CN103909343B

CN103909343B - Friction stirring connecting method

Info

Publication number: CN103909343B
Application number: CN201410136875.4A
Authority: CN
Inventors: 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: 2012-01-18
Publication date: 2016-04-27
Anticipated expiration: 2032-01-18
Also published as: JPWO2012099152A1; CN103476532B; KR20140029389A; CN103909344A; CN103909344B; CN103909343A; JP5864446B2; CN103894728A; TWI494184B; CN103476532A; TW201235137A; KR101471319B1; CN103894728B; WO2012099152A1

Abstract

The invention provides a kind of throw unit, when using twin shaft shoulder stirring-head type instrument to engage pair of metal plate, the generation of joint defect can be suppressed.The feature of above-mentioned throw unit is, there is the keeper (303) of the tubular being fixed on chuck portion (301), sliding axle (304) and twin shaft shoulder stirring-head type instrument (305), keeper (303) has: a pair elongated hole (311), this a pair elongated hole (311) is radially through and toward each other, sliding axle (304) has the alignment pin (322) be inserted in a pair elongated hole (311) and the fixed component (323) alignment pin (322) being fixed on sliding axle (304), elongated hole (311) is axially extended, by the engaging of elongated hole (311) with alignment pin (322), sliding axle (304) and keeper (303) are rotated integratedly, and move vertically in the scope of elongated hole (311).

Description

Friction stirring connecting method

Patent application of the present invention is international application no is PCT/JP2012/050933, international filing date is on 01 18th, 2012, the application number entering National Phase in China is 201280005439.2, the divisional application of the application for a patent for invention that name is called " assembly of throw unit, friction stirring connecting method, double face slab and the friction stirring connecting method of double face slab ".

Technical field

The present invention relates to there is twin shaft shoulder stirring-head type instrument (Japanese: ボ PVC Application Star ー Le, bobbintool) throw unit, use the friction stirring connecting method of above-mentioned throw unit, the assembly of the double face slab that uses above-mentioned throw unit to engage and use the friction stirring connecting method of double face slab of above-mentioned throw.

Background technology

Conventionally, there is known twin shaft shoulder stirring-head type instrument is used as the instrument (with reference to the patent document 1) end face of metallic plate being carried out each other to friction-stir joint.The threaded that twin shaft shoulder stirring-head type instrument comprises a pair shaft shoulder portion and formed between above-mentioned shaft shoulder portion.When being engaged by pair of metal plate, fixedly being made by metallic plate it not move, the twin shaft shoulder stirring-head type instrument of High Rotation Speed being inserted from one end of metallic plate, and threaded is moved along docking section.By this, end face separately metal around just made metallic plate be engaged with each other by friction-stir.If use twin shaft shoulder stirring-head type instrument, because the rear side at metallic plate also has shaft shoulder portion, therefore, the back of the body connection member (Japanese: Li is when portion's material) of the rear side being configured in metallic plate can usually be omitted.Particularly, when being engaged with each other the end of hollow material, because the operation arranging back of the body connection member is comparatively complicated, therefore, significantly can save operation procedure.

On the other hand, conventionally, there is known the double face slab that two pieces of metallic plates overlaps are formed.Double face slab is used as the structure of rolling stock, aircraft, ship, civil construction thing etc.Described in patent document 2, the support plate that double face slab comprises outside plate, inner panel and is folded between outside plate and inner panel.In addition, when being engaged with each other by double face slab, making that the outside plate end of adjacent double face slab is docked with outside plate end, inner panel end is docked with inner panel end, after forming the assembly of double face slab, using throw the partial frictional after docking to be stirred and engaging.

Prior art document

Patent document

Patent document 1: Japanese Patent Laid No. 2712838 publication

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

Summary of the invention

Invent technical problem to be solved

But, in using the friction-stir of twin shaft shoulder stirring-head type instrument to engage, it is preferable that, engage the Centered of short transverse of the axial centre with metallic plate that make threaded simultaneously, but metallic plate can deform because of frictional heat sometimes.Once metallic plate deforms because of frictional heat, then just cannot align with the center of metallic plate in the center of threaded, and cause joint bad.

In addition, if the distance between the shaft shoulder portion of twin shaft shoulder stirring-head type instrument is larger than the thickness of metallic plate, be then easily spilled over to the outside in shaft shoulder portion by the metal after plastic flow automation by friction-stir, therefore, exist and easily produce the such problem of joint defect.

In addition, the outer peripheral face of the threaded of twin shaft shoulder stirring-head type instrument is carved with helicla flute sometimes, but because of the difference of the scope that spiral fluted direction or quarter establish, there is the groove change that the decorative cover of metallic plate is upon engagement formed and produce the such problem of many burr greatly or on decorative cover.

In addition, because double face slab is thin and long hardware, therefore, the operation making the outside plate of a pair double face slab and outside plate, inner panel carry out accurately docking with inner panel is comparatively difficult.In addition, even if use fixture fixedly to make it not move the assembly of double face slab, also there is double face slab such problem separated from one another when making throw move to engage.

The present invention completes in view of the above problems, and its technical problem is that providing a kind of can suppress the generation of joint defect and the throw unit that can engage ideally and friction stirring connecting method when using twin shaft shoulder stirring-head type instrument to engage pair of metal plate.In addition, its technical problem is, when the outer peripheral face of the threaded at twin shaft shoulder stirring-head type instrument is carved with helicla flute, can reduces the burr produced on the decorative cover of metallic plate, or can reduce the groove formed on decorative cover.In addition, technical problem of the present invention is to provide a kind of assembly of double face slab that can be engaged by double face slab ideally and the friction stirring connecting method of double face slab.

The technical scheme that technical solution problem adopts

In order to solve the problems of the technologies described above, the present invention proposes a kind of friction stirring connecting method, uses throw unit, pair of metal plate is engaged, wherein, above-mentioned throw unit has: cylindric keeper, and the keeper of this cylindrical shape is fixed on the chuck portion of friction-stir device, sliding axle, this sliding axle can be inserted into the inside of above-mentioned keeper, and rotates integratedly with above-mentioned keeper, and twin shaft shoulder stirring-head type instrument, this twin shaft shoulder stirring-head type instrument is by the first shaft shoulder portion, second shaft shoulder portion and the threaded formed between above-mentioned first shaft shoulder portion and above-mentioned second shaft shoulder portion are formed, above-mentioned first shaft shoulder portion comprises large-diameter portion, tapering and lower surface, above-mentioned tapering undergauge gradually downward, above-mentioned second shaft shoulder portion comprises large-diameter portion, tapering and upper surface, above-mentioned tapering undergauge gradually upward, above-mentioned first shaft shoulder portion is fixed on the front end of above-mentioned sliding axle, above-mentioned sliding axle slides in the axial direction relative to above-mentioned keeper, it is characterized in that, above-mentioned friction stirring connecting method has: docking operation, in this docking operation, the end face of above-mentioned metallic plate is docked each other, and bonding process, in this bonding process, the threaded of the above-mentioned twin shaft shoulder stirring-head type instrument of rotation is made to move to the docking section of above-mentioned end face being docked each other rear formation, above-mentioned end face is carried out friction-stir joint each other, in above-mentioned bonding process, in advance the distance between the first shaft shoulder portion and the second shaft shoulder portion is set as below the thickness of above-mentioned metallic plate, be out of shape when making above-mentioned metallic plate because of friction-stir, when making the position of above-mentioned metallic plate along above-mentioned twin shaft shoulder stirring-head type instrument axially displaced, above-mentioned twin shaft shoulder stirring-head type instrument moves vertically along with the displacement of above-mentioned metallic plate.

According to said method, by below the thickness that the distance between shaft shoulder portion is set as metallic plate, thus, the metal after making plastic flow automation because of friction-stir can be prevented to be spilled over to the outside in shaft shoulder portion.By this, the generation of joint defect can be suppressed.

In addition, it is preferable that, by in the described shaft shoulder, the diameter in face that contacts with described metallic plate sets X (mm), the external diameter of described threaded is set to Y (mm), the distance between described shaft shoulder portion is set to Z (mm) time, X, Y, Z meet, Y ²/ (X ²-Y ²) > 0.2, and Y ²/ (YZ) > 1.2.

According to said method, if Y ²/ (X ²-Y ²) be less than 0.2, then because threaded is comparatively thin, make tensile resistence not enough and cause easily fractureing, if but larger than 0.2, be then not easy to fracture because threaded is relatively thicker.If Y ²/ (YZ) is less than 1.2, then because threaded is comparatively thin, make fracture resistence force not enough and cause easily fractureing, if but larger than 1.2, be then not easy to fracture because threaded is relatively thicker.

In addition, it is preferable that, when above-mentioned end face gap is to each other set as below 1.00mm, the distance between the thickness of above-mentioned metallic plate and above-mentioned shaft shoulder portion is set to and meets 0.2mm≤{ (thickness of metallic plate)-(distance between shaft shoulder portion) }≤0.8mm.

In addition, it is preferable that, when above-mentioned end face gap being to each other set greater than 1.00mm and for below 1.75mm, the distance between the thickness of above-mentioned metallic plate and above-mentioned shaft shoulder portion being set to and meeting 0.4mm≤{ (thickness of metallic plate)-(distance between shaft shoulder portion) }≤0.8mm.

According to above-mentioned joint method, even if end face exists gap to each other, the generation of joint defect also can be suppressed.

In addition, it is preferable that, by the described shaft shoulder, the diameter in face that contacts with described metallic plate sets X (mm), the external diameter of described threaded is set to Y (mm) time, X, Y meet X ²/ Y ²> 2.0.

According to above-mentioned joint method, can by shaft shoulder portion, the face that contacts with above-mentioned metallic plate guarantees very large relative to the external diameter of threaded, therefore, it is possible to reliably press the metal of plastic flow automation between shaft shoulder portion.By this, the generation of joint defect can be suppressed further.If X ²/ Y ²be less than 2.0, then metal easily overflows, and easily produces joint defect.

In addition, it is preferable that, in above-mentioned bonding process, the thickness of the above-mentioned metallic plate of the part after docking is different, when above-mentioned metallic plate larger for the thickness of above-mentioned metallic plate is configured in left side relative to the direct of travel of above-mentioned twin shaft shoulder stirring-head type instrument, make above-mentioned twin shaft shoulder stirring-head type instrument towards right rotation.

In addition, it is preferable that, in above-mentioned bonding process, the thickness of the above-mentioned metallic plate of the part after docking is different, when above-mentioned metallic plate larger for the thickness of above-mentioned metallic plate is configured in right side relative to the direct of travel of above-mentioned twin shaft shoulder stirring-head type instrument, make above-mentioned twin shaft shoulder stirring-head type instrument towards anticlockwise.

In friction-stir engages, when making throw towards right rotation, the trend flowed towards the right side (flow side: the rotary speed of throw deducts the translational speed side of throw) of instrument direct of travel in the left side (shear side: the rotary speed of throw adds the translational speed side of throw) that the metal of plastic flow automation has a direct of travel from instrument, therefore, can think that hypothesis is when metallic plate exists gap to each other, the metal shearing side can the above-mentioned gap of landfill.Therefore, shear side if be configured in by metallic plate little for thickness, then metal is not enough and make the trend of the central portion less thick in the plastification region after joint.

But, when the end surface thickness of metallic plate is different, shears side by being configured at by metallic plate large for thickness, just can supplement metal deficiency, therefore, can more desirably engage.

Invention effect

According to friction stirring connecting method of the present invention, the generation of joint defect can be suppressed, and can engage ideally.In addition, according to the assembly of double face slab of the present invention and the friction stirring connecting method of double face slab, can ideally double face slab be engaged.

Accompanying drawing explanation

Fig. 1 is the side view of the friction-stir device of embodiment 1.

Fig. 2 is the I-I sectional view of Fig. 1.

Fig. 3 is the II-II sectional view of Fig. 2.

Fig. 4 (a) is the sectional view of sliding axle, and Fig. 4 (b) is the upward view of sliding axle, and Fig. 4 (c) is the side view of alignment pin (Japanese: ノッ Network ピ Application).

Fig. 5 is the figure in the first shaft shoulder portion representing embodiment 1, and wherein, Fig. 5 (a) is sectional view, and Fig. 5 (b) is upward view.

Fig. 6 is the figure in the second shaft shoulder portion representing embodiment 1, and wherein, Fig. 6 (a) is sectional view, and Fig. 6 (b) is top view.

Fig. 7 is the figure of the threaded representing embodiment 1, and wherein, Fig. 7 (a) is side view, and Fig. 7 (b) is top view.

Fig. 8 (a) is the sectional view of the variation in the first shaft shoulder portion representing embodiment 1, and Fig. 8 (b) is the sectional view of the variation in the second shaft shoulder portion representing embodiment 1.

Fig. 9 is the sectional view of the variation representing embodiment 1.

Figure 10 represents the friction-stir device of embodiment 2 and the stereogram of hollow material.

Figure 11 is the mated condition representing hollow material, wherein, before Figure 11 (a) represents docking, after Figure 11 (b) represents docking.

Figure 12 is the stereogram of the friction-stir device representing embodiment 2.

Figure 13 is the III-III sectional view of Figure 12.

Figure 14 is the IV-IV sectional view of Figure 12.

Figure 15 is the side view of the twin shaft shoulder stirring-head type instrument representing embodiment 2.

Figure 16 is the figure of the friction stirring connecting method representing embodiment 2, and wherein, Figure 16 (a) is sectional view, and Figure 16 (b) is the V-V end view drawing of Figure 16 (a).

Figure 17 is the side view of the twin shaft shoulder stirring-head type instrument representing embodiment 3.

Figure 18 is the sectional view of the friction stirring connecting method representing embodiment 3.

Figure 19 (a) represents the first variation of friction stirring connecting method, and Figure 19 (b) represents the second variation of friction stirring connecting method.

Figure 20 is the stereogram of the double face slab representing embodiment 4.

Figure 21 is the stereogram of the friction-stir device representing embodiment 4.

Figure 22 is the stereogram of the throw unit representing embodiment 4.

Figure 23 is the side view of the twin shaft shoulder stirring-head type instrument representing embodiment 4.

Figure 24 is the front view of the preparatory process of the friction stirring connecting method representing embodiment 4.

Figure 25 is the stereogram of the first bonding process of the friction stirring connecting method representing embodiment 4.

Figure 26 is the stereogram of the second bonding process of the friction stirring connecting method representing embodiment 4.

Figure 27 is the front view of the variation of the engaging form representing embodiment 4.

Figure 28 is the table of the combination of the test body represented in embodiment 1.

Figure 29 represents in embodiment 1, the figure of the relation between the gap of test body H1 and the thickness at junction surface.

Figure 30 represents in embodiment 1, the figure of the relation between the gap of test body H3 and the thickness at junction surface.

Figure 31 represents in embodiment 1, affects the table of the 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 32 is the table representing the relation affected between the plate thickness of bond quality and gap, it illustrates the varied in thickness that makes Ad side and by situation fixing for the thickness of Re side.

Figure 33 is the table representing the relation affected between the plate thickness of bond quality and gap, it illustrates and is fixed by the thickness of Ad side and make the situation of the varied in thickness of Re side.

Figure 34 (a) represents in embodiment 1, the table of the relation between the thickness in gap and Cr portion, and Figure 34 (b) represents in embodiment 1, the table of the relation between the thickness in gap and Ad portion.

Figure 35 (a) represents in embodiment 1, the table of the relation between the thickness in gap and Re portion, and Figure 35 (b) represents in embodiment 1, the figure of the relation between gap and average thickness.

Figure 36 represents in example 2, affects the figure of the 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 37 represents in embodiment 1, each size of twin shaft shoulder stirring-head type instrument and the table of connecting state when the distance between shaft shoulder portion being fixed as 5.8mm.

Figure 38 represents in example 2, each size of twin shaft shoulder stirring-head type instrument and the table of connecting state when the distance between shaft shoulder portion being fixed as 2.8mm.

Figure 39 represents in reference example, each size of twin shaft shoulder stirring-head type instrument and the table of connecting state when the distance between shaft shoulder portion being fixed as 11.5mm.

Figure 40 represents in embodiment 3, the figure of the impact (gap of docking section is 0mm) that the difference of height of screw thread ratio on metallic plate brings.

Figure 41 represents in embodiment 3, the figure of the impact (gap of docking section is 1.5mm) that the difference of height of screw thread ratio on metallic plate brings.

Figure 42 represents in embodiment 3, when the gap of docking section is different, and the figure in the plastification region of the metallic plate of condition A.

Figure 43 represents in embodiment 3, when the gap of docking section is different, and the figure in the plastification region of the metallic plate of condition B.

Figure 44 represents in embodiment 3, when the gap of docking section is different, and the figure in the plastification region of the metallic plate of condition C.

Figure 45 represents in embodiment 3, when the gap of docking section is different, and the figure in the plastification region of the metallic plate of condition D.

Figure 46 represents in embodiment 3, when the gap of docking section is different, and the figure in the plastification region of the metallic plate of condition E.

Figure 47 is the table after the result of embodiment 3 being gathered.

Figure 48 is by the table after making twin shaft shoulder stirring-head type instrument gather towards situation during anticlockwise.

Figure 49 represents the engaging form of embodiment 4 or the front view of docking form, and wherein, Figure 49 (a) represents type i, and Figure 49 (b) represents Type II, and Figure 49 (c) represents type-iii.

Figure 50 is the figure of the result of the angular deformation of the type i representing embodiment 4.

Figure 51 is the figure of the result of the angular deformation of the Type II representing embodiment 4.

Figure 52 is the figure of the result of the angular deformation of the type-iii representing embodiment 4.

Figure 53 is the table after the direction of rotation of the twin shaft shoulder stirring-head type instrument of embodiment 4, spiral fluted coiling direction, engaging form being gathered.

Figure 54 is the figure for representing embodiment 6, and Figure 54 (a) represents body to be tested, and Figure 54 (b) is the table after each condition being gathered.

Figure 55 is the figure representing the thickness of slab a of embodiment 6 and the incidence relation of length c.

Detailed description of the invention

[embodiment 1]

With reference to accompanying drawing, the friction-stir device of embodiment of the present invention is described in detail.As shown in Figure 1, the friction-stir device 300 of present embodiment is made up of chuck portion 301, the throw unit 302 be fixed in chuck portion 301.Friction-stir device 300 is that the throw unit 302 by making to be fixed on front end transfers device pair of metal plate (not shown) being carried out to friction-stir joint around axle high-speed rotary.

Chuck portion 301 is fixed on apparatus main body (not shown), and rotates around rotating shaft C.Chuck portion 301 cylindrically.

As shown in Figure 1, throw unit 302 is formed primarily of keeper 303, sliding axle 304 and twin shaft shoulder stirring-head type instrument 305.

Keeper 303 is fixed on the inner side in chuck portion 301, and rotates integratedly with chuck portion 301.Keeper 303 cylindrically.As shown in Figure 2, keeper 303 has a pair elongated hole 311 and tabular surface 312.Elongated hole 311 is to run through the radial direction of keeper 303 and mode respect to one another is arranged.The long side direction of elongated hole 311 is extended along the direction of rotating shaft C.

As shown in Figure 2, tabular surface 312 is arranged in a part for the outer peripheral face of keeper 303, its be along vertical be smooth face.As shown in Figure 3, keeper 303 is fixed by fixture 313 with chuck portion 301.Fixture 313 screws togather with the thread groove being formed at chuck portion 301, and its front end abuts with tabular surface 312.By this, chuck portion 301 is integrated with keeper 303 one-tenth, and rotates around rotating shaft C.

As shown in Figure 2, sliding axle 304 is the components being inserted into keeper 303 inside, and itself and keeper 303 rotate around rotating shaft C integratedly.Sliding axle 304 is made up of sliding body 321, alignment pin 322 and fixed component 323.

As shown in Figure 4, sliding axle main body 321 comprises through hole 324 through vertically and the pin-and-hole 325 through along direction orthogonal to the axial direction.Through hole 324 is formed in the position overlapping with the rotating shaft C of sliding body 321, and it comprises large-diameter portion 324a and large-diameter portion 324a continuous print minor diameter part 324b, the stage portion 324c formed by the difference of height between large-diameter portion 324a and minor diameter part 324b and junction surface 324d from upside.In minor diameter part 324b, more closer to the top than pin-and-hole 325 position is formed with thread groove (negative thread).Fixed component 323 screws togather with the position being formed with thread groove.

On the inner peripheral surface of junction surface 324d, be formed with thread groove (negative thread).Junction surface 324d is the position screwed togather with the first shaft shoulder portion 331 described later.As shown in Fig. 4 (a), figure (b), pin-and-hole 325 is orthogonal with minor diameter part 324b, and through sliding body 321.

As shown in Fig. 4 (c), alignment pin 322 comprises standard shaft portion 322a, eel-like figure portion 322b and tapering 322c.Eel-like figure portion 322b is the part that diameter is less than the diameter of other parts.Tapering 322c is formed at the two ends of standard shaft portion 322a, and attenuates towards end.

Fixed component 323 is the components for alignment pin 322 being fixed on sliding body 321.Fixed component 323 and minor diameter part 324b screw togather, and its front end abuts with the eel-like figure portion 322b of alignment pin 322.As shown in Figure 3, hexagonal groove is formed with at the head of fixed component 323.

As shown in Figure 2, under the state that sliding axle 304 is positioned at elongated hole 311,311 at the two ends of alignment pin 322, the inside of keeper 303 is inserted into.

As shown in Figure 2, twin shaft shoulder stirring-head type instrument 305 is the components engaged with the front end of sliding axle 304, and it is formed primarily of the first shaft shoulder portion 341 of shaft shoulder portion 331, second, threaded 351, first securing member 371 and the second securing member 372.First shaft shoulder portion 331 and the configuration separated from one another of the second shaft shoulder portion 341, and linked by threaded 351.

As shown in Fig. 5 (a), the first shaft shoulder portion 331 comprises the first large-diameter portion 332, first minor diameter part 333 and is formed at the first inner hollow bulb 334.First large-diameter portion 332 and the first minor diameter part 333 are all in roughly cylindric.First large-diameter portion 332 has the external diameter larger than the first minor diameter part 333.As shown in Fig. 5 (b), be formed at the lower surface 332a of the first large-diameter portion 332 and carve around rotating shaft C the groove 332b established in the shape of a spiral.The cross sectional shape semicircular in shape shape of groove 332b.The thread groove (pin thread) screwed togather with the junction surface 324d of sliding axle 304 is formed at the outer peripheral face of the first minor diameter part 333.

First hollow bulb 334 is the positions of inserting for threaded 351, and it is through in the vertical direction.First hollow bulb 334 has the first lower-side hole 335, first inboard aperture 336, first connecting hole 337, first inboard aperture 338 and the first upper-side hole 339 from downside.First lower-side hole 335, first inboard aperture 336, first inboard aperture 338 and the first upper-side hole 339 all have columned inner space.The internal diameter of the first lower-side hole 335 is larger than the internal diameter of the first inboard aperture 336.The internal diameter of the first upper-side hole 339 is larger than the internal diameter of the first inboard aperture 338.First connecting hole 337 has the inner space of roughly quadrangular shape.In the present embodiment, the horizontal cross sectional geometry of the first connecting hole 337 is roughly square, but also can be other polygon.

As shown in Fig. 6 (a), Fig. 6 (b), the second shaft shoulder portion 341 comprises the second large-diameter portion 342, second minor diameter part 343 and is formed at the second inner hollow bulb 344.Be formed towards multiple (being three in the present embodiment) recessed bar 342a of inner side depression at the outer peripheral face of the second large-diameter portion 342.The upper surface 342b of the second large-diameter portion 342 is formed and carves around rotating shaft C the groove 342c established in the shape of a spiral.The cross sectional shape of groove 342c is semi-circular shape.

Second hollow bulb 344 is the positions of inserting for threaded 351, and it is through in the vertical direction.Second hollow bulb 344 has the second upper-side hole 345, second inboard aperture 346, second connecting hole 347 and the second lower-side hole 348 from upside.Second lower-side hole 345, second inboard aperture 346 and the second lower-side hole 348 all have columned inner space.The internal diameter of the second upper-side hole 345 is larger than the internal diameter of the second inboard aperture 346.Second connecting hole 347 has the inner space of roughly quadrangular shape.In the present embodiment, the horizontal cross sectional geometry of the second connecting hole 347 is roughly square, but also can be other polygon.

As shown in Figure 2, threaded 351 is the components linked in the first shaft shoulder portion 331 and the second shaft shoulder portion 341.As shown in Fig. 7 (a), Fig. 7 (b), threaded 351 is in symmetrical up and down, and centre is formed with helical groove portion 352 wherein.The upside of helical groove portion 352 is the positions being inserted into the first shaft shoulder portion 331, and downside is the position being inserted into the second shaft shoulder portion 341.The upside of helical groove portion 352 has first diameter section 353, first axle portion, front end of little diameter section 354, first engagement shaft portion 355, first 356.The downside of helical groove portion 352 has second largest diameter section 357, second axle portion, front end of little diameter section 358, second engagement shaft portion 359, second 360.

Helical groove portion 352 is for being the part from exposing between the first shaft shoulder portion 331 and the second shaft shoulder portion 341, and it is the position being inserted into the metallic plate (not shown) that will engage.The outer peripheral face of helical groove portion 352 is carved with helicla flute.In the present embodiment, be carved with right-hand thread in the first half of helical groove portion 352, the latter half is carved with left-hand thread.Be engraved in the spiral fluted direction of rotation on helical groove portion 352, the ratio of right-hand thread and left-hand thread, cross sectional shape suitably can set according to the different of the metallic plate that will engage.

First diameter section 353 is in cylindric.The external diameter of first diameter section 353 is larger than the external diameter of helical groove portion 352.First diameter section 353 is the positions of the first lower-side hole 335 being inserted into the first shaft shoulder portion 331 shown in Fig. 5 (a).

First little diameter section 354 is in cylindric.The external diameter of the first little diameter section 354 is less than the external diameter of first diameter section 353.First little diameter section 354 is the positions of the first inboard aperture 336 being inserted into the first shaft shoulder portion 331 shown in Fig. 5 (a).

First engagement shaft portion 355 is in quadrangular shape.The horizontal cross sectional geometry in the first engagement shaft portion 355 is roughly square.The external diameter of the catercorner length in the horizontal cross-section in the first engagement shaft portion 355 and the first little diameter section 354 is roughly equal.First engagement shaft portion 355 is the positions closely engaged with first connecting hole 337 in the first shaft shoulder portion 331 Fig. 5 (a) Suo Shi.

First axle portion, front end 356 is in cylindric.The external diameter of the first axle portion, front end 356 is less than the length on a limit of the horizontal cross-section in the first engagement shaft portion 355.Thread groove (pin thread) is formed at the outer peripheral face in the first axle portion, front end 356.First axle portion, front end 356 is the positions being inserted into the first inboard aperture 338 shown in Fig. 5 (a) and the first upper-side hole 339.

Second largest diameter section 357 is in cylindric.The external diameter of second largest diameter section 357 is larger than the external diameter of helical groove portion 352.Second largest diameter section 357 is the positions of the second upper-side hole 345 being inserted into the second shaft shoulder portion 341 shown in Fig. 6 (a).

Second little diameter section 358 is in cylindric.The external diameter of the second little diameter section 358 is less than the external diameter of second largest diameter section 357.Second little diameter section 358 is the positions of the second inboard aperture 346 being inserted into the second shaft shoulder portion 341 shown in Fig. 6 (a).

Second engagement shaft portion 359 is in quadrangular shape.The horizontal cross sectional geometry in the second engagement shaft portion 359 is roughly square.The external diameter of the catercorner length in the horizontal cross-section in the second engagement shaft portion 359 and the second little diameter section 358 is roughly equal.Second engagement shaft portion 359 is the positions closely engaged with second connecting hole 347 in the second shaft shoulder portion 341 shown in Fig. 6 (a).

Second axle portion, front end 360 is in cylindric.The external diameter of the second axle portion, front end 360 is less than the length on a limit of the horizontal cross-section in the second engagement shaft portion 359.The outer peripheral face in the second axle portion, front end 360 is formed with thread groove (pin thread).Second axle portion, front end 360 is the positions being inserted into the second lower-side hole 348 shown in Fig. 6 (a).

Then, to the assemble method of each component.First, with reference to Fig. 2, Fig. 5 ~ Fig. 7, the assemble method of twin shaft shoulder stirring-head type instrument 305 is described.First axle portion, front end 356 of threaded 351 is inserted the first shaft shoulder portion 331, the first engagement shaft portion 355 is engaged with the first connecting hole 337.Then, at the first upper-side hole 339 place, the first securing member 371 is used to be linked in the first axle portion, front end 356.

On the other hand, the second shaft shoulder portion 341 is inserted in the second leading section 360 of threaded 351, the second engagement shaft portion 359 is engaged with the second connecting hole 347.Then, at the lower surface in the second shaft shoulder portion 341, the second securing member 372 is used to be linked in the second axle portion, front end 360.First connecting hole 337 and the first engagement shaft portion 355, second connecting hole 347 and the second engagement shaft portion 359 (overlook in being polygon) in prism-shaped, therefore, can not engage with dallying each other.

After twin shaft shoulder stirring-head type instrument 305 is installed, first minor diameter part 333 in the first shaft shoulder portion 331 is screwed togather the junction surface 324d to sliding axle 304, engaging slide axle 304 and twin shaft shoulder stirring-head type instrument 305.

Then, sliding axle 304 is inserted keeper 303, while make elongated hole 311,311 be communicated with pin-and-hole 325, alignment pin 322 is inserted.Then, fixed component 323 is inserted the through hole 324 of sliding body 321, and use not shown die nut that fixed component is fastening.

Finally, keeper 303 is inserted chuck portion 301, while use fixture 313 to be fixed with chuck portion 301 by keeper 303.

According to throw unit 302 described above, the sliding axle 304 being provided with twin shaft shoulder stirring-head type instrument 305 moves vertically relative to keeper, and therefore, twin shaft shoulder stirring-head type instrument 305 also can move along with the distortion of metallic plate vertically.By this, metallic plate can be prevented to be out of shape and to cause bonding station to depart from, therefore, it is possible to suppress the generation of joint defect.In addition, because the alignment pin 322 being fixed on sliding axle 304 is inserted in a pair elongated hole 311 of keeper 303, therefore, it is possible to make sliding axle 304 stably move.

In addition, the sliding axle 304 of present embodiment has through hole 324 through vertically, and that for alignment pin 322 insert pin-and-hole 325 orthogonal with through hole 324, and fixed component 323 inserts through hole 324, and its front end abuts with alignment pin 322.In addition, be formed with the eel-like figure portion 322b thinner than other parts at the central portion of alignment pin 322, the front end of fixed component 323 abuts with eel-like figure portion 322b.By this, reliably alignment pin 322 can be fixed on sliding axle 304 with simple mouth steel billet.

In addition, according to the present embodiment, by first minor diameter part 333 in the first shaft shoulder portion 331 and the junction surface 324d being formed at sliding axle 304 front end being screwed togather or removed screwing togather of the first minor diameter part 333 and junction surface 324d, just can freely install and remove.By this, replacing and the maintenance of twin shaft shoulder stirring-head type instrument 305 can easily be carried out.

In addition, twin shaft shoulder stirring-head type instrument 305 needs along with the difference of the plate thickness that will engage or kind changes the first shaft shoulder portion 331 and the distance in the second shaft shoulder portion 341, the thickness of threaded 351.In addition, shaft shoulder portion 341 of replacing first shaft shoulder portion 331, second and threaded 351 is needed because of wearing and tearing.According to the present embodiment, the first shaft shoulder portion 331 of twin shaft shoulder stirring-head type instrument 305 and the second shaft shoulder portion 341 can easily install and remove relative to threaded 351, therefore, it is possible to easily carry out replacing and the maintenance of each component.

In addition, the lower surface 332a in the first shaft shoulder portion 331 and upper surface 342b in the second shaft shoulder portion 341 is formed with groove 332b, the groove 342c that the rotating shaft C around twin shaft shoulder stirring-head type instrument 305 is formed in the shape of a spiral respectively.By this, friction-stir efficiency can be improved.

Above, embodiments of the present invention are illustrated, but in the scope not violating present inventive concept, suitably can design change.Such as, the groove be arranged on the lower surface 331a in the first shaft shoulder portion 331 and upper surface 341b in the second shaft shoulder portion 341 also can only be arranged in any one in lower surface 331a and upper surface 341b, also can omit groove.

In addition, as long as the shape engagement shaft portion in the first connecting hole 337 and the first engagement shaft portion 355, second connecting hole 347 and the second engagement shaft portion 359 can not rotate relative to connecting hole, then can be arbitrary shape.Such as, also any one in connecting hole and engagement shaft portion can form key, and form keyway on the other.

Fig. 8 (a) is the sectional view of the variation in the first shaft shoulder portion representing embodiment 1, and Fig. 8 (b) is the sectional view of the variation in the second shaft shoulder portion representing embodiment 1.Fig. 9 is the sectional view of the variation representing embodiment 1.As shown in Figure 8, in the variation of embodiment 1, on the locking screw of use first 473 and second this aspect of locking screw 474, different from the embodiment described above.The twin shaft shoulder stirring-head type instrument 405 of variation is primarily of the first shaft shoulder portion 441 of shaft shoulder portion 431, second, threaded 451, first securing member 471, second securing member 472, first locking screw 473 and the second locking screw 474.

As shown in Fig. 8 (a), the first shaft shoulder portion 431 comprises the first large-diameter portion 432, first minor diameter part 433, is formed at the first inner hollow bulb 434 and the locking elongated hole of the first screw (Japanese: a ネジ Department tires out hole) 438.First large-diameter portion 432 is in roughly cylindric, and its lower end side attenuates towards front end.First minor diameter part 433 is in roughly cylindric.The external diameter of the first minor diameter part 433 to the first large-diameter portion 432 is little.The outer peripheral face of the first minor diameter part 433 is formed the thread groove (pin thread) screwed togather with the junction surface 324d of sliding axle 304.In addition, also groove can be set on the lower surface 432a of the first large-diameter portion 432.

First hollow bulb 434 is the positions of inserting for threaded 451, and it is through in the vertical direction.First hollow bulb 434 has the first lower-side hole 435, first inboard aperture 436 and the first upper-side hole 437 from downside.First lower-side hole 435 is the positions in " the first hole " be equivalent in claims.First lower-side hole 435, first inboard aperture 436 and the first upper-side hole 437 all have columned inner space.The internal diameter of the first inboard aperture 436, first lower-side hole 435, first upper-side hole 437 increases successively.

The locking elongated hole of first screw 438 is extended towards rotating shaft C direction from the side of the first large-diameter portion 432, and is communicated with the first lower-side hole 435.In the locking elongated hole 438 of the first screw by rotating shaft C side, be formed with thread groove (negative thread).

As shown in Fig. 8 (b), the second shaft shoulder portion 441 comprises the second main part 442, is formed at the second inner hollow bulb 444 and the locking elongated hole 447 of the second screw.The outer peripheral face of the second main part 442 is formed towards multiple (being four in the present embodiment) recessed bar 442a of inner side depression.In addition, also groove can be set on the upper surface 442b of the second main part 442.

Second hollow bulb 444 is the positions of inserting for threaded 451, and it is through in the vertical direction.Second hollow bulb 444 has the second upper-side hole 445 and the second lower-side hole 446 from upside.Second upper-side hole 445 is the positions in " the second hole " be equivalent in claims.Second upper-side hole 445 and the second lower-side hole 446 all have columned inner space.The internal diameter of the second upper-side hole 445 is larger than the internal diameter of the second lower-side hole 446.

The locking elongated hole of second screw 447 is extended towards rotating shaft C direction from the side of the second main part 442, and is communicated with the second upper-side hole 445.In the locking elongated hole 447 of the second screw, be formed with thread groove (negative thread) by rotating shaft C side.

As shown in Figure 9, threaded about 451 is symmetrical, and centre is formed with helical groove portion 452 wherein.Helical groove portion 452 is the parts from exposing between the first shaft shoulder portion 431 and the second shaft shoulder portion 441.The upside of helical groove portion 452 has first diameter section 453 and the first little diameter section 454.The downside of helical groove portion 452 has second largest diameter section 455 and the second little diameter section 456.

First diameter section 453 and the first little diameter section 454 are all in roughly cylindric.The external diameter of first diameter section 453 is larger than the external diameter of the first little diameter section 454.First diameter section 453 is inserted into the position in the first lower-side hole 435 shown in Fig. 8 (a).The first par 453a as tabular surface is formed at the outer peripheral face of first diameter section 453.First diameter section 453 is the positions of " the first axle part " be equivalent in claims.First little diameter section 454 is inserted into the position in the first inboard aperture 436 and the first upper-side hole 437.Thread groove (pin thread) is formed in the front end of the first little diameter section 454.

Second largest diameter section 455 and the second little diameter section 456 are all in roughly cylindric.The external diameter of second largest diameter section 455 is larger than the external diameter of the second little diameter section 456.Second largest diameter section 455 is inserted into the position in the second upper-side hole 445 shown in Fig. 8 (b).The second par 455a as tabular surface is formed at the outer peripheral face of second largest diameter section 455.Second largest diameter section 455 is the positions of " the second axle part " be equivalent in claims.Second little diameter section 456 is inserted into the position in the second lower-side hole 446.Thread groove (pin thread) is formed in the front end of the second little diameter section 456.

Then, the assemble method of the twin shaft shoulder stirring-head type instrument 405 of variation is described.As shown in Figure 8, Figure 9, first, the first diameter section 453 of threaded 451 and the first little diameter section 454 are inserted the first shaft shoulder portion 431.Then, the first locking screw 473 and the locking elongated hole 438 of the first screw are screwed togather, makes the front end of the first locking screw 473 abut with the first par 453a of first diameter section 453 simultaneously.Then, the first securing member 471 is fastened in the first little diameter section 454.

On the other hand, the second largest diameter section 455 of threaded 451 and the second little diameter section 456 are inserted the second shaft shoulder portion 441.Then, the second locking screw 474 and the locking elongated hole 447 of the second screw are screwed togather, make the front end of the second locking screw 474 abut with the second par 455a of second largest diameter section 455 simultaneously.Then, the second securing member 472 is fastened to the second little diameter section 456.

After twin shaft shoulder stirring-head type instrument 405 is assembled, first minor diameter part 433 in the first shaft shoulder portion 431 is screwed togather with the junction surface 324d of sliding axle 304, sliding axle 304 is engaged with twin shaft shoulder stirring-head type instrument 405.

In variation described above, also can realize the effect roughly the same with above-mentioned embodiment.When threaded 451 is integrated with the first shaft shoulder portion 431 and the second shaft shoulder portion 441, first locking screw 473 and the second locking screw 474 are screwed togather, make the front end of the first locking screw 473 abut with the first par 453a simultaneously, and the front end of the second locking screw 474 is abutted with the second tabular surface 455a, by this, threaded 451 and the relative rotation between the first shaft shoulder portion 431 and the second shaft shoulder portion 441 can easily be limited.In addition, as long as the first locking screw 473 and the second locking screw 474 are removed, just can easily threaded 451 be decomposed with the first shaft shoulder portion 431 and the second shaft shoulder portion 441.Therefore, the replacing of component and maintenance can be made to become easy.

In variation, also the non-circular connecting hole of cross section can be set in the inside in the first shaft shoulder portion 431 and the second shaft shoulder portion 441, a part simultaneously in the axle portion of threaded 451 arranges the engagement shaft portion in column, and this connecting hole and engagement shaft portion are engaged with each other.By this, threaded 451 and the relative rotation between the first shaft shoulder portion 431 and the second shaft shoulder portion 441 can reliably be limited.

[embodiment 2]

Below, with reference to accompanying drawing, embodiment of the present invention 2 is described in detail.As shown in Figure 10, the friction-stir device 1 of present embodiment is the device docking section N of the pair of metal plate after docking being carried out to friction-stir joint.Twin shaft shoulder stirring-head type instrument 5 is installed in the front end of friction-stir device 1.First, the pair of metal plate that engage is described.Upper and lower, front, rear, left and right in explanation are according to the direction of arrow of Figure 10.

< hollow material >

As shown in Figure 11 (a), in the present embodiment, exemplified with the situation that hollow material 100A is engaged with hollow material 100B.Hollow material 100A is the extrded material of aluminum alloy, and is the strip component of the hollow bulb 100a with rectangular in cross-section.Hollow material 100A have comprise hollow bulb 100a main part 101, from the left surface upper and lower side of main part 101 respectively towards the plate-shaped end 102,103 that left side (hollow material 100B side) stretches out.

Main part 101 is made up of four plane materiel material 104,105,106,107, and its cross section is formed as rectangle.Plate-shaped end 102,103 is tabular, and perpendicular to plane materiel material 105.The left and right directions length of plate-shaped end 102,103 is about the half of plane materiel material 104.In addition, the thickness of plate-shaped end 102,103 is identical with the thickness of plane materiel material 104,105,106,107.Plate-shaped end 102,103 is the positions of " metallic plate " be equivalent in claims.

Hollow material 100B has the hardware with hollow material 100A same shape.Hollow material 100B marks the symbol identical with hollow material 100A, and detailed.

When hollow material 100A docks with hollow material 100B, the plate-shaped end 102,103 of hollow material 100A is docked respectively with the plate-shaped end 102,103 of hollow material 100B.In more detail, the end face 102a of the plate-shaped end 102 of hollow material 100A is docked with the end face 102a of the plate-shaped end 102 of hollow material 100B, the end face 103a of the plate-shaped end 103 of hollow material 100A is docked with the end face 103a of the plate-shaped end 103 of hollow material 100B.As shown in Figure 11 (b), when making hollow material 100A dock with hollow material 100B, the center of the short transverse of end face 102a, 102a overlaps each other, and, each upper surface flush of plate-shaped end 102,102, each lower surface of plate-shaped end 102,102 flushes.

As shown in Figure 11 (b), the part after docking making end face 102a with end face 103a with end face 102a, end face 103a is called " docking section N ".When docking section N is engaged, preferably make end face 102a and end face 102a close contact, but sometimes because of the tolerance of hollow material 100A, 100B or frictional heat when engaging, plate-shaped end 102,102 is deformed, and produce tiny gap between end face 102a and end face 102a.Docking section N is the concept comprising the situation producing slight gap between end face 102a and end face 102a.

In the present embodiment, exemplified with using the plate-shaped end of hollow material as the object that will engage, but the object that will engage is by can the metal of friction-stir be formed, as long as be the component of tabular, is not particularly limited.

< friction-stir device >

As shown in figure 12, friction-stir device 1 is formed primarily of chuck portion 1a and the throw unit 2 being fixed on 1a inside, chuck portion.As shown in figure 13, chuck portion 1a is the cylindrical structural member comprising flange, and uses screw B1 and be connected with the main body D of friction-stir device 1.Chuck portion 1a is the position being rotated by the driving of friction-stir device 1 and pivot.Barrel surface 1b is formed in the inner circumferential of chuck portion 1a.

As shown in figure 13, throw unit 2 is made up of keeper 3, sliding axle 4, twin shaft shoulder stirring-head type instrument 5.Throw unit 2 can be installed and removed relative to chuck portion 1a.

Keeper 3 is the components being built-in with sliding axle 4 and being fixed on 1a inside, chuck portion.Keeper 3 cylindrically.Be formed along the flatly extended tabular surface 3a of above-below direction at the outer surface of keeper 3, therefore, between barrel surface 1b and tabular surface 3a, form tiny gap.Bolt 2B, 2B carry out fastening from the outer surface of chuck portion 1a towards radial direction, and its front end abuts with tabular surface 3a.By this, chuck portion 1a and keeper 3 rotate integratedly.In addition, as shown in figure 14, keeper 3 is formed with the keyway 3b of radially through elongated hole-shape.

As shown in figure 13, cylindrically, it is the component of the hollow bulb being configured at keeper 3 to sliding axle 4.Sliding axle 4 can move in the vertical direction relative to keeper 3.As shown in figure 14, be formed towards key 4a protruding outside at the outer surface of sliding axle 4.Key 4a engages with keyway 3b, and by this, keeper 3 and sliding axle 4 rotate integratedly.

As shown in figure 15, 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 type 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 stirring-head type instrument 5 has the first shaft shoulder portion 11, in the below in the first shaft shoulder portion 11 across spaced second shaft shoulder portion 12, threaded 13 that the first shaft shoulder portion 11 and the second shaft shoulder portion 12 are linked.

First shaft shoulder portion 11 and the second shaft shoulder portion 12 in cylindric, and have identical external diameter.First shaft shoulder portion 11 and the second shaft shoulder portion 12 in cylindric, and link by threaded 13.Through second shaft shoulder portion 12 of threaded 13.The threaded 13 in through second shaft shoulder portion 12 passes through fastening nuts in the lower end in the second shaft shoulder portion 12.Top helicla flute 13a and lower part helical groove 13b is carved with at the outer peripheral face of threaded 13.The groove direction of top helicla flute 13a and lower part helical groove 13b is carved in the mode reeled towards opposite directions and is established.

Top helicla flute 13a carves the centre position of the short transverse of establishing to threaded 13 from the lower end of the first shoulder axle 11.In the present embodiment, make twin shaft shoulder stirring-head type instrument 5 towards right rotation, therefore, top helicla flute 13a is formed in the mode of right-hand thread.That is, helicla flute 13a in top carves in the mode from the top down towards right side winding to establish.

On the other hand, lower part helical groove 13b carves the centre position of the short transverse of establishing to threaded 13 from the upper end of the second shoulder axle 12.In the present embodiment, make twin shaft shoulder stirring-head type instrument 5 towards right rotation, therefore, lower part helical groove 13b is formed in the mode of left-hand thread.That is, lower part helical groove 13b carves in the mode from the top down towards left winding to establish.

By forming top helicla flute 13a and lower part helical groove 13b as mentioned above, the metal through friction-stir after plastic flow automation just can extreme direction or lower extreme direction move slightly upward from the middle body of the short transverse of plate-shaped end 102.In addition, the above-mentioned metal towards above-below direction moves and the rotation of the threaded 13 because of twin shaft shoulder stirring-head type instrument 5 and make compared with metal movement in the circumferential direction, is only trace.

For spiral fluted coiling direction or carve the ratio of establishing, as long as suitably set according to the decorative cover of the metallic plate that will engage and 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.In the present embodiment, though double thread pin 13 is provided with right-hand thread and these two kinds of helicla flutes of left-hand thread quarter, also can all carves the helicla flute establishing right-hand screw by double thread pin 13, or all carve the helicla flute establishing left-hand screw.In addition, in the present embodiment, establish right-hand thread though carve in the first side, shaft shoulder portion 11, carve in the second side, shaft shoulder portion 12 and establish left-hand thread, also can carve in the first side, shaft shoulder portion 11 and establish left-hand thread, carve in the second side, shaft shoulder portion 12 and establish right-hand thread.

As shown in figure 15, it is preferable that, make the distance Z (length of the exposed portion of threaded 13) between the shaft shoulder portion of twin shaft shoulder stirring-head type instrument 5 same or less than the thickness T of the plate-shaped end 102 of hollow material 100A with the thickness T-phase of the plate-shaped end 102 of hollow material 100A.Such as, in the present embodiment, the 0.2mm less of the thickness T of the plate-shaped end 102 of hollow material 100A of the distance Z between shaft shoulder portion.

In addition, when the gap of end face 102a, 102a of docking section N (with reference to Figure 11 (b)) being set as below 0.75mm, even if the thickness T of plate-shaped end 102 is set as identical with the spacing Z in shaft shoulder portion, i.e. T-Z=0, also can obtain good engagement state.

In addition, when the gap of end face 102a, 102a of docking section N being set as below 1.00mm, it is preferable that, the thickness T of the plate-shaped end 102 and spacing Z in shaft shoulder portion is set as 0.2mm≤T-Z≤0.8mm.

When the gap of end face 102a, 102a of docking section N being set greater than 1.00mm and for below 1.75mm, it is preferable that, the thickness T of the plate-shaped end 102 and spacing Z in shaft shoulder portion is set as 0.4mm≤T-Z≤0.8mm.

In addition, it is preferable that, twin shaft shoulder stirring-head type instrument 5 is set to make the square value of the external diameter X (diameter in the face contacted with plate-shaped end 102) in the first shaft shoulder portion 11 and the second shaft shoulder portion 12 larger than 2.0 divided by the value after the square value of the external diameter Y of threaded 13.According to above-mentioned twin shaft shoulder stirring-head type instrument 5, the first shaft shoulder portion 11 and the second shaft shoulder portion 12 can be utilized to suppress the quantity of material of discharging as burr, therefore, the generation of joint defect can be reduced.

In addition, it is preferable that, twin shaft shoulder stirring-head type instrument 5 is set to the value obtained after the square value of the external diameter X (diameter in the face contacted with plate-shaped end 102) in the first shaft shoulder portion 11 and the second shaft shoulder portion 12 deducts the square value of the external diameter Y of threaded 13, and makes the square value of the external diameter Y of threaded 13 larger than 0.2 divided by the value after value obtained above.According to above-mentioned twin shaft shoulder stirring-head type instrument 5, when can guarantee fully to engage, threaded is relative to the tensile resistence of the material resistance axially produced at instrument, therefore, can prevent the breakage of threaded 13.

In addition, it is preferable that, twin shaft shoulder stirring-head type instrument 5 is set to and makes the square value of the external diameter Y of threaded 13 take advantage of the value after the distance Z between shaft shoulder portion larger than 1.2 divided by the external diameter Y of threaded 13.According to above-mentioned twin shaft shoulder stirring-head type instrument 5, when can fully guarantee to engage, threaded is relative to the fracture resistence force of the material resistance flowed along the direction contrary with instrument direct of travel, therefore, can prevent the breakage of threaded 13.For above-mentioned basis, will be recorded in an embodiment.

At this, when carrying out friction-stir and engaging, make because of frictional heat the temperature of plate-shaped end 102,102 increase sometimes, and make plate-shaped end 102,102 upward or below warpage.In the friction-stir device 1 of present embodiment, because sliding axle 4 is formed as to move relative to keeper 3, therefore, plate-shaped end 102 such as upward warpage time, twin shaft shoulder stirring-head type instrument 5 can move predetermined distance upward along with above-mentioned warpage.On the other hand, plate-shaped end 102 downward warpage time, twin shaft shoulder stirring-head type instrument 5 can move predetermined distance downward along with above-mentioned warpage.By this, twin shaft shoulder stirring-head type instrument 5 in friction-stir engages can be suppressed to offset relative to the position of metallic plate.

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

In the joint method of embodiment 2, twin shaft shoulder stirring-head type instrument 5 is transferred towards dextrorotation and engages.Specifically, in this joint method, carry out the docking operation that hollow material is docked each other and bonding process twin shaft shoulder stirring-head type instrument 5 being inserted docking section N.At this, surperficial Sa is set as decorative cover.

In docking operation, as shown in figure 11, the plate-shaped end 102 making hollow material 100A and hollow material 100B toward each other, makes end face 102a contact with end face 103a face with end face 102a, end face 103a.In more detail, contact with the mode face of the mid point overlap of the end face 102a of the mid point with the opposing party that make the end face 102a of a side.After docking, can be engaged by modes such as welding along docking section N temporarily, and make hollow material 100A and hollow material 100B not separated.After making hollow material 100A dock with hollow material 100B, it both is fixedly made not move.

In bonding process, first, in the outside of docking section N, the center 13c of threaded 13 is made to be positioned at the position overlapping with the center Nc of docking section N.Then, as shown in figure 16, the twin shaft shoulder stirring-head type instrument 5 of right rotation is made to move along docking section N.After twin shaft shoulder stirring-head type instrument 5 inserts docking section N, utilize the metal around the threaded 13 double thread pin 13 of High Rotation Speed to carry out friction-stir, and make integration between plate-shaped end 102.The track of threaded 13 is formed plastification region W.

According to the joint method of present embodiment described above, even if make plate-shaped end (metallic plate) 102,102 warpage because of the frictional heat of friction-stir joint, twin shaft shoulder stirring-head type instrument 5 also can move along with above-mentioned warpage in the vertical direction swimmingly.By this, the height and position of the center 13c of threaded 13 and the center Nc of docking section N can be suppressed to offset.Therefore, can prevent bonding station from offseting.

In addition, as this present embodiment, by the distance Z between the shaft shoulder portion of twin shaft shoulder stirring-head type instrument 5 being set as below the thickness T of plate-shaped end 102, just can press the metal of plastic flow automation, therefore, the metal of the plastic flow automation because of friction-stir can be prevented to be spilled over to the outside in the first shaft shoulder portion 11 and the second shaft shoulder portion 12.By this, the generation of joint defect can be suppressed.In addition, if the value of T-Z is more than 0.8, then can increase the load to friction-stir device 1, therefore, improper.

In addition, according to joint method, the metal of the liquidation through friction-stir is guided by the lower part helical groove 13b of the top helicla flute 13a of the right-hand thread of threaded 13 and left-hand thread, and moves towards surperficial Sa side and Sb side, the back side respectively from the center Nc of plate-shaped end 102.Due to right-hand thread top helicla flute 13a with more than 25% ratio formed, therefore, the metal caused by above-mentioned helicla flute 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 from entering too far into surface (decorative cover) Sa.By this, can prevent decorative cover from producing groove V, even if or produce the degree of depth that groove V also can reduce groove V.Produce by preventing groove V or reduce the degree of depth of groove V, just easily can carry out the fine finishining process making surface (decorative cover) Sa become level and smooth.

In addition, in embodiment 2, the ratio of top helicla flute 13a and lower part helical groove 13b is 50:50, therefore, as shown in Figure 16 (a), can make at the amount of metal of the upper side and lower side movement impartial.By this, can prevent the position of the center 13c of threaded 13 and the center Nc of docking section N from offseting further.In addition, be provided with top helicla flute 13a and lower part helical groove 13b owing to carving, therefore, the stirring efficiency of friction-stir can be improved.

When carrying out bonding process, it is preferable that, engaging while such as utilizing surface (decorative cover) Sa of cooling device to plate-shaped end 102 that can supply cooled gas or liquid etc. to cool.By this, the distortion of plate-shaped end 102 can be suppressed and joining accuracy is improved.In addition, also can engage while the Sb side, the back side of plate-shaped end 102 is cooled.

In addition, even if use the throw unit 302 of embodiment 1 to replace the throw unit 2 of embodiment 2, also the effect roughly the same with embodiment 2 can be obtained.

[embodiment 3]

In the joint method of embodiment 3, spiral fluted structure and the direction of rotation of twin shaft shoulder stirring-head type instrument are different from embodiment 2.In the explanation of embodiment 3, for the point identical with embodiment 2, detailed.

Figure 17 is the side view of the twin shaft shoulder stirring-head type instrument representing embodiment 3.As shown in figure 17, the lower part helical groove 13b of the top helicla flute 13a being provided with the left-hand thread being formed in the first half and the right-hand thread being formed in Lower Half is carved at the outer peripheral face of the threaded 13 of the twin shaft shoulder stirring-head type instrument 5A of embodiment 3.That is, top helicla flute 13a carves in the mode from the top down towards left winding and establishes, and lower part helical groove 13b carves in the mode from the top down towards right winding and establishes.

It is preferable that, distance (length of the exposed portion of the threaded 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 hollow material 100A.Such as, in the present embodiment, the 0.4mm less of the thickness of slab T of the plate-shaped end 102 of hollow material 100A of the distance Z between shaft shoulder portion.

Then, the joint method of the twin shaft shoulder stirring-head type instrument 5A using embodiment 3 is described.

In the joint method of embodiment 3, as shown in figure 18, twin shaft shoulder stirring-head type instrument 5A is made to engage towards left-handed transferring.Specifically, in above-mentioned joint method, carry out the docking operation that hollow material is docked each other and bonding process twin shaft shoulder stirring-head type instrument 5A being inserted docking section N.At this, surperficial Sa is set as decorative cover.Because docking operation is identical with embodiment 2, therefore, omit the description.

In bonding process, first, in the outside of docking section N, the center 13c of threaded 13 is made to be positioned at the position overlapping with the center Nc of docking section N.Then, as shown in figure 18, the twin shaft shoulder stirring-head type instrument 5A of anticlockwise is made to move along docking section N.After twin shaft shoulder stirring-head type instrument 5A is inserted docking section N, utilize the metal around the threaded 13 double thread pin 13 of High Rotation Speed to carry out friction-stir, and plate-shaped end 102 is integrated with each other.The track of threaded 13 is formed plastification region W.

According to above-mentioned joint method, the metal of the liquidation through friction-stir is guided by the lower part helical groove 13b of the top helicla flute 13a of the left-hand thread of threaded 13 and right-hand thread, and moves towards surperficial Sa side and Sb side, the back side respectively from the center Nc of plate-shaped end 102.Due to left-hand thread top helicla flute 13a with more than 25% ratio formed, therefore, the metal caused by helicla flute moves and twin shaft shoulder stirring-head type instrument 5A can be made to promote towards sliding axle 4 side (top) relative to plate-shaped end 102, can prevent from entering too far into surface (decorative cover) Sa.By this, can prevent from producing groove V on decorative cover Sa, even if or be formed with the degree of depth that groove V also can reduce groove V.

In addition, in embodiment 3, the ratio of top helicla flute 13a and lower part helical groove 13b is 50:50, therefore, it is possible to make the amount of metal of movement impartial.By this, can prevent the position of the center 13c of threaded 13 and the center Nc of docking section N from offseting further.In addition, be provided with top helicla flute 13a and lower part helical groove 13b owing to carving, therefore, the stirring efficiency of friction-stir can be improved.

< variation 1>

In variation 1, as shown in Figure 19 (a), on plate-shaped end 102A this aspect different from the thickness of plate-shaped end 102B, different from the embodiment described above.The thickness T1 of plate-shaped end 102B is thicker than the thickness T2 of plate-shaped end 102A.In variation 1, plate-shaped end 102A is docked to make the mode overlapping with the mid point in the short transverse of plate-shaped end 102B of the mid point in the short transverse of plate-shaped end 102A with plate-shaped end 102B.

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

When friction-stir, when making throw towards right rotation, the metal of plastic flow automation has from the left side (shearing side: the rotary speed of throw adds the translational speed side of throw) of instrument direct of travel towards the trend flowed in the right side (flow side: the rotary speed of throw deducts the translational speed side of throw) of instrument direct of travel, therefore, suppose to have gap between metallic plate, then the metal shearing side can by above-mentioned gap landfill.Thus, if it is little to shear the plate thickness of side, then there is metal not enough and make the trend of the central portion less thick in the plastification region after joint.In addition, when making throw towards anticlockwise, the right side of instrument direct of travel is for shearing side, and left side is flow side.

In variation 1, by making the thickness T1 being positioned at the plate-shaped end 102B shearing side thicker than the thickness T2 of plate-shaped end 102A, the metal just can eliminating the central portion of plastification region W is not enough, and makes joint better.

< variation 2>

In variation 2, as shown in Figure 19 (b), on plate-shaped end 102C this aspect different from the thickness of plate-shaped end 102D, different from the embodiment described above.The thickness T1 of plate-shaped end 102C is thicker than the thickness T2 of plate-shaped end 102D.In variation 2, plate-shaped end 102C is docked to make the mode overlapping with the mid point in the short transverse of plate-shaped end 102D of the mid point in the short transverse of plate-shaped end 102C with plate-shaped end 102D.

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

In variation 2, utilize the principle identical with variation 1, make the thickness T1 being positioned at the plate-shaped end 102C shearing side thicker than the thickness T2 of plate-shaped end 102D, the metal just can eliminating the central portion of plastification region W is not enough, and makes joint better.

[embodiment 4]

Below, embodiment of the present invention 4 is described.In embodiment 4, illustrate the situation that double face slab is engaged.Up, down, left, right, before and after is in description of the present embodiment according to the arrow of Figure 20.

As shown in figure 20, double face slab 201 is metal slim strip component, and it is formed primarily of outside plate 202, inner panel 203, support plate 204,204.Each support plate 204 is perpendicular to outside plate 202 and inner panel 203.By being engaged by multiple double face slab 201 in the lateral direction, be just used as the structure of such as rolling stock, aircraft, boats and ships, civil construction thing etc.The manufacture method of double face slab 201 has no particular limits, but in the present embodiment, double face slab 201 is that the mode be shaped by pressing is formed.As long as the metal of the material energy friction-stir of double face slab 201, not special restriction, but in the present embodiment, use aluminium alloy.

Outside plate 202 is by central portion 205, from the central portion 205 right side plate-shaped end 210 extended towards right side and form from the left side plate-shaped end 220 that central portion 205 is extended towards left side.

Right side plate-shaped end 210 is made up of the first outside plate heavy section 211, first hook portion 212 and the first covering part (Japanese: the first meat Sheng portion) 213.First outside plate heavy section 211 is perpendicular to support plate 204, and extended towards right side.First hook portion 212 is in hook-shaped, and it is made up of with from vertical the first extension 215 stretched out of the first thinner wall section 214 the first thinner wall section 214 extended towards right side.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 from the front end of the first thinner wall section 214 towards inner panel 203 side.Be formed with first to stretch out inclined plane 216 along with what just tilt the closer to the mode of support plate 204 towards inner panel 203 side at the sidepiece of the first extension 215.First covering part 213 gives prominence to certain thickness upward and the position be formed in heavy wall from the upper surface of the first outside plate heavy section 211, first thinner wall section 214 and the first extension 215.

Left side plate-shaped end 220 is formed primarily of the second outside plate heavy section 221, second hook portion 222 and the second covering part 223.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 formed by the second thinner wall section 224 extended towards left side with relative to the second extension 225 that the second thinner wall section 224 is vertically stretched out.The thickness of the second 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.Be formed at the left end of the second outside plate heavy section 221 with the second heavy section inclined plane 226 tilted along with the mode towards inner panel 203 side just away from support plate 204.The angle of inclination that second heavy section inclined plane 226 and first stretches out inclined plane 216 is identical.Second covering part 223 gives prominence to certain thickness upward and the position be formed in heavy wall from the upper surface of the second outside plate heavy section 221.

Inner panel 203 is by central portion 206, from the central portion 206 right side plate-shaped end 230 extended towards right side, form from the left side plate-shaped end 240 that central portion 206 is extended towards left side.

Right side plate-shaped end 230 is made up of the first inner panel heavy section 231, first covering part 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 given prominence to downward from the lower surface of the front of the first inner panel heavy section 231, and become the position of heavy wall.

Left side plate-shaped end 240 is made up of the second inner panel heavy section 241, second covering part 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 given prominence to downward from the lower surface of the front of the second inner panel heavy section 241, and become the position of heavy wall.

Then, the friction-stir device used in the present embodiment is described.As shown in Figure 21, Figure 22, friction-stir device 261 is made up of chuck portion 261a, the throw unit 262 be fixed on chuck portion 261a.In the same manner as embodiment 2, chuck portion 261a is engaged with the main body (not shown) of friction-stir device 261 by bolt.

Throw unit 262 is made up of keeper 263, sliding axle 264 and twin shaft shoulder stirring-head type instrument 265.

As shown in figure 22, keeper 263 is the components being built-in with sliding axle 264 and being arranged on the inside of chuck portion 261a.Keeper 263 cylindrically.The keyway 263b of elongated hole-shape through is in the radial direction formed at keeper 263.

As shown in figure 22, cylindrically, to sliding axle 264 it be inserted into the component in the hollow bulb of keeper 263.Sliding axle 264 can move in the vertical direction relative to keeper 263.The outer surface of sliding axle 264 is formed key 264a outstanding toward the outer side.By making key 264a engage with keyway 263b, by this, keeper 263 and sliding axle 264 just can be made to rotate integratedly.

As shown in figure 23, twin shaft shoulder stirring-head type instrument 265 is made up of the first shaft shoulder portion 253 of shaft shoulder portion 252, second and the threaded 254 be arranged between the first shaft shoulder portion 252 and the second shaft shoulder portion 253.First shaft shoulder portion 253 of shaft shoulder portion 252, second, threaded 254 all in roughly cylindric, and are coaxially arranged.Twin shaft shoulder stirring-head type instrument 265 is by making threaded 254 move bonding part the High Rotation Speed while, carrying out the instrument of friction-stir joint.

First shaft shoulder portion 252 comprises large-diameter portion 252a, tapering 252b and lower surface 252c.Tapering 252b undergauge gradually downward.Although not shown, the lower surface 252c but in the first shaft shoulder portion 252 is around being formed with the depressed part overlooked in swirl shape around threaded 254.

Second shaft shoulder portion 253 is formed as the structure at outer surface with groove.Second shaft shoulder portion 253 comprises large-diameter portion 253a, tapering 253b and upper surface 253c.Tapering 253b undergauge gradually upward.The diameter β 1 of large-diameter portion 253a is less than the diameter α 1 of large-diameter portion 252a.In addition, the diameter β 2 of upper surface 253c is identical with the diameter α 2 of lower surface 252c.

Carve at the outer surface of threaded 254 and be provided with the helicla flute 255 formed in the mode of left-hand thread.That is, helicla flute 255 is carved in the mode from the top down towards anticlockwise and is established.The external diameter U diameter group α 2 of threaded 254 and diameter β 2 is little.First shaft shoulder portion 252 is connected with sliding axle 264 by nut.

It is preferable that, the distance (length of the exposed portion of threaded 254) between the shaft shoulder portion of twin shaft shoulder stirring-head type instrument 265 is set as the thickness of slab (being the total of the thickness of the first outside plate heavy section 211 and the first covering part 213 in the present embodiment) of the part that will engage below.As long as the degree of depth of the groove of helicla flute 255 or spacing etc. are come suitably to set according to the distance etc. between the material that will carry out the metallic plate of friction-stir or the thickness of slab of the part that will engage, shaft shoulder portion.

In friction-stir device 261, because sliding axle 264 is formed as to move relative to keeper 263, therefore, friction-stir device 261 is configured to when the metal plate that will engage is as warpage upward, and twin shaft shoulder stirring-head type instrument 265 can move predetermined distance upward along with above-mentioned warpage.On the other hand, friction-stir device 261 be configured to the metallic plate that will engage downward warpage time, twin shaft shoulder stirring-head type instrument 265 can move predetermined distance downward along with above-mentioned warpage.By this, when friction-stir can be suppressed to engage, 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 described.At this, illustrate the situation carrying out after being arranged side by side by the double face slab 201 of two pieces of same shapes engaging.In above-mentioned joint method, carry out preparatory process and bonding process.

In preparatory process, as shown in figure 24, make double face slab 201,201 form the assembly of double face slab to fetching, and fix this assembly and make it not move.In explanation, the double face slab of a side is labeled as " 201A ", the double face slab of the opposing party is labeled as " 201B ", for self-corresponding key element each with above-mentioned double face slab, symbol " A " can be added, symbol " B " distinguishes.

In preparatory process, specifically, the first hook portion 212A of double face slab 201A is engaged with the second hook portion 222B of double face slab 201B, and the first end face 233A is docked with the second end face 243B.By this, the first hook portion 212A and the second hook portion 222B engage very close to each otherly, form holding section M.On the other hand, after the first end face 233A docks with the second end face 243B, form docking section N.The extended line at the position that the position engage extension 215A with extension 225B and the first end face 233A dock with the second end face 243B is called " center line C1 ".

After carrying out preparatory process, 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 flushes with the lower surface of the second outside plate heavy section 221B.In addition, the upper surface of the first inner panel heavy section 231A flushes with the lower surface of the second inner panel heavy section 241B, and meanwhile, the lower surface of the first covering part 232A flushes with the lower surface of the second covering part 242B.After the assembly forming double face slab, use fixture to fix this assembly and make it not move.

In bonding process, as shown in figure 25, the first bonding process that holding section M engages by twin shaft shoulder stirring-head type instrument 265 and the second bonding process engaged by docking section N is used.

In the first bonding process, double face slab 201A is made to be configured in the left side of direct of travel.Then, after being aimed at the center of the short transverse of the holding section M on the Center-to-Center line C1 of the threaded 254 of the twin shaft shoulder stirring-head type instrument 265 towards right rotation, holding section M is inserted.Then, friction-stir joint is carried out from front side towards rear side along holding section M.In addition, holding section M is formed with plastification region W1 (with reference to Figure 26) along the track of twin shaft shoulder stirring-head type instrument 265 movement.

In the second bonding process, as shown in figure 26, after the first bonding process terminates, the assembly of double face slab is turned over, and the assembly again fixing double face slab makes it not move.Then, after being aimed at the center of the short transverse of the docking section N on the Center-to-Center line C1 of the threaded 254 of the twin shaft shoulder stirring-head type instrument 265 towards right rotation, docking section N is inserted.Then, friction-stir joint is carried out from front side towards rear side along docking section N.Docking section N is formed with plastification region (not shown) along the track of twin shaft shoulder stirring-head type instrument 265 movement.By above operation, outside plate 202A engages with outside plate 202B, and inner panel 203A engages with inner panel 203B.

According to the friction stirring connecting method of present embodiment described above, engaged by the second hook portion 222B of the first hook portion 212A with outside plate 202B that make outside plate 202A, can prevent carrying out double face slab 201A when friction-stir engages simply and separate with double face slab 201B.On the other hand, at inner panel 203A and inner panel 203B, hook portion is not set, and the first end face 233A is docked with the second end face 243B, by this, the manufacture of preparatory process or double face slab can be made more laborsaving.When double face slab 201A, 201B are rectangular, if inner panel 203A and inner panel 203B also arranges hook portion, then the operation of engaging can be made to become difficulty, but according to the present embodiment, engaging operation can be made to become easy.

In addition, in preparatory process, when making the first hook portion 212A engage with the second hook portion 222B, first can be made to stretch out inclined plane 216A and the second main body inclined plane 226B and to engage while slip, therefore, making engaging operation become easy.Specifically, when putting down double face slab 201A from the top of placed double face slab 201B, as long as make first to stretch out inclined plane 216A and the second main body inclined plane 226B slides, first just can be made to stretch out inclined plane 216A and to engage with the second main body inclined plane 226B.

In addition, by arranging the first extension 215A and the second extension 225B, just can engage with simple structure.In addition, by arranging covering part (213A, 223B, 232A, 242B), when just can prevent friction-stir from engaging, metal is not enough.In the present embodiment, the helicla flute 255 of left-hand thread is provided with quarter at threaded 254, and make twin shaft shoulder stirring-head type instrument 265 while right rotation from front side backwards side move, therefore, metal after plastic flow automation is guided by helicla flute 255, and has the trend towards the second shaft shoulder portion 253 movement.Thus, by covering part (213A, 223B, 232A, 242B) is arranged in outside plate 202A, 202B and inner panel 203A, 203B, relative with the first shaft shoulder portion 252 side, the metal of the first side, shaft shoulder portion 252 just can be avoided not enough.

In addition, when formerly being engaged by docking section N, double face slab 201A, 201B likely can separate, but in the bonding process of present embodiment, owing to first holding section M being engaged, therefore, it is possible to prevent double face slab 201A, 201B when being engaged by docking section N from dividing out.

In addition, as long as the shape of double face slab 201A, 201B or both forms that can not separate of engaging form, not special restriction.It is preferable that, as in the present embodiment, the end of double face slab 201A, 201B is flushed, and engages very close to each otherly.In addition, also the component being provided with the first hook portion 212,212 can be formed at the two ends of the outside plate 202 of a double face slab, form the component being provided with the second hook portion 222,222 at the two ends of the outside plate 202 of another double face slab, and carry out engaging and engaging after above-mentioned double face slab is alternately arranged side by side.In addition, can also as shown in figure 27, the sidepiece of the first extension 215A and the second extension 225B be made to be the shape that inclination is not set.In addition, in the present embodiment, though support plate 204 is vertically formed with outside plate 202 and inner panel 203, also can be tilt.

< embodiment 1>

Using the friction-stir device 1 (twin shaft shoulder stirring-head type instrument 5) of embodiment 2, carrying out for what kind of bringing affect the test investigated to the thickness of metallic plate (plate-shaped end) and metallic plate gap each other that will carry out friction-stir joint on engagement state.As shown in figure 28, for the test body (materials A 6063-T5) of pair of metal plate will carrying out friction-stir joint, its thickness is made to change respectively to prepare test body H1 ~ H19." Ad side " refers to the side that the direction of rotation of twin shaft shoulder stirring-head type instrument is identical with direct of travel.That is, twin shaft shoulder stirring-head type instrument is towards the left side referring to direct of travel during right rotation." Re side " refers to the side that the direction of rotation of twin shaft shoulder stirring-head type instrument is contrary with direct of travel.That is, twin shaft shoulder stirring-head type instrument is towards the right side referring to direct of travel during right rotation.

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

Gap between metallic plate changes 0.25mm between 0 ~ 2.0mm at every turn.The shaft shoulder portion external diameter of the twin shaft shoulder stirring-head type instrument used in test (in shaft shoulder portion, the diameter in face that contacts with metallic plate) is set as 20mm, and threaded external diameter is set as 12mm, and the distance between shaft shoulder portion is set as 5.8mm.The speed setting of twin shaft shoulder stirring-head type instrument is 800rpm, and translational speed is set as 600/min, and direction of rotation is set as towards right rotation.In addition, described in embodiment 2, above-mentioned twin shaft shoulder stirring-head type instrument is the form that the height and position of twin shaft shoulder stirring-head type instrument can change along with the warpage of metallic plate.After carrying out friction-stir joint, judge bond quality from X-ray penetration test and cross section micro-assembly robot.

Figure 29 represents in embodiment 1, the figure of the relation between the gap of test body H1 and the thickness at junction surface.Figure 30 represents 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 is and the plastification region W identical meanings in embodiment.In addition, " the Ad portion ", " Cr portion ", " Re portion " at the junction surface of embodiment 1 represents each position in the Ad portion at the junction surface (plastification region W) shown in Figure 16 (b), central portion, Re portion.

As shown in figure 29, when the thickness of metallic plate is all set as 6.0mm to engage each other, if gap is less than 0.75mm, the minimizing of the thickness in Ad portion, Cr portion, Re portion is all very little, if but gap is more than 0.75mm, along with gap increases, the thickness in Ad portion, Cr portion, Re portion all reduces.Once gap is more than 1.2mm, then the thickness at junction surface produces joint defect less than 5.8mm.

As shown in figure 30, when the thickness of metallic plate is all set as 6.4mm to engage each other, if gap is all very little less than the minimizing of the thickness in 0.75mm, Ad portion, Cr portion, Re portion.If gap is at 0.75 ~ 1.75mm, although the thickness in Ad portion, Cr portion, Re portion all can reduce, do not produce joint defect.Once gap reaches 2.0mm, then the thickness at junction surface can reduce significantly and produce joint defect.

From Figure 29 and Figure 30, if the thickness in the Cr portion at junction surface is below 5.8mm, then joint defect can be produced.That is, even if metallic plate exists gap each other, as long as supply metal by Plastic Flow, the 5.8mm identical with the distance between shaft shoulder portion can not be less than with the thickness in the Cr portion making junction surface, just can intactly engage.As known from the above, need to set engaging condition, to make the thickness at junction surface (plastification region) be more than the distance between shaft shoulder portion.

Figure 31 represents in embodiment 1, affects the table of the relation between the plate thickness of bond quality and gap, it illustrates the situation of the thickness of the thickness=Re side of Ad side.In the drawings, "○" represents that the situation that connecting state is good, "×" represent the situation that connecting state is bad.

According to Figure 31, even if gap increases, as long as metallic plate also increases, then still have the good situation of connecting state.But difference between the distance between the thickness of metallic plate and shaft shoulder portion is more than 0.8mm (in the present embodiment, the Thickness Ratio 6.6mm of metallic plate is large) if can know, then in producing between shaft shoulder portion, pressure becomes large, and the life-span of instrument is significantly declined.

In addition, according to Figure 31, the distance between shaft shoulder portion is 5.8mm, and when the gap between metallic plate is 0 ~ below 0.75mm, as long as the thickness of metallic plate is 5.8 ~ 6.6mm, then connecting state is good.That is, as long as the distance Z between the thickness T of metallic plate and shaft shoulder portion is set to 0≤T-Z≤0.8mm, then connecting state is good.

When T-Z value is less than 0, that is, when distance Z when between shaft shoulder portion is larger than the thickness T of plate-shaped end 102, metal after plastic flow automation easily overflows from the first shaft shoulder portion 11 and the second shaft shoulder portion 12 (with reference to Figure 16 (a)), therefore, the density of junction surface (plastification region W) reduces.By this, the possibility that joint defect produces improves.When 0≤T-Z≤0.8mm, even if metallic plate gap is to each other 0 ~ 0.75mm, also the temperature of metallic plate can be made to increase because of the frictional heat of friction-stir joint, and because metallic plate expands, gap be disappeared, therefore, can think that connecting state is roughly good.

In addition, according to Figure 31, the distance between shaft shoulder portion is 5.8mm, and when metallic plate gap is each other 0 ~ below 1.0mm, as long as the thickness of metallic plate is 6.0 ~ 6.6mm, then connecting state is good.That is, as long as can know, the distance Z between the thickness T of metallic plate and shaft shoulder portion is set to 0.2≤T-Z≤0.8mm, then connecting state is good.If T-Z value is less than 0.2mm, then the metal after plastic flow automation easily overflows from the first shaft shoulder portion 11 and the second shaft shoulder portion 12, and therefore, the density at junction surface reduces.By this, the possibility that joint defect produces improves.

In addition, according to Figure 31, the distance between shaft shoulder portion is 5.8mm, the gap between metallic plate for be greater than 1.0mm and for below 1.75mm time, as long as the thickness of metallic plate is 6.2 ~ 6.6mm, then connecting state is good.That is, as long as can know, the 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 automation easily overflows from the first shaft shoulder portion 11 and the second shaft shoulder portion 12, and therefore, the density at junction surface reduces.By this, the possibility that joint defect produces improves.

According to Figure 31, the distance between shaft shoulder portion is 5.8mm, metallic plate gap each other for be greater than 1.75mm and for below 2.00mm time, as long as the thickness of metallic plate is 6.6mm, then connecting state is good.That is, as long as can know, the thickness T of metallic plate and the spacing Z in shaft shoulder portion is set to T-Z=0.8mm, then connecting state is good.If T-Z value is less than 0.8mm, then because the metal after plastic flow automation easily overflows from the first shaft shoulder portion 11 and the second shaft shoulder portion 12, therefore, the density at junction surface is reduced.By this, the possibility that joint defect produces improves.

Figure 32 is the table of the relation represented between the thickness of the metallic plate affecting bond quality and gap, it illustrates the varied in thickness that makes Ad side and by situation fixing for the thickness of Re side.Figure 33 is the table of the relation represented between the thickness of the metallic plate affecting bond quality and gap, it illustrates and is fixed by the thickness of Ad side and make the situation of the varied in thickness of Rd side.

In the test of Figure 32, the thickness of Re side is fixed as 6.0mm, and the thickness of Ad side is suitably changed, carry out friction-stir joint.In the test of Figure 33, the thickness of Ad side is fixed as 6.0mm, and the thickness of Re side is suitably changed, carry out friction-stir joint.That is, in the test of Figure 32 and Figure 33, make the varied in thickness of the left and right of the metallic plate that will dock, while observe the bond quality under different gap.

After being contrasted by Figure 32 and Figure 33, the good situation in Figure 32 is more.In other words, as shown in figure 32, the metallic plate of Re side is being fixed as 6.0mm, and is making the metallic plate of Ad side when more than 6.2mm changes, the situation that connecting state is good is more.This is owing to making twin shaft shoulder stirring-head type instrument towards right rotation in embodiment 1, therefore, metal after plastification flowing is easily mobile from the left side (Ad side) of direct of travel towards right side (Re side), when metallic plate exists gap to each other, the metal of Ad side can this gap of landfill.Therefore, if as the condition of Figure 33, make the plate thickness on the right side of the Thickness Ratio direct of travel of the metallic plate on the left of direct of travel little, then the metal of junction surface central authorities is not enough, and the possibility making joint bad is higher.But if as the condition of Figure 32, make the plate thickness on the left of direct of travel larger than the plate thickness on the right side of direct of travel, then the metal that can supplement junction surface central authorities is not enough, therefore, can obtain good engagement state.

Above-mentioned result also can be confirmed from Figure 34 and Figure 35.Plot point " ◆ " represents test body H4 (thickness=6.6mm of Ad side and the thickness=6.6mm of Re side).Plot point " ■ " represents test body H10 (thickness=6.0mm of Ad side and the thickness=6.6mm of Re side), and plot point "●" represents test body H16 (thickness=6.6mm of Ad side and the thickness=6.0mm of Re side).

As shown in Figure 34 (a), can know in the thickness in the Cr portion at junction surface, diminish according to the order of test body H4, H16, H10.That is, if can know, 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 34 (b), can know that test body H4, H10, H16 are about 5.8mm in the thickness in the Ad portion at junction surface, and reduce to some extent than the thickness before engaging.Particularly, when viewing test body H4, H16, can know that thickness has the minimizing of certain degree.

As shown in Figure 35 (a), can know that, in the thickness in the Re portion at junction surface, the thickness of test body H10, H16 does not have very large difference, but the thickness of test body H4 is larger generally.In addition, if by Figure 34 (b) and Figure 35 (a) overall contrast, then the thickness in known Re portion is larger than the thickness in Ad portion generally.

As shown in Figure 35 (b), can know that the average thickness at junction surface increases by the order of test body H10, H16, H4.

As shown in Figure 34, Figure 35, service test body H4, H16, compared with test body 10, can increase the thickness in Cr portion.But, if service test body H4, although the thickness at junction surface can be increased, the interior pressure between shaft shoulder portion correspondingly can be made to become large and life tools are reduced possibility raising.Therefore, by as test body H16, the thickness of the metallic plate of Ad side is set as larger than the thickness of the metallic plate of Re side, the internal drop between shaft shoulder portion can not only be made low, and the thickness in Cr portion at junction surface can be increased.

< embodiment 2>

Using the friction-stir device 1 (twin shaft shoulder stirring-head type instrument 5) of embodiment 2, carrying out for what kind of bringing affect the test investigated to the thickness of metallic plate (plate-shaped end) and metallic plate gap each other that will carry out friction-stir joint on engagement state.Metallic plate gap each other changes 0.25mm between 0 ~ 2.0mm at every turn.The shaft shoulder portion external diameter of the twin shaft shoulder stirring-head type instrument used in test (in shaft shoulder portion, the diameter in face that contacts with metallic plate) is set as 10mm, and threaded external diameter is set as 6mm, and the distance between shaft shoulder portion is set as 2.8mm.The speed setting of twin shaft shoulder stirring-head type instrument is 2000rpm, and translational speed is set as 1000mm/min, and direction of rotation is set as towards right rotation.In addition, described in embodiment 2, above-mentioned twin shaft shoulder stirring-head type instrument is the form that the height and position of twin shaft shoulder stirring-head type instrument can change along with the warpage of metallic plate.After carrying out friction-stir joint, judge bond quality from X-ray penetration test and cross section micro-assembly robot.

For the test body (materials A 6063-T5) will carrying out the metallic plate of friction-stir joint, use Ad side identical with the plate thickness of Rd side, but the test body that thickness changes between 3.0mm, 3.2mm, 3.4mm.

Figure 36 represents in example 2, affects the figure of the relation between the thickness of the metallic plate of bond quality and gap, it illustrates the situation of Ad side=Re side.In the drawings, "○" represents that the situation that connecting state is good, "×" represent the situation that connecting state is bad.

According to Figure 36, even if gap increases, as long as the thickness of metallic plate also increases relative to the distance Z between shaft shoulder portion, then still have the good situation of connecting state.But difference between the distance between the thickness of metallic plate and shaft shoulder portion is more than 0.6mm (in the present embodiment, the Thickness Ratio 3.4mm of metallic plate is large) if can know, then in producing between shaft shoulder portion, pressure becomes large, and the life-span of instrument is significantly declined.

In addition, according to Figure 36, the distance Z between shaft shoulder portion is 2.8mm, and when the gap between metallic plate is below 0.75mm, as long as the thickness of metallic plate is 3.0 ~ 3.4mm, then connecting state is good.That is, as long as can know, the thickness T of metallic plate and the spacing Z in shaft shoulder portion is 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 automation easily overflows from the first shaft shoulder portion 11 and the second shaft shoulder portion 12, and the density at junction surface is reduced.By this, the possibility that joint defect produces improves.If the gap between metallic plate is below 0.75mm, then makes the temperature of metallic plate increase because of the frictional heat of friction-stir joint, because metallic plate expands, gap is disappeared, therefore, can think that connecting state is roughly good.

In addition, according to Figure 36, the distance between shaft shoulder portion is 2.8mm, metallic plate gap each other for be greater than 0.75mm and for below 1.50mm time, as long as the thickness of metallic plate is 3.2 ~ 3.4mm, then connecting state is good.That is, as long as can know, the thickness T of metallic plate and the spacing Z in shaft shoulder portion is set to 0.4≤T-Z≤0.6mm, then connecting state is good.If T-Z value is less than 0.4mm, then the metal after plastic flow automation easily overflows from the first shaft shoulder portion 11 and the second shaft shoulder portion 12, and the density at junction surface is reduced.By this, the possibility that joint defect produces improves.

In addition, according to Figure 36, the distance between shaft shoulder portion is 2.8mm, metallic plate gap each other for be greater than 1.50mm and for below 1.75mm time, as long as the thickness of metallic plate is 3.4mm, then connecting state is good.That is, as long as the thickness T of metallic plate and the spacing Z in shaft shoulder portion is set to T-Z=0.6mm, then connecting state is good.

In addition, according to Figure 36, if gap is 2.0mm, though then the thickness of metallic plate be 3.4mm also can produce engage bad.

< tool shape >

Figure 37 represents in embodiment 1, each size of twin shaft shoulder stirring-head type instrument and the table of connecting state when the distance between shaft shoulder portion being fixed as 5.8mm.Figure 38 represents in example 2, each size of twin shaft shoulder stirring-head type instrument and the table of connecting state when the distance between shaft shoulder portion being fixed as 2.8mm.Figure 39 represents in reference example, each size of twin shaft shoulder stirring-head type instrument and the table of connecting state when the distance between shaft shoulder portion being fixed as 11.5mm.At Figure 37, Figure 38, Tu39Zhong, show tensile resistence/material resistance, fracture resistence force/material resistance, material maintenance trend.

Tensile resistence/material resistance is by Y ²/ (X ²-Y ²) represent.That is, the lower surface in the first shaft shoulder portion 11 and the upper surface in the second shaft shoulder portion 12 are when friction-stir because being subject to the pressing of the metal after plastic flow automation, and therefore, tensile stress acts on threaded 13.Therefore, the value (X that tensile resistence/material resistance obtains after using and the square value of the external diameter X of the lower surface (upper surface in the second shaft shoulder portion 12) in the first shaft shoulder portion 11 (in shaft shoulder portion, the diameter in face that contacts with metallic plate) being deducted the square value of the external diameter Y of threaded 13 ²-Y ²), and the square value of the external diameter Y of threaded 13 is represented divided by the value after value obtained above.

Fracture resistence force/material resistance is by Y ²/ YZ represents.That is, when twin shaft shoulder stirring-head type instrument 5 makes docking section N move, effect has the power in the direction vertical with the axis of threaded 13.Therefore, fracture resistence force/material resistance use by the square value of the external diameter of threaded 13 divided by threaded 13 comprise the sectional area YZ in the cross section of axle after value represent.

Material keeps trend by X ²/ Y ²represent.That is, when friction-stir, the metal after plastic flow automation is kept by the upper surface in the lower surface in the first shaft shoulder portion 11 and the second shaft shoulder portion 12.Therefore, material keeps trend use to be represented divided by the value after the square value of the external diameter Y of threaded 13 by the square value of the external diameter X (diameter in the face contacted in shaft shoulder portion, with metallic plate) in the first shaft shoulder portion 11 (the second shaft shoulder portion 12).

After analyzing Figure 37, Figure 38, Figure 39, if known material keeps trend (X ²/ Y ²) be less than 2.0, then joint defect easily produces, if larger than 2.0, then joint defect can not produce.If material keeps trend (X ²/ Y ²) be less than 2.0, then due to threaded 13 external diameter Y relative to the first shaft shoulder portion 11 (the second shaft shoulder portion 12) external diameter excessively thick, therefore, can think and the area in the shaft shoulder portion that metal presses diminished, thus, cannot press by the metal after friction-stir fully, metal just can produce burr, and overflows from the outside in shaft shoulder portion.On the other hand, if material keeps trend (X ²/ Y ²) larger than 2.0, then for the external diameter Y of threaded 13, the external diameter X in the first shaft shoulder portion 11 (the second shaft shoulder portion 12) is large, therefore, it is possible to use two shaft shoulder portions to press the metal after plastification flowing fully.By this, can think that joint defect is not easy to produce.

In addition, after analyzing Figure 37, Figure 38, Figure 39, if known tensile resistence/material resistance (Y ²/ (X ²-Y ²)) be less than 0.2, then threaded is easily damaged.This is due to tensile resistence/material resistance (Y ²/ (X ²-Y ²)) when being less than 0.2, threaded external diameter Y diminishes relative to shaft shoulder portion external diameter X, therefore, can think that the tensile resistence of when engaging threaded is relative to deficiency the material resistance produced in the axial direction, and threaded 13 is easily fractureed.If tension stress/material resistance (Y ²/ (X ²-Y ²)) larger than 0.2, then can think that threaded external diameter Y relative shaft shoulder portion external diameter X becomes large, therefore, threaded 13 is not easy to fracture.

In addition, after analyzing Figure 37, Figure 38, Figure 39, if known fracture resistence force/material resistance (Y ²/ YZ) be less than 1.2, then threaded 13 is easily damaged.This is due at fracture resistence force/material resistance (Y ²/ YZ) when being less than 1.2, the external diameter Y of threaded is relative to less distance (length of the threaded) Z between the shaft shoulder, therefore, can think that threaded is not enough for the fracture resistence force of the material flowed along the direction contrary with instrument direct of travel when engaging, and threaded 13 is easily fractureed.If fracture resistence force/material resistance (Y ²/ YZ) be greater than 1.2, then threaded external diameter Y is relative to comparatively large distance (length of the threaded) Z between shaft shoulder portion, and therefore, threaded 13 is not easy to fracture.

In addition, after Figure 37, Figure 38, Figure 39 are analyzed, known as tension stress/material resistance (Y ²/ (X ²-Y ²)) be less than 0.2, or fracture resistence force/material resistance (Y ²/ YZ) when being less than 1.2, can there is breakage in threaded.But, as tension stress/material resistance (Y ²/ (X ²-Y ²)) be greater than 0.2 and fracture resistence force/material resistance (Y ²/ YZ) when being greater than 1.2, threaded can not be damaged.Therefore, can obtain as drawn a conclusion: in order to when preventing from engaging, the threaded of twin shaft shoulder stirring-head type instrument occurs damaged, it is preferable that, become to make by the profile design of threaded distance (length of the threaded) Z between shaft shoulder portion external diameter X, threaded external diameter Y and shaft shoulder portion to meet with following formula (1), (2) simultaneously.

Y ²/(X ²－Y ²)＞0.2…………(1)

Y ²/YZ＞1.2…………………(2)

< embodiment 3>

In embodiment 3, the threaded on twin shaft shoulder stirring-head type instrument are carved the spiral fluted ratio of establishing and spiral fluted direction of rotation in what kind of impact brings investigate on the metallic plate after engaging.With reference to Figure 16 (a), the direction of rotation of twin shaft shoulder stirring-head type instrument is set to from sliding axle side and is viewed as towards right rotation.In addition, the ratio of the top helicla flute 13a of right-hand thread and the lower part helical groove 13b of left-hand thread is changed, sets five kinds of condition A ~ E, and carry out friction-stir joint.

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

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

In embodiment 3, prepare the metallic plate (A6063-T5) that the thick T of two boards is the aluminium alloy of 6.2mm, and two pieces of metallic plates are engaged.The external diameter X in the first shaft shoulder portion 11 of twin shaft shoulder stirring-head type instrument 5 and the second shaft shoulder portion 12 (in shaft shoulder portion, the diameter in face that contacts with metallic plate) is set as 20mm, the external diameter Y of threaded 13 is set as 12mm, and the distance Z between shaft shoulder portion is set as 5.8mm.Helicla flute depth-set is 0.81mm.The speed setting of twin shaft shoulder stirring-head type instrument 5 is 800rpm, and engaging speed is set as 600mm/min.In addition, in each condition, in order to investigate the relation between the N of docking section, be, after 0mm, 1.25mm, 1.50mm, 1.75mm, 2.00mm, test space change.

Figure 40 represents in embodiment 3, the figure of the impact (gap of docking section is 0mm) that the difference of height of screw thread ratio on metallic plate brings.Figure 41 represents in embodiment 3, the figure of the impact (gap of docking section is 1.5mm) that screw thread ratio is brought metallic plate difference of height.Difference of height is the surface of metallic plate before engaging is benchmark (benchmark=0), represents the height and position at each position after joint.Difference of height on the occasion of time represent convexly, for representing during negative value concavely (groove).

As shown in figure 40, the Re side of surperficial Sa using " ▲ " to represent all be expressed as in condition A ~ E on the occasion of.That is, the Re side of surperficial Sa all the time convexly.

On the other hand, the Ad side of the surperficial Sa using " ◆ " to represent is expressed as very large negative value in condition A.That is, in condition A, the Ad side of surperficial Sa is in very large concavity.In addition, in the Ad side of the surperficial Sa using " ◆ " to represent, along with the increase of right-hand thread ratio, the depression of the Ad side of surperficial 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 very large on the occasion of.That is, in condition A, the Ad side of back side Sb is in very large convex.In addition, 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 increases gradually, in condition D, E concavely.That is, the Ad side of the back side Sb that the Ad side of the surperficial Sa using " ◆ " to represent and use " ■ " represent, being in the ratio of right-hand thread is contrary relation.In addition, the Ad side of the surperficial Sa using " ◆ " to represent and use " ■ ", even the Ad side of the back side Sb represented is under condition C (50:50), are also slightly concavely.

After being contrasted by Figure 40 and Figure 41, even if the gap of known docking section is 1.5mm, when the gap of docking section is 0mm, the trend of difference of height does not also almost change.The Re side of the surperficial Sa that the use " ▲ " of Figure 41 represents and little compared with Figure 40 on the whole with the value of the Re side of the back side Sb using "●" to represent can be known.

Figure 42 represents in embodiment 3, when the gap of docking section is different, and the figure in the plastification region of the metallic plate of condition A.Figure 43 represents in embodiment 3, when the gap of docking section is different, and the figure in the plastification region of the metallic plate of condition B.Figure 44 represents in embodiment 3, when the gap of docking section is different, and the figure in the plastification region of the metallic plate of condition C.Figure 45 represents in embodiment 3, when the gap of docking section is different, and the figure in the plastification region of the metallic plate of condition D.Figure 46 represents in embodiment 3, when the gap of docking section is different, and the figure in the plastification region of the metallic plate of condition E.The left hurdle of each figure in Figure 42 ~ Figure 46 represents the sectional view that the micro-assembly robot having carried out plastification region W is observed, intermediate hurdles represent the top view of surface (decorative cover) the Sa side of plastification region W, and right hurdle represents the top view of the Sb side, the back side of plastification region W.

As shown in the left hurdle of Figure 42, when condition A, be formed with very large groove V in (decorative cover) Sa side, surface, but Sb side does not form groove V overleaf.When the gap of docking section is 1.75mm, 2.00mm, surperficial Sa side forms joint defect Q.Plastification region W expands gradually towards back side Sb.The lines of plastification region W is that left and right is asymmetrical.The lines of the Ad side of plastification region W is darker than the lines of Re side.In addition, in Figure 42, the burr P of the burr P specific surface Sa side of the Sb side, the back side of metallic plate is few.

As shown in the left hurdle of Figure 43, when condition B, be formed with the groove V less than condition A in (decorative cover) Sa side, surface, but Sb side do not have groove V overleaf.When the gap of docking section is 2.00mm, form joint defect Q in the inside of metallic plate.The lines of plastification region W is that left and right is asymmetrical.The lines of the Ad side of plastification region W is darker than the lines of Re side.After the back side Sb of the condition A of back side Sb and the Figure 42 of the condition B by Figure 43 contrasts, the burr P of condition B produces more, and makes rough surface.

As shown in the left hurdle of Figure 44, when condition C, be formed with less groove V in (decorative cover) Sa side, surface, Sb side is also formed with less groove V overleaf.When the gap of docking section is 2.00mm, form joint defect Q in the inside of metallic plate.The upper and lower lines of plastification region W is roughly symmetrical, and the lines of left and right is roughly symmetrical.After the surperficial Sa of the condition B of surperficial Sa and Figure 43 of the condition C by Figure 44 contrasts, the surperficial Sa of condition C almost do not have burr.In addition, on the back side Sb of condition C, the burr P of Re side produces many than the burr P of Ad side.

As shown in the left hurdle of Figure 45, when condition D, do not form groove V in (decorative cover) Sa side, surface, and Sb side forms less groove V overleaf.When the gap of docking section is 2.00mm, form joint defect Q in the inside of metallic plate.In addition, the burr P of the burr P specific surface Sa of back side Sb produces many.

As shown in the left hurdle of Figure 46, when condition E, do not form groove V in (decorative cover) Sa side, surface, and Sb side forms very large groove V overleaf.When the gap of docking section is 1.75mm, 2.00mm, form joint defect Q in the inside of metallic plate.Plastification region W narrows gradually towards back side Sb.Sb produces many burr P overleaf, does not then produce burr P at surperficial Sa.

Figure 47 is the table after the result of embodiment 3 being gathered.The symbol of each key element is directly with reference to the symbol of embodiment 2.As shown in the schematic diagram of the condition A of Figure 47, if arrange the left-hand thread towards right rotation in the scope of 100%, then the metal of liquidation can be guided by helicla flute, and moves towards Sb side, the back side.Because of the movement of above-mentioned metal, the second shaft shoulder portion 12 of twin shaft shoulder stirring-head type instrument 5 is pressed, twin shaft shoulder stirring-head type instrument 5 is mobile towards the side (back side Sb side) contrary with sliding axle 4 relative to metallic plate.By this, because twin shaft shoulder stirring-head type instrument 5 can enter too far into surface (decorative cover) Sa side, therefore, very large groove V is formed in surperficial Sa side.

On the other hand, as shown in the condition B ~ E of Figure 47, when the right-hand thread part arranging more than 25% ratio is used as top helicla flute 13a, the metal that the helicla flute of reason right-hand thread causes moves, twin shaft shoulder stirring-head type instrument 5 will be made to be pressed by towards sliding axle 4 side (top), thus can prevent twin shaft shoulder stirring-head type instrument from entering too far into the surperficial Sa (decorative cover) of metallic plate.By this, can prevent from producing groove V at surperficial Sa (decorative cover), even if or be formed with the degree of depth that groove also can reduce groove.Therefore, it is possible to reduce for make the metal sheet surface Sa after joint level and smooth fine finishining process consuming time.But, when in condition B, condition C, the gap of docking section is 2.00mm, and when in condition D, condition E, the gap of docking section is 1.75mm or 2.00mm, owing to creating joint defect Q, be therefore not suitable for.If the cause that the gap of docking section will cause greatly the metal material of bonding part to reduce can be thised is presumably because.

In addition, such as condition E, when the ratio with 100% carves the right-hand thread established towards right rotation, twin shaft shoulder stirring-head type instrument 5 moves 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 the top of the surface of plate-shaped end 102 before friction-stir (decorative cover) Sa, gap between the height and position and the surperficial Sa of plate-shaped end 102 before friction-stir of the lower surface in the first shaft shoulder portion 11 is larger, the pressing of metal is just abundant not, but the gap between the height and position and the surperficial Sa of plate-shaped end 102 before friction-stir of the lower surface in the first shaft shoulder portion 11 is small, metal can be pressed fully.

In addition, the gap between the height and position and the surperficial Sa of plate-shaped end 102 before friction-stir of the lower surface in the first shaft shoulder portion 11 is small, plastification region W only gives prominence to a little than the surperficial Sa before friction-stir.But the surperficial Sa of plate-shaped end 102 is become level and smooth process owing to only needing align with the height of the surperficial Sa before friction-stir and outstanding part cut, therefore, fine finishining process becomes easy.

In above-mentioned embodiment 2, top helicla flute 13a and lower part helical groove 13b is formed with the ratio of 50:50 relative to the distance Z between shaft shoulder portion, but decorative cover is being set to surperficial Sa, and when making twin shaft shoulder stirring-head type instrument 5 towards right rotation, it is preferable that, the lower part helical groove 13b of the left-hand thread of the top helicla flute 13a of the right-hand thread of the first side, shaft shoulder portion 11 and the second side, shaft shoulder portion 12 is formed with the ratio of 25:75 ~ 100:0 relative to the distance Z between shaft shoulder portion.That is, also the top helicla flute 13a of right-hand thread can be formed as in the first side, shaft shoulder portion 11 Z-shaped relative to the distance between shaft shoulder portion become more than 25% part, and using the part beyond the helicla flute 13a of top all as the lower part helical groove 13b of left-hand thread.When making twin shaft shoulder stirring-head type instrument 5 towards right rotation, also can not left-hand thread being set, and right-hand thread is set in the total length of the axis of threaded 13.

In addition, in embodiment 3, though surperficial Sa side is set as decorative cover, also Sb side, the back side can be set as decorative cover.In this case, with reference to Figure 47, by the direction of rotation of twin shaft shoulder stirring-head type instrument 5, spiral fluted coiling direction are set according to condition A, B, C, D, by this, can prevent back side Sb (decorative cover) side from producing groove V, even if or be formed with the degree of depth that groove V also can reduce groove V.

That is, when making twin shaft shoulder stirring-head type instrument 5 towards when rear side Sb being set as decorative cover while right rotation, it is preferable that, comprise: docking operation, in this docking operation, makes the end face of metallic plate dock each other, and bonding process, in this bonding process, making, the second shaft shoulder portion 12 is relative with the decorative cover of metallic plate, and after the axial centre of threaded 13 is aimed at the center, thickness of slab direction of metallic plate, the threaded 13 of the twin shaft shoulder stirring-head type instrument 5 towards right rotation is made to move to docking section N, carry out friction-stir joint, below thickness of slab distance Z between shaft shoulder portion being set as metallic plate, and the helicla flute of left-hand thread is formed in the second side, shaft shoulder portion 12 of the outer peripheral face of threaded 13, and make the helicla flute of above-mentioned left-hand thread relative to the distance Z between shaft shoulder portion with more than 25% ratio formed.

According to above-mentioned joint method, the left-hand thread in the second side, shaft shoulder portion 12 is formed with the ratio of more than 25%, therefore, the metal that the helicla flute of reason left-hand thread causes moves, just twin shaft shoulder stirring-head type instrument 5 can be made to press towards with sliding axle 4 opposite side (below), thus can prevent twin shaft shoulder stirring-head type instrument 5 from entering too far into the back side (decorative cover) Sb of metallic plate.By this, can prevent from producing groove, even if or be formed with the degree of depth that groove also can reduce groove at decorative cover.

Figure 48 is the figure after twin shaft shoulder stirring-head type instrument is gathered towards situation during anticlockwise.

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

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

As shown in Embodiment 3, when towards anticlockwise, be used in top helicla flute 13a and be provided with left-hand thread, be provided with the twin shaft shoulder stirring-head type instrument 5A of right-hand thread at lower part helical groove 13b.When making twin shaft shoulder stirring-head type instrument 5A towards anticlockwise, because the coiling direction of the screw thread of the twin shaft shoulder stirring-head type instrument 5 from embodiment 2 is different, therefore, result can show the action effect identical with embodiment 3.That is, as shown in condition G ~ condition J, after metal because of friction-stir after liquidation can be guided by the top helicla flute 13a of the left-hand thread of threaded 13, move towards the first side, shaft shoulder portion 11, and after being guided by the top helicla flute 13b of the right-hand thread of threaded 13, move towards the second side, shaft shoulder portion 12.Due to left-hand thread with more than 25% ratio formed, therefore, the metal that the helicla flute of reason left-hand thread causes moves, twin shaft shoulder stirring-head type instrument 5A is pressed by towards sliding axle 4 side (top), thus can prevent twin shaft shoulder stirring-head type instrument 5A from entering too far into surface (decorative cover) Sa of metallic plate.By this, can prevent from producing groove V, even if or be formed with the degree of depth that groove V also can reduce groove V at surface (decorative cover) Sa.By this, can reduce for making the surperficial Sa of the metallic plate after joint become the consuming time of level and smooth fine finishining process.

In addition, such as condition J, when the ratio with 100% carves the left-hand thread established towards anticlockwise, twin shaft shoulder stirring-head type instrument 5 moves 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 surperficial Sa of plate-shaped end 102 before friction-stir, gap between the height and position and the surperficial Sa of plate-shaped end 102 before friction-stir of the lower surface in the first shaft shoulder portion 11 is larger, the pressing of metal just can be abundant not, but the gap between the height and position and the surperficial Sa of plate-shaped end 102 before friction-stir of the lower surface in the first shaft shoulder portion 11 is small, just can press metal fully.

Gap between the height and position and the surperficial Sa of plate-shaped end 102 before friction-stir of the lower surface in the first shaft shoulder portion 11 is small, plastification region W only gives prominence to a little than the surperficial Sa before friction-stir.But the surperficial Sa of plate-shaped end 102 is become level and smooth process owing to only needing align with the height of the surperficial Sa before friction-stir and outstanding part cut, therefore, fine finishining process becomes easy.

In above-mentioned embodiment 3, top helicla flute 13a and lower part helical groove 13b is formed with the ratio of 50:50 relative to the distance Z between shaft shoulder portion, but decorative cover is being set to surperficial Sa, and when making twin shaft shoulder stirring-head type instrument 5 towards anticlockwise, it is preferable that, the lower part helical groove 13b of the top helicla flute 13a of the left-hand thread of the first side, shaft shoulder portion 11 and the right-hand thread of the second side, shaft shoulder portion 12 is formed with the ratio of 25:75 ~ 100:0 relative to the distance Z between shaft shoulder portion.That is, also left-hand thread top helicla flute 13a can be formed as in the first side, shaft shoulder portion 11, Z-shaped relative to the distance between shaft shoulder portion become more than 25% part, and make part beyond the helicla flute 13a of top all as the lower part helical groove 13b of right-hand thread.When making twin shaft shoulder stirring-head type instrument 5 towards anticlockwise, also can not right-hand thread being set, left-hand thread is set in the whole total length of the axis of threaded 13.

In addition, although surperficial Sa side is set as decorative cover, also S side, the back side can be set as decorative cover.In this case, with reference to Figure 48, 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, by this, can prevent Sb (decorative cover) side overleaf from producing groove V, even if or be formed with the degree of depth that groove V also can reduce groove V.

That is, when making twin shaft shoulder stirring-head type instrument 5 towards anticlockwise and Sb side, the back side being set as decorative cover, it is preferable that, comprising: docking operation, in this docking operation, makes the end face of metallic plate dock each other, and bonding process, in this bonding process, making, the second shaft shoulder portion 12 is relative with the decorative cover of metallic plate, and after the axial centre of threaded 13 is aimed at the center, thickness of slab direction of metallic plate, the threaded 13 of the twin shaft shoulder stirring-head type instrument 5A towards anticlockwise is made to move to docking section N, carry out friction-stir joint, below thickness of slab distance Z between shaft shoulder portion being set as metallic plate, and the helicla flute of right-hand thread is formed in the second side, shaft shoulder portion 12 of the outer peripheral face of threaded 13, and make the helicla flute of above-mentioned right-hand thread relative to the distance Z between shaft shoulder portion with more than 25% ratio formed.

According to above joint method, the right-hand thread in the second side, shaft shoulder portion 12 is formed with the ratio of more than 25%, therefore, the metal that the helicla flute of reason right-hand thread causes moves, twin shaft shoulder stirring-head type instrument 5A is pressed with the opposition side (below) of sliding axle 4 by court, thus can prevent twin shaft shoulder stirring-head type instrument 5A from entering too far into the back side (decorative cover) Sb of metallic plate.By this, (decorative cover) can be prevented overleaf to produce groove, even if or form the degree of depth that groove also can reduce groove.

< embodiment 4>

Then, embodiments of the invention 4 are described.Figure 49 represents the engaging form of embodiment 4 or the front view of docking form, and wherein, Figure 49 (a) represents type i, and Figure 49 (b) represents Type II, and Figure 49 (c) represents type-iii.In example 4, prepare three kinds of bodies to be tested, only respectively friction-stir joint is carried out to the part of type i, Type II and type-iii, and respective angular deformation after joint is investigated.

Type i ~ III is the double face slab 201A be made up of aluminium alloy 6N01-T5 material, 201B, with reference to Figure 20 and Figure 49, be set to and make outside plate heavy section (the first outside plate heavy section 211, second outside plate heavy section 221) thickness of slab a=3mm, covering part (covering part 213, 223, 232, 242) thickness b=0.5mm, from the length c of support plate 204 to the first the end face 33 and length c=15mm from support plate 204 to the second end face 43, length d=30mm from the upper surface of outside plate 202 to the lower surface of inner panel 203, left and right width dimensions e=200mm, extend and be of a size of 5000mm.

With reference to Figure 23, twin shaft shoulder stirring-head type instrument 265 is set to diameter β 2=10mm, the diameter β 1=15mm in the second shaft shoulder portion 253, the external diameter U=6mm of threaded 254 of the diameter α 2=10mm of the lower surface 252c making the first shaft shoulder portion 252, the upper surface 253c in the second shaft shoulder portion 253.2.9mm is set as from the length (length of the exposed portion of threaded 254) in the first shaft shoulder portion of shaft shoulder portion 252 to the second 253.The shape being formed at the depressed part (not shown) of the lower surface 252c in the first shaft shoulder portion 252 is vortex shape from top view, and the depth-set of depressed part is 0.3mm, and the spacing setting of depressed part is 1.2mm.Twin shaft shoulder stirring-head type instrument 265 is set to towards right rotation, and type i ~ III all moves towards rear side outside the paper of Figure 49 (a) ~ Figure 49 (c).The speed setting of twin shaft shoulder stirring-head type instrument 265 is 2000rpm, and translational speed is set as 1000mm/min.

In type i, as shown in Figure 49 (a), at the left side of the direct of travel of twin shaft shoulder stirring-head type instrument 265 configuration double face slab 201A, at right side configuration double face slab 201B, and the first hook portion 212A is engaged with the second hook portion 222B.

In Type II, as shown in Figure 49 (b), at the right side of the direct of travel of twin shaft shoulder stirring-head type instrument 265 configuration double face slab 201A, at left side configuration double face slab 201B, and the first hook portion 212A is engaged with the second hook portion 222B.

In type-iii, as shown in Figure 49 (c), at the left side of the direct of travel of twin shaft shoulder stirring-head type instrument 265 configuration double face slab 201A, at right side configuration double face slab 201B, and the first end face 233A is docked with the second end face 243B.

Figure 50 is the figure of the angular deformation result representing type i.Figure 51 is the figure of the angular deformation result representing Type II.Figure 52 is the figure of the angular deformation result representing type-iii.Transverse axis represents the length in the direction of the width of engaged body distance left-hand end each to be tested.Width=200mm is the position representing center line C1.The longitudinal axis represent each body to be tested apart from arbitrary datum mark, engage after height.The height everywhere that the distance towards bearing of trend from the front end of each body to be tested is 50mm, 200mm, 400mm, 600mm, 800mm, 950mm is calculated.

As shown in Figure 50,51, in type i, Type II, the highest at the height of the position of width=180mm, minimum at the height of the position of width=210mm.That is, bonding part forms slight concave shape.In addition, on the difference of height of the position of width=180mm ~ 210mm, Type II is larger than type i.In addition, on the difference of height of the position of in the width direction=210mm to the right-hand member of body to be tested, Type II is also large than type i.That is, can know that the angular deformation of Type II is larger than the angular deformation of type i on the whole.

Can this is presumably because as shown in Figure 49 (a) and Figure 49 (b), caused by the difference that double face slab 201A, 201B are subject to the force direction of twin shaft shoulder stirring-head type instrument 265 and the engaging form of double face slab 201A, 201B.Can expect making the twin shaft shoulder stirring-head type instrument 265 (helicla flute 255 of threaded 254 is left-hand thread) of present embodiment towards right rotation, and when moving toward rear side outside the paper of Figure 49, effect has stress F1.

Therefore, if the Type II shown in Figure 49 (b), then due to the incline direction of the inclined plane Ma of holding section M and the action direction of stress F1 almost parallel, and stress F1 is positioned at the same side relative to the input position of center line C1 and inclined plane Ma, therefore, easily towards the right side, tiltedly below is mobile for double face slab 201B, thus the possibility that in joint, double face slab 201A, 201B divide out is improved.

On the other hand, if the type i shown in Figure 49 (a), incline direction then due to the inclined plane Ma of holding section M is crossing with the action direction of stress F1, and stress F1 is positioned at opposition side relative to the input position of center line C1 and inclined plane Ma, therefore, it is possible to effectively prevent double face slab 201A, 201B in joint from dividing out.

In addition, as in figure 52, in type-iii, be that the position of 180mm is roughly the same with the height of the position being 210mm at width at width.That is, compared with the end of left and right, bonding part is the highest, observes in mountain type from front.In addition, the difference of height of type-iii is also large than the difference of height of type i, II.Suppose to configure polylith (such as five pieces) double face slab, and as type-iii from N side, docking section friction-stir engage, then can think that the angular deformation amount of double face slab entirety after engaging can increase.Therefore, from the viewpoint of bond strength, it is all no problem no matter first to engage which in holding section M and docking section N, if but consider angular deformation amount, it is preferable that, first carry out friction-stir joint from M side, holding section.

Figure 53 is the table after the direction of rotation of twin shaft shoulder stirring-head type instrument, spiral fluted coiling direction, engaging form being gathered.In Figure 53, show the optimum condition 1 ~ 4 of Four types.As condition 1 (with present embodiment with) shown in, make helicla flute be the twin shaft shoulder stirring-head type instrument 265 of left-hand thread towards right rotation, and outside the paper of Figure 53 towards rear side movement, the preferred Selective type I of engaging form.

That is, in condition 1, owing to making twin shaft shoulder stirring-head type instrument 265 towards right rotation, therefore, effect have relative to center line C1 from left side the component towards the direction on right side, and the metal after plastification flowing can be guided by helicla flute, and moves down from upper.Therefore, in condition 1, as shown in engaging form, effect has stress F1.Thus, in type i, by arranging the inclined plane Ma of the second hook portion 212B and holding section M in the mode relative with stress F1, thus can prevent double face slab 201A, 201B in joint from dividing out.

In addition, as shown in condition 2, make helicla flute be the twin shaft shoulder stirring-head type instrument 265 of right-hand thread towards anticlockwise, and outside the paper of Figure 53 towards rear side movement, engaging form preferred Selective type II.

That is, in condition 2, owing to making twin shaft shoulder stirring-head type instrument 265 towards anticlockwise, therefore, effect have relative to center line C1 from right side the component towards the direction in left side, and the metal after plastification flowing can be guided by helicla flute, and moves down from upper.Therefore, in condition 2, as shown in engaging form, effect has stress F2.Thus, in Type II, by arranging the inclined plane Ma of the second hook portion 212B and holding section M in the mode relative with stress F2, thus can prevent double face slab 201A, 201B in joint from dividing out.

Similarly, as shown in condition 3, make helicla flute be the twin shaft shoulder stirring-head type instrument 265 of right-hand thread towards right rotation, and outside the paper of Figure 53 towards rear side movement, engaging form preferred Selective type IV.

Similarly, as shown in condition 4, make helicla flute be the twin shaft shoulder stirring-head type instrument 265 of left-hand thread towards anticlockwise, and outside the paper of Figure 53 towards rear side movement, engaging form preferred Selective type V.

Even if when condition 3, condition 4, by arranging inclined plane Ma ' and the second hook portion 212B ' of snap-latch surface M in the mode relative with stress F3, F4, thus in preventing from engaging double face slab 201A ', 201B ' be separately.

In addition, in condition 1, condition 2, it is preferable that, covering part is set in the first side, shaft shoulder portion 252, in condition 3,4, it is preferable that, covering part is set in the second side, shaft shoulder portion 253.By this, metal can be added to the side making metal deficiency because of friction-stir, therefore, it is possible to it is not enough to supplement metal.

< embodiment 5>

In embodiment 5, use five pieces and carry out friction-stir joint with the double face slab of embodiment 4 different size.If with reference to Figure 20, the double face slab of embodiment 5 is set to makes the thickness b=0.5mm of the thickness of slab a=4.0mm of outside heavy section, covering part, left and right width dimensions e=400mm, prolongation is of a size of 12500mm.

If with reference to Figure 23, twin shaft shoulder stirring-head type tool settings becomes to make diameter α 2=15mm, the diameter β 1=18mm in the second shaft shoulder portion 253, the diameter β 2=15mm of the upper surface 253c in the second shaft shoulder portion 253, the external diameter U=9mm of threaded 254 of the lower surface 252c in the first shaft shoulder portion 252.3.7mm is set as from the length (length of the exposed portion of threaded 254) in the first shaft shoulder portion of shaft shoulder portion 252 to the second 253.In addition, the rotary speed of twin shaft shoulder stirring-head type instrument is set as 1000rpm.In addition, the translational speed of twin shaft shoulder stirring-head type 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 move freely.And use the horizontal pressing tongs be configured on extending direction with 1.5m interval to press, can not float to make assembly.In addition, four of assembly corners are clamped simply.Then, from one end, friction-stir joint is carried out successively.

Even if under the condition of embodiment 5, also can produce and not engage bad face component.At this, in general, when carrying out friction-stir to hardware and engaging, the hardware generation warpage after joint is made sometimes because of thermal contraction.Suppose when friction-stir joint is carried out at the surface of hardware, the back side, with the rotary speed of the throw of the same terms, translational speed and movable length, after friction-stir joint is carried out to the surface of hardware, carry out friction-stir joint to rear side, then the rear side of hardware may be warped into concavity.

This is due to after friction-stir joint is carried out in effects on surface side, because thermal contraction can make hardware form concavity in face side, therefore, is turned over by hardware when being placed on smooth desktop, and the gap between desktop and hardware just can be made to become large.In this state, if carry out friction-stir joint to rear side, then the heat produced by friction-stir is just not easy to dissipate to desktop, therefore, heat residual on hardware is increased.Consequently, owing to residuing in the acting in conjunction of the heat of hardware, rear side is made to be 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 be set to that to move degree of hastening than the twin shaft shoulder stirring-head type instrument of holding section M fast, just can prevent the heat entering docking section during joint.By this, the double face slab warpage after engaging can be prevented.

< embodiment 6>

In embodiment 6, in order to investigate the relation between the thickness of slab of plate-shaped end and length and test.As shown in Figure 54 (a), the body to be tested 401,301 by two pieces of cross sections being the same shape of U-shaped docks, and carries out friction-stir joint to docking section N.Each body to be tested 401 comprises supporting member 402, from the vertically extended plate-shaped end 403 of supporting member.

The height of body 401 to be tested is set as 30mm, extends size and is set as 500mm.As shown in Figure 54 (a), Figure 54 (b), using the thickness of slab a of plate-shaped end 403 and from supporting member 402 to the length c of the front end of plate-shaped end 403 as parameter, carry out friction-stir joint in each condition.In Figure 54 (b), each condition of embodiment 6 and bond quality are aggregated into table.The size of twin shaft shoulder stirring-head type instrument is as shown in the table of Figure 54 (b).

As shown in Figure 54 (b), thickness of slab a=3mm, from supporting member 402 to the length c=50mm of the front end of plate-shaped end 403 time, can produce engage bad.In addition, when thickness of slab a=6mm, when length c=70mm, 80mm can produce engage bad.When thickness of slab a=12mm, joint can be produced as length c=120mm bad.That is, if the length of plate-shaped end 403 is long relative to supporting member 402, then the front of plate-shaped end 403 is easily out of shape, and therefore easily causes joint bad.

Figure 55 is the figure of the dependency relation representing embodiment 6.The transverse axis of Figure 55 represents thickness of slab a, and the longitudinal axis represents the length c from supporting member 402 to the front end of plate-shaped end 403.From this figure, it is preferable that, the length c from supporting member to front end is set to the condition meeting c≤7.0 × thickness of slab a+18.5mm.As long as under these conditions, just can suppress the distortion of plate-shaped end 403, therefore, be not easy to produce joint bad.

(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

11 first shaft shoulder portions

12 second shaft shoulder portions

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)

Distance between Z axis shoulder

Claims

1. a friction stirring connecting method, use throw unit, engage pair of metal plate, wherein, described throw unit has:

Cylindric keeper, the keeper of this cylindrical shape is fixed on the chuck portion of friction-stir device;

Sliding axle, this sliding axle can be inserted into the inside of described keeper, and rotates integratedly with described keeper; And

Twin shaft shoulder stirring-head type instrument, this twin shaft shoulder stirring-head type instrument is made up of the first shaft shoulder portion, the second shaft shoulder portion and the threaded that formed between described first shaft shoulder portion and described second shaft shoulder portion,

Described first shaft shoulder portion comprises large-diameter portion, tapering and lower surface, described tapering undergauge gradually downward,

Described second shaft shoulder portion comprises large-diameter portion, tapering and upper surface, described tapering undergauge gradually upward,

Described first shaft shoulder portion is fixed on the front end of described sliding axle,

Described sliding axle slides in the axial direction relative to described keeper,

It is characterized in that,

Described friction stirring connecting method has:

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

Bonding process, in this bonding process, makes the threaded of the described twin shaft shoulder stirring-head type instrument of rotation move to the docking section of described end face being docked each other rear formation, described end face is carried out friction-stir joint each other,

In described bonding process, in advance the distance between the first shaft shoulder portion and the second shaft shoulder portion is set as below the thickness of described metallic plate, be out of shape when making described metallic plate because of friction-stir, when making the position of described metallic plate along described twin shaft shoulder stirring-head type instrument axially displaced, described twin shaft shoulder stirring-head type instrument moves vertically along with the displacement of described metallic plate.

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

By in the described shaft shoulder, the diameter in face that contacts with described metallic plate sets X (mm), the external diameter of described threaded is set to Y (mm), the distance between described shaft shoulder portion is set to Z (mm) time, X, Y, Z meet following formula (1), (2)

Y ²/(X ²－Y ²)＞0.2……(1)

Y ²/(YZ)＞1.2………(2)。

3. friction stirring connecting method as claimed in claim 1, is characterized in that,

When described end face gap is to each other set as below 1.00mm,

Distance between the thickness of described metallic plate and described shaft shoulder portion is set to and meets 0.2mm≤{ (thickness of metallic plate)-(distance between shaft shoulder portion) }≤0.8mm.

4. friction stirring connecting method as claimed in claim 1, is characterized in that,

When described end face gap being to each other set greater than 1.00mm and for below 1.75mm,

Distance between the thickness of described metallic plate and described shaft shoulder portion is set to and meets 0.4mm≤{ (thickness of metallic plate)-(distance between shaft shoulder portion) }≤0.8mm.

5. friction stirring connecting method as claimed in claim 1, is characterized in that,

By in the described shaft shoulder, the diameter in face that contacts with described metallic plate sets X (mm), the external diameter of described threaded is set to Y (mm) time, X, Y meet following formula (3),

X ²/Y ²＞2.0……(3)。

6. friction stirring connecting method as claimed in claim 1, is characterized in that,

In described bonding process, the thickness of the described metallic plate of the part after docking is different, when described metallic plate larger for the thickness of described metallic plate is configured in left side relative to the direct of travel of described twin shaft shoulder stirring-head type instrument, make described twin shaft shoulder stirring-head type instrument towards right rotation.

7. friction stirring connecting method as claimed in claim 1, is characterized in that,

In described bonding process, the thickness of the described metallic plate of the part after docking is different, when described metallic plate larger for the thickness of described metallic plate is configured in right side relative to the direct of travel of described twin shaft shoulder stirring-head type instrument, make described twin shaft shoulder stirring-head type instrument towards anticlockwise.