JP5115719B2 - Friction stir welding method and sealed container - Google Patents
Friction stir welding method and sealed container Download PDFInfo
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Description
本発明は、摩擦攪拌接合方法および密閉容器に関するもので、特に、容器本体の開口部に蓋体を全周に亘って摩擦攪拌接合する方法およびこの方法によって得られる密閉容器に関する。 The present invention relates to a friction stir welding method and a closed container, and more particularly to a method for friction stir welding a cover body to the opening of a container body over the entire circumference and a closed container obtained by this method.
従来、自動車に使用されているオイルリザーバ等のアルミニウム合金製の密閉容器においては、容器本体（本体）の開口部と蓋体との合せ部を全周に亘って摩擦攪拌接合することが行われている（例えば、特許文献１参照）。ところで、摩擦攪拌接合においては、回転ツールに、例えば、3°の前進角を持たせ、この回転ツールのショルダ部を、部材表面よりも押込んだ状態、例えば、0.1 〜 0.5 mmだけ押込んだ状態で、開口部と蓋体との合せ部に沿って回転ツールを送る。このため、摩擦攪拌接合における接合部は、部材表面に対して、例えば、0.2 mm程度凹む。 2. Description of the Related Art Conventionally, in an aluminum alloy sealed container such as an oil reservoir used in an automobile, the joint portion between the opening of the container body (main body) and the lid is friction stir welded over the entire circumference. (For example, refer to Patent Document 1). By the way, in friction stir welding, the rotary tool has a forward angle of 3 °, for example, and the shoulder portion of the rotary tool is pushed in from the member surface, for example, 0.1 to 0.5 mm. In the state, the rotating tool is sent along the mating portion of the opening and the lid. For this reason, the joint part in friction stir welding is recessed about 0.2 mm with respect to the member surface, for example.
したがって、容器本体の開口部と蓋体とを全周に亘って摩擦攪拌接合する場合、接合始端と接合終端とでオーバーラップさせる部分（以下、オーバーラップ部という）が、少なくとも１箇所必要である。このオーバーラップ部においては、接合始端、すなわち、部材表面に対して凹んだ部分に、摩擦攪拌接合開始時の押込み量を維持した回転ツールが進入する。これにより、オーバラップ部における回転ツールの押込み量が接合始端の凹み分だけ不足し、オーバーラップ部に穴あきが発生するおそれがある。
そこで本発明は、上記事情に鑑みてなされたもので、接合始端と接合終端とのオーバーラップ部における穴あきを防止した摩擦攪拌接合方法を提供することを課題としてなされたものである。
また、本発明は、接合始端と接合終端とのオーバーラップ部における穴あきを防止した密閉容器を提供することを課題としてなされたものである。
Therefore, the present invention has been made in view of the above circumstances, and an object of the present invention is to provide a friction stir welding method that prevents perforation in an overlap portion between a joining start end and a joining end.
Another object of the present invention is to provide a sealed container that prevents perforation at the overlap portion between the joining start end and the joining end.
上記課題を解決するために、本発明の摩擦攪拌接合方法は、本体に形成された開口部と該開口部を閉塞させる蓋体との合せ部を全周に亘って摩擦攪拌接合する方法であって、回転ツールを第１押込み量で前記合せ部に沿って移動させ、接合始端よりも、少なくとも、前記回転ツールの外径の１／２の距離だけ手前の位置で、前記回転ツールの押込み量を、前記接合始端の凹みによる前記回転ツールの押込み量の不足分だけ押込み量を増加させた第２押込み量に増加させ、該第２押込み量を維持しつつ、前記接合始端と接合終端とをオーバーラップさせることを特徴とする。 In order to solve the above problems, the friction stir welding method of the present invention is a method of friction stir welding over the entire circumference of the joint portion of the opening formed in the main body and the lid that closes the opening. Then, the rotary tool is moved along the mating portion by the first push amount, and the push amount of the rotary tool is at least a half distance of the outer diameter of the rotary tool from the joining start end. Is increased to a second pushing amount obtained by increasing the pushing amount by an insufficiency of the pushing amount of the rotary tool due to the depression of the joining start end, and the joining start end and the joining end are maintained while maintaining the second pushing amount. It is made to overlap.
上記課題を解決するために、本発明の密閉容器は、本体に形成された開口部と該開口部を閉塞させる蓋体との合せ部が全周に亘って摩擦攪拌接合される密閉容器であって、前記開口部と前記蓋体との接合部に、接合始端と接合終端とをオーバーラップさせて形成されるオーバーラップ部を設け、該オーバーラップ部は、前記接合始端よりも、少なくとも、回転ツールの外径の１／２の距離だけ手前の位置で、前記回転ツールの押込み量が前記接合始端の凹みによる前記回転ツールの押込み量の不足分だけ増加されて形成されることを特徴とする。 In order to solve the above-mentioned problems, the sealed container of the present invention is a sealed container in which the joint portion of the opening formed in the main body and the lid that closes the opening is friction stir welded over the entire circumference. An overlap portion formed by overlapping a joining start end and a joining end is provided at a joint portion between the opening and the lid, and the overlap portion rotates at least more than the joining start end. It is characterized in that the pushing amount of the rotating tool is increased by a shortage of the pushing amount of the rotating tool due to the depression of the joining start end at a position before the distance of ½ of the outer diameter of the tool. .
（発明の態様）
以下に、本願において特許請求が可能と認識されている発明（以下、請求可能発明と称する）の態様を例示し、例示された各態様について説明する。ここでは、各態様を、特許請求の範囲と同様に、項に区分すると共に各項に番号を付し、必要に応じて他の項の記載を引用する形式で記載する。これは、請求可能発明の理解を容易にするためであり、請求可能発明を構成する構成要素の組み合わせを、以下の各項に記載されたものに限定する趣旨ではない。つまり、請求可能発明は、各項に付随する記載、実施形態の記載等を参酌して解釈されるべきであり、その解釈に従う限りにおいて、各項の態様にさらに他の構成要素を付加した態様も、また、各項の態様から構成要素を削除した態様も、請求可能発明の一態様となり得る。
なお、以下の各項において、（１）〜（４）項の各々が、請求項１〜４の各々に相当する。
(Aspect of the Invention)
In the following, aspects of the invention that is recognized as being capable of being claimed in the present application (hereinafter referred to as claimable invention) will be exemplified, and each exemplified aspect will be described. Here, as in the claims, each aspect is divided into paragraphs, numbers are assigned to the respective paragraphs, and the descriptions of other paragraphs are cited as necessary. This is for the purpose of facilitating the understanding of the claimable invention, and is not intended to limit the combination of the constituent elements constituting the claimable invention to those described in the following sections. In other words, the claimable invention should be construed in consideration of the description accompanying each section, the description of the embodiment, etc., and as long as the interpretation is followed, another aspect is added to the aspect of each section. Moreover, the aspect which deleted the component from the aspect of each term can also be one aspect of the claimable invention.
In the following items, each of the items (1) to ( 4 ) corresponds to each of claims 1 to 4 .
（１）本体に形成された開口部と該開口部を閉塞させる蓋体との合せ部を全周に亘って摩擦攪拌接合する方法であって、回転ツールを第１押込み量で合せ部に沿って移動させ、接合始端よりも、少なくとも、回転ツールの外径の１／２の距離だけ手前の位置で、回転ツールの押込み量を、接合始端の凹みによる回転ツールの押込み量の不足分だけ押込み量を増加させた第２押込み量に増加させ、該第２押込み量を維持しつつ、接合始端と接合終端とをオーバーラップさせる摩擦攪拌接合方法。
摩擦攪拌接合においては、回転ツールを所定の前進角（例えば、3°）で傾斜させ、この傾斜させた回転ツールのショルダ部によって、軟化させた材料を押込みながら、回転ツールを開口部と蓋体との合せ部に沿って移動させる。これにより、摩擦攪拌接合によって形成された接合部は、部材表面に対して凹む（例えば、0.2 mm）。したがって、摩擦攪拌接合開始時の回転ツールの押込み量を維持したままの状態で、接合始端と接合終端とをオーバーラップさせると、接合始端が部材表面に対して凹んでいることから、その凹み分だけ回転ツールの押込み量が不足する。これにより、接合始端と接合終端とのオーバーラップ部に穴あきが発生するおそれがある。
本項に記載の摩擦攪拌接合方法によれば、接合始端よりも、少なくとも、回転ツールの外径の１／２の距離だけ手前の位置で、回転ツールの押込み量を増加させるので、前述したような、接合始端と接合終端とのオーバーラップ部の回転ツールの押込み量の不足が解消され、全周に亘って穴あきのない均一な接合部を得ることができる。
本項の態様において、回転ツールの押込み量を増加させる位置は、回転ツールの外径の１／２の距離よりも手前であればよく、例えば、回転ツールの外径と同一の距離だけ手前の位置で、回転ツールの押込み量を増加させてもよい。
(1) A method of friction stir welding of a mating portion of an opening formed in a main body and a lid that closes the opening over the entire circumference, and a rotating tool along a mating portion with a first push amount At a position that is at least a half the outer diameter of the rotating tool from the welding start end, push the rotating tool push amount by the shortage of the rotation tool push amount due to the recess at the welding start end. the amount is increased to a second pressing amount with increased, while maintaining the second pushing amount, the friction stir welding method to overlap joint beginning and the junction termination.
In friction stir welding, the rotary tool is inclined at a predetermined advancing angle (for example, 3 °), and the rotary tool is pushed in by the shoulder portion of the inclined rotary tool while the rotary tool is pushed into the opening and the lid. Move along the mating part. Thereby, the joint part formed by friction stir welding is recessed with respect to the member surface (for example, 0.2 mm). Therefore, if the joining start end and the joining end overlap each other while maintaining the pushing amount of the rotary tool at the start of friction stir welding, the joining start end is recessed with respect to the member surface. Only the amount of push of the rotary tool is insufficient. As a result, there is a possibility that a hole is generated in the overlap portion between the joining start end and the joining end.
According to the friction stir welding method described in this section, the pushing amount of the rotary tool is increased at a position that is at least a half of the outer diameter of the rotary tool from the welding start end. In addition, the shortage of the pushing amount of the rotating tool at the overlapping portion between the joining start end and the joining end is eliminated, and a uniform joining portion without a hole can be obtained over the entire circumference.
In the aspect of this section, the position where the pushing amount of the rotary tool is increased only needs to be in front of a distance that is ½ of the outer diameter of the rotary tool. The push amount of the rotary tool may be increased at the position.
（２）第１押込み量および第２押込み量は、予め決められた押込み量の範囲内に設定され、第２押込み量は、第１押込み量の２倍に設定される（１）の摩擦攪拌接合方法。
本項に記載の摩擦攪拌接合方法によれば、接合始端よりも、少なくとも、回転ツールの外径の１／２の距離だけ手前の位置で、回転ツールの押込み量を２倍にする。これにより、接合始端と接合終端とのオーバーラップ部の回転ツールの押込み量の不足が解消される。さらに、本項の態様では、第１押込み量および第２押込み量を予め決められた押込み量の範囲内に設定したことにより、全周に亘って穴あきのない接合部を得ることができる。
本項の態様において、予め決められた押込み量とは、接合部に穴あきが発生する領域と、接合部にバリが発生する領域と、の間の領域（範囲）の押込み量をいう。
(2) the first pressing amount and the second push-in amount is set within a range of a predetermined pushing amount, the second pushing amount, the friction agitation is set to twice the first pressing amount (1) Joining method.
According to the friction stir welding method described in this section, the pushing amount of the rotary tool is doubled at a position that is at least a distance half the outer diameter of the rotary tool from the welding start end. Thereby, the shortage of the pushing amount of the rotary tool in the overlapping portion between the joining start end and the joining end is solved. Furthermore, in the aspect of this section, the first pushing amount and the second pushing amount are set within a predetermined pushing amount range, so that a joined portion having no hole can be obtained over the entire circumference.
In the present mode, the predetermined pushing amount means an area where perforated occurs in the junction, the area where the burr is generated in the junction, the pushing amount of area (range) between.
（３）本体に形成された開口部と該開口部を閉塞させる蓋体との合せ部が全周に亘って摩擦攪拌接合される密閉容器であって、開口部と蓋体との接合部に、接合始端と接合終端とをオーバーラップさせて形成されるオーバーラップ部を設け、該オーバーラップ部は、接合始端よりも、少なくとも、回転ツールの外径の１／２の距離だけ手前の位置で、回転ツールの押込み量が接合始端の凹みによる回転ツールの押込み量の不足分だけ増加されて形成される密閉容器。
本項に記載の密閉容器によれば、オーバラップ部は、接合始端よりも、少なくとも、回転ツールの外径の１／２の距離だけ手前の位置で、回転ツールの押込み量を増加させることで形成されるので、接合始端と接合終端とのオーバーラップ部の回転ツールの押込み量の不足が解消され、開口部と蓋体との合せ部の全周に亘って穴あきのない均一な接合部を得ることができる。これにより、密閉容器の密閉度ひいては品質を確保することができる。
本項の態様において、密閉容器は、例えば、アルミニウム合金からなるオイルリザーバである。
( 3 ) A hermetically sealed container in which a joint portion of an opening formed in the main body and a lid that closes the opening is friction stir welded over the entire circumference, and the joint between the opening and the lid An overlap portion formed by overlapping the joining start end and the joining end is provided, and the overlap portion is at least a distance half the outer diameter of the rotary tool from the joining start end. A sealed container formed by increasing the pushing amount of the rotating tool by an amount corresponding to the insufficiency of the pushing amount of the rotating tool due to the depression at the joining start end .
According to the sealed container described in this section, the overlap portion increases the pushing amount of the rotary tool at a position at least a half distance of the outer diameter of the rotary tool from the joining start end. As a result, the shortage of the push amount of the rotating tool at the overlapping part between the joining start end and joining end is eliminated, and a uniform joined part without perforation is formed over the entire circumference of the joint part between the opening and the lid. Obtainable. Thereby, the sealing degree of the sealed container and thus the quality can be ensured.
In the embodiment of this section, the sealed container is an oil reservoir made of, for example, an aluminum alloy.
（４）オーバーラップ部は、予め決められた押込み量の範囲内で、回転ツールの押込み量が２倍に増加されて形成される（３）の密閉容器。
本項に記載の密閉容器によれば、接合始端よりも、少なくとも、回転ツールの外径の１／２の距離だけ手前の位置で、回転ツールの押込み量Pを、摩擦攪拌接合開始時の押込み量P0に対して２倍の押込み量P1に増加させることで、接合始端と接合終端とのオーバーラップ部を形成する。そして、本項の態様では、押込み量Pを増加させる前後の各押込み量P0、P1を予め決められた押込み量の範囲内に設定した。これにより、開口部と蓋体との合せ部に、全周に亘って穴あきのない接合部を得ることができ、密閉容器の密閉度ひいては品質を確保することができる。
( 4 ) The airtight container according to (3) , wherein the overlap portion is formed by increasing the pushing amount of the rotary tool by a factor of 2 within a predetermined pushing amount range.
According to the sealed container described in this section, the pushing amount P of the rotating tool is pushed at the start of the friction stir welding at a position at least half the outer diameter of the rotating tool from the joining start end. By increasing the pushing amount P1 to twice the amount P0, an overlap portion between the joining start end and the joining end is formed. In the aspect of this section, the push amounts P0 and P1 before and after the push amount P is increased are set within a predetermined push amount range. Thereby, the joint part which does not have a hole can be obtained in the joint part of an opening part and a cover body over a perimeter, and the sealing degree as a result and quality can be ensured.
接合始端と接合終端とのオーバーラップ部における穴あきを防止した摩擦攪拌接合方法および密閉容器を提供することができる。 It is possible to provide a friction stir welding method and a hermetically sealed container that prevent perforation at an overlap portion between a joining start end and a joining end.
本発明の一実施形態を図１〜図６に基いて説明する。なお、本実施形態では、アルミニウム合金からなる容器本体２（本体）の開口部３（以下、単に開口部３という）と蓋体４との合せ部５を全周に亘って摩擦攪拌接合する方法およびこれにより得られる密閉容器１を説明する。 An embodiment of the present invention will be described with reference to FIGS. In the present embodiment, the friction stir welding is performed over the entire circumference of the joint 5 between the opening 3 (hereinafter simply referred to as the opening 3) of the container body 2 (main body) made of an aluminum alloy and the lid 4. And the airtight container 1 obtained by this is demonstrated.
図１および図２に示されるように、本実施形態の密閉容器１は、容器本体２の開口部３と蓋体４との接合部６に、接合始端７と接合終端８とをオーバーラップさせて形成されるオーバーラップ部９を有する。そして、本実施形態の密閉容器１では、このオーバラップ部９を、接合始端７よりも、少なくとも、回転ツール１０の外径の１／２の距離だけ手前の位置で、回転ツール１０の押込み量P（図３参照）を摩擦攪拌接合開始時における第１押込み量P0から第２押込み量P1へ２倍に増加させて形成した（P1＝2P0）。これにより、オーバーラップ部９における第２押込み量P1と、他の部分（オーバーラップさせていない部分）の第１押込み量P0とが同一になり、このようにして形成された密閉容器１においては、開口部３と蓋体４との合せ部５に、全周に亘って穴あきのない均一な接合部６を得ることができる。 As shown in FIG. 1 and FIG. 2, the sealed container 1 of the present embodiment has the joining start end 7 and the joining end 8 overlap the joining portion 6 between the opening 3 of the container body 2 and the lid body 4. The overlap portion 9 is formed. And in the airtight container 1 of this embodiment, this overlap part 9 is the amount of pushing of the rotary tool 10 at a position before the joining start end 7 by at least a half distance of the outer diameter of the rotary tool 10. P (see FIG. 3) was formed by increasing twice from the first pushing amount P0 to the second pushing amount P1 at the start of friction stir welding (P1 = 2P0). Accordingly, the second push-in amount P1 in the overlap portion 9 becomes a first pressing amount P0 of the other portion (portion not overlapped) are the same, the closed container 1 formed in this manner In addition, a uniform joint 6 having no perforations can be obtained in the joint portion 5 between the opening 3 and the lid body 4 over the entire circumference.
次に、本実施形態の摩擦攪拌接合方法を詳細に説明する。
なお、本実施形態における摩擦攪拌接合の接合条件は以下に示すとおりである。
（１）容器本体２（本体）の開口部３周縁の板厚：5 mm
（２）蓋体４の板厚：2 mm
（３）回転ツール１０の外径：7 mm
（４）回転ツール１０のプローブ（先端部）の外径：3.5 mm
（５）回転ツール１０のプローブ（先端部）の長さ：2 mm
（６）回転ツール１０の回転数：1500 r.p.m
（７）回転ツール１０の送り速度：0.75 m/min
（８）回転ツール１０の前進角θ（図３参照）：3°
（９）摩擦攪拌接合開始時の回転ツール１０の部材表面に対する押込み量P0（第１押込み量）：0.2 mm
（１０）増加後の回転ツール１０の部材表面に対する押込み量P1（第２押込み量、P1＝2P0）：0.4 mm
Next, the friction stir welding method of this embodiment will be described in detail.
In addition, the joining conditions of friction stir welding in this embodiment are as shown below.
(1) Thickness of the periphery of the opening 3 of the container body 2 (main body): 5 mm
(2) Lid 4 thickness: 2 mm
(3) Outer diameter of rotating tool 10: 7 mm
(4) Outer diameter of probe (tip) of rotating tool 10: 3.5 mm
(5) Probe (tip) length of the rotary tool 10: 2 mm
(6) Number of rotations of rotating tool 10: 1500 rpm
(7) Feeding speed of rotating tool 10: 0.75 m / min
(8) Advance angle θ of rotating tool 10 (see FIG. 3): 3 °
(9) Pushing amount P0 (first pushing amount) against the member surface of the rotary tool 10 at the start of friction stir welding: 0.2 mm
(10) Pushing amount P1 (second pushing amount, P1 = 2P0) against the member surface of the rotating tool 10 after the increase: 0.4 mm
図１に示されるように、回転ツール１０を、容器本体２（本体）の開口部３と蓋体４との合せ部５上に設定された接合始端７から、合せ部５に沿って規定方向（本実施形態では、図１における時計回り方向）へ移動させる。これにより、回転ツール１０の軌跡には、接合部６（摩擦攪拌接合部）が形成される。ここで、図４に示されるように、接合部６は、合せ部５（部材表面）に対して、H（本実施形態では、0.2 mm）だけ凹む。 As shown in FIG. 1, the rotating tool 10 is moved in a specified direction along the mating portion 5 from the joining start end 7 set on the mating portion 5 of the opening 3 and the lid 4 of the container main body 2 (main body). (In this embodiment, it is moved in the clockwise direction in FIG. 1). As a result, the joint 6 (friction stir weld) is formed on the trajectory of the rotary tool 10. Here, as shown in FIG. 4, the joint portion 6 is recessed by H (in this embodiment, 0.2 mm) with respect to the mating portion 5 (member surface).
そして、本実施形態では、接合始端７よりも、少なくとも、回転ツール１０の外径の１／２の距離だけ手前の位置、例えば、接合始端７よりも5 mmだけ手前の位置で、回転ツール１０の押込み量P（図３参照）を、第１押込み量P0から第２押込み量P1へ２倍に増加させてオーバラップ部９を形成する。これにより、図５に示されるように、オーバーラップ部９における第２押込み量P1と他の部分（オーバーラップさせていない部分）の第１押込み量P0とを同一にさせる。言い換えると、本実施形態では、押込み量Pが不足する前、すなわち、回転ツール１０が接合始端７に到達する手前の位置で、押込み量Pを第１押込み量P0から第２押込み量P1（P1＝2P0）へ２倍に増加させる。 In this embodiment, the rotary tool 10 is located at a position that is at least a distance half the outer diameter of the rotary tool 10 from the joining start end 7, for example, a position that is 5 mm before the joining start end 7. The overlap amount 9 is formed by increasing the pushing amount P (see FIG. 3) by a factor of two from the first pushing amount P0 to the second pushing amount P1. Thus, as shown in FIG. 5, it is a first pressing amount P0 of the second pressing amount P1 and the other portions in the overlap portion 9 (a portion not overlapped) to the same. In other words, in this embodiment, before the push amount P is insufficient, that is, before the rotary tool 10 reaches the joining start end 7, the push amount P is changed from the first push amount P0 to the second push amount P1 (P1). = 2P0).
また、本実施形態では、図６に示されるように、第１押込み量P0および第２押込み量P1を予め決定された押込み量の範囲内に設定することで、合せ部５の全周に亘って穴あきのない接合部６を得ることができる。ここで、予め決められた押込み量とは、図６における回転ツール１０の押込み量Pが0.1 mmよりも小さい領域、すなわち、接合部６に穴あきが発生する領域と、図６における回転ツール１０の押込み量Pが0.5 mmよりも大きい領域、すなわち、接合部６にバリが発生する領域と、の間の領域（図６における押込み量の適正範囲）の押込み量Pをいう。 Further, in the present embodiment, as shown in FIG. 6, the first pushing amount P0 and the second pushing amount P1 are set within a predetermined pushing amount range, so that the entire circumference of the mating portion 5 can be obtained. As a result, it is possible to obtain the joint 6 without a hole. Here, the predetermined pressing amount is a region where the pressing amount P of the rotary tool 10 in FIG. 6 is smaller than 0.1 mm , that is, a region where a hole is generated in the joint 6, and the rotating tool 10 in FIG. 6. The pushing amount P in a region ( an appropriate range of the pushing amount in FIG. 6 ) between a region where the pushing amount P is larger than 0.5 mm , that is, a region where burrs are generated in the joint portion 6 is meant .
この実施形態では以下の効果を奏する。
摩擦攪拌接合によって形成された接合部６は、部材表面に対して凹む（例えば、0.2 mm）。したがって、摩擦攪拌接合開始時における回転ツール１０の押込み量P0を維持したままの状態で、接合始端７と接合終端８とをオーバーラップさせると、接合始端７が部材表面に対して凹んでいることから、その凹み分だけ回転ツール１０の押込み量が不足することになる。
本実施形態では、接合始端７よりも、少なくとも、回転ツール１０の外径の１／２の距離だけ手前の位置で、回転ツール１０の押込み量Pを、摩擦攪拌接合開始時の第１押込み量P0から第２押込み量P1（P1＝2PO）へ増加させてオーバラップ部９を形成することにより、オーバーラップ部９における押込み量P1と、他の部分（オーバーラップさせていない部分）の押込み量P0とを同一にした。言い換えると、本実施形態では、押込み量Pが不足する手前の位置、すなわち、回転ツール１０が接合始端７に到達する手前の位置で、押込み量Pを第１押込み量P0から第２押込み量P1へ、接合始端７の凹みによる回転ツール１０の押込み量Pの不足分（本実施形態では、0.2 mm）だけ、押込み量Pを増加させる。これにより、本実施形態では、オーバラップ部９における回転ツール１０の押込み量Pの不足を解消することができ、さらに、第１押込み量P0および第２押込み量P1を予め決められた押込み量の範囲内に設定することで、全周に亘って穴あきのない良好な接合部６が得られ、密閉容器１の密閉度ひいては品質を確保することができる。
This embodiment has the following effects.
The joint 6 formed by the friction stir welding is recessed (for example, 0.2 mm) with respect to the member surface. Therefore, when the joining start end 7 and the joining end 8 are overlapped while maintaining the pushing amount P0 of the rotary tool 10 at the start of friction stir welding, the joining start end 7 is recessed with respect to the member surface. Therefore, the pressing amount of the rotary tool 10 is insufficient by the amount of the recess.
In the present embodiment, the push amount P of the rotary tool 10 is set to the first push amount at the start of friction stir welding at a position that is at least a distance half the outer diameter of the rotary tool 10 from the welding start end 7. By forming the overlap portion 9 by increasing from P0 to the second push amount P1 (P1 = 2PO), the push amount P1 in the overlap portion 9 and the push amount of the other portion (the portion that is not overlapped) and P0 was the same. In other words, in this embodiment, the push amount P is changed from the first push amount P0 to the second push amount P1 at a position before the push amount P is short, that is, a position before the rotary tool 10 reaches the joining start end 7. Further, the pushing amount P is increased by an insufficiency (0.2 mm in this embodiment) of the pushing amount P of the rotary tool 10 due to the depression of the joining start end 7. Thereby, in this embodiment, the shortage of the pushing amount P of the rotary tool 10 in the overlap part 9 can be eliminated, and the first pushing amount P0 and the second pushing amount P1 are set to predetermined pushing amounts. By setting within the range, a good joint 6 having no perforations can be obtained over the entire circumference, and the sealing degree of the sealed container 1 and the quality can be ensured.
なお、実施形態は上記に限定されるものではなく、例えば次のように構成してもよい。
本実施形態では、回転ツール１０の押込み量Pを、摩擦攪拌接合開始時の第１押込み量P0から、接合始端７の手前で、第２押込み量P1に２倍に増加させて接合始端７と接合終端８とをオーバラップさせたが、接合部６の凹みによる押込み量の不足が解消でき、さらに、増加させる前後の各押込み量P0、P1が予め決められた押込み量の範囲内であれば、厳密に２倍である必要はない。
本実施形態では、回転ツール１０の押込み量Pは、接合始端７よりも、少なくとも、回転ツール１０の外径の１／２の距離だけ手前の位置で増加させればよく、例えば、接合始端７よりも、回転ツール１０の外径と同一の距離（本実施形態では、7 mm）だけ手前の位置で、回転ツール１０の押込み量Pを、第１押込み量POから第２押込み量P1へ増加させてもよい。
本実施形態では、オーバラップ部９を１箇所だけ設けて接合部６を形成したが、必要に応じて、オーバラップ部９を複数箇所設けて接合部６を形成してもよい。
In addition, embodiment is not limited above, For example, you may comprise as follows.
In the present embodiment, the pushing amount P of the rotary tool 10 is increased by a factor of two from the first pushing amount P0 at the start of friction stir welding to the second pushing amount P1 before the joining starting end 7 and Although the joining end 8 is overlapped, the insufficiency of the pushing amount due to the dent of the joining portion 6 can be solved, and if the pushing amounts P0 and P1 before and after the increase are within the predetermined pushing amount range, respectively. Need not be exactly double.
In the present embodiment, the pushing amount P of the rotary tool 10 may be increased at a position that is at least a half the outer diameter of the rotary tool 10 from the joining start end 7, for example, the joining start end 7. In addition, the push amount P of the rotary tool 10 is increased from the first push amount PO to the second push amount P1 at a position in front of the outer diameter of the rotary tool 10 by the same distance (7 mm in this embodiment). You may let them.
In this embodiment, only one overlap portion 9 is provided and the joint portion 6 is formed. However, if necessary, a plurality of overlap portions 9 may be provided to form the joint portion 6.
１ 密閉容器、２ 容器本体（本体）、３ 開口部、４ 蓋体、５ 合せ部、６ 接合部、７ 接合始端、８ 接合終端、９ オーバラップ部、１０ 回転ツール DESCRIPTION OF SYMBOLS 1 Airtight container, 2 Container main body (main body), 3 Opening part, 4 Cover body, 5 Alignment part, 6 Joining part, 7 Joining start end, 8 Joining end, 9 Overlap part, 10 Rotating tool
Claims (4)
回転ツールを第１押込み量で前記合せ部に沿って移動させ、接合始端よりも、少なくとも、前記回転ツールの外径の１／２の距離だけ手前の位置で、前記回転ツールの押込み量を、前記接合始端の凹みによる前記回転ツールの押込み量の不足分だけ押込み量を増加させた第２押込み量に増加させ、該第２押込み量を維持しつつ、前記接合始端と接合終端とをオーバーラップさせることを特徴とする摩擦攪拌接合方法。 A method of friction stir welding over the entire circumference of a combined portion of an opening formed in a main body and a lid that closes the opening,
The rotary tool is moved along the mating portion by a first push amount, and the push amount of the rotary tool is set at a position at least half the outer diameter of the rotary tool from the joining start end . The indentation amount of the rotary tool due to the depression of the joining start end is increased to the second pushing amount that is increased by the amount of pushing, and the joining start end and the joining end are overlapped while maintaining the second pushing amount. A friction stir welding method, characterized by comprising:
前記第２押込み量は、前記第１押込み量の２倍に設定されることを特徴とする請求項１に記載の摩擦攪拌接合方法。 The first push amount and the second push amount are set within a predetermined push amount range,
2. The friction stir welding method according to claim 1 , wherein the second pushing amount is set to be twice the first pushing amount.
前記開口部と前記蓋体との接合部に、接合始端と接合終端とをオーバーラップさせて形成されるオーバーラップ部を設け、
該オーバーラップ部は、前記接合始端よりも、少なくとも、回転ツールの外径の１／２の距離だけ手前の位置で、前記回転ツールの押込み量が前記接合始端の凹みによる前記回転ツールの押込み量の不足分だけ増加されて形成されることを特徴とする密閉容器。 A sealed container in which the joint portion of the opening formed in the main body and the lid for closing the opening is friction stir welded over the entire circumference,
In the joint portion between the opening and the lid, an overlap portion formed by overlapping a joint start end and a joint end is provided,
The overlap portion is at least a half distance of the outer diameter of the rotary tool from the joining start end, and the pushing amount of the rotating tool is the pushing amount of the rotating tool due to the depression of the joining start end. An airtight container formed by being increased by a shortage of
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