WO2013094324A1 - シリンダブロックの製造方法及びシリンダブロック - Google Patents
シリンダブロックの製造方法及びシリンダブロック Download PDFInfo
- Publication number
- WO2013094324A1 WO2013094324A1 PCT/JP2012/078624 JP2012078624W WO2013094324A1 WO 2013094324 A1 WO2013094324 A1 WO 2013094324A1 JP 2012078624 W JP2012078624 W JP 2012078624W WO 2013094324 A1 WO2013094324 A1 WO 2013094324A1
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- WIPO (PCT)
- Prior art keywords
- shape
- cylinder bore
- cylinder block
- cylinder
- bearing cap
- Prior art date
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Classifications
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- 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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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/18—After-treatment
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- 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
-
- 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
- F02F1/18—Other cylinders
-
- 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
- F02F7/0095—Constructing engine casings
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- 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
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- 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
- F02F7/0043—Arrangements of mechanical drive elements
- F02F7/0053—Crankshaft bearings fitted in the crankcase
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2253/00—Other material characteristics; Treatment of material
- F05C2253/12—Coating
Definitions
- the present invention relates to a cylinder block manufacturing method for forming a sprayed coating on the inner surface of a cylinder bore and the cylinder block.
- the cylinder bore is deformed by a stress generated by fastening the fastener.
- the cylindricity of the cylinder bore inner surface is deteriorated, and the shape of the cylinder bore inner surface is not a regular cylinder (a cylinder satisfying the required cylindricity). More specifically, the shape of the inner surface of the cylinder bore in the cross section perpendicular to the axial direction of the cylinder bore is not a regular circle (a circle satisfying the required roundness) but an ellipse or an oval.
- An object of the present invention is to improve the workability of the finishing process performed on the spray coating on the inner surface of the cylinder bore after the bearing cap is attached to the cylinder block.
- the inner surface of the cylinder bore in the cylinder block before mounting the bearing cap is different from the target shape so that the inner surface of the cylinder bore is deformed to the target shape by attaching the bearing cap to the cylinder block.
- a second aspect of the present invention is a cylinder block including an inner surface of a cylinder bore processed into a first shape different from a target shape, and a thermal spray coating formed on the inner surface of the cylinder bore having the first shape.
- FIG. 1 is a cross-sectional view showing a state in which a bearing cap is attached to a cylinder block according to a first embodiment of the present invention.
- 2A and 2B are explanatory views showing a deformation mode of the cylinder bore by attaching a bearing cap to the cylinder block.
- FIG. 2A is a view as viewed from an arrow A in FIG. 1
- FIG. 2B is a view as viewed from an arrow B in FIG.
- FIG. 3 is a flowchart showing a method of manufacturing the cylinder block according to the first embodiment.
- FIG. 4 is an explanatory diagram showing the work content of the thermal spraying process in the flowchart of FIG. FIG.
- FIG. 5 is a diagram showing a change in the shape of the cylinder bore corresponding to the work content of FIG.
- FIG. 6 is a cross-sectional view showing a state in which the inner surface of the cylinder bore is processed so as to be deformed with respect to a regular cylindrical shape before attaching the bearing cap to the cylinder block.
- FIG. 7 shows the shape of the cylinder bore after processing in FIG. 6, (a) is a view taken in the direction of arrow A in FIG.
- FIGS. 8A and 8B are explanatory views showing the finishing process for the thermal spray coating according to the second embodiment of the present invention, where FIG. 8A shows the rough honing process and FIG. 8B shows the finishing honing process.
- a cylinder block 1 of an automotive V-type engine shown in FIG. 1 is made of an aluminum alloy, and a thermal spray coating 5 is formed on the inner surface of the cylinder bore 3 to enhance characteristics such as wear resistance.
- the thermal spray coating 5 is formed by a conventionally well-known method.
- a thermal spray gun (not shown) is inserted into the cylinder bore 3 while being rotated, and is reciprocated in the axial direction of the cylinder bore.
- a droplet is ejected to adhere to the inner surface of the cylinder bore 3.
- a wire made of an iron-based material serving as a spraying material is sequentially supplied from the outside of the spray gun to the nozzle portion, and the wire is melted by a heat source such as a plasma arc to generate droplets.
- the bearing cap 7 is fastened and fixed to the lower surface of the cylinder block 1 by a plurality of bolts 9 serving as fasteners.
- the bearing cap 7 supports the crankshaft 15 with the cylinder block 1.
- the bearing portion 13 of the bearing cap 7 supports the journal portion 17 of the crankshaft 15 together with the bearing portion 11 of the cylinder block 1 so as to be rotatable.
- An oil pan (not shown) is attached to the lower surface of the bearing cap 7 opposite to the cylinder block 1, and a cylinder head (not shown) is attached to the upper surface of the cylinder block 1 opposite to the bearing cap 7.
- FIG. 3 is a flowchart showing a manufacturing method of the cylinder block 1 according to the first embodiment.
- a sprayed coating 5 is formed on the inner surface of the cylinder bore 3 in the spraying step 21.
- the thermal spraying step 21 as a pre-processing step 23 the outer shape of the cylinder block 1 is machined, and then a leak test 25 is performed.
- the leak test 25 is a liquid leak inspection concerning coolant leakage in the water jacket 1a and lubricating oil leakage in the crankcase 1b.
- the leak test 25 is performed by a conventionally well-known method. For example, the internal pressure in the water jacket 1a or the crankcase 1b is raised in a sealed state, and the internal pressure is increased after a predetermined time has elapsed. It is also determined whether or not the value is maintained above the specified value.
- the process proceeds to a bearing cap assembling step 27, and the bearing cap 7 is fastened and fixed to the cylinder block 1 with a plurality of bolts 9. Then, it progresses to the finishing process 29, and finishes, such as a honing process, are performed with respect to the sprayed coating 5 formed in the inner surface of the cylinder bore 3 there.
- the cylinder bore 3 is deformed by the stress generated by fastening the plurality of bolts 9. If the inner surface of the cylinder bore 3 is formed in a normal cylindrical shape in the cylinder block 1 before the bearing cap 7 is mounted, the cylindricity of the inner surface of the cylinder bore 3 is deteriorated due to the deformation of the cylinder bore 3 when the bolt 9 is fastened. That is, even if the shape of the inner surface of the cylinder bore 3 is a regular cylindrical shape (cylindrical shape that satisfies the required cylindricity) before the bearing cap 7 is attached, the shape of the inner surface of the cylinder bore 3 is not changed after the bearing cap 7 is attached. It is no longer a regular cylinder.
- the shape of the inner surface of the cylinder bore 3 in the cross section perpendicular to the axial direction of the cylinder bore 3 is not a regular circle (a circle satisfying the required roundness) indicated by a broken line in FIG. It is oval.
- the cylinder bore 3, P 1 (major axis after deformation) direction of a length corresponding to the lateral direction of FIG. 1, perpendicular to the paper surface in FIG. 1 deformed into long ellipse or oval than Q 1 (minor diameter after deformation) direction of a length corresponding to the direction of. 1 is a direction parallel to the rotation axis O of the crankshaft 15, and the left-right direction in FIG. 1 is a direction parallel to a plane orthogonal to the rotation axis O of the crankshaft 15. .
- the cylinder bore 3 is deformed by tightening bolts 9 located on the left and right sides with respect to the center between the left and right cylinder bores 3 in FIG. Caused by falling and deforming (in the direction indicated by C). This falling deformation occurs at the center between the left and right cylinder bores 3.
- the cylinder bore 3 is deformed by fastening the bolts 9 located on both sides of the rotation axis O of the crankshaft 15 so that the peripheral part of the cylinder bore 3 parallel to the direction orthogonal to the rotation axis O is around the rotation axis O. It can also be said that the rotation occurs in directions away from each other.
- the operation shown in FIG. 4 is performed in the thermal spraying step 21 shown in FIG. That is, the inner surface of the cylinder bore 3 is deformed in advance to the shape before the deformation (first shape) so that the inner surface of the cylinder bore 3 is deformed into a regular cylindrical shape (target shape) by the deformation of the cylinder bore 3 caused by attaching the bearing cap 7 to the cylinder block 1. (Work 21a).
- This pre-deformation shape is different from the target regular cylindrical shape.
- the regular cylindrical shape is opposite to the deformation direction of the cylinder bore 3 that occurs when the bearing cap 7 is attached to the cylinder block 1. It is a shape obtained by deforming.
- the deformation in the reverse direction is a contraction deformation along the same direction.
- the deformation at the time of mounting the bearing cap 7 is to deform the cross section perpendicular to the axial direction of the cylinder bore 3 along a certain direction
- the deformation in the reverse direction is the same direction in the cross section. It is meant to be deformed so as to be contracted along.
- the deformation in the opposite direction can be regarded as a deformation of the cross section so as to be stretched in a direction orthogonal to the extending direction when the bearing cap 7 is attached.
- FIG. 6 shows a method of processing the inner surface of the cylinder bore 3 into a shape before deformation.
- the boring bar 35 is rotated while being inserted into the cylinder bore 3, and the cutting edge 37 provided at the tip of the boring bar 35 is inserted into the cylinder bore 3. Perform while moving along the inner surface.
- the position of the cutting edge 37 can be continuously controlled by NC control.
- the shape of the inner surface of the cylinder bore 3 in the cross section perpendicular to the axial direction of the cylinder bore 3 is not a regular circle but an oval or It is oval. More particularly, the shape of the cylinder bore 3 inner surface (the major axis before deformation) P 2 direction length corresponding to a direction perpendicular to the paper surface in FIG. 6, the length of the direction corresponding to the horizontal direction of FIG. 6 ( deformation than the short diameter) Q 2 before the long ellipse or oval.
- This oval or oval is a shape obtained by deforming a regular circle in a direction opposite to the direction of deformation of the cylinder bore 3 that occurs when the bearing cap 7 is attached to the cylinder block 1.
- 6 is a direction parallel to the rotation axis O of the crankshaft 15, and the left-right direction in FIG. 6 is a direction parallel to a plane orthogonal to the rotation axis O of the crankshaft 15. .
- the sprayed coating 5 is formed on the inner surface of the cylinder bore 3 having the shape before deformation using a conventionally known spraying technique (operation 21b).
- the shapes of the cylinder bores 3 after performing the operations 21a and 21b of FIG. 4 are shown in FIGS. 5 (a) and 5 (b), respectively.
- 5 is (a) and (b) the dimension P 2 in corresponds to FIGS. 7 (a) and the length of the cylinder bore 3 in (b) (long diameter before deformation) P 2.
- a pre-processing step 23 and a leak test 25 are sequentially performed.
- the bearing cap 7 is attached to the cylinder block 1 having the cylinder bore 3 processed into the shape of FIG.
- the direction of action of the stress generated by the fastening bolt 9 when attaching the bearing cap 7 is a direction corresponding to P 1 (major axis after deformation) length at FIG.
- the shape before deformation of the cylinder bore 3 is an oval shape or an oval shape in a cross section perpendicular to the axial direction at least in the axial intermediate position of the cylinder bore 3 (the midpoint of the axial length L). It has become. For this reason, the entire inner surface of the cylinder bore 3 can be more reliably corrected to a regular cylindrical shape by the stress generated when the bearing cap 7 is attached to the cylinder block 1.
- the shape of the cross section perpendicular to the axial direction of the cylinder bore 3 may be changed according to the position in the axial direction.
- the cross-sectional shape of the cylinder bore 3 is changed to the direction or amount of deformation. It can be changed corresponding to the distribution of. Thereby, the shape of the whole inner surface of the cylinder bore 3 after attaching the bearing cap 7 to the cylinder block 1 can be made closer to an ideal cylindrical shape.
- the finishing process by the honing process is performed on the sprayed coating 5 on the inner surface of the cylinder bore 3 that has been corrected into a regular cylindrical shape.
- the shape of the inner surface of the thermal spray coating 5 is a regular cylinder having a regular circular cross section as shown in FIG. 5C, the cylindricity is corrected by honing for the thermal spray coating 5.
- the processing to do becomes unnecessary. Therefore, work efficiency in finishing is improved, and workability deterioration can be suppressed.
- the thermal spraying process 21 is set immediately after the casting process 19. This is because if the thermal spraying process 21 is set to a subsequent process such as immediately before the finishing process 29, for example, a loss when a casting defect is found increases. That is, when a casting defect is found during spraying, the cylinder block 1 is discarded, and the processing cost required for the pre-processing step 23 from the casting operation to the thermal spraying operation is wasted. Because.
- thermal spraying process 21 it is possible to further reduce the line remodeling part of the subsequent manufacturing process, which can contribute to the reduction of the equipment cost. If the thermal spraying process 21 is set as a post process such as immediately before the finishing process 29, for example, the thermal spraying process 21 needs to be incorporated in the middle of the current line, and the scale of the line is increased.
- the finishing coating step 29 finishes the sprayed coating 5 such as honing. Processing.
- rough honing and finish honing are performed as finishing.
- the rough honing process is performed by fixing the rough honing head 39 as a rough finishing tool and the drive unit 41 side that rotationally drives the rough honing head 39 to each other, Performed in a rigid connection.
- the shape of the inner surface of the cylinder bore 3 in a cross section perpendicular to the axial direction of the cylinder bore 3 extends in a certain direction when the bearing cap 7 is fastened and fixed to the cylinder block 1.
- the finishing process 29 by performing rough honing with the rough honing head 39 and the drive unit 41 side rigidly connected, for example, the shape of the inner surface of the cylinder bore 3 deformed into an elliptical shape or an oval shape can be efficiently obtained. It can be modified to a circle. Thereby, the work efficiency in finishing can be further improved.
- the finish honing head 45 and the drive unit 47 side are connected by a universal joint 49 in a floating state. Thereby, the sprayed coating surface after rough honing can be finished more efficiently and with high accuracy.
- the cylinder block 1 of the V-type engine for automobiles has been described.
- the present invention can be applied to a cylinder block of an in-line engine.
- the target shape of the inner surface of the cylinder bore 3 is exemplified by a cylindrical shape that satisfies the required cylindricity, but the shape is not particularly limited and may be a cylindrical shape having an elliptical cross section.
- the inner surface of the sprayed coating of the cylinder bore can be transformed into a regular cylinder satisfying the required cylindricity.
- processing for correcting the cylindricity becomes unnecessary, and thus the working efficiency in finishing processing is improved.
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Abstract
Description
図1に示す自動車用V型エンジンのシリンダブロック1は、アルミニウム合金製であり、そのシリンダボア3の内面に溶射皮膜5を形成して耐磨耗性などの特性を高めている。溶射皮膜5は、従来からよく知れている方法で形成され、例えば、図示しない溶射ガンをシリンダボア3内に回転させながら挿入してシリンダボアの軸方向に往復移動させ、溶射ガンの先端のノズル部から溶滴を噴出してシリンダボア3の内面に付着させる。ノズル部には、溶射ガンの外部から溶射用材料となる鉄系材料からなるワイヤを順次供給し、このワイヤをプラズマアークなどの熱源によって溶融させて溶滴を発生させる。
ベアリングキャップ組付工程27で、シリンダボア3の内面に溶射皮膜5を形成したシリンダブロック1に対してベアリングキャップ7を取り付けた後、仕上げ加工工程29で、溶射皮膜5に対し、ホーニング加工などの仕上げ加工を行う。第2の実施形態では、仕上げ加工として粗ホーニング加工と仕上げホーニング加工とを行う。本実施形態では、粗ホーニング加工は、図8(a)に示すように、粗仕上げ加工具としての粗ホーニングヘッド39と粗ホーニングヘッド39を回転駆動する駆動部41側とを、互いに固定し、リジッドに連結した状態で行う。
3 シリンダボア
5 溶射皮膜
7 ベアリングキャップ
39 粗ホーニングヘッド(粗仕上げ加工具)
41 駆動部
Claims (6)
- シリンダブロックにベアリングキャップを取り付けることでシリンダボアの内面が目標形状に変形するように、ベアリングキャップ取り付け前のシリンダブロックにおけるシリンダボアの内面を、前記目標形状とは異なる第1形状に加工し、
前記第1形状を有するシリンダボアの内面に溶射皮膜を形成することを特徴とするシリンダブロックの製造方法。 - シリンダボアの内面に溶射皮膜を形成したシリンダブロックにベアリングキャップを取り付け、
駆動部にリジッドに連結されて回転駆動される粗仕上げ加工具を使用して、前記溶射皮膜に対して粗仕上げ加工を行うことを特徴とする請求項1に記載のシリンダブロックの製造方法。 - 前記目標形状は、所定の円筒度を有する円筒形であり、
前記第1形状は、シリンダボアの軸方向中間位置における該軸方向に垂直な断面において楕円形状もしくは長円形状を呈する形状であることを特徴とする請求項1または2に記載のシリンダブロックの製造方法。 - 目標形状とは異なる第1形状に加工されたシリンダボアの内面と、
前記第1形状を有するシリンダボアの内面に形成された溶射皮膜と、を備えたことを特徴とするシリンダブロック。 - シリンダブロックにベアリングキャップを取り付けることで、前記シリンダボアの内面が前記第1形状から前記目標形状に変形することを特徴とする請求項4に記載のシリンダブロック。
- 前記目標形状は、所定の円筒度を有する円筒形であり、
前記第1形状は、シリンダボアの軸方向中間位置における該軸方向に垂直な断面において楕円形状もしくは長円形状を呈する形状であることを特徴とする請求項4または5に記載のシリンダブロック。
Priority Applications (5)
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CN201280052724.XA CN103890361B (zh) | 2011-12-22 | 2012-11-05 | 汽缸体的制造方法 |
US14/366,506 US9494103B2 (en) | 2011-12-22 | 2012-11-05 | Cylinder block manufacturing method and cylinder block |
EP12859191.4A EP2796697B1 (en) | 2011-12-22 | 2012-11-05 | Method for manufacturing a cylinder block of a v-engine |
JP2013550177A JP5835347B2 (ja) | 2011-12-22 | 2012-11-05 | シリンダブロックの製造方法及びシリンダブロック |
MX2014005439A MX349459B (es) | 2011-12-22 | 2012-11-05 | Método de manufactura del bloque de cilindro y bloque de cilindro. |
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JP2011281331 | 2011-12-22 | ||
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WO2015016224A1 (ja) * | 2013-07-30 | 2015-02-05 | 本田技研工業株式会社 | 円形穴加工方法及び円形穴加工装置 |
JP6029761B2 (ja) * | 2013-07-30 | 2016-11-24 | 本田技研工業株式会社 | 円形穴加工方法及び円形穴加工装置 |
JP2020153265A (ja) * | 2019-03-19 | 2020-09-24 | ダイハツ工業株式会社 | 多気筒内燃機関用シリンダブロック及びその製造方法 |
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JP6572851B2 (ja) * | 2016-08-29 | 2019-09-11 | トヨタ自動車株式会社 | 内燃機関のシリンダブロックおよびその製造方法 |
CN110700959B (zh) * | 2019-10-29 | 2021-04-16 | 潍柴动力股份有限公司 | 干式气缸套及发动机 |
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JPWO2015016223A1 (ja) * | 2013-07-30 | 2017-03-02 | 本田技研工業株式会社 | 円形穴加工方法及び円形穴加工装置 |
US9862034B2 (en) | 2013-07-30 | 2018-01-09 | Honda Motor Co., Ltd. | Round hole machining method and round hole machining device |
US9914177B2 (en) | 2013-07-30 | 2018-03-13 | Honda Motor Co., Ltd. | Round hole machining method and round-hole machining device |
JP2020153265A (ja) * | 2019-03-19 | 2020-09-24 | ダイハツ工業株式会社 | 多気筒内燃機関用シリンダブロック及びその製造方法 |
JP7280073B2 (ja) | 2019-03-19 | 2023-05-23 | ダイハツ工業株式会社 | 多気筒内燃機関用シリンダブロック及びその製造方法 |
Also Published As
Publication number | Publication date |
---|---|
CN103890361B (zh) | 2017-04-05 |
EP2796697B1 (en) | 2019-01-09 |
JP5835347B2 (ja) | 2015-12-24 |
CN103890361A (zh) | 2014-06-25 |
JPWO2013094324A1 (ja) | 2015-04-27 |
EP2796697A1 (en) | 2014-10-29 |
EP2796697A4 (en) | 2015-06-17 |
MX349459B (es) | 2017-07-31 |
US20150300288A1 (en) | 2015-10-22 |
US9494103B2 (en) | 2016-11-15 |
MX2014005439A (es) | 2014-08-22 |
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