CN103801818B - A kind of plug-in type flowage friction spot welding method and instrument thereof - Google Patents
A kind of plug-in type flowage friction spot welding method and instrument thereof Download PDFInfo
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- CN103801818B CN103801818B CN201410077971.6A CN201410077971A CN103801818B CN 103801818 B CN103801818 B CN 103801818B CN 201410077971 A CN201410077971 A CN 201410077971A CN 103801818 B CN103801818 B CN 103801818B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
- B23K20/122—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
- B23K20/122—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding
- B23K20/1245—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding characterised by the apparatus
- B23K20/1255—Tools therefor, e.g. characterised by the shape of the probe
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Abstract
The invention discloses a kind of plug-in type flowage friction spot welding method and instrument thereof, this spot-welding tool comprise from the inside to the outside suit successively and relative sliding arrange backfill pin, the friction head with through chamber and clamp sleeve, in the through chamber of described friction head end, be provided with at least one dividing plate vertically, form at least two build-in cavities; At the end fluting of described backfill pin, formed respectively with the pin wooden fork of the corresponding cooperation of each described build-in cavities, described pin wooden fork can slide along described build-in cavities, and the end face of described pin wooden fork can be in same plane with the end face of the end face of described friction head end and described clamp sleeve.It is smooth without keyhole that the present invention had both remained backfill type friction stir spot welding pad surface, turn eliminates the inhomogeneities of joint interior tissue.
Description
Technical field
The present invention relates to a kind of without keyhole friction spot welding, particularly relate to a kind of plug-in type flowage friction spot welding method and instrument thereof, belong to an interconnection technique field, being applicable to of the same race or xenogenesis can the some connection of thermoplastification material.
Background technology
Friction stir spot welding is the novel solid phase joining technique that of growing up on friction stir welding basis has market application foreground.Compared with the interconnection technique such as resistance spot welding, riveted joint, friction stir spot welding method has the following advantages: 1, power consumption is few, and cost is low, there are some researches show, friction stir spot welding power consumption compared with resistance spot welding can reduce 99%; 2, compared with resistance spot welding, joint quality is high, ratio of defects is low, it is little to be out of shape, welding quality stable; 3, working environment cleans, and friction stir spot welding does not have dust and smog, does not need big current, and production process cleans, and can not produce electromagnetism and noise pollution, belong to green non-pollution technique.
At present, stirring friction spot welding technology develops various ways, as conventional friction stir spot welding, flowage friction spot welding, backfill type friction stir spot welding etc.Flowage friction weld nugget smooth surface, complete, without keyhole, but it is less to weld thickness.Backfill type friction stir spot is welded in and ensures that pad surface is without under the prerequisite of keyhole, substantially increases and can weld thickness.
But, in existing backfill type friction stir spot welding welding process, because the shaft shoulder penetrating materials to be welded fully can not stir whole spot area, cause weld zone interior tissue distribution comparatively complicated, and easily there is the defects such as loose and Weak link, these problems cause backfill type friction stir spot welding joint fatigue performance still not as the convention stir friction spot welding joint of band keyhole, and fatigue behaviour seems particularly important in aerospace component.Therefore be necessary a kind of new spot welding method of invention and instrument thereof, have the advantage of backfill type friction stir spot welding and flowage friction spot welding concurrently, abandon both shortcomings simultaneously, the tack-weld that can not obtain without keyhole, superior performance by the restriction of throat thickness.
Summary of the invention
The object of the invention is for Problems existing in existing flowage friction spot welding and backfill type stirring friction spot welding technology, a kind of plug-in type flowage friction spot-welding tool is provided, it is smooth without keyhole that this plug-in type flowage friction spot-welding tool had both remained backfill type friction stir spot welding pad surface, turn eliminates the inhomogeneities of joint interior tissue.
Another object of the present invention is to provide a kind of plug-in type flowage friction spot welding method, and it is smooth without keyhole that this plug-in type flowage friction spot welding method had both remained backfill type friction stir spot welding pad surface, turn eliminates the inhomogeneities of joint interior tissue.
For achieving the above object, the present invention proposes a kind of plug-in type flowage friction spot-welding tool, comprise and being set with successively from the inside to the outside and the backfill pin of relative sliding setting, the friction head with through chamber and clamp sleeve, in the through chamber of described friction head end, be provided with at least one dividing plate vertically, form at least two build-in cavities; At the end fluting of described backfill pin, formed respectively with the pin wooden fork of the corresponding cooperation of each described build-in cavities, described pin wooden fork can slide along described build-in cavities, and the end face of described pin wooden fork can be in same plane with the end face of the end face of described friction head end and described clamp sleeve.
Plug-in type flowage friction spot-welding tool as above, wherein, is also circumferentially evenly provided with three dividing plates around the central shaft in described through chamber in the through chamber of described friction head end, forms three build-in cavities.
Plug-in type flowage friction spot-welding tool as above, wherein, is provided with four dividing plates in cross-shaped in the through chamber of described friction head end, forms four build-in cavities.
Plug-in type flowage friction spot-welding tool as above wherein, is shiny surface at the end face of described friction head end.
Plug-in type flowage friction spot-welding tool as above, wherein, the end face of described friction head end is the convex surface with concentric ring or threaded line or vortex-like line.
Present invention also offers a kind of plug-in type flowage friction spot welding method, adopt plug-in type flowage friction spot-welding tool as above, described method comprises:
Steps A: by the end face of friction head, backfill pin and clamp sleeve, described friction head, backfill pin and clamp sleeve axis and welded piece perpendicular, the position to be welded on welded piece surface described in described friction head, backfill pin and clamp sleeve orientation of its axis, now described friction head and the described position of selling that backfills are initial position; Described friction head, backfill pin and clamp sleeve entirety are pressed to described welded piece surface, ensures that welded piece compresses by clamp sleeve; Afterwards, drive described friction head and backfill pin High Rotation Speed, and phase mutual friction surperficial with described welded piece, the frictional heat of generation makes the plasticizing of welded piece surface, forms Plastic Flow material area;
Step B: keep described friction head and backfill pin High Rotation Speed state, drive described friction head to move down along axis simultaneously, and be pressed into welded piece, drive described backfill to sell and move up along axis; Along with the press-in of described friction head end, the described Plastic Flow material area degree of depth expands gradually, and in the build-in cavities of described friction head reserved after the pin wooden fork resinifying agent in Plastic Flow material area being expressed to described backfill pin moves;
Step C: continue to keep described friction head and described backfill pin High Rotation Speed state, described friction head continues to move down, and described backfill pin continues to move up, and makes described resinifying agent be expressed in described build-in cavities;
Step D: after the end of described friction head arrives the predetermined depth of weld, described friction head is driven to move up, drive described backfill pin to move down simultaneously, make the resinifying agent in described build-in cavities by reverse extrusion and be backfilled in the Plastic Flow material area of described welded piece surface formation gradually;
Step e: drive described friction head to move up and described backfill pin moves down and gets back to initial position, under the effect of the pin wooden fork downward pressure of described backfill pin, resinifying agent in described build-in cavities is backfilled in described Plastic Flow material area, and flush with welded piece surface, described friction head and backfill pin stop the rotation motion, after resinifying agent cooling, the region after backfill formed one complete, without the solder joint of keyhole;
Step F: described friction head, backfill pin and clamp sleeve entirety are moved up, be separated with welded piece, pinpoint welding procedure completes.
Plug-in type flowage friction spot welding method as above, wherein, described welded piece is that two block welding part docking form, and the described predetermined depth of weld is that the end face of described friction head is displaced downwardly to close to described weldment lower surface 0.1mm ~ 0.3mm position.
Plug-in type flowage friction spot-welding tool as above, wherein, described welded piece forms at least two block welding parts overlap joints, the described predetermined depth of weld be the end face of described friction head be moved downward to orlop weldment upper surface below position.
Compared with prior art, the present invention has following characteristics and advantage:
Plug-in type flowage friction spot-welding tool of the present invention and spot welding method thereof overcome existing flowage friction spot welding to the restriction can welding thickness, perfection remains the smooth advantage without keyhole of backfill type friction stir spot welding pad surface, simultaneously, because friction head internal cavities departs from friction head axis, thus make plastifying material also have circumferential migratory behaviour while axial migration, ensure that fully moving of whole spot area thermoplastification material on a large scale, non-migratory dead angle, effectively eliminate the discontinuous shortcoming even producing cavity of joint microstructure that backfill type friction stir spot welding is separated from each other due to shaft shoulder stirring area and mixing needle back filled region and causes.
Accompanying drawing explanation
Accompanying drawing described here only for task of explanation, and is not intended to limit scope disclosed by the invention by any way.In addition, the shape of each parts in figure and proportional sizes etc. are only schematic, for helping the understanding of the present invention, are not the shape and the proportional sizes that specifically limit each parts of the present invention.Those skilled in the art under the teachings of the present invention, can select various possible shape and proportional sizes to implement the present invention as the case may be.
Fig. 1 is the structural representation of plug-in type flowage friction spot-welding tool of the present invention;
Fig. 2 A is the partial structurtes schematic diagram of backfill pin of the present invention;
Fig. 2 B is the partial structurtes schematic diagram of friction head of the present invention;
Fig. 2 C is the partial structurtes schematic diagram of clamp sleeve of the present invention;
Fig. 3 A is the end face structure schematic diagram of plug-in type flowage friction spot-welding tool embodiment one of the present invention;
Fig. 3 B is the end face structure schematic diagram of plug-in type flowage friction spot-welding tool embodiment two of the present invention;
Fig. 3 C is the end face structure schematic diagram of plug-in type flowage friction spot-welding tool embodiment three of the present invention;
Fig. 4 is the using state schematic diagram of plug-in type flowage friction spot-welding tool of the present invention when spot welding overlap joint workpiece;
Fig. 5 is the using state schematic diagram of plug-in type flowage friction spot-welding tool of the present invention when spot welding docking workpiece.
Description of reference numerals:
1-backfills pin; 11-sells wooden fork; 12-slots; 2-friction head; 21-dividing plate; 22-build-in cavities; 3-clamp sleeve;
4-welded piece; 41,42-overlap welding fitting; 43,44-butt welding fitting; 5-Plastic Flow material area.
Detailed description of the invention
By reference to the accompanying drawings with the description of the specific embodiment of the invention, can clearly understand details of the present invention.But the specific embodiment of the present invention described here, only for explaining object of the present invention, and can not to be understood as by any way be limitation of the present invention.Under the teachings of the present invention, technical staff can conceive based on distortion possible arbitrarily of the present invention, and these all should be regarded as belonging to scope of the present invention.
Please refer to Fig. 1, Fig. 2 A, Fig. 2 B, Fig. 2 C, Fig. 1 is the structural representation of plug-in type flowage friction spot-welding tool of the present invention; Fig. 2 A is the partial structurtes schematic diagram of backfill pin of the present invention; Fig. 2 B is the partial structurtes schematic diagram of friction head of the present invention; Fig. 2 C is the partial structurtes schematic diagram of clamp sleeve of the present invention.As shown in the figure, the plug-in type flowage friction spot-welding tool that the present invention proposes, comprise and being set with successively from the inside to the outside and the backfill pin 1 of relative sliding setting, the friction head 2 with through chamber and clamp sleeve 3, in the through chamber of friction head 2 end, be provided with at least one dividing plate 21 vertically, form at least two build-in cavities 22; At the end fluting 12 of backfill pin 1, formed respectively with the pin wooden fork 11 of the corresponding cooperation of each build-in cavities 22, pin wooden fork 11 to insert in each self-corresponding build-in cavities 22 and can slide along build-in cavities 22, realizes in pinpoint welding procedure, sell the plug function of wooden fork 11 relative to build-in cavities 22.When original state, the pin end face of wooden fork 11 and the end face of friction head 2 end and the end face of clamp sleeve 3 are in same plane, along with moving dorsad of pin wooden fork 11 and friction head 2, the end of friction head 2 can penetrate welded piece, whole spot area is fully stirred, effectively eliminates the shortcoming of backfill type friction stir spot welding joint microstructure complex distribution; Along with friction head 2 and pin wooden fork 11 move in opposite directions, in the process that friction head 2 is bounced back, plastifying material thing is backfilled to spot area, to retain the advantage of backfill type friction stir spot welding joint surface without keyhole.
As shown in Figure 3A, in a kind of optional embodiment of the present invention, a dividing plate 21 is provided with in friction head 2 end, the cavity of friction head 2 end is divided into two build-in cavities 22 by this dividing plate 21, accordingly, the end opens of backfill pin 1 has a fluting 12, forms the pin wooden fork 11 of the grafting that to match with two build-in cavities 22.As shown in Figure 3 B, in the another kind of optional embodiment of the present invention, three dividing plates 21 that the build-in cavities 22 of friction head 2 end is circumferentially evenly laid by the central shaft around the through chamber of friction head 2 are formed, and form the build-in cavities 22 of trident; Accordingly, the end fluting backfilling pin 1 forms the pin wooden fork 11 of trident.As shown in Figure 3 C, in another optional embodiment of the present invention, the build-in cavities 22 of friction head 2 end is provided with four dividing plates 21 forms four build-in cavities 22 by cross-shaped, accordingly, and four dividing plates 21 that the end fluting formation four of backfill pin 1 is corresponding with build-in cavities 22.
In the present embodiment, the end face of friction head 2 end is shiny surface.In order to strengthen mixing effect, be the convex surface with concentric ring or threaded line or vortex-like line at the end face of friction head 2 end.
In the present invention, pin wooden fork 11 and build-in cavities 22 blind-mate, and ensure that friction head 2 and pin wooden fork 11 front end face can be in same plane.Meanwhile, friction head 2 can produce again relative motion vertically with backfill pin 1, makes pin wooden fork 11 form piston movement in the build-in cavities 22 of friction head 2.
As shown in Figure 4, Figure 5, present invention also offers a kind of plug-in type flowage friction spot welding method, adopt plug-in type flowage friction spot-welding tool as above.Before welding, welded piece 4 is placed on jig, backfill pin 1 is placed in friction head 2, friction head 2 is placed in clamp sleeve 3, pin wooden fork 11 and build-in cavities 22 blind-mate, end face and the end face of friction head 2 end and the end face of clamp sleeve 3 of pin wooden fork 11 are in same plane, and make the end face of backfill pin 1, friction head 2 and clamp sleeve 3 be pressed on the surperficial position to be welded of welded piece 4, and apply certain pressure.
Described method comprises:
Steps A: by the end face of friction head 2, backfill pin 1 and clamp sleeve 3, friction head 2, backfill pin 1 and clamp sleeve 3 axis and welded piece perpendicular, friction head 2, backfill pin 1 and the position to be welded on clamp sleeve 3 orientation of its axis welded piece 4 surface, now friction head 2 is initial position with the position of backfill pin 1; Friction head 2, backfill pin 1 and clamp sleeve 3 entirety are pressed to welded piece 4 surface, ensures that welded piece compresses by clamp sleeve 3; Afterwards, drive friction head 2 and backfill pin 1 High Rotation Speed, and phase mutual friction surperficial with welded piece 4, the frictional heat of generation makes the plasticizing of welded piece surface, forms Plastic Flow material area 5;
Step B: keep friction head 2 and backfill pin 1 High Rotation Speed state, drive friction head 2 to move down along axis simultaneously, and be pressed into welded piece 4, drive backfill pin 1 to move up along axis; Along with the press-in of friction head 2 end, Plastic Flow material area 5 degree of depth expands gradually, and in the build-in cavities 22 of friction head 1 reserved after the pin wooden fork resinifying agent in Plastic Flow material area 5 being expressed to backfill pin 1 moves;
Step C: continue to keep friction head 2 and backfill pin 1 High Rotation Speed state, friction head 2 continues to move down, and backfill pin 1 continues to move up, and makes the resinifying agent in Plastic Flow material area 5 be extruded in build-in cavities 22;
Step D: after the end of friction head 2 arrives the predetermined depth of weld, friction head 2 is driven to move up, drive backfill pin 1 to move down simultaneously, make the resinifying agent in build-in cavities 22 by reverse extrusion and be backfilled in the surperficial Plastic Flow material area 5 formed of welded piece 4 gradually;
Step e: drive friction head 2 to move up and backfill pin 1 and move down and get back to initial position, under the effect of pin wooden fork 11 downward pressure of backfill pin 1, resinifying agent in build-in cavities 22 is backfilled in Plastic Flow material area 5, and flush with welded piece 4 surface, friction head 2 and backfill pin 1 stop the rotation motion, after resinifying agent cooling, the region after backfill formed one complete, without the solder joint of keyhole;
Step F: friction head 2, backfill pin 1 and clamp sleeve 3 entirety are moved up, be separated with welded piece 4, pinpoint welding procedure completes.
As shown in Figure 4, as a kind of optional embodiment of the present invention, welded piece 4 is that two block welding part 41,42 overlap joints form, according to overlap joint, weldment 41,42 requires that clamping is fixed, friction head 2, backfill pin 1 and clamp sleeve 3 synchronizing moving, press to welded piece 4 upper surface and apply certain pressure, friction head 2, backfill pin 1 are with identical direction of rotation and rotary speed High Rotation Speed, and phase mutual friction surperficial with welded piece 4; Friction head 2 moves down along axis under High Rotation Speed state, insert welded piece 4, backfill pin 1 to move up under High Rotation Speed state, friction head 2, backfill pin 1 translational speed vertically meet following sequencing relation simultaneously: the plastifying material volume that friction head 2 is extruded is identical with spatial volume backfill pin 1 moving formation; Friction head 2 stops moving down when being moved downward to the interface 0.1mm ~ 0.2mm crossing between weldment 41,42 in lower surface, but keeps High Rotation Speed, and after stopping about 1 second time, friction head 2, backfill pin 1 start to move in the other direction along axis; Friction head 2, backfill pin 1 lower surface move to and stop during welded piece 4 upper surface flush moving axially and rotary motion; Move on friction head 2, backfill pin 1 and clamp sleeve 3 are synchronous, complete the overlap joint spot welding between weldment 41,42.Namely the predetermined depth of weld be the end face of described friction head be moved downward to orlop weldment upper surface below position, to ensure that two block welding parts weld together.Welded piece 4 also can be overlapped by three pieces, four pieces or more block welding parts and form, and the present invention is not restricted this.
As shown in Figure 5, as the another kind of optional embodiment of the present invention, welded piece 4 is that two block welding part 43,44 docking form, and the predetermined depth of weld is that the end face of friction head 2 is displaced downwardly to close to weldment 43,44 lower surface 0.1mm ~ 0.3mm position, to ensure that two block welding parts weld together.Detailed process is: according to docking, weldment 43,44 requires that clamping is fixed, friction head 2, backfill pin 1 and clamp sleeve 3 axis aim at weldment 43,44 abutment joint, press to weldment 43,44 upper surface and apply certain pressure, friction head 2, backfill pin 1 with identical direction of rotation and rotary speed High Rotation Speed, and with the surperficial phase mutual friction of welded piece 43,44; Friction head 2 moves down along axis under High Rotation Speed state, insert welded piece 4, backfill pin 1 to move up under High Rotation Speed state, friction head 2, backfill pin 1 translational speed meet following sequencing relation simultaneously: the plastifying material volume that friction head 2 is extruded is identical with spatial volume backfill pin 1 moving formation; Friction head 2 stops moving down when being moved downward to distance weldment 43,44 lower surface 0.1mm, but keeps High Rotation Speed, and after stopping about 1 second time, friction head 2, backfill pin 1 start along axis mobile in the other direction; Friction head 2, backfill pin 1 lower surface move to and stop when weldment 43,44 upper surface flush moving axially and rotary motion; Move on friction head 2, backfill pin 1 and clamp sleeve 3 are synchronous, complete the butt welding in spot between weldment 43,44.
In addition, the present invention can also fill in homogeneous material in friction welding (FW) keyhole position, makes to fill in material volume and is more than or equal to keyhole volume, carry out spot welding according to the mode shown in Fig. 5 to keyhole position, thus realizes the elimination to friction stir welding keyhole.
Plug-in type flowage friction spot-welding tool of the present invention and spot welding method thereof, adopt and comprise the friction head with 2 to 4 build-in cavities, the backfill pin friction head with 2 to 4 pin wooden forks and backfill pin High Rotation Speed, with friction of workpiece, for welding process provides heat.Friction head entirety inserts the materials to be welded of thermoplastification, and along with backfill pin moves up, the material of thermoplastification is all extruded along friction head internal cavities.Due to friction head internal cavities off-axis, the plastifying material therefore clamp-oning cavity also will form circumference migration while axial migration, thus ensure that effective elimination of the original interface of materials to be welded.The present invention improves tack-weld tissue, improving joint performance, is a kind of brand-new solidus interconnection technique, at wall panel structure part, point as aircraft band muscle wallboard, car crust etc. connects, and the engineer applied field such as tack welding, defect mending before the docking of long weld seam has great potential.
Plug-in type flowage friction spot-welding tool of the present invention and spot welding method thereof overcome existing flowage friction spot welding to the restriction can welding thickness, perfection remains the smooth advantage without keyhole of backfill type friction stir spot welding pad surface, simultaneously, because friction head internal cavities departs from friction head axis, thus make plastifying material also have circumferential migratory behaviour while axial migration, ensure that fully moving of whole spot area thermoplastification material on a large scale, non-migratory dead angle, effectively eliminate the discontinuous shortcoming even producing cavity of joint microstructure that backfill type friction stir spot welding is separated from each other due to shaft shoulder stirring area and mixing needle back filled region and causes.
In sum, plug-in type flowage friction spot welding of the present invention does not have keyhole compared with existing friction stir spot welding, compared with existing flowage friction spot welding can throat thickness larger, joint forming process is more reasonable compared with existing backfill type friction stir spot welding, therefore plug-in type flowage friction spot welding of the present invention is promoting again on existing stirring friction spot welding technology basis, has significant progress.
For the detailed explanation of the respective embodiments described above, its object is only to make an explanation to the present invention, so that the present invention can be understood better, but, it is limitation of the present invention that these descriptions can not become with any explanation, particularly, each feature described in various embodiments also can be combined mutually, thus form other embodiments, except there being clearly contrary description, these features should be understood to can be applied in any one embodiment, and are also not only confined to described embodiment.
Claims (8)
1. a plug-in type flowage friction spot-welding tool, comprise and being set with successively from the inside to the outside and the backfill pin of relative sliding setting, the friction head with through chamber and clamp sleeve, it is characterized in that, in the through chamber of described friction head end, be provided with at least one dividing plate vertically, form at least two build-in cavities; At the end fluting of described backfill pin, formed respectively with the pin wooden fork of the corresponding cooperation of each described build-in cavities, described pin wooden fork can slide along described build-in cavities, and the end face of described pin wooden fork can be in same plane with the end face of the end face of described friction head end and described clamp sleeve.
2. plug-in type flowage friction spot-welding tool as claimed in claim 1, is characterized in that, is also circumferentially evenly provided with three dividing plates, forms three build-in cavities in the through chamber of described friction head end around the central shaft in described through chamber.
3. plug-in type flowage friction spot-welding tool as claimed in claim 1, is characterized in that, is provided with four dividing plates, forms four build-in cavities in the through chamber of described friction head end in cross-shaped.
4. plug-in type flowage friction spot-welding tool as claimed any one in claims 1 to 3, it is characterized in that, be shiny surface at the end face of described friction head end.
5. plug-in type flowage friction spot-welding tool as claimed any one in claims 1 to 3, it is characterized in that, the end face of described friction head end is the convex surface with concentric ring or threaded line or vortex-like line.
6. a plug-in type flowage friction spot welding method, is characterized in that, adopt the plug-in type flowage friction spot-welding tool according to any one of claim 1 to 5, described method comprises:
Steps A: by the end face of friction head, backfill pin and clamp sleeve, described friction head, backfill pin and clamp sleeve axis and welded piece perpendicular, the position to be welded on welded piece surface described in described friction head, backfill pin and clamp sleeve orientation of its axis, now described friction head and the described position of selling that backfills are initial position; Described friction head, backfill pin and clamp sleeve entirety are pressed to described welded piece surface, ensures that welded piece compresses by clamp sleeve; Afterwards, drive described friction head and backfill pin High Rotation Speed, and phase mutual friction surperficial with described welded piece, the frictional heat of generation makes the plasticizing of welded piece surface, forms Plastic Flow material area;
Step B: keep described friction head and backfill pin High Rotation Speed state, drive described friction head to move down along axis simultaneously, and be pressed into welded piece, drive described backfill to sell and move up along axis; Along with the press-in of described friction head end, the described Plastic Flow material area degree of depth expands gradually, and in the build-in cavities of described friction head reserved after the pin wooden fork resinifying agent in Plastic Flow material area being expressed to described backfill pin moves;
Step C: continue to keep described friction head and described backfill pin High Rotation Speed state, described friction head continues to move down, and described backfill pin continues to move up, and makes described resinifying agent be expressed in described build-in cavities;
Step D: after the end of described friction head arrives the predetermined depth of weld, described friction head is driven to move up, drive described backfill pin to move down simultaneously, make the resinifying agent in described build-in cavities by reverse extrusion and be backfilled in the Plastic Flow material area of described welded piece surface formation gradually;
Step e: drive described friction head to move up and described backfill pin moves down and gets back to initial position, under the effect of the pin wooden fork downward pressure of described backfill pin, resinifying agent in described build-in cavities is backfilled in described Plastic Flow material area, and flush with welded piece surface, described friction head and backfill pin stop the rotation motion, after resinifying agent cooling, the region after backfill formed one complete, without the solder joint of keyhole;
Step F: described friction head, backfill pin and clamp sleeve entirety are moved up, be separated with welded piece, pinpoint welding procedure completes.
7. plug-in type flowage friction spot welding method as claimed in claim 6, it is characterized in that, described welded piece is that two block welding part docking form, and the described predetermined depth of weld is that the end face of described friction head is displaced downwardly to close to described weldment lower surface 0.1mm ~ 0.3mm position.
8. plug-in type flowage friction spot welding method as claimed in claim 6, it is characterized in that, described welded piece forms at least two block welding parts overlap joints, the described predetermined depth of weld be the end face of described friction head be moved downward to orlop weldment upper surface below position.
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| CN104227225B (en) * | 2014-09-01 | 2017-02-01 | 西安交通大学 | Agitation friction point braze welding method for metal plate overlap joint combination |
| JP6650801B2 (en) * | 2016-03-17 | 2020-02-19 | 川崎重工業株式会社 | Friction stir spot welding method and friction stir spot welding apparatus |
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Address after: 100024 North East military villa, eight Li bridge, Chaoyang District, Beijing Patentee after: China Institute of Aeronautical Manufacturing Technology Address before: 100024 North East military villa, eight Li bridge, Chaoyang District, Beijing Patentee before: Beijing Aviation Manufacturing Engineering Institute of China Aviation Industry Group Company |