CN103894727B

CN103894727B - Friction stirring connecting method

Info

Publication number: CN103894727B
Application number: CN201410138108.7A
Authority: CN
Inventors: J·马丁; 堀久司; 濑尾伸城
Original assignee: Welding Institute England; Nippon Light Metal Co Ltd
Current assignee: Welding Institute England; Nippon Light Metal Co Ltd
Priority date: 2011-01-19
Filing date: 2011-12-26
Publication date: 2016-09-14
Anticipated expiration: 2031-12-26
Also published as: CN103459081A; CN103934565B; KR20140029390A; CN104002037A; KR101471320B1; JP5559214B2; JP2013027921A; TW201235138A; CN103459081B; CN104002037B; WO2012098810A1; TWI494185B; CN103934565A; CN103894727A

Abstract

The present invention provides a kind of joint method, when using twin shaft shoulder stirring-head type instrument to engage a pair metallic plate, it is possible to suppresses the generation of joint defect and can engage well.Throw unit (2) has twin shaft shoulder stirring-head type instrument (5), this twin shaft shoulder stirring-head type instrument (5) is by the first shaft shoulder portion (11), second shaft shoulder portion (12) and the pin (13) being formed between the first shaft shoulder portion (11) and the second shaft shoulder portion (12) are constituted, throw unit (2) has the keeper (3) of cylindrical shape, it is inserted into the sliding axle (4) that keeper (3) is internal and rotates integrally with keeper (3), first shaft shoulder portion (11) is fixed on twin shaft shoulder stirring-head type instrument (5) and so that the sliding members (6) that is formed between keeper (3) and sliding axle (4) relative to the mode that keeper (3) slides axially of sliding axle (4) of the front end of sliding axle (4).

Description

Friction stirring connecting method

Present patent application be international application no be PCT/JP2011/080081, international filing date is in December, 2011 26, entering the Application No. 201180065081.8 of National Phase in China, entitled " throw unit, friction-stir connect Conjunction method, the assembly of double face slab and the friction stirring connecting method of double face slab " the divisional application of application for a patent for invention.

Technical field

The present invention relates to the rotation with twin shaft shoulder stirring-head type instrument (Japanese: ボ PVC Application Star Le, bobbin tool) Turn tool unit, use above-mentioned throw unit friction stirring connecting method, use above-mentioned throw unit engage and The assembly of the double face slab become and use the friction stirring connecting method of double face slab of above-mentioned throw.

Background technology

Carry out friction-stir each other connect conventionally, there is known twin shaft shoulder stirring-head type instrument is used as the end face to metallic plate The instrument (with reference to patent documentation 1) closed.Twin shaft shoulder stirring-head type instrument includes a pair shaft shoulder portion and between above-mentioned shaft shoulder portion The pin formed.When being engaged by a pair metallic plate, make it immovable, by the twin shaft shoulder of high speed rotating by fixing for metallic plate Stirring head dummy instrument inserts from one end of metallic plate, and makes pin move along docking section.Thereby, the metal of end face each surrounding is just Made metallic plate be engaged with each other by friction-stir.If using twin shaft shoulder stirring-head type instrument, due to the rear side at metallic plate Also there is shaft shoulder portion, therefore, generally can omit the back of the body connection member (Japanese: when portion's material) of the rear side being arranged in metallic plate. Particularly, when the end of hollow material is engaged with each other, complex owing to arranging the operation of back of the body connection member, accordingly, it is capable to greatly Width saves operation routine.

On the other hand, conventionally, there is known double face slab that is two pieces of metallic plates are overlapping and that constitute.Double face slab is used as railway The structure of vehicle, aircraft, ship, civil construction thing etc..As described in patent documentation 2, double face slab includes outside plate, inner panel And the support plate being folded between outside plate and inner panel.Additionally, when double face slab is engaged with each other, make outside adjacent double face slab Plate end is docked with outside plate end, inner panel end is docked with inner panel end, after forming the assembly of double face slab, uses and rotates Partial frictional stirring after docking is engaged by instrument.

Prior art literature

Patent documentation

Patent documentation 1: No. 2712838 publication of Japanese Patent Laid

Patent documentation 2: Japanese Patent Laid-Open 2008-272768 publication

Summary of the invention

Invent technical problem to be solved

But, in the friction-stir using twin shaft shoulder stirring-head type instrument engages, it may be desirable to, make pin Axial centre engages while the center alignment of the short transverse of metallic plate, but, metallic plate can be because of frictional heat sometimes And deform.Once metallic plate deforms because of frictional heat, then the center sold just cannot with the center alignment of metallic plate, and Cause joint bad.

If additionally, the distance between shaft shoulder portion is bigger than the thickness of metallic plate, then by friction-stir by after Plastic Flow Metal be easily spilled over to the outside in shaft shoulder portion, accordingly, there exist the such problem of joint defect that easily produces.

Additionally, the outer peripheral face of the pin of twin shaft shoulder stirring-head type instrument is carved with helicla flute sometimes, but because of spiral fluted side To or carve the difference of scope set, there is the groove formed on the decorative cover of metallic plate upon engagement and become big or decorative cover The many such problems of burr of upper generation.

Additionally, due to double face slab is thin and long hardware, therefore, make the outside plate of a pair double face slab and outside plate, The operation that inner panel carries out with inner panel docking accurately is the most difficult.Even if additionally, using fixture by the assembly of double face slab Fixing makes it immovable, there is also and makes throw move the such problem separated from one another of double face slab when engaging.

The present invention completes in view of the above problems, and its technical problem is that providing a kind of is using twin shaft shoulder stirring-head type The generation that can suppress joint defect when a pair metallic plate is engaged by instrument the throw that can engage ideally Unit and friction stirring connecting method.Additionally, its technical problem is when the periphery of the pin at twin shaft shoulder stirring-head type instrument When helicla flute is carved with in face, it is possible to reduce the burr produced on the decorative cover of metallic plate, or shape on decorative cover can be reduced The groove become.It addition, the technical problem of the present invention is to provide a kind of double face slab that can be engaged by double face slab ideally Assembly and the friction stirring connecting method of double face slab.

Solve the technical scheme that technical problem is used

In order to solve above-mentioned technical problem, the present invention proposes a kind of friction stirring connecting method, uses friction-stir device Engaging a pair metallic plate, above-mentioned friction-stir device is configured to include twin shaft shoulder stirring-head type instrument and slip Axle, wherein, above-mentioned twin shaft shoulder stirring-head type instrument have the first shaft shoulder portion, the second shaft shoulder portion and above-mentioned first shaft shoulder portion with The pin formed between above-mentioned second shaft shoulder portion, when making metallic plate deform because of friction-stir, makes the edge, position of above-mentioned metallic plate During above-mentioned twin shaft shoulder stirring-head type instrument axially displaced, above-mentioned twin shaft shoulder stirring-head type instrument is along with above-mentioned metallic plate Shifting and be axially moveable, it is characterized in that, above-mentioned friction stirring connecting method includes: docking operation, in this docking operation, makes The end face of above-mentioned metallic plate abuts each other；And bonding process, in this bonding process, make above-mentioned first shaft shoulder portion with above-mentioned The decorative cover of metallic plate is relative, and after making the axial centre of above-mentioned pin be directed at the center in the thickness of slab direction of above-mentioned metallic plate, makes Be viewed as from above-mentioned sliding axle side the pin of the above-mentioned twin shaft shoulder stirring-head type instrument towards right rotation move to by above-mentioned end face that The docking section formed after this docking, carries out friction-stir joint, the distance between shaft shoulder portion is set as the plate of above-mentioned metallic plate Below thickness, it is formed with the helicla flute of right-hand thread, the spiral shell of above-mentioned right-hand thread in above-mentioned first side, shaft shoulder portion of the outer peripheral face of above-mentioned pin Spin slot is formed with the ratio of more than 25% relative to the distance between above-mentioned first shaft shoulder portion and above-mentioned second shaft shoulder portion, the right spiral shell of reason The metal that the helicla flute of stricture of vagina causes moves, and obtains above-mentioned twin shaft shoulder stirring-head type instrument and is pressed towards above-mentioned sliding axle side.

According to above-mentioned joint method, the right-hand thread of the first side, shaft shoulder portion is formed with the ratio of more than 25%, and therefore, reason is right The metal that the helicla flute of screw thread causes moves so that twin shaft shoulder stirring-head type instrument is pressed towards sliding axle side, it is thus possible to anti- Only twin shaft shoulder stirring-head type instrument enters too far into the decorative cover of metallic plate.Thereby, can prevent from producing groove at decorative cover, or Even if person is to be formed with groove also to reduce the degree of depth of groove.

Additionally, it is preferable that, in above-mentioned outer peripheral face, from be formed the spiral fluted part of above-mentioned right-hand thread to Between above-mentioned second shaft shoulder portion, it is formed with the helicla flute of left-hand thread.

According to above-mentioned joint method, the stirring efficiency of friction-stir can be improved.

Further it is proposed that a kind of friction stirring connecting method, use friction-stir device that a pair metallic plate is entered Row engages, and described friction-stir device is configured to include twin shaft shoulder stirring-head type instrument and sliding axle, wherein, described double-shaft shoulder Portion's stirring head dummy instrument has the first shaft shoulder portion, the second shaft shoulder portion and between described first shaft shoulder portion and described second shaft shoulder portion The pin formed, when making metallic plate deform because of friction-stir, makes the position of described metallic plate along described twin shaft shoulder stirring-head During type instrument axially displaced, described twin shaft shoulder stirring-head type instrument is axially moveable along with the displacement of described metallic plate, It is characterized in that, described friction stirring connecting method includes: docking operation, in this docking operation, makes the end face of described metallic plate Abut each other；And bonding process, in this bonding process, in the decorative cover phase making described first shaft shoulder portion and described metallic plate Right, and after making the axial centre of described pin be directed at the center in the thickness of slab direction of described metallic plate, make to see from described sliding axle side It is right for formed after moving to abut each other described end face towards the pin of the described twin shaft shoulder stirring-head type instrument of anticlockwise to examine Meet portion, carry out friction-stir joint, the distance between shaft shoulder portion is set as below the thickness of slab of described metallic plate, at described pin Described first side, shaft shoulder portion of outer peripheral face is formed with the helicla flute of left-hand thread, and the helicla flute of described left-hand thread is relative to the described shaft shoulder Distance between portion is formed with the ratio of more than 25%, and the metal that the helicla flute of reason left-hand thread causes moves so that described twin shaft Shoulder stirring head dummy instrument is pressed towards described sliding axle side.

According to above-mentioned joint method, the left-hand thread of the first side, shaft shoulder portion is formed with the ratio of more than 25%, and therefore, reason is left The metal that the helicla flute of screw thread causes moves so that twin shaft shoulder stirring-head type instrument is pressed towards sliding axle side, it is thus possible to anti- Only twin shaft shoulder stirring-head type instrument enters too far into the decorative cover of metallic plate.Thereby, can prevent from producing groove at decorative cover, or Even if person is to be formed with groove also to reduce the degree of depth of groove.

Additionally, it is preferable that, in above-mentioned outer peripheral face, from be formed the spiral fluted part of above-mentioned left-hand thread to Between above-mentioned second shaft shoulder portion, it is formed with the helicla flute of right-hand thread.

Further it is proposed that a kind of friction stirring connecting method, use friction-stir device that a pair metallic plate is entered Row engages, and above-mentioned friction-stir device is configured to include twin shaft shoulder stirring-head type instrument and sliding axle, wherein, above-mentioned double-shaft shoulder Portion's stirring head dummy instrument has the first shaft shoulder portion, the second shaft shoulder portion and between above-mentioned first shaft shoulder portion and above-mentioned second shaft shoulder portion The pin formed, when making metallic plate deform because of friction-stir, makes the position of above-mentioned metallic plate along above-mentioned twin shaft shoulder stirring-head During type instrument axially displaced, above-mentioned twin shaft shoulder stirring-head type instrument is axially moveable along with the displacement of above-mentioned metallic plate, It is characterized in that, above-mentioned friction stirring connecting method includes: docking operation, in this docking operation, makes the end face of above-mentioned metallic plate Abut each other；And bonding process, in this bonding process, in the decorative cover phase making above-mentioned second shaft shoulder portion and above-mentioned metallic plate Right, and after making the axial centre of above-mentioned pin be directed at the center in the thickness of slab direction of above-mentioned metallic plate, make to see from above-mentioned sliding axle side It is right for formed after moving to abut each other above-mentioned end face towards the pin of the above-mentioned twin shaft shoulder stirring-head type instrument of right rotation to examine Meet portion, carry out friction-stir joint, the distance between shaft shoulder portion is set as below the thickness of slab of above-mentioned metallic plate, at above-mentioned pin Above-mentioned second side, shaft shoulder portion of outer peripheral face is formed with the helicla flute of left-hand thread, and the helicla flute of above-mentioned left-hand thread is relative to the above-mentioned shaft shoulder Distance between portion is formed with the ratio of more than 25%, and the metal that the helicla flute of reason left-hand thread causes moves so that above-mentioned twin shaft Shoulder stirring head dummy instrument is by towards pressing with above-mentioned sliding axle opposite side.

According to above-mentioned joint method, the left-hand thread of the second side, shaft shoulder portion is formed with the ratio of more than 25%, and therefore, reason is left The metal that the helicla flute of screw thread causes moves so that twin shaft shoulder stirring-head type instrument is pressed towards the side contrary with sliding axle Pressure, it is thus possible to prevent twin shaft shoulder stirring-head type instrument from entering too far into the decorative cover of metallic plate.Thereby, can prevent at decorative cover Produce groove, even if or being formed with groove and also can reduce the degree of depth of groove.

Additionally, it is preferable that, in above-mentioned outer peripheral face, from be formed the spiral fluted part of above-mentioned left-hand thread to Between above-mentioned first shaft shoulder portion, it is formed with the helicla flute of right-hand thread.

Further it is proposed that a kind of friction stirring connecting method, use friction-stir device that a pair metallic plate is entered Row engages, and above-mentioned friction-stir device is configured to include twin shaft shoulder stirring-head type instrument and sliding axle, wherein, above-mentioned double-shaft shoulder Portion's stirring head dummy instrument has the first shaft shoulder portion, the second shaft shoulder portion and between above-mentioned first shaft shoulder portion and above-mentioned second shaft shoulder portion The pin formed, when making metallic plate deform because of friction-stir, makes the position of above-mentioned metallic plate along above-mentioned twin shaft shoulder stirring-head During type instrument axially displaced, above-mentioned twin shaft shoulder stirring-head type instrument is axially moveable along with the displacement of above-mentioned metallic plate, It is characterized in that, above-mentioned friction stirring connecting method includes: docking operation, in this docking operation, makes the end face of above-mentioned metallic plate Abut each other；And bonding process, in this bonding process, in the decorative cover phase making above-mentioned second shaft shoulder portion and above-mentioned metallic plate Right, and after making the axial centre of above-mentioned pin be directed at the center in the thickness of slab direction of above-mentioned metallic plate, make to see from above-mentioned sliding axle side It is right for formed after moving to abut each other above-mentioned end face towards the pin of the above-mentioned twin shaft shoulder stirring-head type instrument of anticlockwise to examine Meet portion, carry out friction-stir joint, the distance between shaft shoulder portion is set as below the thickness of slab of above-mentioned metallic plate, at above-mentioned pin Above-mentioned second side, shaft shoulder portion of outer peripheral face is formed with the helicla flute of right-hand thread, and the helicla flute of above-mentioned right-hand thread is relative to the above-mentioned shaft shoulder Distance between portion is formed with the ratio of more than 25%, and the metal that the helicla flute of reason right-hand thread causes moves so that above-mentioned twin shaft Shoulder stirring head dummy instrument is by towards pressing with above-mentioned sliding axle opposite side.

According to above-mentioned joint method, the right-hand thread of the second side, shaft shoulder portion is formed with the ratio of more than 25%, and therefore, reason is right The metal that the helicla flute of screw thread causes moves so that twin shaft shoulder stirring-head type instrument is pressed towards the side contrary with sliding axle Pressure, it is thus possible to prevent twin shaft shoulder stirring-head type instrument from entering too far into the decorative cover of metallic plate.Thereby, can prevent at decorative cover Produce groove, even if or being formed with groove and also can reduce the degree of depth of groove.

Additionally, it is preferable that, in above-mentioned outer peripheral face, from be formed the spiral fluted part of above-mentioned right-hand thread to Between above-mentioned first shaft shoulder portion, it is formed with the helicla flute of left-hand thread.

Additionally, it is preferable that, in above-mentioned bonding process, same what the decorative cover of above-mentioned metallic plate was cooled down Shi Jinhang engages.

According to above-mentioned joint method, risen by the temperature of the metal of suppression liquidation, can further suppress groove Produce.

Invention effect

Throw unit according to the present invention and friction stirring connecting method, it is possible to the generation of suppression joint defect, and Can engage ideally.Additionally, according to the assembly of the double face slab of the present invention and the friction-stir joint side of double face slab Method, it is possible to ideally double face slab is engaged.

Accompanying drawing explanation

Fig. 1 is friction-stir device and the axonometric chart of hollow material representing embodiment 1.

Fig. 2 is the mated condition representing hollow material, wherein, before Fig. 2 (a) represents docking, after Fig. 2 (b) represents docking.

Fig. 3 is the axonometric chart of the friction-stir device representing embodiment 3, and wherein, Fig. 3 (a) represents overall diagram, Fig. 3 (b) Represent keeper, sliding axle and sliding members.

Fig. 4 is the I-I sectional view of Fig. 3.

Fig. 5 is the II-II sectional view of Fig. 3.

Fig. 6 is the side view of the twin shaft shoulder stirring-head type instrument representing embodiment 1.

Fig. 7 is the figure of the friction stirring connecting method representing embodiment 1, and wherein, Fig. 7 (a) is sectional view, Fig. 7 (b) It it is the III-III end view drawing of Fig. 7 (a).

Fig. 8 is the side view of the twin shaft shoulder stirring-head type instrument representing embodiment 2.

Fig. 9 is the sectional view of the friction stirring connecting method representing embodiment 2.

Figure 10 (a) represents the first variation of friction stirring connecting method, and Figure 10 (b) represents friction stirring connecting method Second variation.

Figure 11 is the figure of the throw unit representing variation, and wherein, Figure 11 (a) is sectional view, and Figure 11 (b) is figure The IV-IV sectional view of 11 (a).

Figure 12 is the axonometric chart of the double face slab representing embodiment 3.

Figure 13 is the axonometric chart of the friction-stir device representing embodiment 3.

Figure 14 is the axonometric chart of the throw unit representing embodiment 3.

Figure 15 is the side view of the twin shaft shoulder stirring-head type instrument representing embodiment 3.

Figure 16 is the front view of the preparatory process of the friction stirring connecting method representing embodiment 3.

Figure 17 is the axonometric chart of the first bonding process of the friction stirring connecting method representing embodiment 3.

Figure 18 is the axonometric chart of the second bonding process of the friction stirring connecting method representing embodiment 3.

Figure 19 is the front view of the variation of the engaging form representing embodiment 3.

Figure 20 is the table of the combination representing the test body in embodiment 1.

Figure 21 is to represent in embodiment 1, the figure of the relation between the gap of test body H1 and the thickness at junction surface.

Figure 22 is to represent in embodiment 1, the figure of the relation between the gap of test body H3 and the thickness at junction surface.

Figure 23 is to represent in embodiment 1, affects the table of relation between the thickness of the metallic plate of bond quality and gap, It illustrates the situation of the thickness of the thickness=Re side of Ad side.

Figure 24 is the table representing the relation affected between the plate thickness of bond quality and gap, it illustrates and makes Ad side The situation that thickness changes and fixed by the thickness of Re side.

Figure 25 is the table representing the relation affected between the plate thickness of bond quality and gap, it illustrates Ad side The situation that thickness is fixed and made the thickness of Re side change.

Figure 26 (a) is to represent in embodiment 1, the table of the relation between the thickness in gap and Cr portion, and Figure 26 (b) is to represent In embodiment 1, the table of the relation between the thickness in gap and Ad portion.

Figure 27 (a) is to represent in embodiment 1, the table of the relation between the thickness in gap and Re portion, and Figure 27 (b) is to represent In embodiment 1, the figure of the relation between gap and average thickness.

Figure 28 is to represent in example 2, affects the figure of relation between the thickness of the metallic plate of bond quality and gap, its Show the situation of the thickness of the thickness=Re side of Ad side.

Figure 29 is to represent in embodiment 1, and the distance between shaft shoulder portion is fixed as each twin shaft shoulder stirring-head type during 5.8mm The size of instrument and the table of connecting state.

Figure 30 is to represent in example 2, and the distance between shaft shoulder portion is fixed as each twin shaft shoulder stirring-head type during 2.8mm The size of instrument and the table of connecting state.

Figure 31 is to represent in reference example, and the distance between shaft shoulder portion is fixed as each twin shaft shoulder stirring-head type during 11.5mm The size of instrument and the table of connecting state.

Figure 32 is to represent in embodiment 3, the impact (gap of docking section that the difference of height of metallic plate is brought by screw thread ratio For 0mm) figure.

Figure 33 is to represent in embodiment 3, the impact (gap of docking section that the difference of height of metallic plate is brought by screw thread ratio For 1.5mm) figure.

Figure 34 is to represent in embodiment 3, in the case of the gap difference of docking section, and the plasticity of the metallic plate of condition A Change the figure in region.

Figure 35 is to represent in embodiment 3, in the case of the gap difference of docking section, and the plasticity of the metallic plate of condition B Change the figure in region.

Figure 36 is to represent in embodiment 3, in the case of the gap difference of docking section, and the plasticity of the metallic plate of condition C Change the figure in region.

Figure 37 is to represent in embodiment 3, in the case of the gap difference of docking section, and the plasticity of the metallic plate of condition D Change the figure in region.

Figure 38 is to represent in embodiment 3, in the case of the gap difference of docking section, and the plasticity of the metallic plate of condition E Change the figure in region.

Figure 39 is the table after the result of embodiment 3 being collected.

Figure 40 is the table after twin shaft shoulder stirring-head type instrument being made to collect towards situation during anticlockwise.

Figure 41 is engaging form or the front view of docking form representing embodiment 4, and wherein, Figure 41 (a) represents type I, Figure 41 (b) represents Type II, and Figure 41 (c) represents type-iii.

Figure 42 is the figure of the result of the angular deformation of type I representing embodiment 4.

Figure 43 is the figure of the result of the angular deformation of the Type II representing embodiment 4.

Figure 44 is the figure of the result of the angular deformation of the type-iii representing embodiment 4.

Figure 45 is by the direction of rotation of twin shaft shoulder stirring-head type instrument of embodiment 4, spiral fluted coiling direction, engaging Form collect after table.

Figure 46 is intended to indicate that the figure of embodiment 6, and Figure 46 (a) represents body to be tested, Figure 46 (b) be each condition is collected after Table.

Figure 47 is the figure of the thickness of slab a representing embodiment 6 and the incidence relation of length c.

Detailed description of the invention

[embodiment 1]

Hereinafter, referring to the drawings, embodiments of the present invention are described in detail.As it is shown in figure 1, the rubbing of present embodiment Wiping agitating device 1 is the device that the docking section N to a pair metallic plate after docking carries out friction-stir joint.At friction-stir The front end of device 1 is provided with twin shaft shoulder stirring-head type instrument 5.First, a pair metallic plate to be engaged is illustrated.Say Upper and lower, front, rear, left and right in bright are according to the direction of arrow of Fig. 1.

As shown in Fig. 2 (a), in the present embodiment, exemplified with hollow material 100A and hollow material 100B engaged Situation.Hollow material 100A is the extrded material of aluminium alloy, and is the strip structure of the hollow bulb 100a with rectangular in cross-section Part.Hollow material 100A has and includes the main part 101 of hollow bulb 100a, from the left surface upper and lower side court respectively of main part 101 The plate-shaped end 102,103 that left side (hollow material 100B side) is stretched out.

Main part 101 is made up of four face materials 104,105,106,107, and its cross section is formed as rectangle.Plate-shaped end 102,103 is plate-shaped, and is perpendicular to face material 105.The one of a length of the material 104 of left and right directions of plate-shaped end 102,103 Half left and right.Additionally, the thickness of plate-shaped end 102,103 is identical with the thickness of face material 104,105,106,107.Plate-shaped end 102, the position of 103 " metallic plates " being comparable in claims.

Hollow material 100B is to have and the hardware of hollow material 100A same shape.Hollow material 100B mark with The symbol that hollow material 100A is identical, and detailed.

When hollow material 100A docks with hollow material 100B, make the plate-shaped end 102,103 points of hollow material 100A Do not dock with the plate-shaped end 102,103 of hollow material 100B.In more detail, the plate-shaped end 102 of hollow material 100A is made The end face 102a of plate-shaped end 102 of end face 102a and hollow material 100B dock, make the plate-shaped end of hollow material 100A The end face 103a of the plate-shaped end 103 of the end face 103a and hollow material 100B of 103 docks.As shown in Fig. 2 (b), make hollow When section bar 100A docks with hollow material 100B, the center of the short transverse of end face 102a, 102a overlaps each other, and, tabular Each upper surface flush of end 102,102, each lower surface of plate-shaped end 102,102 flushes.

As shown in Fig. 2 (b), the part by making end face 102a and end face 102a, after end face 103a docks with end face 103a claims For " docking section N ".When being engaged by docking section N, preferably make end face 102a and end face 102a be in close contact, but sometimes because of The frictional heat when tolerance of hollow material 100A, 100B or joint, makes plate-shaped end 102,102 deform, and at end face Tiny gap is produced between 102a and end face 102a.Docking section N be include producing between end face 102a and end face 102a tiny between The situation of gap is in interior concept.

It addition, in the present embodiment, exemplified with using the plate-shaped end of hollow material as object to be engaged, but institute Object to be engaged is formed by the metal of energy friction-stir, as long as plate-shaped component, is not particularly limited.

<friction-stir device>

As it is shown on figure 3, friction-stir device 1 is mainly by chuck portion 1a be fixed on the throw list within chuck portion 1a Unit 2 is constituted.As shown in Figure 4, chuck portion 1a is the cylindrical structural member including flange, and use screw B1 and with friction-stir device Main body D of 1 connects.Chuck portion 1a is the position pivoted by the driving rotation of friction-stir device 1.At chuck portion 1a Inner circumferential be formed with barrel surface 1b.

As shown in Figure 4, throw unit 2 by keeper 3, sliding axle 4, twin shaft shoulder stirring-head type instrument 5 and slides Element 6 is constituted.Throw unit 2 can be relative to the 1a mounting or dismounting of chuck portion.

Keeper 3 is to be built-in with sliding axle 4 and be fixed on the component within chuck portion 1a.Keeper 3 is cylindrically.Protecting The outer surface of gripping member 3 is formed along the most extended tabular surface 3a of above-below direction, therefore, barrel surface 1b and tabular surface Tiny gap is formed between 3a.Bolt 2B, 2B fasten towards radial direction from the outer surface of chuck portion 1a, its front end and tabular surface 3a abuts.Thereby, chuck portion 1a rotates integratedly with keeper 3.Additionally, as it is shown in figure 5, keeper 3 is formed and radially passes through The keyway 3b of logical elongated hole-shape.

As shown in Figure 4, cylindrically, it is arranged in the component of hollow bulb of keeper 3 to sliding axle 4.Sliding axle 4 is relative Can move in the vertical direction in keeper 3.As it is shown in figure 5, the outer surface at sliding axle 4 is formed with the key being projected toward the outside 4a.Key 4a engages with keyway 3b, and thereby, keeper 3 rotates integratedly with sliding axle 4.

As shown in Figure 6, twin shaft shoulder stirring-head type instrument 5 is such as formed by tool steel, and is connected with sliding axle 4.Twin shaft Shoulder stirring head dummy instrument 5 and chuck portion 1a, keeper 3 and sliding axle 4 are integratedly towards the rotation of both forward and reverse directions.Twin shaft shoulder stirs Mix head dummy instrument 5 have the first shaft shoulder portion 11, in the lower section in the first shaft shoulder portion 11 across spaced second shaft shoulder portion 12, will The pin 13 that first shaft shoulder portion 11 and the second shaft shoulder portion 12 link.

First shaft shoulder portion 11 and the second shaft shoulder portion 12 are cylindrical, and have identical external diameter.Pin 13 is cylindrical, and will First shaft shoulder portion 11 links with the second shaft shoulder portion 12.Through second shaft shoulder portion 12 of pin 13.The pin 13 in through second shaft shoulder portion 12 exists The lower end in the second shaft shoulder portion 12 is fastened by nut.Outer peripheral face at pin 13 is carved with top helicla flute 13a and lower part helical groove 13b.The groove direction of top helicla flute 13a and lower part helical groove 13b is carved in the way of the direction winding that towards each other is contrary and is set.

Top helicla flute 13a carves the centre position of the short transverse set to pin 13 from the lower end of the first shoulder axle 11.In this reality Execute in mode, make twin shaft shoulder stirring-head type instrument 5 towards right rotation, therefore, top helicla flute 13a shape in the way of right-hand thread Become.It is to say, top helicla flute 13a is to carve to set in the way of winding towards right side from the top down.

On the other hand, lower part helical groove 13b carves the interposition of the short transverse set to pin 13 from the upper end of the second shoulder axle 12 Put.In the present embodiment, making twin shaft shoulder stirring-head type instrument 5 towards right rotation, therefore, lower part helical groove 13b is with left-hand thread Mode formed.It is to say, lower part helical groove 13b is to set towards carving in the way of left winding from the top down.

By top helicla flute 13a formed as discussed above and lower part helical groove 13b, rubbed stirring and after Plastic Flow Metal will be somewhat shifted from the middle body of the short transverse of plate-shaped end 102 extreme direction upward or lower extreme direction.It addition, The above-mentioned metal towards above-below direction move with make because of the rotation of the pin 13 of twin shaft shoulder stirring-head type instrument 5 metal in the circumferential direction On movement compare, only trace.

For spiral fluted coiling direction or carved the ratio set, if according to the decorative cover of metallic plate to be engaged with The position relationship of twin shaft shoulder stirring-head type instrument 5, the direction of rotation etc. of twin shaft shoulder stirring-head type instrument suitably set ?.In the present embodiment, though pin 13 is provided with right-hand thread and left-hand thread both helicla flutes quarter but it also may complete to pin 13 The helicla flute setting right-hand screw is carved in portion, or all carves the helicla flute setting left-hand screw.Additionally, in the present embodiment, though first Side, shaft shoulder portion 11 is carved and is set right-hand thread, carves in the second side, shaft shoulder portion 12 and sets left-hand thread but it also may carves in the first side, shaft shoulder portion 11 and sets Left-hand thread, carves in the second side, shaft shoulder portion 12 and sets right-hand thread.

As shown in Figure 6, it may be desirable to, make the distance Z (pin 13 between the shaft shoulder portion of twin shaft shoulder stirring-head type instrument 5 Length) with the thickness T-phase of the plate-shaped end 102 of hollow material 100A with or plate-shaped end 102 than hollow material 100A Thickness T is little.Such as, in the present embodiment, the thickness T of the plate-shaped end 102 than hollow material 100A of distance Z between shaft shoulder portion Little 0.2mm.

It addition, the gap of end face 102a, 102a of docking section N (with reference to Fig. 2 (b)) can be set as below 0.75mm's In the case of, even if the thickness T of plate-shaped end 102 is set as identical with spacing Z in shaft shoulder portion, i.e. T-Z=0, it is also possible to obtain Good engagement state.

Additionally, in the case of the gap of end face 102a, 102a of docking section N being set as below 1.00mm, more It is desirable that spacing Z of the thickness T of plate-shaped end 102 Yu shaft shoulder portion is set as 0.2mm≤T-Z≤0.8mm.

The gap of end face 102a, 102a of docking section N can be set greater than 1.00mm and the feelings for below 1.75mm Under condition, it may be desirable to, spacing Z of the thickness T of plate-shaped end 102 Yu shaft shoulder portion is set as 0.4mm≤T-Z≤ 0.8mm。

Additionally, it is preferable that, twin shaft shoulder stirring-head type instrument 5 is set to and makes the first shaft shoulder portion 11 and the second axle The square value of the external diameter X of shoulder 12 is bigger than 2.0 divided by the value after the square value of the external diameter Y of pin 13.According to above-mentioned twin shaft shoulder Stirring head dummy instrument 5, can utilize the first shaft shoulder portion 11 and the second shaft shoulder portion 12 to suppress the quantity of material discharged as burr, because of This, can reduce the generation of joint defect.

Additionally, it is preferable that, twin shaft shoulder stirring-head type instrument 5 is set to first shaft shoulder portion 11 and second shaft shoulder The value that the square value of the external diameter X in portion 12 obtains after deducting the square value of the external diameter Y of pin 13, and make the square value of the external diameter Y of pin 13 Bigger than 0.2 divided by the value after value obtained above.According to above-mentioned twin shaft shoulder stirring-head type instrument 5, it is possible to guarantee fully During joint, pin is relative to the tensile resistence of the material resistance upwards produced at tool shaft, accordingly, it is capable to the breakage of anti-shotpin 13.

Additionally, it is preferable that, twin shaft shoulder stirring-head type instrument 5 is set to the square value of the external diameter Y making pin 13 Take advantage of the value after distance Z between shaft shoulder portion bigger than 1.2 divided by the external diameter Y of pin 13.According to above-mentioned twin shaft shoulder stirring-head type instrument 5, it is possible to when substantially ensuring that joint, pin is relative to the fracture resistence force of the material resistance along the direction flowing contrary with instrument direct of travel, Accordingly, it is capable to the breakage of anti-shotpin 13.For above-mentioned basis, will be recorded in an embodiment.

As shown in Fig. 3 (b) and Fig. 4, sliding members 6 is to make sliding axle 4 relative to keeper 3 the most swimmingly The mechanism of movement.Sliding members 6 by the bearing groove 8 on the inner surface being formed at keeper 3 and in bearing groove 8 slide ball axle Hold 9 compositions.As shown in Fig. 3 (b), bearing groove 8 the inner surface section bar of keeper 3 be side-looking be long round shape.The degree of depth of bearing groove 8 Less than the diameter of ball bearing 9.Ball bearing 9 is configured with multiple in the inside of bearing groove 8.Outside one end of ball bearing 9 is with sliding axle 4 Slidably contact the surfaces, and the inner surface sliding contact of the other end and bearing groove 8.

It addition, the structure of sliding members 6 is not limited to the structure of present embodiment.As long as sliding members 6 is configured to make Keeper 3 and sliding axle 4 rotate integratedly, and make sliding axle 4 move the most swimmingly i.e. relative to keeper 3 Can.For example, it is also possible to arrange bearing groove 8 and ball bearing 9 in sliding axle 4 side.

Here, when carrying out friction-stir and engaging, make because of frictional heat sometimes in the temperature of plate-shaped end 102,102 Rise, and make plate-shaped end 102,102 upward or lower section warpage.In the friction-stir device 1 of present embodiment, owing to sliding Axle 4 is formed to move relative to keeper 3, and therefore, when plate-shaped end 102 is towards warpage above such as, twin shaft shoulder stirs Head dummy instrument 5 can move predetermined distance upward along with above-mentioned warpage.On the other hand, in plate-shaped end 102 warpage downward Time, twin shaft shoulder stirring-head type instrument 5 can move predetermined distance downward along with above-mentioned warpage.Thereby, it is possible to suppression is rubbing Twin shaft shoulder stirring-head type instrument 5 during stirring engages of wiping offsets relative to the position of metallic plate.

Then, the joint method of the twin shaft shoulder stirring-head type instrument 5 using embodiment 1 is illustrated.

In the joint method of embodiment 1, make twin shaft shoulder stirring-head type instrument 5 transfer towards dextrorotation and engage.Tool For body, in this joint method, the docking operation that carries out making hollow material abut each other and by twin shaft shoulder stirring-head type Instrument 5 inserts the bonding process of docking section N.Here, surface Sa is set as decorative cover.

In docking operation, as in figure 2 it is shown, make the plate-shaped end 102 of hollow material 100A and hollow material 100B each other Relatively, end face 102a and end face 102a, end face 103a is made to contact with end face 103a face.In more detail, so that the end face of a side The midpoint of 102a contacts with the mode face of the midpoint overlap of the end face 102a of the opposing party.After docking, can pass through along docking section N The modes such as welding engage temporarily, and make hollow material 100A not separated with hollow material 100B.Make hollow material 100A After docking with hollow material 100B, both are fixed and makes it immovable.

In bonding process, first, in the outside of docking section N, the center 13c of pin 13 is made to be positioned at and the center of docking section N The position that Nc is overlapping.Then, as it is shown in fig. 7, make the twin shaft shoulder stirring-head type instrument 5 of right rotation move along docking section N.? After twin shaft shoulder stirring-head type instrument 5 inserts docking section N, utilize the pin 13 of high speed rotating that the metal around pin 13 is rubbed Stirring, and make integration between plate-shaped end 102.The track of pin 13 is formed plastification region W.

The joint method of present embodiment from the description above, even if making tabular because of the frictional heat of friction-stir joint End (metallic plate) 102,102 warpage, twin shaft shoulder stirring-head type instrument 5 is the most suitable as well as above-mentioned warpage Freely mobile.Thereby, it is possible to the height and position of the center Nc of the center 13c and docking section N of suppression pin 13 offsets.Therefore, Can prevent bonding station from offseting.

Additionally, as in the present embodiment, by distance Z between the shaft shoulder portion of twin shaft shoulder stirring-head type instrument 5 is set It is set to below the thickness T of plate-shaped end 102, it becomes possible to the metal of Plastic Flow is pressed, accordingly, it is capable to prevent because of friction Stirring and the metal of Plastic Flow is spilled over to the first shaft shoulder portion 11 and outside in the second shaft shoulder portion 12.Thereby, it is possible to suppression connects Close the generation of defect.If it addition, the value of T-Z is more than 0.8, then can increase the load to friction-stir device 1, therefore, not conform to Suitable.

Additionally, according to joint method, rubbed stirring and the metal of liquidation are by the top helicla flute of the right-hand thread of pin 13 Lower part helical groove 13b of 13a and left-hand thread guides, and from the center Nc of plate-shaped end 102 respectively towards Sa side, surface and back side Sb Side shifting.Owing to the top helicla flute 13a of right-hand thread is formed with the ratio of more than 25%, therefore, above-mentioned helicla flute cause Metal moves and twin shaft shoulder stirring-head type instrument 5 can be made to promote towards sliding axle 4 side (top) relative to plate-shaped end 102, can prevent Only enter too far into surface (decorative cover) Sa.Thereby, can prevent decorative cover produce groove V, even if or produce groove V also can Reduce the degree of depth of groove V.By preventing groove V from producing or reducing the degree of depth of groove V, so that it may easily carry out making surface Polish smoothened for (decorative cover) Sa processes.

Additionally, in embodiment 1, top helicla flute 13a is 50:50 with the ratio of lower part helical groove 13b, therefore, as Shown in Fig. 7 (a), it is possible to make the amount of metal moved in the upper side and lower side impartial.Thereby, can the center 13c of further anti-shotpin 13 Position skew with the center Nc of docking section N.It is provided with top helicla flute 13a and lower part helical groove 13b additionally, due to carve, therefore, The stirring efficiency of friction-stir can be improved.

When carrying out bonding process, it may be desirable to, at the gas such as utilized after supplying cooling or liquid etc. Chiller engages while cooling down surface (decorative cover) Sa of plate-shaped end 102.Thereby, it is possible to suppression tabular The deformation of end 102 and make joining accuracy improve.Alternatively, it is also possible to the Sb side, the back side of plate-shaped end 102 cooled down Engage simultaneously.

[embodiment 2]

In the joint method of embodiment 2, the spiral fluted structure of twin shaft shoulder stirring-head type instrument and direction of rotation Different from embodiment 1.In the explanation of embodiment 2, for the point identical with embodiment 1, detailed.

Fig. 8 is the side view of the twin shaft shoulder stirring-head type instrument representing embodiment 2.As shown in Figure 8, at embodiment The outer peripheral face of the pin 13 of the twin shaft shoulder stirring-head type instrument 5A of 2 carves the top helicla flute being provided with the left-hand thread being formed at the first half 13a and be formed at lower part helical groove 13b of right-hand thread of lower half.It is to say, top helicla flute 13a is with from the top down towards a left side The mode of winding is carved and is set, and lower part helical groove 13b is to set towards carving in the way of right winding from the top down.

It is preferable that, during distance (length of the pin 13) Z between the shaft shoulder portion of twin shaft shoulder stirring-head type instrument 5A is Below the thickness of slab T of the plate-shaped end 102 of casement material 100A.Such as, in the present embodiment, distance Z between shaft shoulder portion compares hollow The little 0.4mm of thickness of slab T of the plate-shaped end 102 of section bar 100A.

Then, the joint method of the twin shaft shoulder stirring-head type instrument 5A using embodiment 2 is illustrated.

In the joint method of embodiment 2, as it is shown in figure 9, make twin shaft shoulder stirring-head type instrument 5A transfer towards left-handed Engage.Specifically, in above-mentioned joint method, the docking operation that carries out making hollow material abut each other and by double-shaft shoulder Portion stirring head dummy instrument 5A inserts the bonding process of docking section N.Here, surface Sa is set as decorative cover.Due to docking operation Identical with embodiment 1, therefore, omit the description.

In bonding process, first, in the outside of docking section N, the center 13c of pin 13 is made to be positioned at and the center of docking section N The position that Nc is overlapping.Then, as it is shown in figure 9, make the twin shaft shoulder stirring-head type instrument 5A of anticlockwise move along docking section N. After twin shaft shoulder stirring-head type instrument 5A is inserted docking section N, utilize the pin 13 of high speed rotating that the metal around pin 13 is entered Row friction-stir, and make plate-shaped end 102 be integrated with each other.The track of pin 13 is formed plastification region W.

According to above-mentioned joint method, rubbed stirring and the metal of liquidation are by the top helicla flute of the left-hand thread of pin 13 Lower part helical groove 13b of 13a and right-hand thread guides, and from the center Nc of plate-shaped end 102 respectively towards Sa side, surface and back side Sb Side shifting.Owing to the top helicla flute 13a of left-hand thread is formed with the ratio of more than 25%, therefore, helicla flute the metal caused Movement can make twin shaft shoulder stirring-head type instrument 5A promote towards sliding axle 4 side (top) relative to plate-shaped end 102, can prevent Deeply enter surface (decorative cover) Sa.Thereby, can prevent from producing groove V on decorative cover Sa, even if or being formed with groove V Also the degree of depth of groove V can be reduced.

Additionally, in embodiment 2, top helicla flute 13a is 50:50 with the ratio of lower part helical groove 13b, accordingly, it is capable to The amount of metal enough making movement is impartial.Thereby, can the position of center Nc of center 13c and docking section N of further anti-shotpin 13 inclined Move.It is provided with top helicla flute 13a and lower part helical groove 13b, accordingly, it is capable to improve the stirring efficiency of friction-stir additionally, due to carve.

In variation 1, as shown in Figure 10 (a), at plate-shaped end 102A this point different from the thickness of plate-shaped end 102B On, different from the embodiment described above.The thickness T1 of the plate-shaped end 102B thickness T2 than plate-shaped end 102A is thick.In variation 1 In, by plate-shaped end 102A and plate-shaped end 102B so that the midpoint in the short transverse of plate-shaped end 102A and plate-shaped end The mode of the midpoint overlap in the short transverse of 102B is docked.

In the docking operation of variation 1, make twin shaft shoulder stirring-head type instrument 5 towards right rotation, by plate-shaped end 102B The bigger plate-shaped end 102B (metallic plate) of the thickness of docking section N be arranged in the left side of direct of travel.

When friction-stir, making throw towards in the case of right rotation, the metal of Plastic Flow has from instrument Advance towards instrument in the left side (shearing side: the rotary speed of throw is plus the translational speed side of throw) of direct of travel The trend flowed in the right side (flow side: the rotary speed of throw deducts the translational speed side of throw) in direction, because of This, it is assumed that have gap between metallic plate, then above-mentioned gap can be filled by the metal shearing side.Thus, if shearing the gold of side Belong to plate thickness little, then there is the trend that metal is not enough and the central part thickness in plastification region after making joint diminishes.It addition, Making throw towards in the case of anticlockwise, the right side of instrument direct of travel is for shearing side, and left side is flow side.

In variation 1, by making to be positioned at thick than plate-shaped end 102A of the thickness T1 of the plate-shaped end 102B shearing side Degree T2 is thick, it becomes possible to the metal of the central part eliminating plastification region W is not enough, and makes joint more preferable.

In variation 2, as shown in Figure 10 (b), at plate-shaped end 102C this point different from the thickness of plate-shaped end 102D On, different from the embodiment described above.The thickness T1 of the plate-shaped end 102C thickness T2 than plate-shaped end 102D is thick.In variation 2 In, by plate-shaped end 102C and plate-shaped end 102D so that the midpoint in the short transverse of plate-shaped end 102C and plate-shaped end The mode of the midpoint overlap in the short transverse of 102D is docked.

In the docking operation of variation 2, make twin shaft shoulder stirring-head type instrument 5 towards anticlockwise, by plate-shaped end 102C The bigger plate-shaped end 102C (metallic plate) of the thickness of docking section N be arranged in the right side of direct of travel.

In variation 2, utilize the principle identical with variation 1, make to be positioned at the thickness of the plate-shaped end 102C shearing side The T1 thickness T2 than plate-shaped end 102D is thick, it becomes possible to the metal of the central part eliminating plastification region W is not enough, and makes joint more Preferable.

As shown in Figure 11 (a), Figure 11 (b), the throw unit of variation 3 includes keeper 50, sliding axle 51, slides Element 52 and twin shaft shoulder stirring-head type instrument 5.The mainly structure of keeper 50 and sliding axle 51 has with the first embodiment Institute is different.

Keeper 50 is made up of with the collar part 54 being formed at lower end, main body cylinder portion 53 main body cylinder portion 53.Main body cylinder portion 53 in Cylindric.As shown in Figure 11 (b), the inner surface in main body cylinder portion 53 is formed with raised line 53a, 53a prominent towards inner side.Raised line 53a, 53a are formed on relative position.The cross section of raised line 53a is substantially semi-circular shape, and in the height side in main body cylinder portion 53 Formed in length range upwards.

The cross section of collar part 54 is L-shaped, overlooks in the form of a ring, and engages with the lower end in main body cylinder portion 53.Collar part 54 is wrapped Include the limiting section 54a stretched out than the inner surface in main body cylinder portion 53 more towards inner side.

Sliding axle 51 include large-diameter portion 55, the minor diameter part 56 being arranged on the bottom of large-diameter portion 55, by large-diameter portion 55 and path The stage portion 57 that portion 56 is formed.As shown in Figure 11 (b), the outer surface at large-diameter portion 55 is formed corresponding with raised line 53a recessed Bar 55a, 55a.Recessed bar 55a has and raised line 53a same shape, and the total length model in the short transverse of large-diameter portion 55 Enclose interior formation.

Sliding members 52 has and embodiment 1 same structure, as shown in Figure 11 (b), have bearing groove 52a and Ball bearing 52b.Sliding members 52 makes sliding axle 51 move the most swimmingly relative to keeper 50.

By being engaged with the recessed bar 55a of sliding axle 51 by the raised line 53a of keeper 50, shifting in the axial direction can not only be allowed Dynamic, and keeper 50 can be made to rotate integratedly with sliding axle 51.Owing to raised line 53a is formed at the short transverse of keeper 50 In total length, accordingly, it is capable to increase the displacement of sliding axle 51.Additionally, due to the total length of raised line 53a engages with recessed bar 55a, because of This, can make sliding axle 51 stably move.Additionally, due to raised line 53a and recessed bar 55a clips rotating shaft and is arranged on both sides, accordingly, it is capable to More stably move.Additionally, by making limiting section 54a abut with the stage portion 57 of sliding axle 51, just can limit slippage axle 51 court Lower section is mobile.

It addition, in embodiment 1, embodiment 2, variation 1～variation 3, throw configured as described above Unit, but it is not limited to this.For example, it is also possible to making the horizontal cross sectional geometry of keeper and sliding axle is polygon.

[embodiment 3]

Hereinafter, embodiment of the present invention 3 is illustrated.In embodiment 3, double face slab is engaged by illustration Situation.Up, down, left, right, before and after in description of the present embodiment is according to the arrow of Figure 12.

As shown in figure 12, double face slab 201 is metal slim strip component, its mainly by outside plate 202, inner panel 203, Support plate 204,204 is constituted.Each support plate 204 is perpendicular to outside plate 202 and inner panel 203.By in the lateral direction by multiple double Deck panels 201 engages, and functions as the structure of such as rolling stock, aircraft, boats and ships, civil construction thing etc..Double face slab 201 Manufacture method has no particular limits, but, in the present embodiment, double face slab 201 is shape by the way of pressing shapes Become.As long as the metal of the material energy friction-stir of double face slab 201, it is not particularly limited, but in the present embodiment, Use aluminium alloy.

Outside plate 202 by central part 205, from the central part 205 right side plate-shaped end 210 extended towards right side and therefrom The centre portion 205 left side plate-shaped end 220 extended towards left side is constituted.

Right side plate-shaped end 210 is by the first outside plate heavy section the 211, first hook portion 212 and the first covering part (Japanese: first Meat Sheng portion) 213 compositions.First outside plate heavy section 211 is perpendicular to support plate 204, and extended towards right side.First hook portion 212 In hook-shaped, it is by first thinner wall section 214 extended towards right side and the first extension of extending perpendicularly out from the first thinner wall section 214 215 are constituted.The thickness of the first thinner wall section 214 is about 1/3rd of the first outside plate heavy section 211.

First extension 215 stretches out towards inner panel 203 side from the front end of the first thinner wall section 214.Side at the first extension 215 Portion is formed by along with just stretching out inclined plane 216 the closer to first tilted in the way of support plate 204 towards inner panel 203 side.The One covering part 213 is that the upper surface from first outside plate heavy section the 211, first thinner wall section 214 and the first extension 215 is dashed forward upward Go out certain thickness the position being formed on heavy wall.

Left side plate-shaped end 220 is main by the second outside plate heavy section the 221, second hook portion 222 and the second covering part 223 structure Become.Second outside plate heavy section 221 is perpendicular to support plate 204, and extended towards left side.Second hook portion 222 is in hook-shaped, and it is by court The second thinner wall section 224 and the second extension 225 extended vertically out relative to the second thinner wall section 224 that left side extends are constituted.The The thickness of two thinner wall section 224 is about 1/3rd of the second outside plate heavy section 221.

Second extension 225 stretches out from the front end of the second thinner wall section 224 towards the side contrary with inner panel 203.Outside second The left end of plate heavy section 221 be formed by along with towards inner panel 203 side just away from support plate 204 in the way of the second heavy wall of tilting Portion's inclined plane 226.The angle of inclination that second heavy section inclined plane 226 stretches out inclined plane 216 with first is identical.Second covering part 223 is that the upper surface from the second outside plate heavy section 221 highlights certain thickness the position being formed at heavy wall upward.

Inner panel 203 is by central part 206, from the central part 206 right side plate-shaped end 230 extended towards right side, from central authorities The portion 206 left side plate-shaped end 240 extended towards left side is constituted.

Right side plate-shaped end 230 is made up of first inner panel heavy section the 231, first covering part the 232, first end face 233.First Inner panel heavy section 231 is perpendicular to support plate 204, and extended towards right side.First covering part 232 is from the first inner panel heavy section The lower surface of the front of 231 highlights downward, and becomes the position of heavy wall.

Left side plate-shaped end 240 is made up of second inner panel heavy section the 241, second covering part the 242, second end face 243.Second Inner panel heavy section 241 is perpendicular to support plate 204, and extended towards left side.Second covering part 242 is from the second inner panel heavy section The lower surface of the front of 241 highlights downward, and becomes the position of heavy wall.

Then, the friction-stir device used in the present embodiment is illustrated.As shown in Figure 13, Figure 14, friction Agitating device 261 is made up of chuck portion 261a, the throw unit 262 that is fixed on chuck portion 261a.Same with embodiment 1 Sample ground, chuck portion 261a is engaged with the main body of friction-stir device 261 (not shown) by bolt.

Throw unit 262 is by keeper 263, sliding axle 264, twin shaft shoulder stirring-head type instrument 265 and does not schemes The sliding members shown is constituted.

As shown in figure 14, keeper 263 is to be built-in with sliding axle 264 and be arranged on the component of inside of chuck portion 261a. Keeper 263 is cylindrically.The keyway 263b of the most through elongated hole-shape it is formed with at keeper 263.

As shown in figure 14, cylindrically, it is inserted into the component in the hollow bulb of keeper 263 to sliding axle 264.Slide Axle 264 can move in the vertical direction relative to keeper 263.The outer surface of sliding axle 264 is formed towards lateral process The key 264a gone out.By making key 264a engage with keyway 263b, thereby, so that it may make keeper 263 revolve integratedly with sliding axle 264 Turn.

As shown in figure 15, twin shaft shoulder stirring-head type instrument 265 by the 252, second shaft shoulder portion 253 of the first shaft shoulder portion and sets The pin 254 put between the first shaft shoulder portion 252 and the second shaft shoulder portion 253 is constituted.First the 252, second shaft shoulder portion 253 of shaft shoulder portion, Pin 254 is all in generally a cylindrical shape, and is coaxially disposed.Twin shaft shoulder stirring-head type instrument 265 is by making pin 254 at high speed rotating While mobile bonding part, carry out the instrument of friction-stir joint.

First shaft shoulder portion 252 includes large-diameter portion 252a, tapering 252b and lower surface 252c.Tapering 252b is the most gradually Undergauge.Although not shown, the lower surface 252c but in the first shaft shoulder portion 252 is formed around overlooking in swirl shape around pin 254 Depressed part.

Second shaft shoulder portion 253 is formed as the structure at outer surface with groove.Second shaft shoulder portion 253 include large-diameter portion 253a, Tapering 253b and upper surface 253c.Tapering 253b the most gradually undergauge.The external diameter Y1 of large-diameter portion 253a is than large-diameter portion 252a External diameter X1 little.Additionally, the diameter Y2 of the diameter Y2 and lower surface 252c of upper surface 253c is identical.

Outer surface at pin 254 is carved and is provided with the helicla flute 255 formed in the way of left-hand thread.It is to say, helicla flute 255 To set towards carving in the way of anticlockwise from the top down.External diameter U diameter group X2 of pin 254 and diameter Y2 are little.First shaft shoulder portion 252 passes through Nut is connected with sliding axle 264.

It is preferable that, the distance (length of pin 254) between the shaft shoulder portion of twin shaft shoulder stirring-head type instrument 265 sets Thickness of slab for part to be engaged (is the first outside plate heavy section 211 and thickness of the first covering part 213 in the present embodiment Total) below.If the material of the metallic plate that the degree of depth of the groove of helicla flute 255 or spacing etc. are according to friction-stir to be carried out Or the distance etc. between the thickness of slab of part to be engaged, shaft shoulder portion is appropriately configured.

Sliding members (not shown) is formed between keeper 263 and sliding axle 264, and can make sliding axle 264 relative to Keeper 263 moves up and down swimmingly.Sliding members due to identical with embodiment 1, therefore detailed.

In friction-stir device 261, owing to sliding axle 264 is formed to move relative to keeper 263, therefore, rub Wipe agitating device 261 and be configured to when metal plate to be engaged such as warpage upward, twin shaft shoulder stirring-head type instrument 265 Predetermined distance can be moved upward along with above-mentioned warpage.On the other hand, friction-stir device 261 is configured at gold to be engaged When belonging to plate warpage downward, twin shaft shoulder stirring-head type instrument 265 can move predetermined distance downward along with above-mentioned warpage.Mat This, it is possible to when suppression friction-stir engages, twin shaft shoulder stirring-head type instrument 265 offsets relative to the position of metallic plate.

Then, the joint method of the double face slab of present embodiment is illustrated.Here, illustrate two pieces of same shapes Double face slab 201 be arranged side by side after carry out situation about engaging.In above-mentioned joint method, it is prepared operation and engages work Sequence.

In preparatory process, as shown in figure 16, make double face slab 201,201 to fetch formed double face slab assembly, And fix this assembly and make it immovable.In explanation, the double face slab of a side is labeled as " 201A ", double by the opposing party Deck panels is labeled as " 201B ", for self-corresponding key element each with above-mentioned double face slab, can add that symbol " A ", symbol " B " enter Row difference.

In preparatory process, specifically, the of first hook portion 212A of double face slab 201A and double face slab 201B is made Two hook portion 222B engagings, and make the first end face 233A and the second end face 243B docking.Thereby, the first hook portion 212A and the second hook Portion 222B engages very close to each otherly, forms holding section M.On the other hand, after the first end face 233A and the second end face 243B docking, shape Become docking section N.The position that extension 215A is engaged with extension 225B and the first end face 233A and the second end face 243B docking Position extended line be referred to as " centrage C ".

After being prepared operation, the upper surface of the first covering part 213A and the upper surface flush of the second covering part 223B, Meanwhile, the lower surface of the first outside plate heavy section 211A and the lower surface of the second outside plate heavy section 221B flush.Additionally, the first inner panel The upper surface of heavy section 231A and the lower surface of the second inner panel heavy section 241B flush, meanwhile, and the following table of the first covering part 232A Face flushes with the lower surface of the second covering part 242B.After the assembly forming double face slab, fixture is used to fix this assembly Make it immovable.

In bonding process, as shown in figure 17, twin shaft shoulder stirring-head type instrument 265 is used to be engaged by holding section M First bonding process and the second bonding process that docking section N is engaged.

In the first bonding process, double face slab 201A is made to be arranged in the left side of direct of travel.Then, by towards right rotation The center alignment of the short transverse of the holding section M on the Center-to-Center line C of the pin 254 of twin shaft shoulder stirring-head type instrument 265 After, insert holding section M.Then, friction-stir joint is carried out from front side towards rear side along holding section M.It addition, at holding section M On the track that moves along twin shaft shoulder stirring-head type instrument 265 be formed with plastification region W1 (with reference to Figure 18).

In the second bonding process, as shown in figure 18, after the first bonding process terminates, the assembly of double face slab is turned over Come over, and the assembly again fixing double face slab makes it immovable.Then, by the twin shaft shoulder stirring-head type towards right rotation After the center alignment of the short transverse of the docking section N on the Center-to-Center line C of the pin 254 of instrument 265, insert docking section N.Connect , carry out friction-stir joint from front side towards rear side along docking section N.Along twin shaft shoulder stirring-head type on the N of docking section The track that instrument 265 moves is formed with plastification region (not shown).By above operation, outside plate 202A connects with outside plate 202B Close, and inner panel 203A engages with inner panel 203B.

The friction stirring connecting method of present embodiment from the description above, by making first hook portion of outside plate 202A Second hook portion 222B of 212A and outside plate 202B engages, it is possible to prevent from simply carrying out double face slab 201A when friction-stir engages Separate with double face slab 201B.On the other hand, it is not provided with hook portion at inner panel 203A and inner panel 203B, and makes the first end face 233A Dock, thereby with the second end face 243B, it is possible to the manufacture making preparatory process or double face slab is more laborsaving.Double face slab 201A, In the case of 201B is strip, if inner panel 203A and inner panel 203B is also provided with hook portion, then the operation of engaging can be made to become difficulty, but According to present embodiment, engaging operation can be made to become easy.

Additionally, in preparatory process, when making the first hook portion 212A and the engaging of the second hook portion 222B, it is possible to make first to stretch out Inclined plane 216A and the second main body inclined plane 226B engage while sliding, and therefore, make engaging operation become easy.Tool For body, when putting down double face slab 201A from the top of placed double face slab 201B, as long as making first to stretch out inclined plane 216A and the second main body inclined plane 226B are slided, it becomes possible to make first to stretch out inclined plane 216A and the second main body inclined plane 226B card Close.

Additionally, by arranging the first extension 215A and the second extension 225B, it becomes possible to block with simple structure Close.Additionally, by arranging covering part (213A, 223B, 232A, 242B), it becomes possible to when preventing friction-stir from engaging, metal is not enough. In the present embodiment, it is provided with the helicla flute 255 of left-hand thread at pin 254 quarter, and makes twin shaft shoulder stirring-head type instrument 265 in court While right rotation from front side side shifting backwards, therefore, the metal after Plastic Flow is guided by helicla flute 255, and has towards The trend that two shaft shoulder portions 253 move.Thus, by covering part (213A, 223B, 232A, 242B) is arranged on outside plate 202A, The side relative with the first shaft shoulder portion 252 in 202B and inner panel 203A, 203B, is just avoided that the gold of the first side, shaft shoulder portion 252 Belong to deficiency.

During additionally, formerly engaged by docking section N, double face slab 201A, 201B likely can separate, but in present embodiment Bonding process in, owing to first holding section M being engaged, therefore, it is possible to prevent when docking section N is engaged double face slab 201A, 201B is separately.

As long as it addition, the shape of double face slab 201A, 201B or engaging form both will not separate form, not Particularly limit.It is preferable that, as in the present embodiment, make the end of double face slab 201A, 201B flush, and do not have Engage with a gap.It is provided with the first hook portion 212,212 in addition it is also possible to formed at the two ends of the outside plate 202 of a double face slab Component, formed at the two ends of the outside plate 202 of another double face slab and be provided with the component of the second hook portion 222,222, and by above-mentioned Double face slab carries out engaging and engaging after being alternately arranged side by side.Further, it is also possible to as shown in figure 19, make the first extension 215A and The sidepiece of the second extension 225B is the shape being not provided with tilting.Additionally, in the present embodiment, though support plate 204 is with outward Plate 202 and inner panel 203 are vertically formed but it also may be to tilt.

Use the friction-stir device 1 (twin shaft shoulder stirring-head type instrument 5) of embodiment 1, carry out for to enter What kind of engagement state brought by thickness and the metallic plate gap each other of the metallic plate (plate-shaped end) that row friction-stir engages Impact carries out the test investigated.As shown in figure 20, for the test body (material of a pair metallic plate of friction-stir joint to be carried out Material A6063-T5) so that it is thickness changes respectively and prepares test body H1～H19." Ad side " refers to twin shaft shoulder stirring-head The side that the direction of rotation of type instrument is identical with direct of travel.During it is to say, twin shaft shoulder stirring-head type instrument is towards right rotation Refer to the left side of direct of travel." Re side " refers to that the direction of rotation of twin shaft shoulder stirring-head type instrument is contrary with direct of travel Side.It is to say, refer to the right side of direct of travel when twin shaft shoulder stirring-head type instrument is towards right rotation.

In test body H1～H7, make metal thickness identical in Ad side and Re side.In test body H8～H13, by Ad side Plate thickness is fixed as 6.0mm, makes Re side plate thickness change.In test body H14～H19, by Re side metal Plate thickness is fixed as 6.0mm, makes Re side plate thickness change.

Gap between metallic plate changes 0.25mm between 0～2.0mm every time.The twin shaft shoulder stirring used in test The shaft shoulder portion external diameter (diameter in the face contacted with metallic plate in shaft shoulder portion) of head dummy instrument is set as that 20mm, pin external diameter set For 12mm, the distance between shaft shoulder portion is set as 5.8mm.The speed setting of twin shaft shoulder stirring-head type instrument is 800rpm, mobile Speed is set as that 600/min, direction of rotation are set as towards right rotation.Additionally, as described in embodiment 1, above-mentioned double-shaft shoulder Portion's stirring head dummy instrument is that the height and position of twin shaft shoulder stirring-head type instrument can change along with the warpage of metallic plate Form.After carrying out friction-stir joint, judge bond quality from X-ray penetration test and cross section micro-assembly robot.

Figure 21 is to represent in embodiment 1, the figure of the relation between the gap of test body H1 and the thickness at junction surface.Figure 22 is Represent in embodiment 1, the figure of the relation between the gap of test body H3 and the thickness at junction surface.The junction surface of embodiment 1 be with Plastification region W identical meanings in embodiment.Additionally, " the Ad portion ", " Cr portion " at the junction surface of embodiment 1, " Re portion " table The Ad portion at junction surface (plastification region W) shown in diagram 7 (b), central part, each position in Re portion.

As shown in figure 21, when the thickness of metallic plate is the most all set as that 6.0mm engages, if gap is not enough 0.75mm, Ad portion, Cr portion, Re portion the minimizing of thickness the least, if but gap is more than 0.75mm, along with gap increases, Ad Portion, Cr portion, the thickness in Re portion all reduce.Once gap is more than 1.2mm, then the thickness at junction surface produces joint less than 5.8mm Defect.

As shown in figure 22, when the thickness of metallic plate is the most all set as that 6.4mm engages, if gap is not enough 0.75mm, Ad portion, Cr portion, Re portion the minimizing of thickness the least.If gap is 0.75～1.75mm, Ad portion, Cr portion, Re portion Although thickness all can reduce, but do not produce joint defect.Once gap reaches 2.0mm, then the thickness at junction surface can be significantly Reduce and produce joint defect.

Knowable to Figure 21 and Figure 22, if the thickness in the Cr portion at junction surface is below 5.8mm, then can produce joint defect.Also That is, even if metallic plate exists gap each other, as long as supplying metal by Plastic Flow, so that the thickness in the Cr portion at junction surface Degree will not be less than the 5.8mm identical with the distance between shaft shoulder portion, it is possible to intactly engage.As known from the above, setting is needed to connect Conjunction condition, so that the thickness in junction surface (plastification region) is more than the distance between shaft shoulder portion.

Figure 23 is to represent in embodiment 1, affects the table of relation between the plate thickness of bond quality and gap, and it shows Go out the situation of the thickness of the thickness=Re side of Ad side.In the drawings, "○" represents the situation that connecting state is good, and "×" represents and connects The situation that conjunction situation is bad.

According to Figure 23, even if gap increases, as long as metallic plate also increases, the most still have the feelings that connecting state is good Condition.If however, it is possible to the difference between the distance known between the thickness of metallic plate and shaft shoulder portion is more than 0.8mm (in the present embodiment, The thickness of metallic plate is bigger than 6.6mm), then the interior buckling produced between shaft shoulder portion is big, and makes the life-span of instrument be remarkably decreased.

Additionally, according to Figure 23, the distance between shaft shoulder portion is 5.8mm, the gap between metallic plate is 0～below 0.75mm Time, as long as the thickness of metallic plate is 5.8～6.6mm, then connecting state is good.As long as it is to say, by the thickness T of metallic plate and Distance Z between shaft shoulder portion is set to 0≤T-Z≤0.8mm, then connecting state is good.

In the case of T-Z value is less than 0, say, that distance Z when between shaft shoulder portion is than the thickness T of plate-shaped end 102 Time big, the metal after Plastic Flow easily overflows from the first shaft shoulder portion 11 and the second shaft shoulder portion 12 (with reference to Fig. 7 (a)), therefore, The density at junction surface (plastification region W) reduces.Thereby, the probability that joint defect produces improves.Even if metallic plate is to each other Gap be 0～0.75mm, the frictional heat that also can engage because of friction-stir and make the temperature of metallic plate increase, and because metallic plate is swollen Swollen and make gap disappear, it is therefore contemplated that connecting state is the best.

Additionally, according to Figure 23, the distance between shaft shoulder portion is 5.8mm, metallic plate gap each other is 0～1.0mm Time following, as long as the thickness of metallic plate is 6.0～6.6mm, then connecting state is good.As long as it is to say, it is known that by gold Distance Z belonged between the thickness T of plate and shaft shoulder portion is set to 0.2≤T-Z≤0.8mm, then connecting state is good.If T-Z value compares 0.2mm is little, then the metal after Plastic Flow easily overflows from the first shaft shoulder portion 11 and the second shaft shoulder portion 12, therefore, and junction surface Density reduce.Thereby, the probability that joint defect produces improves.

Additionally, according to Figure 23, the distance between shaft shoulder portion is 5.8mm, the gap between metallic plate be more than 1.0mm and During for below 1.75mm, as long as the thickness of metallic plate is 6.2～6.6mm, then connecting state is good.It is to say, it is known that As long as distance Z between the thickness T of metallic plate and shaft shoulder portion is set to 0.4≤T-Z≤0.8mm, then connecting state is good.If T-Z value is less than 0.4mm, then the metal after Plastic Flow easily overflows from the first shaft shoulder portion 11 and the second shaft shoulder portion 12, because of This, the density at junction surface reduces.Thereby, the probability that joint defect produces improves.

According to Figure 23, the distance between shaft shoulder portion is 5.8mm, and metallic plate gap each other is more than 1.75mm and to be During below 2.00mm, as long as the thickness of metallic plate is 6.6mm, then connecting state is good.As long as it is to say, it is known that by gold If spacing Z of the thickness T and shaft shoulder portion that belong to plate is set to T-Z=0.8mm, then connecting state is good.If T-Z value compares 0.8mm is little, then easily overflow from the first shaft shoulder portion 11 and the second shaft shoulder portion 12 due to the metal after Plastic Flow, therefore, make The density obtaining junction surface reduces.Thereby, the probability that joint defect produces improves.

Figure 24 is the table representing the relation between the thickness of the metallic plate affecting bond quality and gap, it illustrates and makes Ad side Thickness change and by situation fixing for the thickness of Re side.Figure 25 is thickness and the gap representing the metallic plate affecting bond quality Between the table of relation, it illustrates situation about being fixed by the thickness of Ad side and make the thickness of Rd side change.

In the test of Figure 24, the thickness of Re side is fixed as 6.0mm, and makes the thickness of Ad side suitably change, carry out Friction-stir engages.In the test of Figure 25, the thickness of Ad side is fixed as 6.2mm, and makes the thickness of Re side suitably change, come Carry out friction-stir joint.It is to say, in the test of Figure 32 and Figure 33, make the left and right of metallic plate to be docked Thickness changes, and observes the bond quality under different gap.

After being contrasted by Figure 24 and Figure 25, the good situation in Figure 24 is more.In other words, as shown in figure 32, by Re The metallic plate of side is fixed as 6.0mm, and makes the metallic plate of Ad side in the case of more than 6.2mm changes, and connecting state is good Situation is more.This be due to make in embodiment 1 twin shaft shoulder stirring-head type instrument towards right rotation, therefore, plastification flowing after Metal easily mobile towards right side (Re side) from the left side (Ad side) of direct of travel, there is the situation in gap to each other at metallic plate Under, the metal of Ad side can fill this gap.Therefore, if as the condition of Figure 25, make the thickness of metallic plate on the left of direct of travel Spend less than the plate thickness on the right side of direct of travel, then the metal of junction surface central authorities is not enough, and makes the bad probability of joint relatively High.But, if as the condition of Figure 24, make the plate thickness on the left of direct of travel than the hickness of metal plate on the right side of direct of travel Degree is big, then the metal that can supplement junction surface central authorities is not enough, accordingly, it is capable to obtain good engagement state.

Above-mentioned result also can be confirmed from Figure 26 and Figure 27.Plot point " ◆ " represents the test body H4 (thickness of Ad side =6.6mm and the thickness=6.6mm of Re side).Plot point " ■ " expression test body H10 be (thickness of Ad side=6.0mm and Re side Thickness=6.6mm), plot point "●" represents test body H16 (thickness=6.0mm of the thickness of Ad side=6.6mm and Re side).

As shown in Figure 26 (a), it is known that in the thickness in the Cr portion at junction surface, according to test body H4, H16, H10 suitable Sequence diminishes.If it is to say, it is known that the metallic plate of Ad side is thinner than Re side, then the Cr portion thickness at junction surface will diminish.

As shown in Figure 26 (b), it is known that in the thickness in the Ad portion at junction surface, test body H4, H10, H16 are About 5.8mm, and reduced than the thickness before engaging.Particularly, when viewing test body H4, H16, it is known that thickness There is considerable degree of minimizing.

As shown in Figure 27 (a), it is known that in the thickness in the Re portion at junction surface, test body H10, the thickness of H16 do not have The biggest difference, but the thickness of test body H4 is the biggest.If additionally, by Figure 26 (b) and Figure 27 (a) overall contrast, then The thickness understanding Re portion is bigger than the thickness in Ad portion generally.

As shown in Figure 27 (b), it is known that the average thickness at junction surface is increased by the order of test body H10, H16, H4.

As shown in Figure 26, Figure 27, use test body H4, H16, compared with test body 10, the thickness in Cr portion can be increased.But It is, if using test body H4, although the thickness at junction surface can be increased, but the interior buckling between shaft shoulder portion correspondingly can be made big and make work The probability of tool service life reduction improves.Therefore, by as test body H16, the thickness of the metallic plate of Ad side is set as ratio The thickness of the metallic plate of Re side is big, can not only make the intrinsic pressure reduction between shaft shoulder portion, and can increase the thickness in the Cr portion at junction surface Degree.

Use the friction-stir device 1 (twin shaft shoulder stirring-head type instrument 5) of embodiment 1, carry out for to enter What kind of engagement state brought by the thickness of the metallic plate (plate-shaped end) that row friction-stir engages and metallic plate gap each other Impact carries out the test investigated.Metallic plate gap each other changes 0.25mm between 0～2.0mm every time.Use in test The shaft shoulder portion external diameter (diameter in the face contacted with metallic plate in shaft shoulder portion) of twin shaft shoulder stirring-head type instrument be set as 10mm, pin external diameter is set as that 6mm, the distance between shaft shoulder portion are set as 2.8mm.The speed setting of twin shaft shoulder stirring-head type instrument For 2000rpm, translational speed is set as that 1000mm/min, direction of rotation are set as towards right rotation.Additionally, such as embodiment 1 institute Recording, above-mentioned twin shaft shoulder stirring-head type instrument is that the height and position of twin shaft shoulder stirring-head type instrument can be along with metallic plate Warpage and the form that changes.After carrying out friction-stir joint, judge to connect from X-ray penetration test and cross section micro-assembly robot Close quality.

For the test body (materials A 6063-T5) of the metallic plate of friction-stir joint to be carried out, use Ad side and Rd The plate thickness of side is identical, but the test body that thickness changes between 3.0mm, 3.2mm, 3.4mm.

Figure 28 is to represent in example 2, affects the figure of relation between the thickness of the metallic plate of bond quality and gap, its Show the situation of Ad side=Re side.In the drawings, "○" represents the situation that connecting state is good, and "×" represents that connecting state is bad Situation.

According to Figure 28, even if gap increases, as long as the thickness of metallic plate also increases relative to distance Z between shaft shoulder portion Greatly, the situation that connecting state is good is the most still had.If however, it is possible between the distance known between the thickness of metallic plate and shaft shoulder portion Difference more than 0.6mm (in the present embodiment, the thickness of metallic plate is bigger than 3.4mm), then the interior buckling produced between shaft shoulder portion is big, and The life-span making instrument is remarkably decreased.

Additionally, according to Figure 28, distance Z between shaft shoulder portion is 2.8mm, the gap between metallic plate is below 0.75mm Time, as long as the thickness of metallic plate is 3.0～3.4mm, then connecting state is good.As long as it is to say, it is known that by metallic plate Thickness T and spacing Z in shaft shoulder portion be set to 0.2≤T-Z≤0.6mm, then connecting state is good.If T-Z value is less than 0.2, Then the metal of Plastic Flow easily overflows from the first shaft shoulder portion 11 and the second shaft shoulder portion 12, and makes the density at junction surface reduce. Thereby, the probability that joint defect produces improves.If the gap between metallic plate is below 0.75mm, then because of friction-stir joint Frictional heat and make the temperature of metallic plate increase, because metallic plate expand and make gap disappear, it is therefore contemplated that connecting state is substantially Well.

Additionally, according to Figure 28, the distance between shaft shoulder portion is 2.8mm, metallic plate gap each other is for being more than 0.75mm and when being below 1.50mm, as long as the thickness of metallic plate is 3.2～3.4mm, then connecting state is good.It is to say, As long as it is known that the thickness T of metallic plate and spacing Z in shaft shoulder portion are set to 0.4≤T-Z≤0.6mm, then connecting state is good Good.If T-Z value is less than 0.4mm, then the metal after Plastic Flow easily overflows from the first shaft shoulder portion 11 and the second shaft shoulder portion 12 Go out, and make the density at junction surface reduce.Thereby, the probability that joint defect produces improves.

Additionally, according to Figure 28, the distance between shaft shoulder portion is 2.8mm, metallic plate gap each other is more than 1.50mm And when being below 1.75mm, as long as the thickness of metallic plate is 3.4mm, then connecting state is good.As long as it is to say, by metallic plate Thickness T and spacing Z in shaft shoulder portion be set to T-Z=0.6mm, then connecting state is good.

Additionally, according to Figure 28, if gap is 2.0mm, even if then the thickness of metallic plate is that 3.4mm also can produce joint Bad.

Figure 29 is to represent in embodiment 1, and the distance between shaft shoulder portion is fixed as each twin shaft shoulder stirring-head type during 5.8mm The size of instrument and the table of connecting state.Figure 30 is to represent in example 2, when the distance between shaft shoulder portion is fixed as 2.8mm The size of each twin shaft shoulder stirring-head type instrument and the table of connecting state.Figure 31 is to represent in reference example, by between shaft shoulder portion Distance is fixed as size and the table of connecting state of each twin shaft shoulder stirring-head type instrument during 11.5mm.At Figure 29, Figure 30, Figure 31 In, it is shown that tensile resistence/material resistance, fracture resistence force/material resistance, material keep trend.

Tensile resistence/material resistance is by Y²/(X²-Y²) represent.It is to say, the lower surface in the first shaft shoulder portion 11 and The upper surface in two shaft shoulder portions 12 is when friction-stir because of pressing by the metal after Plastic Flow, and therefore, tensile stress is made It is used on pin 13.Therefore, tensile resistence/material resistance uses (the second shaft shoulder portion 12 upper of the lower surface in the first shaft shoulder portion 11 Surface) the square value of external diameter X deduct the square value of the external diameter Y of pin 13 after the value (X that obtains²-Y²), and by the external diameter Y of pin 13 Square value represent divided by the value after value obtained above.

Fracture resistence force/material resistance is by Y²/ YZ represents.It is to say, make docking section at twin shaft shoulder stirring-head type instrument 5 When N moves, effect has the power in the axially vertical direction with pin 13.Therefore, fracture resistence force/material resistance uses the external diameter of pin 13 Square value represent divided by the value after the sectional area in the cross section including axle of pin 13.

Material keeps trend by X²/Y²Represent.It is to say, when friction-stir, the metal after Plastic Flow is by The lower surface in one shaft shoulder portion 11 and the upper surface in the second shaft shoulder portion 12 keep.Therefore, material keeps trend to use first shaft shoulder The square value of the external diameter X in portion 11 (the second shaft shoulder portion 12) represents divided by the value after the square value of the external diameter Y of pin 13.

After Figure 29, Figure 30, Figure 31 are analyzed, it is known that if material keeps trend (X²/Y²) be less than 2.0, then engage Defect easily produces, if bigger than 2.0, then joint defect will not produce.If material keeps trend (X²/Y²) be less than 2.0, then by In the external diameter Y of pin 13 for the external diameter in the first shaft shoulder portion 11 (the second shaft shoulder portion 12) the thickest, it is therefore contemplated that to gold Belong to the area in shaft shoulder portion carrying out pressing to diminish, thus, it is impossible to fully to being pressed by the metal after friction-stir, metal Burr will be produced, and from the outside spilling in shaft shoulder portion.On the other hand, if material keeps trend (X²/Y²) bigger, the most relatively than 2.0 For the external diameter Y of pin 13, the external diameter X in the first shaft shoulder portion 11 (the second shaft shoulder portion 12) is big, therefore, it is possible to use two shaft shoulder portions Metal after flowing plastification fully presses.Thereby, it is believed that joint defect is not easy to produce.

Additionally, after Figure 29, Figure 30, Figure 31 are analyzed, it is known that if tensile resistence/material resistance (Y²/(X²-Y²)) Be less than 0.2, then pin is the most damaged.This is due to tensile resistence/material resistance (Y²/(X²-Y²)) when being less than 0.2, outside pin Footpath Y diminishes relative to shaft shoulder portion external diameter X, it is therefore contemplated that the tensile resistence of pin is relative to producing in the axial direction when engaging Material resistance for not enough, and make pin 13 easily snap off.If tension stress/material resistance (Y²/(X²-Y²)) bigger than 0.2, then may be used To think that pin external diameter Y becomes big relative to shaft shoulder portion external diameter X, therefore, pin 13 is not easy to fracture.

Additionally, after Figure 29, Figure 30, Figure 31 are analyzed, it is known that if fracture resistence force/material resistance (Y²/ YZ) be 1.2 with Under, then pin 13 is the most damaged.This is due at fracture resistence force/material resistance (Y²/ YZ) when being less than 1.2, the external diameter Y of pin relative to For distance (length of pin) Z between the shaft shoulder less, it is therefore contemplated that engage time pin for along and instrument direct of travel phase The fracture resistence force of the material of anti-direction flowing is not enough, and makes pin 13 easily snap off.If fracture resistence force/material resistance (Y²/ YZ) it is more than 1.2, then pin external diameter Y is relatively big for distance (length of the pin) Z between shaft shoulder portion, and therefore, pin 13 is not easy to fracture.

Additionally, after Figure 29, Figure 30, Figure 31 are analyzed, it is known that as tension stress/material resistance (Y²/(X²-Y²)) it is Less than 0.2, or fracture resistence force/material resistance (Y²/ YZ) when being less than 1.2, pin can occur breakage.But, when tension stress/material Resistance (Y²/(X²-Y²)) more than 0.2 and fracture resistence force/material resistance (Y²/ YZ) more than 1.2 time, pin will not be damaged.Therefore, it can Obtain as drawn a conclusion: in order to when preventing from engaging, the pin of twin shaft shoulder stirring-head type instrument occurs breakage, it may be desirable to, by pin Shape be designed so that shaft shoulder portion external diameter X, pin external diameter Y and shaft shoulder portion between distance (length of pin) Z simultaneously meet with following formula (1)、(2)。

Y²/(X²-Y²) ＞ 0.2 ... ... (1)

Y²/ YZ ＞ 1.2 ... ... ... ... (2)

In embodiment 3, twin shaft shoulder stirring-head type instrument is sold spiral fluted ratio and the spiral fluted that quarter sets What kind of impact metallic plate after engaging is brought investigate by direction of rotation.With reference to Fig. 7 (a), by twin shaft shoulder stirring-head type The direction of rotation of instrument is set to and is viewed as towards right rotation from sliding axle side.Additionally, make the top helicla flute 13a of right-hand thread with left The ratio of lower part helical groove 13b of screw thread changes, and sets five kinds of conditions A～E, and carries out friction-stir joint.

In condition A, the ratio of the top helicla flute 13a of right-hand thread with lower part helical groove 13b of left-hand thread is set as 0:100 (does not has right-hand thread).

In condition B, the ratio of the top helicla flute 13a of right-hand thread with lower part helical groove 13b of left-hand thread is set as 25:75.

In condition C, the ratio of the top helicla flute 13a of right-hand thread with lower part helical groove 13b of left-hand thread is set as 50:50.

In condition D, the ratio of the top helicla flute 13a of right-hand thread with lower part helical groove 13b of left-hand thread is set as 75:25.

In condition E, the ratio of the top helicla flute 13a of right-hand thread with lower part helical groove 13b of left-hand thread is set as 100:0 (does not has left-hand thread).

In embodiment 3, prepare the metallic plate (A6063-T5) of the aluminium alloy that two boards thickness T is 6.2mm, and by two pieces Metallic plate engages.First shaft shoulder portion 11 of twin shaft shoulder stirring-head type instrument 5 and the external diameter X in the second shaft shoulder portion 12 are (in shaft shoulder portion The diameter in the face contacted with metallic plate) be set as 20mm, the external diameter Y of pin 13 is set as that 12mm, distance Z between shaft shoulder portion set It is set to 5.8mm.Helicla flute depth-set is 0.81mm.The speed setting of twin shaft shoulder stirring-head type instrument 5 is 800rpm, engages Speed is set as 600mm/min.Additionally, in each condition, in order to the relation between the N of docking section is investigated, gap is changed After becoming 0mm, 1.25mm, 1.50mm, 1.75mm, 2.00mm, test.

Figure 32 is to represent in embodiment 3, the impact (gap of docking section that the difference of height of metallic plate is brought by screw thread ratio For 0mm) figure.Figure 33 is to represent in embodiment 3, and the impact that metallic plate difference of height is brought by screw thread ratio is (between docking section Gap is 1.5mm) figure.Difference of height be the metallic plate before engaging surface on the basis of (benchmark=0), represent after joint is each The height and position at position.Difference of height on the occasion of time represent convexly, represent concavely (groove) during for negative value.

As shown in figure 33, use " ▲ " the Re side of surface Sa that represents be represented as in condition A～E on the occasion of.Namely Saying, the Re side of surface Sa is the most convexly.

On the other hand, the Ad side of the surface Sa that use " ◆ " represents is expressed as the biggest negative value in condition A.Namely Saying, in condition A, the Ad side of surface Sa is in the biggest concavity.Additionally, in the Ad side of the surface Sa using " ◆ " to represent, along with The increase of right-hand thread ratio, the depression of the Ad side of surface Sa progressively reduces, in condition E convexly.

On the other hand, the Ad side of back side Sb using " ■ " to represent be expressed as in condition A the biggest on the occasion of.Namely Saying, in condition A, the Ad side of back side Sb is in the biggest convex.Additionally, in the Ad side of the back side Sb using " ■ " to represent, along with The increase of right-hand thread ratio, the depression of the Ad side of back side Sb is gradually increased, in condition D, E concavely.It is to say, use The Ad side of the back side Sb that the Ad side of the surface Sa that " ◆ " represents represents with use " ■ ", the ratio with right-hand thread that is in is contrary Relation.Additionally, use the Ad side of surface Sa that " ◆ " represent and use " ■ " even the Ad side of the back side Sb represented is in condition C (50:50) under, also the most concavely.

After Figure 32 and Figure 33 is contrasted, it is known that even if the gap of docking section is 1.5mm, in the gap of docking section be During 0mm, the trend of difference of height is the most also almost without change.It is known that the use of Figure 33 " ▲ " the Re side of surface Sa that represents and With use the value of the Re side of back side Sb that "●" represents on the whole compared with Figure 32 little.

Figure 34 is to represent in embodiment 3, in the case of the gap difference of docking section, and the plasticity of the metallic plate of condition A Change the figure in region.Figure 35 is to represent in embodiment 3, in the case of the gap difference of docking section, and moulding of the metallic plate of condition B The figure in property region.Figure 36 is to represent in embodiment 3, in the case of the gap difference of docking section, the metallic plate of condition C The figure in plastification region.Figure 37 is to represent in embodiment 3, in the case of the gap difference of docking section, and the metallic plate of condition D The figure in plastification region.Figure 38 is to represent in embodiment 3, in the case of the gap difference of docking section, and the metal of condition E The figure in the plastification region of plate.The left hurdle of each figure in Figure 34～Figure 38 represents that the micro-assembly robot having carried out plastification region W is observed Sectional view, intermediate hurdles represent the top view of surface (decorative cover) the Sa side of plastification region W, and right hurdle represents plastification region W's The top view of Sb side, the back side.

As shown in the left hurdle of Figure 34, in the case of condition A, it is formed with the biggest groove V in surface (decorative cover) Sa side, But Sb side is formed without groove V overleaf.When the gap of docking section is 1.75mm, 2.00mm, Sa side, surface is formed to engage and lacks Fall into Q.Plastification region W gradually expands towards back side Sb.The lines of plastification region W is that left and right is asymmetrical.Plastification region W The lines of Ad side more deeper than the lines of Re side.Additionally, in Figure 34, the burr P specific surface Sa side of the Sb side, the back side of metallic plate Burr P few.

As shown in the left hurdle of Figure 35, in the case of condition B, it is formed less than condition A in surface (decorative cover) Sa side Groove V, but Sb side does not has groove V overleaf.When the gap of docking section is 2.00mm, the joint that is internally formed at metallic plate lacks Fall into Q.The lines of plastification region W is that left and right is asymmetrical.The lines of the Ad side of plastification region W is more deeper than the lines of Re side. After being contrasted by the back side Sb of condition A of the back side Sb Yu Figure 42 of condition B of Figure 43, the burr P of condition B produces relatively Many, and make rough surface.

As shown in the left hurdle of Figure 36, in the case of condition C, it is formed with less groove V in surface (decorative cover) Sa side, Sb side is also formed with less groove V overleaf.When the gap of docking section is 2.00mm, it is internally formed joint at metallic plate Defect Q.The upper and lower lines of plastification region W is substantially symmetric, and the lines of left and right is substantially symmetric.By the condition C of Figure 36 After the surface Sa of condition B of surface Sa Yu Figure 35 contrasts, almost without burr on the surface Sa of condition C.Additionally, at bar On the back side Sb of part C, the burr P of Re side produces much than the burr P of Ad side.

As shown in the left hurdle of Figure 37, in the case of condition D, it is formed without groove V in surface (decorative cover) Sa side, and Sb side, the back side forms less groove V.When the gap of docking section is 2.00mm, it is internally formed joint defect Q at metallic plate. Additionally, the burr P of the burr P specific surface Sa of back side Sb produces much.

As shown in the left hurdle of Figure 38, in the case of condition E, it is formed without groove V in surface (decorative cover) Sa side, and Sb side, the back side forms the biggest groove V.When the gap of docking section is 1.75mm, 2.00mm, connect being internally formed of metallic plate Close defect Q.Plastification region W becomes narrow gradually towards back side Sb.Sb produces many burr P overleaf, and on surface, Sa does not then have There is generation burr P.

Figure 39 is the table after the result of embodiment 3 being collected.The symbol of each key element is directly with reference to the symbol of embodiment 2. As shown in the schematic diagram of condition A of Figure 47, if arranging the left-hand thread towards right rotation in the range of 100%, then the gold of liquidation Genus can be guided by helicla flute, and towards back side Sb side shifting.Movement because of above-mentioned metal so that twin shaft shoulder stirring-head type instrument 5 The second shaft shoulder portion 12 depressed, twin shaft shoulder stirring-head type instrument 5 relative to metallic plate towards the side contrary with sliding axle 4 (Sb side, the back side) is mobile.Thereby, owing to twin shaft shoulder stirring-head type instrument 5 can enter too far into surface (decorative cover) Sa side, because of This, form the biggest groove V in Sa side, surface.

On the other hand, as shown in condition B of Figure 39～E, on the right-hand thread part arranging more than 25% ratio is used as In the case of portion helicla flute 13a, the metal that the helicla flute of reason right-hand thread causes moves, and will make twin shaft shoulder stirring-head type work Tool 5 is pressed towards sliding axle 4 side (top) such that it is able to prevent twin shaft shoulder stirring-head type instrument from entering too far into metallic plate Surface Sa (decorative cover).Thereby, can prevent from producing groove V, even if or being formed with groove also can subtract at surface Sa (decorative cover) The degree of depth of little groove.Therefore, it is possible to what the metal sheet surface Sa that minimizing is after making joint smoothed polish process is time-consuming. But, when in condition B, condition C, the gap of docking section is 2.00mm, and ought be in condition D, condition E between docking section When gap is 1.75mm or 2.00mm, owing to creating joint defect Q, be therefore not suitable for.If it is believed that this is due to docking section Gap may result in greatly bonding part metal material reduce reason.

It addition, such as slice part E is so, with 100% ratio carve set the right-hand thread towards right rotation time, twin shaft shoulder stirs Mixing head dummy instrument 5 to move upward relative to plate-shaped end 102, the height and position of the lower surface in the first shaft shoulder portion 11 is positioned at tabular The top of the end 102 surface (decorative cover) Sa before friction-stir, the height and position of the lower surface in the first shaft shoulder portion 11 with In the case of gap between the plate-shaped end 102 surface Sa before friction-stir is relatively big, the pressing of metal is the most abundant, but It it is the gap between height and position and the plate-shaped end 102 surface Sa before friction-stir of lower surface in the first shaft shoulder portion 11 In the case of small, it is possible to press metal fully.

Additionally, the height and position of lower surface in the first shaft shoulder portion 11 and the plate-shaped end 102 surface before friction-stir In the case of gap between Sa is small, plastification region W only highlights a little than the surface Sa before friction-stir.But, by plate What the surface Sa of shape end 102 was smoothened process aligns with the height of the surface Sa before friction-stir and will dash forward owing to having only to The part gone out is cut, and therefore, polish processes and becomes easy.

In above-mentioned embodiment 1, top helicla flute 13a and lower part helical groove 13b relative to distance Z between shaft shoulder portion with The ratio of 50:50 is formed, but decorative cover is being set to surface Sa, and makes twin shaft shoulder stirring-head type instrument 5 towards the feelings of right rotation Under condition, it may be desirable to, make top helicla flute 13a and the left side for the second side, shaft shoulder portion 12 of the right-hand thread of the first side, shaft shoulder portion 11 Lower part helical groove 13b of screw thread is formed with the ratio of 25:75～100:0 relative to distance Z between shaft shoulder portion.It is to say, also Can be formed as the top helicla flute 13a of right-hand thread becoming the first side, shaft shoulder portion 11 is Z-shaped relative to the distance between shaft shoulder portion The part of more than 25%, and using the part beyond the helicla flute 13a of top all as lower part helical groove 13b of left-hand thread.Make Twin shaft shoulder stirring-head type instrument 5 is towards in the case of right rotation, it is also possible to be not provided with left-hand thread, and in the axial total length of pin 13 On right-hand thread is set.

Additionally, in embodiment 3, though Sa side, surface is set as decorative cover but it also may Sb side, the back side is set as dress Facing.In this case, with reference to Figure 39, by the direction of rotation of twin shaft shoulder stirring-head type instrument 5, spiral fluted are wound Direction sets according to condition A, B, C, D, thereby, can prevent back side Sb (decorative cover) side from producing groove V, even if or being formed with recessed Groove V also can reduce the degree of depth of groove V.

It is to say, make twin shaft shoulder stirring-head type instrument 5 be set as decorating by rear side Sb while right rotation In the case of face, it may be desirable to, including: docking operation, in this docking operation, make the end face of metallic plate abut each other； And bonding process, in this bonding process, make the second shaft shoulder portion 12 relative with the decorative cover of metallic plate, and making the axle of pin 13 After center is directed at the center, thickness of slab direction of metallic plate, the pin 13 of the twin shaft shoulder stirring-head type instrument 5 towards right rotation is made to move Move docking section N, carry out friction-stir joint, distance Z between shaft shoulder portion is set as below the thickness of slab of metallic plate, and at pin Second side, shaft shoulder portion 12 of the outer peripheral face of 13 forms the helicla flute of left-hand thread, and makes the helicla flute of above-mentioned left-hand thread relative to the shaft shoulder Distance Z between portion is formed with the ratio of more than 25%.

According to above-mentioned joint method, the left-hand thread of the second side, shaft shoulder portion 12 is formed with the ratio of more than 25%, therefore, and reason The metal that the helicla flute of left-hand thread causes moves, will make twin shaft shoulder stirring-head type instrument 5 towards with sliding axle 4 opposite side (lower section) presses such that it is able to prevent twin shaft shoulder stirring-head type instrument 5 from entering too far into the back side (decorative cover) Sb of metallic plate. Thereby, it is possible to prevent from producing groove, even if or being formed with groove also can reduce the degree of depth of groove at decorative cover.

Figure 40 is the figure after making twin shaft shoulder stirring-head type instrument collect towards situation during anticlockwise.

In condition F, the ratio of the top helicla flute 13a of left-hand thread with lower part helical groove 13b of right-hand thread is set as 0:100 (does not has left-hand thread).

In condition G, the ratio of the top helicla flute 13a of left-hand thread with lower part helical groove 13b of right-hand thread is set as 25:75.

In condition H, the ratio of the top helicla flute 13a of left-hand thread with lower part helical groove 13b of right-hand thread is set as 50:50.

In condition I, the ratio of the top helicla flute 13a of left-hand thread with lower part helical groove 13b of right-hand thread is set as 75:25.

In condition J, the ratio of the top helicla flute 13a of left-hand thread with lower part helical groove 13b of right-hand thread is set as 100:0 (does not has right-hand thread).

As shown in Embodiment 2, when towards anticlockwise, use and be provided with left-hand thread, at lower part helical at top helicla flute 13a Groove 13b is provided with the twin shaft shoulder stirring-head type instrument 5A of right-hand thread.When making twin shaft shoulder stirring-head type instrument 5A towards anticlockwise, Due to different from the coiling direction of the screw thread of the twin shaft shoulder stirring-head type instrument 5 of embodiment 1, therefore, can table in result Reveal action effect same as in Example 3.It is to say, as shown in condition G～condition J, because of friction-stir after liquidation Metal can by the left-hand thread of pin 13 top helicla flute 13a guide after, towards the first shaft shoulder portion 11 side shifting, and by the right side of pin 13 After the top helicla flute 13b of screw thread guides, towards the second shaft shoulder portion 12 side shifting.Due to left-hand thread with more than 25% ratio shape Becoming, therefore, the metal that the helicla flute of reason left-hand thread causes moves so that twin shaft shoulder stirring-head type instrument 5A is by towards sliding axle 4 sides (top) press such that it is able to prevent twin shaft shoulder stirring-head type instrument 5A from entering too far into the surface (decoration of metallic plate Face) Sa.Thereby, can prevent from producing groove V, even if or being formed with groove V also can reduce groove V's at surface (decorative cover) Sa The degree of depth.Thereby, it is possible to it is time-consuming that the polish smoothened for surface Sa of minimizing metallic plate after making joint processes.

It addition, such as slice part J is so, with 100% ratio carve set the left-hand thread towards anticlockwise time, twin shaft shoulder stirs Mix head dummy instrument 5 to move upward relative to plate-shaped end 102, and make the height and position of the lower surface in the first shaft shoulder portion 11 be positioned at Above the plate-shaped end 102 surface Sa before friction-stir, the height and position of the lower surface in the first shaft shoulder portion 11 and tabular In the case of gap between the surface Sa before friction-stir of the end 102 is relatively big, the pressing of metal will be abundant not, but Gap between the height and position of the lower surface in the first shaft shoulder portion 11 and the plate-shaped end 102 surface Sa before friction-stir is micro- In the case of little, just can fully metal be pressed.

Between the height and position of the lower surface in the first shaft shoulder portion 11 and the plate-shaped end 102 surface Sa before friction-stir Gap small in the case of, plastification region W only highlights a little than the surface Sa before friction-stir.But, by plate-shaped end What the surface Sa of 102 was smoothened process aligns and by prominent portion with the height of the surface Sa before friction-stir owing to having only to Cutting and cut, therefore, polish processes and becomes easy.

In above-mentioned embodiment 2, top helicla flute 13a and lower part helical groove 13b relative to distance Z between shaft shoulder portion with The ratio of 50:50 is formed, but decorative cover is being set to surface Sa, and makes twin shaft shoulder stirring-head type instrument 5 towards the feelings of anticlockwise Under condition, it may be desirable to, the top helicla flute 13a of the left-hand thread of the first side, shaft shoulder portion 11 and the right spiral shell of the second side, shaft shoulder portion 12 Lower part helical groove 13b of stricture of vagina is formed with the ratio of 25:75～100:0 relative to distance Z between shaft shoulder portion.That is, it is possible to To be formed as by left-hand thread top helicla flute 13a in the first side, shaft shoulder portion 11, Z-shaped relative to the distance between shaft shoulder portion become 25% Above part, and make the part beyond the helicla flute 13a of top all as lower part helical groove 13b of right-hand thread.Make twin shaft Shoulder stirring head dummy instrument 5 is towards in the case of anticlockwise, it is also possible to being not provided with right-hand thread, the axial whole total length at pin 13 sets Put left-hand thread.

Although it addition, Sa side, surface is set as decorative cover but it also may S side, the back side is set as decorative cover.This In the case of, with reference to Figure 40, by by the direction of rotation of twin shaft shoulder stirring-head type instrument 5, spiral fluted coiling direction according to condition F, G, H, I set, and thereby, can prevent Sb (decorative cover) side overleaf from producing groove V, even if or being formed with groove V also can subtract The degree of depth of little groove V.

It is to say, make twin shaft shoulder stirring-head type instrument 5 be set as decorative cover towards anticlockwise and by Sb side, the back side In the case of, it may be desirable to, including: docking operation, in this docking operation, make the end face of metallic plate abut each other；And Bonding process, in this bonding process, makes the second shaft shoulder portion 12 relative with the decorative cover of metallic plate, and by the axial direction of pin 13 After the heart is directed at the center, thickness of slab direction of metallic plate, the pin 13 of the twin shaft shoulder stirring-head type instrument 5A towards anticlockwise is made to move to Docking section N, carries out friction-stir joint, and distance Z between shaft shoulder portion is set as below the thickness of slab of metallic plate, and at pin 13 Second side, shaft shoulder portion 12 of outer peripheral face forms the helicla flute of right-hand thread, and between making the helicla flute of above-mentioned right-hand thread relative to shaft shoulder portion Distance Z with more than 25% ratio formed.

According to above joint method, the right-hand thread of the second side, shaft shoulder portion 12 is formed with the ratio of more than 25%, therefore, because of The metal caused by the helicla flute of right-hand thread moves so that twin shaft shoulder stirring-head type instrument 5A is by towards contrary with sliding axle 4 Side (lower section) presses such that it is able to prevent twin shaft shoulder stirring-head type instrument 5A from entering too far into the back side (decorative cover) of metallic plate Sb.Thereby, it is possible to prevent overleaf (decorative cover) to produce groove, even if or forming groove also can reduce the degree of depth of groove.

Then, embodiments of the invention 4 are illustrated.Figure 41 is engaging form or the docking form representing embodiment 4 Front view, wherein, Figure 41 (a) represents type I, and Figure 41 (b) represents Type II, and Figure 41 (c) represents type-iii.In embodiment 4 In, prepare three kinds of bodies to be tested, only the part of type I, Type II and type-iii is carried out friction-stir joint respectively, and right After joint, respective angular deformation is investigated.

Type I～III are double face slab 201A, the 201B being made up of aluminium alloy 6N01-T5 material, with reference to Figure 12 and figure 41, it is set to and makes the thickness of slab a=3mm of outside plate heavy section (first outside plate heavy section the 211, second outside plate heavy section 221), covering part The thickness b=0.5mm of (covering part 213,223,232,242), from length c of support plate the 204 to the first end face 33 and from supporting Length c=15mm of plate the 204 to the second end face 43, from length d=of the upper surface of outside plate 202 to the lower surface of inner panel 203 30mm, left and right width dimensions e=200mm, extend a size of 5000mm.

With reference to Figure 15, twin shaft shoulder stirring-head type instrument 265 is set to lower surface 252c straight making the first shaft shoulder portion 252 Footpath X2=10mm, the diameter Y2=10mm of upper surface 253c in the second shaft shoulder portion 253, the external diameter Y1=in the second shaft shoulder portion 253 15mm, the external diameter U=6mm of pin 254.Length (length of pin 254) from the first 252 to the second shaft shoulder portion of shaft shoulder portion 253 sets For 2.9mm.The shape of the depressed part (not shown) being formed at the lower surface 252c in the first shaft shoulder portion 252 is vortex from top view Shape, the depth-set of depressed part is 0.3mm, and the spacing of depressed part is set as 1.2mm.Twin shaft shoulder stirring-head type instrument 265 sets Determine into and all move towards rear side outside the paper of Figure 41 (a)～Figure 41 (c) towards right rotation, type I～III.Twin shaft shoulder stirs The speed setting mixing head dummy instrument 265 is 2000rpm, and translational speed is set as 1000mm/min.

In type I, as shown in Figure 41 (a), in the left side configuration of the direct of travel of twin shaft shoulder stirring-head type instrument 265 Double face slab 201A, configures double face slab 201B, and makes the first hook portion 212A and the engaging of the second hook portion 222B on right side.

In Type II, as shown in Figure 41 (b), join on the right side of the direct of travel of twin shaft shoulder stirring-head type instrument 265 Put double face slab 201A, configure double face slab 201B in left side, and make the first hook portion 212A and the engaging of the second hook portion 222B.

In type-iii, as shown in Figure 41 (c), join in the left side of the direct of travel of twin shaft shoulder stirring-head type instrument 265 Put double face slab 201A, configure double face slab 201B on right side, and make the first end face 233A and the second end face 243B docking.

Figure 42 is the figure of the angular deformation result representing type I.Figure 43 is the figure of the angular deformation result representing Type II.Figure 44 It it is the figure of the angular deformation result representing type-iii.Transverse axis represent engaged body each to be tested away from left-hand end at width On length.Width=200mm is the position representing centrage C.The longitudinal axis represent each body to be tested away from arbitrary benchmark Point, engage after height.To the distance towards bearing of trend from the front end of each body to be tested be 50mm, 200mm, 400mm, 600mm, The height everywhere of 800mm, 950mm calculates.

Such as Figure 42, shown in 43, in type I, Type II, the height in the position of width=180mm is the highest, The height of the position of width=210mm is minimum.It is to say, bonding part forms slight concave shape.Additionally, On the difference of height of the position of width=180mm～210mm, Type II is bigger than type I.Additionally, in the width direction= The position of 210mm is on the difference of height of the right-hand member of body to be tested, and Type II is also big than type I.It is to say, it is known that type The angular deformation of II angular deformation than type I on the whole is big.

It is believed that this is owing to, as shown in Figure 41 (a) and Figure 41 (b), double face slab 201A, 201B are by twin shaft shoulder Caused by the difference of the force direction of stirring head dummy instrument 265 and the engaging form of double face slab 201A, 201B.It is contemplated that Make the twin shaft shoulder stirring-head type instrument 265 (helicla flute 255 of pin 254 is left-hand thread) of present embodiment towards right rotation, and from When outside the paper of Figure 41, past rear side moves, effect has stress F1.

Therefore, if the Type II shown in Figure 41 (b), then due to the incline direction of inclined plane Ma and the stress of holding section M The action direction of F1 is almost parallel, and the input position that stress F1 is relative to centrage C is positioned at the same side with inclined plane Ma, because of This, double face slab 201B easily moves towards right obliquely downward, so that the separate probability of double face slab 201A, 201B carries in Jie Heing High.

On the other hand, if type I shown in Figure 41 (a), then due to holding section M inclined plane Ma incline direction with should The action direction of power F1 intersects, and the input position that stress F1 is relative to centrage C is positioned at opposition side with inclined plane Ma, therefore, Double face slab 201A, 201B in joint can be effectively prevented divide out.

It addition, as shown in figure 44, in type-iii, in the position that width is 180mm with at width it is The height of the position of 210mm is roughly the same.It is to say, compared with the end of left and right, bonding part is the highest, observe in mountain from front Type.Additionally, the difference of height of type-iii also difference of height than type I, II is big.Assume to configure polylith (such as five pieces) double face slab, And start from N side, docking section as type-iii friction-stir engage, then it is believed that after Jie Heing double face slab entirety angle Deflection can increase.Therefore, from the viewpoint of bond strength, the most first which in holding section M and docking section N is carried out It is the most no problem to engage, if but if considering angular deformation amount, it may be desirable to, first carry out friction-stir from M side, holding section and connect Close.

Figure 45 is the direction of rotation of twin shaft shoulder stirring-head type instrument, spiral fluted coiling direction, engaging form to be collected After table.In Figure 45, it is shown that the optimum condition 1～4 of four types.As shown in condition 1 (same with present embodiment), make Helicla flute be the twin shaft shoulder stirring-head type instrument 265 of left-hand thread towards right rotation, and towards back side sidesway outside the paper of Figure 45 In the case of Dong, engaging form preferably selects type I.

It is to say, in condition 1, owing to making twin shaft shoulder stirring-head type instrument 265 towards right rotation, therefore, effect has Relative to centrage C, from left side, metal after the component in direction towards right side, and plastification flowing can be guided by helicla flute, and Move down from upper.Therefore, in condition 1, do so with there being stress F1 as shown in engaging form.Thus, in type I, logical Cross and the second hook portion 212B and inclined plane Ma of holding section M are set in the way of relative with stress F1, it is thus possible to double in preventing from engaging Deck panels 201A, 201B divide out.

Additionally, as shown in condition 2, at the twin shaft shoulder stirring-head type instrument 265 making helicla flute be right-hand thread towards anticlockwise, And in the case of moving towards rear side outside the paper of Figure 45, engaging form preferably selects Type II.

It is to say, in condition 2, owing to making twin shaft shoulder stirring-head type instrument 265 towards anticlockwise, therefore, effect has Relative to centrage C, from right side, metal after the component in direction towards left side, and plastification flowing can be guided by helicla flute, and Move down from upper.Therefore, in condition 2, do so with there being stress F2 as shown in engaging form.Thus, in Type II, logical Cross and the second hook portion 212B and inclined plane Ma of holding section M are set in the way of relative with stress F2, it is thus possible to double in preventing from engaging Deck panels 201A, 201B divide out.

Similarly, as shown in condition 3, at the twin shaft shoulder stirring-head type instrument 265 making helicla flute be right-hand thread towards dextrorotation Turn, and in the case of moving towards rear side outside the paper of Figure 45, engaging form preferably selects type IV.

Similarly, as shown in condition 4, at the twin shaft shoulder stirring-head type instrument 265 making helicla flute be left-hand thread towards left-handed Turn, and in the case of moving towards rear side outside the paper of Figure 45, engaging form preferably selects type V.

Even if in the case of condition 3, condition 4, by arranging inclining of snap-latch surface M by the way of relative with stress F3, F4 Inclined-plane Ma ' and the second hook portion 212B ', it is thus possible to double face slab 201A ', 201B ' separate in preventing from engaging.

Additionally, in condition 1, condition 2, it may be desirable to, in the first side, shaft shoulder portion 252, covering part is set, in condition 3, in 4, it may be desirable to, in the second side, shaft shoulder portion 253, covering part is set.Thereby, it is possible to metal is added to because friction is stirred Mix and make the side that metal is not enough, therefore, it is possible to it is not enough to supplement metal.

In embodiment 5, five pieces are used to carry out friction-stir joint with the various sizes of double face slab of embodiment 4.If ginseng According to Figure 12, the double face slab of embodiment 5 is set to and makes outside the thickness of slab a=4.0mm of heavy section, the thickness b=of covering part 0.5mm, left and right width dimensions e=400mm, extend a size of 12500mm.

If with reference to Figure 15, twin shaft shoulder stirring-head type tool settings becomes to make that the lower surface 252c's in the first shaft shoulder portion 252 is straight Footpath X2=15mm, the external diameter Y1=18mm in the second shaft shoulder portion 253, the diameter Y2=of upper surface 253c in the second shaft shoulder portion 253 15mm, the external diameter U=9mm of pin 254.Length (length of pin 254) from the first 252 to the second shaft shoulder portion of shaft shoulder portion 253 sets For 3.7mm.Additionally, the rotary speed of twin shaft shoulder stirring-head type instrument is set as 1000rpm.Additionally, twin shaft shoulder is stirred The translational speed mixing head dummy instrument is set in M side, holding section to be 1000mm/min, is 1500mm/min in N side, docking section.

In embodiment 5, the double face slab of a side is placed on desktop, the double face slab of the opposing party is put down from top, Carry out engaging and docking.After seamlessly being engaged by five pieces of double face slabs by identical operation, fixing assembly makes it not Can move freely.And use the horizontal pressing tongs being arranged on extending direction with 1.5m interval to press, so that assembly is not Can float.Additionally, the four of assembly corners are clamped simply.Then, start from one end to carry out friction-stir joint successively.

Even if under conditions of embodiment 5, also can produce and be not engaged bad face component.Here, in general, When hardware is carried out friction-stir joint, make the hardware generation warpage after joint sometimes because of thermal contraction.Assume In the case of the surface of hardware, the back side carry out friction-stir joint, in the rotation speed of the throw with the same terms Degree, translational speed and movable length, after the surface of hardware is carried out friction-stir joint, carry out friction-stir to rear side Engage, then the rear side of hardware may be warped into concavity.

This is due to after face side is carried out friction-stir joint, because thermal contraction can make hardware be formed in face side Concavity, therefore, turns over when being placed on smooth desktop, so that it may make the gap between desktop and hardware become by hardware Greatly.In this state, if rear side carries out friction-stir joint, then the heat produced by friction-stir is just not easy to dissipate to Desktop, therefore, makes the heat of residual on hardware increase.As a result of which it is, the common work of the heat owing to residuing in hardware With so that rear side is warped into concavity significantly.

Therefore, as long as embodiment 5, the twin shaft shoulder stirring-head type instrument of N side, docking section is moved degree of hastening and sets Determine into the twin shaft shoulder stirring-head type instrument than holding section M and move degree of hastening soon, when preventing from engaging, enter the heat of docking section Amount.Thereby, it is possible to prevent the double face slab warpage after engaging.

In embodiment 6, tested in order to the relation between the thickness of slab of plate-shaped end and length is investigated.As Shown in Figure 46 (a), it is body to be tested 301,301 docking of the same shape of U-shaped by two pieces of cross sections, and docking section N is carried out Friction-stir engages.Each body to be tested 301 includes supporting member 302, from the most extended plate-shaped end of supporting member 303。

The height of body 301 to be tested is set as 30mm, extends and is dimensioned so as to 500mm.Such as Figure 46 (a), Figure 46 (b) institute Show, using the thickness of slab a of plate-shaped end 303 and from supporting member 302 to length c of the front end of plate-shaped end 303 as parameter, respectively Under the conditions of carry out friction-stir joint.In Figure 46 (b), each condition and the bond quality of embodiment 6 are aggregated into table.Double-shaft shoulder The size of portion's stirring head dummy instrument is as shown in the table of Figure 46 (b).

As shown in Figure 46 (b), thickness of slab a=3mm, from supporting member 402 to length c=of the front end of plate-shaped end 403 During 50mm, joint can be produced bad.Additionally, in the case of thickness of slab a=6mm, when length c=70mm, 80mm can produce joint Bad.In the case of thickness of slab a=12mm, joint can be produced when length c=120mm bad.If it is to say, plate-shaped end The length of 303 is long relative to supporting member 302, then the front of plate-shaped end 303 is easily deformed, and is therefore easily caused joint Bad.

Figure 47 is the figure of the dependency relation representing embodiment 6.The transverse axis of Figure 47 represents thickness of slab a, and the longitudinal axis represents from supporting structure Part 302 is to length c of the front end of plate-shaped end 303.Knowable to this figure, it may be desirable to, by from supporting member to front end Length c is set to the condition meeting c≤7.0 × thickness of slab a+18.5mm.As long as under these conditions, it becomes possible to suppression plate-shaped end The deformation of 303, thus it is not easy to it is bad to produce joint.

(symbol description)

1 friction-stir device

1a chuck portion

2 throw unit

3 keepers

4 sliding axles

5 twin shaft shoulder stirring-head type instruments

6 sliding members

11 first shaft shoulder portions

12 second shaft shoulder portions

13 pins

13a top helicla flute

13b lower part helical groove

100A hollow material

100B hollow material

N docking section

The thickness of T metallic plate

W plastification region (junction surface)

The external diameter in X shaft shoulder portion

The external diameter of Y pin

Distance (length of pin) between Z shaft shoulder portion

Claims

1. a friction stirring connecting method, uses friction-stir device to engage a pair metallic plate, and described friction is stirred Mixing device and be configured to include twin shaft shoulder stirring-head type instrument and sliding axle, wherein, described twin shaft shoulder stirring-head type instrument has There are the first shaft shoulder portion, the second shaft shoulder portion and the pin formed between described first shaft shoulder portion and described second shaft shoulder portion, when because rubbing Wipe stirring and make metallic plate deform, make axially displaced along described twin shaft shoulder stirring-head type instrument of the position of described metallic plate Time, described twin shaft shoulder stirring-head type instrument is axially moveable along with the displacement of described metallic plate, it is characterised in that described in rub Wiping stirring joint method includes:

Docking operation, in this docking operation, makes the end face of described metallic plate abut each other；And

Bonding process, in this bonding process, making, described first shaft shoulder portion is relative with the decorative cover of described metallic plate, and makes institute State after the axial centre of pin is directed at the center in the thickness of slab direction of described metallic plate, make to be viewed as towards dextrorotation from described sliding axle side The docking section that the pin of the described twin shaft shoulder stirring-head type instrument turned is formed after moving to abut each other described end face, is carried out Friction-stir engages,

Distance between shaft shoulder portion is set as below the thickness of slab of described metallic plate,

The helicla flute of right-hand thread, the helicla flute of described right-hand thread it is formed with in described first side, shaft shoulder portion of the outer peripheral face of described pin Formed with the ratio of more than 25% relative to the distance between described first shaft shoulder portion and described second shaft shoulder portion, reason right-hand thread The metal that helicla flute causes moves so that described twin shaft shoulder stirring-head type instrument is pressed towards described sliding axle side.

2. friction stirring connecting method as claimed in claim 1, it is characterised in that

In described outer peripheral face, from being formed with the spiral fluted part of described right-hand thread to described second shaft shoulder portion, shape Become to have the helicla flute of left-hand thread.

3. a friction stirring connecting method, uses friction-stir device to engage a pair metallic plate, and described friction is stirred Mixing device and be configured to include twin shaft shoulder stirring-head type instrument and sliding axle, wherein, described twin shaft shoulder stirring-head type instrument has There are the first shaft shoulder portion, the second shaft shoulder portion and the pin formed between described first shaft shoulder portion and described second shaft shoulder portion, when because rubbing Wipe stirring and make metallic plate deform, make axially displaced along described twin shaft shoulder stirring-head type instrument of the position of described metallic plate Time, described twin shaft shoulder stirring-head type instrument is axially moveable along with the displacement of described metallic plate, it is characterised in that described in rub Wiping stirring joint method includes:

Bonding process, in this bonding process, making, described first shaft shoulder portion is relative with the decorative cover of described metallic plate, and makes institute State after the axial centre of pin is directed at the center in the thickness of slab direction of described metallic plate, make to be viewed as towards left-handed from described sliding axle side The docking section that the pin of the described twin shaft shoulder stirring-head type instrument turned is formed after moving to abut each other described end face, is carried out Friction-stir engages,

The helicla flute of left-hand thread, the helicla flute of described left-hand thread it is formed with in described first side, shaft shoulder portion of the outer peripheral face of described pin Being formed with the ratio of more than 25% relative to the distance between described shaft shoulder portion, the metal that the helicla flute of reason left-hand thread causes moves Dynamic so that described twin shaft shoulder stirring-head type instrument is pressed towards described sliding axle side.

4. friction stirring connecting method as claimed in claim 3, it is characterised in that

In described outer peripheral face, from being formed with the spiral fluted part of described left-hand thread to described second shaft shoulder portion, shape Become to have the helicla flute of right-hand thread.

5. a friction stirring connecting method, uses friction-stir device to engage a pair metallic plate, and described friction is stirred Mixing device and be configured to include twin shaft shoulder stirring-head type instrument and sliding axle, wherein, described twin shaft shoulder stirring-head type instrument has There are the first shaft shoulder portion, the second shaft shoulder portion and the pin formed between described first shaft shoulder portion and described second shaft shoulder portion, when because rubbing Wipe stirring and make metallic plate deform, make axially displaced along described twin shaft shoulder stirring-head type instrument of the position of described metallic plate Time, described twin shaft shoulder stirring-head type instrument is axially moveable along with the displacement of described metallic plate, it is characterised in that described in rub Wiping stirring joint method includes:

Bonding process, in this bonding process, making, described second shaft shoulder portion is relative with the decorative cover of described metallic plate, and makes institute State after the axial centre of pin is directed at the center in the thickness of slab direction of described metallic plate, make to be viewed as towards dextrorotation from described sliding axle side The docking section that the pin of the described twin shaft shoulder stirring-head type instrument turned is formed after moving to abut each other described end face, is carried out Friction-stir engages,

The helicla flute of left-hand thread, the helicla flute of described left-hand thread it is formed with in described second side, shaft shoulder portion of the outer peripheral face of described pin Being formed with the ratio of more than 25% relative to the distance between described shaft shoulder portion, the metal that the helicla flute of reason left-hand thread causes moves Dynamic so that described twin shaft shoulder stirring-head type instrument is by towards pressing with described sliding axle opposite side.

6. friction stirring connecting method as claimed in claim 5, it is characterised in that

In described outer peripheral face, from being formed with the spiral fluted part of described left-hand thread to described first shaft shoulder portion, shape Become to have the helicla flute of right-hand thread.

7. a friction stirring connecting method, uses friction-stir device to engage a pair metallic plate, and described friction is stirred Mixing device and be configured to include twin shaft shoulder stirring-head type instrument and sliding axle, wherein, described twin shaft shoulder stirring-head type instrument has There are the first shaft shoulder portion, the second shaft shoulder portion and the pin formed between described first shaft shoulder portion and described second shaft shoulder portion, when because rubbing Wipe stirring and make metallic plate deform, make axially displaced along described twin shaft shoulder stirring-head type instrument of the position of described metallic plate Time, described twin shaft shoulder stirring-head type instrument is axially moveable along with the displacement of described metallic plate, it is characterised in that described in rub Wiping stirring joint method includes:

Bonding process, in this bonding process, making, described second shaft shoulder portion is relative with the decorative cover of described metallic plate, and makes institute State after the axial centre of pin is directed at the center in the thickness of slab direction of described metallic plate, make to be viewed as towards left-handed from described sliding axle side The docking section that the pin of the described twin shaft shoulder stirring-head type instrument turned is formed after moving to abut each other described end face, is carried out Friction-stir engages,

The helicla flute of right-hand thread, the helicla flute of described right-hand thread it is formed with in described second side, shaft shoulder portion of the outer peripheral face of described pin Being formed with the ratio of more than 25% relative to the distance between described shaft shoulder portion, the metal that the helicla flute of reason right-hand thread causes moves Dynamic so that described twin shaft shoulder stirring-head type instrument is by towards pressing with described sliding axle opposite side.

8. friction stirring connecting method as claimed in claim 7, it is characterised in that

In described outer peripheral face, from being formed with the spiral fluted part of described right-hand thread to described first shaft shoulder portion, shape Become to have the helicla flute of left-hand thread.

9. the friction stirring connecting method as described in claim 1,3,5 or 7, it is characterised in that

In described bonding process, engage while the decorative cover of described metallic plate is cooled down.