JPS6338257B2 - - Google Patents
Info
- Publication number
- JPS6338257B2 JPS6338257B2 JP26389284A JP26389284A JPS6338257B2 JP S6338257 B2 JPS6338257 B2 JP S6338257B2 JP 26389284 A JP26389284 A JP 26389284A JP 26389284 A JP26389284 A JP 26389284A JP S6338257 B2 JPS6338257 B2 JP S6338257B2
- Authority
- JP
- Japan
- Prior art keywords
- cylinder
- core
- molten metal
- cylinder block
- cavity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000000463 material Substances 0.000 claims description 43
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- 229910000838 Al alloy Inorganic materials 0.000 claims description 13
- 238000005266 casting Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 6
- 229910001018 Cast iron Inorganic materials 0.000 claims description 5
- 238000000137 annealing Methods 0.000 claims description 5
- 238000003754 machining Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 description 45
- 239000002184 metal Substances 0.000 description 45
- 238000000465 moulding Methods 0.000 description 11
- 238000009434 installation Methods 0.000 description 10
- 238000004891 communication Methods 0.000 description 7
- 230000007246 mechanism Effects 0.000 description 7
- 230000002265 prevention Effects 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 6
- 239000007789 gas Substances 0.000 description 4
- 230000003014 reinforcing effect Effects 0.000 description 4
- 238000007796 conventional method Methods 0.000 description 3
- 230000001174 ascending effect Effects 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
Classifications
-
- 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
- F02F1/02—Cylinders; Cylinder heads having cooling means
- F02F1/10—Cylinders; Cylinder heads having cooling means for liquid cooling
- F02F1/108—Siamese-type cylinders, i.e. cylinders cast together
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/32—Controlling equipment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/0009—Cylinders, pistons
-
- 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
- F02F7/00—Casings, e.g. crankcases or frames
- F02F7/0002—Cylinder arrangements
- F02F7/0007—Crankcases of engines with cylinders in line
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B75/00—Other engines
- F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
- F02B75/18—Multi-cylinder engines
- F02B2075/1804—Number of cylinders
- F02B2075/1816—Number of cylinders four
-
- 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
- F02F1/02—Cylinders; Cylinder heads having cooling means
- F02F1/10—Cylinders; Cylinder heads having cooling means for liquid cooling
- F02F2001/106—Cylinders; Cylinder heads having cooling means for liquid cooling using a closed deck, i.e. the water jacket is not open at the block top face
-
- 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
- F02F2200/00—Manufacturing
- F02F2200/06—Casting
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Description
【発明の詳細な説明】
A 発明の目的
(1) 産業上の利用分野
本発明は、シリンダバレルに鋳鉄製スリーブを
鋳ぐるむと共に該シリンダバレルの外周に水ジヤ
ケツトを配設したアルミニウム合金製シリンダブ
ロツクの製造方法に関する。Detailed Description of the Invention A. Object of the Invention (1) Industrial Field of Application The present invention provides an aluminum alloy cylinder in which a cast iron sleeve is cast around the cylinder barrel and a water jacket is provided around the outer periphery of the cylinder barrel. This invention relates to a method for manufacturing blocks.
(2) 従来の技術
従来、前記シリンダブロツクは下記の方法によ
り製造されている。(2) Prior Art Conventionally, the cylinder block has been manufactured by the following method.
即ち、鋳型のキヤビテイにシリンダスリーブと
そのシリンダスリーブを囲繞する水ジヤケツト用
可崩壊性中子とを配設してアルミニウム合金溶湯
によりシリンダブロツク素材を鋳造する。次いで
その素材より堰、湯道等の不要部分を除去し、素
材に振動を与えることにより可崩壊性中子を崩壊
してその半分程度を素材より除去する。その後素
材を350℃以上で4時間程度加熱して中子に含有
される粘結剤を燃焼し、中子の残りの部分の崩壊
性を向上させる。 That is, a cylinder sleeve and a collapsible core for a water jacket surrounding the cylinder sleeve are disposed in a mold cavity, and a cylinder block material is cast using molten aluminum alloy. Next, unnecessary parts such as weirs and runners are removed from the material, and the material is vibrated to cause the collapsible core to collapse and about half of it is removed from the material. The material is then heated at 350°C or above for about four hours to burn off the binder contained in the core and improve the disintegration of the remaining part of the core.
上記加熱により素材のアルミニウム合金部分の
硬度が著しく低下し、シリンダヘツド接合面、ク
ランクジヤーナルの軸受ホルダ、クランクケース
のオイルパン接合面等に十分な硬度を保有させる
ことができなくなる。そこで素材にT6処理、即
ち素材を約500℃で約2時間加熱し、その後水冷
する熱処理を施して硬度の回復を図る。 The above-mentioned heating significantly reduces the hardness of the aluminum alloy portion of the material, making it impossible to maintain sufficient hardness in the cylinder head joint surface, crank journal bearing holder, crankcase oil pan joint surface, etc. Therefore, the material is subjected to T6 treatment, in which the material is heated at approximately 500°C for approximately 2 hours, and then water-cooled to restore its hardness.
さらに、素材に振動を与え中子の残りの部分を
崩壊して素材より除去し、次いで素材にばり取り
加工を施し、検査を経た後素材に所定の機械加工
を施すものである。 Furthermore, the material is vibrated to cause the remaining portion of the core to collapse and removed from the material, and then the material is deburred, and after inspection, the material is subjected to predetermined machining.
(3) 発明が解決しようとする問題点
しかしながら前記従来法の場合は、T6処理に
よつて素材のアルミニウム合金部分の硬度を向上
させることができるとしても、前記処理における
水冷工程でシリンダスリーブに不均一な応力が残
留して高精度なシリンダブロツクを得ることがで
きないという問題がある。(3) Problems to be Solved by the Invention However, in the case of the conventional method, even though the hardness of the aluminum alloy part of the material can be improved by the T6 treatment, the cylinder sleeve is damaged during the water cooling step in the treatment. There is a problem in that uniform stress remains and a highly accurate cylinder block cannot be obtained.
また二度の加熱工程を含むのでエネルギ消費量
が多く不経済であるといつた問題もある。 Furthermore, since it involves two heating steps, it consumes a lot of energy and is uneconomical.
本発明は上記に鑑み、常温下において中子の除
去を行い、また熱処理は歪取り程度にして高精度
なシリンダブロツクを経済的に製造し得る前記方
法を提供することを目的とする。 In view of the above, an object of the present invention is to provide a method capable of economically manufacturing a highly accurate cylinder block by removing the core at room temperature and performing heat treatment to the extent of removing distortion.
B 発明の構成
(1) 問題点を解決するための手段
本発明は鋳型のキヤビテイに前記シリンダスリ
ーブと該シリンダスリーブを囲繞する水ジヤケツ
ト用可崩壊性中子とを配設してアルミニウム合金
溶湯によりシリンダブロツク素材を鋳造する工程
と;常温下において前記中子を崩壊して前記シリ
ンダブロツク素材より除去する工程と、前記シリ
ンダブロツク素材に焼鈍処理を施す工程と;前記
シリンダブロツク素材に機械加工を施す工程と;
を用いることを特徴とする。B. Structure of the Invention (1) Means for Solving the Problems The present invention provides a method of disposing the cylinder sleeve and a collapsible core for a water jacket surrounding the cylinder sleeve in the cavity of a mold, and using the molten aluminum alloy. a step of casting the cylinder block material; a step of collapsing the core at room temperature and removing it from the cylinder block material; a step of subjecting the cylinder block material to annealing; and a step of machining the cylinder block material. Process and;
It is characterized by using
(2) 作 用
常温下において中子を崩壊しシリンダブロツク
素材より除去すると、その素材のアルミニウム合
金部分の硬度を低下することがない。したがつて
アルミニウム合金部分の硬度を回復させるための
T6処理が不要であり、単に前記素材に焼鈍処理
を施して歪取りを行うだけで高精度なシリンダブ
ロツクが得られる。(2) Effect When the core is disintegrated at room temperature and removed from the cylinder block material, the hardness of the aluminum alloy part of the material will not be reduced. Therefore, in order to restore the hardness of aluminum alloy parts,
T6 treatment is not required, and a highly accurate cylinder block can be obtained simply by annealing the material to remove distortion.
(3) 実施例
第1〜第3図は本発明により得られたサイアミ
ーズ型シリンダブロツクSを示し、それはアルミ
ニウム合金製シリンダブロツク本体2と、その本
体2に鋳ぐるまれた鋳鉄製シリンダスリーブ3と
よりなる。シリンダブロツク本体2は、直列に並
ぶ複数、図示例は4個のシリンダバレル11〜14
相互を結合してなるサイアミーズシリンダバレル
1と、そのサイアミーズシリンダバレル1を囲繞
する外壁部4と、外壁部4の下縁に連設されたク
ランクケース5とより構成され、各シリンダバレ
ル11〜14に前記シリンダスリーブ3が鋳ぐるま
れており、各シリンダスリーブ3によりシリンダ
ボア3aが形成される。(3) Embodiment Figures 1 to 3 show a Siamese-type cylinder block S obtained according to the present invention, which consists of an aluminum alloy cylinder block body 2, a cast iron cylinder sleeve 3 cast into the body 2, and a cylinder block S made of aluminum alloy. It becomes more. The cylinder block body 2 includes a plurality of cylinder barrels 1 1 to 1 4 arranged in series, four cylinder barrels in the illustrated example.
It is composed of a Siamese cylinder barrel 1 which is connected to each other, an outer wall part 4 surrounding the Siamese cylinder barrel 1, and a crankcase 5 connected to the lower edge of the outer wall part 4, and each cylinder barrel 1 1 - The cylinder sleeves 3 are cast into the cylinders 1 and 4 , and each cylinder sleeve 3 forms a cylinder bore 3a.
サイアミーズシリンダバレル1と外壁部4間に
は、サイアミーズシリンダバレル1の外周が臨む
水ジヤケツト6が形成される。その水ジヤケツト
6におけるシリンダヘツド側端部において、サイ
アミーズシリンダバレル1と外壁部4間は複数の
補強デツキ部8により部分的に連結され、相隣る
補強デツキ部8はシリンダヘツド側への連通口7
として機能する。これによりシリンダブロツクS
はクローズドデツキ型に構成される。 A water jacket 6 is formed between the Siamese cylinder barrel 1 and the outer wall portion 4, and the outer periphery of the Siamese cylinder barrel 1 is exposed to the water jacket 6. At the end of the water jacket 6 on the cylinder head side, the Siamese cylinder barrel 1 and the outer wall 4 are partially connected by a plurality of reinforcing deck parts 8, and the adjacent reinforcing deck parts 8 have communication ports to the cylinder head side. 7
functions as As a result, the cylinder block S
is constructed as a closed deck type.
第5〜第9図は、第4図に示すシリンダブロツ
ク素材Smの鋳造装置を示し、その装置は鋳型と
しての金型Mを備え、その金型Mは昇降自在な上
型9と、その上型9の下方に配設され、第5、第
6図において左右二つ割の第1および第2側型1
01,102ならびに第7図において左右二つ割の
第3および第4側型103,104と、各側型10
1〜104を摺動自在に載置する下型11とより構
成される。 5 to 9 show a casting device for the cylinder block material Sm shown in FIG. 4, and the device is equipped with a mold M as a casting mold. The first and second side molds 1 are disposed below the mold 9 and are divided into left and right halves in FIGS. 5 and 6.
0 1 , 10 2 and the third and fourth side molds 10 3 , 10 4 divided into left and right halves in FIG.
1 to 10 4 are slidably placed thereon.
上型9の下面には、各側型101〜104の上半
部と協働してサイアミーズシリンダバレル1およ
び外壁部4を成形するための第1キヤビテイC1
を画成する型締め用凹部12が形成され、その凹
部12と嵌合する型締め用凸部13が各側型10
1〜104の上面に突設される。 A first cavity C 1 is provided on the lower surface of the upper mold 9 for molding the Siamese cylinder barrel 1 and the outer wall portion 4 in cooperation with the upper half of each of the side molds 10 1 to 10 4 .
A mold clamping recess 12 is formed, and a mold clamping convex 13 that fits into the recess 12 is formed on each side of the mold 10.
1 to 10 4 protrudingly provided on the upper surface.
第7、第8図に示すように、下型11には溶解
炉(図示せず)よりアルミニウム合金よりなる溶
湯を受ける湯溜部14と、その湯溜部14に連通
する給湯シリンダ15と、その給湯シリンダ15
に摺合されるプランジヤ16と、湯溜部14より
2本に分岐して第1キヤビテイC1の長手方向に、
且つそれと略同一長さに亘つて延びる一対の湯道
17とが設けられる。また下型11は両湯道17
間において上方へ突出する成形ブロツク18を有
し、その成形ブロツク18は両側型101〜104
の下半部と協働してクランクケース5を成形する
ための第2キヤビテイC2を画成する。そのキヤ
ビテイC2の上端は前記第1キヤビテイC1に連通
し、また両側の下端は両湯道17に複数の堰19
を介して連通する。 As shown in FIGS. 7 and 8, the lower mold 11 includes a sump 14 that receives molten metal made of aluminum alloy from a melting furnace (not shown), and a hot water supply cylinder 15 that communicates with the sump 14. The hot water cylinder 15
The plunger 16 slides into the plunger 16, and the first cavity C1 branches into two parts from the sump 14 in the longitudinal direction of the first cavity C1 .
In addition, a pair of runners 17 are provided that extend over approximately the same length. Also, the lower mold 11 has both runners 17
It has a molding block 18 that protrudes upward between the two molds 10 1 to 10 4 .
A second cavity C2 for forming the crankcase 5 is defined in cooperation with the lower half of the crankcase. The upper end of the cavity C 2 communicates with the first cavity C 1 , and the lower ends on both sides have a plurality of weirs 19 connected to both runners 17 .
communicate via.
成形ブロツク18は、所定の間隔で形成された
背の高い4個のかまぼこ形第1成形部181と、
相隣る第1成形部181間および最外側の両第1
成形部181の外側に位置する凸字形第2成形部
182とよりなり、各第1成形部181はクランク
ピンおよびクランクアーム用回転空間20(第
2、第3図)を成形するために用いられ、第2成
形部182はクランクジヤーナルの軸受ホルダ2
1(第2、第3図)を成形するために用いられ
る。各堰19は第2成形部182に対応して設け
られており、第2キヤビテイC2の容量の大きな
部分に溶湯を早期に充填するようになつている。 The molding block 18 includes four tall semi-cylindrical first molding parts 181 formed at predetermined intervals;
Between adjacent first molded parts 18 1 and both outermost first molded parts 18 1
It consists of a convex second molding part 182 located outside the molding part 181, and each first molding part 181 is for molding a rotation space 20 for a crank pin and a crank arm (FIGS. 2 and 3). The second molded part 18 2 is used for the bearing holder 2 of the crank journal.
1 (Figures 2 and 3). Each weir 19 is provided corresponding to the second molding part 18 2 so that the large volume portion of the second cavity C 2 is quickly filled with molten metal.
両湯道17の断面積が湯溜部14側より湯道先
17aに向けて段階的に減少するように、湯道1
7底面は湯溜部14側より数段の上り階段状に形
成されている。各段部17bに連なる各立上がり
部17cは溶湯を各堰19にスムーズに導くこと
ができるように斜めに形成される。 The runners 17 are arranged such that the cross-sectional area of both runners 17 gradually decreases from the water reservoir 14 side toward the runner tip 17a.
The bottom surface of 7 is formed in the shape of several steps ascending from the trough portion 14 side. Each rising portion 17c connected to each step portion 17b is formed diagonally so that the molten metal can be smoothly guided to each weir 19.
このように湯道17の断面積を段階的に減少さ
せると、断面積の大きな部分では大量の溶湯を遅
い速度で堰19を通じて第2キヤビテイC2に充
填し、また断面積の小さな部分では少量の溶湯を
速い速度で堰19を通じて第2キヤビテイC2に
充填することができるので、そのキヤビテイC2
内では両側下端よりその全長に亘つて略均等に湯
面が上昇し、したがつて溶湯がキヤビテイC2内
で乱流を起こすことがなく、空気等のガスが溶湯
に巻き込まれることを防止して巣の発生を回避す
ることができる。また溶湯の充填作業が効率良く
行われるので、鋳造能率を向上させることができ
る。 When the cross-sectional area of the runner 17 is reduced stepwise in this way, a large amount of molten metal is filled into the second cavity C2 through the weir 19 at a slow speed in the large cross-sectional area, and a small amount is filled in the small cross-sectional area. can be filled into the second cavity C 2 through the weir 19 at a high speed, so that the cavity C 2
Inside the cavity, the melt level rises almost evenly over the entire length from the lower ends of both sides, so the molten metal does not cause turbulent flow within the cavity C2 , and gases such as air are prevented from being drawn into the molten metal. nests can be avoided. Further, since the molten metal filling operation is performed efficiently, casting efficiency can be improved.
第5、第6図に示すように各第1成形部181
の頂面には、鋳鉄製シリンダスリーブ3の内周面
と嵌合する位置決め突起22が突設され、その位
置決め突起22の中心には凹部23が形成され
る。また両側に位置する2つの第1成形部181
には、位置決め突起22の両側において第1成形
部181を貫通する貫通孔24が形成され、それ
ら貫通孔24に一対の仮設置ピン25がそれぞれ
摺合され、それら仮設置ピン25は、後述する水
ジヤケツト用可崩壊性中子の仮設置のために用い
られる。両仮設置ピン25の下端は、成形ブロツ
ク18の下方に配設された取付板26に固定され
る。その取付板26には2本の支持ロツド27が
挿通され、各支持ロツド27の下部と取付板26
の下面との間にはコイルばね28が縮設される。
型開き時には、取付板26は各コイルばね28の
弾発力を受けて各支持ロツド27先端のストツパ
27aに当接するまで上昇し、これにより各仮設
置ピン25の先端は第1成形部181頂面より突
出している。各仮設置ピン25の先端面には中子
の下縁と係合する凹部25aが形成される。 As shown in FIGS. 5 and 6, each first molding section 18 1
A positioning protrusion 22 that fits into the inner circumferential surface of the cast iron cylinder sleeve 3 is protruded from the top surface of the cylinder sleeve 3, and a recess 23 is formed in the center of the positioning protrusion 22. In addition, two first molded parts 18 1 located on both sides
A through hole 24 passing through the first molded part 18 1 is formed on both sides of the positioning protrusion 22 , and a pair of temporary installation pins 25 are slid into each of the through holes 24 , and the temporary installation pins 25 will be described later. Used for temporary installation of collapsible cores for water jackets. The lower ends of both temporary installation pins 25 are fixed to a mounting plate 26 disposed below the forming block 18. Two support rods 27 are inserted through the mounting plate 26, and the lower part of each support rod 27 and the mounting plate 26 are inserted into the mounting plate 26.
A coil spring 28 is compressed between the lower surface of the holder and the lower surface of the holder.
When the mold is opened, the mounting plate 26 receives the elastic force of each coil spring 28 and rises until it comes into contact with the stopper 27a at the tip of each support rod 27, so that the tip of each temporary installation pin 25 is attached to the first molded part 18 1 It protrudes from the top. A recess 25a that engages with the lower edge of the core is formed on the tip end surface of each temporary installation pin 25.
また両側に位置する2つの第1成形部181に
は、両貫通孔24間の二等分位置において第1成
形部181を貫通する貫通孔29が形成され、そ
の貫通孔29に下端を取付板26に固定された作
動ピン30が摺合される。型開き時には、作動ピ
ン30の先端は凹部23内に突出し、また型閉め
時には後述する拡径機構により押し下げられ、こ
れにより両仮設置ピン25を第1成形部181頂
面より引き込ませるようになつている。 Further, in the two first molded parts 18 1 located on both sides, a through hole 29 is formed that penetrates the first molded part 18 1 at a bisecting position between both through holes 24 , and the lower end is inserted into the through hole 29 . An operating pin 30 fixed to the mounting plate 26 is slid together. When the mold is opened, the tip of the operating pin 30 protrudes into the recess 23, and when the mold is closed, it is pushed down by a diameter expanding mechanism, which will be described later, so that both temporary pins 25 are retracted from the top surface of the first molding section 181 . It's summery.
第1および第2側型101,102における第1
キヤビテイC1を画成する壁部の中央部分には中
子を本設置するための中子受31が2個所宛設け
られている。各中子受31は中子の位置決めを行
う係合孔31aと、その開口部外周に形成されて
中子を挟持する挟持面31bとよりなる。 The first in the first and second side molds 10 1 , 10 2
In the central part of the wall defining the cavity C1 , two core holders 31 are provided for permanently installing the core. Each core receiver 31 includes an engagement hole 31a for positioning the core, and a clamping surface 31b formed around the outer periphery of the opening to clamp the core.
上型9の型締め用凹部12には、第1キヤビテ
イC1に連通して溶湯をオーバフロローさせるた
めの複数の第3キヤビテイC3および連通口7を
成形するための第4キヤビテイC4がそれぞれ開
口し、また上型9には各第3キヤビテイC3およ
び第4キヤビテイC4に連通する貫通孔32,3
3がそれぞれ形成される。 In the mold clamping recess 12 of the upper mold 9, there are a plurality of third cavities C3 communicating with the first cavity C1 to overflow the molten metal and a fourth cavity C4 for forming the communication port 7. The upper mold 9 has through holes 32, 3 which are open respectively and communicate with the third cavity C3 and the fourth cavity C4 .
3 are formed respectively.
それら貫通孔32,33には閉鎖ピン34,3
5がそれぞれ挿入され、それら閉鎖ピン34,3
5の上端は上型9の上方に配設される取付板36
に固定される。 The through holes 32 and 33 have closing pins 34 and 3.
5 are inserted, respectively, and the closing pins 34, 3
The upper end of 5 is a mounting plate 36 disposed above the upper mold 9.
Fixed.
各貫通孔32,34の、両キヤビテイC3,C4
に対する連通端から上方へ所定の長さに亘つて延
びる小径部32a,33aは各閉鎖ピン34,3
5と嵌合して第3キヤビテイC3および第4キヤ
ビテイC4を閉鎖し得るが、その外の部分の直径
は各閉鎖ピン34,35の直径よりも大きく、こ
れにより各閉鎖ピン34,35と各貫通孔32,
33間に空気通路37,38が形成される。 Both cavities C 3 and C 4 of each through hole 32 and 34
The small diameter portions 32a, 33a extend upwardly over a predetermined length from the communicating ends of the respective closing pins 34, 3.
5 to close the third cavity C 3 and the fourth cavity C 4 , the diameter of the outer portion thereof is larger than the diameter of each closing pin 34 , 35 , so that each closing pin 34 , 35 and each through hole 32,
Air passages 37 and 38 are formed between 33.
上型9の頂面と取付板36間には、油圧シリン
ダ39が介装され、その油圧シリンダ39の作動
により取付板36を昇降して各閉鎖ピン34,3
5により各小径部32a,33aを開閉するよう
になつている。40は取付板36の案内ロツドで
ある。 A hydraulic cylinder 39 is interposed between the top surface of the upper die 9 and the mounting plate 36, and the operation of the hydraulic cylinder 39 moves the mounting plate 36 up and down to close each closing pin 34, 3.
5 to open and close each small diameter portion 32a, 33a. 40 is a guide rod for the mounting plate 36.
上型9には、各シリンダバレル11〜14に鋳ぐ
るまれるシリンダスリーブ3を保持するための拡
径機構41が設けられ、その機構41は下記のよ
うに構成される。 The upper die 9 is provided with a diameter expanding mechanism 41 for holding the cylinder sleeve 3 cast into each of the cylinder barrels 1 1 to 1 4 , and the mechanism 41 is configured as follows.
上型9には、作動ピン30の延長軸線に中心線
を合致させた貫通孔42が形成され、その貫通孔
42に支持ロツド43が遊挿される。その支持ロ
ツド43の上端は上型9の頂面に立設されたブラ
ケツト44に固定され、またその下端に溶湯浸入
防止板45が固着される。溶湯浸入防止板45の
下面には、下型11における第1成形部181頂
面の凹部23に嵌合し得る凸部45aが形成され
る。 A through hole 42 whose center line coincides with the extension axis of the operating pin 30 is formed in the upper mold 9, and a support rod 43 is loosely inserted into the through hole 42. The upper end of the support rod 43 is fixed to a bracket 44 erected on the top surface of the upper mold 9, and a molten metal intrusion prevention plate 45 is fixed to the lower end. A convex portion 45 a that can fit into the concave portion 23 on the top surface of the first molded portion 18 1 in the lower mold 11 is formed on the lower surface of the molten metal intrusion prevention plate 45 .
中空の保持筒46は円形の外周面と、上部から
下部に向けて下り勾配のテーパ孔47を有し、上
型9から下方へ突出する支持ロツド43の下部は
保持筒46のテーパ孔47に遊挿され、その保持
筒46の上端面は上型9の凹部12に突設された
凸部48に当接し、また下端面は溶湯浸入防止板
45に当接する。第9図に示すように保持筒46
の周壁部にはその内周面および外周面より半径方
向に延びる複数のすり割溝49が交互に且つ円周
上等間隔に形成される。 The hollow holding cylinder 46 has a circular outer peripheral surface and a tapered hole 47 with a downward slope from the top to the bottom. The holding cylinder 46 is inserted loosely, and its upper end surface abuts a protrusion 48 protruding from the recess 12 of the upper mold 9, and its lower end surface abuts a molten metal intrusion prevention plate 45. As shown in FIG.
A plurality of slot grooves 49 extending radially from the inner circumferential surface and outer circumferential surface of the circumferential wall are formed alternately and at equal intervals on the circumference.
支持ロツド43には、保持筒46を拡径するた
めの中空状作動ロツド50が支持ロツド43の略
全長に亘つて摺合され、その作動ロツド50は保
持筒46のテーパ孔47に嵌合するテーパ部50
aと、そのテーパ部50aに連設されて上型9の
貫通孔42に摺合されると共に上型9より突出す
る真円部50bとよりなる。テーパ部50bには
複数のピン57が突設され、それらピン57は保
持筒46の上下方向に長いピン孔58に挿入さ
れ、これによりテーパ部50aの上下動を許容し
つつ保持筒46の回止めがなされる。 A hollow actuating rod 50 for expanding the diameter of the holding tube 46 is slid onto the supporting rod 43 over substantially the entire length of the supporting rod 43, and the actuating rod 50 has a tapered shape that fits into the tapered hole 47 of the holding tube 46. Part 50
a, and a perfectly circular portion 50b that is connected to the tapered portion 50a, slides into the through hole 42 of the upper mold 9, and projects from the upper mold 9. A plurality of pins 57 are protruded from the tapered portion 50b, and these pins 57 are inserted into pin holes 58 that are long in the vertical direction of the holding tube 46, thereby allowing the rotation of the holding tube 46 while allowing the vertical movement of the tapered portion 50a. A stop is made.
上型9の頂面には、油圧シリンダ51が固定さ
れ、その中空ピストン52の上端面および下端面
に突設された中空ピストンロツド531,532が
シリンダ本体54の上端壁および下端壁をそれぞ
れ貫通している。中空ピストン52および中空ピ
ストンロツド53を貫通する貫通孔55には作動
ロツド50の真円部50bが挿入され、その真円
部50bの環状溝に嵌めた抜止めストツパ561,
562を中空ピストンロツド531,532の上、
下端面にそれぞれ当接させて中空ピストン52に
より作動ロツド50を昇降するようになつてい
る。前記拡径機構41はシリンダブロツクSの各
シリンダバレル11〜14に対応して4機設けられ
る。 A hydraulic cylinder 51 is fixed to the top surface of the upper die 9, and hollow piston rods 53 1 and 53 2 projecting from the upper and lower end surfaces of the hollow piston 52 respectively touch the upper and lower end walls of the cylinder body 54. Penetrating. A true circular portion 50b of the actuating rod 50 is inserted into a through hole 55 passing through the hollow piston 52 and the hollow piston rod 53, and a stopper 56 1 to prevent removal is fitted into an annular groove of the circular portion 50b.
56 2 on the hollow piston rods 53 1 and 53 2 ,
The actuating rod 50 is raised and lowered by a hollow piston 52, which is brought into contact with the lower end surface. Four diameter expanding mechanisms 41 are provided corresponding to each of the cylinder barrels 11 to 14 of the cylinder block S.
第10、第11図は水ジヤケツト用可崩壊性中
子59を示し、その中子59は、シリンダブロツ
クSの4本のシリンダバレル11〜14に対応して
4本の円筒部601〜604を備えると共にそれら
の相隣るもの相互の重合する周壁を欠如させた中
子本体61と、水ジヤケツト6をシリンダヘツド
の水ジヤケツトに連通する連通口7および補強デ
ツキ部8を形成すべく、中子本体61の上端面に
突設された複数の突起62と、中子本体61のシ
リンダバレル配列方向両外側面、図示例は中間に
位置する2本の円筒部602,603の両外側面に
それぞれ突設された幅木63とより構成される。
各幅木63は中子本体61と一体の大径部63a
と、その端面に突設される小径部63bとより形
成される。中子59は、図示例においては、レジ
ンコーテツドサンドを用いて成形されている。 10 and 11 show a collapsible core 59 for a water jacket, and the core 59 has four cylindrical portions 60 1 corresponding to the four cylinder barrels 1 1 to 1 4 of the cylinder block S. - 60 4 , and a core body 61 which lacks the surrounding walls where the adjacent ones overlap with each other, a communication port 7 that communicates the water jacket 6 with the water jacket of the cylinder head, and a reinforcing deck part 8 are formed. In order to achieve this, a plurality of protrusions 62 protrude from the upper end surface of the core body 61, and two cylindrical portions 60 2 and 60 3 located in the middle on both outer surfaces of the core body 61 in the cylinder barrel arrangement direction. It is comprised of baseboards 63 protruding from both outer surfaces of the baseboard.
Each baseboard 63 has a large diameter portion 63a integrated with the core body 61.
and a small diameter portion 63b protruding from the end surface thereof. In the illustrated example, the core 59 is molded using resin coated sand.
次に前記鋳造装置によるシリンダブロツク素材
Smの鋳造作業について説明する。 Next, the cylinder block material is made by the casting machine.
I will explain the casting work of Sm.
先ず第5図に示すように、上型9を上昇させ、
また相対向する両側型101,102;103,1
04を互いに離間するように移動させて型開きを
行う。拡径機構41においては、各油圧シリンダ
51を作動させて中空ピストン52により作動ロ
ツド50を下降させ、テーパ部50aの下方移動
により保持筒46を縮径させておく。また上型9
上の油圧シリンダ39を作動させて取付板36を
上昇させ、これにより各閉鎖ピン34,35を第
3、第4キヤビテイC3,C4に連通する小径部3
2a,33aより離脱させる。さらに給湯シリン
ダ15内のプランジヤ16を下降させる。 First, as shown in FIG. 5, the upper mold 9 is raised,
Also, opposing both sides 10 1 , 10 2 ; 10 3 , 1
0 4 are moved apart from each other to open the mold. In the diameter expanding mechanism 41, each hydraulic cylinder 51 is operated to lower the actuating rod 50 using the hollow piston 52, and the diameter of the holding cylinder 46 is reduced by moving the tapered portion 50a downward. Also, upper mold 9
The upper hydraulic cylinder 39 is operated to raise the mounting plate 36, thereby opening the small diameter portion 3 that communicates each closing pin 34, 35 with the third and fourth cavities C3 , C4 .
2a and 33a. Furthermore, the plunger 16 in the hot water supply cylinder 15 is lowered.
略真円の鋳鉄製シリンダスリーブ3を各保持筒
46に遊嵌し、シリンダスリーブ3の上端開口を
上型9の凸部48に嵌合して閉鎖し、またシリン
ダスリーブ3の下端面を溶湯浸入防止板45の凸
部45a下端面に合致させると共に溶湯浸入防止
板45によりシリンダスリーブ3の下端開口を閉
鎖する。そして拡径機構41の油圧シリンダ51
を作動させ、その中空ピストン52により作動ロ
ツド50を上昇させる。これによりテーパ部50
aが上方へ移動するので保持筒46が拡径し、シ
リンダスリーブ3は拡径力を受けて保持筒46に
確実に保持される。 A substantially perfect circular cast iron cylinder sleeve 3 is loosely fitted into each holding cylinder 46, the upper end opening of the cylinder sleeve 3 is fitted into the convex part 48 of the upper mold 9 and closed, and the lower end surface of the cylinder sleeve 3 is closed by fitting into the molten metal. The convex portion 45a of the intrusion prevention plate 45 is aligned with the lower end surface of the convex portion 45a, and the lower end opening of the cylinder sleeve 3 is closed by the molten metal infiltration prevention plate 45. And the hydraulic cylinder 51 of the diameter expansion mechanism 41
is actuated to raise the actuating rod 50 by its hollow piston 52. As a result, the tapered portion 50
Since a moves upward, the diameter of the holding cylinder 46 expands, and the cylinder sleeve 3 is reliably held by the holding cylinder 46 under the force of expanding the diameter.
第5、第11図に示すように中子59における
両側の円筒部601,604下縁を、下型11にお
ける両側の第1成形部181の頂面に突出する各
仮設置ピン25の凹部25aに係合させて中子5
9の仮設置を行う。 As shown in FIGS. 5 and 11, the lower edges of the cylindrical portions 60 1 , 60 4 on both sides of the core 59 are projected onto the top surface of the first molded portions 18 1 on both sides of the lower mold 11 by temporary installation pins 25 . The core 5 is engaged with the recess 25a of the core 5.
9. Perform temporary installation.
両側型101,102をそれらが互いに接近する
方向に所定距離移動させ、各中子受31と各幅木
63とを係合して中子59の本設置を行う。即
ち、各中子受31の係合孔31aに中子59にお
ける各幅木63の小径部63bを嵌合して中子5
9を位置決めし、また各大径部63aのシリンダ
バレル配列方向と平行な端面を各中子受31の挟
持面31bに衝合して中子59をそれら挟持面3
1bにより挟持するものである。また、他の両側
型103,104も同様に移動させる。 The two-sided molds 10 1 and 10 2 are moved a predetermined distance in a direction in which they approach each other, and each core holder 31 and each baseboard 63 are engaged to perform the actual installation of the core 59. That is, the small diameter portion 63b of each baseboard 63 of the core 59 is fitted into the engagement hole 31a of each core receiver 31, and the core 5
9, and the end surfaces of each large diameter portion 63a parallel to the cylinder barrel arrangement direction are abutted against the clamping surfaces 31b of each core receiver 31 to hold the core 59 between the clamping surfaces 3.
1b. Further, the other double-sided molds 10 3 and 10 4 are also moved in the same manner.
第6図に示すように、上型9を下降させて各シ
リンダスリーブ3を中子59の各円筒部601〜
604内に挿入し、溶湯浸入防止板45の凸部4
5aを第1成形部181頂面の凹部23に嵌合す
る。これにより溶湯浸入防止板45の凸部45a
により作動ピン30が押し下げられるので各仮設
置ピン24が下降して第1成形部181頂面より
引込む。また上型9の型締め用凹部12が各側型
101〜104の型締め用凸部13に嵌合して型締
めが行われる。 As shown in FIG. 6, the upper mold 9 is lowered and each cylinder sleeve 3 is attached to each cylindrical portion 60 1 to 60 of the core 59.
60 4 , and insert it into the convex portion 4 of the molten metal intrusion prevention plate 45.
5a is fitted into the recess 23 on the top surface of the first molded part 181 . As a result, the convex portion 45a of the molten metal intrusion prevention plate 45
As the operating pin 30 is pushed down, each temporary installation pin 24 is lowered and retracted from the top surface of the first molded part 181 . Further, the mold clamping concave portion 12 of the upper mold 9 fits into the mold clamping convex portion 13 of each of the side molds 10 1 to 10 4 to perform mold clamping.
下型11の湯溜部14に溶解炉よりアルミニウ
ム合金溶湯を供給し、プランジヤ16を上昇させ
て溶湯を両湯道17より堰19を通じて第2キヤ
ビテイC2の両下縁よりそのキヤビテイC2および
第1キヤビテイC1に充填する。両キヤビテイC1,
C2内の空気等のガスは、溶湯により押し上げら
れ第3、第4キヤビテイC3,C4に連通する空気
通路37,38を経て上型9の上方へ抜ける。 Molten aluminum alloy is supplied from the melting furnace to the sump 14 of the lower die 11, and the plunger 16 is raised to supply the molten metal from both runners 17 through the weir 19 and from both lower edges of the second cavity C 2 to the cavities C 2 and 2. Fill the first cavity C1 . Both cavities C 1 ,
Gas such as air in C 2 is pushed up by the molten metal and escapes above the upper mold 9 through air passages 37 and 38 communicating with the third and fourth cavities C 3 and C 4 .
この場合両湯道17の断面積が前述のように湯
道先17aに向けて段階的に減少するように、湯
道底面が湯溜部14側より数段の上り階段状に形
成されているので、プランジヤ16の上昇により
溶湯は両湯道17より各堰19を通じて第2キヤ
ビテイC2の両側下端よりその全長に亘つて略均
等にそのキヤビテイC2内をスムーズに押し上げ
られる。したがつて溶湯が両キヤビテイC1,C2
内で乱流を起こすことがなく、溶湯中への空気等
のガスの巻込みを防止して巣の発生を回避するこ
とができる。 In this case, the bottom surface of the runners is formed in the shape of several steps ascending from the trough portion 14 side so that the cross-sectional area of both runners 17 gradually decreases toward the runner tip 17a as described above. As the plunger 16 rises, the molten metal is smoothly pushed up into the cavity C 2 from both runners 17 and through each weir 19 from the lower ends of both sides of the second cavity C 2 almost uniformly over its entire length. Therefore, the molten metal has both cavities C 1 and C 2
This prevents turbulence within the molten metal, prevents gases such as air from getting into the molten metal, and prevents the formation of cavities.
第3、第4キヤビテイC3,C4に溶湯が充填さ
れた時点で、上型9上の油圧シリンダ39を作動
させて取付板36を下降させ、閉鎖ピン34,3
5によつて両キヤビテイC3,C4に連通する小径
部32a,33aを閉鎖する。 When the third and fourth cavities C 3 and C 4 are filled with molten metal, the hydraulic cylinder 39 on the upper mold 9 is operated to lower the mounting plate 36 and the closing pins 34 and 3
5 closes the small diameter portions 32a and 33a communicating with both cavities C 3 and C 4 .
前記注湯作業において、第2キヤビテイC2お
よび第1キヤビテイC1に溶湯を充填するための
プランジヤ16の変位および溶湯圧力は第12図
に示すように制御される。 In the pouring operation, the displacement of the plunger 16 and the pressure of the molten metal for filling the second cavity C 2 and the first cavity C 1 with molten metal are controlled as shown in FIG. 12.
即ち、プランジヤ16はその移動速度を第1〜
第3速V1〜V3の3段階に制御される。本実施例
では第1速V1は0.08〜0.12m/sec、第2速V2は
0.14〜0.18m/sec、第3速V3は大幅な減速状態
となるように0.04〜0.08m/secにそれぞれ設定さ
れ、この3段階の速度制御によつて溶湯の波立を
防止して空気等のガスを巻き込むことのない静か
な溶湯流を形成し、その溶湯を前記両キヤビテイ
C2,C1に効率良く充填することができる。 That is, the plunger 16 changes its moving speed from the first to
The third speed is controlled in three stages, V1 to V3 . In this example, the first speed V 1 is 0.08 to 0.12 m/sec, and the second speed V 2 is
0.14 to 0.18 m/sec, and the third speed V 3 is set to 0.04 to 0.08 m/sec to achieve a significant deceleration state. By controlling the speed in these three stages, the molten metal is prevented from rippling and air etc. Forms a quiet flow of molten metal without involving any gases, and directs the molten metal into both cavities.
C 2 and C 1 can be efficiently filled.
またプランジヤ16の第1速V1では、溶湯は
両湯道17等に充満するだけであるから溶湯の圧
力P1は略一定に保持され、プランジヤ16の第
2、第3速V2,V3では溶湯は両キヤビテイC1,
C2に充填されるので溶湯の圧力P2は急激に上昇
する。プランジヤ16を第3速V3で所定時間移
動させた後は、溶湯の充填圧P3を約1.5秒間、150
〜400Kg/cm2に保持し、これにより中子59を溶
湯により完全に包んでその表面に溶湯凝固膜を形
成する。 In addition, at the first speed V 1 of the plunger 16, the molten metal only fills both runners 17, etc., so the pressure P 1 of the molten metal is kept approximately constant, and at the second and third speeds V 2 and V of the plunger 16. In 3 , the molten metal is in both cavities C 1 ,
Since C 2 is filled with molten metal, the pressure P 2 of the molten metal rises rapidly. After moving the plunger 16 at the third speed V3 for a predetermined time, the molten metal filling pressure P3 is increased to 150°C for about 1.5 seconds.
~400 Kg/cm 2 , thereby completely covering the core 59 with the molten metal and forming a molten metal coagulation film on its surface.
前記時間経過後においては、プランジヤ16を
速度V4で減速移動させるので溶湯の圧力P4は上
昇し、その圧力P5が200〜600Kg/cm2となつたと
きプランジヤ16の移動を止めてこの状態で溶湯
を凝固させる。 After the above-mentioned time has elapsed, the plunger 16 is moved at a reduced speed V4 , so the pressure P4 of the molten metal rises, and when the pressure P5 reaches 200 to 600 kg/ cm2 , the plunger 16 stops moving. solidify the molten metal.
前記のように溶湯の圧力を所定時間略一定に保
つことにより中子59の表面に溶湯凝固膜を形成
すると、次の溶湯加圧時に中子59が前記膜によ
り保護されて破損することがない。 If a molten metal coagulation film is formed on the surface of the core 59 by keeping the pressure of the molten metal substantially constant for a predetermined period of time as described above, the core 59 will be protected by the film and will not be damaged during the next pressurization of the molten metal. .
また中子59は、それの各幅木63を介して両
側型101,102により正確な位置に挟持されて
いるので、第1キヤビテイC1内への溶湯の充填
時およびそのキヤビテイC1内の溶湯の加圧時に
おいて中子59が浮き上がつたりすることがな
い。また各幅木63の大径部63aの端面が両側
型101,102における中子受31の挟持面31
bに衝合しているので、中子59が脹らみ傾向に
なると、その変形力は各挟持面31bにより支承
され、これにより中子59の変形が防止されて各
シリンダスリーブ3回りの肉厚が均一なサイアミ
ーズシリンダバレル1が得られる。 In addition, since the core 59 is held in an accurate position by the molds 10 1 and 10 2 on both sides via the baseboards 63 of the core 59, when filling the first cavity C 1 with molten metal and the cavity C 1 When the molten metal inside is pressurized, the core 59 does not float or sag. Further, the end surface of the large diameter portion 63a of each baseboard 63 is the clamping surface 31 of the core receiver 31 in the double-sided types 10 1 and 10 2 .
b, so that when the core 59 tends to swell, the deformation force is supported by each clamping surface 31b, thereby preventing the core 59 from deforming and reducing the thickness around each cylinder sleeve 3. A Siamese cylinder barrel 1 having a uniform thickness is obtained.
前記のようにプランジヤ16の移動速度および
溶湯の圧力を制御することによつてダイカスト鋳
造と略同じ生産効率を以てクローズドデツキ型の
シリンダブロツク素材を鋳造することができる。 By controlling the moving speed of the plunger 16 and the pressure of the molten metal as described above, a closed deck cylinder block material can be cast with substantially the same production efficiency as die casting.
溶湯が凝固を完了した後、拡径機構41の油圧
シリンダ51を作動させ、作動ロツド50を下降
させてシリンダスリーブ3に対する保持筒46の
拡径力を除去し、型開きを行つた後堰、湯道等を
除去すると第4図に示すシリンダブロツク素材
Smが得られる。 After the molten metal has solidified, the hydraulic cylinder 51 of the diameter expansion mechanism 41 is operated, the operating rod 50 is lowered to remove the diameter expansion force of the holding cylinder 46 against the cylinder sleeve 3, and the mold is opened. After removing the runners, etc., the cylinder block material shown in Figure 4 is created.
Sm is obtained.
前記シリンダブロツク素材Smに研削加工を施
して各第4キヤビテイC4と中子59の各突起6
2との協働により成形された各突出部64を除去
すると、突起62により連通口7が、また相隣る
連通口7間に補強デツキ部8がそれぞれ形成され
る。 The cylinder block material Sm is ground to form each fourth cavity C4 and each protrusion 6 of the core 59.
When the protrusions 64 formed in cooperation with the protrusions 62 are removed, the protrusions 62 form the communication ports 7, and the reinforcing deck portions 8 are formed between the adjacent communication ports 7.
シリンダブロツク素材Smの連通口7および中
子59の各幅木63により形成された開口部66
よりたがね、ポンチ、ドリル等を用いて中子59
を大まかに崩壊し、次いでシリンダブロツク素材
Smに振動を与えて中子59の崩壊を促進し、そ
の素材Smより砂出しを行う。この場合振動によ
り中子59の崩壊が進行しているので中子59の
略90%がシリンダブロツク素材Smより除去され
る。 An opening 66 formed by the communication port 7 of the cylinder block material Sm and each baseboard 63 of the core 59
Using a chisel, punch, drill, etc., insert the core 59.
Roughly disintegrate and then cylinder block material
Vibration is applied to Sm to promote the collapse of the core 59, and sand is removed from the material Sm. In this case, since the core 59 is collapsing due to vibration, approximately 90% of the core 59 is removed from the cylinder block material Sm.
さらに前記連通口7および開口部66を利用し
てシリンダブロツク素材Smの内部にシヨツトブ
ラストまたはサンドブラスト処理を施し、中子5
9をその素材Smより完全に除去して水ジヤケツ
ト6を得る。 Furthermore, using the communication port 7 and the opening 66, shot blasting or sandblasting is performed on the inside of the cylinder block material Sm, and the core 5 is
9 is completely removed from the material Sm to obtain a water jacket 6.
中子59を除去されたシリンダブロツク素材
Smに焼鈍処理、即ち、その素材Smを220℃で3.5
時間加熱する熱処理を施して歪取りを行う。 Cylinder block material with core 59 removed
Sm is annealed, that is, the material Sm is heated to 3.5°C at 220°C.
Heat treatment is performed to remove distortion.
シリンダブロツク素材Smにばり取り加工を施
し、検査を経た後各シリンダスリーブ3に直円加
工等の機械加工を施して第1〜第3図に示すシリ
ンダブロツクSを得る。 After deburring the cylinder block material Sm and inspecting it, each cylinder sleeve 3 is subjected to machining such as straight circular machining to obtain the cylinder block S shown in FIGS. 1 to 3.
第13図において、aは前記シリンダブロツク
S全体をエンジン運転中の温度である200℃で1.5
時間加熱し、常温でのシリンダスリーブ3におけ
る内径の永久変形量を測定したものである。bは
前記従来法により得られた比較例のものの場合を
示す。 In FIG. 13, a is 1.5 at 200°C, which is the temperature of the entire cylinder block S during engine operation.
The amount of permanent deformation of the inner diameter of the cylinder sleeve 3 at room temperature was measured after heating for a period of time. b shows the case of a comparative example obtained by the conventional method.
図中〜はシリンダバレル11〜14における
シリンダスリーブ3にそれぞれ対応する。 In the figure, ~ corresponds to the cylinder sleeves 3 in the cylinder barrels 11 to 14 , respectively.
第13図a,bから明らかなように、比較例の
シリンダブロツクではそのシリンダスリーブにお
る内径の永久変形量がシリンダスリーブのシリン
ダヘツド接合面からの深さ30mmにおいて最高55μ
を示しており、またエンジン運転中に高温となる
前記深さ10〜50mmの範囲において各スリーブの前
記永久変形量のばらつきが大きいが、本発明によ
り得られたシリンダブロツクSではシリンダヘツ
ド接合面からの深さ30〜50mmにおいて最高20μを
示しており、シリンダスリーブ3における内径の
永久変形量が大幅に低減され、また前記深さ範囲
における各スリーブ3の前記永久変形量のばらつ
きが小さい。これは中子59の除去を常温下で行
うことにより各スリーブ3に不均一な応力が残留
しないことに起因する。 As is clear from Figures 13a and 13b, in the cylinder block of the comparative example, the amount of permanent deformation of the inner diameter of the cylinder sleeve was at most 55μ at a depth of 30mm from the cylinder head joint surface of the cylinder sleeve.
In addition, there is a large variation in the amount of permanent deformation of each sleeve in the depth range of 10 to 50 mm, which is at high temperature during engine operation, but in the cylinder block S obtained by the present invention, from the cylinder head joint surface The maximum value is 20 μ at a depth of 30 to 50 mm, and the amount of permanent deformation of the inner diameter of the cylinder sleeve 3 is significantly reduced, and the variation in the amount of permanent deformation of each sleeve 3 in the depth range is small. This is because removing the core 59 at room temperature prevents uneven stress from remaining in each sleeve 3.
C 発明の効果
本発明によれば、常温下において中子を崩壊し
てシリンダブロツク素材より除去するので、その
素材の硬度を低下させることがない。したがつて
前記素材の硬度を回復するためのT6処理が不要
であり、単に前記素材に焼鈍処理を施して歪取り
を行うだけで高精度なシリンダブロツクを得るこ
とができる。C. Effects of the Invention According to the present invention, since the core is disintegrated at room temperature and removed from the cylinder block material, the hardness of the material is not reduced. Therefore, there is no need for T6 treatment to restore the hardness of the material, and a highly accurate cylinder block can be obtained simply by annealing the material to remove distortion.
また中子除去のための加熱処理が不要で、その
上前記焼鈍処理は比較的低温で短時間の中に行わ
れるので、エネルギ消費量を大幅に低減し経済性
を向上させることができる。 Further, since no heat treatment is required for removing the core, and the annealing treatment is performed at a relatively low temperature and in a short period of time, energy consumption can be significantly reduced and economical efficiency can be improved.
第1乃至第3図はサイアミーズ型シリンダブロ
ツクを示し、第1図は上方からみた斜視図、第2
図は第1図−線断面図、第2A図は第2図
a−a線断面図、第3図は下方から見た斜視
図、第4図はサイアミーズ型シリンダブロツク素
材を上方から見た斜視図、第5図は本発明の鋳造
工程で用いられる鋳造装置の型開き時の縦断正面
図、第6図は前記鋳造装置の型閉め時の縦断正面
図、第7図は第6図−線断面図、第8図は第
7図−線断面図、第9図は第5図−線断
面図、第10図は中子を上方から見た斜視図、第
11図は第10図XI−XI線断面図、第12図は時
間とプランジヤの変位および時間に対する溶湯の
圧力の関係を示すグラフ、第13図はシリンダス
リーブのシリンダヘツド接合面からの深さとシリ
ンダスリーブにおける内径変化量の関係を示すグ
ラフであり、aは本発明により得られたシリンダ
ブロツクの場合、bは従来法により得られたシリ
ンダブロツクの場合にそれぞれ該当する。
C1…第1キヤビテイ、M…鋳型としての金型、
S…シリンダブロツク、Sm…シリンダブロツク
素材、11〜14…シリンダバレル、3…シリンダ
スリーブ、6…水ジヤケツト、59…可崩壊性中
子。
Figures 1 to 3 show a Siamese type cylinder block, with Figure 1 being a perspective view from above and Figure 2 being a perspective view from above.
The figures are a cross-sectional view taken along the line in Figure 1, Figure 2A is a cross-sectional view taken along the line a-a in Figure 2, Figure 3 is a perspective view taken from below, and Figure 4 is a perspective view taken from above of the Siamese type cylinder block material. Fig. 5 is a vertical sectional front view of the casting device used in the casting process of the present invention when the mold is opened, Fig. 6 is a vertical sectional front view of the casting device when the mold is closed, and Fig. 7 is the line shown in Fig. 6. 8 is a sectional view taken along the line of FIG. 7, FIG. 9 is a sectional view taken along the line of FIG. 5, FIG. 10 is a perspective view of the core seen from above, and FIG. 12 is a graph showing the relationship between the displacement of the plunger and the pressure of the molten metal against time, and FIG. 13 is a graph showing the relationship between the depth of the cylinder sleeve from the cylinder head joint surface and the amount of change in the inner diameter of the cylinder sleeve. 2 is a graph in which a corresponds to the cylinder block obtained by the present invention, and b corresponds to the cylinder block obtained by the conventional method. C 1 ...first cavity, M...mold as mold,
S...Cylinder block, Sm...Cylinder block material, 11 to 14 ...Cylinder barrel, 3...Cylinder sleeve, 6...Water jacket, 59...Disintegrable core.
Claims (1)
と共に該シリンダバレルの外周に水ジヤケツトを
配設したアルミニウム合金製シリンダブロツクを
製造する当り、鋳型のキヤビテイに前記シリンダ
スリーブと該シリンダスリーブを囲繞する水ジヤ
ケツト用可崩壊性中子とを配設してアルミニウム
合金溶湯によりシリンダブロツク素材を鋳造する
工程と;常温下において前記中子を崩壊して前記
シリンダブロツク素材より除去する工程と、前記
シリンダブロツク素材に焼鈍処理を施す工程と;
前記シリンダブロツク素材に機械加工を施す工程
と;よりなるシリンダブロツクの製造方法。1. When manufacturing an aluminum alloy cylinder block in which a cast iron sleeve is cast into a cylinder barrel and a water jacket is arranged around the outer periphery of the cylinder barrel, the cylinder sleeve and the water jacket surrounding the cylinder sleeve are placed in the cavity of the mold. casting a cylinder block material using molten aluminum alloy with a collapsible core; disintegrating the core at room temperature and removing it from the cylinder block material; a step of applying an annealing treatment;
A method for manufacturing a cylinder block, comprising: performing machining on the cylinder block material.
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP26389284A JPS61154732A (en) | 1984-12-14 | 1984-12-14 | Production of cylinder block |
CA000494738A CA1256265A (en) | 1984-11-09 | 1985-11-06 | Process for manufacturing siamese-type cylinder block |
GB08527656A GB2168632B (en) | 1984-11-09 | 1985-11-08 | Siamese-type cylinder blocks |
US07/051,622 US5121786A (en) | 1984-11-09 | 1987-05-19 | Process for manufacturing siamese-type cylinder block |
GB08722957A GB2194473B (en) | 1984-11-09 | 1987-09-30 | Siamese-type cylinder blocks |
GB08722956A GB2194472B (en) | 1984-11-09 | 1987-09-30 | Siamese-type cylinder blocks |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP26389284A JPS61154732A (en) | 1984-12-14 | 1984-12-14 | Production of cylinder block |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS61154732A JPS61154732A (en) | 1986-07-14 |
JPS6338257B2 true JPS6338257B2 (en) | 1988-07-29 |
Family
ID=17395703
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP26389284A Granted JPS61154732A (en) | 1984-11-09 | 1984-12-14 | Production of cylinder block |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS61154732A (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20120116992A (en) * | 2004-06-28 | 2012-10-23 | 콘솔리데이티드 엔지니어링 캄파니, 인크. | Method and apparatus for removal of flashing and blockages from a casting |
CN113714836A (en) * | 2021-08-30 | 2021-11-30 | 重庆顺多利机车有限责任公司 | High-precision alloy shell hole aligning machining system and method |
-
1984
- 1984-12-14 JP JP26389284A patent/JPS61154732A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS61154732A (en) | 1986-07-14 |
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