WO2014065156A1 - Cylinder block and honing method - Google Patents
Cylinder block and honing method Download PDFInfo
- Publication number
- WO2014065156A1 WO2014065156A1 PCT/JP2013/077941 JP2013077941W WO2014065156A1 WO 2014065156 A1 WO2014065156 A1 WO 2014065156A1 JP 2013077941 W JP2013077941 W JP 2013077941W WO 2014065156 A1 WO2014065156 A1 WO 2014065156A1
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- cylinder
- cross hatch
- groove
- cylinder block
- honing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B33/00—Honing machines or devices; Accessories therefor
- B24B33/02—Honing machines or devices; Accessories therefor designed for working internal surfaces of revolution, e.g. of cylindrical or conical shapes
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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
- F02F1/18—Other cylinders
- F02F1/20—Other cylinders characterised by constructional features providing for lubrication
Definitions
- the present invention relates to a cylinder block in which a cross hatch is formed on an inner peripheral surface of a cylinder, and a honing method for processing a cross hatch on an inner peripheral surface of a cylinder provided in the cylinder block.
- a machining stitch (groove or streak) 32 called a cross hatch is formed on the inner peripheral surface of the cylinder bore 31 provided in the cylinder block 30 of the engine.
- the cross hatch 32 is simply shown, and the cross hatch 32 is actually finer and provided on the entire inner peripheral surface of the cylinder bore 31.
- the cross hatch 32 is provided on the inner peripheral surface of the cylinder bore 31 to retain the lubricating oil, but it resists sliding of the piston 33 (piston ring or piston skirt) and generates friction.
- a cross hatch angle also referred to as a honing angle
- ⁇ is relatively large (for example, about 140 °) as shown in FIG.
- the cross hatch angle ⁇ is generally in the range of 10 ° to 30 °.
- the feed stroke (stroke of the honing head 42) St in the axial direction of the cylinder bore 31 is long, so the grooves 34 constituting the cross hatch 32 are formed from the upper end 35 of the cylinder bore 31.
- the cylinder bore 31 is connected in a straight line up to the lower end 36. This is the same when the cross hatch angle ⁇ is relatively large.
- the friction due to the sliding of the piston 33 is likely to be reduced, but the friction due to the sliding of the piston 33 actually increases.
- the lubricating oil travels along the groove 34 of the cross hatch 32 and escapes in the sliding direction of the piston 33, and the oil film thickness becomes thin at the sliding portion (near the center of the stroke of the piston 33). This is probably because the friction coefficient is increased. Further, the lubricating oil escapes in the sliding direction of the piston 33 as the piston 33 slides.
- the groove 34 of the cross hatch 32 extends straight from the upper end 35 to the lower end 36 of the cylinder bore 31 over the entire length of the cylinder bore 31. It is thought that it is because they are connected.
- an object of the present invention is to provide a cylinder block and a honing method that can reduce friction caused by sliding of a piston.
- a cylinder block according to the present invention is a cylinder block in which a cross hatch having a cross hatch angle within a range of 130 ° to 150 ° is formed on an inner peripheral surface of a cylinder.
- the groove that extends between both ends of the cylinder and constitutes the cross hatch is provided with at least one bent portion that is bent in the middle of the groove.
- the honing method according to the present invention is a honing method for machining a cross hatch on an inner peripheral surface of a cylinder provided in a cylinder block, and using a honing head equipped with a grindstone, between the both ends of the cylinder.
- the groove constituting the cross hatch is formed by extending the honing head, the bent portion bent in the middle of the groove is reciprocated in small increments with respect to the axial direction of the cylinder while rotating the honing head.
- a plurality of grooves are provided.
- Figure 1 shows a schematic diagram of the cylinder block. 1 shows a cross-sectional view of the cylinder block and an enlarged view of the inner peripheral surface of the cylinder bore.
- crankshaft (not shown) is supported in a bearing hole 11 provided in a lower part of a cylinder block 10 of an engine (in this embodiment, a diesel engine), and a connecting rod (not shown) is supported on the crankshaft.
- the pistons 12 connected to each other reciprocate up and down in the cylinder bore 13.
- a cross hatch 14 having a cross hatch angle ⁇ within a range of 130 ° to 150 ° (for example, about 140 °) is formed on an inner peripheral surface of a cylinder bore 13 constituting a cylinder provided in the cylinder block 10.
- the cross hatch 14 is formed by a large number of grooves 17 extending between both ends (upper end 15 and lower end 16) of the cylinder bore 13, and these grooves 17 are V-shaped and bent so as to be folded back to the opposite side in the middle of the groove 17.
- a plurality of bent portions 18 are provided.
- the groove 17 of the cross hatch 14 provided on the inner peripheral surface of the cylinder bore 13 for retaining lubricating oil is not connected in a straight line from the upper end 15 to the lower end 16 of the cylinder bore 13 over the entire length of the cylinder bore 13.
- the cross hatch 14 is simply shown, and the cross hatch 14 is actually finer and provided on the entire inner peripheral surface of the cylinder bore 13.
- Fig. 2 shows an explanatory diagram of the honing method.
- the honing apparatus 20 includes a honing head 21 inserted into the cylinder bore 13 of the cylinder block 10 and a grindstone 22 attached to the honing head 21.
- the grindstone 22 is formed such that the length of the cylinder bore 13 in the axial direction is shorter than the length of the cylinder bore 13 (shorter than the entire length of the cylinder bore 13).
- the honing head 21 is inserted into the cylinder bore 13 without expanding the grindstone 22, and the grindstone 22 is expanded after the insertion.
- a feeding step of moving the honing head 21 from one end side to the other end side (from the upper end 15 side to the lower end 16 side or from the lower end 16 side to the upper end 15 side) while rotating the honing head 21 with the grindstone 22 expanded.
- the return step of moving the honing head 21 from the other end side to the one end side while rotating the honing head 21 with the grindstone 22 expanded is sequentially repeated.
- a groove 17 (cross hatch 14) having 18 can be formed on the inner peripheral surface of the cylinder bore 13.
- the feed stroke St1 in the feed process of the honing head 21 is about one-fifth of the entire length of the cylinder bore 13, for example, about 20 mm. Further, the feed stroke St2 in the returning process of the honing head 21 is about half the length of the feed stroke St1 in the feed process, for example, about 10 mm.
- the cross hatch 14 since the groove 17 constituting the cross hatch 14 is provided with a plurality of bent portions 18 that are bent in the middle of the groove 17, the cross hatch 14 extends from the upper end 15 to the lower end 16 of the cylinder bore 13 over the entire length of the cylinder bore 13. It is not connected in a straight line, and it is possible to prevent the lubricating oil from passing through the groove 17 of the cross hatch 14 and escaping in the sliding direction of the piston 12 as the piston 12 slides. Therefore, the space between the inner peripheral surface of the cylinder bore 13 and the piston ring or piston skirt is normally lubricated by the lubricating oil, and a sufficient oil film thickness can be obtained even at the sliding portion (near the stroke center of the piston 12). Therefore, the friction between the inner peripheral surface of the cylinder bore 13 and the piston ring or the piston skirt is reduced by the increase in the cross hatch angle ⁇ , and the friction due to the sliding of the piston 12 is reduced as a whole.
- the number of bent portions provided in the middle of the cross hatch groove is not limited to that shown in FIG. 1, and can be set as appropriate according to the overall length of the cylinder, the stroke of the piston, and the like.
- the present invention can be applied not only to the cylinder bore but also to the cylinder liner.
- the present invention can be applied not only to a cylinder block of a diesel engine but also to a cylinder block of a gasoline engine or the like.
Abstract
The present invention reduces friction caused by the sliding movement of a piston. Provided is a cylinder block (10) comprising a crosshatch (14) that is formed on the inner peripheral surface of a cylinder (13) and that has a crosshatch angle (θ) that is within the range of 130-150°. A groove (17) that extends between the two ends of the cylinder (13) and constitutes the crosshatch (14) is provided with one or more bent sections (18) that bend at an intermediate location in the groove (17).
Description
本発明は、シリンダの内周面にクロスハッチが形成されるシリンダブロック、及び、シリンダブロックに設けられるシリンダの内周面にクロスハッチを加工するホーニング加工方法に関する。
The present invention relates to a cylinder block in which a cross hatch is formed on an inner peripheral surface of a cylinder, and a honing method for processing a cross hatch on an inner peripheral surface of a cylinder provided in the cylinder block.
エンジン（内燃機関）のシリンダブロックのシリンダボア（又はシリンダライナ）には、一般的に、ホーニング加工が施される（例えば、特許文献１参照）。ホーニング加工においては、図４に示すように、砥石４１が装着されたホーニングヘッド４２を、砥石４１を拡張した状態で回転させながら上下に（シリンダボア３１の軸線方向に）移動させるようになっている。
In general, honing is performed on a cylinder bore (or cylinder liner) of a cylinder block of an engine (internal combustion engine) (see, for example, Patent Document 1). In the honing process, as shown in FIG. 4, the honing head 42 on which the grindstone 41 is mounted is moved up and down (in the axial direction of the cylinder bore 31) while rotating the grindstone 41. .
このホーニング加工により、図３に示すように、エンジンのシリンダブロック３０に設けられるシリンダボア３１の内周面にはクロスハッチと称される加工目（溝又は条痕）３２が形成される。なお、図３においてはクロスハッチ３２を簡略的に示しており、クロスハッチ３２は実際にはより目が細かく且つシリンダボア３１の内周面全体に設けられている。
By this honing process, as shown in FIG. 3, a machining stitch (groove or streak) 32 called a cross hatch is formed on the inner peripheral surface of the cylinder bore 31 provided in the cylinder block 30 of the engine. In FIG. 3, the cross hatch 32 is simply shown, and the cross hatch 32 is actually finer and provided on the entire inner peripheral surface of the cylinder bore 31.
このクロスハッチ３２は潤滑油保持のためにシリンダボア３１の内周面に設けられるが、ピストン３３（ピストンリング又はピストンスカート）の摺動に対しては抵抗となり、フリクションが発生する。そのフリクションを低減するために、図３に示すようにクロスハッチ角度（ホーニング角度とも称される）θを比較的大きくしたもの（例えば、約１４０°）も知られている。なお、クロスハッチ角度θは、一般的には、１０°から３０°の範囲内とされる。
The cross hatch 32 is provided on the inner peripheral surface of the cylinder bore 31 to retain the lubricating oil, but it resists sliding of the piston 33 (piston ring or piston skirt) and generates friction. In order to reduce the friction, a cross hatch angle (also referred to as a honing angle) θ is relatively large (for example, about 140 °) as shown in FIG. The cross hatch angle θ is generally in the range of 10 ° to 30 °.
一般的なホーニング加工方法では、図４に示すように、シリンダボア３１の軸線方向に対する送りストローク（ホーニングヘッド４２のストローク）Ｓｔが長いため、クロスハッチ３２を構成する溝３４がシリンダボア３１の上端３５から下端３６までシリンダボア３１の全長に亘って一直線に繋がっている。これはクロスハッチ角度θが比較的大きい場合も同様である。
In a general honing method, as shown in FIG. 4, the feed stroke (stroke of the honing head 42) St in the axial direction of the cylinder bore 31 is long, so the grooves 34 constituting the cross hatch 32 are formed from the upper end 35 of the cylinder bore 31. The cylinder bore 31 is connected in a straight line up to the lower end 36. This is the same when the cross hatch angle θ is relatively large.
図３に示すようにクロスハッチ角度θを比較的大きくすることにより、ピストン３３の摺動によるフリクションは低減されそうであるが、実際は却ってピストン３３の摺動によるフリクションは増加する。これはピストン３３の摺動に伴い潤滑油がクロスハッチ３２の溝３４を伝わりピストン３３の摺動方向に逃げ、摺動部（ピストン３３のストローク中央付近）では油膜厚さが薄くなってしまい、摩擦係数が上がるためであると考えられる。また、ピストン３３の摺動に伴い潤滑油がピストン３３の摺動方向に逃げてしまうのは、クロスハッチ３２の溝３４がシリンダボア３１の上端３５から下端３６までシリンダボア３１の全長に亘って一直線に繋がっているためであると考えられる。
As shown in FIG. 3, by making the cross hatch angle θ relatively large, the friction due to the sliding of the piston 33 is likely to be reduced, but the friction due to the sliding of the piston 33 actually increases. As the piston 33 slides, the lubricating oil travels along the groove 34 of the cross hatch 32 and escapes in the sliding direction of the piston 33, and the oil film thickness becomes thin at the sliding portion (near the center of the stroke of the piston 33). This is probably because the friction coefficient is increased. Further, the lubricating oil escapes in the sliding direction of the piston 33 as the piston 33 slides. The groove 34 of the cross hatch 32 extends straight from the upper end 35 to the lower end 36 of the cylinder bore 31 over the entire length of the cylinder bore 31. It is thought that it is because they are connected.
そこで、本発明の目的は、ピストンの摺動によるフリクションを低減することができるシリンダブロック及びホーニング加工方法を提供することにある。
Therefore, an object of the present invention is to provide a cylinder block and a honing method that can reduce friction caused by sliding of a piston.
上述の目的を達成するために、本発明に係るシリンダブロックは、シリンダの内周面に、クロスハッチ角度が１３０°から１５０°の範囲内とされるクロスハッチが形成されるシリンダブロックであって、前記シリンダの両端の間を延びて前記クロスハッチを構成する溝に、前記溝の途中で屈曲する少なくとも一つ以上の屈曲部を設けたものである。
In order to achieve the above object, a cylinder block according to the present invention is a cylinder block in which a cross hatch having a cross hatch angle within a range of 130 ° to 150 ° is formed on an inner peripheral surface of a cylinder. The groove that extends between both ends of the cylinder and constitutes the cross hatch is provided with at least one bent portion that is bent in the middle of the groove.
また、本発明に係るホーニング加工方法は、シリンダブロックに設けられるシリンダの内周面にクロスハッチを加工するホーニング加工方法であって、砥石が装着されたホーニングヘッドを用いて前記シリンダの両端の間を延びて前記クロスハッチを構成する溝を形成する際に、前記ホーニングヘッドを回転させながら前記シリンダの軸線方向に対して小刻みに往復移動させることにより、前記溝の途中で屈曲する屈曲部を前記溝に複数設けるものである。
The honing method according to the present invention is a honing method for machining a cross hatch on an inner peripheral surface of a cylinder provided in a cylinder block, and using a honing head equipped with a grindstone, between the both ends of the cylinder. When the groove constituting the cross hatch is formed by extending the honing head, the bent portion bent in the middle of the groove is reciprocated in small increments with respect to the axial direction of the cylinder while rotating the honing head. A plurality of grooves are provided.
本発明によれば、ピストンの摺動によるフリクションを低減することができるという優れた効果を奏する。
According to the present invention, there is an excellent effect that friction due to sliding of the piston can be reduced.
以下、本発明の好適な実施形態を添付図面に基づいて詳述する。
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
図１にシリンダブロックの概略図を示す。なお、図１においては、シリンダブロックの断面図及びシリンダボアの内周面の拡大図を示す。
Figure 1 shows a schematic diagram of the cylinder block. 1 shows a cross-sectional view of the cylinder block and an enlarged view of the inner peripheral surface of the cylinder bore.
図１に示すように、エンジン（本実施形態では、ディーゼルエンジン）のシリンダブロック１０の下部に設けられた軸受穴１１には図示しないクランクシャフトが支持され、このクランクシャフトに図示しないコネクティングロッドを介して連結されたピストン１２がシリンダボア１３内を上下に往復運動するようになっている。
As shown in FIG. 1, a crankshaft (not shown) is supported in a bearing hole 11 provided in a lower part of a cylinder block 10 of an engine (in this embodiment, a diesel engine), and a connecting rod (not shown) is supported on the crankshaft. The pistons 12 connected to each other reciprocate up and down in the cylinder bore 13.
シリンダブロック１０に設けられるシリンダを構成するシリンダボア１３の内周面には、クロスハッチ角度θが１３０°から１５０°の範囲内（例えば、約１４０°）とされるクロスハッチ１４が形成されている。クロスハッチ１４はシリンダボア１３の両端（上端１５及び下端１６）の間を延びる多数の溝１７により形成され、これら溝１７には、溝１７の途中で反対側に折り返すように屈曲するＶ字状の屈曲部１８が複数設けられている。即ち、潤滑油保持のためにシリンダボア１３の内周面に設けられるクロスハッチ１４の溝１７が、シリンダボア１３の上端１５から下端１６までシリンダボア１３の全長に亘って一直線に繋がってはいない。なお、図１においてはクロスハッチ１４を簡略的に示しており、クロスハッチ１４は実際にはより目が細かく且つシリンダボア１３の内周面全体に設けられている。
A cross hatch 14 having a cross hatch angle θ within a range of 130 ° to 150 ° (for example, about 140 °) is formed on an inner peripheral surface of a cylinder bore 13 constituting a cylinder provided in the cylinder block 10. . The cross hatch 14 is formed by a large number of grooves 17 extending between both ends (upper end 15 and lower end 16) of the cylinder bore 13, and these grooves 17 are V-shaped and bent so as to be folded back to the opposite side in the middle of the groove 17. A plurality of bent portions 18 are provided. That is, the groove 17 of the cross hatch 14 provided on the inner peripheral surface of the cylinder bore 13 for retaining lubricating oil is not connected in a straight line from the upper end 15 to the lower end 16 of the cylinder bore 13 over the entire length of the cylinder bore 13. In FIG. 1, the cross hatch 14 is simply shown, and the cross hatch 14 is actually finer and provided on the entire inner peripheral surface of the cylinder bore 13.
次に、シリンダブロック１０のホーニング加工方法を説明する。
Next, a honing method for the cylinder block 10 will be described.
図２にホーニング加工方法の説明図を示す。
Fig. 2 shows an explanatory diagram of the honing method.
図２に示すように、ホーニング加工装置２０は、シリンダブロック１０のシリンダボア１３に挿入されるホーニングヘッド２１と、ホーニングヘッド２１に装着される砥石２２とを備える。砥石２２は、シリンダボア１３の軸線方向に対する長さがシリンダボア１３の軸線方向に対して短く（シリンダボア１３の全長よりも短く）形成されている。
2, the honing apparatus 20 includes a honing head 21 inserted into the cylinder bore 13 of the cylinder block 10 and a grindstone 22 attached to the honing head 21. The grindstone 22 is formed such that the length of the cylinder bore 13 in the axial direction is shorter than the length of the cylinder bore 13 (shorter than the entire length of the cylinder bore 13).
そして、ホーニングヘッド２１を砥石２２を拡張しない状態でシリンダボア１３に挿入し、その挿入後に砥石２２を拡張する。次いで、砥石２２を拡張させた状態でホーニングヘッド２１を回転させながらシリンダボア１３の一端側から他端側（上端１５側から下端１６側、又は下端１６側から上端１５側）に移動させる送り工程と、砥石２２を拡張させた状態でホーニングヘッド２１を回転させながらシリンダボア１３の他端側から一端側に移動させる戻し工程とを順次繰り返す。即ち、砥石２２が装着されたホーニングヘッド２１を回転させながらシリンダボア１３の軸線方向に対して小刻みに上下移動させることにより、溝１７の途中で反対側に折り返すように屈曲するＶ字状の屈曲部１８を有する溝１７（クロスハッチ１４）をシリンダボア１３の内周面に形成することが可能である。
Then, the honing head 21 is inserted into the cylinder bore 13 without expanding the grindstone 22, and the grindstone 22 is expanded after the insertion. Next, a feeding step of moving the honing head 21 from one end side to the other end side (from the upper end 15 side to the lower end 16 side or from the lower end 16 side to the upper end 15 side) while rotating the honing head 21 with the grindstone 22 expanded. The return step of moving the honing head 21 from the other end side to the one end side while rotating the honing head 21 with the grindstone 22 expanded is sequentially repeated. That is, a V-shaped bent portion that is bent so as to be folded back in the middle of the groove 17 by moving the honing head 21 on which the grindstone 22 is mounted up and down in small increments relative to the axial direction of the cylinder bore 13. A groove 17 (cross hatch 14) having 18 can be formed on the inner peripheral surface of the cylinder bore 13.
ホーニングヘッド２１の送り工程における送りストロークＳｔ１は、シリンダボア１３の全長の５分の１程度の長さとされ、例えば約２０ｍｍとされる。また、ホーニングヘッド２１の戻し工程における送りストロークＳｔ２は、送り工程における送りストロークＳｔ１の半分程度の長さとされ、例えば約１０ｍｍとされる。
The feed stroke St1 in the feed process of the honing head 21 is about one-fifth of the entire length of the cylinder bore 13, for example, about 20 mm. Further, the feed stroke St2 in the returning process of the honing head 21 is about half the length of the feed stroke St1 in the feed process, for example, about 10 mm.
次に、本実施形態の作用効果を説明する。
Next, the function and effect of this embodiment will be described.
本実施形態では、クロスハッチ１４を構成する溝１７に、溝１７の途中で屈曲する屈曲部１８を複数設けているので、クロスハッチ１４がシリンダボア１３の上端１５から下端１６までシリンダボア１３の全長に亘って一直線に繋がることはなく、ピストン１２の摺動に伴い潤滑油がクロスハッチ１４の溝１７を伝わりピストン１２の摺動方向に逃げてしまうことを抑制することができる。そのため、シリンダボア１３の内周面とピストンリング又はピストンスカートとの間は正常に潤滑油により潤滑され、摺動部（ピストン１２のストローク中央付近）でも、十分な油膜厚さとすることができる。したがって、クロスハッチ角度θが大きくなった分、シリンダボア１３の内周面とピストンリング又はピストンスカートとの間のフリクションが低減され、全体としてピストン１２の摺動によるフリクションが低減される。
In the present embodiment, since the groove 17 constituting the cross hatch 14 is provided with a plurality of bent portions 18 that are bent in the middle of the groove 17, the cross hatch 14 extends from the upper end 15 to the lower end 16 of the cylinder bore 13 over the entire length of the cylinder bore 13. It is not connected in a straight line, and it is possible to prevent the lubricating oil from passing through the groove 17 of the cross hatch 14 and escaping in the sliding direction of the piston 12 as the piston 12 slides. Therefore, the space between the inner peripheral surface of the cylinder bore 13 and the piston ring or piston skirt is normally lubricated by the lubricating oil, and a sufficient oil film thickness can be obtained even at the sliding portion (near the stroke center of the piston 12). Therefore, the friction between the inner peripheral surface of the cylinder bore 13 and the piston ring or the piston skirt is reduced by the increase in the cross hatch angle θ, and the friction due to the sliding of the piston 12 is reduced as a whole.
以上要するに、本実施形態により、ピストンの摺動によるフリクションを低減することができる。
In short, according to this embodiment, friction due to piston sliding can be reduced.
以上、本発明の好適な実施形態について説明したが、本発明は上述の実施形態には限定されず他の様々な実施形態を採ることが可能である。
The preferred embodiments of the present invention have been described above, but the present invention is not limited to the above-described embodiments, and various other embodiments can be adopted.
例えば、クロスハッチの溝の途中に設ける屈曲部の数は、図１に示すものには限定はされず、シリンダの全長やピストンのストローク等に応じて適宜設定することが可能である。
For example, the number of bent portions provided in the middle of the cross hatch groove is not limited to that shown in FIG. 1, and can be set as appropriate according to the overall length of the cylinder, the stroke of the piston, and the like.
また、本発明は、シリンダボアだけではなく、シリンダライナへも適用可能である。
Further, the present invention can be applied not only to the cylinder bore but also to the cylinder liner.
さらに、本発明は、ディーゼルエンジンのシリンダブロックだけではなく、ガソリンエンジン等のシリンダブロックへも適用可能である。
Furthermore, the present invention can be applied not only to a cylinder block of a diesel engine but also to a cylinder block of a gasoline engine or the like.
１０ シリンダブロック
１３ シリンダボア（シリンダ）
１４ クロスハッチ
１７ 溝
１８ 屈曲部
θ クロスハッチ角度 10Cylinder block 13 Cylinder bore (cylinder)
14 Crosshatch 17 Groove 18 Bent part θ Cross hatch angle
１３ シリンダボア（シリンダ）
１４ クロスハッチ
１７ 溝
１８ 屈曲部
θ クロスハッチ角度 10
14 Cross
Claims (2)
- シリンダの内周面に、クロスハッチ角度が１３０°から１５０°の範囲内とされるクロスハッチが形成されるシリンダブロックであって、
前記シリンダの両端の間を延びて前記クロスハッチを構成する溝に、前記溝の途中で屈曲する少なくとも一つ以上の屈曲部を設けたことを特徴とするシリンダブロック。 A cylinder block in which a cross hatch having a cross hatch angle within a range of 130 ° to 150 ° is formed on the inner peripheral surface of the cylinder,
A cylinder block characterized in that at least one bent portion that is bent in the middle of the groove is provided in a groove that extends between both ends of the cylinder and constitutes the cross hatch. - シリンダブロックに設けられるシリンダの内周面にクロスハッチを加工するホーニング加工方法であって、
砥石が装着されたホーニングヘッドを用いて前記シリンダの両端の間を延びて前記クロスハッチを構成する溝を形成する際に、前記ホーニングヘッドを回転させながら前記シリンダの軸線方向に対して小刻みに往復移動させることにより、前記溝の途中で屈曲する屈曲部を前記溝に複数設けることを特徴とするホーニング加工方法。 A honing method for machining a cross hatch on an inner peripheral surface of a cylinder provided in a cylinder block,
When a honing head mounted with a grindstone is used to form a groove constituting the cross hatch by extending between both ends of the cylinder, the honing head is rotated and reciprocated in small increments with respect to the axial direction of the cylinder. A honing method, wherein a plurality of bent portions that are bent in the middle of the groove are provided in the groove by being moved.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012-236752 | 2012-10-26 | ||
| JP2012236752A JP6111598B2 (en) | 2012-10-26 | 2012-10-26 | Cylinder block and honing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2014065156A1 true WO2014065156A1 (en) | 2014-05-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2013/077941 WO2014065156A1 (en) | 2012-10-26 | 2013-10-15 | Cylinder block and honing method |
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| JP (1) | JP6111598B2 (en) |
| WO (1) | WO2014065156A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020084916A (en) * | 2018-11-28 | 2020-06-04 | Ｔｐｒ株式会社 | Cylinder liner and manufacturing method thereof |
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| JPS59196954A (en) * | 1983-04-22 | 1984-11-08 | Riken Corp | Cylinder and cylinder liner for internal-combustion engine |
| JPS6065357U (en) * | 1983-10-13 | 1985-05-09 | 本田技研工業株式会社 | internal combustion engine cylinder liner |
| JPH06280858A (en) * | 1993-03-29 | 1994-10-07 | Koyo Seiko Co Ltd | Dynamic pressure bearing |
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| JP2020084916A (en) * | 2018-11-28 | 2020-06-04 | Ｔｐｒ株式会社 | Cylinder liner and manufacturing method thereof |
| WO2020110366A1 (en) * | 2018-11-28 | 2020-06-04 | Ｔｐｒ株式会社 | Cylinder liner and manufacturing method for same |
| RU2764951C1 (en) * | 2018-11-28 | 2022-01-24 | Тпр Ко., Лтд. | Cylinder liner and method for its manufacture |
| US11499498B2 (en) | 2018-11-28 | 2022-11-15 | Tpr Co., Ltd. | Cylinder liner and manufacturing method for same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2014084842A (en) | 2014-05-12 |
| JP6111598B2 (en) | 2017-04-12 |
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