WO2010106616A1 - Soldered joint structure - Google Patents
Soldered joint structure Download PDFInfo
- Publication number
- WO2010106616A1 WO2010106616A1 PCT/JP2009/055033 JP2009055033W WO2010106616A1 WO 2010106616 A1 WO2010106616 A1 WO 2010106616A1 JP 2009055033 W JP2009055033 W JP 2009055033W WO 2010106616 A1 WO2010106616 A1 WO 2010106616A1
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- WO
- WIPO (PCT)
- Prior art keywords
- brazing material
- members
- joint structure
- planetary carrier
- flat plate
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
- B23K3/06—Solder feeding devices; Solder melting pans
- B23K3/0607—Solder feeding devices
- B23K3/0623—Solder feeding devices for shaped solder piece feeding, e.g. preforms, bumps, balls, pellets, droplets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/14—Soldering, e.g. brazing, or unsoldering specially adapted for soldering seams
- B23K1/18—Soldering, e.g. brazing, or unsoldering specially adapted for soldering seams circumferential seams, e.g. of shells
Definitions
- This invention relates to a structure constituted by brazing a plurality of members.
- the planetary carrier described in Japanese Patent Application Laid-Open No. 2003-251458 has a first member in which three legs are erected at equal intervals on one surface of an annular plate, and an annular plate. The two members are formed of sintered metal, and the second member is brazed to the tip of the leg portion of the first member. Since this planetary carrier rotatably holds the pinion gear between the first member and the second member, a hole for holding the pinion pin is formed in the first member and the second member. become. Therefore, it is necessary to accurately determine the relative positions of the first member and the second member so that the center axes of the holes that are paired with each other exactly match each other.
- a protrusion is formed on one member and a recess is formed on the other member. ing. That is, a protrusion is formed on one of the surfaces to be joined to each other by the brazing material, and a concave portion into which the protrusion is fitted is formed on the other surface.
- the height of the protrusion is set slightly larger than the depth of the recess. Accordingly, by fitting the protrusions into the recesses, the relative positions of the first member and the second member are determined, and at the same time, a joining clearance for inserting the brazing material is formed between the joining surfaces of these members. It has become. According to the description in Japanese Patent Application Laid-Open No. 2003-251458, the brazing material is put in a hole formed in one of the joining surfaces.
- the brazing material is melted by heating the first member and the second member that are positioned with respect to each other by the protrusions and the concave portions and sandwich the brazing material. Between the joint surfaces of each member, and as a result, each member is brazed.
- JP-A-5-185274 a brazing material is attached to one of the members to be joined to each other by an adhesive, the other member is positioned by a predetermined means and brought into contact with the brazing material.
- a method for joining two members by melting a brazing material in a state is described.
- Japanese Patent Application Laid-Open No. 61-52981 describes a configuration for positioning a brazing material.
- Japanese Patent Laid-Open No. 2002-79372 describes a configuration similar to the configuration described in Japanese Patent Laid-Open No. 2003-251458 described above.
- brazing is performed by placing a brazing material between two relatively positioned members, melting the brazing material, and penetrating between the joining surfaces of the two members. Yes.
- a protrusion formed on one member is formed on the other member. This is done by fitting it into the recessed portion.
- the brazing material is formed in a shaft shape or a rod shape, and this is placed inside a hole formed in one of the members, and when the two members to be joined are heated to sinter, The brazing material is melted and permeated between the two members.
- the joint surfaces formed on the members are substantially smooth surfaces and are opposed to each other at a constant interval, so that the molten brazing material smoothly penetrates between the joint surfaces.
- the penetration of the molten brazing material may be hindered at the location where the projection for positioning the two members to be joined is formed.
- the brazing material is filled between the joint surfaces, whereas on the opposite side, the brazing material is sufficient. In some cases, the stress may be concentrated.
- the planetary carrier described in Japanese Patent Application Laid-Open No. 2003-251458 and Japanese Patent Application Laid-Open No. 2002-79372 may be used with one side surface fixed to a housing or the like.
- the planetary carrier when torque is transmitted through the pinion gear held by the planetary carrier, the planetary carrier is supported in a so-called cantilever shape, so that a large bending stress or shearing force acts. Therefore, when stress concentrates as described above, durability and strength may be reduced.
- the present invention has been made paying attention to the above technical problem, and aims to provide a brazed joint structure in which the position accuracy of two members to be joined is high and stress concentration is unlikely to occur. is there.
- the present invention provides a brazed joint structure in which a brazing material is melted and permeated between two relatively positioned members to join the two members.
- Each of the two members has a joint surface facing each other, a brazing material holding portion for holding the brazing material in a state protruding from the joint surface is formed on one of the members, and the other member has A fitting portion that determines a relative position with respect to the one member via the brazing material is formed by closely fitting to the end portion side of the brazing material protruding from the joining surface. It is characterized by this.
- the fitting portion formed on the other member includes a concave portion having an end surface that abuts an end portion of the brazing material, and the depth of the concave portion is A brazed joint structure characterized by being shallower than a length protruding from the joint surface of the brazing material.
- the two members are held by the brazing material holding portion and the brazing material fitted in the recess has a predetermined gap between the respective joint surfaces.
- a brazed joint structure characterized in that a brazing material that is held in a pressed state and melted in the gap is infiltrated and joined.
- the present invention is the brazed joint structure according to any one of the above-described inventions, wherein the two members are formed of a sintered metal obtained by compression-molding and sintering a metal powder.
- the one member includes a planetary carrier main body formed by projecting a plurality of bridge portions on one surface of the annular flat plate portion, and the other member
- the member is a brazed joint structure characterized by including a planetary carrier flat plate joined to the tip of the bridge portion.
- the fitting portion formed on the other member is closely fitted to the brazing material held on one member, and the brazing material is melted in this state, and the joining surface of each member
- the two members are brazed so as to penetrate between the two. Therefore, the two members are positioned via the brazing material by determining the relative positions of the brazing material holding portion and the fitting portion in advance. For this reason, only the brazing material is interposed between the joint surfaces of the two members, and there is no need for conventional positioning members or portions such as protrusions and recesses. Will not be disturbed. As a result, it is possible to obtain a structure that is securely brazed and does not cause stress concentration or durability deterioration due to the stress concentration. Moreover, the relative positional accuracy of the two members is increased.
- the gap through which the molten brazing material permeates can be secured by the brazing material, so that the two members are securely brazed, and the stress concentration and the resulting deterioration in durability do not occur. You can get a body.
- the present invention it is possible to obtain a sintered metal product in which the two members are securely brazed and the stress concentration and the deterioration of durability resulting therefrom are not caused.
- a planetary carrier in which the two members are securely brazed, and thus have good strength or durability.
- the structure according to the present invention has two members that are brazed, and these two members are metal products.
- the brazing material used for the brazing is a conventionally known brazing material such as gold brazing, silver brazing, or brass brazing. Therefore, the metal material constituting each of the two members may be any material that can be joined by any one of these brazing materials.
- the metal material includes a sintered metal, and thus an example of the structure is a planetary carrier made of sintered metal.
- FIG. 1 schematically shows an example of a planetary carrier 1, and the planetary carrier 1 is composed of two members, a main body 2 and a flat plate 3.
- the main body portion 2 includes an annular flat plate portion 4 and a plurality of (four in the illustrated example) bridge portions 5 formed to protrude from one side surface thereof.
- the flat plate 3 is an annular plate-like member having substantially the same shape as the flat plate 4 in the main body 2.
- the planetary carrier 1 is comprised by brazing these main-body parts 2 and the flat body 3 and integrating them. That is, by bringing the end of the bridge portion 5 into contact with the flat plate 3 and brazing the portion, the main body 2 and the flat plate 3 are integrated to form the planetary carrier 1.
- the planetary carrier 1 configured in this manner is made of sintered metal, and a metal powder is put into a predetermined mold and compressed by pressure to make a green compact of the main body 2 and the flat plate 3.
- the planetary carrier 1 is manufactured by assembling and firing the green compacts and brazing.
- FIG. 2 is a cross-sectional view schematically showing the recesses 8 and 9 and the brazing material 10 fitted thereto, and the brazing material 10 shown here is a linear chip. Is a shallow hole formed so that its opening shape or cross-sectional shape is the same as the cross-sectional shape of the linear brazing material 10. Since the low chip is generally formed in a line shape with a round cross section, each of the recesses 8 and 9 has a round hole correspondingly.
- the outer diameter of the brazing material 10 and the inner diameter of the recesses 8 and 9 may be matched to fit closely together, but instead, the inner periphery of the brazing material 10 and the recesses 8 and 9 may be configured. By sandwiching the sheet material 11 that is heated and disappears between the surfaces, the both may be substantially closely fitted.
- Each of the recesses 8 and 9 is formed such that the center portion thereof coincides with the same axis in a state where the main body 2 and the flat plate 3 are relatively positioned at regular positions. Therefore, the brazing material 10 is inserted and held in one concave portion (for example, the concave portion of the flat plate 3), and the other concave portion (for example, the concave portion of the main body portion 2) is disposed at the end of the brazing material 10 protruding from the concave portion 9. When 8 is fitted, the relative position between the main body 2 and the flat plate 3 is determined via the brazing material 10.
- the length of the brazing material 10 is set longer than the total depth of the recesses 8 and 9.
- the brazing material 10 is inserted and held in the concave portion 9 of the flat plate 3, and the length L 1 of the brazing material 10 protruding from the joining surface 7 of the flat plate 3 in this state is the length of the concave portion 8 of the main body 2. It is set longer than the depth L2. Therefore, in a state where the main body 2 and the flat plate 3 are relatively positioned via the brazing material 10, a gap C is formed between the joint surfaces 6 and 7.
- This gap C is the difference between the sum of the depths of the recesses 8 and 9 and the length of the brazing material 10, or the protruding length L 1 of the brazing material 10 from the joint surface 7 and the depth L 2 of the other recess 8. Therefore, by adjusting these dimensional differences, the gap C between the joint surfaces 6 and 7 can be adjusted to an interval suitable for brazing.
- the manufacturing procedure of the planetary carrier 1 that is the above-described brazed joint structure will be described. Since the planetary carrier 1 described here is made of sintered metal, first, green compacts of the main body 2 and the flat plate 3 which are constituent elements are manufactured. This may be a method generally performed in the field of conventional powder metallurgy, and is performed by filling metal powder into a mold prepared corresponding to each and pressing. The green compact for the main body and the green compact for the flat plate thus obtained are assembled. In that case, as shown in FIG. 2 described above, the brazing material 10 is brought into close contact with the recesses 8 and 9 formed in the respective green compacts. By doing so, the main body 2 and the flat plate 3, that is, the respective green compacts are positioned with respect to each other, and a gap C for allowing the brazing material 10 to permeate is secured.
- the green compacts that have been assembled with their relative positions determined via the brazing material 10 are placed in a sintering furnace (not shown) and heated. Since the melting point of the brazing material 10 is lower than the sintering temperature, the brazing material 10 melts with firing, and the melted brazing material 10 flows into the gap C between the joining surfaces 6 and 7 and spreads. In this case, only the brazing material 10 is interposed between the joining surfaces 6 and 7, and there is nothing that hinders the flow of the molten brazing material 10, so the entire joining surfaces 6 and 7 are melted. The brazing material 10 spread out. As a result, each green compact, that is, the main body portion 2 and the flat plate body 3 can be brazed reliably without causing a wraparound failure of the brazing material 10.
- the planetary carrier 1 excellent in strength and durability can be obtained. Therefore, even if the planetary carrier 1 configured as described above is used in a so-called cantilever state with one side surface fixed to a housing (not shown) or the like, the strength becomes insufficient or early. It is possible to avoid a situation such as a crack in the case.
- the pinion pin that rotatably supports the pinion gear and the through-hole through which the pinion gear is fitted to the planetary carrier are omitted.
- the present invention is not limited to the specific examples described above. That is, in the present invention, it is only necessary that the two members can be positioned by the brazing material, so that one of the recesses that are in close contact with the brazing material may be configured as a through hole. Therefore, one of the concave portions 8 and 9 described above corresponds to the brazing material holding portion of the present invention, and the other corresponds to the fitting portion of the present invention. Further, the structure in the present invention may be a metal product other than the planetary carrier.
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Abstract
The strength and durability of a structure composed of two soldered members are improved. Provided is a soldered joint structure (1) which comprises two members (2 and 3) positioned relative to each other and jointed to each other by melting a solder (10) therebetween and penetrating the same thereinto. The two members (2 and 3) include individually two confronting joint faces (6 and 7). One member (3) has solder holding portions (9) for holding the solder (10) in a state to protrude from the joint face (7), and the other member (2) has fitting portions (8) formed for fitting closely the end portion sides of the solder (10) protruding from the joint face (7), thereby to determine the relative positions to the one member (3) through the solder (10).
Description
この発明は、複数の部材をロウ付けして構成される構造体に関するものである。
This invention relates to a structure constituted by brazing a plurality of members.
この種の構造体あるいはプラネタリキャリアの一例が特開２００３－２５１４５８号公報に記載されている。この特開２００３－２５１４５８号公報に記載されたプラネタリキャリアは、環状の板体の一方の面に、３本の脚部を等間隔に立設した第１部材と、環状の板体である第２部材とを焼結金属で形成し、第１部材の脚部の先端に第２部材をロウ付けして構成されている。このプラネタリキャリアは、第１部材と第２部材との間にピニオンギヤを回転自在に保持するものであるから、第１部材と第２部材とにはピニオンピンを保持するための孔を形成することになる。したがって、第１部材と第２部材とは、互いに対となる孔の中心軸線が正確に一致するように、相対的な位置を正確に決める必要がある。
An example of this type of structure or planetary carrier is described in Japanese Patent Application Laid-Open No. 2003-251458. The planetary carrier described in Japanese Patent Application Laid-Open No. 2003-251458 has a first member in which three legs are erected at equal intervals on one surface of an annular plate, and an annular plate. The two members are formed of sintered metal, and the second member is brazed to the tip of the leg portion of the first member. Since this planetary carrier rotatably holds the pinion gear between the first member and the second member, a hole for holding the pinion pin is formed in the first member and the second member. become. Therefore, it is necessary to accurately determine the relative positions of the first member and the second member so that the center axes of the holes that are paired with each other exactly match each other.
そこで、特開２００３－２５１４５８号公報に記載された発明では、第１部材と第２部材との相対位置を決めるために、一方の部材に突起を形成し、かつ他方の部材に凹部を形成している。すなわち、ロウ材によって互いに接合するべき面の一方に、突起が形成されており、その突起が嵌合する凹部が他方の面に形成されている。そして、その突起の高さは凹部の深さより僅かに大きく設定されている。したがって、突起を凹部に嵌合させることにより、第１部材と第２部材との相対位置が決まり、同時にそれらの部材の接合面の間に、ロウ材を入れるための接合クリアランスが形成されるようになっている。なお、特開２００３－２５１４５８号公報の記載によれば、ロウ材は、一方の接合面に形成された穴に入れておくようになっている。
Therefore, in the invention described in Japanese Patent Application Laid-Open No. 2003-251458, in order to determine the relative position between the first member and the second member, a protrusion is formed on one member and a recess is formed on the other member. ing. That is, a protrusion is formed on one of the surfaces to be joined to each other by the brazing material, and a concave portion into which the protrusion is fitted is formed on the other surface. The height of the protrusion is set slightly larger than the depth of the recess. Accordingly, by fitting the protrusions into the recesses, the relative positions of the first member and the second member are determined, and at the same time, a joining clearance for inserting the brazing material is formed between the joining surfaces of these members. It has become. According to the description in Japanese Patent Application Laid-Open No. 2003-251458, the brazing material is put in a hole formed in one of the joining surfaces.
したがって、特開２００３－２５１４５８号公報に記載された発明では、上記の突起および凹部によって互いに位置決めされ、かつロウ材を挟み込んだ第１部材および第２部材を加熱することにより、ロウ材が溶融して各部材の接合面の間に浸透し、その結果、各部材がロウ付けされる。
Therefore, in the invention described in Japanese Patent Application Laid-Open No. 2003-251458, the brazing material is melted by heating the first member and the second member that are positioned with respect to each other by the protrusions and the concave portions and sandwich the brazing material. Between the joint surfaces of each member, and as a result, each member is brazed.
なお、特開平５－１８５２７４号公報には、互いに接合される部材の一方に、接着剤によってロウ材を取り付けておき、他方の部材を所定の手段で位置決めしてそのロウ材に接触させ、その状態でロウ材が溶融されることにより、二つの部材を接合する方法が記載されている。また、特開昭６１－５２９８１号公報には、ロウ材を位置決めする構成が記載されている。さらに、特開２００２－７９３７２号公報には、上述した特開２００３－２５１４５８号公報に記載された構成と同様の構成が記載されている。
In JP-A-5-185274, a brazing material is attached to one of the members to be joined to each other by an adhesive, the other member is positioned by a predetermined means and brought into contact with the brazing material. A method for joining two members by melting a brazing material in a state is described. Japanese Patent Application Laid-Open No. 61-52981 describes a configuration for positioning a brazing material. Further, Japanese Patent Laid-Open No. 2002-79372 describes a configuration similar to the configuration described in Japanese Patent Laid-Open No. 2003-251458 described above.
上述したように従来では、相対的に位置決めされた二つの部材の間にロウ材を配置し、そのロウ材を溶融させるとともに二つの部材の接合面の間に浸透させることによりロウ付けを行っている。その二つの部材の相対的な位置決めは、例えば特開２００３－２５１４５８号公報や特開２００２－７９３７２号公報に記載されているように、一方の部材に形成された突起を、他方の部材に形成された凹部に嵌合させて行っている。その場合、ロウ材は、軸状もしくは棒状に形成し、これをいずれか一方の部材に形成した穴の内部に立てておき、接合するべき二つの部材を、焼結するために加熱する際にそのロウ材を溶融させて二つの部材の間に浸透させている。
As described above, conventionally, brazing is performed by placing a brazing material between two relatively positioned members, melting the brazing material, and penetrating between the joining surfaces of the two members. Yes. For the relative positioning of the two members, for example, as described in Japanese Patent Application Laid-Open Nos. 2003-251458 and 2002-79372, a protrusion formed on one member is formed on the other member. This is done by fitting it into the recessed portion. In that case, the brazing material is formed in a shaft shape or a rod shape, and this is placed inside a hole formed in one of the members, and when the two members to be joined are heated to sinter, The brazing material is melted and permeated between the two members.
各部材に形成されている接合面は実質的に平滑な面であって、互いに一定の間隔で対向しているので、溶融したロウ材はそれらの接合面の間にスムースに浸透する。しかしながら、接合するべき二つの部材を位置決めするための前記突起が形成されている箇所では、溶融したロウ材の浸透が阻害されることがある。例えば、突起のうち、溶融したロウ材が流れてくる方向を向いている面側では、各接合面の間にロウ材が充満するのに対して、これとは反対側では、ロウ材が十分に回り込まず、そのために応力が集中する箇所が生じることがある。
The joint surfaces formed on the members are substantially smooth surfaces and are opposed to each other at a constant interval, so that the molten brazing material smoothly penetrates between the joint surfaces. However, the penetration of the molten brazing material may be hindered at the location where the projection for positioning the two members to be joined is formed. For example, on the side of the projection that faces the direction in which the molten brazing material flows, the brazing material is filled between the joint surfaces, whereas on the opposite side, the brazing material is sufficient. In some cases, the stress may be concentrated.
前述した特開２００３－２５１４５８号公報や特開２００２－７９３７２号公報に記載されているプラネタリキャリアは、その一方の側面をハウジングなどに固定して使用されることがあり、そのような使用形態の場合、そのプラネタリキャリアによって保持されているピニオンギヤを介してトルクを伝達すると、プラネタリキャリアがいわゆる片持ち状に支持されていることにより、大きい曲げ応力や剪断力が作用する。そのため、上述したように応力が集中すると、耐久性や強度が低下する可能性がある。
The planetary carrier described in Japanese Patent Application Laid-Open No. 2003-251458 and Japanese Patent Application Laid-Open No. 2002-79372 may be used with one side surface fixed to a housing or the like. In this case, when torque is transmitted through the pinion gear held by the planetary carrier, the planetary carrier is supported in a so-called cantilever shape, so that a large bending stress or shearing force acts. Therefore, when stress concentrates as described above, durability and strength may be reduced.
この発明は上記の技術的課題に着目してなされたものであり、接合させる二つの部材の位置精度が高く、かつ応力集中が生じにくいロウ付け接合構造体を提供することを目的とするものである。
The present invention has been made paying attention to the above technical problem, and aims to provide a brazed joint structure in which the position accuracy of two members to be joined is high and stress concentration is unlikely to occur. is there.
上記の目的を達成するために、この発明は、相対的に位置決めされた二つの部材の間に、ロウ材が溶融されて浸透することにより、これら二つの部材が接合されたロウ付け接合構造体において、前記二つの部材のそれぞれが互いに対向する接合面を有し、いずれか一方の部材にその接合面から突出した状態にロウ材を保持するロウ材保持部が形成され、かつ他方の部材に、前記接合面から突出している前記ロウ材の端部側に密着して嵌合することにより、前記ロウ材を介して前記一方の部材に対する相対的な位置を決める嵌合部が形成されていることを特徴とするものである。
To achieve the above object, the present invention provides a brazed joint structure in which a brazing material is melted and permeated between two relatively positioned members to join the two members. Each of the two members has a joint surface facing each other, a brazing material holding portion for holding the brazing material in a state protruding from the joint surface is formed on one of the members, and the other member has A fitting portion that determines a relative position with respect to the one member via the brazing material is formed by closely fitting to the end portion side of the brazing material protruding from the joining surface. It is characterized by this.
また、この発明は、上記の発明において、前記他方の部材に形成されている前記嵌合部は、前記ロウ材の端部を突き当てる端面を有する凹部を含み、その凹部の深さが、前記ロウ材の前記接合面から突出する長さより浅いことを特徴とするロウ付け接合構造体である。
Further, according to the present invention, in the above invention, the fitting portion formed on the other member includes a concave portion having an end surface that abuts an end portion of the brazing material, and the depth of the concave portion is A brazed joint structure characterized by being shallower than a length protruding from the joint surface of the brazing material.
さらに、この発明は、上記の発明において、前記二つの部材は、前記ロウ材保持部に保持されかつ前記凹部に嵌合された前記ロウ材によって、それぞれの接合面の間に所定の隙間が空けられた状態に保持され、かつその隙間に溶融されたロウ材が浸透させられて接合されていることを特徴とするロウ付け接合構造体である。
Further, according to the present invention, in the above invention, the two members are held by the brazing material holding portion and the brazing material fitted in the recess has a predetermined gap between the respective joint surfaces. A brazed joint structure characterized in that a brazing material that is held in a pressed state and melted in the gap is infiltrated and joined.
さらに、この発明は、上記いずれかの発明において、前記二つの部材は、金属粉末を圧縮成形しかつ焼結した焼結金属から形成されていることを特徴とするロウ付け接合構造体である。
Furthermore, the present invention is the brazed joint structure according to any one of the above-described inventions, wherein the two members are formed of a sintered metal obtained by compression-molding and sintering a metal powder.
さらに、この発明は、上記いずれかの発明において、前記一方の部材は、環状平板部の一方の面に複数のブリッジ部が突出させられて形成されたプラネタリキャリア用本体部を含み、前記他方の部材は、前記ブリッジ部の先端に接合されたプラネタリキャリア用平板体を含むことを特徴とするロウ付け接合構造体である。
Further, according to the present invention, in any one of the above inventions, the one member includes a planetary carrier main body formed by projecting a plurality of bridge portions on one surface of the annular flat plate portion, and the other member The member is a brazed joint structure characterized by including a planetary carrier flat plate joined to the tip of the bridge portion.
この発明によれば、一方の部材に保持されたロウ材に、他方の部材に形成された嵌合部が密着して嵌合し、その状態でロウ材を溶融させ、かつ各部材の接合面の間に浸透させて二つの部材がロウ付けされて構成されている。したがって、ロウ材保持部と前記嵌合部との相対的な位置を予め決めておくことにより、二つの部材が、ロウ材を介して位置決めされる。そのため、二つの部材の接合面同士の間にはロウ材が介在するのみであり、従来の突起や凹部などの位置決めのための部材もしくは部分を必要とないので、溶融したロウ材の浸透もしくは流動を阻害することがない。その結果、確実にロウ付けされて応力集中やそれに起因する耐久性の低下などが生じない構造体を得ることができる。しかも、二つの部材の相対的な位置精度が高くなる。
According to this invention, the fitting portion formed on the other member is closely fitted to the brazing material held on one member, and the brazing material is melted in this state, and the joining surface of each member The two members are brazed so as to penetrate between the two. Therefore, the two members are positioned via the brazing material by determining the relative positions of the brazing material holding portion and the fitting portion in advance. For this reason, only the brazing material is interposed between the joint surfaces of the two members, and there is no need for conventional positioning members or portions such as protrusions and recesses. Will not be disturbed. As a result, it is possible to obtain a structure that is securely brazed and does not cause stress concentration or durability deterioration due to the stress concentration. Moreover, the relative positional accuracy of the two members is increased.
特に、この発明によれば、溶融したロウ材を浸透させる隙間を、ロウ材によって確保できるので、二つの部材が確実にロウ付けされ、応力集中やそれに起因する耐久性の低下などが生じない構造体を得ることができる。
In particular, according to the present invention, the gap through which the molten brazing material permeates can be secured by the brazing material, so that the two members are securely brazed, and the stress concentration and the resulting deterioration in durability do not occur. You can get a body.
また、この発明によれば、二つの部材が確実にロウ付けされ、応力集中やそれに起因する耐久性の低下などが生じない焼結金属製品を得ることができる。特にこの発明によれば、二つの部材が確実にロウ付けされ、したがって強度あるいは耐久性が良好なプラネタリキャリアを得ることができる。
Further, according to the present invention, it is possible to obtain a sintered metal product in which the two members are securely brazed and the stress concentration and the deterioration of durability resulting therefrom are not caused. In particular, according to the present invention, it is possible to obtain a planetary carrier in which the two members are securely brazed, and thus have good strength or durability.
この発明に係る構造体は、ロウ付けされた二つの部材を有しており、それらの二つの部材は、金属製品である。そのロウ付けに使用されるロウ材は、金ロウや銀ロウあるいは真鍮ロウなどの従来知られているロウ材である。したがって、二つの部材のそれぞれを構成している金属素材は、これらいずれかのロウ材で接合できるものであればよい。また、その金属素材は、焼結金属を含み、したがって構造体の一例は、焼結金属製のプラネタリキャリアである。
The structure according to the present invention has two members that are brazed, and these two members are metal products. The brazing material used for the brazing is a conventionally known brazing material such as gold brazing, silver brazing, or brass brazing. Therefore, the metal material constituting each of the two members may be any material that can be joined by any one of these brazing materials. In addition, the metal material includes a sintered metal, and thus an example of the structure is a planetary carrier made of sintered metal.
図１にプラネタリキャリア１の一例を模式的に示してあり、このプラネタリキャリア１は、本体部２と平板体３との二つの部材によって構成されている。本体部２は、環状の平板部４と、その一方の側面に突出させて形成された複数（図示の例では四本）のブリッジ部５とを備えている。また、平板体３は、本体部２における平板部４とほぼ同形状の環状の板状部材である。そして、これら本体部２と平板体３とをロウ付けして一体化することによりプラネタリキャリア１が構成されている。すなわち、前記ブリッジ部５の先端を平板体３に接触させ、その部分をロウ付けすることにより、本体部２と平板体３とが一体化されてプラネタリキャリア１が構成される。
FIG. 1 schematically shows an example of a planetary carrier 1, and the planetary carrier 1 is composed of two members, a main body 2 and a flat plate 3. The main body portion 2 includes an annular flat plate portion 4 and a plurality of (four in the illustrated example) bridge portions 5 formed to protrude from one side surface thereof. The flat plate 3 is an annular plate-like member having substantially the same shape as the flat plate 4 in the main body 2. And the planetary carrier 1 is comprised by brazing these main-body parts 2 and the flat body 3 and integrating them. That is, by bringing the end of the bridge portion 5 into contact with the flat plate 3 and brazing the portion, the main body 2 and the flat plate 3 are integrated to form the planetary carrier 1.
こうして構成されるプラネタリキャリア１は、焼結金属製であり、金属粉末を所定の型に入れて加圧圧縮することにより、上記の本体部２と平板体３との圧粉体を作り、その圧粉体を互いに組み付けて焼成するとともに、ロウ付けすることによりプラネタリキャリア１が製造される。
The planetary carrier 1 configured in this manner is made of sintered metal, and a metal powder is put into a predetermined mold and compressed by pressure to make a green compact of the main body 2 and the flat plate 3. The planetary carrier 1 is manufactured by assembling and firing the green compacts and brazing.
したがって、ブリッジ部５の先端面と、平板体３の一方の面のうち、ブリッジ部５が突き当てられる部分が、それぞれ接合面６，７になっている。そして、それぞれの接合面６，７には、ロウ材に密着して嵌合する凹部８，９が形成されている。図２は、その凹部８，９およびこれに嵌合しているロウ材１０を模式的に示す断面図であり、ここに示すロウ材１０は、線状のチップであり、各凹部８，９はその開口形状もしくは断面の形状が、その線状のロウ材１０の断面形状と同じ形状となるように形成された浅い穴である。ロウチップは、一般には、丸断面の線状に形成されているから、各凹部８，９はそれに合わせて丸穴となっている。なお、ロウ材１０の外径と凹部８，９の内径とを一致させて両者を密着嵌合させるように構成してもよいが、これに替えてロウ材１０と凹部８，９の内周面との間に、加熱されて消失するシート材１１を挟み込むことにより、両者を実質的に密着嵌合させてもよい。
Therefore, of the front end surface of the bridge portion 5 and the one surface of the flat plate 3, the portions to which the bridge portion 5 is abutted are the joining surfaces 6 and 7, respectively. Then, concave portions 8 and 9 are formed on the respective joint surfaces 6 and 7 so as to be closely attached to the brazing material. FIG. 2 is a cross-sectional view schematically showing the recesses 8 and 9 and the brazing material 10 fitted thereto, and the brazing material 10 shown here is a linear chip. Is a shallow hole formed so that its opening shape or cross-sectional shape is the same as the cross-sectional shape of the linear brazing material 10. Since the low chip is generally formed in a line shape with a round cross section, each of the recesses 8 and 9 has a round hole correspondingly. Note that the outer diameter of the brazing material 10 and the inner diameter of the recesses 8 and 9 may be matched to fit closely together, but instead, the inner periphery of the brazing material 10 and the recesses 8 and 9 may be configured. By sandwiching the sheet material 11 that is heated and disappears between the surfaces, the both may be substantially closely fitted.
上記の各凹部８，９は、本体部２と平板体３とを正規の位置に相対的に位置決めした状態で、それぞれの中心部が同一軸線上に一致するように形成されている。したがって、一方の凹部（例えば平板体３の凹部）９にロウ材１０を差し込んで保持させ、その凹部９から突出しているロウ材１０の端部に、他方の凹部（例えば本体部２の凹部）８を嵌合させると、本体部２と平板体３との相対位置がロウ材１０を介して決められる。
Each of the recesses 8 and 9 is formed such that the center portion thereof coincides with the same axis in a state where the main body 2 and the flat plate 3 are relatively positioned at regular positions. Therefore, the brazing material 10 is inserted and held in one concave portion (for example, the concave portion of the flat plate 3), and the other concave portion (for example, the concave portion of the main body portion 2) is disposed at the end of the brazing material 10 protruding from the concave portion 9. When 8 is fitted, the relative position between the main body 2 and the flat plate 3 is determined via the brazing material 10.
ここで、各凹部８，９の深さとロウ材１０の長さとの関係について説明すると、各凹部８，９の深さの合計よりロウ材１０の長さが長く設定されている。換言すると、前記平板体３の凹部９にロウ材１０を挿入させて保持させ、その状態で平板体３の接合面７から突出したロウ材１０の長さＬ１が、本体部２の凹部８の深さＬ２より長く設定されている。したがって、ロウ材１０を介して本体部２と平板体３とを相対的に位置決めした状態では、各接合面６，７の間に隙間Ｃが空くようになっている。この隙間Ｃは、各凹部８，９の深さの合計とロウ材１０の長さとの差、あるいは上述したロウ材１０の接合面７からの突出長さＬ１と他方の凹部８の深さＬ２との差であり、したがってこれらの寸法差を調整することにより、接合面６，７同士の間の隙間Ｃをロウ付けに適する間隔に調整することができる。
Here, the relationship between the depths of the recesses 8 and 9 and the length of the brazing material 10 will be described. The length of the brazing material 10 is set longer than the total depth of the recesses 8 and 9. In other words, the brazing material 10 is inserted and held in the concave portion 9 of the flat plate 3, and the length L 1 of the brazing material 10 protruding from the joining surface 7 of the flat plate 3 in this state is the length of the concave portion 8 of the main body 2. It is set longer than the depth L2. Therefore, in a state where the main body 2 and the flat plate 3 are relatively positioned via the brazing material 10, a gap C is formed between the joint surfaces 6 and 7. This gap C is the difference between the sum of the depths of the recesses 8 and 9 and the length of the brazing material 10, or the protruding length L 1 of the brazing material 10 from the joint surface 7 and the depth L 2 of the other recess 8. Therefore, by adjusting these dimensional differences, the gap C between the joint surfaces 6 and 7 can be adjusted to an interval suitable for brazing.
上述したロウ付け接合構造体であるプラネタリキャリア１の製造手順について説明する。ここで説明するプラネタリキャリア１は焼結金属製であるから、先ず、構成要素である本体部２と平板体３との圧粉体を製造する。これは、従来の粉末冶金の分野で一般的に行われている方法であってよく、それぞれに対応して用意してある成形型に金属粉末を充填し、かつ加圧して行う。こうして得られた本体部用の圧粉体と平板体用の圧粉体とを組み付ける。その場合、前述した図２に示すように、それぞれの圧粉体に形成されている凹部８，９にロウ材１０を密着させて嵌合させる。こうすることにより本体部２と平板体３とが、すなわちそれぞれの圧粉体が相互に位置決めされ、またロウ材１０を浸透させるための隙間Ｃが確保される。
The manufacturing procedure of the planetary carrier 1 that is the above-described brazed joint structure will be described. Since the planetary carrier 1 described here is made of sintered metal, first, green compacts of the main body 2 and the flat plate 3 which are constituent elements are manufactured. This may be a method generally performed in the field of conventional powder metallurgy, and is performed by filling metal powder into a mold prepared corresponding to each and pressing. The green compact for the main body and the green compact for the flat plate thus obtained are assembled. In that case, as shown in FIG. 2 described above, the brazing material 10 is brought into close contact with the recesses 8 and 9 formed in the respective green compacts. By doing so, the main body 2 and the flat plate 3, that is, the respective green compacts are positioned with respect to each other, and a gap C for allowing the brazing material 10 to permeate is secured.
ロウ材１０を介して相対的な位置を決めて組み付けられた各圧粉体を焼結炉（図示せず）に入れて加熱する。焼結温度に対してロウ材１０の融点が低いから、焼成に伴ってロウ材１０が溶融し、溶けたロウ材１０が接合面６，７同士の間の隙間Ｃに流れ込んで拡がる。その場合、接合面６，７の間にはロウ材１０が介在しているだけであって、溶融したロウ材１０の流動を阻害するものが存在しないので、接合面６，７の全体に溶融したロウ材１０が拡がる。その結果、ロウ材１０の回り込みの不良などを生じることなく、各圧粉体すなわち本体部２と平板体３とを確実にロウ付けすることができる。ひいては、強度や耐久性に優れたプラネタリキャリア１を得ることができる。したがって、上記のようにして構成されたプラネタリキャリア１を、その一方の側面をハウジング（図示せず）などに固定していわゆる片持ち状態で使用しても、強度が不十分になったり、早期に亀裂が生じるなどの事態を未然に回避することができる。
The green compacts that have been assembled with their relative positions determined via the brazing material 10 are placed in a sintering furnace (not shown) and heated. Since the melting point of the brazing material 10 is lower than the sintering temperature, the brazing material 10 melts with firing, and the melted brazing material 10 flows into the gap C between the joining surfaces 6 and 7 and spreads. In this case, only the brazing material 10 is interposed between the joining surfaces 6 and 7, and there is nothing that hinders the flow of the molten brazing material 10, so the entire joining surfaces 6 and 7 are melted. The brazing material 10 spread out. As a result, each green compact, that is, the main body portion 2 and the flat plate body 3 can be brazed reliably without causing a wraparound failure of the brazing material 10. As a result, the planetary carrier 1 excellent in strength and durability can be obtained. Therefore, even if the planetary carrier 1 configured as described above is used in a so-called cantilever state with one side surface fixed to a housing (not shown) or the like, the strength becomes insufficient or early. It is possible to avoid a situation such as a crack in the case.
なお、上述した具体例では、ピニオンギヤを回転自在に支持するピニオンピンやこれをプラネタリキャリアに嵌合させる貫通孔は省略してある。また、この発明は上述した具体例に限定されない。すなわち、この発明においては、ロウ材によって二つの部材を位置決めできればよいので、ロウ材に密着して嵌合する一方の凹部は、貫通孔として構成してもよい。したがって、前述した凹部８，９のいずれか一方がこの発明のロウ材保持部に相当し、他方がこの発明の嵌合部に相当することになる。また、この発明における構造体は、プラネタリキャリア以外の金属製品であってもよい。
In the above-described specific example, the pinion pin that rotatably supports the pinion gear and the through-hole through which the pinion gear is fitted to the planetary carrier are omitted. Further, the present invention is not limited to the specific examples described above. That is, in the present invention, it is only necessary that the two members can be positioned by the brazing material, so that one of the recesses that are in close contact with the brazing material may be configured as a through hole. Therefore, one of the concave portions 8 and 9 described above corresponds to the brazing material holding portion of the present invention, and the other corresponds to the fitting portion of the present invention. Further, the structure in the present invention may be a metal product other than the planetary carrier.
Claims (5)
- 相対的に位置決めされた二つの部材の間に、ロウ材が溶融されて浸透することにより、これら二つの部材が接合されたロウ付け接合構造体において、
前記二つの部材のそれぞれが互いに対向する接合面を有し、
いずれか一方の部材にその接合面から突出した状態にロウ材を保持するロウ材保持部が形成され、かつ
他方の部材に、前記接合面から突出している前記ロウ材の端部側に密着して嵌合することにより、前記ロウ材を介して前記一方の部材に対する相対的な位置を決める嵌合部が形成されている
ことを特徴とするロウ付け接合構造体。 In the brazed joint structure in which the two members are joined by melting and infiltrating the brazing material between the two members positioned relatively,
Each of the two members has a joint surface facing each other,
One member is formed with a brazing material holding portion that holds the brazing material in a state of projecting from the joint surface, and the other member is in close contact with the end portion side of the brazing material projecting from the joint surface. And a fitting portion for determining a relative position with respect to the one member via the brazing material. - 前記他方の部材に形成されている前記嵌合部は、前記ロウ材の端部を突き当てる端面を有する凹部を含み、
その凹部の深さが、前記ロウ材の前記接合面から突出する長さより浅い
ことを特徴とする請求項１に記載のロウ付け接合構造体。 The fitting portion formed on the other member includes a recess having an end surface that abuts an end portion of the brazing material,
2. The brazed joint structure according to claim 1, wherein a depth of the concave portion is shallower than a length protruding from the joint surface of the brazing material. - 前記二つの部材は、前記ロウ材保持部に保持されかつ前記凹部に嵌合された前記ロウ材によって、それぞれの接合面の間に所定の隙間が空けられた状態に保持され、かつその隙間に溶融されたロウ材が浸透させられて接合されていることを特徴とする請求項２に記載のロウ付け接合構造体。 The two members are held by the brazing material held in the brazing material holding portion and fitted in the recess, and are held in a state where a predetermined gap is left between the respective joint surfaces, and the gap is held in the gap. The brazed joint structure according to claim 2, wherein the molten brazing material is infiltrated and joined.
- 前記二つの部材は、金属粉末を圧縮成形しかつ焼結した焼結金属から形成されていることを特徴とする請求項１ないし３のいずれかに記載のロウ付け接合構造体。 4. The brazed joint structure according to claim 1, wherein the two members are formed of a sintered metal obtained by compression-molding and sintering a metal powder.
- 前記一方の部材は、環状平板部の一方の面に複数のブリッジ部が突出させられて形成されたプラネタリキャリア用本体部を含み、
前記他方の部材は、前記ブリッジ部の先端に接合されたプラネタリキャリア用平板体を含む
ことを特徴とする請求項１ないし４のいずれかに記載のロウ付け接合構造体。 The one member includes a planetary carrier main body portion formed by projecting a plurality of bridge portions on one surface of the annular flat plate portion,
5. The brazed joint structure according to claim 1, wherein the other member includes a planetary carrier flat plate joined to a tip of the bridge portion. 6.
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|---|---|---|---|
| PCT/JP2009/055033 WO2010106616A1 (en) | 2009-03-16 | 2009-03-16 | Soldered joint structure |
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| PCT/JP2009/055033 WO2010106616A1 (en) | 2009-03-16 | 2009-03-16 | Soldered joint structure |
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Cited By (1)
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| US20180073535A1 (en) * | 2015-03-30 | 2018-03-15 | Sumitomo Electric Sintered Alloy, Ltd. | Joined component and method for manufacturing joined component |
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| JP2006320929A (en) * | 2005-05-18 | 2006-11-30 | Nippon Light Metal Co Ltd | Brazing method, brazing filler metal, and method for producing brazing filler metal |
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| JPH04356396A (en) * | 1991-05-31 | 1992-12-10 | Showa Alum Corp | Brazing method for metallic stock |
| JP2003251458A (en) * | 2002-02-27 | 2003-09-09 | Mitsubishi Materials Corp | Brazed and soldered sintered compact |
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| US20180073535A1 (en) * | 2015-03-30 | 2018-03-15 | Sumitomo Electric Sintered Alloy, Ltd. | Joined component and method for manufacturing joined component |
| US10788069B2 (en) * | 2015-03-30 | 2020-09-29 | Sumitomo Electric Sintered Alloy, Ltd. | Joined component and method for manufacturing joined component |
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