JP4883371B2

JP4883371B2 - Counter-piston disc brake caliper

Info

Publication number: JP4883371B2
Application number: JP2008128908A
Authority: JP
Inventors: 徹三西村; 薫杉田
Original assignee: Nippon Light Metal Co Ltd
Current assignee: Nippon Light Metal Co Ltd
Priority date: 2008-05-15
Filing date: 2008-05-15
Publication date: 2012-02-22
Anticipated expiration: 2028-05-15
Also published as: JP2009275856A

Description

この発明は、対向ピストン型ディスクブレーキ用キャリパに関するものである。 The present invention relates to a caliper for an opposed piston type disc brake.

従来の分割型キャリパとして、キャリパボディ（キャリパ本体）の作用部側分割体と反作用部側分割体とを電子ビーム溶接により接合する構造のものや、シリンダ孔を有するキャリパ半体を跨いで連結するブリッジ部とを一体に鋳造成形し、一方のキャリパ半体のシリンダ孔の底部を塞ぐ蓋体を電子ビーム溶接により接合する対向ピストン型の分割型キャリパが知られている（例えば、特許文献１参照）。 As a conventional split type caliper, the caliper body (caliper body) has a structure in which the action part side split body and the reaction part side split body are joined by electron beam welding, or a caliper half body having a cylinder hole is connected to straddle. An opposed piston type split caliper is known in which a bridge is integrally cast and a lid that closes the bottom of a cylinder hole of one caliper half is joined by electron beam welding (see, for example, Patent Document 1). ).

また、対向ピストン型ディスクブレーキ用キャリパにおいて、シリンダを底部の蓋部材と、該蓋部材で閉塞される開口部を有するシリンダ本体（キャリパ本体）とで構成し、蓋部材をシリンダ本体に摩擦攪拌溶接により接合する構造のものが知られている（例えば、特許文献２参照）。
特開平５−２１５１５７号公報（特許請求の範囲、段落［００１７］、図１，図３，図７）特開２００７−１０１３６号公報（特許請求の範囲、図３，図１０，図１２，図２３） Moreover, in the caliper for opposed piston type disc brake, the cylinder is composed of a bottom lid member and a cylinder body (caliper body) having an opening closed by the lid member, and the lid member is friction stir welded to the cylinder body. The structure of joining by this is known (for example, refer patent document 2).
JP-A-5-215157 (Claims, paragraph [0017], FIG. 1, FIG. 3, FIG. 7) JP 2007-10136 A (Claims, FIGS. 3, 10, 12, and 23)

しかしながら、特許文献１の技術は、電子ビーム溶接は溶融溶接のためにブローボールが生じ易く、溶接部位と溶接熱影響部の材料強度が大幅に低下し、ブレーキキャリパのように大きな繰り返し応力を受ける部品に用いるには強度不足と信頼性に欠けていた。 However, in the technique of Patent Document 1, blown balls are easily generated in electron beam welding because of fusion welding, and the material strength of the welded part and the weld heat affected zone is greatly reduced, and a large repetitive stress is applied like a brake caliper. Insufficient strength and reliability for use in parts.

また特許文献２ないし特許文献１の対向するシリンダ部を有するキャリパ本体を鋳造等によって作製し、シリンダ部と蓋部材とを電子ビームあるいは摩擦攪拌溶接によって接合する場合、このような構造の対向ピストン型ディスクブレーキ用キャリパを作製するには、複雑な金型が必要となり、多くの手間を要していた。特に、シリンダ部にの仕上げ加工に特殊な技術と工数が必要であり、作製に多くの時間及び労力を要していた。 Further, when the caliper body having the opposing cylinder part of Patent Documents 2 to 1 is manufactured by casting or the like, and the cylinder part and the lid member are joined by electron beam or friction stir welding, the opposed piston type having such a structure is used. In order to manufacture a caliper for a disc brake, a complicated mold is required, and much labor is required. In particular, special techniques and man-hours are required for finishing the cylinder part, and much time and labor are required for the production.

この発明は、上記事情に鑑みてなされたもので、複雑な金型を用いることなく容易に作製できる、対向ピストン型ディスクブレーキ用キャリパを提供することを課題とする。 This invention is made in view of the said situation, and makes it a subject to provide the caliper for opposing piston type disc brakes which can be produced easily, without using a complicated metal mold | die.

上記課題を解決するため、請求項１記載の発明は、対向するシリンダ部の一方を有する一対のキャリパ半体をディスクの収容空間を残してブリッジ部によって連結し、上記シリンダ部内に摺動可能に嵌挿されるピストンによりブレーキパッドを上記ディスクに押圧する対向ピストン型ディスクブレーキ用キャリパにおいて、上記キャリパ半体は、上記ブリッジ部を境にして分割成形され、上記キャリパ半体は、上記シリンダ部に連通する連通路を有すると共に、ブリッジ部における連通路の外側肉厚を連通路以外の部分の略半分の肉厚と同じにし、両キャリパ半体のブリッジ部同士を、上記連通路を回避すべく摩擦攪拌接合工具の回転ツールの攪拌深さを一定にして、上記ブリッジ部の両面側より摩擦攪拌接合を行って結合してなる、ことを特徴とする。 In order to solve the above-mentioned problem, the invention according to claim 1 is characterized in that a pair of caliper halves having one of the opposing cylinder portions are connected by a bridge portion leaving a disc accommodating space and slidable in the cylinder portion. In the opposed piston type disc brake caliper that presses the brake pad against the disc by the piston to be inserted, the caliper half is dividedly formed with the bridge portion as a boundary, and the caliper half communicates with the cylinder portion. The outer wall thickness of the communication passage in the bridge portion is the same as the thickness of almost half of the portion other than the communication passage, and the bridge portions of both caliper halves are frictioned to avoid the communication passage. The stirring depth of the rotating tool of the stir welding tool is made constant, and the friction stir welding is performed from both sides of the bridge portion to be combined. And butterflies.

このように構成することにより、一体に形成される対向ピストン型キャリパに比べて複雑な金型を用いずに鋳造によって作製されたシリンダ部を有するキャリパ半体のブリッジ部同士を摩擦攪拌接合によって結合してキャリパを作製することができる。この場合、ブリッジ部の両面側より摩擦攪拌接合を行って結合することにより、キャリパ半体同士の接合を強固にすることができる。 By configuring in this way, the bridge parts of caliper halves having a cylinder part produced by casting without using a complicated mold compared to the integrally formed opposed piston type caliper are joined by friction stir welding. Thus, a caliper can be manufactured. In this case, the caliper halves can be firmly joined together by performing friction stir welding from both sides of the bridge portion .

また、電子ビーム溶接にあっては溶融溶接のためにブローボールが生じ易く、溶接部位と溶接熱影響部の材料強度が大幅に低下し、ブレーキキャリパのように大きな繰り返し応力を受ける部品に用いるには強度不足と信頼性に欠けていた。これに対して、摩擦攪拌接合は固体での溶接であり、溶融に伴う凝固収縮、ガス発生がないので、未溶融に伴う接合不良や鋳巣、ブローホールの発生がない。また、摩擦攪拌接合は溶接時の温度が低く熱影響部の強度低下も微小であって、接合強度の高い欠陥の少ない信頼性の高い接合とすることができる。 Also, in electron beam welding, blow balls are likely to occur due to fusion welding, and the material strength of the welded part and weld heat affected zone is greatly reduced. Lacks strength and lacks reliability. On the other hand, the friction stir welding is a solid welding, and there is no solidification shrinkage or gas generation accompanying melting, so that there is no bonding failure, casting hole, or blow hole due to unmelting. In addition, the friction stir welding has a low temperature during welding and a slight decrease in the strength of the heat-affected zone, and can be a highly reliable joint with high bonding strength and few defects.

また、上記のように構成することにより、シリンダ部に連通する連通路を有するキャリパ半体同士を結合する場合において、両キャリパ半体の接合面に開口する連通路の空間を確保した状態で摩擦攪拌接合することができる。 In addition, when the caliper halves having communication paths communicating with the cylinder portion are coupled to each other by the above-described configuration, the friction is maintained in a state in which the space of the communication path opened at the joint surface of both caliper halves is secured. Stir welding is possible.

また、請求項４記載の発明は、請求項１ないし３のいずれかに記載の対向ピストン型ディスクブレーキ用キャリパにおいて、上記両キャリパ半体の接合面のうちの一方に位置決め用の凸部を設け、他方には上記凸部に嵌合可能な位置決め用の凹部を設けてなる、ことを特徴とする。 According to a fourth aspect of the present invention, in the opposed piston type disc brake caliper according to any one of the first to third aspects, a positioning projection is provided on one of the joint surfaces of the two caliper halves. The other is provided with a positioning recess that can be fitted to the projection.

このように構成することにより、接合する両キャリパ半体の接合面に設けられた位置決め用の凸部と凹部とを嵌合させた状態で両キャリパ半体同士を摩擦攪拌接合することができる。特に、連通路を有するキャリパ半体同士の接合する場合には、キャリパ半体の接合面に開口する連通路同士の位置決めを容易にすることができる。 By comprising in this way, both caliper halves can be friction-stir-joined in the state which fitted the convex part for positioning provided in the joining surface of the both caliper half bodies to join, and a recessed part. In particular, when the caliper halves having the communication path are joined to each other, the positioning of the communication paths opened on the joining surface of the caliper halves can be facilitated.

また、請求項５記載の発明は、請求項１ないし４のいずれかに記載の対向ピストン型ディスクブレーキ用キャリパにおいて、上記キャリパ半体のシリンダ部に連通する連通路は、キャリパ半体の鋳造時に鋳込まれるパイプ部材により形成されている、ことを特徴とする。 According to a fifth aspect of the present invention, in the opposed piston type disc brake caliper according to any one of the first to fourth aspects, the communication passage communicating with the cylinder portion of the caliper half is formed when the caliper half is cast. It is formed by the pipe member cast.

このように構成することにより、キャリパ半体の鋳造と同時に、シリンダ部に連通する連通路をパイプ部材によって形成することができる。 By comprising in this way, the communicating path connected to a cylinder part can be formed with a pipe member simultaneously with casting of a caliper half.

また、請求項６記載の発明は、請求項１ないし４のいずれかに記載の対向ピストン型ディスクブレーキ用キャリパにおいて、上記キャリパ半体のシリンダ部に連通する連通路は、キャリパ半体の鋳造時に鋳込まれ、鋳造後に除去可能な中子によって形成されている、ことを特徴とする。 According to a sixth aspect of the present invention, in the opposed piston type disc brake caliper according to any one of the first to fourth aspects, the communication passage communicating with the cylinder portion of the caliper half is formed when the caliper half is cast. It is formed by a core that is cast and removable after casting.

このように構成することにより、キャリパ半体の鋳造時に鋳込まれ、鋳造後に除去される中子によってシリンダ部に連通する連通路を形成することができる。 By comprising in this way, the communicating path which is cast at the time of casting of a caliper half, and communicates with a cylinder part by the core removed after casting can be formed.

また、請求項７記載の発明は、請求項１ないし４のいずれかに記載の対向ピストン型ディスクブレーキ用キャリパにおいて、上記キャリパ半体のシリンダ部に連通する連通路は、上記キャリパ半体の鋳造後において、上記摩擦攪拌接合による両キャリパ半体の結合前に形成されてなる、ことを特徴とする。 According to a seventh aspect of the present invention, in the opposed piston type disc brake caliper according to any one of the first to fourth aspects, the communication path communicating with the cylinder portion of the caliper half is formed by casting the caliper half. It is formed before the two caliper halves are joined by the friction stir welding.

このようにキャリパを半体にて鋳造後に連通路の加工がなされる構成とすることにより、安定した形状の連通路を形成することが可能になる。またこの場合、ドリル加工を接合面側より行えばドリル孔を後から塞ぐ手数が省ける。
また、請求項８記載の発明は、請求項１ないし４のいずれかに記載の対向ピストン型ディスクブレーキ用キャリパにおいて、上記キャリパ半体の２個のシリンダ部を連通する第１の連通路は、上記キャリパ半体の鋳造時に鋳込まれ、鋳造後に除去可能な中子によって形成され、上記両シリンダ部に連通する第２の連通路は、鋳抜きピンを用いて形成されている、ことを特徴とする。
また、請求項９記載の発明は、請求項１ないし４のいずれかに記載の対向ピストン型ディスクブレーキ用キャリパにおいて、上記キャリパ半体の２個のシリンダ部を連通する第１の連通路は、両シリンダ部の開口側から設けられる連通路によって形成され、上記シリンダ部に連通する第２の連通路は、上記キャリパ半体の両接合面より設けられる連通路によって形成されている、ことを特徴とする。 Thus, it becomes possible to form the communication path of the stable shape by setting it as the structure by which a communication path is processed after casting a caliper in a half body. In this case, if drilling is performed from the joining surface side, the number of steps for closing the drill hole later can be saved.
According to an eighth aspect of the present invention, in the opposed piston type disc brake caliper according to any one of the first to fourth aspects, the first communication path communicating the two cylinder portions of the caliper half is The second communication passage formed by a core that is cast at the time of casting the caliper half and is removable after casting is formed by using a core pin. And
Further, the invention according to claim 9 is the opposed piston type disc brake caliper according to any one of claims 1 to 4, wherein the first communication path that communicates the two cylinder portions of the caliper half is: It is formed by a communication path provided from the opening side of both cylinder parts, and the second communication path communicating with the cylinder part is formed by a communication path provided from both joint surfaces of the caliper halves. And

この発明によれば、上記のように構成されているので、以下のような優れた効果が得られる。 According to this invention, since it is configured as described above, the following excellent effects can be obtained.

（１）請求項１，２，３記載の発明によれば、鋳造によって作製されたシリンダ部を有するキャリパ半体のブリッジ部同士を摩擦攪拌接合によって結合してキャリパを作製することができるので、複雑な金型を用いずに作製されたキャリパ半体同士を摩擦攪拌接合によって結合して容易にキャリパを作製することができ、生産性の向上が図れる。また、半体同士を接合するので半体の状態にて所要部の仕上げ加工ができるので仕上げ加工が容易であり生産性も向上する。この場合、ブリッジ部の両面側より摩擦攪拌接合を行って結合することにより、接合の際にブローホールなどの溶接欠陥が発生せずにキャリパ半体同士の接合を強固にすることができるので、製品精度の向上が図れる。 (1) According to the inventions described in claims 1, 2 and 3, since the caliper halves having a cylinder portion produced by casting can be joined together by friction stir welding, a caliper can be produced. Caliper halves produced without using complicated molds can be joined together by friction stir welding to easily produce calipers, and productivity can be improved. Further, since the halves are joined to each other, the required portion can be finished in the state of the halves, so that finishing is easy and productivity is improved. In this case, by joining by performing friction stir welding from both sides of the bridge portion, it is possible to strengthen the joining between the caliper halves without causing welding defects such as blow holes during joining, Product accuracy can be improved .

（２）請求項１，２，３記載の発明によれば、両キャリパ半体の接合面に開口する連通路の空間を確保した状態で摩擦攪拌接合することができるので、上記（１）に加えて、更にシリンダ部に連通する連通路を有するキャリパを容易に作製することができる。 (2) According to the invention of claim 1, 2, 3, wherein, it is possible to friction stir welding while securing the space of the communication passage opening into the junction plane of the two caliper halves, the above (1) In addition, it is possible to easily produce a caliper having a communication path communicating with the cylinder portion.

（３）請求項４記載の発明によれば、接合する両キャリパ半体の接合面に設けられた位置決め用の凸部と凹部とを嵌合させた状態で両キャリパ半体同士を摩擦攪拌接合することができるので、上記（１），（２）に加えて、更にキャリパ半体同士の接合を容易かつ確実にすることができる。特に、連通路を有するキャリパ半体同士の接合する場合には、キャリパ半体の接合面に開口する連通路同士の位置決めを容易にすることができるので、両キャリパ半体の連通路の接続を正確にすることができ、製品精度の向上が図れる。 (3) According to the invention described in claim 4 , the two caliper halves are friction stir welded in a state in which the positioning convex portions and the concave portions provided on the joint surfaces of the two caliper halves to be joined are fitted. Therefore, in addition to the above (1) and (2), the caliper halves can be easily and reliably joined. In particular, when caliper halves having communication paths are joined to each other, it is possible to facilitate positioning of the communication paths that open to the joining surface of the caliper halves, so that the communication paths of both caliper halves can be connected. It can be made accurate and the product accuracy can be improved.

（４）請求項５記載の発明によれば、キャリパ半体の鋳造と同時に、シリンダ部に連通する連通路をパイプ部材によって形成することができるので、上記（１）〜（３）に加えて、更にシリンダ部内に摺動可能に嵌挿されるピストンの作動油の油路を構成する連通路を確実に形成することができる。 (4) According to the invention described in claim 5, since the communication passage communicating with the cylinder portion can be formed by the pipe member simultaneously with the casting of the caliper half, in addition to the above (1) to (3) Furthermore, the communication path that constitutes the oil path of the hydraulic oil of the piston that is slidably fitted into the cylinder portion can be reliably formed.

（５）請求項６記載の発明によれば、キャリパ半体の鋳造時に鋳込まれ、鋳造後に除去される中子によってシリンダ部に連通する連通路を形成することができるので、上記（１）〜（３）に加えて、更にシリンダ部内に摺動可能に嵌挿されるピストンの作動油の油路を構成する連通路を容易に形成することができる。 (5) According to the invention described in claim 6 , since the core that is cast at the time of casting the caliper half and is removed after casting can form a communication path that communicates with the cylinder portion, the above (1) In addition to (3), it is possible to easily form a communication passage that constitutes an oil passage for hydraulic oil of a piston that is slidably inserted into the cylinder portion.

（６）請求項７記載の発明によれば、キャリパ半体同士を鋳造後に連通路を形成するために、鋳造工数が削減し確実な形状の連通路が得られ、またこの場合、ドリル加工を接合面側より行えばドリル孔を後から塞ぐ手数が省ける。
( 6 ) According to the invention described in claim 7 , since the communication path is formed after casting the caliper halves together, the number of casting steps is reduced, and a reliable communication path can be obtained. If it is performed from the joint surface side, the trouble of closing the drill hole later can be saved.

以下に、この発明の最良の実施形態について、添付図面に基づいて詳細に説明する。 DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the best embodiment of the present invention will be described in detail with reference to the accompanying drawings.

＜第１実施形態＞
図１は、この発明の第１実施形態に係る対向ピストン型ディスクブレーキ用キャリパ（以下に、単にキャリパという）の平面図（ａ）及び該キャリパの摩擦攪拌接合部を示す断面図である。 <First Embodiment>
FIG. 1 is a plan view (a) of a caliper for opposing piston type disc brake (hereinafter simply referred to as caliper) according to a first embodiment of the present invention, and a cross-sectional view showing a friction stir welding portion of the caliper.

この発明に係るキャリパ１０は、対向するシリンダ部２０の一方を有する一対のキャリパ半体すなわち車両の外側に位置するアウター側キャリパ半体１１及び車両の内側に位置するインナー側キャリパ半体１２をディスク１の収容空間２を残してブリッジ部１３によって連結し、シリンダ部２０内に摺動可能に嵌挿されるピストン（図示せず）によりブレーキパッド（図示せず）をディスク１に押圧する対向ピストン型であって、キャリパ半体１１，１２は、ブリッジ部１３を境にして分割成形され、両キャリパ半体１１，１２のブリッジ部１３同士を摩擦攪拌接合により結合してなる。なお、キャリパ半体１１，１２は、それぞれアルミニウム合金製の鋳物にて形成されている。 The caliper 10 according to the present invention includes a pair of caliper halves having one of the opposing cylinder portions 20, that is, an outer caliper half 11 located outside the vehicle and an inner caliper half 12 located inside the vehicle. 1 is a counter-piston type that is connected by a bridge portion 13 while leaving a receiving space 2 and presses a brake pad (not shown) against the disc 1 by a piston (not shown) that is slidably inserted into the cylinder portion 20. The caliper halves 11 and 12 are divided and formed with the bridge portion 13 as a boundary, and the bridge portions 13 of the caliper halves 11 and 12 are joined to each other by friction stir welding. The caliper halves 11 and 12 are each formed of an aluminum alloy casting.

また、キャリパ１０は、シリンダ部２０に連通する連通路３０を有しており、この連通路３０内に供給される作動油によって作動するピストンによりブレーキパッドをディスク１に押圧するように構成されている。なお、第１実施形態のキャリパ１０は、連通路３０がアルミニウム合金製のパイプ部材４０によって形成されている。 Further, the caliper 10 has a communication passage 30 that communicates with the cylinder portion 20, and is configured to press the brake pad against the disc 1 by a piston that is operated by hydraulic oil supplied into the communication passage 30. Yes. In the caliper 10 of the first embodiment, the communication passage 30 is formed by a pipe member 40 made of aluminum alloy.

上記キャリパ半体１１，１２は、２個の並設されるシリンダ部２０を有する基部１４と、この基部１４の両端部から略平行に突出するブリッジ部１３を有すると共に、両シリンダ部２０を連通する連結路３０ａ及び、一端がそれぞれ両シリンダ部２０に連通し、他端がブリッジ部１３の先端の接合面１３ａに開口する連通路３０ｂを有する点で共通しており、アウター側キャリパ半体１１に対してインナー側キャリパ半体１２が、一方のシリンダ部２０に連通する作動油の供給口１５と、連結路３０ａ及び連通路３０ｂ中の空気を抜くための空気抜き孔１６を設ける点で相違している。したがって、両キャリパ半体１１，１２は、基本的には略同一の形状を有しており、上記供給口１５と空気抜き孔１６以外では同様の形状の金型を用いて鋳造される。 The caliper halves 11 and 12 include a base portion 14 having two cylinder portions 20 arranged side by side, a bridge portion 13 projecting substantially in parallel from both end portions of the base portion 14, and the cylinder portions 20 communicate with each other. The connecting path 30a and the one end communicate with both cylinder portions 20, and the other end has a common passage 30b that opens to the joint surface 13a at the tip of the bridge portion 13, and the outer caliper half 11 is common. On the other hand, the inner caliper half 12 is different in that a hydraulic oil supply port 15 communicating with one of the cylinder parts 20 and an air vent hole 16 for venting air in the connecting passage 30a and the connecting passage 30b are provided. ing. Accordingly, the caliper halves 11 and 12 basically have substantially the same shape, and are cast using a mold having the same shape except for the supply port 15 and the air vent hole 16.

また、素材１１Ａ，１２Ａの接合面１３ａの両側端部には、接合面１３ａと連続した接合面を有し、摩擦攪拌接合の始点及び終点部に位置するタブ１３ｃが形成されている。このタブ１３ｃは摩擦攪拌接合後に除去される。 In addition, tabs 13c that have joint surfaces that are continuous with the joint surface 13a and that are located at the start and end points of friction stir welding are formed at both ends of the joint surfaces 13a of the materials 11A and 12A. The tab 13c is removed after the friction stir welding.

また、キャリパ半体１１，１２のうちの一方例えばインナー側キャリパ半体１２の接合面１３ａには、位置決め用の凸部１７が設けられ、他方例えばアウター側キャリパ半体１１の接合面１３ａには、凸部１７に嵌合可能な位置決め用の凹部１８が設けられている。なお、凸部１７をアウター側キャリパ半体１１の接合面に設け、凹部１８をインナー側キャリパ半体１２の接合面１３ａに設けてもよい。また、この凸部１７と凹部１８は、接合面１３ａの任意の位置に１個あるいは複数個設けてもよい。また、凸部１７と凹部１８をタブ１３ｃの接合面に設けてもよい。 Further, one of the caliper halves 11, 12, for example, the joint surface 13 a of the inner caliper half 12 is provided with a positioning projection 17, and the other, for example, the joint surface 13 a of the outer caliper half 11, A positioning concave portion 18 that can be fitted to the convex portion 17 is provided. The convex portion 17 may be provided on the joint surface of the outer caliper half 11 and the concave portion 18 may be provided on the joint surface 13 a of the inner caliper half 12. Further, one or a plurality of the convex portions 17 and the concave portions 18 may be provided at an arbitrary position on the joint surface 13a. Moreover, you may provide the convex part 17 and the recessed part 18 in the joint surface of the tab 13c.

このように両キャリパ半体１１，１２の接合面に互いに嵌合可能な位置決め用の凸部１７と凹部１８を設けることにより、両キャリパ半体１１，１２同士を接合する際に、凸部１７と凹部１８を嵌合した状態で接合することができる。したがって、両キャリパ半体１１，１２を正確に位置決することができ、さらに両キャリパ半体１１，１２に設けられた連通路３０（具体的には連通路３０ｂの開口）を正確に接続することができる。 In this way, by providing the positioning projections 17 and the recesses 18 that can be fitted to each other on the joint surfaces of the caliper halves 11 and 12, the projections 17 are joined when the caliper halves 11 and 12 are joined together. And the recess 18 can be joined together. Therefore, both the caliper halves 11 and 12 can be accurately positioned, and the communication passage 30 (specifically, the opening of the communication passage 30b) provided in both the caliper halves 11 and 12 can be accurately connected. Can do.

次に、キャリパ１０を作製する手順について、図２ないし図７を参照して説明する。まず、キャリパ半体１１，１２を鋳造により作製する。この場合、図７に示すように、下金型５０に連通路３０を形成するアルミニウム合金製のパイプ部材４０をセットした後、下金型５０に上金型５１を閉じ、上下金型５０，５１を図示しない治具によって固定する。そして、上下金型５０，５１を水平状態より徐々に傾動させつつ図示しない湯溜まりに溜められた溶湯を湯口５２を介してキャビティ５５内に注湯する。９０度傾けて、上金型５１に設けられた湯口５２を上方に位置させた状態で押湯をきかせた状態で所定の時間保持して凝固する。その後、上下金型５０，５１を９０度傾けて元の水平姿勢に戻す。次いで、上金型５１を開き、下金型５０に設けられた貫通孔５３にそれぞれ摺動可能に嵌挿された複数（図面では５本の場合を示す）の製品押出ピン５４を図示しない昇降機構例えばシリンダ装置によって下金型５０の上方側に押し上げてキャリパ半体例えばアウター側キャリパ半体１１の素材１１Ａを取り出す。下金型５０から取り出された素材１１Ａは、冷却された状態で湯口が切断され、その後、熱処理が施され、必要によりショットブラストによる表面処理が施される。 Next, a procedure for manufacturing the caliper 10 will be described with reference to FIGS. First, the caliper halves 11 and 12 are produced by casting. In this case, as shown in FIG. 7, after setting the aluminum alloy pipe member 40 forming the communication path 30 in the lower mold 50, the upper mold 51 is closed in the lower mold 50, and the upper and lower molds 50, 50, 51 is fixed with a jig (not shown). Then, the upper and lower molds 50 and 51 are gradually tilted from the horizontal state, and the molten metal stored in a hot water pool (not shown) is poured into the cavity 55 through the gate 52. It is tilted by 90 degrees and solidified by holding it for a predetermined time in a state where the pouring hot water is applied while the pouring gate 52 provided on the upper mold 51 is positioned upward. Thereafter, the upper and lower molds 50 and 51 are inclined 90 degrees to return to the original horizontal posture. Next, the upper die 51 is opened, and a plurality of product extruding pins 54 (five cases are shown in the drawing) that are slidably inserted into the through holes 53 provided in the lower die 50 are raised and lowered (not shown). A mechanism, for example, a cylinder device, is pushed up above the lower mold 50 to take out the material 11A of the caliper half, for example, the outer caliper half 11. The raw material 11A taken out from the lower mold 50 is cut in the cooled state, then subjected to heat treatment and, if necessary, surface treatment by shot blasting.

なお、第１実施形態にあっては中子の使用は必要なくシリンダ形成部も下型に形成しておくことが可能である。 In the first embodiment, it is not necessary to use a core, and the cylinder forming portion can be formed in the lower mold.

上記のようにして、図３に示すアウター側キャリパ半体１１の素材１１Ａと、図４に示すインナー側キャリパ半体１２の素材１２Ａを作製する。これら素材１１Ａ，１２Ａの状態では、パイプ部材４０が接合面１３ａから突出した状態となっている。 As described above, the material 11A of the outer caliper half 11 shown in FIG. 3 and the material 12A of the inner caliper half 12 shown in FIG. 4 are produced. In the state of these materials 11A and 12A, the pipe member 40 protrudes from the joint surface 13a.

上記のようにして作製されたキャリパ半体１１，１２の素材１１Ａ，１２Ａは、次に以下のようにして機械加工が施される。すなわち、接合面１３ａから突出しているパイプ部材４０と、シリンダ部２０内に露出しているパイプ部材４０は切断され、シリンダ部２０の内周面の必要な加工と接合面１３ａの表面が仕上げ加工される。また、アウター側キャリパ半体１１の接合面１３ａ又はタブ１３ｃの接合面には凹部１８を形成するピン穴１８ａが穿設される（図５（ｃ）参照）。これに対して、インナー側キャリパ半体１２の接合面１３ａ又はタブ１３ｃの接合面には、凸部１７を形成する位置決めピン１７ａの嵌合穴１７ｂが穿設され、この嵌合穴１７ｂに位置決めピン１７ａの基端側を嵌挿して、位置決めピン１７ａを突設する（図６（ｃ）参照）。また、インナー側キャリパ半体１２の接合面１３ａにおけるパイプ部材４０（連通路３０）の開口部には、パイプ部材４０（連通路３０）の開口を含む略楕円形状の凹所１９が設けられる。そして、インナー側キャリパ半体１２の表面側から凹所１９に貫通する空気抜き孔１６が設けられ、この空気抜き孔１６の表面側の大径孔部１６ａには空気抜きプラグ（図示せず）の取付用雌ねじ１６ｂが刻設される。この場合、凹所１９は左右両側に設けられているが、空気抜き孔１６を貫通する部分の一方のみ設け、他方には設けなくてもよい。また、インナー側キャリパ半体１２の表面側から並設されたシリンダ部２０の一方に連通する作動油の供給口１５が設けられ、この供給口１５の開口側に雌ねじ１５ａが刻設される。 The materials 11A and 12A of the caliper halves 11 and 12 produced as described above are then machined as follows. That is, the pipe member 40 protruding from the joint surface 13a and the pipe member 40 exposed in the cylinder portion 20 are cut, and the necessary processing of the inner peripheral surface of the cylinder portion 20 and the surface of the joint surface 13a are finished. Is done. Further, a pin hole 18a that forms a recess 18 is formed in the joint surface 13a of the outer caliper half 11 or the joint surface of the tab 13c (see FIG. 5C). On the other hand, the fitting surface 17a of the inner caliper half 12 or the joining surface of the tab 13c is provided with a fitting hole 17b of a positioning pin 17a that forms the convex portion 17, and positioning is performed in the fitting hole 17b. The proximal end side of the pin 17a is inserted and the positioning pin 17a is protruded (refer FIG.6 (c)). In addition, a substantially elliptical recess 19 including the opening of the pipe member 40 (communication path 30) is provided in the opening of the pipe member 40 (communication path 30) in the joint surface 13a of the inner caliper half 12. An air vent hole 16 penetrating from the surface side of the inner caliper half 12 to the recess 19 is provided, and an air vent plug (not shown) is attached to the large-diameter hole portion 16a on the surface side of the air vent hole 16. An internal thread 16b is engraved. In this case, the recess 19 is provided on both the left and right sides, but only one of the portions penetrating the air vent hole 16 may be provided and not provided on the other. Further, a hydraulic oil supply port 15 communicating with one of the cylinder portions 20 arranged in parallel from the surface side of the inner caliper half 12 is provided, and a female screw 15 a is engraved on the opening side of the supply port 15.

上記のようにして作製されたキャリパ半体１１，１２は、ブリッジ部１３の先端の接合面１３ａに設けられた位置決め用の凸部１７（位置決めピン１７ａ）と、位置決め用凹部１８（ピン穴１８ａ）とを嵌合した状態で、図示しない治具によって固定される。 The caliper halves 11, 12 produced as described above have positioning protrusions 17 (positioning pins 17 a) and positioning recesses 18 (pin holes 18 a) provided on the joint surface 13 a at the tip of the bridge portion 13. ) And are fixed by a jig (not shown).

そして、両キャリパ半体１１，１２の接合部を摩擦攪拌接合によって結合する。摩擦攪拌接合を行う場合は、図２（ｃ），（ｄ）に示すように、ショルダー部３ｂに対して摩擦ピン３ａの突出長さが調節可能な摩擦攪拌接合工具３を用意し、そして、図２（ａ）に示すように、まず、接合部の一方の側例えば表面側の端部の形成したタブ１３ｃに、摩擦攪拌接合工具３の摩擦ピン３ａの先端を接合部の中央部まで押し込んでショルダー部３ｂが表面に接するように、表面に沿って移動することによって接合部の表面側を摩擦攪拌接合する。つまり、摩擦攪拌接合工具３の摩擦ピン３ａの回転による摩擦熱と、キャリパ半体１１，１２と摩擦攪拌接合工具３のショルダー部３ｂとの摺動により発生する摩擦熱とによって、キャリパ半体１１，１２の接合部の近傍部分においてキャリパ半体１１，１２を形成するアルミニウム合金が軟化すると共に、回転ツール３の回転力によって攪拌混合され、その後摩擦攪拌接合工具３の通過に際して接合部の材料が塑性流動し攪拌した後、冷却固化することによって、キャリパ半体１１，１２の接合部の表面側を摩擦攪拌接合する。この際、連通路３０又は連通路３０と凹所１９がある部分を摩擦攪拌接合するときは、図２（ｄ）に示すように、連通路３０又は連通路３０と凹所１９を回避すべく連通路３０部の摩擦攪拌接合を摩擦攪拌接合工具３の摩擦ピン３ａをショルダー部３ｂより引っ込めて摩擦ピン３ａの長さを短くして攪拌深さを中空部すなわち連通路３０又は連通路３０と凹所１９がある部分の外側形状に追随させて変位して、ブリッジ部１３同士を結合する。この摩擦攪拌接合の終点は他端側の端部に形成したタブ１３ｃ内にて終え、摩擦攪拌接合工具３を引き上げる。この際、摩擦ピン３ａの抜き痕がタブ１３ｃに残る。 And the junction part of both the caliper halves 11 and 12 is couple | bonded by friction stir welding. When performing friction stir welding, as shown in FIGS. 2 (c) and 2 (d), a friction stir welding tool 3 capable of adjusting the protruding length of the friction pin 3a with respect to the shoulder portion 3b is prepared, and As shown in FIG. 2 (a), first, the tip of the friction pin 3a of the friction stir welding tool 3 is pushed into the center of the joint into the tab 13c formed on one side of the joint, for example, the end on the surface side. Thus, the surface side of the joint is friction stir welded by moving along the surface so that the shoulder 3b is in contact with the surface. That is, the caliper half 11 is caused by the frictional heat generated by the rotation of the friction pin 3 a of the friction stir welding tool 3 and the frictional heat generated by sliding between the caliper halves 11 and 12 and the shoulder portion 3 b of the friction stir welding tool 3. , 12 in the vicinity of the joint portion, the aluminum alloy forming the caliper halves 11, 12 is softened and agitated and mixed by the rotational force of the rotary tool 3, and then the material of the joint portion passes through the friction stir welding tool 3. After the plastic flow and stirring, the surface side of the joint portion of the caliper halves 11 and 12 is friction stir welded by cooling and solidifying. At this time, when the friction stir welding is performed on the communication path 30 or a portion where the communication path 30 and the recess 19 are present, as shown in FIG. 2D, the communication path 30 or the communication path 30 and the recess 19 should be avoided. Friction pin 3a of friction stir welding tool 3 is retracted from shoulder portion 3b to shorten the length of friction pin 3a, and the stirring depth is reduced to a hollow portion, that is, communication passage 30 or communication passage 30. The bridge portion 13 is joined by being displaced by following the outer shape of the portion having the recess 19. The end point of this friction stir welding ends within the tab 13c formed at the end on the other end side, and the friction stir welding tool 3 is pulled up. At this time, the trace of the friction pin 3a remains on the tab 13c.

上記のようにして接合部の表面側の半分を摩擦攪拌接合した後、接合部の内面側の半分を、上記と同様に、高速回転する回転ツール３を接合部の中央部まで押し込んで、内面に沿って移動することによって接合部の内面側を摩擦攪拌接合する（図２（ｂ）参照）。 After the friction stir welding of the half of the surface side of the joint as described above, the inner half of the joint is pushed to the center of the joint by rotating the rotary tool 3 that rotates at a high speed in the same manner as described above. The friction stir welding is performed on the inner surface side of the joint portion (see FIG. 2B).

上記のようにして接合部の両面を摩擦攪拌接合する。この後、上記タブ１３ｃは切除する。これにより、両キャリパ半体１１，１２の結合を容易かつ強固にすることができる。 As described above, friction stir welding is performed on both surfaces of the joint portion. Thereafter, the tab 13c is cut off. Thereby, the coupling | bonding of both the caliper halves 11 and 12 can be made easy and firm.

また、上記のように構成される第１実施形態のキャリパによれば、連通路３０をパイプ部材４０によって形成するので、作動油の油路を確実に連続させることができ、製品の加工工数の低減を図ることができる。 Further, according to the caliper of the first embodiment configured as described above, the communication passage 30 is formed by the pipe member 40, so that the oil passage for the hydraulic oil can be reliably continued, and the number of processing steps of the product can be reduced. Reduction can be achieved.

なお、上記実施形態では、連通路３０又は連通路３０と凹所１９を回避すべく連通路３０部の摩擦攪拌接合を摩擦攪拌接合工具３の摩擦ピン３ａの長さを接合過程で変化させることにより、摩擦攪拌接合の深さを中空部（連通路３０又は連通路３０と凹所１９がある部分）の外側形状に追随させて変位して、ブリッジ部１３同士を結合する場合について説明したが、図８（ａ），（ｂ）に示すように、両キャリパ半体１１，１２のブリッジ部１３における連通路３０例えばパイプ部材４０を有する部分６０の外側肉厚をその他の部分すなわちパイプ部材４０以外の部分の外側略半分の肉厚と同じ厚さにし、両キャリパ半体１１，１２のブリッジ部１３同士を、摩擦攪拌接合工具の回転ツール３の攪拌深さを一定にすることで、連通路３０又は連通路３０と凹所１９を回避するようにして摩擦攪拌接合により結合してもよい。 In the above embodiment, the length of the friction pin 3a of the friction stir welding tool 3 is changed in the joining process in order to avoid the communication passage 30 or the communication passage 30 and the recess 19 in the friction stir welding of the communication passage 30 portion. According to the above description, the depth of the friction stir welding is displaced by following the outer shape of the hollow portion (the communication passage 30 or the portion where the communication passage 30 and the recess 19 are present) to connect the bridge portions 13 to each other. As shown in FIGS. 8A and 8B, the outer wall thickness of the portion 60 having the communication passage 30 such as the pipe member 40 in the bridge portion 13 of the caliper halves 11 and 12 is changed to the other portion, that is, the pipe member 40. The thickness of the outer caliper halves 11 and 12 is made equal to the thickness of the outer half of the other parts, and the stirring depth of the rotary tool 3 of the friction stir welding tool is made constant. Passage 30 or It may be bonded by friction stir welding so as to avoid passage 30 and the recess 19.

なお、この場合、図８（ｃ）に示すように、連通路３０（パイプ部材４０）を有する部分６０Ａの凹所１９Ａを外周側にのみ膨隆する略半楕円形状に形成し、接合面１３ａ内周側面を連続する円弧状に形成する方が望ましい。その理由は、ディスク１の外周面との隙間を均一にできるために、材料の削減が図れるからである。 In this case, as shown in FIG. 8 (c), the recess 19A of the portion 60A having the communication passage 30 (pipe member 40) is formed in a substantially semi-elliptical shape that bulges only on the outer peripheral side, and the inside of the joint surface 13a. It is desirable to form the peripheral side surface in a continuous arc shape. The reason is that the material can be reduced because the gap with the outer peripheral surface of the disk 1 can be made uniform.

＜第２実施形態＞
図９は、この発明の第２実施形態に係るキャリパを示す平面図、図１０は、第２実施形態に係るキャリパを構成するキャリパ半体を示す図で、（ａ）は平面図、（ｂ）は正面図、（ｃ）は側面図である。 Second Embodiment
FIG. 9 is a plan view showing a caliper according to a second embodiment of the present invention, FIG. 10 is a view showing a caliper half constituting the caliper according to the second embodiment, (a) is a plan view, (b) ) Is a front view, and (c) is a side view.

第２実施形態に係るキャリパ１０Ａは、上記パイプ部材４０に代えて、シリンダ部２０と連通路３０を、樹脂コーティングされた砂粒子を固化してなるシェル中子７０によって形成した場合である。すなわち、キャリパ半体例えばアウター側キャリパ半体１１を鋳造により作製する際、下金型（図示せず）にシェル中子７０をセットして上下金型を固定した後、第１実施形態と同様の工程を行ってキャリパ半体１１を鋳造した後、シェル中子７０を除去し、その後、第１実施形態と同様に、冷却→湯口切断→熱処理→機械加工を行ってキャリパ半体１１を作製する場合である。 In the caliper 10A according to the second embodiment, instead of the pipe member 40, the cylinder part 20 and the communication path 30 are formed by a shell core 70 formed by solidifying resin-coated sand particles. That is, when the caliper half, for example, the outer caliper half 11 is manufactured by casting, the shell core 70 is set in a lower mold (not shown) and the upper and lower molds are fixed, and then the same as in the first embodiment. After the caliper half body 11 is cast by performing the above process, the shell core 70 is removed, and then the caliper half body 11 is produced by performing cooling → cutting of the sprue → heat treatment → machining as in the first embodiment. This is the case.

この場合、シェル中子７０は、図１１に示すように、並列する２個の略円柱状のシリンダ形成部７１と、両シリンダ形成部７１を連結する連結路形成部７２と、両シリンダ形成部７１にそれぞれ一端が連結され、他端が接合面１３ａ側に位置する折曲部７３を有する一対の連通路形成部７４とで構成されている。 In this case, as shown in FIG. 11, the shell core 70 includes two substantially cylindrical cylinder forming portions 71 arranged in parallel, a connecting path forming portion 72 that connects both the cylinder forming portions 71, and both the cylinder forming portions. One end is connected to 71, and the other end is composed of a pair of communication path forming portions 74 having a bent portion 73 located on the joint surface 13a side.

上記説明では、アウター側キャリパ半体１１の作製について説明したが、インナー側キャリパ半体１２についても、アウター側キャリパ半体１１を作製する工程と同様の工程で作製することができる。 In the above description, the production of the outer caliper half 11 has been described. However, the inner caliper half 12 can also be produced in the same process as the process of producing the outer caliper half 11.

また、上記のようにして作製された両キャリパ半体１１，１２のブリッジ部１３同士を、第１実施形態と同様に、摩擦攪拌接合によって結合してキャリパ１０Ａを作製する。この場合、第１実施形態と同様に、両キャリパ半体１１，１２の接合面に互いに嵌合可能な位置決め用の凸部１７と凹部１８を設けることにより、両キャリパ半体１１，１２に設けられた連通路３０（具体的には連通路３０ｂの開口）を正確に接続することができる。 Further, the caliper 10A is manufactured by joining the bridge portions 13 of the caliper halves 11 and 12 manufactured as described above to each other by friction stir welding similarly to the first embodiment. In this case, similarly to the first embodiment, the caliper halves 11 and 12 are provided with the positioning projections 17 and the recesses 18 that can be fitted to each other on the joint surfaces of the caliper halves 11 and 12. The connected communication path 30 (specifically, the opening of the communication path 30b) can be accurately connected.

上記のように構成される第２実施形態のキャリパによれば、鋳造後に除去可能なシェル中子７０によって連通路３０を形成することができるので、第１実施形態に比べてパイプ部材４０の鋳包みに関連する工程は不要となる。 According to the caliper of the second embodiment configured as described above, the communication passage 30 can be formed by the shell core 70 that can be removed after casting, so that the casting of the pipe member 40 can be performed as compared with the first embodiment. The process related to wrapping is not necessary.

なお、第２実施形態において、その他の部分は第１実施形態と同じであるので、同一部分には同一符号を付して説明は省略する。 In the second embodiment, the other parts are the same as those in the first embodiment, so the same parts are denoted by the same reference numerals and description thereof is omitted.

＜第３実施形態＞
図１２は、この発明の第３実施形態に係るキャリパの摩擦攪拌接合後の状態を示す平面図、図１３は、第３実施形態におけるキャリパ半体を示す図で、（ａ）は平面図、（ｂ）は正面図、（ｃ）は側面図である。また、図１４は、第３実施形態に係るキャリパの一部を断面で示す平面図である。 <Third Embodiment>
FIG. 12 is a plan view showing a state after the friction stir welding of the caliper according to the third embodiment of the present invention, FIG. 13 is a view showing a caliper half in the third embodiment, (a) is a plan view, (B) is a front view, (c) is a side view. FIG. 14 is a plan view showing a part of the caliper according to the third embodiment in cross section.

第３実施形態は、キャリパ半体１１，１２同士を摩擦攪拌接合によって結合した後に、接合部の連通路３０を機械加工によって形成した場合である。すなわち、第３実施形態は、キャリパ半体１１，１２を鋳造する際に、後述するシェル中子７０Ａを用いて並列する２個のシリンダ部２０と、両シリンダ部２０を連結する連結路３０ａと、それぞれシリンダ部２０に連通する第１の連通路３１を形成し、鋳造後にシェル中子７０Ａを除去して、キャリパ半体１１，１２同士を摩擦攪拌接合した後に、接合部の連通路すなわち第１の連通路３１に連通する第２の連通路３２を形成した場合である。 In the third embodiment, the caliper halves 11 and 12 are joined to each other by friction stir welding, and then the communication path 30 of the joint is formed by machining. That is, in the third embodiment, when the caliper halves 11 and 12 are cast, two cylinder parts 20 arranged in parallel using a shell core 70A described later, and a connecting path 30a for connecting both the cylinder parts 20 are provided. The first communication passage 31 communicating with the cylinder portion 20 is formed, the shell core 70A is removed after casting, and the caliper halves 11 and 12 are friction stir welded together. This is a case where a second communication path 32 communicating with one communication path 31 is formed.

この場合、シェル中子７０Ａは、図１３及び図１５に示すように、並列する２個の略円柱状のシリンダ形成部７１と、両シリンダ形成部７１を連結する連結路形成部７２と、両シリンダ形成部７１にそれぞれ一端が連結され、他端がブリッジ部１３の中間部に位置する折曲部７３を有する一対の第１の連通路形成部７５とで構成されている。このように形成されたシェル中子７０Ａを下金型（図示せず）にセットして、上記第１，２実施形態と同様の工程でキャリパ半体例えばアウター側キャリパ半体１１の素材１１Ａを作製した後、第１実施形態と同様に、冷却→湯口切断→熱処理→機械加工を行ってキャリパ半体１１，１２を作製する。また、同様の工程でインナー側キャリパ半体１２を作製する。そして、両キャリパ半体１１，１２の接合面１３ａ同士を摩擦攪拌接合により結合する。その後、図１４に示すように、例えばインナー側キャリパ半体１２の表面側からドリル等の工具４によってインナー側キャリパ半体１２の第１の連通路３１に連通すると共に、キャリパ半体１１，１２の接合面を貫通しアウター側キャリパ半体１１の第１の連通路３１に連通する第２の連通路３２を形成する。第２の連通路３２を形成するために外部に開口した部分には塞ぎ部材５が閉塞される。 In this case, as shown in FIGS. 13 and 15, the shell core 70 </ b> A includes two substantially cylindrical cylinder forming portions 71 arranged in parallel, a connecting path forming portion 72 that connects both the cylinder forming portions 71, One end is connected to the cylinder forming portion 71, and the other end is composed of a pair of first communication path forming portions 75 having a bent portion 73 located at an intermediate portion of the bridge portion 13. The shell core 70A formed in this way is set in a lower mold (not shown), and the caliper half, for example, the material 11A of the outer caliper half 11 is removed in the same process as in the first and second embodiments. After the production, the caliper halves 11 and 12 are produced by performing cooling → cutting of the gate → heat treatment → machining as in the first embodiment. In addition, the inner caliper half 12 is manufactured in the same process. And the joining surfaces 13a of both caliper halves 11 and 12 are joined by friction stir welding. Thereafter, as shown in FIG. 14, for example, a tool 4 such as a drill communicates with the first communication path 31 of the inner caliper half 12 from the surface side of the inner caliper half 12 and the caliper halves 11 and 12. A second communication path 32 is formed which penetrates the joint surface of the outer caliper and communicates with the first communication path 31 of the outer caliper half 11. The closing member 5 is closed at a portion opened to the outside in order to form the second communication path 32.

上記のように構成される第３実施形態のキャリパ１０Ｂによれば、キャリパ半体１１，１２の鋳造時に鋳込まれ、鋳造後に除去されるシェル中子７０Ａによってシリンダ部２０に連通する第１の連通路３１を形成し、キャリパ半体１１，１２同士の接合後に、第１の連通路３１に連通してキャリパ半体１１，１２の接合面に開口する第２の連通路３２を形成することができる。したがって、連通路３０すなわち空洞部のない状態でキャリパ半体１１，１２同士を容易に摩擦攪拌接合することができる。 According to the caliper 10B of the third embodiment configured as described above, the first caliper 10A is communicated with the cylinder portion 20 by the shell core 70A that is cast when the caliper halves 11 and 12 are cast and is removed after casting. The communication path 31 is formed, and after the caliper halves 11 and 12 are joined together, the second communication path 32 that communicates with the first communication path 31 and opens on the joining surface of the caliper halves 11 and 12 is formed. Can do. Therefore, the caliper halves 11 and 12 can be easily friction stir welded without the communication passage 30, that is, without the hollow portion.

なお、第３実施形態において、インナー側キャリパ半体１２の一方の第２の連通路３２を利用して空気抜き孔１６を設けることができる。空気抜き孔１６の形成に際して、図示しないドリルを用いて空気抜き孔側の連通路３２’も形成すると共に取付用雌ねじ１６ｂを刻設する。 In the third embodiment, the air vent hole 16 can be provided by using one second communication passage 32 of the inner caliper half 12. When forming the air vent hole 16, a communication passage 32 'on the air vent hole side is also formed using a drill (not shown), and a female screw 16b for mounting is engraved.

第３実施形態において、その他の部分は第１実施形態と同じであるので、同一部分には同一符号を付して説明は省略する。 In the third embodiment, the other parts are the same as those in the first embodiment, so the same parts are denoted by the same reference numerals and description thereof is omitted.

＜第４実施形態＞
図１６は、この発明の第４実施形態に係るキャリパの摩擦攪拌接合後の状態を示す平面図、図１７は、第４実施形態のキャリパの一部を断面で示す平面図である。 <Fourth embodiment>
FIG. 16 is a plan view showing a state after the friction stir welding of the caliper according to the fourth embodiment of the present invention, and FIG. 17 is a plan view showing a part of the caliper of the fourth embodiment in cross section.

第４実施形態は、キャリパ半体１１，１２同士を摩擦攪拌接合によって結合する前又は後に、シリンダ部２０同士を連通する連通路３０ａとシリンダ部より側方に伸びる連通路３１を機械加工によって形成し、キャリパ半体１１，１２同士を摩擦攪拌接合によって結合した後に機械加工によりキャリパ半体１１，１２同士の接合部を貫通し双方のキャリパ半体１１，１２の貫通路のそれぞれ連通する連通路３２を形成した場合である。 In the fourth embodiment, before or after the caliper halves 11 and 12 are joined to each other by friction stir welding, a communication passage 30a that connects the cylinder portions 20 and a communication passage 31 that extends laterally from the cylinder portions are formed by machining. The caliper halves 11 and 12 are joined by friction stir welding, and then are connected to each other through the joints of the caliper halves 11 and 12 by machining. 32 is formed.

すなわち、第４実施形態は、キャリパ半体１１，１２を鋳造する際に、並列する２個のシリンダ部２０を形成し、キャリパ半体１１，１２同士を摩擦攪拌接合の前又は後に、各キャリパ半体１１，１２に両シリンダ部２０に連通する第１の連通路３０を形成すると共に、キャリパ半体１１，１２同士を摩擦攪拌接合の後に両キャリパ半体１１，１２の第１の連通路３１を連通する第２の連通路３２を形成した場合である。 That is, in the fourth embodiment, when the caliper halves 11 and 12 are cast, the two cylinder portions 20 are formed in parallel, and the caliper halves 11 and 12 are connected to each caliper before or after the friction stir welding. A first communication passage 30 communicating with both cylinder portions 20 is formed in the half bodies 11 and 12, and the caliper halves 11 and 12 are connected to each other after friction stir welding. This is a case where a second communication path 32 that communicates 31 is formed.

両連通路３１，３２の加工をキャリパ半体１１，１２同士を摩擦攪拌接合後に行う場合は、キャリパ半体１１，１２同士を摩擦攪拌接合した状態で、図１７に示すように、まず、アウター側キャリパ半体１１及びインナー側キャリパ半体１２の一側面側からドリル等の工具４によってシリンダ部２０に連通する第１の連通路３１を形成する。次に、インナー側キャリパ半体１２の表面側からドリル等の工具４によって、両キャリパ半体１１，１２に形成された第１の連通路３１に連通する第２の連通路３２を形成する。なお、第１及び第２の連通路３１，３２を形成するために外部に開口した部分には塞ぎ部材５が閉塞される。 In the case where the processing of both the communication paths 31 and 32 is performed after the caliper halves 11 and 12 are subjected to friction stir welding, as shown in FIG. A first communication path 31 that communicates with the cylinder portion 20 from one side of the side caliper half 11 and the inner caliper half 12 by a tool 4 such as a drill is formed. Next, a second communication path 32 communicating with the first communication path 31 formed in both the caliper halves 11 and 12 is formed from the surface side of the inner caliper half 12 by a tool 4 such as a drill. The closing member 5 is closed at a portion opened to the outside in order to form the first and second communication passages 31 and 32.

上記のように構成される第４実施形態のキャリパ１０Ｃによれば、キャリパ半体１１，１２の鋳造時にシリンダ部２０を形成し、キャリパ半体１１，１２同士の接合後に、シリンダ部２０に連通する第１の連通路３１と、第１の連通路３１に連通する第２の連通路３２を形成することができる。したがって、連通路３０（第２の連通路３２）すなわち空洞部のない状態でキャリパ半体１１，１２同士を容易に摩擦攪拌接合することができる。 According to the caliper 10C of the fourth embodiment configured as described above, the cylinder portion 20 is formed when the caliper halves 11 and 12 are cast, and the caliper halves 11 and 12 communicate with the cylinder portion 20 after joining. The first communication path 31 and the second communication path 32 communicating with the first communication path 31 can be formed. Therefore, the caliper halves 11 and 12 can be easily friction stir welded without the communication passage 30 (second communication passage 32), that is, without a hollow portion.

なお、第４実施形態において、第３実施形態と同様に、インナー側キャリパ半体１２の一方の第２の連通路３２を利用して空気抜き孔１６を設けることができる。第４実施形態において、その他の部分は第１実施形態と同じであるので、同一部分には同一符号を付して説明は省略する。 In the fourth embodiment, similarly to the third embodiment, the air vent hole 16 can be provided using one second communication passage 32 of the inner caliper half 12. In the fourth embodiment, the other parts are the same as those in the first embodiment, so the same parts are denoted by the same reference numerals and description thereof is omitted.

＜その他の実施形態＞
（１）＜第５実施形態＞
上記第３実施形態では、キャリパ半体１１，１２を鋳造する際に、シリンダ部２０と連通路３０ａとをシェル中子７０Ａによって形成し、鋳造後にシェル中子７０Ａを除去して、キャリパ半体１１，１２同士を摩擦攪拌接合した後に、接合部の連通路すなわち第１の連通路３１に連通する第２の連通路３２を形成した場合について説明したが、第１の連通路３１と第２の連通路３２を別の方法で形成してもよい。例えば、図１８に示すように、キャリパ半体１１，１２を鋳造する際に、２個のシリンダ形成部７１と連通路形成部７２とからなるシェル中子７０Ｂを用いて並列する２個のシリンダ部２０と、両シリンダ部２０を連結する連通路３０ａとを形成すると共に、鋳抜きピン８０を用いてシリンダ部２０に連通する第２の連通路３２Ａを形成してもよい。 <Other embodiments>
(1) <Fifth Embodiment>
In the third embodiment, when the caliper halves 11 and 12 are cast, the cylinder portion 20 and the communication passage 30a are formed by the shell core 70A, and after the casting, the shell core 70A is removed, and the caliper halves are formed. Although the case where the second communication path 32 communicating with the communication path of the joint portion, that is, the first communication path 31 is formed after the friction stir welding between the first and second paths 12 and 12 has been described, the first communication path 31 and the second communication path 32 are described. The communication path 32 may be formed by another method. For example, as shown in FIG. 18, when casting the caliper halves 11 and 12, two cylinders arranged in parallel using a shell core 70B composed of two cylinder forming portions 71 and a communication path forming portion 72 are used. While forming the part 20 and the communication path 30a which connects both the cylinder parts 20, you may form the 2nd communication path 32A connected to the cylinder part 20 using the casting pin 80. FIG.

このようにして、キャリパ半体１１，１２例えばアウター側キャリパ半体１１の素材１１Ａを作製した後、第１実施形態と同様に、冷却→湯口切断→熱処理→機械加工を行ってキャリパ半体１１，１２を作製する。また、同様の工程でインナー側キャリパ半体１２を作製する。そして、両キャリパ半体１１，１２の接合面１３ａ同士を摩擦攪拌接合により結合してキャリパ１０Ｄを作製する（図１９参照）。 In this way, after the caliper halves 11 and 12, for example, the material 11A of the outer caliper halves 11 are produced, the caliper halves 11 are subjected to cooling → pouring cutting → heat treatment → machining as in the first embodiment. , 12 are produced. In addition, the inner caliper half 12 is manufactured in the same process. Then, the calipers 10D are manufactured by joining the joint surfaces 13a of the caliper halves 11 and 12 by friction stir welding (see FIG. 19).

（２）＜第６実施形態＞
上記第４実施形態では、キャリパ半体１１，１２同士を摩擦攪拌接合によって結合する前又は後に、シリンダ部２０同士を連通する連通路３０ａとシリンダ部より側方に伸びる連通路３１を機械加工によって形成し、キャリパ半体１１，１２同士を摩擦攪拌接合によって結合した後に機械加工によりキャリパ半体１１，１２同士の接合部を貫通し双方のキャリパ半体１１，１２の貫通路のそれぞれ連通する連通路３２を形成した場合について説明したが、別の機械加工によって連通路３０ａ，３２Ｂを形成することも可能である。例えば、鋳造によってシリンダ部２０が形成されたキャリパ半体１１，１２同士を摩擦攪拌接合によって結合する前に、図２０に示すように、キャリパ半体例えばアウター側キャリパ半体１１の一方のシリンダ部２０の開口側よりドリル等の工具４を挿入してシリンダ部２０の底面角部に傾斜状の連通路３０ａ１を設ける一方、他方のシリンダ部２０の開口側よりドリル等の工具４を挿入してシリンダ部２０の底面角部に傾斜状の連通路３０ａ２を設けて、連通路３０ａ１と連通路３０ａ２とを連通して連通路３０ａを形成する。また、図２０に示すように、キャリパ半体１１の一方の接合面１３ａ側よりドリル等の工具４によって接合面１３ａと一方のシリンダ部２０とを貫通する第２の連通路３２Ｂを形成する一方、他方の接合面１３ａ側より同様にして、他方のシリンダ部２０に貫通する第２の連通路３２Ｂを形成する。 (2) <Sixth Embodiment>
In the fourth embodiment, before or after the caliper halves 11 and 12 are joined together by friction stir welding, the communication passage 30a that connects the cylinder portions 20 and the communication passage 31 that extends laterally from the cylinder portions are machined. After the caliper halves 11 and 12 are joined by friction stir welding, the caliper halves 11 and 12 are joined by machining to connect the caliper halves 11 and 12 to each of the through paths of the caliper halves 11 and 12. Although the case where the passage 32 is formed has been described, the communication passages 30a and 32B can be formed by another machining. For example, before the caliper halves 11 and 12 in which the cylinder portion 20 is formed by casting are joined by friction stir welding, as shown in FIG. 20, one cylinder portion of the caliper half, for example, the outer caliper half 11 is formed. A tool 4 such as a drill is inserted from the opening side of the cylinder 20 to provide an inclined communication passage 30a1 at the corner of the bottom surface of the cylinder part 20, while a tool 4 such as a drill is inserted from the opening side of the other cylinder part 20 An inclined communication path 30a2 is provided at the bottom corner of the cylinder portion 20, and the communication path 30a is connected to the communication path 30a2 to form the communication path 30a. In addition, as shown in FIG. 20, a second communication path 32 </ b> B that penetrates the joining surface 13 a and the one cylinder portion 20 from the one joining surface 13 a side of the caliper half 11 by a tool 4 such as a drill is formed. In the same manner from the other joint surface 13a side, the second communication passage 32B penetrating the other cylinder portion 20 is formed.

上記のようにして、機械加工によって連通路３０ａ（３０ａ１，３０ａ２）と第２の連通路３２Ｂを形成した後、両キャリパ半体１１，１２のブリッジ部１３同士を第１実施形態と同様に、摩擦攪拌接合により結合してキャリパ１０Ｅを作製する（図２１参照）。 After forming the communication path 30a (30a1, 30a2) and the second communication path 32B by machining as described above, the bridge portions 13 of the caliper halves 11 and 12 are connected to each other in the same manner as in the first embodiment. The caliper 10E is manufactured by friction stir welding (see FIG. 21).

（３）＜第７実施形態＞
上記第１ないし第６実施形態では、接合面１３ａが１つの平坦面を形成するように形成したが、必ずしも１つの平坦面で形成する必要はなくキャリパ半体同士が接合後一体になればよいのであって接合線が折れ曲がっていても曲線になっていてもよい。また、図２２に示すように、キャリパ半体１１，１２の接合部に、両端部が平坦接合面１３ｂ１を有し、中央部に互いに嵌合可能な凹凸状接合面１３ｂ２を有する略ハット状の接合面１３ｂとしてもよい。このように、キャリパ半体１１，１２の接合部を凹凸状の接合面１３ｂとすることにより、直線状の接合に比べて摩擦攪拌接合による強度の低下を抑制することができる。このようにすることにより、摩擦攪拌接合時にブリッジ部１３の内方側角部等にて集中応力が生じそうな箇所を避けて接合部を形成する等設計の自由度が増すことができ、摩擦攪拌接合により生じる強度の低下を勘案した設計とできる。 (3) <Seventh Embodiment>
In the first to sixth embodiments, the bonding surface 13a is formed so as to form one flat surface. However, it is not always necessary to form the bonding surface 13a as a single flat surface, and the caliper halves may be integrated after bonding. Therefore, the joining line may be bent or curved. Further, as shown in FIG. 22, both ends of the caliper halves 11 and 12 have a flat joint surface 13b1 and a substantially hat-shaped joint surface 13b2 that can be fitted to each other at the center. It is good also as the joint surface 13b. Thus, by making the joint part of the caliper halves 11 and 12 into the uneven joint surface 13b, it is possible to suppress a decrease in strength due to friction stir welding as compared with the straight joint. By doing so, the degree of freedom of design can be increased, for example, by forming a joint portion by avoiding a location where concentrated stress is likely to occur at the inner corner of the bridge portion 13 at the time of friction stir welding. It can be designed in consideration of strength reduction caused by stir welding.

なお、上記第７実施形態にあっては、シリンダ部２０と凹凸状接合面１３ｂを有するキャリパ半体１１，１２のブリッジ部１３同士を摩擦攪拌接合によって凹凸状接合面１３ｂを接合してキャリパ１０Ｆを作製した後、第４実施形態と同様に、連通路，第１及び第２の連通路を機械加工によって形成してもよいし、第４実施形態以外の実施形態と同様に連通路，第１及び第２の連通路を機械加工によって形成する場合にも適用できることは勿論である。 In the seventh embodiment, the caliper 10F is formed by joining the bridge portions 13 of the caliper halves 11 and 12 having the cylinder portion 20 and the concave-convex joint surface 13b to each other by friction stir welding. After the fabrication, the communication path, the first and second communication paths may be formed by machining, as in the fourth embodiment, or the communication path, the first communication path, as in the embodiments other than the fourth embodiment. Of course, the present invention can also be applied when the first and second communication paths are formed by machining.

（４）なお、上記実施形態では、キャリパ半体１１，１２を重力金型鋳造法によって作製する場合について説明したが、キャリパ半体１１，１２の作製は必ずしも重力金型鋳造法である必要はない。例えば、キャリパ半体１１，１２の作製を、ダイキャスト法，スクイズキャスト法，チクソキャスト法あるいはレオキャスト法によって作製してもよい。また鍛造ないし鋳造と鍛造を組合せて作製してもよい。 (4) In the above embodiment, the caliper halves 11 and 12 are manufactured by the gravity mold casting method. However, the caliper halves 11 and 12 need not necessarily be manufactured by the gravity mold casting method. Absent. For example, the caliper halves 11 and 12 may be manufactured by die casting, squeeze casting, thixocasting, or rheocasting. Further, forging or casting and forging may be combined.

上記実施形態の説明ではシェル中子を利用した例を示したがシェル中子に代えて流体を利用してバインダを溶解させて鋳造後除去できる崩壊製中子や、適宜溶剤を利用して溶解可能な他の可溶中子等も利用できる。 In the description of the above embodiment, an example in which a shell core is used has been shown. However, instead of the shell core, a fluid can be used to dissolve the binder, which can be removed after casting, or a suitable solvent. Other possible soluble cores can also be used.

この発明の第１実施形態に係るキャリパの平面図（ａ）及び該キャリパの摩擦攪拌接合部を示す断面図（ｂ）である。It is sectional drawing (b) which shows the top view (a) of the caliper which concerns on 1st Embodiment of this invention, and the friction stir welding part of this caliper. この発明における摩擦攪拌接合によって表面側を接合する状態を示す要部断面図（ａ）、裏面側を接合する状態を示す要部断面図（ｂ）、摩擦攪拌接合工具の摩擦ピンの長さが異なる状態を示す要部断面図（ｃ），（ｄ）である。Sectional view (a) of the main part showing the state of joining the front side by friction stir welding in this invention, sectional view (b) of the main part showing the state of joining the back side, the length of the friction pin of the friction stir welding tool It is principal part sectional drawing (c), (d) which shows a different state. この発明におけるアウター側のキャリパ半体素材を示す平面図（ａ）、正面図（ｂ）及び側面図（ｃ）である。It is the top view (a), front view (b), and side view (c) which show the caliper half body material of the outer side in this invention. この発明におけるインナー側のキャリパ半体素材を示す平面図（ａ）、正面図（ｂ）及び側面図（ｃ）である。It is the top view (a), front view (b), and side view (c) which show the caliper half body material of the inner side in this invention. この発明におけるアウター側のキャリパ半体の接合前の状態を示す平面図（ａ）、正面図（ｂ）及び側面図（ｃ）である。It is the top view (a), front view (b), and side view (c) which show the state before joining of the caliper half body of the outer side in this invention. この発明におけるインナー側のキャリパ半体の接合前の状態を示す平面図（ａ）、正面図（ｂ）及び側面図（ｃ）である。It is the top view (a), front view (b), and side view (c) which show the state before joining of the caliper half bodies of the inner side in this invention. キャリパ半体の鋳造用金型を示す断面図（ａ）及び金型の湯口を示す要部断面図（ｂ）である。It is sectional drawing (a) which shows the metal mold | die for casting of a caliper half, and principal part sectional drawing (b) which shows the gate of a metal mold | die. この発明におけるキャリパ半体の別の摩擦攪拌接合の状態を示す要部断面図（ａ），（ｂ）及びキャリパ半体の更に別の摩擦攪拌接合の状態を示す要部断面図（ｃ）である。Sectional views (a) and (b) showing the state of another friction stir welding of the caliper half according to the present invention, and a sectional view (c) of the relevant part showing another state of the friction stir welding of the caliper half. is there. この発明の第２実施形態に係るキャリパを示す平面図である。It is a top view which shows the caliper which concerns on 2nd Embodiment of this invention. この発明の第２実施形態におけるキャリパ半体を示す平面図（ａ）、正面図（ｂ）及び側面図（ｃ）である。It is the top view (a), front view (b), and side view (c) which show the caliper half body in 2nd Embodiment of this invention. 第２実施形態におけるシェル中子を示す斜視図である。It is a perspective view which shows the shell core in 2nd Embodiment. この発明の第３実施形態に係るキャリパを示す平面図である。It is a top view which shows the caliper which concerns on 3rd Embodiment of this invention. 第３実施形態におけるキャリパ半体の平面図（ａ）、正面図（ｂ）及び側面図（ｃ）である。It is the top view (a), front view (b), and side view (c) of the caliper half body in 3rd Embodiment. この発明の第３実施形態に係るキャリパの一部を断面で示す平面図である。It is a top view which shows a part of caliper concerning 3rd Embodiment of this invention in a cross section. 第３実施形態におけるシェル中子を示す斜視図である。It is a perspective view which shows the shell core in 3rd Embodiment. この発明の第４実施形態に係るキャリパの摩擦攪拌接合後の状態を示す平面図である。It is a top view which shows the state after the friction stir welding of the caliper which concerns on 4th Embodiment of this invention. 第４実施形態のキャリパの一部を断面で示す平面図である。It is a top view which shows a part of caliper of 4th Embodiment in a cross section. この発明の第５実施形態におけるキャリパ半体の平面図（ａ）、正面図（ｂ）及び側面図（ｃ）である。It is the top view (a), front view (b), and side view (c) of the caliper half body in 5th Embodiment of this invention. 第５実施形態に係るキャリパを示す平面図である。It is a top view which shows the caliper which concerns on 5th Embodiment. この発明の第６実施形態におけるキャリパ半体の平面図（ａ）、正面図（ｂ）及び側面図（ｃ）である。It is the top view (a), front view (b), and side view (c) of the caliper half body in 6th Embodiment of this invention. 第６実施形態に係るキャリパを示す平面図である。It is a top view which shows the caliper which concerns on 6th Embodiment. この発明の第７実施形態に係るキャリパの摩擦攪拌接合後の状態を示す平面図である。It is a top view which shows the state after the friction stir welding of the caliper which concerns on 7th Embodiment of this invention.

Explanation of symbols

２ディスク収容空間
３回転ツール
４ドリル等の工具
１０，１０Ａ，１０Ｂ，１０Ｃ，１０Ｄ，１０Ｅ，１０Ｆキャリパ
１１アウター側キャリパ半体
１２インナー側キャリパ半体
１３ブリッジ部
１３ａ接合面
１３ｂ凹凸状接合面
１７位置決め用凸部
１７ａ位置決めピン
１８位置決め用凹部
１８ａピン穴
２０シリンダ部
３０連通路
３０ａ連結路
３０ｂ連通路
３１第１の連通路
３２，３２Ａ，３２Ｂ第２の連通路
４０パイプ部材
６０，６０Ａパイプ部材を有する部分
７０，７０Ａ，７０Ｂシェル中子 2 Disc housing space 3 Rotating tool 4 Tools 10, 10A, 10B, 10C, 10D, 10E, 10F such as a drill Caliper 11 Outer caliper half 12 Inner caliper half 13 Bridge portion 13a Joint surface 13b Concave joint surface 17 Positioning convex part 17a Positioning pin 18 Positioning concave part 18a Pin hole 20 Cylinder part 30 Communication path 30a Connection path 30b Communication path 31 First communication path 32, 32A, 32B Second communication path 40 Pipe members 60, 60A Pipe member 70, 70A, 70B having a shell core

Claims

A pair of caliper halves having one of the opposing cylinder portions are connected by a bridge portion leaving a disc accommodation space, and an opposing piston that presses a brake pad against the disc by a piston that is slidably inserted into the cylinder portion. Caliper for type disc brake
The caliper half is divided and molded with the bridge portion as a boundary, and the caliper half has a communication passage communicating with the cylinder portion, and the outer thickness of the communication passage in the bridge portion is a portion other than the communication passage. The caliper halves of the caliper halves are made the same thickness, and the stirring depth of the rotary tool of the friction stir welding tool is kept constant so as to avoid the communication path. A caliper for an opposed piston type disc brake, characterized by being joined by friction stir welding .

In the caliper for opposed piston type disc brake according to claim 1,
A caliper for opposing piston type disc brakes, wherein the friction stir joints of the communication passages are formed in the same bulging shape on both the inside and outside of the bridge portion.

In the caliper for opposed piston type disc brake according to claim 1,
The opposed piston type disk, wherein the friction stir welding portion of the communication path is formed in a bulge shape on the outer peripheral side of the bridge portion, and the inner peripheral side is formed in an arc shape continuous with a portion other than the communication path. Brake caliper.

In the caliper for opposing piston type disc brakes according to any one of claims 1 to 3 ,
The opposed piston type disc, wherein a positioning convex portion is provided on one of the joint surfaces of the two caliper halves, and a positioning concave portion capable of being fitted to the convex portion is provided on the other. Brake caliper.

In the caliper for opposed piston type disc brake according to any one of claims 1 to 4 ,
The caliper for an opposed piston type disc brake, wherein the communication passage communicating with the cylinder portion of the caliper half is formed by a pipe member cast when the caliper half is cast.

In the caliper for opposed piston type disc brake according to any one of claims 1 to 4 ,
A caliper for an opposed piston type disc brake, wherein the communication passage communicating with the cylinder portion of the caliper half is formed by a core that is cast when the caliper half is cast and is removable after casting.

In the caliper for opposed piston type disc brake according to any one of claims 1 to 4 ,
The opposed piston type disk, wherein the communication path communicating with the cylinder portion of the caliper half is formed after the caliper half is cast and before the caliper halves are joined by the friction stir welding. Brake caliper.

In the caliper for opposed piston type disc brake according to any one of claims 1 to 4,
A first communication passage that communicates the two cylinder parts of the caliper half is formed by a core that is cast when the caliper half is cast and can be removed after casting, and communicates with both the cylinder parts. The caliper for the opposed piston type disc brake, wherein the two communication paths are formed by using a cast pin.

In the caliper for opposed piston type disc brake according to any one of claims 1 to 4,
A first communication path that communicates the two cylinder parts of the caliper half is formed by a communication path that is provided from the opening side of both cylinder parts, and the second communication path that communicates with the cylinder part is the caliper. A caliper for an opposed piston type disc brake, characterized in that it is formed by a communication passage provided from both joint surfaces of a half body.