CN107598357A - One kind is with weldering filled type without keyhole friction stir welding tool and method - Google Patents
One kind is with weldering filled type without keyhole friction stir welding tool and method Download PDFInfo
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- CN107598357A CN107598357A CN201710808056.3A CN201710808056A CN107598357A CN 107598357 A CN107598357 A CN 107598357A CN 201710808056 A CN201710808056 A CN 201710808056A CN 107598357 A CN107598357 A CN 107598357A
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- mixing needle
- depression bar
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- keyhole
- soldering appliance
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- 238000003466 welding Methods 0.000 title claims abstract description 88
- 238000000034 method Methods 0.000 title claims abstract description 39
- 238000003756 stirring Methods 0.000 title claims abstract description 21
- 238000002156 mixing Methods 0.000 claims abstract description 83
- 239000000463 material Substances 0.000 claims abstract description 63
- 238000005476 soldering Methods 0.000 claims abstract description 48
- 238000012856 packing Methods 0.000 claims abstract description 19
- 238000003801 milling Methods 0.000 claims abstract description 9
- 230000033001 locomotion Effects 0.000 claims description 12
- 238000003825 pressing Methods 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 230000007547 defect Effects 0.000 abstract description 14
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 6
- 230000008030 elimination Effects 0.000 abstract 1
- 238000003379 elimination reaction Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 239000012071 phase Substances 0.000 description 4
- 239000007790 solid phase Substances 0.000 description 4
- 238000010894 electron beam technology Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 241000208340 Araliaceae Species 0.000 description 1
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
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Abstract
One kind is with weldering filled type without keyhole friction stir welding tool and method, soldering appliance includes the shaft shoulder, the mixing needle being plugged in the central through hole of the shaft shoulder and the depression bar being plugged in the central through hole of mixing needle, the shaft shoulder, mixing needle and depression bar are revolving body, the central through hole diameter of the shaft shoulder is identical with the external diameter of mixing needle, the central through hole diameter of the mixing needle is identical with the diameter of depression bar, the bottom of the mixing needle offers screw thread, and offers at least one horizontal through hole in the horizontal direction.Welding method includes：1. adjust soldering appliance relative position；2. pre-install packing material；3. soldering appliance pushes；4. welded；5. keyhole is filled up；6. keyhole milling is put down.The simple and reliable for structure, easy to manufacture of the present invention, using effect are good, and production efficiency is high, can effectively realize being filled up with weldering elimination and the automatic of afterbody keyhole for agitating friction welding defect.
Description
Technical field
The present invention relates to agitating friction welding technique field, is specifically related to a kind of nothing that can be realized and be filled with wlding material
Keyhole friction stir welding tool and welding method.
Background technology
Agitating friction weldering is a kind of solid phase joining technique, has welding quality high, welding deformation is small, and non-environmental-pollution etc. is all
More advantages, particularly suitable for low-melting-point metals such as welding aluminum alloy, magnesium alloys.But the technology is applied to have two during actual production
Individual key technical problem is difficult to overcome：1. due to the limitation of actual condition, welded piece is loaded not strict, soldering appliance and technique
It is improper to select, and causes plastic material during welding to be not enough to fill up the temporary cavity that mixing needle is formed, so as to form surface grooves
Or inner void defect.2. in welding ending phase, the extraction of stirring-head can leave the keyhole of certain size in weld seam afterbody.
Two above problem will seriously reduce joint mechanical property, be unfavorable for friction stir welding carrying reliability.
In order to repair weld defect or weld seam afterbody keyhole, generally in postwelding using solid phase or the method for fusion welding to lacking
Fall into or keyhole is filled up again.For example, Application No. CN201610725054.3 Chinese invention patent application, discloses one
Kind postwelding use with the strong method filled up the method for chock plug and filled up to keyhole such as materials to be welded, but this method need it is extra
Independent fills up process and special chock plug.Patent No. CN201410679611.3 Chinese invention patent, propose that postwelding exists
Defective locations carry out solid phase to defect using friction stopper and filled up, but this method process and device structure are complicated, and cost is higher.Shen
Number agitating friction weldering please be produced using the method for electron beam welding by CN201610624939.4 Chinese invention patent application
The defects of raw, carries out repair welding, but this method belongs to fusing soldering method, different from the Solid-phase welding tissue that agitating friction weldering is formed, right
Joint mechanical property is unfavorable, and electron beam welding needs to weld under vacuum conditions in addition, which has limited the size of welded piece, together
When be added to production cost.It can be seen that above method is intended to carry out secondary place to weld defect or keyhole using special equipment in postwelding
Reason, adds production process and cost, reduces production efficiency.
The content of the invention
It is an object of the invention to problem and shortage be present for above-mentioned, there is provided and a kind of production efficiency is high, and using effect is good,
Effectively can eliminate and avoid weld defect generation and and weld seam afterbody keyhole is continuously filled agitating friction welding
Instrument and welding method.
The technical proposal of the invention is realized in this way：
It is of the present invention with weldering filled type without keyhole friction stir welding tool, be characterized in：Including the shaft shoulder, it is plugged on the shaft shoulder
Central through hole in mixing needle and the depression bar that is plugged in the central through hole of mixing needle, the shaft shoulder, mixing needle and depression bar are equal
For revolving body, wherein the central through hole diameter of the shaft shoulder is identical with the external diameter of mixing needle, the central through hole of the mixing needle is straight
Footpath is identical with the diameter of depression bar, and the bottom of the mixing needle offers screw thread, and offers at least one water in the horizontal direction
Flat through hole, the shaft shoulder, mixing needle and depression bar are connected respectively with welding machine and realization rotation and movement under the driving of welding machine.
In order that the present invention has optimal using effect, the horizontal through hole is only provided with one.
It is of the present invention with weldering filled type without keyhole friction stir welding method, be characterized in comprising the following steps：
Step 1: adjustment soldering appliance relative position：Same level is arrived into the regulation of the lower surface of the shaft shoulder and mixing needle, according to quilt
The thickness T of welding plate material, the position of depression bar is adjusted, the lower surface of depression bar and the central through hole of mixing needle is formed the sky that height is H
Chamber, H >=(D1 2-D2 2)T/D2 2；
Step 2: prepackage packing material：Inserted in the cavity that the central through hole of mixing needle is formed with depression bar and by welding plate material phase
It is H bar-shaped packing material with material and height, the central through hole of bar-shaped packing material and mixing needle is in connection is interference fitted, together
When bar-shaped packing material upper surface and depression bar lower surface be in close contact；
Step 3: soldering appliance pushes：Soldering appliance is moved to by the top of welding plate material, makes soldering appliance axis and by welding plate material
Interface be in same plane；Start welding machine, make the shaft shoulder, mixing needle and depression bar respectively with ω1、ω2And ω3Rotating speed start
Rotation, while soldering appliance is overall with V1Speed push；When the lower surface of the shaft shoulder is pressed into by 0 ~ 0.5mm of upper surface of welding plate material
Depth after, the shaft shoulder stop move downward, now mixing needle is with V2Speed under prick, while depression bar is with V3The upward pumpback of speed,
V2/V3≥D2 2/(D1 2-D2 2)；When it be L to prick distance under mixing needle, mixing needle and depression bar stop vertical direction and moved, according to being welded
The thickness T of sheet material, determine lower bundle distance L=0.95T~0.99T of mixing needle；
Step 4: welded：Soldering appliance rotation is kept, the overall edge of soldering appliance is by the interface of welding plate material with V4Speed
Motion, while depression bar is with V5Speed rotating down pressing, V5/V4=0.001~0.1；
Step 5: keyhole is filled up：When soldering appliance reach welding terminating point when, keep soldering appliance rotation, now mixing needle with
V6The upward pumpback of speed, while depression bar is with V7Speed push, and meet V6/V7≤D2 2/(D1 2-D2 2)；When mixing needle pumpback
When being in same plane to its lower surface and shaft shoulder lower surface, the motion of mixing needle and depression bar stopping vertical direction；
Step 6: keyhole milling is put down：Soldering appliance rotation is kept, at the same it is overall with V8Speed along by the interface direction of welding plate material
Motion, until after keyhole initial position is crossed in the overall milling of the shaft shoulder, soldering appliance integrally moves upwardly off weld seam, and welding is completed.
Further, in above-mentioned steps one, H=2 (D1 2-D2 2)T/D2 2。
Further, in above-mentioned steps three, the rotation direction of the shaft shoulder, mixing needle and depression bar is identical, and ω1=ω2=ω3。
Further, in above-mentioned steps three, when the lower surface of the shaft shoulder is pressed into by the upper surface 0.2mm of welding plate material depth
Afterwards, the shaft shoulder stops moving downward.
Further, in above-mentioned steps three, V2/V3=1.1D2 2/(D1 2-D2 2)。
Further, in above-mentioned steps three, lower bundle distance L=0.98T of mixing needle.
Further, in above-mentioned steps four, V5/V4=0.01。
Further, in above-mentioned steps five, V6/V7=0.9D2 2/(D1 2-D2 2)。
The present invention compared with prior art, has following remarkable advantage：
1st, the present invention connects the packing material in mixing needle central through hole with weldering by the way of depression bar pushes in welding process
It is continuous insert weld seam mix region, to make up the deficiency of weld material, effectively avoid weld defect or weld defect realized with weldering
Fill up, welding procedure section can be widened, reduce to by the requirement that is loaded of welding plate material, raising welding efficiency；
2nd, packing material is pre-installed in mixing needle central through hole before present invention weldering, it is ensured that there are enough materials to make up welding process
Material caused by middle plastic material overflows loses；
3rd, the present invention devises horizontal through hole in stirring needle end part, can preferably realize being filled out with weldering to weld seam middle and upper part defect
Mend, while the design of the vertical central through hole of mixing needle, being filled up with weldering to weld seam bottom defect can be preferably realized, so as to realize
To the comprehensive filling of weld defect；
4th, the present invention does not need additional process, the control in welding process excessively to combined welding instrument relative position, can
Continuous filling to defect and keyhole is realized, and keyhole milling can be carried out automatically and put down, fills up that effect is good, and production efficiency is high；
5th, the central through hole design of mixing needle of the present invention can significantly reduce mixing needle and penetrate the pressure born during by welding plate material, drop
Low mixing needle abrasion, increases its service life；
6th, the shaft shoulder and mixing needle are used split-type design by the present invention, and the synchronized of the two, differential and counter-rotating can be achieved, so as to
Realizing reduces welding load, improves joint microstructure and performance.
The present invention is further illustrated below in conjunction with the accompanying drawings.
Brief description of the drawings
Fig. 1 is the overall structure diagram of soldering appliance of the present invention.
Fig. 2 is the profile of soldering appliance of the present invention.
Fig. 3 is that soldering appliance integrally pushes process schematic in soldering appliance depression phases of the present invention.
Fig. 4 is to prick process schematic under mixing needle in soldering appliance depression phases of the present invention.
Fig. 5 is the schematic diagram that soldering appliance of the present invention carries out the welding stage.
Fig. 6 is that soldering appliance of the present invention progress keyhole fills up stage schematic diagram.
Fig. 7 is that soldering appliance of the present invention carries out the flat stage schematic diagram of keyhole milling.
Embodiment
As Figure 1-Figure 2, it is of the present invention with weldering filled type without keyhole friction stir welding tool, including the shaft shoulder 1,
The mixing needle 2 being plugged in the central through hole 6 of the shaft shoulder 1 and the depression bar 3 being plugged in the central through hole 4 of mixing needle 2, the shaft shoulder
1st, mixing needle 2 and depression bar 3 are revolving body, wherein the diameter of central through hole 6 of the shaft shoulder 1 is identical with the external diameter of mixing needle 2, institute
State that the diameter of central through hole 4 of mixing needle 2 is identical with the diameter of depression bar 3, the bottom of the mixing needle 2 offers screw thread 9, and edge
Horizontal direction offers at least one horizontal through hole 5, and the shaft shoulder 1, mixing needle 2 and depression bar 3 are connected and welded with welding machine respectively
Rotation and movement are realized under the driving of machine.In order that the present invention has optimal using effect, in the present embodiment, the water
Flat through hole 5 is only provided with one.It is of course also possible to according to the use needs of reality, two or more horizontal through hole 5 are set.
The method welded using the soldering appliance of said structure, is comprised the following steps：
Step 1: adjustment soldering appliance relative position：Same level is arrived into the regulation of the lower surface of the shaft shoulder 1 and mixing needle 2, according to
By the thickness T of welding plate material 8, the position of depression bar 3 is adjusted, the lower surface of depression bar 3 is formed height with the central through hole 4 of mixing needle 2
For H cavity, H >=(D1 2-D2 2)T/D2 2, as shown in figure 3, wherein D1For the external diameter of mixing needle 2, D2For the diameter of depression bar 3；
Step 2: prepackage packing material：Inserted and by welding plate material in the cavity that the central through hole 4 of mixing needle 2 is formed with depression bar 3
The central through hole 4 of the bar-shaped packing material 7 that 8 identical materials and height are H, bar-shaped packing material 7 and mixing needle 2 is in interference fit
Connection, while the upper surface of bar-shaped packing material 7 and the lower surface of depression bar 3 are in close contact, as shown in Figure 3；
Step 3: soldering appliance pushes：Soldering appliance is moved to by the top of welding plate material 8, makes soldering appliance axis and by welding plate
The interface of material 8 is in same plane；Start welding machine, make the shaft shoulder 1, mixing needle 2 and depression bar 3 respectively with ω1、ω2And ω3Turn
Speed starts to rotate, while soldering appliance is overall with V1Speed push；When the lower surface of the shaft shoulder 1 is pressed into by the upper table of welding plate material 8
After 0 ~ 0.5mm of face depth, the shaft shoulder 1 stops moving downward, and now mixing needle 2 is with V2Speed under prick, while depression bar 3 is with V3's
The upward pumpback of speed, V2/V3≥D2 2/(D1 2-D2 2)；When 2 times bundle distances of mixing needle are L, mixing needle 2 and depression bar 3 stop vertically
Direction is moved, according to the lower bundle distance L=0.95T~0.99T for by the thickness T of welding plate material 8, determining mixing needle 2, as shown in Figure 4；
Step 4: welded：Soldering appliance rotation is kept, the overall edge of soldering appliance is by the interface of welding plate material 8 with V4Speed
Degree motion, while depression bar 3 is with V5Speed rotating down pressing, V5/V4=0.001~0.1, as shown in Figure 5；
Step 5: keyhole is filled up：When soldering appliance reach welding terminating point when, keep soldering appliance rotation, now mixing needle 2 with
V6The upward pumpback of speed, while depression bar 3 is with V7Speed push, and meet V6/V7≤D2 2/(D1 2-D2 2)；When mixing needle 2 returns
When being evacuated to its lower surface and the lower surface of the shaft shoulder 1 and be in same plane, mixing needle 2 and depression bar 3 stop the motion of vertical direction, such as figure
Shown in 6；
Step 6: keyhole milling is put down：Soldering appliance rotation is kept, at the same it is overall with V8Speed along by the interface side of welding plate material 8
To motion, until after keyhole initial position is crossed in the overall milling of the shaft shoulder 1, soldering appliance integrally moves upwardly off weld seam, has welded
Into as shown in Figure 7.
In order that the present invention has optimal using effect, in the present embodiment, can be by the ginseng in above-mentioned welding method
Number carries out arranged below.
In above-mentioned steps one, H=2 (D1 2-D2 2)T/D2 2.It is so designed that, it is ensured that the cavity that mixing needle 2 is formed with depression bar 3
Enough packing materials can be accommodated to carry out filling up for weld defect and weld seam tail end keyhole, while the axle of mixing needle 2 can be made again
It is unlikely excessive to size, and then stability when increasing its welding.
In above-mentioned steps three, the rotation direction of the shaft shoulder 1, mixing needle 2 and depression bar 3 is identical, and ω1=ω2=ω3.It is so designed that,
The mobility of weld material can be strengthened, the requirement of butt welding machine can be reduced again.
It is the shaft shoulder after lower surface of the shaft shoulder 1 is pressed into the depth by the upper surface 0.2mm of welding plate material 8 in above-mentioned steps three
Stopping moves downward.It is so designed that, it is ensured that shaft shoulder Resistance of Weld Metal applies enough forging forces, to ensure appearance of weld.
In above-mentioned steps three, V2/V3=1.1D2 2/(D1 2-D2 2).It is so designed that, it is ensured that be stirred pin 2 and squeeze into mixing needle
Certain pressure is formed between the plastic material and preset packing material of 2 central through hole 4 and is in close contact, is contributed to preset
Packing material plastifies.
In above-mentioned steps three, according to the lower bundle distance L=0.98T for by the thickness T of welding plate material 8, determining mixing needle 2.So set
Meter, can protect will be penetrated by welding plate material 8, and mixing needle 2 will not again will be penetrated by welding plate material 8.
In above-mentioned steps five, V6/V7=0.9D2 2/(D1 2-D2 2).It is so designed that, it is ensured that in the central through hole 4 of mixing needle 2
Packing material by depression bar 3 with caused by enough pressure press-in pumpbacks of mixing needle 2 in temporary cavity so that being padded
Keyhole has fine and close tissue.
The present invention is described by embodiment, but is not limited the invention, with reference to description of the invention, institute
Other changes of disclosed embodiment, are such as readily apparent that, such change should belong to for the professional person of this area
Within the scope of the claims in the present invention limit.
Claims (10)
1. one kind is with weldering filled type without keyhole friction stir welding tool, it is characterised in that：Including the shaft shoulder（1）, be plugged on the shaft shoulder
（1）Central through hole（6）Interior mixing needle（2）And it is plugged on mixing needle（2）Central through hole（4）Interior depression bar（3）, the axle
Shoulder（1）, mixing needle（2）And depression bar（3）It is revolving body, wherein the shaft shoulder（1）Central through hole（6）Diameter and mixing needle
（2）External diameter it is identical, the mixing needle（2）Central through hole（4）Diameter and depression bar（3）Diameter it is identical, the mixing needle（2）
Bottom offer screw thread（9）, and at least one horizontal through hole is offered in the horizontal direction（5）, the shaft shoulder（1）, stirring
Pin（2）And depression bar（3）It is connected respectively with welding machine and rotation is realized under the driving of welding machine and is moved.
2. it is according to claim 1 with weldering filled type without keyhole friction stir welding tool, it is characterised in that：The level
Through hole（5）Only it is provided with one.
3. a kind of utilize as described in above-mentioned any claim with weldering filled type without keyhole friction stir welding method, this method
Soldering appliance, it is characterised in that comprise the following steps：
Step 1: adjustment soldering appliance relative position：By the shaft shoulder（1）And mixing needle（2）Lower surface regulation arrive same level,
According to by welding plate material（8）Thickness T, adjust depression bar（3）Position, make depression bar（3）Lower surface and mixing needle（2）Center lead to
Hole（4）Form the cavity that height is H, H >=(D1 2-D2 2)T/D2 2；
Step 2: prepackage packing material：In mixing needle（2）Central through hole（4）With depression bar（3）Inserted in the cavity of formation and quilt
Welding plate material（8）The bar-shaped packing material that identical material and height are H（7）, bar-shaped packing material（7）With mixing needle（2）Center
Through hole（4）Connected in interference fit, while bar-shaped packing material（7）Upper surface and depression bar（3）Lower surface be in close contact；
Step 3: soldering appliance pushes：Soldering appliance is moved to by welding plate material（8）Top, make soldering appliance axis with being welded
Sheet material（8）Interface be in same plane；Start welding machine, make the shaft shoulder（1）, mixing needle（2）And depression bar（3）Respectively with ω1、ω2
And ω3Rotating speed start to rotate, while soldering appliance is overall with V1Speed push；Work as the shaft shoulder（1）Lower surface be pressed into by welding plate
Material（8）0 ~ 0.5mm of upper surface depth after, the shaft shoulder（1）Stopping moves downward, now mixing needle（2）With V2Speed under prick,
Depression bar simultaneously（3）With V3The upward pumpback of speed, V2/V3≥D2 2/(D1 2-D2 2)；Work as mixing needle（2）When lower bundle distance is L, stirring
Pin（2）And depression bar（3）Stop vertical direction motion, according to by welding plate material（8）Thickness T, determine mixing needle（2）Lower bundle distance
L=0.95T~0.99T；
Step 4: welded：Soldering appliance rotation is kept, the overall edge of soldering appliance is by welding plate material（8）Interface with V4Speed
Degree motion, while depression bar（3）With V5Speed rotating down pressing, V5/V4=0.001~0.1；
Step 5: keyhole is filled up：When soldering appliance reaches welding terminating point, soldering appliance rotation is kept, now mixing needle（2）
With V6The upward pumpback of speed, while depression bar（3）With V7Speed push, and meet V6/V7≤D2 2/(D1 2-D2 2)；Work as mixing needle
（2）Pumpback is to its lower surface and the shaft shoulder（1）When lower surface is in same plane, mixing needle（2）And depression bar（3）Stop vertical direction
Motion；
Step 6: keyhole milling is put down：Soldering appliance rotation is kept, at the same it is overall with V8Speed along by welding plate material（8）Interface side
To motion, until the shaft shoulder（1）Overall milling cross keyhole initial position after, soldering appliance integrally moves upwardly off weld seam, welding
Complete.
4. it is according to claim 3 with weldering filled type without keyhole friction stir welding method, it is characterised in that：Above-mentioned steps
In one, H=2 (D1 2-D2 2)T/D2 2。
5. it is according to claim 3 with weldering filled type without keyhole friction stir welding method, it is characterised in that：Above-mentioned steps
In three, the shaft shoulder（1）, mixing needle（2）And depression bar（3）Rotation direction it is identical, and ω1=ω2=ω3。
6. it is according to claim 3 with weldering filled type without keyhole friction stir welding method, it is characterised in that：Above-mentioned steps
In three, work as the shaft shoulder（1）Lower surface be pressed into by welding plate material（8）Upper surface 0.2mm depth after, the shaft shoulder（1）Stop fortune downwards
It is dynamic.
7. it is according to claim 3 with weldering filled type without keyhole friction stir welding method, it is characterised in that：Above-mentioned steps
In three, V2/V3=1.1D2 2/(D1 2-D2 2)。
8. it is according to claim 3 with weldering filled type without keyhole friction stir welding method, it is characterised in that：Above-mentioned steps
In three, mixing needle（2）Lower bundle distance L=0.98T.
9. it is according to claim 3 with weldering filled type without keyhole friction stir welding method, it is characterised in that：Above-mentioned steps
In four, V5/V4=0.01。
10. it is according to claim 3 with weldering filled type without keyhole friction stir welding method, it is characterised in that：Above-mentioned step
In rapid five, V6/V7=0.9D2 2/(D1 2-D2 2)。
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| CN201710808056.3A CN107598357B (en) | 2017-09-08 | 2017-09-08 | One kind is with weldering filled type without keyhole friction stir welding method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109048044A (en) * | 2018-10-16 | 2018-12-21 | 江苏科技大学 | A kind of stirring-head for eliminating friction stir welding keyhole |
| CN112108754A (en) * | 2020-08-06 | 2020-12-22 | 山东碳垣纳米科技有限公司 | Stirring head, spot welder head and pumpback spot welding equipment |
| CN112548313A (en) * | 2020-12-01 | 2021-03-26 | 昆山万洲特种焊接有限公司 | Welding tool and method for processing internal flow channel by using friction stir processing technology |
| WO2022049113A1 (en) * | 2020-09-01 | 2022-03-10 | Element Six (Uk) Limited | Friction stir welding tool insert |
| CN114222640A (en) * | 2021-11-04 | 2022-03-22 | 黄山学院 | Special stirring head for friction stir connection without key hole for aluminum alloy plate |
| EP3765221A4 (en) * | 2018-03-12 | 2022-04-06 | Meld Manufacturing Corporation | Method for process control of a solid-state additive manufacturing system |
| CN114850652A (en) * | 2022-06-17 | 2022-08-05 | 广东省科学院中乌焊接研究所 | Friction material increase device and friction material increase method |
| CN115091025A (en) * | 2022-07-28 | 2022-09-23 | 中国科学院金属研究所 | Differential friction extrusion deposition solid additive manufacturing machine head and solid manufacturing device |
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Address after: 510000 363 Changxin Road, Tianhe District, Guangzhou, Guangdong. Patentee after: China Uzbekistan Welding Research Institute Guangdong Academy of Sciences Address before: 510651 No. 363, Changxin Road, Guangzhou, Guangdong, Tianhe District Patentee before: Guangdong Welding Institute (China-Ukraine E.O. Paton Institute of Welding) |