지 본 실시 예는 본 발명의 개시가 완전하도록 하며, 통상의 지식을 가진 자에게 발명의 범주를 완전하게 알려주기 위해 제공되는 것이다.In addition, the present invention is not limited to the embodiments disclosed below, but will be implemented in a variety of different forms, only the present embodiment makes the disclosure of the present invention complete, and the scope of the invention is given to those of ordinary skill in the art. It is provided to be fully informed.

그러므로, 본 발명은 다양한 변경을 가할 수 있고 여러 가지 형태를 가질 수 있는바, 구현 예(態樣, aspect)(또는 실시 예)들을 명세서에 상세하게 설명하고자 한다. 그러나 이는 본 발명을 특정한 개시 형태에 대해 한정하려는 것이 아니며, 본 발명의 기술적 사상에 포함되는 모든 변경, 균등물 내지 대체물을 포함하는 것으로 이해되어야 하고, 본 명세서에서 사용한 단수의 표현은 문맥상 명백하게 다르게 뜻하지 않는 한, 복수의 표현을 포함한다. Therefore, in the present invention, various changes can be made and various forms can be obtained, and implementation examples (aspects) (or embodiments) will be described in detail in the specification. However, this is not intended to limit the present invention to a specific form of disclosure, and should be understood to include all changes, equivalents, or substitutes included in the technical idea of the present invention, and the expression of the singular number used in the present specification is clearly different from the context. Includes plural expressions unless they are meant to be.

다만, 본 발명을 설명함에 있어서, 주지 또는 공지된 기능 혹은 구성에 대한 구체적인 설명은 본 발명의 요지를 명료하게 하기 위하여 생략하기로 한다.However, in describing the present invention, detailed descriptions of known or known functions or configurations will be omitted in order to clarify the gist of the present invention.

이하에서, "상방", "하방", "전방" 및 "후방" 및 그 외 다른 방향성 용어들은 도면에 도시된 상태를 기준으로 정의한다.Hereinafter, “upward”, “downward”, “front” and “rear” and other directional terms are defined based on the state shown in the drawings.

도 4는 본 발명에 따른 자동차 배기가스 재순환장치용 연결파이프의 제조방법에서 사용되는 범용 프레스기계의 예시도이고, 도 5는 본 발명에 따른 자동차 배기가스 재순환장치용 연결파이프의 제조방법의 공정순서도이고, 도 6a 내지 도 6d는 발명에 따른 자동차 배기가스 재순환장치용 연결파이프의 제조방법의 공정단계별 성형품의 종단면도이다.4 is an exemplary diagram of a general press machine used in the manufacturing method of a connecting pipe for a vehicle exhaust gas recirculation apparatus according to the present invention, and FIG. 5 is a process flow diagram of a manufacturing method of a connecting pipe for a vehicle exhaust gas recirculation apparatus according to the present invention. 6A to 6D are longitudinal cross-sectional views of a molded article for each process step of a method for manufacturing a connection pipe for a vehicle exhaust gas recirculation device according to the present invention.

본 발명에 따른 자동차 배기가스 재순환장치용 연결파이프의 제조방법은 유압벤딩전용기를 사용하지 않고 범용 프레스기계를 사용하는 것으로, 직관포밍단계, 벤딩단계, 확관포밍단계를 포함한다.The manufacturing method of a connecting pipe for a vehicle exhaust gas recirculation device according to the present invention uses a general-purpose press machine without using a hydraulic bending machine, and includes a straight pipe forming step, a bending step, and an expansion pipe forming step.

본 발명에 따른 자동차 배기가스 재순환장치용 연결파이프의 제조방법에서 사용하는 범용 프레스기계(100)는 도 4와 같이 곡점부 주름을 억제하는 인서트다이(110); 인서트다이(110)의 내부에 설치되고, 파이프의 변형 및 탄성을 억제하는 하형다이(120); 하형다이(120)의 상부에 승강 가능하게 설치되는 상형펀치(130);를 포함한다.The general-purpose press machine 100 used in the manufacturing method of a connecting pipe for a vehicle exhaust gas recirculation device according to the present invention includes an insert die 110 for suppressing wrinkles in curved points as shown in FIG. 4; A lower die 120 installed inside the insert die 110 and suppressing deformation and elasticity of the pipe; Includes; an upper punch 130 installed to be elevating on the upper part of the lower die 120.

본 발명에 따른 자동차 배기가스 재순환장치용 연결파이프의 제조방법에서 직관포밍단계는 전술한 범용 프레스기계(100)를 사용하여 도 6a의 파이프소재(P)를 프레스하여 도 6b와 같이 파이프소재(P)의 외주 상단부에 걸림플랜지(11)를 성형하는 단계이다.In the manufacturing method of the connecting pipe for a vehicle exhaust gas recirculation device according to the present invention, the straight pipe forming step is to press the pipe material P of FIG. 6A using the above-described general-purpose press machine 100, and the pipe material P as shown in FIG. 6B. It is a step of forming the engaging flange 11 on the upper end of the outer circumference of the).

벤딩단계는 범용 프레스기계(100)를 사용하여 도 6b와 같이 걸림플랜지(11)가 성형된 제1성형품(P1)을 벤딩하여 도 6c와 같이 제1성형품(P1)의 하부에 굴곡연결부(13)를 성형하는 단계이다.In the bending step, the first molded product P1 having the locking flange 11 formed as shown in FIG. 6B is bent using a general-purpose press machine 100, and the bent connection part 13 at the lower part of the first molded product P1 as shown in FIG. 6C. ) Is the step of molding.

확관포밍단계는 범용 프레스기계(100)를 사용하여 도 6c와 같이 굴곡연결부(13)가 성형된 제2성형품(P2)의 각 부위의 직경을 확장하여 최종 제3성형품(P3)을 완성하는 단계이다.The expansion forming step is a step of completing the final third molded product P3 by expanding the diameter of each portion of the second molded product P2 having the bent connection 13 formed as shown in FIG. 6C using a general-purpose press machine 100 to be.

이처럼 본 발명에 따른 자동차 배기가스 재순환장치용 연결파이프의 제조방법은 범용 프레스기계(100)를 통해 직관포밍단계, 벤딩단계, 확관포밍단계의 적은 수의 제조공정으로 보다 간편하게 고품질의 자동차 배기가스 재순환장치용 연결파이프(10)를 제조할 수 있게 되므로 생산성 향상과 원가절감을 도모할 수 있게 된다.As described above, the manufacturing method of the connecting pipe for a vehicle exhaust gas recirculation device according to the present invention is a simpler high-quality automobile exhaust gas recirculation through a general-purpose press machine 100 with a small number of manufacturing processes including straight pipe forming steps, bending steps, and expansion forming steps. Since the device connection pipe 10 can be manufactured, productivity improvement and cost reduction can be achieved.

또한, 본 발명에 따른 자동차 배기가스 재순환장치용 연결파이프의 제조방법은 커팅공정이 없기 때문에 성형재료의 손실을 없게 된다. In addition, the manufacturing method of the connecting pipe for a vehicle exhaust gas recirculation device according to the present invention does not have a cutting process, so that there is no loss of molding materials.

이상 본 발명자에 의해서 이루어진 발명을 상기 실시 예에 따라 구체적으로 설명하였지만, 본 발명은 상기 실시 예에 한정되는 것은 아니고 그 요지를 이탈하지 않는 범위에서 여러 가지로 변경 가능한 것은 물론이다.Although the invention made by the present inventor has been described in detail according to the above embodiment, the invention is not limited to the above embodiment and can be changed in various ways without departing from the gist of the invention.

10 : 자동차 배기가스 재순환장치용 연결파이프
11 ; 걸림플랜지
12 : 수직연결부
13 : 굴곡연결부
100 : 범용 프레스기계
110 : 인서트다이
120 : 하형다이
130 : 상형펀치 10: Connection pipe for automobile exhaust gas recirculation system
11; Jam flange
12: vertical connection
13: flexure connection
100: universal press machine
110: insert die
120: Lower Hyung Die
130: upper punch

Claims (1)

곡점부 주름을 억제하는 인서트다이(110); 인서트다이(110)의 내부에 설치되고, 파이프의 변형 및 탄성을 억제하는 하형다이(120); 하형다이(120)의 상부에 승강 가능하게 설치되는 상형펀치(130);를 포함하는 범용 프레스기계(100)으로 제조하되,
파이프소재(P)를 프레스하여 파이프소재(P)의 외주 상단부에 걸림플랜지(11)를 성형하는 직관포밍단계;
걸림플랜지(11)가 성형된 제1성형품(P1)을 벤딩하여 제1성형품(P1)의 하부에 굴곡연결부(13)를 성형하는 벤딩단계;
굴곡연결부(13)가 성형된 제2성형품(P2)의 각 부위의 직경을 확장하여 최종 제3성형품(P3)을 완성하는 확관포밍단계;를 포함하는 것을 특징으로 하는 자동차 배기가스 재순환장치용 연결파이프의 제조방법.Insert die 110 for suppressing wrinkles in the curved portion; A lower die 120 installed inside the insert die 110 and suppressing deformation and elasticity of the pipe; It is manufactured with a general-purpose press machine 100 including; an upper punch 130 installed to be elevating on the upper part of the lower die 120,
A straight pipe forming step of pressing the pipe material (P) to form a locking flange 11 on the upper end of the outer circumference of the pipe material (P);
A bending step of bending the first molded product P1 in which the locking flange 11 is formed to form the bent connector 13 under the first molded product P1;
Expansion forming step of completing the final third molded product (P3) by expanding the diameter of each portion of the second molded product (P2) in which the bent connector 13 is molded; connection for automobile exhaust gas recirculation device comprising How to make a pipe.
KR1020190134584A 2019-10-28 2019-10-28 Manufacturing method of vehicles exhaust gas recirculation pipe KR20210050231A (en)

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101289311B1 (en) 2011-06-10 2013-07-24 이정대 Exhaust Gas Recycling Outlet Pipe and Method for Preparing the Same

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101289311B1 (en) 2011-06-10 2013-07-24 이정대 Exhaust Gas Recycling Outlet Pipe and Method for Preparing the Same

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