KR20030021079A - Manufacturing method of cylinder block for engine - Google Patents

Manufacturing method of cylinder block for engine Download PDF

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Publication number
KR20030021079A
KR20030021079A KR1020010054575A KR20010054575A KR20030021079A KR 20030021079 A KR20030021079 A KR 20030021079A KR 1020010054575 A KR1020010054575 A KR 1020010054575A KR 20010054575 A KR20010054575 A KR 20010054575A KR 20030021079 A KR20030021079 A KR 20030021079A
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South Korea
Prior art keywords
cylinder block
manufacturing
aluminum alloy
casting
cylinder
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KR1020010054575A
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Korean (ko)
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KR100427281B1 (en
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김종명
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현대자동차주식회사
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Priority to KR10-2001-0054575A priority Critical patent/KR100427281B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D15/00—Casting using a mould or core of which a part significant to the process is of high thermal conductivity, e.g. chill casting; Moulds or accessories specially adapted therefor
    • B22D15/02—Casting using a mould or core of which a part significant to the process is of high thermal conductivity, e.g. chill casting; Moulds or accessories specially adapted therefor of cylinders, pistons, bearing shells or like thin-walled objects
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/004—Cylinder liners

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)

Abstract

PURPOSE: A method of manufacturing a cylinder block for an engine is provided to improve contact among materials, settle a contact problem made by difference of thermal expansion coefficient, and prevent generation of defect in casting the cylinder block. CONSTITUTION: A method of manufacturing a cylinder block for an engine comprises steps of manufacturing an aluminium alloy cylinder liner, by a spray forming method(S1); installing the aluminum alloy cylinder liner in a metal mold for casting a cylinder block(S2); and casting the cylinder block by injecting aluminum alloy liquid metal under high pressure into the metal mold(S3). Since the cylinder liner of the same material, manufactured by the spray forming method is installed, contact among materials is improved.

Description

엔진용 실린더 블록 제조방법{Manufacturing method of cylinder block for engine}Manufacturing method of cylinder block for engine

본 발명은 엔진용 실린더 블록 제조방법에 관한 것으로서, 더욱 상세하게는분무성형의 제조방법을 이용하여 알루미늄 합금재의 실린더 라이너를 제조하는 단계와, 이 알루미늄 합금재의 실린더 라이너를 실린더 블록 주조용 금형 내에 설치하는 단계와, 이 금형 내로 알루미늄 합금 용탕을 고압 사출하여 실린더 블록을 주조하는 단계를 포함하여 이루어진 엔진용 실린더 블록 제조방법에 관한 것이다.The present invention relates to a method for manufacturing a cylinder block for an engine, and more particularly, to manufacturing a cylinder liner made of an aluminum alloy material using a spray molding method, and installing the cylinder liner made of the aluminum alloy material in a mold for casting a cylinder block. And a step of casting a cylinder block by high-pressure injection of aluminum alloy molten metal into the mold.

일반적으로 차량 엔진용 실린더 블록은 차량을 구성하는 부품 중 가장 큰 주물 부품 중 하나이며, 엔진 몸체를 구성시켜주는 모든 내연기관의 핵심부품이다.In general, the cylinder block for a vehicle engine is one of the largest casting parts of the parts constituting the vehicle and is a core part of all internal combustion engines constituting the engine body.

현재 많이 사용되는 실린더 블록의 재질로서, 회주철(FC25) 또는 합금주철 (FCH4) 등과 같은 주철재가 있으나, 차량의 경량화 요구나 성능향상을 위하여 가솔린용 엔진을 대상으로 점차 알루미늄 합금의 사용이 늘어가고 있는 추세이다.There are cast iron materials such as gray cast iron (FC25) or alloy cast iron (FCH4), which are widely used in cylinder blocks, but aluminum alloys are increasingly used for gasoline engines to reduce the weight and performance of vehicles. There is a trend.

그러나, 알루미늄 합금재의 실린더 블록에서도 보어 내면상에 외주면이 밀착 고정되는 실린더 라이너 만큼은 피스톤과의 마찰 및 마모에 잘 견딜 수 있도록 주철을 재질로 하여 제조된다.However, in the cylinder block of the aluminum alloy material, the cylinder liner whose outer circumferential surface is tightly fixed on the inner surface of the bore is made of cast iron so as to withstand the friction and wear with the piston.

상기와 같이 알루미늄 합금을 재질로 한 실린더 블록의 제조방법은 크게 주철 라이너를 삽입한 상태에서 다이캐스팅(die casting) 주조방법을 이용하여 실린더 블록을 주조하는 방법과, 실린더 블록을 먼저 제조 및 가공한 후 주철 라이너를 보어에 압입하여 제조하는 방법으로 대별된다.As described above, a method of manufacturing a cylinder block made of an aluminum alloy includes a method of casting a cylinder block using a die casting casting method with a large cast iron liner inserted therein, and first manufacturing and processing the cylinder block. It is roughly classified into a method of manufacturing a cast iron liner by pressing it into a bore.

여기서, 다이캐스팅 주조방법을 이용한 실린더 블록의 제조방법은 중력금형주조나 저압주조에 비해 생산성이 월등히 우수한 제조 방법으로 최근 양산 적용되기 시작한 기술이며, 주철 라이너를 금형에 설치한 후, 알루미늄 합금 용탕을 고속ㆍ고압 다이캐스팅 머신을 통해 금형 내 캐비티로 사출하여, 실린더 블록을 제조하는 방법이다.Here, the manufacturing method of the cylinder block using the die casting casting method is a technology that has been mass-produced in recent years as a production method which is much more productive than the gravity mold casting or the low pressure casting, and after the cast iron liner is installed in the mold, the aluminum alloy molten metal is rapidly produced. A method of manufacturing a cylinder block by injection into a cavity in a mold through a high pressure die casting machine.

그러나, 상기와 같이 다이캐스팅 주조방법에 의해 제조된 실린더 블록에 주철 라이너가 사용될 경우에는 주철과 알루미늄 합금간 열팽창계수의 차이로 인하여 실린더 블록의 보어 내면과 실린더 라이너의 외주면이 서로 밀착되지 않는 문제가 발생하였다.However, when the cast iron liner is used in the cylinder block manufactured by the die casting casting method as described above, a problem arises in that the bore inner surface of the cylinder block and the outer circumferential surface of the cylinder liner do not come into close contact with each other due to the difference in the coefficient of thermal expansion between the cast iron and the aluminum alloy. It was.

이는 실린더 블록의 주조시 결함발생의 원인이 되고, 이것이 다량 발생되는 경우 실린더 블록의 내구성을 취약하게 하는 결정적 원인이 되고 있는 바, 이에 대한 대처방안이 요구된다.This causes the occurrence of defects in the casting of the cylinder block, which is a critical cause of weakening the durability of the cylinder block when a large amount is generated, a countermeasure is required.

따라서, 본 발명은 상기와 같은 문제점을 해결하기 위하여 발명한 것으로서, 분무성형법을 이용하여 제조되는 동일 재질의 실린더 라이너가 설치되도록 함으로써, 소재간 밀착성이 향상됨과 동시에 열팽창계수의 차이로 발생하던 종래의 밀착성 문제를 해소할 수 있고, 이에 따라 실린더 블록 주조시 결함발생을 방지할 수 있는 엔진용 실린더 블록 제조방법을 제공하는데 그 목적이 있다.Therefore, the present invention was invented to solve the above problems, and by installing a cylinder liner of the same material manufactured by the spray molding method, the adhesion between the materials is improved and the conventional thermal expansion coefficient caused by the difference in the coefficient of thermal expansion An object of the present invention is to provide a method of manufacturing a cylinder block for an engine that can solve an adhesive problem and thus prevent a defect from occurring when casting a cylinder block.

도 1은 본 발명에 따른 실린더 블록 제조방법을 나타내는 순서도.1 is a flow chart showing a cylinder block manufacturing method according to the present invention.

이하, 첨부한 도면을 참조하여 본 발명을 설명하면 다음과 같다.Hereinafter, the present invention will be described with reference to the accompanying drawings.

상기한 목적을 달성하기 위한 본 발명의 제조방법은: 분무성형의 제조방법을 이용하여 알루미늄 합금재의 실린더 라이너를 제조하는 단계(S1)와, 이 알루미늄 합금재의 실린더 라이너를 실린더 블록 주조용 금형 내에 설치하는 단계(S2)와, 이 금형 내로 알루미늄 합금 용탕을 고압 사출하여 실린더 블록을 주조하는 단계(S3)를 포함하여 이루어진 것을 특징으로 한다.The manufacturing method of the present invention for achieving the above object is: a step (S1) of manufacturing a cylinder liner of aluminum alloy material using a manufacturing method of spray molding, and installing the cylinder liner of the aluminum alloy material in a mold for casting cylinder block And a step (S3) of casting the cylinder block by high pressure injection of the molten aluminum alloy into the mold.

본 발명의 바람직한 실시예에서, 상기 분무성형법을 이용한 실린더 라이너 제조단계(S1)는 알루미늄 합금을 용해시켜 필요한 온도까지 승온시킨 알루미늄 합금 용탕을 분무성형장치의 용탕 오리피스를 통해 회전기판에 분무하고, 이를 봉형으로 적층시켜 알루미늄 합금의 빌렛을 제작한 후, 이 봉형의 알루미늄 합금 빌렛을 소정의 내경을 가지는 튜브형으로 압출가공하고, 이를 소정의 길이로 절단가공하여 실린더 라이너를 완성시키는 것임을 특징으로 한다.In a preferred embodiment of the present invention, the cylinder liner manufacturing step (S1) using the spray molding method is to spray the aluminum alloy molten aluminum melted aluminum alloy to the required temperature to the rotating substrate through the molten orifice of the spray molding apparatus, this After laminating in a rod shape to produce an aluminum alloy billet, the rod-shaped aluminum alloy billet is extruded into a tubular shape having a predetermined inner diameter, and cut into a predetermined length, thereby completing a cylinder liner.

이하, 첨부한 도면을 참조하여 본 발명을 좀더 상세히 설명하면 다음과 같다.Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

첨부한 도 1은 본 발명에 따른 실린더 블록 제조방법을 나타내는 순서도로서, 이에 도시한 바와 같이, 본 발명은 실린더 블록의 보어 내면에 설치되는 실린더 라이너를 알루미늄 합금재를 재질로 하여 분무성형의 제조방법으로 제작하고, 이를 실린더 블록 주조를 위한 금형 내에 설치한 후, 다이캐스팅 주조방법을 이용하여 알루미늄 합금의 실린더 블록을 사출성형하는 실린더 블록 제조방법에 관한 것이다.1 is a flow chart illustrating a method for manufacturing a cylinder block according to the present invention. As shown in the drawing, the present invention provides a method for manufacturing spray molding using an aluminum alloy material of a cylinder liner installed on an inner surface of a bore of a cylinder block. The present invention relates to a cylinder block manufacturing method for injection molding an aluminum alloy cylinder block by using a die casting casting method after installing the same in a mold for cylinder block casting.

즉, 다이캐스팅 주조에 의해 제조되는 실린더 블록과 분무성형법에 의해 제조되는 실린더 라이너의 재질을 동일 재질로 하여, 실린더 블록 주조시 열팽창계수 차에 기인한 실린더 블록의 보어 내면과 실린더 라이너의 외주면간 발생되는 밀착성 문제를 해소할 수 있게 한 것이다.That is, the cylinder block produced by die casting casting and the cylinder liner manufactured by the spray molding method are made of the same material, and the gap between the bore inner surface of the cylinder block and the outer circumferential surface of the cylinder liner caused by the difference in coefficient of thermal expansion during cylinder block casting is generated. The adhesion problem can be solved.

이하, 본 발명의 제조방법을 좀더 상세히 설명하면, 본 발명의 제조방법은 분무성형(spray forming)의 제조방법을 이용하여 알루미늄 합금재의 실린더 라이너를 제조하는 단계(S1)와, 이 알루미늄 합금재의 실린더 라이너를 실린더 블록의 주조를 위한 금형 내에 설치하는 단계(S2)와, 고압의 다이캐스팅 주조방법을 이용하여 실린더 블록을 주조하는 단계(S3)를 포함하여 이루어진다.Hereinafter, the manufacturing method of the present invention in more detail, the manufacturing method of the present invention using the manufacturing method of spray forming (spray forming) step of producing a cylinder liner of aluminum alloy material (S1), and the cylinder of this aluminum alloy material And installing the liner in a mold for casting the cylinder block (S2), and casting the cylinder block using a high pressure die casting casting method (S3).

여기서, 상기 알루미늄 합금재의 실린더 라이너 제조방법은 분무성형법이며, 이 분무성형법을 이용하여 실린더 라이너를 제조하는 과정을 좀더 상세히 설명하면 다음과 같다.Here, the manufacturing method of the cylinder liner of the aluminum alloy material is a spray molding method, and the process of manufacturing the cylinder liner using the spray molding method will be described in more detail as follows.

먼저, 알루미늄 합금을 용해로에서 용해시킨 후 필요한 온도까지 승온시키고, 용융된 알루미늄 합금, 즉 알루미늄 합금 용탕을 분무성형장치의 용탕 오리피스를 통해 회전기판에 분무하되, 분무된 소재를 봉형으로 적층시켜 알루미늄 합금의 빌렛을 제작한다.First, the aluminum alloy is dissolved in a melting furnace and then heated up to a required temperature, and the molten aluminum alloy, that is, aluminum alloy molten metal is sprayed onto the rotating substrate through the molten orifice of the spray molding apparatus, and the sprayed material is laminated in a rod to form an aluminum alloy. To make a billet.

여기서, 상기 분무성형장치는 용탕 오리피스를 통해 중력에 의해 하강하는 용탕에 가스분사노즐을 통해 공급되는 질소 등의 고속분사가스를 충돌시켜 미세한 용탕 액적을 형성시키고, 이 용탕 액적이 기판 위에 적층되도록 하는 성형장치이다.Here, the spray molding apparatus forms a fine molten liquid droplets by colliding high-speed injection gas such as nitrogen supplied through a gas spray nozzle to a molten metal descended by gravity through a molten orifice, and allowing the molten liquid droplets to be stacked on a substrate. It is a molding apparatus.

이후, 상기 봉형의 알루미늄 합금 빌렛을 소정의 내경을 가지는 튜브형으로 압출가공한 후, 소정의 길이로 절단가공하여 실린더 라이너를 완성시키게 된다.Thereafter, the rod-shaped aluminum alloy billet is extruded into a tubular shape having a predetermined inner diameter, and then cut into a predetermined length to complete a cylinder liner.

여기서, 분무성형법을 이용하여 제조된 알루미늄 합금재의 실린더 라이너는 다이캐스팅 주조방법을 이용하여 제조되는 동일 재질의 실린더 블록에 비해 큰 경도를 가지므로 피스톤과의 마찰 및 마모에 유리하다.Here, the cylinder liner of the aluminum alloy material manufactured using the spray molding method has a greater hardness than the cylinder block of the same material manufactured using the die casting casting method, which is advantageous for friction and wear with the piston.

본 발명의 제조방법에 의해 실린더 블록을 완성하기 위해서는, 상기와 같이 알루미늄 합금재로 제조된 실린더 라이너를 실린더 블록 주조시 사용되는 다이캐스팅 머신의 금형 내에 설치한 후, 다이캐스팅 머신을 통해 금형 내 캐비티로 알루미늄 합금 용탕을 고압으로 사출한다.In order to complete the cylinder block by the manufacturing method of the present invention, a cylinder liner made of an aluminum alloy material as described above is installed in a die of a die casting machine used for casting the cylinder block, and then aluminum is used as a cavity in the die through the die casting machine. The molten alloy is injected at high pressure.

이때, 용탕을 소정의 온도구간(약, 670 ~ 680℃)으로 유지시킨 채 캐비티 내로 주입하게 되며, 이후에 주입된 용탕을 응고시켜 탈형시키면, 분무성형법을 이용하여 제조된 동일 재질의 실린더 라이너가 설치된 알루미늄 합금재의 실린더 블록이 완성된다.In this case, the molten metal is injected into the cavity while maintaining the molten metal at a predetermined temperature range (about 670 to 680 ° C.). After the molten metal is solidified and demolded, the cylinder liner of the same material manufactured using the spray molding method is The cylinder block of the aluminum alloy material installed is completed.

이상에서 상술한 바와 같이, 본 발명에 따른 엔진용 실린더 블록 제조방법에 의하면, 분무성형법을 이용하여 제조되는 동일 재질의 실린더 라이너가 설치되므로, 소재간 밀착성이 향상됨과 동시에 열팽창계수의 차이로 발생하던 종래의 밀착성 문제를 해소할 수 있고, 이에 따라 실린더 블록 주조시 결함발생을 방지할 수 있게 된다.As described above, according to the method for manufacturing a cylinder block for an engine according to the present invention, since the cylinder liner made of the same material manufactured by the spray molding method is installed, the adhesion between materials is improved and the difference in coefficient of thermal expansion occurs. The conventional adhesiveness problem can be solved, thereby preventing the occurrence of defects in the casting of the cylinder block.

또한, 주철 라이너에 비해 피스톤과의 마찰이 저감될 수 있어 출력향상 및 연비개선의 효과가 있으며, 기존 주철 라이너에 비해 중량을 저감시킬 수 효과가 있다.In addition, the friction with the piston can be reduced compared to the cast iron liner has the effect of improving the output and fuel economy, it is possible to reduce the weight compared to the existing cast iron liner.

Claims (2)

분무성형의 제조방법을 이용하여 알루미늄 합금재의 실린더 라이너를 제조하는 단계(S1)와, 이 알루미늄 합금재의 실린더 라이너를 실린더 블록 주조용 금형 내에 설치하는 단계(S2)와, 이 금형 내로 알루미늄 합금 용탕을 고압 사출하여 실린더 블록을 주조하는 단계(S3)를 포함하여 이루어진 것을 특징으로 하는 엔진용 실린더 블록 제조방법.A step (S1) of manufacturing a cylinder liner made of an aluminum alloy material using a manufacturing method of spray molding, a step (S2) of installing the cylinder liner made of the aluminum alloy material in a mold for casting a cylinder block, and a molten aluminum alloy into the mold A cylinder block manufacturing method for an engine, comprising the step of casting a cylinder block by high-pressure injection (S3). 제 1 항에 있어서, 상기 분무성형법을 이용한 실린더 라이너 제조단계(S1)는 알루미늄 합금을 용해시켜 필요한 온도까지 승온시킨 알루미늄 합금 용탕을 분무성형장치의 용탕 오리피스를 통해 회전기판에 분무하고, 이를 봉형으로 적층시켜 알루미늄 합금의 빌렛을 제작한 후, 이 봉형의 알루미늄 합금 빌렛을 소정의 내경을 가지는 튜브형으로 압출가공하고, 이를 소정의 길이로 절단가공하여 실린더 라이너를 완성시키는 것임을 특징으로 하는 엔진용 실린더 블록 제조방법.According to claim 1, wherein the cylinder liner manufacturing step (S1) using the spray molding method is to spray the aluminum alloy molten aluminum dissolved in the aluminum alloy and heated up to the required temperature to the rotating substrate through the molten orifice of the spray molding apparatus, it is a rod-shaped After laminating to produce an aluminum alloy billet, the rod-shaped aluminum alloy billet is extruded into a tubular shape having a predetermined inner diameter, and cut into a predetermined length to complete the cylinder liner. Manufacturing method.
KR10-2001-0054575A 2001-09-05 2001-09-05 Manufacturing method of cylinder block for engine KR100427281B1 (en)

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Cited By (4)

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KR100667415B1 (en) * 2005-07-05 2007-01-10 현대모비스 주식회사 High pressure hollow casting apparatus and hollow casting method thereof
KR100828803B1 (en) * 2006-08-11 2008-05-09 현대자동차주식회사 Method for manufacturing aluminium cylinder block with aluminium liner
KR100836309B1 (en) * 2007-05-22 2008-06-09 현대자동차주식회사 Manufacturing method for cylinder-liner of vehicle
KR101685374B1 (en) * 2015-06-05 2016-12-13 아주스틸 주식회사 Recycling Method of Inferior Engine Block in Continuous Casting Line

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KR100853071B1 (en) 2006-12-27 2008-08-19 대림기업 주식회사 Manufacturing Method Of Aluminum Cylinder Block

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JPS61199568A (en) * 1985-02-28 1986-09-04 Toyota Motor Corp Production of cylinder liner
JPH02295664A (en) * 1989-05-10 1990-12-06 Mazda Motor Corp Manufacture of aluminum alloy-made sliding member
JP3128041B2 (en) * 1994-05-27 2001-01-29 スズキ株式会社 Cylinder block and its manufacturing method
KR20030016696A (en) * 2001-08-21 2003-03-03 현대자동차주식회사 Manufacturing method of cylinder block for engine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100667415B1 (en) * 2005-07-05 2007-01-10 현대모비스 주식회사 High pressure hollow casting apparatus and hollow casting method thereof
KR100828803B1 (en) * 2006-08-11 2008-05-09 현대자동차주식회사 Method for manufacturing aluminium cylinder block with aluminium liner
KR100836309B1 (en) * 2007-05-22 2008-06-09 현대자동차주식회사 Manufacturing method for cylinder-liner of vehicle
KR101685374B1 (en) * 2015-06-05 2016-12-13 아주스틸 주식회사 Recycling Method of Inferior Engine Block in Continuous Casting Line

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