JP7376332B2 - How to join dissimilar metal parts - Google Patents

How to join dissimilar metal parts Download PDF

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JP7376332B2
JP7376332B2 JP2019217313A JP2019217313A JP7376332B2 JP 7376332 B2 JP7376332 B2 JP 7376332B2 JP 2019217313 A JP2019217313 A JP 2019217313A JP 2019217313 A JP2019217313 A JP 2019217313A JP 7376332 B2 JP7376332 B2 JP 7376332B2
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metal member
members
joining
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convex portion
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JP2021084132A (en
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浩二 山本
政和 手島
聡 白波瀬
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Nitto Seiko Co Ltd
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Description

本発明は、機械的接合による異種金属部材の接合方法に関する。 The present invention relates to a method for joining dissimilar metal members by mechanical joining.

従来から、異種金属同士を接合した中空構造を有するシャフトとしては、特許文献１に示すものがある。この異種金属接合シャフトは、機械的接合により接合されるものであって、中空構造を有する第１シャフトの内部に第２シャフトを圧入することにより両部材を接合する。 Conventionally, as a shaft having a hollow structure in which dissimilar metals are joined together, there is one shown in Patent Document 1. This dissimilar metal joining shaft is joined by mechanical joining, and the two members are joined by press-fitting the second shaft into the inside of the first shaft having a hollow structure.

特開２０１７－３２１３１号公報JP 2017-32131 Publication

しかしながら、上記接合方法は、第１シャフトの内周面と第２シャフトの外周面が、軸方向で重複部分を有する構造となるため、シャフトの肉厚が薄いもの同士は接合できない問題を有していた。 However, the above joining method has a structure in which the inner circumferential surface of the first shaft and the outer circumferential surface of the second shaft overlap in the axial direction, so there is a problem that thin shafts cannot be joined together. was.

本発明は、上記問題に鑑みて創成されたものであり、異種金属部材の機械的接合において接合強度に優れた異種金属部材の接合方法を提供することを目的とする。 The present invention was created in view of the above problems, and an object of the present invention is to provide a method for joining dissimilar metal members with excellent joint strength in mechanically joining dissimilar metal members.

上記課題は、第１金属部材と第２金属部材とを接合する異種金属部材の接合方法において、第１金属部材は端面に凸部を有し、両部材の端面同士を突き合わせた状態で外周を拘束するように金型で保持するとともに、第１金属部材の凸部の外周面と金型の内周面との間には間隙を設け、この状態で両部材を圧縮する方向に加圧することにより、当該間隙には第２金属部材の端面が塑性変形により充填され、さらに加圧して第１金属部材の凸部の上端外周を外方へ扁平させることにより、当該第１金属部材の凸部と第２金属部材の端面とを係合させて両部材を接合する異種金属部材の接合方法によって解決できる。 The problem described above is that in a method for joining dissimilar metal members, in which a first metal member and a second metal member are joined, the first metal member has a convex portion on its end surface, and the outer periphery is While holding the first metal member in a mold so as to restrain it, a gap is provided between the outer peripheral surface of the convex portion of the first metal member and the inner peripheral surface of the mold, and in this state, pressure is applied in a direction to compress both members. As a result, the gap is filled with the end face of the second metal member through plastic deformation, and by further applying pressure to flatten the upper end outer periphery of the convex portion of the first metal member outward, the convex portion of the first metal member is This problem can be solved by a method of joining dissimilar metal members in which both members are joined by engaging the end face of the second metal member.

なお、第１金属部材は、中空構造の棒状部品であることが望ましい。 Note that the first metal member is preferably a rod-shaped component having a hollow structure.

本発明によれば、第１金属部材および第２金属部材が接合部に圧入代をとれない構造であっても、両部材を機械的接合により強固に接合することができる。 According to the present invention, even if the first metal member and the second metal member have a structure in which there is no press-fitting margin in the joint portion, both members can be firmly joined by mechanical joining.

本発明である異種金属部材の接合方法の第１工程を示す図である。FIG. 3 is a diagram showing the first step of the method for joining dissimilar metal members according to the present invention. 本発明である異種金属部材の接合方法の第２工程を示す図である。It is a figure which shows the 2nd process of the joining method of dissimilar metal members which is this invention. 本発明である異種金属部材の接合方法の第３工程を示す図である。It is a figure which shows the 3rd process of the joining method of dissimilar metal members which is this invention. 本発明である異種金属部材の接合方法の他の実施形態を示す図である。It is a figure showing other embodiments of the joining method of dissimilar metal members which is the present invention.

以下、本発明である異種金属部材の接合方法を実施するための形態を図面に基づいて説明する。図１において、１０は銅材料でなる第１金属部材、２０は鉄材でなる第２金属部材である。これら第１金属部材１０および第２金属部材２０は、予め別個に成形され準備されるものである。 DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments for carrying out the method of joining dissimilar metal members according to the present invention will be described based on the drawings. In FIG. 1, 10 is a first metal member made of copper material, and 20 is a second metal member made of iron material. These first metal member 10 and second metal member 20 are separately molded and prepared in advance.

第１金属部材１０は、一端に凸部１１を有する棒状部品であり、その中心線上には貫通孔１２が穿設されている。 The first metal member 10 is a rod-shaped component having a convex portion 11 at one end, and has a through hole 12 bored on its center line.

第２金属部材２０は、一端に袋穴２１を有する棒状部品であり、この袋穴の内径は、前記第１金属部材１０の貫通孔１２の内径と同一寸法に設定されている。 The second metal member 20 is a rod-shaped component having a blind hole 21 at one end, and the inner diameter of the blind hole is set to be the same size as the inner diameter of the through hole 12 of the first metal member 10.

これら第１金属部材１０および第２金属部材２０を接合する方法として、まずは、第１工程として、図１に示すように、第１金属部材１０において凸部１１を有する側の端面と、第２金属部材２０において袋穴２１を有する側の端面とを突き合わせた状態で、両部材１０，２０の外周を拘束するように金型１の挿入孔１a内に保持する。このとき、両部材１０，２０の外周面と金型１の挿入孔１aの内周面とは若干のクリアランスを設けるとともに、第１金属部材１０の凸部１１の外周面と金型１の挿入孔１aの内周面との間には当該クリアランスよりも大きな間隙が創出される。 As a method for joining these first metal member 10 and second metal member 20, first, as a first step, as shown in FIG. The metal member 20 is held in the insertion hole 1a of the mold 1 so that the outer circumferences of both members 10 and 20 are restrained, with the end faces of the metal member 20 on the side having the blind hole 21 abutted against each other. At this time, a slight clearance is provided between the outer peripheral surfaces of both members 10 and 20 and the inner peripheral surface of the insertion hole 1a of the mold 1, and the outer peripheral surface of the convex portion 11 of the first metal member 10 and the insertion hole 1a of the mold 1 are provided. A gap larger than the clearance is created between the hole 1a and the inner circumferential surface of the hole 1a.

また、第１金属部材１０の貫通孔１２および第２金属部材の袋穴１２には、下方からノックアウトピン２が挿入されている。さらに、第１金属部材１０の他端は、スリーブピン３によって支持されており、このスリーブピン３の内径は第１金属部材１０の内径と同一寸法に設定されている。 Further, the knockout pin 2 is inserted from below into the through hole 12 of the first metal member 10 and the blind hole 12 of the second metal member. Further, the other end of the first metal member 10 is supported by a sleeve pin 3, and the inner diameter of the sleeve pin 3 is set to be the same as the inner diameter of the first metal member 10.

続いて、第２工程として、図２に示すように、金型１の上方から挿入孔１aにプレスピン４を挿入し、第２金属部材２０の他端を加圧することにより、両部材１０，２０を軸方向に圧縮する。これにより、第１金属部材１０の凸部１１の外周面と金型１の挿入孔１aの内周面との間隙には第２金属部材２０の一端が塑性変形により充填される。 Subsequently, as a second step, as shown in FIG. 2, by inserting the press pin 4 into the insertion hole 1a from above the mold 1 and pressurizing the other end of the second metal member 20, both members 10, 20 is compressed in the axial direction. As a result, the gap between the outer peripheral surface of the convex portion 11 of the first metal member 10 and the inner peripheral surface of the insertion hole 1a of the mold 1 is filled with one end of the second metal member 20 by plastic deformation.

第３工程として、図３に示すように、さらに加圧することにより、第１金属部材１０の凸部１１の上端外周を外方へ扁平させてアンダーカット部１３を成形することにより、当該第１金属部材１０と第２金属部材２０とを軸方向へ係合させて両部材１０，２０を強固に接合する。 As a third step, as shown in FIG. 3, by further applying pressure, the upper end outer periphery of the convex portion 11 of the first metal member 10 is flattened outward to form an undercut portion 13. The metal member 10 and the second metal member 20 are engaged in the axial direction to firmly join the two members 10 and 20.

なお、第１金属部材１０の貫通孔１２の開口縁および第２金属部材２０の袋穴２１の開口縁には、それぞれ内面取り部１２a,２１aを設けることが好ましい。これら内面取り部１２a,２１aを設けることによって、第１金属部材１０の凸部１１の上端外周を外方へ扁平し易くなる。 Note that it is preferable to provide internal chamfers 12a and 21a at the opening edge of the through hole 12 of the first metal member 10 and the opening edge of the blind hole 21 of the second metal member 20, respectively. By providing these inner chamfered portions 12a, 21a, it becomes easier to flatten the upper end outer periphery of the convex portion 11 of the first metal member 10 outward.

最後に、ノックアウトピン２およびスリーブピン３を上方へ前進させることにより、第１金属部材１０と第２金属部材２０の接合体が金型１から排出される。 Finally, by advancing the knockout pin 2 and sleeve pin 3 upward, the joined body of the first metal member 10 and the second metal member 20 is ejected from the mold 1.

なお、図４に示すように、他の実施形態として、第２金属部材２０の上部は金型１で保持せずに外周を開放した状態で、第２金属部材２０の他端を加圧することにより、当該他端を外方へ扁平させて頭部２００を成形することも可能である。 In addition, as shown in FIG. 4, as another embodiment, the upper part of the second metal member 20 is not held by the mold 1 and the outer periphery is open, and the other end of the second metal member 20 is pressurized. Accordingly, it is also possible to form the head 200 by flattening the other end outward.

なお、第１金属部材１０および第２金属部材２０は、中空構造でなく、中実構造であってもよい。これ以外にも、本発明は上記の実施形態に限定されることなく、本発明の趣旨を逸脱しない範囲で種々の変形が可能である。 Note that the first metal member 10 and the second metal member 20 may have a solid structure instead of a hollow structure. In addition to this, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.

１ 金型
１ａ 挿入孔
２ ノックアウトピン
３ スリーブピン
４ プレスピン
１０ 第１金属部材
１１ 凸部
１２ 貫通孔
１２a 内面取り部
１３ アンダーカット部
２０ 第２金属部材
２１ 袋穴
２１a 内面取り部
２００ 頭部
1 Mold 1a Insertion hole 2 Knockout pin 3 Sleeve pin 4 Press pin 10 First metal member 11 Convex portion 12 Through hole 12a Internal chamfer 13 Undercut portion 20 Second metal member 21 Blind hole 21a Internal chamfer 200 Head

Claims (1)

第１金属部材と第２金属部材とを接合する異種金属部材の接合方法において、
第１金属部材は、中空構造の棒状部品であって、端面に凸部を有し、両部材の端面同士を突き合わせた状態で外周を拘束するように金型で保持するとともに、第１金属部材の凸部の外周面と金型との間には間隙を設け、
この状態で両部材を圧縮する方向に加圧することにより、当該間隙には第２金属部材の端面が塑性変形により充填され、
さらに加圧して第１金属部材の凸部の上端外周を外方へ扁平させることにより、当該第１金属部材の凸部と第２金属部材の端面とを係合させて両部材を接合すること、
を特徴とする異種金属部材の接合方法。 In a method for joining dissimilar metal members for joining a first metal member and a second metal member,
The first metal member is a rod-shaped part having a hollow structure, and has a convex portion on its end face, and is held in a mold so as to restrain the outer periphery with the end faces of both members abutted against each other. A gap is provided between the outer peripheral surface of the convex part and the mold,
By applying pressure in the direction of compressing both members in this state, the end face of the second metal member is filled into the gap by plastic deformation,
By further applying pressure to flatten the upper end outer periphery of the convex portion of the first metal member outward, the convex portion of the first metal member and the end surface of the second metal member are engaged with each other, thereby joining both members. ,
A method for joining dissimilar metal members, characterized by:
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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009269035A (en) 2008-04-30 2009-11-19 Kosei Aluminum Co Ltd Friction pressure welding method

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5870989A (en) * 1981-10-22 1983-04-27 Nissan Motor Co Ltd Joining of different kind members
JPH0647178B2 (en) * 1987-09-30 1994-06-22 神奈川県 Cold welding method for metal tubes

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009269035A (en) 2008-04-30 2009-11-19 Kosei Aluminum Co Ltd Friction pressure welding method

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