CN108637505A - A kind of asymmetric argon tungsten-arc welding preheating-stirring friction composition welding method - Google Patents
A kind of asymmetric argon tungsten-arc welding preheating-stirring friction composition welding method Download PDFInfo
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- CN108637505A CN108637505A CN201810484719.5A CN201810484719A CN108637505A CN 108637505 A CN108637505 A CN 108637505A CN 201810484719 A CN201810484719 A CN 201810484719A CN 108637505 A CN108637505 A CN 108637505A
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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
- B23K28/00—Welding or cutting not covered by any of the preceding groups, e.g. electrolytic welding
- B23K28/02—Combined welding or cutting procedures or apparatus
Abstract
The present invention relates to a kind of asymmetric preheating argon tungsten-arc welding stirring friction composition welding methods, in face of weld tungsten electrode argon arc welding gun and agitating friction weldering mixing needle are sequentially placed along welding direction, mixing needle axle center is located at Weld pipe mill, welding gun is fixed on the slide bar locator being connected with mixing needle clamping device, keeps the two speed of welding identical.Welding gun tungsten electrode axle center is vertical welding direction is at a distance from Weld pipe mill and welding gun is adjusted with base material plane included angle by slide bar locator.Argon tungsten-arc welding preheats, and mixing needle is stirred friction welding (FW) welding in the case where base material is through electric arc heat treatment condition with certain parameter.Argon tungsten-arc welding offset is preheated in weld seam side, it can avoid crackle, stomata, the generation for the defects of being mingled with when traditional metal materials welding, and the problem that tradition agitating friction weldering mixing needle service life due to abrasion is low, the difference for more solving traditional agitating friction weldering advanced side, retreating side microstructure and performance, effectively improves the mechanical property of stir friction welding seam.
Description
Technical field
The invention belongs to metal parts to form field.More particularly to a kind of asymmetric argon tungsten-arc welding preheating-stirring
Friction composite welding method.
Background technology
Agitating friction weldering (friction stir welding, FSW) is a kind of novel solid phase joining technique, has height
Effect, environmental protection, thermal deformation and the overall merits such as residual stress is small, especially have in terms of aluminium alloy is connected with alloy in lightweight such as magnesium alloys
It and is widely applied, but in the welding process, due to advanced side and retreat side metal flow direction and mixing needle direction of rotation not
It is different with heat production mechanism is resulted in, keep weld seam both sides Temperature Distribution different, is had differences so as to cause weld seam both sides microstructure,
Weld seam advanced side, the mechanical property distribution for retreating side is uneven and advanced side nugget area and heat and zone of influence junction intensity are minimum
The case where.
Invention content
The present invention provides a kind of asymmetric argon tungsten-arc welding for deficiency present in above-mentioned agitating friction weldering welding process
Preheating-stirring friction composition welding method.
A kind of asymmetric argon tungsten-arc welding preheating-stirring friction composition welding method, tungsten electrode is sequentially placed along welding direction
Argon arc welding gun and agitating friction weldering mixing needle, mixing needle axle center be located at Weld pipe mill, and welding gun is fixed on to be connected with mixing needle
Make the two speed of welding identical on slide bar locator, the tungsten electrode axle center of welding gun keeps default in vertical welding direction and Weld pipe mill
Distance, the tungsten electrode axle center of welding gun vertical welding direction at a distance from Weld pipe mill and welding gun and the angle of plane where base material it is equal
It is adjusted by slide bar locator, argon tungsten-arc welding is preheated or welded first, is subsequently agitated for needle and be have passed through electricity in base material
It is welded under conditions of arc heat treatment, and friction welding (FW) welding is stirred with scheduled rotating speed, weldering speed and lower pressure.
Tungsten electrode argon-arc welding electric arc offset is preheated in the side of Weld pipe mill, is opened and is welded when traditional metal materials being avoided to weld
Crackle, stomata, the generation for the defects of being mingled with are connect, also solving mixing needle service life due to abrasion in traditional agitating friction weldering low asks
Topic, more solve traditional stir friction welding seam advanced side, retrogressing side leads to weld seam both sides temperature field since heat production mechanism is different
The problem of being unevenly distributed has the microstructure of different, performance closer, effectively to make weld seam advanced side, retreat side
Improve the mechanical property of stir friction welding seam.
A kind of asymmetric argon tungsten-arc welding preheating-stirring friction composition welding method, includes the following steps：
One, the base material of welding pretreatment is fixed on clamp system；
Two, following technological parameter is determined according to quality of parent material and thickness：Tig Welding/pre- thermocurrent, welding gun angle
Degree, tungsten electrode argon arc welding gun are at a distance from mixing needle is in welding direction and vertical welding direction, tungsten electrode diameter, tungsten electrode stretch out length
Degree, tungsten electrode are away from base material height, shield gas flow rate；Mixing needle inclination angle, mixing needle rotary speed, mixing needle volume under pressure；It is compound
Speed of welding；
Three, tungsten electrode argon arc welding gun first is in advanced side base material upper surface striking welding/preheating of end of welding bead, tungsten electrode argon
Arc-welding welding gun and agitating friction weldering mixing needle are synchronized and are travelled forward, when needle to be mixed reaches end of welding bead, agitating friction weldering stirring
Needle is rotated and is inserted into docking base material, when the shaft shoulder is contacted with base material surface and is welded after rotation set time；Material combines
The metal at interface is in hot plastic state under tungsten electrode arc heat and mixing needle frictional heat collective effect, and in mixing needle rotation
It under driving, is posteriorly flowed from its front end, plasticized joining is formed under stirring needle force effect；
Four, when tungsten electrode argon arc welding gun and mixing needle arrive separately at weld seam end, tungsten electrode argon arc welding gun breath arc lifts,
Mixing needle is extracted out, and welding process is completed.
Preferably, the tungsten electrode argon arc welding gun and mixing needle, the distance in welding direction carries out for 10-25mm
It adjusts, the distance on vertical welding direction is that ± 20mm is adjusted.
Preferably, during composite welding, when the pre- thermal migration of tungsten electrode argon-arc welding electric arc in advanced side or retreats side,
The Temperature Distribution that weld seam both sides can be achieved is essentially identical, before solution advanced side leads to weld seam with retrogressing side since temperature is unbalanced
The problem of being had differences into side with retrogressing side microstructure, the mechanical property of advanced side is improved with this
Compared with existing friction stir welding method, the asymmetric argon tungsten-arc welding preheating-agitating friction Combined Welding of the present invention
Connecing method has following features：In the advanced side of stir friction welding seam or side is retreated using tungsten argon arc welding gun offset.Electric arc
By the compound of electric arc heat source and agitating friction heat source, make advanced side and to retreat side thermo parameters method essentially identical, solve to advance
It the problem of side and retrogressing side cause weld seam advanced side to be had differences with retrogressing side microstructure since temperature is unbalanced, is carried with this
The mechanical property of high advanced side, the especially performance in the heat engine zone of influence and heat affected area junction.No matter argon tungsten-arc welding is preheated
Positioned at the advanced side of weld seam or side is retreated, Weld Performance increases, and then when electric arc is located at advanced side, Weld Performance carries
Height becomes apparent from.
Description of the drawings
Fig. 1 is the schematic diagram of asymmetric argon tungsten-arc welding preheating-stirring friction composition welding method.
In figure：1- mixing needles, 2- base materials, 3- argon tungsten-arc welding power supplys, 4- tungsten electrode argon arc welding guns, 5- argon tungsten-arc welding electricity
Arc, 6- slide bar locators, 7- preheating positions.
Specific implementation mode
The present embodiment use equipment include：Mixing needle 1, argon tungsten-arc welding power supply 3, tungsten electrode argon arc welding gun 4, slide bar is fixed
Position device 6.Mixing needle 1 is HM3Alloy and mixing needle length are 5.7mm's；3 output amplitude of argon tungsten-arc welding power supply is 20-300A
AC or DC electric current；Tungsten electrode used in welding gun 4 is a diameter of 2.8mm；Slide bar locator 6, which has, adjusts welding gun 4 and mixing needle 1
In the function and angle of welding gun of welding direction and vertical direction distance；Base material 2 is the 2219-T87 aluminum alloy plate materials of 6mm thickness.
Specific asymmetric argon tungsten-arc welding preheating-stirring friction composition welding method includes the following steps：
One, the good base material 2 of welding pretreatment is fixed on clamp system；
Two, following technological parameter is determined according to the 2219-T87 aluminium alloys base material 2 of 6mm thickness：Welding current be exchange 80A,
The angle of welding gun 4 and 2 place plane of base material is 45 °, tungsten electrode argon arc welding gun 4 and mixing needle 1 welding direction distance be 20mm,
Preheating position 7 is the arc offset on vertical welding direction in weld seam advanced side 4mm；1 ° 58 ' of 1 inclination angle of mixing needle, mixing needle 1
Rotary speed 800rpm, mixing needle compression distance are 5.8mm；Speed of welding is 160mm/min.
Three, tungsten electrode argon arc welding gun 4 is determined in the 2 surface striking welding of advanced side base material of end of welding bead by slide bar first
Position device connection makes mixing needle 1 synchronize therewith to move forwards, and when needle 1 to be mixed reaches weld seam initial position, the rotation of mixing needle 1 penetrates
2 faying face of base material of docking when the shaft shoulder of mixing needle 1 is contacted with base material 2, and rotates after a certain period of time, is stirred friction
Weldering welding, 2 metal of base material of combination interface is under the collective effect of 1 frictional heat of arc heat and mixing needle of tungsten electrode arc 5 at this time
In hot plastic state, and under the using of mixing needle 1, from the front end of base material 2 posteriorly Plastic Flow, under mixing needle 1
Plasticized joining is formed under pressure effect；
Four, when tungsten electrode argon arc welding gun 4 and mixing needle 1 arrive separately at weld seam end, tungsten electrode argon arc welding gun 4 ceases arc,
Mixing needle 1 is extracted out, and welding is completed.
Five, postmenstruation experimental verification, when tungsten electrode argon arc welding gun 4 preheating at the 4mm of weld seam advanced side, weld seam tensile strength
Tensile strength than preheating in Weld pipe mill position improves 6%, and the agitating friction weldering tensile strength than without preheating improves closely
11%.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that
The specific implementation of the present invention is confined to these explanations.For those of ordinary skill in the art to which the present invention belongs, exist
Under the premise of not departing from present inventive concept, architectural form cans be flexible and changeable, can be with derivative series product.It only makes several
Simple deduction or replace are regarded as belonging to present invention scope of patent protection determined by the appended claims.
Claims (4)
1. a kind of asymmetric argon tungsten-arc welding preheating-stirring friction composition welding method, it is characterised in that：Successively along welding direction
It places tungsten electrode argon arc welding gun and agitating friction weldering mixing needle, mixing needle axle center is located at Weld pipe mill, welding gun is fixed on and stirs
Make the two speed of welding identical on the connected slide bar locator of needle, the tungsten electrode axle center of welding gun is in vertical welding direction and Weld pipe mill
Keep pre-determined distance, the tungsten electrode axle center of welding gun is in vertical welding direction at a distance from Weld pipe mill and welding gun and plane where base material
Angle be adjusted by slide bar locator, argon tungsten-arc welding is preheated or is welded first, is subsequently agitated for needle in base material
It has passed through under conditions of electric arc is heat-treated and welded, and friction welding (FW) weldering is stirred with scheduled rotating speed, weldering speed and lower pressure
It connects.
2. asymmetric argon tungsten-arc welding preheating-stirring friction composition welding method according to claim 1, feature exist
In comprising the following specific steps that：
One, the base material of welding pretreatment is fixed on clamp system；
Two, following technological parameter is determined according to quality of parent material and thickness：Tig Welding or pre- thermocurrent, angle of welding gun,
Tungsten electrode argon arc welding gun at a distance from mixing needle is in welding direction and vertical welding direction, tungsten electrode diameter, tungsten electrode extension elongation,
Tungsten electrode is away from base material height, shield gas flow rate；Mixing needle inclination angle, mixing needle rotary speed, mixing needle volume under pressure；Composite welding
Speed；
Three, tungsten electrode argon arc welding gun is preheated or is welded in the advanced side base material upper surface starting the arc of weld seam starting ends first,
Tungsten electrode argon arc welding gun and the synchronous operation of agitating friction weldering mixing needle, when needle to be mixed reaches end of welding bead, agitating friction weldering is stirred
It mixes needle to rotate and be pressed into docking base material, be welded after a certain period of time when the shaft shoulder is contacted and rotated with base material surface.Material knot
The metal for closing interface is in hot plastic state under tungsten electrode arc heat and mixing needle frictional heat collective effect, and is rotated in mixing needle
Under the action of, it is posteriorly flowed from mixing needle front end, plasticized joining is formed under stirring needle force effect；
Four, when tungsten electrode argon arc welding gun and mixing needle arrive separately at weld seam end, tungsten electrode argon arc welding gun breath arc lifts, and stirs
Needle is extracted out, and welding process is completed.
3. tungsten pole inert gas protection electric arc welding preheating-stirring friction composition welding method according to claim 1 and 2,
It is characterized in that, the tungsten electrode argon arc welding gun and mixing needle, the distance in welding direction are adjusted for 10-25mm,
Distance on vertical welding direction is that ± 20mm is adjusted.
4. asymmetric argon tungsten-arc welding preheating-stirring friction composition welding method according to claim 3, which is characterized in that
During composite welding, when tungsten electrode argon-arc welding electric arc pre- thermal migration in advanced side or retreats side, weld seam both sides can be achieved
Temperature Distribution is essentially identical.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110722278A (en) * | 2019-10-12 | 2020-01-24 | 广东省焊接技术研究所（广东省中乌研究院） | Electric arc welding and friction stir welding composite welding system |
| CN111136377A (en) * | 2020-01-15 | 2020-05-12 | 重庆科技学院 | Multi-needle friction welding stirring head |
| CN111151904A (en) * | 2020-02-11 | 2020-05-15 | 重庆理工大学 | Dissimilar metal arc melting-brazing method based on gnawing cutting assistance |
| CN112355462A (en) * | 2020-09-25 | 2021-02-12 | 广州瑞松智能科技股份有限公司 | Aluminum alloy welding temperature field prediction method based on ANSYS |
| CN112475647A (en) * | 2020-08-07 | 2021-03-12 | 兰州理工大学 | Assembly line method for welding thick metal plate by electric arc welding and friction stir welding |
| CN115091022A (en) * | 2022-07-06 | 2022-09-23 | 重庆理工大学 | Friction stir welding-based crack repairing and micro-additive method |
| CN115502593A (en) * | 2022-10-07 | 2022-12-23 | 哈尔滨工程大学 | Welding method for titanium alloy arc welding assisted by friction stir |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110722278A (en) * | 2019-10-12 | 2020-01-24 | 广东省焊接技术研究所（广东省中乌研究院） | Electric arc welding and friction stir welding composite welding system |
| CN111136377A (en) * | 2020-01-15 | 2020-05-12 | 重庆科技学院 | Multi-needle friction welding stirring head |
| CN111151904A (en) * | 2020-02-11 | 2020-05-15 | 重庆理工大学 | Dissimilar metal arc melting-brazing method based on gnawing cutting assistance |
| CN111151904B (en) * | 2020-02-11 | 2021-07-23 | 重庆理工大学 | Dissimilar metal arc melting-brazing method based on gnawing cutting assistance |
| CN112475647A (en) * | 2020-08-07 | 2021-03-12 | 兰州理工大学 | Assembly line method for welding thick metal plate by electric arc welding and friction stir welding |
| CN112475647B (en) * | 2020-08-07 | 2021-12-17 | 兰州理工大学 | Assembly line method for welding thick metal plate by electric arc welding and friction stir welding |
| CN112355462A (en) * | 2020-09-25 | 2021-02-12 | 广州瑞松智能科技股份有限公司 | Aluminum alloy welding temperature field prediction method based on ANSYS |
| CN115091022A (en) * | 2022-07-06 | 2022-09-23 | 重庆理工大学 | Friction stir welding-based crack repairing and micro-additive method |
| CN115091022B (en) * | 2022-07-06 | 2023-12-05 | 重庆理工大学 | Crack repairing and micro-additive method based on friction stir welding |
| CN115502593A (en) * | 2022-10-07 | 2022-12-23 | 哈尔滨工程大学 | Welding method for titanium alloy arc welding assisted by friction stir |
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