KR20090116961A - Cylinder block casting method - Google Patents
Cylinder block casting method Download PDFInfo
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- KR20090116961A KR20090116961A KR1020080042797A KR20080042797A KR20090116961A KR 20090116961 A KR20090116961 A KR 20090116961A KR 1020080042797 A KR1020080042797 A KR 1020080042797A KR 20080042797 A KR20080042797 A KR 20080042797A KR 20090116961 A KR20090116961 A KR 20090116961A
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- liner
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- liner insert
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- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000005266 casting Methods 0.000 title claims abstract description 17
- 229910052751 metal Inorganic materials 0.000 claims abstract description 10
- 239000002184 metal Substances 0.000 claims abstract description 10
- 239000004576 sand Substances 0.000 claims abstract description 4
- 238000001816 cooling Methods 0.000 claims description 11
- 230000008034 disappearance Effects 0.000 claims description 5
- 238000007711 solidification Methods 0.000 claims description 5
- 230000008023 solidification Effects 0.000 claims description 5
- 239000000498 cooling water Substances 0.000 claims description 4
- 239000006260 foam Substances 0.000 abstract 4
- 238000007669 thermal treatment Methods 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 8
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 229910001018 Cast iron Inorganic materials 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000003110 molding sand Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 229920006328 Styrofoam Polymers 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 210000001787 dendrite Anatomy 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000008261 styrofoam Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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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
- B22D23/00—Casting processes not provided for in groups B22D1/00 - B22D21/00
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes
- B22C7/02—Lost patterns
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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
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/001—Continuous casting of metals, i.e. casting in indefinite lengths of specific alloys
- B22D11/003—Aluminium alloys
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D21/00—Casting non-ferrous metals or metallic compounds so far as their metallurgical properties are of importance for the casting procedure; Selection of compositions therefor
- B22D21/02—Casting exceedingly oxidisable non-ferrous metals, e.g. in inert atmosphere
- B22D21/04—Casting aluminium or magnesium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/04—Influencing the temperature of the metal, e.g. by heating or cooling the mould
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
Description
본 발명은 소실모형(Lost Form)을 이용한 라이너 일체형 실린더 블록 주조방법에 관한 것이다.The present invention relates to a liner integrated cylinder block casting method using a Lost Form.
실린더 블록은 엔진의 뼈대를 이루는 부품으로서 연료 폭발시 생성되는 압력과 열에 견딜수 있어야 한다.The cylinder block is the building block of the engine and must withstand the pressure and heat generated during the fuel explosion.
이러한 실린더 블록은 주로 주철이나 알루미늄 합금으로 제작되는데, 통상적으로 알루미늄 실린더 블록의 경우, 실린더 보어면의 마모 방지를 위해 주철로 제작된 원통형의 라이너가 실린더 보어 내부에 설치된다. 라이너는 실린더 블록을 제조할 때 함께 주조되거나, 실린더 블록 제조 후 실린더에 압입된다.Such cylinder blocks are mainly made of cast iron or aluminum alloy. In the case of aluminum cylinder blocks, a cylindrical liner made of cast iron is installed inside the cylinder bore to prevent wear of the cylinder bore surface. The liner is cast together when producing the cylinder block, or is pressed into the cylinder after the cylinder block is manufactured.
도 1 및 도 2를 참조하여 소실모형 주조법을 이용한 실린더 블록 제조방법을 살펴본다.With reference to Figures 1 and 2 looks at the cylinder block manufacturing method using the burnout model casting method.
먼저, 도 1을 참조하여 소실모형 제작과정을 살펴보면, 이형된 상태의 알루미늄 금형의 중공 형성부 상에 발포재를 배치하고 금형을 합형한 다음, 발포재를 발포시켜 소실모형을 제작한다. 서로 합형된 금형의 내부에는 실린더 블록 형상의 공간이 마련되며, 금형의 중공 형성부는 소실모형에 중공부를 형성시킨다. 소실모 형은 주로 스티로폼 재질(폴리스티렌)로 제작된다.First, referring to FIG. 1, the process of producing a burnt-out model is performed by arranging the foamed material on the hollow-formed part of the aluminum mold in the demolded state, molding the mold, and foaming the foamed material to produce the burnt-out model. A space formed in a cylinder block shape is provided in the molds, which are integrated with each other, and the hollow forming part of the mold forms a hollow part in the vanishing model. The burnout model is mainly made of styrofoam material (polystyrene).
다음으로, 도 2를 참조하여 소실모형을 이용한 실린더 블록 제작과정을 살펴보면, 주형 상자 내부에 상기의 소실모형을 배치한 후, 이러한 주형 상자 내부에 주물사를 충진하고 소실모형의 탕구를 통해 알루미늄 용탕을 주입한다. 이 과정에서 소실모형은 용탕으로 대체되며, 이후 용탕을 응고시켜 제품을 취출하고 탕구를 절단하면 실린더 블록에 제작된다. 이러한 실린더 블록의 실린더 보어에는 원통 형상의 라이너가 압입되어 완제품으로 제작되는 것이다.Next, referring to FIG. 2, a process of manufacturing a cylinder block using the burnout model is described below. After placing the burnt-out model in the mold box, the molding sand is filled in the mold box and the molten aluminum is melted through the hot-drain ball. Inject. In this process, the burnout model is replaced by the molten metal. After the solidification of the molten metal, the product is taken out and the molten metal is cut and manufactured in the cylinder block. Cylindrical liners are press-fitted into the cylinder bore of the cylinder block to be manufactured as a finished product.
그러나, 위와 같은 종래의 소실모형을 이용한 실린더 블록 제조방법은, 실린더 블록 제작 후 별도로 실린더 보어 내부로 라이너를 압입하는 공정 및 이러한 압입 공정을 위해 라이너 및 보어면을 가공하는 공정을 필요로 하므로, 라이너 일체형 실린더 제조방법에 비하여 효율성이 상당히 떨어진다. 또한, 주조 과정 중 냉각속도를 조절할 수 없어 제품의 미세조직이 조대해지고, 따라서 물성 개선을 위하여 추가적인 열처리를 해야하는 문제점이 있다.However, the above-described method for manufacturing a cylinder block using a conventional vanishing model requires a process of pressing the liner into the cylinder bore separately after the cylinder block is manufactured and a process of processing the liner and the bore surface for such a press-fitting process. The efficiency is considerably lower than the one-piece cylinder manufacturing method. In addition, the cooling rate can not be adjusted during the casting process, the microstructure of the product is coarse, there is a problem that additional heat treatment to improve the physical properties.
본 발명은 상술한 바와 같은 문제점을 해결하기 위하여 제안된 것으로, 소실모형을 이용하되 라이너와 실린더 블록을 일체로 제작할 수 있는 실린더 블록 주조방법을 제공함을 목적으로 한다.The present invention has been proposed to solve the above problems, and an object of the present invention is to provide a cylinder block casting method that can produce a liner and a cylinder block integrally while using a burnout model.
또한, 제품 냉각속도의 조절을 통해 별도의 열처리 공정 없이도 미세조직이 치밀한 고강도의 실린더 블록을 제작할 수 있는 실린더 블록 주조방법을 제공함을 목적으로 한다.In addition, an object of the present invention is to provide a method for casting a cylinder block capable of manufacturing a high-strength cylinder block having a fine structure without a separate heat treatment process by controlling a product cooling rate.
상기의 목적을 달성하기 위한 본 발명에 따른 실린더 블록 주조방법은, 라이너 인서트가 돌출 형성된 금형을 준비하는 제1과정; 상기 라이너 인서트 상에 실린더 블록 형상의 소실모형을 라이너와 함께 설치하는 제2과정; 상기 금형을 베이스로 하는 주형 상자를 설치하는 제3과정; 상기 주형 상자 내에 주물사를 충진하고 소실모형에 용탕을 주입하는 제4과정; 및 상기 주형 상자 내에서 응고된 제품을 취출하는 제5과정;을 포함한다.Cylinder block casting method according to the present invention for achieving the above object, the first step of preparing a mold with a liner insert protruding; A second step of installing a cylinder block-shaped disappearance model together with the liner on the liner insert; Installing a mold box based on the mold; A fourth step of filling the foundry sand into the mold box and injecting molten metal into the disappearance model; And a fifth step of taking out the product solidified in the mold box.
상기 제2과정은, 라이너를 라이너 인서트에 부분 삽입한 후 라이너 위에서 소실모형을 조립하면서 소실모형을 라이너 인서트에 설치하는 과정으로 이루어질 수 있다.The second process may be performed by partially inserting the liner into the liner insert and then installing the burnout model to the liner insert while assembling the burnout model on the liner.
또한, 상기 금형에는 냉각채널이 형성되며, 이 냉각채널에 공급되는 냉각수를 이용하여 제품의 응고 속도를 조절할 수 있다.In addition, the cooling channel is formed in the mold, it is possible to adjust the solidification rate of the product by using the cooling water supplied to the cooling channel.
상술한 바와 같은 실린더 블록 주조방법에 따르면, 소실모형을 이용하여 실린더 블록을 라이너와 일체로 제작할 수 있다. 따라서, 소실모형 주조공정이 제공하는 제품 형상 설계의 자유도 및 치수 정밀도의 혜택을 모두 누릴 수 있다.According to the cylinder block casting method as described above, the cylinder block can be manufactured integrally with the liner using the burnout model. Therefore, it is possible to enjoy both the degree of freedom and the dimensional accuracy of the product shape design provided by the burnout model casting process.
또한, 냉각채널을 통해 공급되는 냉각수의 공급속도/양의 조절을 통해, 제품의 냉각속도를 조절할 수 있고, 이를 통해 미세조직이 치밀한 고강도의 실린더 블록을 제작할 수 있다.In addition, by controlling the supply rate / amount of the cooling water supplied through the cooling channel, it is possible to adjust the cooling rate of the product, through which a high-strength cylinder block with a fine structure can be produced.
이하에서는 첨부된 도면을 참조하여 본 발명의 바람직한 실시예에 따른 실린더 블록 주조방법에 대하여 살펴본다.Hereinafter, with reference to the accompanying drawings looks at with respect to the cylinder block casting method according to a preferred embodiment of the present invention.
도 3에는 실시예에 따른 실린더 블록 주조공정이 도시되어 있다.3 illustrates a cylinder block casting process according to an embodiment.
주조공정에 사용되는 소실모형은 앞서 설명된 종래기술 및 기타의 공지기술에 따라 미리 제작된다. 소실모형은 용탕의 주입을 위한 탕구를 가지며 실린더 보어에 해당하는 중공부를 갖는다.The burnout model used in the casting process is prepared in advance according to the above-described prior art and other well-known techniques. The burnout model has a spout for pouring molten metal and a hollow part corresponding to the cylinder bore.
주물사가 채워지는 주형 상자의 하부에는 라이너 인서트가 상방향 돌출 형성된 금형이 설치된다. 이러한 금형의 라이너 인서트 상에 라이너를 부분 삽입하고, 이렇게 설치된 라이너 위로부터 중공부를 갖는 소실모형을 조립한다. 즉, 소실모형의 중공부 내측에 라이너의 상단이 배치되도록 한 후 소실모형을 가압하면, 소실모형의 중공부 내부로 라이너가 압입됨과 아울러 소실모형의 중공부가 라이너 인서트에 끼워져 금형 상에 설치된다. 한편, 금형의 저부에는 냉각채널이 형성되어 있다.A mold having a liner insert protruding upward is installed at the bottom of the mold box in which the molding sand is filled. The liner is partially inserted onto the liner insert of this mold, and the vanishing model having the hollow portion is assembled from the thus installed liner. That is, when the upper end of the liner is arranged inside the hollow part of the missing model and presses the missing model, the liner is press-fitted into the hollow part of the missing model and the hollow part of the missing model is fitted onto the liner insert to be installed on the mold. On the other hand, a cooling channel is formed at the bottom of the mold.
위와 같이 금형 상에 소실모형을 설치한 후, 금형 주변에 주형 상자를 설치한다. 주형 상자는 용탕 주입구를 갖는 박스 형태로서, 주형 상자의 저면은 금형으로 대체된다. 다음으로, 이러한 주형 상자 내부로 주물사를 충진하고 알루미늄 용탕을 소실모형의 탕구를 통하여 주입한다. 용탕의 응고는 금형으로 인하여 종래 보다 촉진된다. 그러나, 금형의 냉각채널로 공급되는 냉각수 속도 또는 양의 조절을 통하여 용탕의 응고속도를 적절히 조절하는 것이 바람직하다. 주형 상자 내에서 응고된 제품을 취출하여 탕구를 절단하면, 라이너 일체형의 실린더 블록이 완성된다.After the burnout model is installed on the mold as above, a mold box is installed around the mold. The mold box is in the form of a box with a molten metal inlet, and the bottom of the mold box is replaced by a mold. Next, the foundry sand is filled into the mold box, and the molten aluminum is injected through the boiling port of the burnout model. Solidification of the molten metal is more accelerated than before due to the mold. However, it is preferable to appropriately adjust the solidification rate of the molten metal by controlling the rate or amount of cooling water supplied to the cooling channel of the mold. When the solidified product is taken out in the mold box and the hot water holes are cut, the liner-integrated cylinder block is completed.
도 4a와 도 4b을 참조하여, 종래 주조공정에 따라 제작된 실린더 블록과 상기 실시예에 따라 제작된 실린더 블록의 미세조직을 비교해 본다. 도 4a에서 보듯이, 종래 주조공정에 따라 제작된 블록의 미세조직의 경우 초정 알파의 크기가 크고 수지상정 간의 거리가 크나, 실시예에 따라 제작된 실린더 블록의 미세조직의 경우 크기 및 거리가 작다. 금형 냉각을 통한 제품 미세조직의 조절이 가능하여, 고강도의 라이너 일체형 실린더 블록을 얻을 수 있다.4A and 4B, a microstructure of a cylinder block manufactured according to the conventional casting process and a cylinder block manufactured according to the embodiment will be compared. As shown in Figure 4a, in the case of the microstructure of the block manufactured according to the conventional casting process, the size of the initial alpha is large and the distance between the dendrite is large, but the size and distance of the microstructure of the cylinder block produced according to the embodiment is small . It is possible to control the product microstructure through the cooling of the mold, it is possible to obtain a high-strength liner integrated cylinder block.
이상, 본 발명의 특정 실시예에 관하여 도시하고 설명하였지만, 본 발명의 기술분야에서 통상의 지식을 가진 자라면 하기의 특허 청구의 범위에 기재된 본 발명의 사상 및 영역으로부터 벗어나지 않는 범위 내에서 본 발명을 다양하게 수정 및 변경시킬 수 있음이 이해될 필요가 있다.While specific embodiments of the present invention have been shown and described, those of ordinary skill in the art will appreciate that the present invention may be made without departing from the spirit and scope of the invention as set forth in the claims below. It is to be understood that various modifications and changes can be made.
도 1은 종래의 소실모형 제작과정을 도시한 도면,1 is a view showing a conventional vanishing model manufacturing process,
도 2는 종래의 소실모형을 이용한 실린더 블록 제조공정을 도시한 도면,2 is a view showing a cylinder block manufacturing process using a conventional disappearance model,
도 3은 본 발명의 실시예에 따른 소실모형을 이용한 블록 제조공정을 도시한 도면,3 is a view showing a block manufacturing process using a burnout model according to an embodiment of the present invention,
도 4a는 본 발명의 실시예에 따라 제조된 실린더 블록의 미세조직 사진,4a is a microstructure photograph of a cylinder block manufactured according to an embodiment of the present invention,
도 4b는 도 4a와의 비교를 위한 사진으로, 종래 기술에 따라 제조된 실린더 블록의 미세조직 사진이다.Figure 4b is a photograph for comparison with Figure 4a, a microstructure photograph of a cylinder block prepared according to the prior art.
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|---|---|---|---|
| KR1020080042797A KR20090116961A (en) | 2008-05-08 | 2008-05-08 | Cylinder block casting method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020080042797A KR20090116961A (en) | 2008-05-08 | 2008-05-08 | Cylinder block casting method |
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| KR20090116961A true KR20090116961A (en) | 2009-11-12 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101416380B1 (en) * | 2012-12-17 | 2014-07-09 | 현대자동차 주식회사 | Manufacturing method and system of cylinder block for vehicle |
| KR20160150345A (en) | 2015-06-22 | 2016-12-30 | 주식회사 금아하이드파워 | Manufacturing method of cylinder block |
-
2008
- 2008-05-08 KR KR1020080042797A patent/KR20090116961A/en not_active Ceased
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101416380B1 (en) * | 2012-12-17 | 2014-07-09 | 현대자동차 주식회사 | Manufacturing method and system of cylinder block for vehicle |
| KR20160150345A (en) | 2015-06-22 | 2016-12-30 | 주식회사 금아하이드파워 | Manufacturing method of cylinder block |
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