JP5911172B2 - Friction stir welding method - Google Patents

Friction stir welding method Download PDF

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JP5911172B2
JP5911172B2 JP2012121099A JP2012121099A JP5911172B2 JP 5911172 B2 JP5911172 B2 JP 5911172B2 JP 2012121099 A JP2012121099 A JP 2012121099A JP 2012121099 A JP2012121099 A JP 2012121099A JP 5911172 B2 JP5911172 B2 JP 5911172B2
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aluminum alloy
alloy plate
friction stir
plating layer
stir welding
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JP2013244519A (en
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佳佑 蔦
佳佑 蔦
佐山 満
満 佐山
小林 努
努 小林
朋哉 齋藤
朋哉 齋藤
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FTECH CO., LTD.
Honda Motor Co Ltd
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Honda Motor Co Ltd
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Description

本発明は摩擦撹拌接合技術の改良に関する。   The present invention relates to an improvement in friction stir welding technology.

摩擦撹拌接合法は、高速で回転する接合ツールを被接合材に当て、発生する摩擦熱で被接合材同士を接合する接合法である。
ただし、被接合材がめっき鋼板である場合、めっき層の成分が異物として接合部に混入し、接合部が不健全になることがある。対策として、めっき層を予め除去することが推奨される(例えば、特許文献1(図4)参照。)。
The friction stir welding method is a joining method in which a welding tool that rotates at high speed is applied to a material to be joined, and the materials to be joined are joined together by generated frictional heat.
However, when the material to be joined is a plated steel plate, the components of the plating layer may be mixed into the joint as foreign matters, and the joint may become unhealthy. As a countermeasure, it is recommended to remove the plating layer in advance (see, for example, Patent Document 1 (FIG. 4)).

特許文献1を次図に基づいて説明する。
図14は従来の技術の基本原理を説明する図であり、ホルダ100に、接合ツール101及び切削ツール102を設けておき、この切削ツール102で予めめっき層103を除去する。その後に、接合ツール101で被接合材104同士を接合する。
Patent document 1 is demonstrated based on the following figure.
FIG. 14 is a diagram for explaining the basic principle of the prior art. A joining tool 101 and a cutting tool 102 are provided in a holder 100, and the plating layer 103 is removed in advance by the cutting tool 102. FIG. Thereafter, the materials to be joined 104 are joined with the joining tool 101.

合金化溶融めっき法によるめっき層103の硬さは、300Hv前後であり、工具鋼の硬さに匹敵する。そのため、切削ツール102の先端に設ける砥石105が摩耗する。
このときの摩耗量は、研削長さに比例する。被接合材の長さが、例えば250mmであれば、砥石105で略250mm分だけめっき層103を研削する必要がある。
砥石105を高頻度で交換する必要があり、交換の度に装置を止める必要があるため、生産性が低下する。併せて、砥石105の交換費用も嵩む。
The hardness of the plating layer 103 by the alloying hot dipping method is around 300 Hv, which is comparable to the hardness of the tool steel. Therefore, the grindstone 105 provided at the tip of the cutting tool 102 is worn.
The amount of wear at this time is proportional to the grinding length. If the length of the material to be joined is, for example, 250 mm, it is necessary to grind the plating layer 103 by approximately 250 mm with the grindstone 105.
Since it is necessary to replace the grindstone 105 at a high frequency and it is necessary to stop the apparatus every time it is replaced, productivity is lowered. In addition, the replacement cost of the grindstone 105 increases.

しかし、摩擦撹拌接合部材に関する加工コストの低減が求められる中、生産性の低下や砥石の交換費用の高騰は容認され難い。
そこで、めっき鋼板が被接合材であっても、めっき層除去費用を抑えることができる摩擦撹拌接合技術が求められる。
However, while it is required to reduce the processing cost related to the friction stir welding member, it is difficult to accept a decrease in productivity and an increase in the replacement cost of the grindstone.
Thus, there is a need for a friction stir welding technique that can reduce plating layer removal costs even if the plated steel sheet is a material to be joined.

特開平10−230374号公報JP-A-10-230374

本発明は、めっき鋼板が被接合材であっても、めっき層除去費用を抑えることができる摩擦撹拌接合技術を提供することを課題とする。   This invention makes it a subject to provide the friction stir welding technique which can hold down the plating layer removal expense, even if a plated steel plate is a to-be-joined material.

請求項1に係る発明は、合金化溶融めっき鋼板にアルミニウム合金板を重ね、このアルミニウム合金板側から挿入する接合ツールにより、前記アルミニウム合金板を前記めっき鋼板に接合する摩擦撹拌接合方法において、
めっき層を局部的に除去することにより、前記めっき鋼板に前記接合ツールのピン部の外径より大径の除去部を形成する工程と、
前記除去部に前記アルミニウム合金板を被せるようにして、前記めっき鋼板に前記アルミニウム合金板を重ねる工程と、
回転させた前記接合ツールを、前記除去部に向かって前記アルミニウム合金板側から挿入する工程と、
前記接合ツールの先端が前記除去部に到達したら、前記アルミニウム合金板の面に沿って前記接合ツールを移動させ、前記ピン部の側面でめっき層を除去しながら摩擦撹拌接合を進める工程と、からなることを特徴とする。
The invention according to claim 1 is a friction stir welding method for joining an aluminum alloy plate to the plated steel plate with a joining tool inserted from the aluminum alloy plate side by overlapping an aluminum alloy plate on the alloyed hot-dip steel plate ,
Forming a removed portion having a larger diameter than the outer diameter of the pin portion of the joining tool on the plated steel sheet by locally removing the plating layer;
Overlaying the aluminum alloy plate on the plated steel plate so as to cover the aluminum alloy plate on the removal portion;
Inserting the rotated joining tool from the aluminum alloy plate side toward the removal portion;
When the tip of the joining tool reaches the removal portion, the step of moving the joining tool along the surface of the aluminum alloy plate and proceeding the friction stir welding while removing the plating layer on the side surface of the pin portion, It is characterized by becoming.

請求項2に係る摩擦撹拌接合部材における除去部の大きさは、接合ツールのショルダ部より小径であることを特徴とする。   The size of the removal part in the friction stir welding member according to claim 2 is smaller than the shoulder part of the welding tool.

請求項1は、ピン部の側面でめっき層を除去しながら摩擦撹拌接合を進める工程を含む。始点以外はめっき層が残っているので、このめっき層をピン部の側面で除去する。
ピン部の側面は周速度が大きく、加えて、めっき層は厚さが数μmであるため、めっき層を厚さ直角方向からピン部の側面で除去することに困難さはない。
この理屈により、接合始点だけめっき層を除去するだけで済ませることができる。
すなわち、請求項1に係る発明では、めっき層の除去に当たり、除去部は接合始点だけに形成する。溶接長さ全部を除去する場合に比較して、本発明では接合始点だけの除去に留めることができる。
よって、本発明によれば、めっき鋼板が被接合材であっても、めっき層除去費用を大幅に低減することができる摩擦撹拌接合技術が提供される。
The first aspect includes a step of proceeding the friction stir welding while removing the plating layer on the side surface of the pin portion. Since the plating layer remains except for the starting point, the plating layer is removed on the side surface of the pin portion.
Since the peripheral speed of the side surface of the pin portion is high and the thickness of the plating layer is several μm, there is no difficulty in removing the plating layer from the side surface of the pin portion from the direction perpendicular to the thickness.
By this reason, it is possible to remove only the plating layer only at the joining start point.
That is, in the invention according to claim 1, the removal portion is formed only at the joining start point when removing the plating layer. Compared with the case where the entire weld length is removed, the present invention can only remove the joining start point.
Therefore, according to this invention, even if a plated steel plate is a to-be-joined material, the friction stir welding technique which can reduce a plating layer removal cost significantly is provided.

請求項2に係る発明では、除去部の径は、ショルダ部の径までに留める。
除去部の径は、ピン部の径以上であれば、大きいほど加工誤差等が吸収できる。しかし除去部の径を大きくするほど研削コストが増加する。そこで、ショルダ部の径を上限とすることで、研削コストの増加を抑制する。
In the invention which concerns on Claim 2, the diameter of a removal part is stopped by the diameter of a shoulder part.
If the diameter of the removal portion is equal to or larger than the diameter of the pin portion, the processing error and the like can be absorbed as the removal portion becomes larger. However, the grinding cost increases as the diameter of the removal portion increases. Then, the increase in grinding cost is suppressed by making the diameter of a shoulder part into an upper limit.

本発明に係る摩擦撹拌接合部材の平面図である。It is a top view of the friction stir welding member which concerns on this invention. 図1の2−2線断面図である。FIG. 2 is a sectional view taken along line 2-2 of FIG. 図1の3−3線断面図である。FIG. 3 is a sectional view taken along line 3-3 in FIG. 1. 図3の4部拡大図である。FIG. 4 is an enlarged view of part 4 of FIG. 3. 除去部を形成する工程を説明する図である。It is a figure explaining the process of forming a removal part. 接合ツールをアルミニウム合金板に挿入する工程を説明する図である。It is a figure explaining the process of inserting a joining tool in an aluminum alloy plate. 接合ツールを移動する工程を説明する図である。It is a figure explaining the process of moving a joining tool. 実験に用いる供試材A〜Cの断面図である。It is sectional drawing of the test materials AC used for experiment. 実験で得た製造数を示すグラフである。It is a graph which shows the number of manufacture obtained by experiment. テストピースの形態を示す図である。It is a figure which shows the form of a test piece. 供試材A、Cにおける引張強度のばらつきを示すグラフグラフである。It is a graph which shows the dispersion | variation in the tensile strength in the test materials A and C. FIG. 供試材A、Cにおける引張強度の平均を示すグラフグラフである。It is a graph which shows the average of the tensile strength in the test materials A and C. 本発明に係る変更例を説明する図である。It is a figure explaining the example of a change concerning the present invention. 従来の技術の基本原理を説明する図である。It is a figure explaining the basic principle of the prior art.

本発明の実施の形態を添付図に基づいて以下に説明する。   Embodiments of the present invention will be described below with reference to the accompanying drawings.

図1に示すように、摩擦撹拌接合方法で製造された摩擦撹拌接合部材10は、合金化溶融めっき鋼板(以下、めっき鋼板と記す。)11と、このめっき鋼板11に重ねられたアルミニウム合金板12と、両部材11、12を接合するビード13とからなる。   As shown in FIG. 1, a friction stir welding member 10 manufactured by a friction stir welding method includes an alloyed hot dip plated steel plate (hereinafter referred to as a plated steel plate) 11 and an aluminum alloy plate stacked on the plated steel plate 11. 12 and a bead 13 for joining both members 11 and 12 together.

図2に示すように、ビード13の始点に除去部14の跡が残っている。
図3に示すように、下の合金化溶融めっき鋼板11にアルミニウム合金板12が載せられ、両部材11、12がビード13で接合されている。アルミニウム合金板12は、例えば、厚さが3.0mmのADC3−T5材である。
As shown in FIG. 2, the removal portion 14 remains at the start point of the bead 13.
As shown in FIG. 3, an aluminum alloy plate 12 is placed on the lower alloyed hot-dip plated steel plate 11, and both members 11, 12 are joined by a bead 13. The aluminum alloy plate 12 is, for example, an ADC3-T5 material having a thickness of 3.0 mm.

図4に示すように、合金化溶融めっき鋼板11は、例えば、270MPa級亜鉛鋼板であって、鋼板15と、この鋼板15に被せられる合金溶融めっき法によるめっき層16と、このめっき層16に被されられるカチオン電着層17とからなる。例えば、めっき鋼板11は、厚さが2.0mmである。めっき層16の厚さは5〜6μmであり、カチオン電着層17の厚さは20μm(上限値)である。   As shown in FIG. 4, the galvannealed steel plate 11 is, for example, a 270 MPa grade galvanized steel plate. And a cation electrodeposition layer 17 to be covered. For example, the plated steel plate 11 has a thickness of 2.0 mm. The thickness of the plating layer 16 is 5 to 6 μm, and the thickness of the cationic electrodeposition layer 17 is 20 μm (upper limit value).

以上の述べた摩擦撹拌接合部材10の製造方法を次に述べる。
図5(a)に示すように、めっき鋼板11に、外径が12mmのエンドミル21を臨ませる。
(b)に示すように、エンドミル21で、めっき鋼板11を局部的に切削する。
(c)は(b)の要部拡大図であり、(c)に示すめっき層16とカチオン電着層17の合計厚さが30μm未満であるから、0.03〜0.05mm(30〜50μm)切り込むことで除去部14を形成することができる。
A method for manufacturing the friction stir welding member 10 described above will now be described.
As shown to Fig.5 (a), the end mill 21 whose outer diameter is 12 mm is made to face the plated steel plate 11. FIG.
As shown in (b), the plated steel plate 11 is locally cut by the end mill 21.
(C) is an enlarged view of the main part of (b). Since the total thickness of the plating layer 16 and the cationic electrodeposition layer 17 shown in (c) is less than 30 μm, 0.03 to 0.05 mm (30 to 30 mm). 50 μm), the removal portion 14 can be formed.

なお、めっき層16は、エンドミル21などの切削工具による機械的除去の他、10%濃度の塩酸を主成分とするめっき剥離液による化学的除去により、除去するようにしてもよい。めっき剥離液による場合は、マスキングにより、除去部14の径を確定することができる。   The plating layer 16 may be removed not only by mechanical removal with a cutting tool such as the end mill 21 but also by chemical removal with a plating stripper containing 10% hydrochloric acid as a main component. In the case of using a plating stripper, the diameter of the removal portion 14 can be determined by masking.

(c)のd矢視図である(d)に示すように、除去部14の径D1は約12mmとなる。
(e)に示すように、接合ツール22はショルダ部23とピン部24とを備える。ショルダ部23の外径d2は16mmでピン部の外径d1は7.2mmである。除去部14の径D1は、d1以上でd2以下とすることが推奨される。
As shown in (d) of FIG. 8 (d), the diameter D1 of the removal portion 14 is about 12 mm.
As shown in (e), the joining tool 22 includes a shoulder portion 23 and a pin portion 24. The outer diameter d2 of the shoulder portion 23 is 16 mm, and the outer diameter d1 of the pin portion is 7.2 mm. It is recommended that the diameter D1 of the removal portion 14 is not less than d1 and not more than d2.

図6(a)に示すように、めっき鋼板11にアルミニウム合金板12を重ね、アルミニウム合金板12に接合ツール22を臨ませる。
(b)に示すように、高速回転させる接合ツール22のピン部24は、アルミニウム合金板12を貫通して先端が除去部14に到達する。
As shown in FIG. 6A, the aluminum alloy plate 12 is stacked on the plated steel plate 11, and the joining tool 22 is made to face the aluminum alloy plate 12.
As shown in (b), the pin portion 24 of the joining tool 22 that rotates at a high speed penetrates the aluminum alloy plate 12 and the tip reaches the removal portion 14.

次に、(c)に示すように、接合ツール22をアルミニウム合金板12の上面に沿って白抜き矢印のように移動させる。除去部14に、めっき層16が存在しないため、ピン部24に過度な負担は掛からない。   Next, as shown in (c), the joining tool 22 is moved along the upper surface of the aluminum alloy plate 12 as indicated by a white arrow. Since the plating layer 16 does not exist in the removal portion 14, an excessive burden is not applied to the pin portion 24.

図7(a)に示すように、ピン部24の側面でめっき層16が除去される。めっき層16は5〜6μm程度であり、周速度が大きなピン部24の側面で除去することに困難さはない。
結果、(b)に示すように、接合ツール22を白抜き矢印のように進めることができる。
(b)のc−c線断面図である(c)に示すように、ビード13を介してめっき鋼板11にアルミニウム合金板12が接合される。
As shown in FIG. 7A, the plating layer 16 is removed on the side surface of the pin portion 24. The plating layer 16 is about 5 to 6 μm, and there is no difficulty in removing it on the side surface of the pin portion 24 having a large peripheral speed.
As a result, as shown to (b), the joining tool 22 can be advanced like a white arrow.
As shown in (c), which is a sectional view taken along the line cc of (b), the aluminum alloy plate 12 is joined to the plated steel plate 11 via the bead 13.

すなわち、本発明方法は、図5(a)〜(e)に示すように、めっき層16を局部的に除去するために、切削工具(エンドミル21)又はめっき剥離液を用いてめっき鋼板11に接合ツール22のピン部24の外径d1より大径の除去部14を形成する工程と、図6(a)に示すように、除去部14にアルミニウム合金板12を被せるようにして、めっき鋼板11にアルミニウム合金板12を重ねる工程と、図6(b)に示すように、回転させた接合ツール22を、除去部14に向かってアルミニウム合金板12側から挿入する工程と、図7(a)〜(c)に示すように、接合ツール22の先端が除去部14に到達したら、アルミニウム合金板12の面に沿って接合ツール22を移動させ、ピン部24の側面でめっき層16を除去しながら摩擦撹拌接合を進める工程と、からなる。   That is, in the method of the present invention, as shown in FIGS. 5A to 5E, in order to locally remove the plating layer 16, the cutting tool (end mill 21) or the plating stripping solution is used to apply the plating to the plated steel plate 11. A step of forming the removal portion 14 having a diameter larger than the outer diameter d1 of the pin portion 24 of the joining tool 22 and, as shown in FIG. 11, the step of superimposing the aluminum alloy plate 12 on the surface, the step of inserting the rotated joining tool 22 from the side of the aluminum alloy plate 12 toward the removal portion 14, as shown in FIG. ) To (c), when the tip of the joining tool 22 reaches the removal portion 14, the joining tool 22 is moved along the surface of the aluminum alloy plate 12, and the plating layer 16 is removed on the side surface of the pin portion 24. While A step of advancing the stir welding, consisting of.

すなわち、めっき層16の除去に当たり、除去部14は接合始点だけに形成する。溶接長さ全部を除去する場合に比較して、本発明では接合始点だけの除去に留めることができる。
よって、本発明によれば、めっき鋼板が被接合材であっても、めっき層除去費用を大幅に低減することができる摩擦撹拌接合技術が提供される。
That is, when removing the plating layer 16, the removal part 14 is formed only at the joining start point. Compared with the case where the entire weld length is removed, the present invention can only remove the joining start point.
Therefore, according to this invention, even if a plated steel plate is a to-be-joined material, the friction stir welding technique which can reduce a plating layer removal cost significantly is provided.

(実験例)
本発明に係る実験例を以下に述べる。なお、本発明は実験例に限定されるものではない。
(Experimental example)
Experimental examples according to the present invention will be described below. Note that the present invention is not limited to experimental examples.

○供試材:
供試材として、図8(a)〜(c)に示す3種を準備した。
すなわち、図8(a)に示す供試材Aは、めっき層を除去しないめっき鋼板11を使用した。また、図8(b)に示す供試材Bは、めっき層を接合長さ分だけ全部除去しためっき鋼板11を使用した。除去部14が長くなる。
また、図8(c)に示す供試材Cは、接合始点にのみめっき層を除去しためっき鋼板11を使用した。除去部14は局部的である。
○ Test material:
Three kinds of test materials shown in FIGS. 8A to 8C were prepared.
That is, the specimen A shown in FIG. 8A used a plated steel plate 11 from which the plating layer was not removed. Moreover, the test material B shown in FIG.8 (b) used the plated steel plate 11 from which the plating layer was removed altogether by the joining length. The removal part 14 becomes long.
Moreover, the test material C shown in FIG.8 (c) used the plated steel plate 11 from which the plating layer was removed only at the joining start point. The removal unit 14 is local.

供試材A〜Cともに、同一条件(接合ツールの回転速度:毎分1000回転、移動速度:毎分500mm)で摩擦撹拌接合を実施した。   Friction stir welding was performed under the same conditions (rotation speed of the welding tool: 1000 rotations per minute, movement speed: 500 mm per minute) for all of the test materials A to C.

○供試材Aの場合:
図9(a)に示すように、10個製造した時点で、ピン部が限界まで摩耗した。工具鋼並み硬さの合金めっき層でピン部が摩耗したからである。
○ For sample material A:
As shown in FIG. 9A, the pin part was worn to the limit when 10 pieces were manufactured. This is because the pin portion is worn by the alloy plating layer having the same hardness as tool steel.

○供試材Bの場合:
図9(b)に示すように、40個まで製造できた。めっき層が予め除去されていたからである。
○ In the case of Specimen B:
As shown in FIG. 9B, up to 40 pieces could be manufactured. This is because the plating layer has been removed in advance.

○供試材Cの場合:
図9(c)に示すように、35個まで製造できた。供試材Bに比較した10〜20%減ではあるが、低コストで摩擦撹拌接合が行えることが確認できた。
○ In the case of sample material C:
As shown in FIG. 9C, up to 35 pieces could be manufactured. Although it was a 10-20% reduction compared with the test material B, it was confirmed that the friction stir welding can be performed at a low cost.

○引張強度の比較:
上記ピン部摩耗の検討に用いた供試材A及び供試材Cを利用して、さらに強度比較を行う。
○テストピースの作製:
図10(a)に示すように、供試材A(めっき層有り)を25mm幅で切断することにより10分割し、両端の2個を除く。そして(b)に示すテストピース(T.P)を8個得た。Wは25mmである。
同様に、供試材C(本発明品)とを、を25mm幅で切断することにより10分割し、両端を除いた8個のテストピース(T.P)を得た。
○ Comparison of tensile strength:
Using the test material A and the test material C used for examining the pin part wear, the strength is further compared.
○ Preparation of test piece:
As shown in FIG. 10 (a), the test material A (with plating layer) is cut into 25 mm sections and divided into 10 parts, and the two at both ends are removed. And eight test pieces (TP) shown in (b) were obtained. W is 25 mm.
Similarly, the sample material C (product of the present invention) was cut into 25 mm widths and divided into 10 parts to obtain 8 test pieces (TP) excluding both ends.

○供試材Aでの引張強度:
得られたテストピース(T.P)を引張試験機にかけ、引張強度を測定した。ただし、測定値はPa(パスカル)ではなく、W=25mm当たりのN(ニュートン)で表示する。
測定結果を、表1に示す。
○ Tensile strength of specimen A:
The obtained test piece (TP) was subjected to a tensile tester and the tensile strength was measured. However, the measured value is displayed not in Pa (Pascal) but in N (Newton) per W = 25 mm.
The measurement results are shown in Table 1.

Figure 0005911172
Figure 0005911172

1個目の供試材Aから8本のテストピースを切り出したので、8個の測定値(引張強度)が得られた。例えば、1個目の1番が7820Nで、8番が6000Nであった。8個の測定値中、最小が4817N、最大が9577Nであり、8個の平均値が7274Nである。測定値の表示は省略するが、3個目、5個目、7個目における最小、最大、平均を表に示す。   Since eight test pieces were cut out from the first specimen A, eight measurement values (tensile strength) were obtained. For example, the first number was 7820N and the number 8 was 6000N. Among the 8 measured values, the minimum is 4817N, the maximum is 9577N, and the average value of 8 is 7274N. Although display of measured values is omitted, the minimum, maximum, and average of the third, fifth, and seventh items are shown in the table.

○供試材Cでの引張強度:
同様に、供試材Cについても引張強度を測定し、最小、最大、平均を表2に示す。
○ Tensile strength of sample material C:
Similarly, the tensile strength of the test material C was measured, and the minimum, maximum and average values are shown in Table 2.

Figure 0005911172
Figure 0005911172

○比較:
最小、最大に基づく測定値のばらつきをグラフ化する。
図11(a)に示すように、供試材A(めっき層有り)については、引張強度のばらつきが大きい。これに対して、(b)に示すように、供試材C(本発明品)については、引張強度のばらつきが大幅に小さくなる。
○ Comparison:
Graph the measurement value variation based on the minimum and maximum.
As shown to Fig.11 (a), about the test material A (with a plating layer), the dispersion | variation in tensile strength is large. On the other hand, as shown in (b), the specimen material C (product of the present invention) has a greatly reduced variation in tensile strength.

また、平均をグラフ化する。
図12に示すように、供試材A平均に対し、供試材C平均は大きくなる。
本発明品は、図11(b)に示すように引張強度のばらつきが少なく、図12に示すように、引張強度が大きいことが確認できた。
The average is graphed.
As shown in FIG. 12, the specimen C average is larger than the specimen A average.
It was confirmed that the product of the present invention had a small tensile strength variation as shown in FIG. 11B and a high tensile strength as shown in FIG.

尚、図13(a)〜(c)に示すように、エンドミル21でアルミニウム合金板12を貫通して、下位のめっき鋼板11に除去部14を形成する。エンドミル21を接合ツール22に交換し、この接合ツール22で摩擦撹拌接合を実施するようにしてもよい。この場合は、例えば、接合ツール22のピン部24の径が7.2mmであれば、8.0mm径のエンドミル21を用いる。   As shown in FIGS. 13A to 13C, the end mill 21 penetrates the aluminum alloy plate 12 to form a removal portion 14 in the lower plated steel plate 11. The end mill 21 may be replaced with a welding tool 22 and the friction stir welding may be performed with the welding tool 22. In this case, for example, if the diameter of the pin portion 24 of the joining tool 22 is 7.2 mm, the end mill 21 having a diameter of 8.0 mm is used.

また、切削工具は、エンドミルが好適であるが、フライスや研削砥石であってもよく、種類は任意である。   The cutting tool is preferably an end mill, but may be a milling cutter or a grinding wheel, and the type is arbitrary.

本発明は、車体フレームの接合に好適である。   The present invention is suitable for joining vehicle body frames.

10…摩擦撹拌接合部材、11…合金化溶融めっき鋼板(めっき鋼板)、12…アルミニウム合金板、13…ビード、14…除去部、16…めっき層、21…切削工具(エンドミル)、22…接合ツール、23…ショルダ部、24…ピン部、D1…除去部の径、d1…ピン部の外径、d2…ショルダ部の外径。   DESCRIPTION OF SYMBOLS 10 ... Friction stir welding member, 11 ... Alloyed hot dipped steel plate (plated steel plate), 12 ... Aluminum alloy plate, 13 ... Bead, 14 ... Removal part, 16 ... Plating layer, 21 ... Cutting tool (end mill), 22 ... Joining Tool, 23 ... Shoulder part, 24 ... Pin part, D1 ... Diameter of removal part, d1 ... Outer diameter of pin part, d2 ... Outer diameter of shoulder part.

Claims (2)

合金化溶融めっき鋼板にアルミニウム合金板を重ね、このアルミニウム合金板側から挿入する接合ツールにより、前記アルミニウム合金板を前記めっき鋼板に接合する摩擦撹拌接合方法において、
めっき層を局部的に除去することにより、前記めっき鋼板に前記接合ツールのピン部の外径より大径の除去部を形成する工程と、
前記除去部に前記アルミニウム合金板を被せるようにして、前記めっき鋼板に前記アルミニウム合金板を重ねる工程と、
回転させた前記接合ツールを、前記除去部に向かって前記アルミニウム合金板側から挿入する工程と、
前記接合ツールの先端が前記除去部に到達したら、前記アルミニウム合金板の面に沿って前記接合ツールを移動させ、前記ピン部の側面でめっき層を除去しながら摩擦撹拌接合を進める工程と、からなることを特徴とする摩擦撹拌接合方法。
In the friction stir welding method for joining the aluminum alloy plate to the plated steel plate, by joining the aluminum alloy plate to the alloyed hot-dip steel plate and joining the aluminum alloy plate from the aluminum alloy plate side ,
Forming a removed portion having a larger diameter than the outer diameter of the pin portion of the joining tool on the plated steel sheet by locally removing the plating layer;
Overlaying the aluminum alloy plate on the plated steel plate so as to cover the aluminum alloy plate on the removal portion;
Inserting the rotated joining tool from the aluminum alloy plate side toward the removal portion;
When the tip of the joining tool reaches the removal portion, the step of moving the joining tool along the surface of the aluminum alloy plate and proceeding the friction stir welding while removing the plating layer on the side surface of the pin portion, A friction stir welding method characterized by comprising:
前記除去部の大きさは、前記接合ツールのショルダ部より小径であることを特徴とする請求項1記載の摩擦撹拌接合方法。 The friction stir welding method according to claim 1, wherein a size of the removing portion is smaller than a shoulder portion of the welding tool .
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