CN108453351A - A kind of Al pipe butt welding method - Google Patents
A kind of Al pipe butt welding method Download PDFInfo
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- CN108453351A CN108453351A CN201810159106.4A CN201810159106A CN108453351A CN 108453351 A CN108453351 A CN 108453351A CN 201810159106 A CN201810159106 A CN 201810159106A CN 108453351 A CN108453351 A CN 108453351A
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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
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/167—Arc welding or cutting making use of shielding gas and of a non-consumable electrode
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- Arc Welding In General (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
A kind of Al pipe butt welding method, is used for the gapless welding between the aluminum pipe with groove, and welding process includes the following steps：Prime coat welds, and circumferencial direction while welding gun is swung laterally between groove both sides with "the" shape along aluminum pipe in groove moves, to form prime coat；Then capping layer welds, using high-frequency arc strike method and decaying breath arc method, circumferencial direction while welding gun is swung laterally between groove both sides with anti-crescent along aluminum pipe in groove moves, to form capping layer above prime coat, when carrying out prime coat welding and the welding of capping layer, the swing speed of welding gun increases and then keeps constant, meanwhile, the distance that welding gun along the circumferential direction moves shortens and then keeps constant.The present invention carries out butt welding using the aluminum pipe of gapless group pair.The swing speed of welding gun is by slow-to-fast and keeps constant, meanwhile, the distance moved along welding direction from long to short and is kept constant so that base material melts uniformity, improves weldquality.
Description
Technical field
The present invention relates to welding technology fields, specifically, being related to a kind of Al pipe butt welding method.
Background technology
Aviation Al pipe butt welding is typically that bevel stays gap, no matter gap size, all easily welded when welding prime coat
Defect.For example, appearance of weld is bad, lack of penetration, stomata, burn-through, overlap, receives crackle at arc.It is when weld defect severe overweight
Substandard product, x-ray detection examine weld defect to be considered as scrap products more than two level, and welding quality cannot be guaranteed.
Invention content
Weld defect caused by solve aluminum pipe during bevel stays gap weldig, the present invention provide a kind of aluminum pipe weldering
Method is connect, the gapless welding between the aluminum pipe with groove is used for, welding process includes the following steps：Prime coat welds
It connects, using high-frequency arc strike method and decaying breath arc method, on slope while welding gun is swung laterally between groove both sides with "the" shape
Circumferencial direction in mouthful along aluminum pipe moves, to form prime coat；Then capping layer welds, and is ceased using high-frequency arc strike method and decaying
Arc method, circumferencial direction while welding gun is swung laterally between groove both sides with anti-crescent along aluminum pipe in groove move,
To form capping layer above prime coat, wherein when carrying out prime coat welding and the welding of capping layer, the swing speed of welding gun
Increase and then keeps constant, meanwhile, the distance that welding gun along the circumferential direction moves shortens and then keeps constant.
Preferably, welding wire, welding gun and weld seam be in same cross section, welding gun along aluminum pipe radial and normal to weld seam, and
Angle is not less than 105 ° between welding wire and welding gun.
Preferably, the angle of aluminum pipe groove is between 59~61 °, and backing welding electric current is 125~135A, striking and blow-out
The curent change time, welding frequency was between 30~50Hz all between 3~5 seconds.
Preferably, the distance that torch swinging advances after striking is reduced to 0.5~1mm by 1~2 ㎜, and keeps constant.
Preferably, in the welding process of prime coat, argon gas is conveyed in advance in striking 5~10 seconds, and it is then stagnant when blow-out
Stop argon gas 8~15 seconds afterwards.
Preferably, in prime coat welding, when welding again, welding gun is not less than 5mm in arc crater along the front of welding direction
Position on striking, then fall back to the commissure of 2~3mm behind arc crater along the direction opposite with welding direction and start to weld,
In the welding of capping layer, torch swinging speed is accelerated when receiving arc so that each section of weld seam end is formed gradually to drop along welding direction
Low slope, also, when welding point, striking on position of the welding gun in arc crater along the front of welding direction not less than 5mm, and move
Groove 0.5~1mm of corner angle is melted to slope highest point groove side, then swings laterally to the groove other side and melts groove corner angle
0.5~1mm, welding gun along the circumferential direction move while horizontal swing so that joint seamlessly transits.
Preferably, in prime coat and the welding of capping layer, the horizontal swing of welding gun is the slow intermediate fast fortune arc mode in both sides.
Preferably, when capping layer welds, swing laterally what the molten bath of formation was all formed with preceding primary horizontal swing each time
Molten bath overlapping fusion 3/4ths.
Preferably, groove has root face, aluminum pipe root face fitting close to each other.
To reduce weld defect, welding quality is improved, the present invention carries out butt welding using the aviation aluminum pipe of gapless group pair, adopts
With high-frequency arc strike method, tungsten electrode can be prevented to be in direct contact base material and molten bath, in order to avoid form tungsten clip slag.Using decaying blow-out method, weldering
It stitches bead formed on back and width uniformity is presented.Weld job is carried out using argon arc welding, zigzag arc manipulation gimmick is used to prime coat,
Anti- crescent arc manipulation gimmick is used to capping layer.It send argon gas in advance in striking 5~10 seconds, and is then lagged when blow-out and close argon gas 8
~15 seconds, prevent air intrusion molten bath from forming stomata and tungsten electrode oxidation.At the end of the every section of welding of capping layer, weld seam end forms edge
The slope of welding direction so that the joint that welding gun moves welding along welding direction seamlessly transits.The swing speed of welding gun is by slow
To fast and keep constant, meanwhile, the distance moved along welding direction from long to short and is kept constant so that base material fusing is uniform
Unanimously, weldquality is improved.It is detected by x-ray inspection, qualification rate reaches 99%, and welding quality is greatly improved.
Description of the drawings
By the way that embodiment is described in conjunction with following accompanying drawings, features described above of the invention and technological merit will become
More understands and be readily appreciated that.
Fig. 1 is the groove schematic diagram for the aluminum pipe for indicating the embodiment of the present invention；
Fig. 2 is the position view for the welding gun for indicating the embodiment of the present invention；
Fig. 3 is the axial sectional view for the weld seam for indicating the embodiment of the present invention；
Fig. 4 is the vertical view for the prime coat for indicating the embodiment of the present invention；
Fig. 5 is the vertical view for the capping layer for indicating the embodiment of the present invention.
Specific implementation mode
The embodiment of Al pipe butt welding method of the present invention described below with reference to the accompanying drawings.The ordinary skill of this field
Personnel will recognize, without departing from the spirit and scope of the present invention, can use a variety of different modes or its group
Conjunction is modified described embodiment.Therefore, attached drawing and description are regarded as illustrative in nature, rather than for limiting power
The protection domain that profit requires.In addition, in the present specification, attached drawing is drawn not in scale, and identical reference numeral indicates phase
Same part.
The Al pipe butt welding method of the present invention is the aluminum pipe end face docking that will be machined with chamfering, forms welding groove, but aluminium
It is very close to each other between the end face of pipe docking, that is, use gapless welding.Welding method is argon arc welding.Circle of the welding gun along aluminum pipe
Circumferential direction moves (i.e. the arrow direction of Fig. 2), and the movement with welding gun along the circumferencial direction of aluminum pipe forms weld seam in groove, under
To be known as welding direction along the direction of the circumferencial direction formation weld seam of aluminum pipe with the movement of welding gun in text.Welding process include with
Lower step：
Prime coat weld, using high-frequency arc strike method and decaying breath arc method, as shown in figure 4, welding gun between groove both sides with
"the" shape moves while horizontal swing along welding direction, to complete the welding of prime coat.As shown in figure 3, wherein B is shape
At prime coat.
Capping layer welds, and using high-frequency arc strike method and decaying breath arc method, welding gun is between groove both sides with anti-crescent cross
It is moved to while swing along welding direction, to complete the welding of capping layer.As shown in figure 3, wherein A is the capping to be formed
Layer.
Also, in prime coat and the welding of capping layer, the swing speed of welding gun increases and then keeps constant, meanwhile,
The distance moved along welding direction shortens and then keeps constant.As shown in figure 5, anti-crescent arc manipulation method refers to welding gun on slope
Mouth is swung back and forth between both sides with crescent shape arc, a kind of arc manipulation method of the formation crescent moon convex surface facing welding direction.
High-frequency arc strike method is to utilize the gas gap between the high-frequency generator high-frequency and high-voltage breakdown tungsten electrode generated and workpiece
And the electric arc that ignites, tungsten electrode are not directly contacted with base material and molten bath, in order to avoid form tungsten clip slag.
Decaying blow-out method refers to such as 20~30mm in front a distance apart from blow-out point along welding direction, is led to
Overdamping electric current, or electric arc or Accelerating running are raised, until final blow-out.
Its welding process is illustrated with reference to Fig. 1 to Fig. 2.
As shown in Figure 1, forming groove 30 after the docking of the end face of aluminum pipe 10 and aluminum pipe 20.As can be seen that not having between its end face
There is gap.The chamfering of the aluminum pipe of the present embodiment is 30 °, and the angle [alpha] for docking the groove 30 of formation is 60 °.Argon gas uses purity not
Pure argon less than 99.99%.Using inverter type welder, gage of wire can select Φ 3mm.Welding wire 40, welding gun 50 and weld seam
It is in same cross section.Welding gun 50 is to be arranged radial and normal to weld seam along aluminum pipe, and welding wire 40 is then to welding direction side
It is tilted at an angle with welding gun 50.60 diameter of tungsten electrode can be Φ 3mm, and the length that tungsten electrode 60 is stretched out from welding gun 50 is
5mm.Backing welding electric current is 110~160A, preferably 125~135A.The curent change time of its striking and blow-out is all at 3~5 seconds
Between, preferably 4 seconds.30~50Hz of welding frequency, preferably 40Hz.It the above is only some illustrative welding parameters, and do not have to
In the welding method of the limitation present invention.
Prime coat weld when, 60 distance between two tips base material 2mm of tungsten electrode, high-frequency arc strike can prevent tungsten electrode be in direct contact base material and
Molten bath, in order to avoid form tungsten clip slag.The swing speed of welding gun is by slow-to-fast and keeps constant, meanwhile, it is moved along welding direction
Distance from long to short and is kept constant.That is, since the temperature of newly formed molten bath base material is relatively low, the lateral pendulum of welding gun
Dynamic speed can be slow, and welding gun is somewhat larger along the displacement distance of welding direction.So that base material melts uniformity, weldering is improved
Stitch quality.For example, preceding four swings, torch swinging forward travel distance are 1~2mm after striking.Wait for that base material temperature gradually rises to just
Normal welding temperature, then welding gun be reduced to 0.5~1mm along the displacement distance of welding direction, the horizontal swing speed of welding gun also tends to
It is constant.Width uniformity is presented using decaying blow-out, back of weld molding when receiving arc.Preferably, the reinforcement of back of weld is equal
It is even and be no more than 0.5mm.
When capping layer welds, welded using anti-crescent gimmick, the distance between two tips base material 5mm of tungsten electrode 60.Welding gun arbitrarily stops
It laterally draws arc after 0.5~1mm of arbitrary groove corner angle fusing base material and is rocked to other side groove rib in the side in the groove of both sides
Angle, 0.5~1mm of fusing base material.Since the temperature of newly formed molten bath base material is relatively low, the horizontal swing speed of welding gun will be by slow
To remaining unchanged again soon, meanwhile, the distance moved along welding direction from long to short and is kept constant.For example, preceding lateral three times
It is 3mm to swing along the distance that welding direction is advanced, and after base material temperature gradually rises to normal weld temperature, is laterally put each time
The dynamic distance advanced along welding direction becomes 2mm, so repeats to weld.
In one alternate embodiment, groove has root face, aluminum pipe root face fitting close to each other.Wherein, root face refers to
Along the not bevelled end face part in aluminum pipe wall thickness direction.
In one alternate embodiment, as shown in Figure 1, ranging from 59~61 ° of the angle [alpha] of aluminum pipe groove.
In one alternate embodiment, as shown in Fig. 2, welding wire, welding gun and weld seam are in same cross section, welding gun is along aluminium
Pipe radial and normal to weld seam, and between welding wire and welding gun angle β be not less than 105 °.Wherein arrow indicates weldering in the circumferential direction
It can be clockwise to connect direction, can also be counterclockwise.
In one alternate embodiment, in the welding process of prime coat, argon gas is sent in advance in striking 5~10 seconds, and
It is then lagged when blow-out and closes argon gas 8~15 seconds.For example, tungsten electrode can be waited until in just close argon gas after kermesinus, about lag close 8~
15 seconds, striking position argon gas is made to open air insulated, molten bath obtains argon gas and adequately protects when welding, prevents air from invading molten bath shape
It is aoxidized at stomata and tungsten electrode.
In one alternate embodiment, prime coat welding in, when welding again, welding gun along welding direction from arc crater to
Then striking on the position of preceding 3~6mm is fallen back along the direction opposite with welding direction to starting at 2~3mm of weld seam behind arc crater
Welding, makes weld seam and arc crater obtain sufficient re-melting.Wherein, arc crater refer to one weld seam terminal formed be less than weld seam
The recess of height is cheated.
In one alternate embodiment, in the welding of capping layer, when wire melting to end receives arc, torch swinging speed becomes
Soon so that fusing iron water amount is few, laterally draws arc amplitude of fluctuation and reduces so that at the end of every section of welding, weld seam is formed along welding side
To slope.When welding point, welding gun striking on the position of 3~6mm before arc crater in welding direction, and after move to slope most
Groove 0.5~1mm of corner angle is melted in eminence groove side, then laterally moves to groove other side fusing groove 0.5~1mm of corner angle, makes
Welding gun moves the joint of welding along welding direction and seamlessly transits.
In one alternate embodiment, in prime coat and the welding of capping layer, welding burn-off rate is uniform, keeps electric arc
Length is constant, forms the slow intermediate fast fortune arc mode in both sides, both sides groove corner angle is made fully to be fused, and reduces weld seam molten bath
Central temperature obtains high quality weld seam.
In one alternate embodiment, when capping layer welds, the molten bath for swinging formation each time all should be with preceding primary swing
The molten bath overlapping fusion 3/4ths of formation.The Al pipe butt welding method of the present invention is applied to the welding between aluminum pipe, using continuously
The mode of gap welding.Using high-frequency arc strike method, tungsten electrode can be prevented to be in direct contact base material and molten bath, in order to avoid form tungsten clip
Slag.Using decaying blow-out method, width uniformity is presented in back of weld molding.Weld job is carried out using argon arc welding, to bottoming
Layer uses zigzag arc manipulation gimmick, and anti-crescent arc manipulation gimmick is used to capping layer.Send argon gas in advance in striking 5~10 seconds,
And then lagged when blow-out and close argon gas 8~15 seconds, prevent air intrusion molten bath from forming stomata and tungsten electrode oxidation.The every section of welding of capping layer
At the end of, weld seam end is formed along the slope of welding direction so that the joint that welding gun moves welding along welding direction is smoothed
It crosses.The swing speed of welding gun is by slow-to-fast and keeps constant, meanwhile, the distance moved along welding direction from long to short and is kept
It is constant so that base material melts uniformity, improves weldquality.It is detected by x-ray inspection, qualification rate reaches 99%, welding
Quality is greatly improved.
The foregoing is merely the preferred embodiment of the present invention, are not intended to restrict the invention, for those skilled in the art
For member, the invention may be variously modified and varied.Any modification made by all within the spirits and principles of the present invention,
Equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of Al pipe butt welding method is used for the gapless welding between the aluminum pipe with groove, which is characterized in that welding
Process includes the following steps：
Prime coat welds, and using high-frequency arc strike method and decaying breath arc method, welding gun is laterally put between groove both sides with "the" shape
Circumferencial direction while dynamic along aluminum pipe in groove moves, to form prime coat；Then
Capping layer welds, and using high-frequency arc strike method and decaying breath arc method, welding gun is laterally put between groove both sides with anti-crescent
Circumferencial direction while dynamic along aluminum pipe in groove moves, to form capping layer above prime coat,
Wherein, when carrying out prime coat welding and the welding of capping layer, the swing speed of welding gun increases and then keeps constant, together
When, the distance that welding gun along the circumferential direction moves shortens and then keeps constant.
2. Al pipe butt welding method according to claim 1, which is characterized in that
Welding wire, welding gun and weld seam in same cross section, welding gun along aluminum pipe radial and normal to weld seam, and welding wire and welding gun it
Between angle be not less than 105 °.
3. Al pipe butt welding method according to claim 1, which is characterized in that
For the angle of aluminum pipe groove between 59~61 °, backing welding electric current is 125~135A, when the curent change of striking and blow-out
Between all between 3~5 seconds, welding frequency is between 30~50Hz.
4. Al pipe butt welding method according to claim 1, which is characterized in that
The distance that torch swinging advances after striking is reduced to 0.5~1mm by 1~2 ㎜, and keeps constant.
5. Al pipe butt welding method according to claim 1, which is characterized in that
In the welding process of prime coat, argon gas is conveyed in advance in striking 5~10 seconds, and then lagged when blow-out and stop argon gas 8
~15 seconds.
6. Al pipe butt welding method according to claim 1, which is characterized in that
In prime coat welding, when welding again, welding gun draws on the position in arc crater along the front of welding direction not less than 5mm
Then arc falls back to the commissure of 2~3mm behind arc crater along the direction opposite with welding direction and starts to weld,
In the welding of capping layer, torch swinging speed is accelerated when receiving arc so that each section of weld seam end formed along welding direction by
The slope gradually reduced,
Also, when welding point, striking on position of the welding gun in arc crater along the front of welding direction not less than 5mm, and move to tiltedly
Groove 0.5~1mm of corner angle is melted in slope highest point groove side, then swing laterally to groove other side fusing groove corner angle 0.5~
1mm, welding gun along the circumferential direction move while horizontal swing so that joint seamlessly transits.
7. Al pipe butt welding method according to claim 1, which is characterized in that
In prime coat and the welding of capping layer, the horizontal swing of welding gun is the slow intermediate fast fortune arc mode in both sides.
8. Al pipe butt welding method according to claim 1, which is characterized in that
When capping layer welds, the molten bath fusion all Chong Die with the molten bath that preceding primary horizontal swing is formed of formation is swung laterally each time
3/4ths.
9. Al pipe butt welding method according to claim 1, which is characterized in that
Groove has root face, aluminum pipe root face fitting close to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810159106.4A CN108453351B (en) | 2018-02-26 | 2018-02-26 | Aluminum pipe welding method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810159106.4A CN108453351B (en) | 2018-02-26 | 2018-02-26 | Aluminum pipe welding method |
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| CN108453351A true CN108453351A (en) | 2018-08-28 |
| CN108453351B CN108453351B (en) | 2020-07-10 |
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Cited By (4)
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| CN111633300A (en) * | 2020-06-11 | 2020-09-08 | 中国工程物理研究院机械制造工艺研究所 | Butt welding method for 5A06 aluminum alloy pipes |
| CN112475514A (en) * | 2020-10-16 | 2021-03-12 | 苏州浪潮智能科技有限公司 | Circuit board welding method, circuit board and electronic equipment |
| CN113664343A (en) * | 2021-09-02 | 2021-11-19 | 内蒙古第一机械集团股份有限公司 | Double-wire welding method for armor material GY4 |
| CN113909651A (en) * | 2021-09-30 | 2022-01-11 | 北京博清科技有限公司 | Welding method for calandria |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111633300A (en) * | 2020-06-11 | 2020-09-08 | 中国工程物理研究院机械制造工艺研究所 | Butt welding method for 5A06 aluminum alloy pipes |
| CN112475514A (en) * | 2020-10-16 | 2021-03-12 | 苏州浪潮智能科技有限公司 | Circuit board welding method, circuit board and electronic equipment |
| CN112475514B (en) * | 2020-10-16 | 2022-06-07 | 苏州浪潮智能科技有限公司 | Circuit board welding method, circuit board and electronic equipment |
| CN113664343A (en) * | 2021-09-02 | 2021-11-19 | 内蒙古第一机械集团股份有限公司 | Double-wire welding method for armor material GY4 |
| CN113909651A (en) * | 2021-09-30 | 2022-01-11 | 北京博清科技有限公司 | Welding method for calandria |
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| CN108453351B (en) | 2020-07-10 |
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