CN106825908A - A kind of device and method without keyhole agitating friction weldering slab - Google Patents
A kind of device and method without keyhole agitating friction weldering slab Download PDFInfo
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- CN106825908A CN106825908A CN201710142251.7A CN201710142251A CN106825908A CN 106825908 A CN106825908 A CN 106825908A CN 201710142251 A CN201710142251 A CN 201710142251A CN 106825908 A CN106825908 A CN 106825908A
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- mixing needle
- pumpback
- shaft shoulder
- fixed seat
- needle
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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
-
- 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
- B23K20/26—Auxiliary equipment
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- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
The present invention provides a kind of device without keyhole agitating friction weldering slab, it is characterised in that including：Pumpback formula stirs needle system, including mixing needle fixed seat, pumpback formula mixing needle and fixed base plate, and multiple chromium-copper electrodes are evenly arranged with the lower end shaft shoulder face of mixing needle fixed seat as shaft shoulder electric conductor；The upper surface of fixed base plate has been embedded in conductive copper plate, and when shaft shoulder electric conductor is in contact with welding workpiece, shaft shoulder electric conductor, welding workpiece and conductive copper plate constitute conductive path；Mixing needle pumpback transmission system, including mixing needle rotating seat and drawn needle main shaft, realize that pumpback formula stirs the connection of needle system and mixing needle pumpback transmission system by bolt；Brush-system, is arranged on the two side end face of mixing needle fixed seat；Resistance concurrent heating system, closure switch are by brush-system for resistance concurrent heating system provides electric current.The invention also discloses the method for work of said apparatus.The present invention is simple to operate, it is to avoid keyhole occur, improves agitating friction welding efficiency and product quality.
Description
Technical field
The invention belongs to welding field, it is related to electric Joule effect and returns shaft type mixing needle, more particularly to one kind is stirred without keyhole
Mix the device and method of friction welding (FW) slab.
Background technology
Agitating friction weldering (Friction Stir Welding, abbreviation FSW) is Britain's institute of welding (TWI) 1991
A kind of Solid-phase welding method of invention.Because its welding temperature is low, materials to be welded is unfused, therefore does not have not only in stirring friction welding seam
Have a melting welding defect, and without splashing, smoke dust, it is radiationless, do not need protective gas, do not need filler wire, do not need scarfing cinder, become
Shape and stress are small, are a kind of new welding technologies of environmental protection low energy consumption.By the development of more than 20 years, agitating friction weldering existed
More and more field popularization and application, can be with successfully welded aluminium alloy, magnesium alloy, copper alloy, titanium alloy, metal, stainless steel, modeling
The materials such as material.But it was verified that agitating friction weldering is applied into engineering welding, also many problems need to solve, particularly
The frictional heat that stirring-head is provided is limited, and friction welding area temperature field is presented the shallow funnel-form of " upper relative superiority or inferiority is low ", easy in the root of weld
There is the defect such as Weak link, lack of penetration, therefore be difficult to weld the slabs such as Al alloys andMg alloys；Welding terminates, with the extraction meeting of mixing needle
Produce keyhole defect；Because the resistance of thick plates is big, deformation is difficult so that the abrasion of stirring-head is also than more serious.
Agitating friction welding principle be：Workpiece to be connected on base plate is fixed by fixture, workpiece is prevented in welding
During the changing of the relative positions.Be made the effigurate stirring tool of tool using a resistant to elevated temperatures hard material, instrument include mixing needle,
The shaft shoulder and supporting rod.Mixing needle is rotatably inserted at a high speed the junction of materials to be welded, mixing needle carries out strong stirring to material
And mixing, when the shaft shoulder is in close contact workpiece surface, mixing needle stops being downwardly into, the frictional heat that now junction constantly produces
Make connecting portion material temperature raise to form plasticity softened zone, then stirring-head is moved straight forward along weld seam, material is carried out
Agitating friction come complete welding.In welding process, stirring rotates at a high speed in front, and the connecting portion of edge workpiece is relative with workpiece
It is mobile, under the mechanical agitation and upset effect that mixing needle side and direction of rotation produce, after softening the metal filled mixing needle of layer
It is square into cavity.Mixing needle and shaft shoulder friction seam, crush oxide-film, stir and recombinate the ground material at mixing needle rear.
The shaft shoulder carries out frictional heat, is also used for preventing the spilling of mecystasis material, while the work for removing surface film oxide can be played
With.Weld seam is formed after the material cooling at mixing needle rear.So weld seam is the solid diffusivity formed under heat, machine synergy.
Generally, the defect inside agitating friction welding can be joined by optimizing the geometry of the shaft shoulder and mixing needle with processing
Count to improve.But, during agitating friction welding slab, the frictional heat provided between the shaft shoulder and workpiece is concentrated mainly on work
Part surface, it is difficult to reach the root of weld, therefore the root of weld is difficult to realize sufficient plasticity and softens and flow, and easily produces root
Defect, therefore be difficult to weld the slabs such as Al alloys andMg alloys, limit the extensive use during agitating friction is welded in slab connection.At present, lead to
Mode frequently with postwelding machining or plug welding eliminates keyhole, but effect is all not good enough, and the pumpback by mixing needle is then a kind of
Efficient keyhole technology for eliminating.In the prior art, have the shaft shoulder is heated by resistance wire, heat conduction block assembly, heat is transmitted to
Workpiece to be welded, but the thermal efficiency is very low, and equipment is cumbersome, is not easy to operation, the finite thickness of solderable workpiece.
The content of the invention
According to technical problem set forth above, and provide a kind of friction stir weld device of solderable Al alloys andMg alloys slab
And method, i.e., without the device and method of keyhole agitating friction weldering slab.Present invention workpiece predominantly to be welded provides a set of efficient
Concurrent heating system, can make to be welded metal and be rapidly achieved visco-plasticity state, mitigate stirring-head upset force, improve speed of welding, then
Improve production efficiency.The root defect of slab is also reduced, joint quality is improve, the abrasion of stirring-head is alleviated, for
The slabs such as Al alloys andMg alloys are connected with important application value；Meanwhile, using stirring-head pumpback, it is to avoid agitating friction weldering spoon
The appearance in hole, improves the quality of agitating friction weldering product.
The technological means that the present invention is used is as follows：
A kind of device without keyhole agitating friction weldering slab, it is characterised in that including：
Pumpback formula stirs needle system, including mixing needle fixed seat, is arranged on the mixing needle fixed seat central through hole
Pumpback formula mixing needle and fixed base plate, the lower end working face of the pumpback formula mixing needle are protruded under the mixing needle fixed seat
End shaft shoulder face, protrusion length and welding workpiece thickness matching, it is uniform on the shaft shoulder face circumference of the mixing needle fixed seat lower end
Multiple chromium-copper electrodes are provided with as shaft shoulder electric conductor, the shaft shoulder electric conductor sets with the internal form of the mixing needle fixed seat
Put and extend to the two side end face of the mixing needle fixed seat；The upper surface of the fixed base plate has been embedded in conductive copper plate,
When the fully-inserted workpiece of pumpback formula mixing needle, the mixing needle fixed seat lower end shaft shoulder face is in close contact with welding workpiece
Afterwards, closure switch, the shaft shoulder electric conductor, the welding workpiece and the conductive copper plate constitute conductive path；
Mixing needle pumpback transmission system, including mixing needle rotating seat and be arranged on the mixing needle rotating seat central through hole
By motor rotate control drawn needle main shaft, be provided with insulation board between the mixing needle fixed seat and the mixing needle rotating seat
And fastened three by bolt, realize the connection of the pumpback formula stirring needle system and the mixing needle pumpback transmission system；
Brush-system, is arranged on the two side end face of the mixing needle fixed seat, including conductive carbon brush, spring, spring
Set between the two side end face of gland, brush box, insulator and brush lead, the conductive carbon brush and the mixing needle fixed seat
There is conductive copper sheathing；
Resistance concurrent heating system, the fixed base plate is extremely connected built with switch with the one of power supply, the brush lead and institute
State the another of power supply to be extremely connected, closure switch are by brush-system for resistance concurrent heating system provides electric current.
Further, it is equipped with insulation sleeve outside the conductive carbon brush, the bolt and the mixing needle rotating seat.
The above-mentioned method without keyhole agitating friction weldering slab is applied the invention also discloses a kind of, it is characterised in that including
Following steps：
S1, welding workpiece is placed on the fixed base plate it is provided with the position of conductive copper plate；
S2, pumpback formula mixing needle insert workpiece, and the shaft shoulder electric conductor is contacted with the welding workpiece, by applying
External power source, closure switch, the shaft shoulder electric conductor, the welding workpiece and the conductive copper plate and the brush-system and outer
Portion electric power generating composition loop, enough heats are produced by electric Joule effect, improve the welding workpiece temperature, promote the modeling of material
Property flowing；
S3, the raising with the welding workpiece temperature, material softening increase material visco-plasticity, allow material fully to flow
Agitating friction weldering of the pumpback formula mixing needle to the welding workpiece (Al alloys andMg alloys uniform thickness plate material) is realized, significant heat
Machine is acted on, and expands material recrystallization region, the postwelding tissue for having been formed；
S4, close to an end with welding, the mixing needle pumpback transmission system starts pumpback rising, starts withdrawn position and arrives
The distance of complete withdrawn position is 5-10 times of mixing needle pumpback amount, and after shaft shoulder end face leaves workpiece, concurrent heating system disconnects, most
Whole face of weld is concordant, without keyhole.
The present invention is applied to the slabs such as the Al alloys andMg alloys that are attached is difficult to because of root defect；The very big upset force of needs,
Need portable agitating friction welding equipment；The stirring-head of serious wear because of heat input and big welding active force higher；
Convention stir friction welding terminates have keyhole to produce, and the present invention utilizes mixing needle pumpback, it is to avoid keyhole is produced.
Simple structure of the present invention, control accuracy is high, low cost.Even if under colder welding condition, using small rotation
The temperature of the slab root area such as speed ratio, Al alloys andMg alloys can also reach very high.But electric current is not to flow completely through weld seam, is had
Part is scattered and disappeared by stirring-head, mixing needle fixed seat and fixed base plate, suitably to be increased electric current and be compensated.
The present invention provides electric current using external power source, shaft shoulder electric conductor, welding workpiece and conductive copper plate and brush-system and
Apply external power source and constitute loop, because Joule effect produces heat, improve the visco-plasticity of the region material, it is possible to achieve right
The agitating friction welding of the slabs such as Al alloys andMg alloys.Meanwhile, using pumpback formula mixing needle, keyhole defect will not be produced.Pumpback speed
It is good with amount of feeding controllability, pumpback high precision, it is easy to accomplish, it is simple to operate, improve agitating friction welding efficiency and product
Quality.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
The accompanying drawing to be used needed for having technology description does simply to introduce, it should be apparent that, drawings in the following description are this hairs
Some bright embodiments, for those of ordinary skill in the art, without having to pay creative labor, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the structural representation of the device without keyhole agitating friction weldering slab of the invention.
Fig. 2 is the end view of the mixing needle fixed seat for being provided with chromium-copper electrode of the invention.
In figure：1st, fixed base plate；2nd, conductive copper plate；3rd, welding workpiece；4th, brush box；5th, insulator；6th, conductive carbon brush；7、
Shaft shoulder electric conductor；8th, mixing needle rotating seat；9th, insulation sleeve；10th, insulation board；11st, spring；12nd, brush lead；13rd, spring capping；
14th, conductive copper sheathing；15th, mixing needle fixed seat；16th, pumpback formula mixing needle；17th, drawn needle main shaft.
Specific embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
A part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
As shown in figure 1, a kind of device without keyhole agitating friction weldering slab, including：
Pumpback formula stirs needle system, including mixing needle fixed seat 15, is arranged on the central through hole of mixing needle fixed seat 15
On pumpback formula mixing needle 16 and fixed base plate 1, the mixing needle fixed seat 15 is the flange for being arranged on lower end, the mixing needle
The lower end of fixed seat 15 is shaft shoulder end face, and pumpback formula mixing needle 16 is arranged in the central through hole of flange, the pumpback formula stirring
The lower end working face of pin 16 protrudes from the lower end shaft shoulder face of the mixing needle fixed seat 15, protrusion length and the thickness of welding workpiece 3
Matching, is evenly arranged with shaft shoulder electric conductor 7 on the shaft shoulder face circumference of the lower end of mixing needle fixed seat 15, and the shaft shoulder is conductive
Body 7 is to be embedded with to be made up of 6 chromium-copper electrodes on shaft shoulder end face, and concordant with the shaft shoulder；The shaft shoulder electric conductor 7 is with the stirring
The internal form of pin fixed seat 15 sets and extends to the two side end face of the mixing needle fixed seat 15, i.e., shown in figure
" L " type is distributed, and in lower flange two side, the chromium-copper electrode of end face is connected with conductive copper sheathing 14；The upper surface of the fixed base plate 1
Conductive copper plate 2 (being also chromium-copper electrode) is embedded in, when the fully-inserted workpiece of the pumpback formula mixing needle 16, the mixing needle is consolidated
After the lower end shaft shoulder face of reservation 15 is in close contact with welding workpiece 3, the shaft shoulder electric conductor 7, the welding workpiece 3 and the conduction
Copper coin 2 constitutes conductive path；
Mixing needle pumpback transmission system, including mixing needle rotating seat 8 and it is arranged on the central through hole of mixing needle rotating seat 8
On the drawn needle main shaft 17 that control is rotated by motor, the mixing needle rotating seat 8 is to be arranged on the flange of upper end, upper flanges
With spline peace keyway, spline lower end is connected by splined shaft bearing sleeve with lower end flanges, and the drawn needle master is installed on spline
Axle 17；Be provided with insulation board 10 between the mixing needle fixed seat 15 and the mixing needle rotating seat 8, upper flanges by flat key with
The top of pumpback formula mixing needle 16 is connected, and the upper flanges pass through upper flanges, insulation board straight down by 4 bolts
10th, lower end flanges are connected and fastener without passing lower end flanges, realize described pumpback formula stirring needle system and described to stir
Mix the connection of pin pumpback transmission system.
Brush-system, is arranged on the two side end face of the mixing needle fixed seat 15, including conductive carbon brush 6, spring 11,
Spring capping 13, brush box 4, insulator 5 and brush lead 12, the conductive carbon brush 6 and the two of the mixing needle fixed seat 15
Conductive copper sheathing 14 is provided between sidewall end face；It is all provided with outside the conductive carbon brush 6, the bolt and the mixing needle rotating seat 8
There is insulation sleeve.
Resistance concurrent heating system, the fixed base plate 1 built with switch be extremely connected with the one of power supply, the brush lead 12 and
The another of the power supply is extremely connected, and closure switch are by brush-system for resistance concurrent heating system provides electric current.
It is a kind of to apply the above-mentioned method without keyhole agitating friction weldering slab, comprise the following steps：
S1, welding workpiece 3 is placed on the fixed base plate 1 it is provided with the position of conductive copper plate 2；
S2, pumpback formula mixing needle 16 insert workpiece, and the shaft shoulder electric conductor 7 is contacted with the welding workpiece 3, is passed through
Apply external power source, closure switch, the shaft shoulder electric conductor 7, the welding workpiece 3 and the conductive copper plate 2 and the brush
System and applying external power source constitute loop, and enough heats are produced by electric Joule effect, improve the temperature of the welding workpiece 3
Degree；The quality of temperature increment and density of material, specific heat, resistivity, current strength, conduction time, chromium-copper diameter and dissipated heat
It is relevant.
S3, the raising with the temperature of the welding workpiece 3, material softening increase material visco-plasticity, allow material fully to flow
The agitating friction weldering of 16 pairs of welding workpieces 3 of pumpback formula mixing needle (Al alloys andMg alloys uniform thickness plate material) is realized, significantly
Heat engine is acted on, and expands material recrystallization region, the postwelding tissue for having been formed；
S4, close to an end with welding, the mixing needle pumpback transmission system starts pumpback rising, starts withdrawn position and arrives
The distance of complete withdrawn position is 5-10 times of mixing needle pumpback amount, and after shaft shoulder end face leaves workpiece, concurrent heating system disconnects, most
Whole face of weld is concordant, without keyhole.
Embodiment
20mm thickness AA2024-T3 cold-rolled aluminum alloy sheets are docked.Gait of march 200mm/min, rotary speed
1100r/min, shaft shoulder drafts 0.2mm, are not passed through electric current and are passed through two groups of agitating friction welding of current strength 60A.It is logical
Enter root temperature of the electric current sample in welding process and increased 62 DEG C than not being passed through the root temperature of current specimen.
20mm thickness AA6082-T6 cold-rolled aluminum alloy sheets are docked.Gait of march 200mm/min, rotary speed
1200r/min, shaft shoulder drafts 0.2mm, are not passed through electric current and are passed through two groups of agitating friction welding of current strength 90A.It is logical
Enter root temperature of the electric current sample in welding process and increased 53 DEG C than not being passed through the root temperature of current specimen.
20mm thickness AA7075-T6 cold-rolled aluminum alloy sheets are docked.Gait of march 200mm/min, rotary speed
1200r/min, shaft shoulder drafts 0.2mm, are not passed through electric current and are passed through two groups of agitating friction welding of current strength 80A.It is logical
Enter root temperature of the electric current sample in welding process and increased 50 DEG C than not being passed through the root temperature of current specimen.
It can thus be seen that the present invention significantly increases thermal weld stress.For pumpback system, drawn needle main shaft passes through motor
Rotate and rotate, screw thread is left in drawn needle upper end, ballscrew nut fitting is installed, at the end of welding soon, can make to take out by motor
Pin pumpback while rotation moves along a straight line upwards, and the pumpback amount of feeding can be accurate to 0.01mm.Terminate to welding, be not in spoon
Hole.
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations；To the greatest extent
Pipe has been described in detail with reference to foregoing embodiments to the present invention, it will be understood by those within the art that：Its according to
The technical scheme described in foregoing embodiments can so be modified, or which part or all technical characteristic are entered
Row equivalent；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the present invention technology
The scope of scheme.
Claims (3)
1. a kind of device without keyhole agitating friction weldering slab, it is characterised in that including：
Pumpback formula stirs needle system, including mixing needle fixed seat (15), is arranged on mixing needle fixed seat (15) central through hole
On pumpback formula mixing needle (16) and fixed base plate (1), the lower end working face of the pumpback formula mixing needle (16) protrudes from described
The lower end shaft shoulder face of mixing needle fixed seat (15), protrusion length and welding workpiece (3) thickness matching, in the mixing needle fixed seat
(15) multiple chromium-copper electrodes are evenly arranged with the shaft shoulder face circumference of lower end as shaft shoulder electric conductor (7), the shaft shoulder electric conductor
(7) set with the internal form of the mixing needle fixed seat (15) and extend to the two side end of the mixing needle fixed seat (15)
Face；The upper surface of the fixed base plate (1) has been embedded in conductive copper plate (2), when the pumpback formula mixing needle (16) is fully-inserted
Workpiece, after mixing needle fixed seat (15) the lower end shaft shoulder face is in close contact with welding workpiece (3), the shaft shoulder electric conductor (7),
The welding workpiece (3) and the conductive copper plate (2) constitute conductive path；
Mixing needle pumpback transmission system, including mixing needle rotating seat (8) and it is arranged on mixing needle rotating seat (8) central through hole
On the drawn needle main shaft (17) that control is rotated by motor, the mixing needle fixed seat (15) and the mixing needle rotating seat (8)
Between be provided with insulation board (10) and fastened three by bolt, realize that the pumpback formula stirring needle system and the mixing needle are returned
Take out the connection of transmission system；
Brush-system, is arranged on the two side end face of the mixing needle fixed seat (15), including conductive carbon brush (6), spring
(11), spring capping (13), brush box (4), insulator (5) and brush lead (12), the conductive carbon brush (6) and the stirring
Conductive copper sheathing (14) is provided between the two side end face of pin fixed seat (15)；
Resistance concurrent heating system, the fixed base plate (1) built with switch be extremely connected with the one of power supply, the brush lead (12) and
The another of the power supply is extremely connected, and closure switch are by brush-system for resistance concurrent heating system provides electric current.
2. the device without keyhole agitating friction weldering slab according to claim 1, it is characterised in that the conductive carbon brush
(6), it is equipped with insulation sleeve outside the bolt and the mixing needle rotating seat (8).
3. it is a kind of to apply the method without keyhole agitating friction weldering slab as claimed in claim 1, it is characterised in that including as follows
Step：
S1, welding workpiece (3) is placed on the fixed base plate (1) it is provided with the position of conductive copper plate (2)；
S2, pumpback formula mixing needle (16) insert workpiece, and the shaft shoulder electric conductor (7) is contacted with the welding workpiece (3), lead to
Cross applying external power source, closure switch, the shaft shoulder electric conductor (7), the welding workpiece (3) and the conductive copper plate (2) with
The brush-system and external power source constitute loop, and enough heats are produced by electric Joule effect, improve the welding workpiece
(3) temperature, promotes the Plastic Flow of material；
S3, the raising with the welding workpiece (3) temperature, material softening increase material visco-plasticity, allow material fully to flow reality
Agitating friction weldering of the existing pumpback formula mixing needle (16) to the welding workpiece (3)；
S4, close to an end with welding, the mixing needle pumpback transmission system starts pumpback rising, start withdrawn position to complete
The distance of withdrawn position is 5-10 times of mixing needle pumpback amount, and after shaft shoulder end face leaves workpiece, concurrent heating system disconnects, final weldering
Seam surface is concordant, without keyhole.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710142251.7A CN106825908A (en) | 2017-03-10 | 2017-03-10 | A kind of device and method without keyhole agitating friction weldering slab |
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| CN201710142251.7A CN106825908A (en) | 2017-03-10 | 2017-03-10 | A kind of device and method without keyhole agitating friction weldering slab |
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| CN106825908A true CN106825908A (en) | 2017-06-13 |
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Cited By (5)
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| CN108890120A (en) * | 2018-09-20 | 2018-11-27 | 北京工业大学 | Based on controllable current distribution titanium alloy current-carrying dead axle shoulder Friction Stir Welding equipment |
| CN108971743A (en) * | 2018-10-16 | 2018-12-11 | 江苏科技大学 | A kind of long adaptive friction stir welding method of mixing needle needle that eliminating keyhole |
| CN113927149A (en) * | 2021-10-29 | 2022-01-14 | 黄山学院 | Friction stir welding method and device for high-melting-point metal plate |
| CN114054931A (en) * | 2021-11-22 | 2022-02-18 | 湖南坤鼎数控科技有限公司 | Stirring head for eliminating keyhole of friction stir welding |
| CN116833545A (en) * | 2023-09-01 | 2023-10-03 | 北京索德瀚智能科技有限公司 | Friction stir welding device and method for variable-depth tailless hole |
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| CN108890120A (en) * | 2018-09-20 | 2018-11-27 | 北京工业大学 | Based on controllable current distribution titanium alloy current-carrying dead axle shoulder Friction Stir Welding equipment |
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| CN113927149A (en) * | 2021-10-29 | 2022-01-14 | 黄山学院 | Friction stir welding method and device for high-melting-point metal plate |
| CN114054931A (en) * | 2021-11-22 | 2022-02-18 | 湖南坤鼎数控科技有限公司 | Stirring head for eliminating keyhole of friction stir welding |
| CN116833545A (en) * | 2023-09-01 | 2023-10-03 | 北京索德瀚智能科技有限公司 | Friction stir welding device and method for variable-depth tailless hole |
| CN116833545B (en) * | 2023-09-01 | 2023-11-10 | 北京索德瀚智能科技有限公司 | Friction stir welding device and method for variable-depth tailless hole |
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