Deprecated: The each() function is deprecated. This message will be suppressed on further calls in /home/zhenxiangba/zhenxiangba.com/public_html/phproxy-improved-master/index.php on line 456
JP5962078B2 - Cylinder block and pre-spraying method - Google Patents
[go: Go Back, main page]

JP5962078B2 - Cylinder block and pre-spraying method - Google Patents

Cylinder block and pre-spraying method Download PDF

Info

Publication number
JP5962078B2
JP5962078B2 JP2012049200A JP2012049200A JP5962078B2 JP 5962078 B2 JP5962078 B2 JP 5962078B2 JP 2012049200 A JP2012049200 A JP 2012049200A JP 2012049200 A JP2012049200 A JP 2012049200A JP 5962078 B2 JP5962078 B2 JP 5962078B2
Authority
JP
Japan
Prior art keywords
thermal spray
spray coating
rough surface
adhesion
coating
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.)
Active
Application number
JP2012049200A
Other languages
Japanese (ja)
Other versions
JP2013185169A (en
Inventor
良次 熨斗
良次 熨斗
大輔 寺田
大輔 寺田
精一 杉山
精一 杉山
孝文 渡辺
孝文 渡辺
雅敏 井野口
雅敏 井野口
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nissan Motor Co Ltd
Original Assignee
Nissan Motor Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nissan Motor Co Ltd filed Critical Nissan Motor Co Ltd
Priority to JP2012049200A priority Critical patent/JP5962078B2/en
Priority to PCT/JP2013/055094 priority patent/WO2013133098A1/en
Publication of JP2013185169A publication Critical patent/JP2013185169A/en
Application granted granted Critical
Publication of JP5962078B2 publication Critical patent/JP5962078B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • 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
    • C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
    • C23C4/14—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying for coating elongate material
    • 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
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Coating By Spraying Or Casting (AREA)

Description

本発明は、シリンダボア内面に対し、溶射皮膜を形成する前に粗面が形成されたシリンダブロック及び溶射前処理方法に関する。 The present invention relates to a cylinder block in which a rough surface is formed on a cylinder bore inner surface before forming a sprayed coating, and a spraying pretreatment method.

自動車などの内燃機関用シリンダブロックのシリンダボア内面に、溶融した金属材料を付着させて溶射皮膜を形成する溶射技術が知られている。その際、シリンダボア内面に対する溶射皮膜の密着力を高めるために、溶射皮膜を形成する前にシリンダボア内面を、機械加工やショットブラスト加工によって粗面に形成する場合がある（下記特許文献１参照）。   A thermal spraying technique is known in which a molten metal material is attached to the inner surface of a cylinder bore of a cylinder block for an internal combustion engine such as an automobile to form a thermal spray coating. At this time, in order to increase the adhesion of the spray coating to the cylinder bore inner surface, the cylinder bore inner surface may be formed into a rough surface by machining or shot blasting before forming the spray coating (see Patent Document 1 below).

特開２００６−１５９３８９号公報JP 2006-159389 A

ところで、溶射皮膜を形成する際には、通常溶融状態の金属を溶射ガンのノズルから噴射させることになるが、その際、噴射した溶融金属が、溶射皮膜が必要となるシリンダボア内面以外の部分にも付着する場合がある。このような場合、シリンダボア内面以外の部分に付着した溶融金属は、特に粗面化していないことから脱落し、脱落した皮膜片がシリンダボア内面に形成する溶射皮膜中に混入し、溶射皮膜の品質低下を招く。   By the way, when forming a sprayed coating, the molten metal is usually sprayed from the nozzle of the spray gun, and at that time, the sprayed molten metal is applied to a portion other than the inner surface of the cylinder bore where the sprayed coating is required. May also adhere. In such a case, the molten metal adhering to the part other than the inner surface of the cylinder bore falls off because it is not particularly roughened, and the dropped coating pieces are mixed into the thermal spray coating formed on the inner surface of the cylinder bore, resulting in a deterioration in the quality of the thermal spray coating. Invite.

そこで、本発明は、溶射皮膜を形成する必要がない部分に溶射用材料が付着しても、該付着した溶融用材料の脱落を抑制して高品質な溶射皮膜を得ることを目的としている。   In view of the above, an object of the present invention is to obtain a high-quality sprayed coating by suppressing the dropping of the adhering melting material even if the spraying material adheres to a portion where it is not necessary to form the sprayed coating.

本発明は、シリンダボア内面の溶射皮膜を形成する部分が溶射皮膜の密着力が高い凹凸を有する粗面に形成され、溶射皮膜を形成する必要のない部分は、シリンダボア内面に対してクランクケース側に直線的に連続するストレート部を有し、前記ストレート部は、前記溶射皮膜を形成する部分の前記凹凸を有する粗面よりも平滑な凹凸を有する粗面に形成され、前記ストレート部を有する前記溶射皮膜を形成する必要のない部分の粗面の箇所の溶射用材料の密着力が、前記溶射皮膜を形成する部分の溶射用材料の密着力より弱く、前記ストレート部を有する前記溶射皮膜を形成する必要のない部分の前記粗面は、前記溶射皮膜を形成する部分への溶射時に飛散した溶射用材料の一部が付着する粗さを備えたシリンダブロックにおいて、前記溶射皮膜を形成する必要のない部分は、前記ストレート部の前記シリンダボア内面と反対側にてシリンダボアの中心側に向けて径方向に延びる張り出し部を有し、前記張り出し部は、前記溶射皮膜を形成する部分の前記溶射皮膜の密着力が高い前記凹凸を有する粗面よりも平滑な凹凸を有する粗面に形成され、前記張り出し部を有する前記溶射皮膜を形成する必要のない部分の粗面の箇所の溶射用材料の密着力が、前記溶射皮膜を形成する部分の溶射用材料の密着力より弱く、前記張り出し部を有する前記溶射皮膜を形成する必要のない部分の前記粗面は、前記溶射皮膜を形成する部分への溶射時に飛散した溶射用材料の一部が付着する粗さを備えていることを特徴とする。 The present invention is formed on the rough surface portion forming a thermal spray coating of the cylinder bore inner surface has a concave convex adhesion is high thermal spray coating, need not part forming the thermal spray coating, the crank case side against internal cylindrical surface It has a straight portion which linearly continuous, the straight portion is formed in a rough surface having a smooth concave convex than rough surface having the concavo-convex part forming the sprayed coating, the straight portion the adhesion of the thermal spraying material portions of the rough surface of the necessary portion without forming a thermal sprayed coating, rather weakly than the adhesion of the thermal spray material of the part forming the thermal spray coating having the spray having the straight portion In the cylinder block having a roughness to which a part of the thermal spray material scattered during the thermal spraying on the portion where the thermal spray coating is to be deposited is provided on the rough surface where the coating is not required. The portion that does not need to form a coating has a protruding portion that extends in the radial direction toward the center of the cylinder bore on the opposite side of the cylinder bore inner surface of the straight portion, and the protruding portion forms the sprayed coating. The portion of the rough surface of the portion that is formed on the rough surface having unevenness that is smoother than the rough surface having the unevenness that has high adhesion to the portion of the sprayed coating and that does not require the formation of the sprayed coating having the overhanging portion. The adhesion of the thermal spray material is weaker than the adhesion of the part of the thermal spray material that forms the thermal spray coating, and the rough surface of the portion that does not need to form the thermal spray coating with the overhanging portion is formed by applying the thermal spray coating. It is characterized in that it has a roughness to which a part of the spraying material scattered at the time of spraying on the part to be formed adheres .

本発明によれば、溶射皮膜を形成する必要のない部分も粗面に形成された箇所を有することで、溶射皮膜を形成する必要のない部分に付着した溶射用材料の脱落を抑制でき、脱落による溶射用材料の溶射皮膜への混入を抑制して、高品質な溶射皮膜を得ることができる。   According to the present invention, the part that does not need to form the thermal spray coating also has a portion formed on the rough surface, so that the spraying material adhering to the part that does not need to form the thermal spray coating can be prevented from falling off. It is possible to obtain a high-quality thermal spray coating by suppressing the mixing of the thermal spray material into the thermal spray coating.

本発明の一実施形態に係わる溶射前処理形状を備えるシリンダブロックの部分断面図である。It is a fragmentary sectional view of a cylinder block provided with the thermal spraying pretreatment shape concerning one embodiment of the present invention. 図１のシリンダブロックのシリンダボア面を粗面に形成する状態を示す作用説明図である。It is action explanatory drawing which shows the state which forms the cylinder bore surface of the cylinder block of FIG. 1 in a rough surface. 図１のシリンダブロックのシリンダボア面に溶射皮膜を形成する状態を示す作用説明図である。FIG. 2 is an operation explanatory view showing a state in which a thermal spray coating is formed on a cylinder bore surface of the cylinder block of FIG. 1. 溶射皮膜に対してホーニング加工を行う状態を示す作用説明図である。It is effect | action explanatory drawing which shows the state which performs a honing process with respect to a thermal spray coating. 溶射皮膜を形成する必要のない部分に対してローレット加工を行う状態を示す作用説明図で、（ａ），（ｂ），（ｃ）は、それぞれ平滑面、Ｒ部、張り出し部に対してローレット加工を行う状態を示す。It is operation | movement explanatory drawing which shows the state which knurles with respect to the part which does not need to form a sprayed coating, (a), (b), (c) is a knurl with respect to a smooth surface, R part, and an overhang | projection part, respectively. The state which processes is shown.

以下、本発明の実施の形態を図面に基づき説明する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings.

図１に示す、本発明の一実施形態に係わる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って、その円筒状部材としてのシリンダボア３のシリンダボア内面３ａを粗面に形成してある。粗面の形成は、図２に示すように、図示しないボーリングバーに取り付けた切削加工用のチップ５を用いてねじ切加工する。   A cylinder block 1 of an engine according to an embodiment of the present invention shown in FIG. 1 is made of an aluminum alloy, and a cylinder bore inner surface 3a of a cylinder bore 3 as a cylindrical member is formed on a rough surface. As shown in FIG. 2, the rough surface is formed by threading using a cutting tip 5 attached to a boring bar (not shown).

上記粗面に形成したシリンダボア内面３ａは、後述する溶射ガン７（図３）を用いて鉄系材料で構成される溶射皮膜１１を形成する部分であり、この溶射皮膜１１を形成した部分に対し図示しないエンジンのピストンが摺動する。このシリンダボア内面３ａに対し、図２中で下部側に位置するクランクケース側に直線的に連続する連続するストレート部としての平滑面３ｂが形成されている。この平滑面３ｂは、シリンダボア３の内径を計測するために表面を平滑化してある。内径を計測することで、その後形成する溶射皮膜１１の膜厚を管理する。   The cylinder bore inner surface 3a formed on the rough surface is a portion where a thermal spray coating 11 composed of an iron-based material is formed using a thermal spray gun 7 (FIG. 3) described later, and the portion where the thermal spray coating 11 is formed. An engine piston (not shown) slides. On the cylinder bore inner surface 3a, a smooth surface 3b is formed as a continuous straight portion linearly continuous on the crankcase side located on the lower side in FIG. The smooth surface 3b is smoothed to measure the inner diameter of the cylinder bore 3. By measuring the inner diameter, the film thickness of the thermal spray coating 11 formed thereafter is managed.

平滑面３ｂの下端からはシリンダボア３の内側に向けて湾曲したＲ部３ｃが形成され、さらにＲ部３ｃからシリンダボア３の中心側に向けて径方向に延びる張り出し部３ｄが形成されている。張り出し部３ｄは、平滑面３ｂに対してほぼ９０度の角度に形成されている。これら平滑面３ｂ、Ｒ部３ｃ及び、張り出し部３ｄは、溶射皮膜を形成する必要のない部分に相当する。   An R portion 3c that is curved toward the inside of the cylinder bore 3 is formed from the lower end of the smooth surface 3b, and an overhang portion 3d that extends in the radial direction from the R portion 3c toward the center of the cylinder bore 3 is formed. The protruding portion 3d is formed at an angle of approximately 90 degrees with respect to the smooth surface 3b. The smooth surface 3b, the R portion 3c, and the overhang portion 3d correspond to portions where it is not necessary to form a sprayed coating.

そして、本実施形態では、上記した平滑面３ｂでの内径測定後に、平滑面３ｂ、Ｒ部３ｃ及び、張り出し部３ｄからなる、溶射皮膜を形成する必要のない部分も、図１に示したように粗面に形成する。粗面に形成する加工方法については、後述する。   In the present embodiment, after the inner diameter measurement on the smooth surface 3b described above, the portion including the smooth surface 3b, the R portion 3c, and the overhang portion 3d that does not need to form a sprayed coating is also shown in FIG. To form a rough surface. A processing method for forming the rough surface will be described later.

溶射皮膜を必要とするシリンダボア内面３ａ及び、溶射皮膜を必要としない部分３ｂ，３ｃ，３ｄを、それぞれ粗面に形成した後は、図３に示すように溶射ガン７から噴射する溶射金属の液滴９をシリンダボア内面３ａに付着させて溶射皮膜１１を形成する。このとき、溶射ガン７は回転しつつシリンダボア３に軸線方向に移動することで、シリンダボア内面３ａの全域にわたり溶射皮膜１１を形成する。 After forming the cylinder bore inner surface 3a that requires the spray coating and the portions 3b, 3c, and 3d that do not require the spray coating on the rough surfaces, as shown in FIG. 3, the sprayed metal 7 sprayed from the spray gun 7 is used. A droplet 9 is adhered to the cylinder bore inner surface 3a to form a sprayed coating 11. At this time, the spray gun 7 moves in the axial direction to the cylinder bore 3 while rotating, thereby forming the spray coating 11 over the entire area of the cylinder bore inner surface 3a.

その際、溶射皮膜を形成する必要のない部分３ｂ，３ｃ，３ｄにも液滴９の一部が飛散して溶融金属が付着するが、溶射皮膜を形成する必要のない部分３ｂ，３ｃ，３ｄも粗面に形成しているので、付着した溶融金属材料の脱落や剥離を抑えることができる。その結果、シリンダボア内面３ａに形成する溶射皮膜１１は、溶融金属材料の脱落片の混入が抑制されて品質低下を抑えることができ、高品質な溶射皮膜１１を得ることができる。   At that time, a part of the droplet 9 is scattered and the molten metal adheres to the portions 3b, 3c, 3d that do not need to form the sprayed coating, but the portions 3b, 3c, 3d that do not need to form the sprayed coating. Is formed on the rough surface, it is possible to prevent the attached molten metal material from dropping off or peeling off. As a result, the sprayed coating 11 formed on the cylinder bore inner surface 3a can suppress the deterioration of the quality by preventing the molten metal material from falling off and can obtain a high-quality sprayed coating 11.

溶射皮膜１１の形成後は、図４に示すように、溶射皮膜１１に対し、ホーニングヘッド１３に設けた砥石１５を用いて仕上げのホーニング加工を実施する。   After the formation of the thermal spray coating 11, a finishing honing process is performed on the thermal spray coating 11 using a grindstone 15 provided on the honing head 13.

また、シリンダボア内面３ａの粗面化による粗さはＲｚ＝１００μｍで、溶射皮膜を形成する必要のない部分３ｂ，３ｃ，３ｄの粗面化による粗さはＲｚ＝３０μｍとして、前者の溶射用材料の密着力を後者の溶射用材料の密着力より強くする。   Further, the roughness due to the roughening of the cylinder bore inner surface 3a is Rz = 100 μm, and the roughness due to the roughening of the portions 3b, 3c, 3d where the spray coating is not required is Rz = 30 μm. Is made stronger than that of the latter thermal spray material.

つまり、ピストン摺動面となるシリンダボア内面３ａの溶射皮膜１１の密着力を高めることが重要であり、そのため、シリンダボア内面３ａの粗面化加工は、より深くまたより細かくする必要があり、加工に時間を費やすことが必然となる。一方、溶射皮膜を形成する必要のない部分３ｂ，３ｃ，３ｄは、ピストンが摺動するわけではないので、シリンダボア内面３ａほどに溶射皮膜（溶射用材料）の密着力を高める必要がなく、そのため、粗面化加工に多くの時間を費やす必要がなく、加工は簡素化することが可能となる。   In other words, it is important to increase the adhesion of the thermal spray coating 11 on the cylinder bore inner surface 3a that serves as the piston sliding surface. Therefore, the roughening of the cylinder bore inner surface 3a needs to be deeper and finer. It will be necessary to spend time. On the other hand, the portions 3b, 3c, and 3d that do not need to form a sprayed coating do not slide the piston, and therefore it is not necessary to increase the adhesion of the sprayed coating (spraying material) as much as the cylinder bore inner surface 3a. Therefore, it is not necessary to spend a lot of time for the roughening process, and the process can be simplified.

すなわち、溶射皮膜を形成する必要のない部分の粗面を、溶射皮膜を形成する必要のある部分の粗面より平滑化して、溶射皮膜を形成する必要のない部分の溶射用材料の密着力を、溶射皮膜を形成する必要のある部分の溶射用材料の密着力より弱くしている。   That is, the rough surface of the portion that does not need to form the thermal spray coating is smoothed from the rough surface of the portion that needs to form the thermal spray coating, so that the adhesion of the thermal spray material in the portion that does not need to form the thermal spray coating is increased. The adhesion of the material for thermal spraying in the portion where the thermal spray coating needs to be formed is weaker.

これにより、溶射皮膜を形成する必要のない部分３ｂ，３ｃ，３ｄに対する粗面化の加工時間を短縮でき、加工コストを抑えることができる。   Thereby, the processing time of the roughening with respect to the part 3b, 3c, 3d which does not need to form a sprayed coating can be shortened, and processing cost can be held down.

なお、溶射皮膜を形成する必要のない部分３ｂ，３ｃ，３ｄのうち、シリンダボア内面３ａに直接連続して近い位置にある平滑面３ｂのみを粗面に形成してもよい。これにより、シリンダボア内面３ａに対して平滑面３ｂより遠い位置にあるＲ部３ｃや張り出し部３ｄに比較して、溶射金属がより付着しやすい平滑面３ｂに付着した溶射用材料の脱落を効率よく抑えることができる。   Of the portions 3b, 3c, and 3d that do not require the formation of a thermal spray coating, only the smooth surface 3b that is in a position that is directly and continuously close to the cylinder bore inner surface 3a may be formed as a rough surface. As a result, compared to the R portion 3c and the overhang portion 3d which are located farther from the smooth surface 3b than the cylinder bore inner surface 3a, the spraying material adhering to the smooth surface 3b to which the spray metal is more likely to adhere is more efficiently removed. Can be suppressed.

ここで、溶射加工する際には、図３のようにクランクケース側が下部となる状態でシリンダボア３の軸線を上下方向として行う。その際、飛散した溶射用材料の一部は、溶射加工時に水平面となる張り出し部３ｄ上に落下するので、水平面に対して鉛直面となる平滑面３ｂほどに密着力を強く必要がない。   Here, when thermal spraying is performed, the axis of the cylinder bore 3 is set in the vertical direction with the crankcase side at the bottom as shown in FIG. At this time, since a part of the sprayed material that has been scattered falls on the overhanging portion 3d that becomes a horizontal plane during the thermal spraying process, it is not necessary to have a stronger adhesion than the smooth surface 3b that is a vertical plane with respect to the horizontal plane.

このため、平滑面３ｂ及び張り出し部３ｄを粗面化する際に、平滑面３ｂの粗面を、張り出し部３ｄの粗面より細かくして、平滑面３ｂでの溶射用材料の密着力を強くすることが望ましい。   For this reason, when roughening the smooth surface 3b and the overhang portion 3d, the rough surface of the smooth surface 3b is made finer than the rough surface of the overhang portion 3d so that the adhesion of the thermal spray material on the smooth surface 3b is increased. It is desirable to do.

これにより、張り出し部３ｄの粗面化加工については、平滑面３ｂに対する粗面化加工ほどに加工時間を多く費やす必要がなく、粗面化加工全体の加工時間を短縮でき、加工コストを抑えることができる。   As a result, it is not necessary to spend as much processing time as the surface roughening on the smooth surface 3b for the surface roughening of the overhang portion 3d, and the processing time of the entire surface roughening can be shortened and the processing cost can be reduced. Can do.

溶射皮膜を形成する必要のない部分３ｂ，３ｃ，３ｄに対する粗面化加工は、例えばローレット加工で行う。図５（ａ），（ｂ），（ｃ）は、それぞれ平滑面３ｂ、Ｒ部３ｃ、張り出し部３ｄに対してローレット加工を実施している状態を示す。   The roughening process for the portions 3b, 3c, and 3d that do not require the formation of a sprayed coating is performed, for example, by knurling. 5A, 5B, and 5C show a state in which knurling is performed on the smooth surface 3b, the R portion 3c, and the overhang portion 3d, respectively.

図５（ａ）の平滑面３ｂの加工に使用するローレット工具１７Ａは、その回転中心軸１９Ａをシリンダボア３の軸心と平行とする。図５（ｂ）のＲ部３ｃの加工に使用するローレット工具１７Ｂは、外周面をＲ部３ｃの湾曲形状に合わせて湾曲させ、その回転中心軸１９Ｂをシリンダボア３の軸心に対して傾斜させる。図５（ｃ）の張り出し部３ｄの加工に使用するローレット工具１７Ｃは、その回転中心軸１９Ｃをシリンダボア３の径方向と平行にする。   The knurled tool 17 </ b> A used for machining the smooth surface 3 b in FIG. 5A makes its rotation center axis 19 </ b> A parallel to the axis of the cylinder bore 3. The knurled tool 17B used for processing the R portion 3c in FIG. 5B is configured such that the outer peripheral surface is curved in accordance with the curved shape of the R portion 3c, and the rotation center shaft 19B is inclined with respect to the axis of the cylinder bore 3. . The knurl tool 17C used for machining the projecting portion 3d in FIG. 5C makes its rotation center axis 19C parallel to the radial direction of the cylinder bore 3.

なお、これら溶射皮膜を形成する必要のない部分３ｂ，３ｃ，３ｄは、いずれもその全部（全域）を粗面化してもよいが、いずれもその一部の箇所を粗面化してもよい。すなわち、これら溶射皮膜を形成する必要のない部分３ｂ，３ｃ，３ｄも粗面に形成された箇所を有する。   Note that all of the portions 3b, 3c, 3d that do not require the formation of the sprayed coating may be roughened (all areas), but any of the portions may be roughened. That is, the portions 3b, 3c, and 3d that do not need to form the sprayed coating also have portions formed on the rough surface.

また、これら溶射皮膜を形成する必要のない部分３ｂ，３ｃ，３ｄに対する粗面化加工は、上記したローレット加工に限ることはなく、例えばショットブラスト加工で行なってもよい。ショットブラスト加工を行う場合には、事前に粗面化加工が終了しているシリンダボア内面３ａの粗面化面にショット玉が当たらないように適宜保護部材を用いて保護することが望ましい。   Further, the roughening process for the portions 3b, 3c, and 3d that do not require the formation of the sprayed coating is not limited to the knurling process, and may be performed by, for example, a shot blast process. When performing shot blasting, it is desirable to protect with a protective member as appropriate so that shot balls do not hit the roughened surface of the cylinder bore inner surface 3a that has been previously roughened.

また、平滑面３ｂに対する粗面化加工は、シリンダボア内面３ａと同様にねじ切加工で行なってもよく、張り出し部３ｄに対する粗面化加工は、フェーシング加工で行なうこともできる。   Further, the roughening process on the smooth surface 3b may be performed by threading as in the cylinder bore inner surface 3a, and the roughening process on the projecting portion 3d may be performed by facing process.

１ シリンダブロック（円筒状部材）
３ａ シリンダボア内面（円筒状部材の内面、溶射皮膜を形成する部分）
３ｂ 平滑面（ストレート部、溶射皮膜を形成する必要のない部分）
３ｃ Ｒ部（溶射皮膜を形成する必要のない部分）
３ｄ 張り出し部（溶射皮膜を形成する必要のない部分）
１１ 溶射皮膜 1 Cylinder block (cylindrical member)
3a Cylinder bore inner surface (the inner surface of the cylindrical member, the portion where the thermal spray coating is formed)
3b Smooth surface (straight part, part that does not require the formation of a thermal spray coating)
3c R part (part which does not need to form sprayed coating)
3d overhanging part (part that does not require spray coating)
11 Thermal spray coating

Claims (4)

シリンダボア内面に対し、溶射皮膜を形成する前に、溶射皮膜の密着力を高めるための凹凸を有する粗面が形成され、
前記シリンダボア内面の溶射皮膜を形成する部分が前記溶射皮膜の密着力が高い凹凸を有する粗面に形成され、
前記溶射皮膜を形成する必要のない部分は、前記シリンダボア内面に対してクランクケース側に直線的に連続するストレート部を有し、
前記ストレート部は、前記溶射皮膜を形成する部分の前記溶射皮膜の密着力が高い前記凹凸を有する粗面よりも平滑な凹凸を有する粗面に形成され、
前記ストレート部を有する前記溶射皮膜を形成する必要のない部分の粗面の箇所の溶射用材料の密着力が、前記溶射皮膜を形成する部分の溶射用材料の密着力より弱く、
前記ストレート部を有する前記溶射皮膜を形成する必要のない部分の前記粗面は、前記溶射皮膜を形成する部分への溶射時に飛散した溶射用材料の一部が付着する粗さを備えたシリンダブロックにおいて、
前記溶射皮膜を形成する必要のない部分は、前記ストレート部の前記シリンダボア内面と反対側にてシリンダボアの中心側に向けて径方向に延びる張り出し部を有し、
前記張り出し部は、前記溶射皮膜を形成する部分の前記溶射皮膜の密着力が高い前記凹凸を有する粗面よりも平滑な凹凸を有する粗面に形成され、
前記張り出し部を有する前記溶射皮膜を形成する必要のない部分の粗面の箇所の溶射用材料の密着力が、前記溶射皮膜を形成する部分の溶射用材料の密着力より弱く、
前記張り出し部を有する前記溶射皮膜を形成する必要のない部分の前記粗面は、前記溶射皮膜を形成する部分への溶射時に飛散した溶射用材料の一部が付着する粗さを備えていることを特徴とするシリンダブロック。 Before forming the thermal spray coating on the cylinder bore inner surface, a rough surface having irregularities for increasing the adhesion of the thermal spray coating is formed ,
Portion forming a thermal spray coating of said internal cylindrical surface is formed on the rough surface having a concave convex adhesion is high the thermal spray coating,
The portion without the need to form a thermal spray coating, have a straight portion continuous linearly on the crankcase side with respect to the internal cylindrical surface,
The straight portion is formed in a rough surface having a smooth concave convex than rough surface having the uneven adhesion is high of the spray coating portions forming the sprayed coating,
The adhesion of the thermal spraying material portions of the rough surface of the unnecessary portion for forming a thermal spray coating having a straight section, rather weakly than the adhesion of the thermal spray material of the part forming the sprayed coating,
A cylinder block having a roughness to which a portion of the sprayed material scattered during spraying on the portion where the thermal spray coating is formed is attached to the rough surface of the portion having the straight portion which is not required to form the thermal spray coating. In
The portion that does not need to form the sprayed coating has a projecting portion that extends in the radial direction toward the center side of the cylinder bore on the side opposite to the cylinder bore inner surface of the straight portion,
The projecting portion is formed on a rough surface having unevenness that is smoother than the rough surface having the unevenness that has high adhesion of the thermal spray coating on the portion that forms the thermal spray coating,
The adhesion of the thermal spray material in the portion of the rough surface of the portion that does not need to form the thermal spray coating having the overhang portion is weaker than the adhesion of the thermal spray material in the portion forming the thermal spray coating,
The rough surface of the portion that does not need to form the thermal spray coating having the overhanging portion has a roughness to which a part of the thermal spray material scattered during spraying to the portion forming the thermal spray coating adheres. Cylinder block characterized by 前記ストレート部は、ねじ切り加工されてなる粗面を有し、前記張り出し部は、フェーシング加工されてなる粗面を有することを特徴とする請求項１に記載のシリンダブロック。2. The cylinder block according to claim 1, wherein the straight portion has a rough surface formed by threading, and the protruding portion has a rough surface formed by facing. 3. シリンダボア内面に対し、溶射皮膜を形成する前に、前記溶射皮膜の密着力を高めるための凹凸を有する粗面を形成するに際し、
前記シリンダボア内面の溶射皮膜を形成する部分を粗面化加工により前記溶射皮膜の密着力が高い凹凸を有する粗面に形成し、
前記溶射皮膜を形成する必要のない部分は、前記シリンダボア内面に対してクランクケース側に直線的に連続するストレート部を有し、
前記ストレート部を、前記溶射皮膜を形成する部分の前記溶射皮膜の密着力が高い前記凹凸を有する粗面よりも平滑な、粗面化加工による凹凸を有する粗面に形成し、
前記ストレート部を有する前記溶射皮膜を形成する必要のない部分の前記粗面が、前記溶射皮膜を形成する部分への溶射時に飛散した溶射用材料の一部が付着する粗さとなるように、
前記ストレート部を有する前記溶射皮膜を形成する必要のない部分に形成された粗面の箇所の溶射用材料の密着力を、溶射皮膜を形成する部分の溶射用材料の密着力より弱くした溶射前処理方法において、
前記溶射皮膜を形成する必要のない部分は、前記ストレート部の前記シリンダボア内面と反対側にてシリンダボアの中心側に向けて径方向に延びる張り出し部を有し、
前記張り出し部を、前記溶射皮膜を形成する部分の前記溶射皮膜の密着力が高い前記凹凸を有する粗面よりも平滑な、粗面化加工による凹凸を有する粗面に形成し、
前記張り出し部を有する前記溶射皮膜を形成する必要のない部分の前記粗面が、前記溶射皮膜を形成する部分への溶射時に飛散した溶射用材料の一部が付着する粗さとなるように、
前記張り出し部を有する前記溶射皮膜を形成する必要のない部分に形成された粗面の箇所の溶射用材料の密着力を、溶射皮膜を形成する部分の溶射用材料の密着力より弱くすることを特徴とする溶射前処理方法。 Before forming the thermal spray coating on the inner surface of the cylinder bore, when forming a rough surface having irregularities for increasing the adhesion of the thermal spray coating ,
Forming a rough surface having irregularities adhesion is high due Ri said sprayed coating on roughened portions that form the thermal spray coating of said internal cylindrical surface,
The portion that does not need to form the sprayed coating has a straight portion that continues linearly on the crankcase side with respect to the inner surface of the cylinder bore,
The straight portion is formed on a rough surface having unevenness by roughening, which is smoother than the rough surface having the unevenness where the adhesion of the thermal spray coating of the portion forming the sprayed coating is high ,
The rough surface of the portion that does not need to form the thermal spray coating having the straight portion has a roughness to which a part of the thermal spray material scattered at the time of thermal spraying to the portion forming the thermal spray coating is attached.
Prior to thermal spraying , the adhesion of the thermal spray material on the rough surface portion formed on the portion where the thermal spray coating having the straight portion need not be formed is weaker than the adhesion of the thermal spray material on the portion forming the thermal spray coating. In the processing method,
The portion that does not need to form the sprayed coating has a projecting portion that extends in the radial direction toward the center side of the cylinder bore on the side opposite to the cylinder bore inner surface of the straight portion,
The overhang portion is formed on a rough surface having irregularities by roughening, which is smoother than the rough surface having irregularities with high adhesion of the thermal spray coating of the portion forming the thermal spray coating,
The rough surface of the portion that does not need to form the thermal spray coating having the overhanging portion is rough so that a part of the thermal spray material scattered during thermal spraying to the portion forming the thermal spray coating adheres.
The adhesion force of the thermal spray material on the rough surface portion formed on the portion where the thermal spray coating having the overhanging portion is not necessary is made weaker than the adhesion force of the thermal spray material on the portion forming the thermal spray coating. A thermal spraying pretreatment method characterized. 前記ストレート部を、ねじ切り加工により粗面化し、前記張り出し部を、フェーシング加工により粗面化することを特徴とする請求項３に記載の溶射前処理方法。The thermal spraying pretreatment method according to claim 3, wherein the straight portion is roughened by threading, and the overhanging portion is roughened by facing.
JP2012049200A 2012-03-06 2012-03-06 Cylinder block and pre-spraying method Active JP5962078B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2012049200A JP5962078B2 (en) 2012-03-06 2012-03-06 Cylinder block and pre-spraying method
PCT/JP2013/055094 WO2013133098A1 (en) 2012-03-06 2013-02-27 Spray preprocessing form and spray preprocessing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2012049200A JP5962078B2 (en) 2012-03-06 2012-03-06 Cylinder block and pre-spraying method

Publications (2)

Publication Number Publication Date
JP2013185169A JP2013185169A (en) 2013-09-19
JP5962078B2 true JP5962078B2 (en) 2016-08-03

Family

ID=49116580

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2012049200A Active JP5962078B2 (en) 2012-03-06 2012-03-06 Cylinder block and pre-spraying method

Country Status (2)

Country Link
JP (1) JP5962078B2 (en)
WO (1) WO2013133098A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016116815A1 (en) * 2016-09-08 2018-03-08 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Process for coating a cylinder of an internal combustion engine and cylinder for an internal combustion engine

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4710802B2 (en) * 2006-03-07 2011-06-29 日産自動車株式会社 Member with circular hole inner surface, processing method and processing device for circular hole inner surface
JP5087854B2 (en) * 2006-04-04 2012-12-05 日産自動車株式会社 Cylinder inner surface pre-spraying substrate processing method and cylinder inner surface pre-spraying pre-spraying shape
JP5499790B2 (en) * 2010-03-11 2014-05-21 日産自動車株式会社 Cylinder block processing method, cylinder block and cylinder block for thermal spraying

Also Published As

Publication number Publication date
JP2013185169A (en) 2013-09-19
WO2013133098A1 (en) 2013-09-12

Similar Documents

Publication Publication Date Title
US9382868B2 (en) Cylinder bore surface profile and process
US8877285B2 (en) Process for repairing a cylinder running surface by means of plasma spraying processes
CN105377486B (en) Method for machining a running surface of a cylinder of an internal combustion engine
CN104625558A (en) Rolling tool
JP5962078B2 (en) Cylinder block and pre-spraying method
JP6455870B2 (en) Workpiece with cutout for receiving piston
JP5880572B2 (en) Cylinder block manufacturing method
US10259146B2 (en) Producing method for cylinder block
GB2558414B (en) Method of honing high-porosity cylinder liners
JP2009197309A (en) Method for forming thermally sprayed film
JP5499790B2 (en) Cylinder block processing method, cylinder block and cylinder block for thermal spraying
JP6515155B2 (en) Method for coating a cylinder of an internal combustion engine, and a cylinder for an internal combustion engine
JP5789076B2 (en) Cylinder bore inner surface repair method and cylinder bore inner surface repair device
JP4984214B2 (en) Iron-based sprayed thin film for cylinder block and cylinder block
US10920308B2 (en) Coating cylinder bores without prior activation of the surface
JP4876636B2 (en) Thermal spray coating masking apparatus and thermal spray coating masking method
JP2017057825A (en) Cylinder bore surface treatment method
JP6443315B2 (en) Masking jig for thermal spraying and masking method in thermal spraying using the same
JP6485188B2 (en) Thermal spray cylinder block manufacturing method
JP2015229969A (en) Cylinder block manufacturing method
JP2015078393A (en) Corrosion prevention method of cast iron pipe
KR20080103723A (en) Outer Wall Coating Method of Cylinder Sleeve

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20150203

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20151201

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20160115

A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 20160209

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20160415

A911 Transfer to examiner for re-examination before appeal (zenchi)

Free format text: JAPANESE INTERMEDIATE CODE: A911

Effective date: 20160425

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20160531

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20160613

R151 Written notification of patent or utility model registration

Ref document number: 5962078

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R151