CN109014511A - A kind of heated filament pulsed argon arc H-P-TIG automatic welding method - Google Patents
A kind of heated filament pulsed argon arc H-P-TIG automatic welding method Download PDFInfo
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- CN109014511A CN109014511A CN201811146684.0A CN201811146684A CN109014511A CN 109014511 A CN109014511 A CN 109014511A CN 201811146684 A CN201811146684 A CN 201811146684A CN 109014511 A CN109014511 A CN 109014511A
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- welding
- tig
- argon arc
- heated filament
- pulsed argon
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Classifications
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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
-
- 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
- B23K9/095—Monitoring or automatic control of welding parameters
Abstract
The invention discloses a kind of heated filament pulsed argon arc H-P-TIG automatic soldering methods, for caliber φ≤8'', the small diameter tube of wall thickness t≤5mm; the automatic bottom welding of sheet-metal duct automatic welding or the big-and-middle caliber process duct of caliber φ >=6''; carry out groove by ASME standard and open system; two kinds of groups may be selected to mode, dwell set is to needing to add welding wire spot welding or gapless group to use self-melt spot welding；It is different to mode according to group, heated filament pulsed argon arc H-P-TIG silk filling bottoming or certainly molten bottoming, H-P-TIG silk filling cover welding may be selected.Stringenter material, welding process back side argon filling and postwelding weld seam argon-filled protection require heat input for stainless steel etc..The present invention can reduce thermal weld stress amount, improve the quality of backing welding；In the case that welding current is certain, heated filament pulsed argon arc welding wire melting is obtained more, and deposited metal amount increases；40-50% can be improved than conventional argonaut welding welding efficiency.
Description
Technical field
The invention belongs to Pipeline automatic welding technology field, in particular to a kind of automatic welding side heated filament pulsed argon arc H-P-TIG
Method.
Background technique
In traditional automatic welding, when minor diameter thin wall pipe (caliber φ≤8 ", t≤5mm), have some limitations, it is special
It is not automatic welding stainless steel, steel alloy etc., when requiring the minor diameter thin wall pipe of stringenter material to heat input, bottom welding
When can only use low current small voltage, and when using traditional argon arc GTAW welding, be easy weldering leakage, burn, low efficiency can not guarantee
Welding quality, it is therefore desirable to which it is low to develop a kind of heat input, can guarantee appearance of weld quality, and greatly improve the weldering of welding efficiency
Technique and equipment are connect, when successfully breaking small diameter tube thin-wall tube automatic welding, using the efficiency of manual welding much larger than automation weldering
The limitation of the welding efficiency connect.
Pulsed argon arc welding is a kind of welding procedure that argon arc welding is carried out with pulse current, and this technique can be preferably
Penetration, weld width, protuberance, undercut and heat input are controlled, a continuous fine and close weld seam is obtained.Major advantage is: bottoming
Easily-controlled operation；Save wlding；Heat input is low；Welding fabrication is good, and lines is fine and closely woven.
Summary of the invention
The technical problem to be solved by the present invention is to the shortcomings that overcoming the prior art, provide a kind of process pipe heated filament arteries and veins
It rushes argon arc H-P-TIG automatic welding method, solves caliber φ≤8 " in industry, the small diameter tube of wall thickness t≤5mm, sheet-metal duct is automatic
The automatic bottom welding process of welding or the big-and-middle caliber of caliber φ >=6 " especially in bottom welding process, is easy weldering leakage, burns
It wears, low efficiency, can not guarantee the confinement problems of welding quality.
In order to solve the above technical problems, the present invention is directed to caliber φ≤8 ", the small diameter tube of wall thickness t≤5mm, sheet-metal duct
The big-and-middle automatic bottom welding of caliber pipeline of automatic welding or caliber φ >=6 ", provides a kind of process pipe heated filament pulsed argon arc
H-P-TIG welding operator's process rises and is characterized in that:
A kind of heated filament pulsed argon arc H-P-TIG automatic welding method, for caliber φ≤8 ", wall thickness t≤5mm small diameter tube,
The big-and-middle automatic bottom welding of caliber pipeline of sheet-metal duct automatic welding or caliber φ >=6 ", it is characterised in that:
As tube wall thickness t >=3mm: bevel, no root face, using having dwell set to form, heated filament pulsed argon arc H-P-TIG
Fill silk bottom welding or bevel, root face, using gapless group to form, pulsed argon arc P-TIG from molten bottom welding or
Heated filament pulsed argon arc H-P-TIG silk filling bottom welding；Cosmetic welding is filled using heated filament pulsed argon arc H-P-TIG silk filling multilayer multiple tracks
It connects；
As tube wall thickness 2mm < t < 3mm: square groove, no root face beat form, P-TIG from molten using gapless group
Bottom, heated filament pulsed argon arc H-P-TIG silk filling cover welding；
When tube wall thickness t≤2mm, square groove, no root face, using gapless group to form, heated filament pulsed argon arc H-P-
TIG filler wire welding welds together.
Preferably, welding process weld procedure specification are as follows: low-frequency pulse 2-10Hz, peak point current 195-300A, base value electricity
Flow 50-120A, arc voltage 10-18V, speed of welding 100-160mm/min.
The present invention also provides a kind of postwelding weld joint protective devices, including air inlet pipe connector, welding gun clamping end, weld seam gas
Protective cover, main material are copper, it is characterised in that: the weld seam gas shield cover is arcuate structure, and middle part is equipped with air inlet,
The air inlet pipe connector is connected to welding with the air inlet in weld seam gas shield cover；The welding gun clamping end is welded on weld seam gas
One end of body protective cover；Steel wire built in the weld seam gas shield cover, is uniformly distributed gas in protective cover；The weldering
Rifle clamping end is cylindrical structure, and section is that Semi-folding is round, can be directly sleeved on welding gun.
What the present invention had compared with prior art has the beneficial effect that
Heated filament pulsed argon arc H-P-TIG automatic welding method of the present invention solves process pipe caliber φ≤8 ", wall in industry
The big-and-middle automatic backing welding of caliber pipeline of the small diameter tube of thick t≤5mm, sheet-metal duct automatic welding or caliber φ >=6 " is taken over
In journey, especially bottom welding process, it is easy weldering leakage, is burnt, low efficiency can not guarantee the confinement problems of welding quality.It is logical
Cross the exploitation of this technology, it is possible to reduce thermal weld stress amount guarantees that thin-wall tube backing welding through welding without burn-through, mentions significantly
The quality of high backing welding；In the case that welding current is certain simultaneously, heated filament pulsed argon arc welding wire melting is obtained more, deposited metal
Amount increases；Bottoming easily-controlled operation saves wlding, and welding fabrication is good, and lines is fine and closely woven, can mention with conventional argonaut welding welding efficiency
High 40-50%.
Detailed description of the invention
Fig. 1 is tube wall thickness t >=3mm gapless groove schematic diagram；
Fig. 2 is that tube wall thickness t >=3mm has gap groove schematic diagram；
Fig. 3 is tube wall thickness t < 3mm groove schematic diagram；
Fig. 4 is postwelding weld joint protective device three-view diagram.
Attached drawing remarks:
α expression bevel angle in Fig. 1, Fig. 2, Fig. 3, t expression tube wall thickness, b expression groove gap (gapless group clock synchronization,
The range for needing to control b is 0-0.5mm), d indicates root face height.
C is the diameter of postwelding weld joint protective device air inlet pipe in Fig. 4, and f is welding gun clamping end welding gun shank diameter, and R is weld seam
The radius of gas shield cover is adapted to a certain range of technique caliber, and according to different caliber ranges, R is also otherwise same.
Specific embodiment
Further narration in detail is made to specific embodiments of the present invention with reference to the accompanying drawing.
A kind of process pipe heated filament pulsed argon arc H-P-TIG welding operator's process provided in this embodiment is suitable for small
The automatic bottom welding of diameter thin-wall tube automatic welding or big-and-middle caliber, comprising:
1. being directed to caliber φ≤8 ", the small diameter tube of wall thickness t≤5mm, sheet-metal duct automatic welding or caliber φ >=6 " are big
The automatic bottom welding of middle caliber；
2. pressing ASME standard, carry out groove and open system, optional two kinds of groups are to mode: dwell set pair, when spot welding, need to add
Welding wire；Gapless group pair, using self-melt spot welding；
3. after pre-welding treatment, according to group to mode difference, when bottom welding, heated filament pulsed argon arc H-P-TIG may be selected and fill out
Silk bottoming or certainly molten bottom welding；
4. in welding process, the position of adjustment 11 thirty of welding torch position is welded, pipe rotation, weld seam real-time tracking,
Adjustment in real time controls electric arc height and left-right position.This weld procedure specification is low-frequency pulse 2-10Hz, peak point current 195-
300A, background current 50-120A, arc voltage 10-18V, speed of welding 100-160mm/min.
5. postwelding passes through weld appearance detection, X-ray detection, ultrasound examination, ultrasound examination, tensile strength and impact
Toughness test.
6. requiring heat input stringenter material for stainless steel etc., welding process needs back side argon filling and postwelding to weld
Stitch argon-filled protection；More lower material is required to heat input for carbon steel etc., the welding process back side is not necessarily to argon-filled protection, both may be used
To weld out good appearance of weld and bead formed on back.
Its welding method is as follows in actual operation:
1. welding equipment and material
(1) welding equipment is that heated filament pulsed argon arc welding connects equipment, and power supply is Miller argon arc special welding power supply.
Pulsed argon arc welding is a kind of welding procedure to grow up on the basis of common argon tungsten-arc welding, is to utilize base value electricity
Stream keeps the ionization channels of main arc, and periodically a same polarity peak value pulse current is added to generate pulsed arc, with fusing
Metal and the argon arc welding for controlling the droplet transfer.This combination can preferably control penetration, weld width, protuberance, undercut and heat
Amount input obtains a continuous fine and close weld seam.
Welding wire heating uses copper sheathing winding heater, and the heating of coil galvanization heats the welding wire passed through, so
It is sent into electric arc afterwards, molten bath is instilled by the preheated welding wire of arc-melting and forms weld seam.Power supply is provided by welding host electric cabinet,
Direct current thermal resistance heats welding wire, and hot-wire temperature controls at 140 ± 15 DEG C.Heating temperature is determined by wire feed rate, by quasi-
Heating temperature and speed of welding relationship are closed, control system is integrated into, according to speed of welding speed automatic adjusument hot-wire temperature.It is main
Power supply belt pulsation process, peak point current melt the welding wire having been warmed up, and background current molten bath is sprawled.When heated filament operates, by operating
Work gives wire feed rate, and heter temperature setting value is exported after PLC converts, is powered on, the heating of copper sheathing winding heater, real
When acquisition heating temperature feed back to temperature controller, by inside temperature controller PID self-regulation realize hot-wire temperature in constant range.
(2) welding material base material is stainless steel tube TP321, meets ASTM A321/A321M standard, specification is respectively φ
159*10mm/ φ 89*4mm/ φ 60*3mm/ φ 60*2mm, yield strength > 205Mpa, tensile strength > 515Mpa；Using Φ 1.2
Stainless steel argon arc welding wire TM-56, complies with standard AWS A5.9ER308L；
(3) argon gas, purity >=99.99%.
2. welding preparation
(1) pipe fitting is processed: it is processed using numerically-controlled machine tool, stainless-steel pipe 304 is cut off or opens groove processed, as shown in Figure 1,
V-butt, bevel angle α are 60 ± 5 °, and root face d is 1-2mm (group clock synchronization, gap b are controlled in 1-3mm)；As shown in Fig. 2, V-type
Bevel angle α is 60 ± 5 °, (group clock synchronization, gap b are controlled in 1-3mm)；As shown in figure 3, square groove, gapless (gapless group
Clock synchronization, gap b are controlled in 0-0.5mm)；Unfitness of butt joint is to be less than or equal to 1.5mm greater than 0；
(2) clear up: the dirts such as iron rust, greasy dirt within the scope of 20~30mm of pipe bevel edge are polished dry with electric angle grinder
Only；
(3) Butt Assembling: tube wall thickness t >=3mm can select routine to have dwell set to form, and fill silk spot welding, and group is to mistake
Journey, bridging-spot welding-argon filling-grind off bridging solder joint, and process is more complicated, do not receive gapless mainly for some project scenes
Welding procedure；Bevel, 1-2mm root face can also be separately selected, gapless group pair is welded from fusing point, and group is simple to operation to process,
Unfitness of butt joint need to control within 1.5mm；Tube wall thickness t < 3mm, square groove, no root face, gapless group to；Tube wall thickness
T≤2mm, square groove, no root face are to form, heated filament pulsed argon arc H-P-TIG filler wire welding together weldering using gapless group
It can.
(4) before welding, the position of adjustment 11 thirty of welding torch position is welded, and angle of welding gun is vertical between 20 °~30 °
In pipe fitting section；
(5) check whether water route gas circuit is unimpeded, and protective gas (>=99.9%Ar) flow be adjusted to 10~15L/min,
Backing gas 5~10L/min of flow, 15~20L/min of postwelding weld seam protection gas flow (stagnant gas after first ventilating).
Such as Fig. 4, postwelding weld joint protective device keeps weld seam not oxidized for protecting to welding line.It is wrapped in structure
Air inlet pipe connector 1, welding gun clamping end 3, weld seam gas shield cover 2 are included, main material is copper, and weld seam gas shield cover 2 is arc
Shape structure, middle part are equipped with air inlet, and air inlet pipe connector 1 is connected to welding with the air inlet in weld seam gas shield cover 2.Welding gun
Clamping end 3 is welded on one end of weld seam gas shield cover 2.Steel wire built in weld seam gas shield cover keeps gas in protective cover equal
Even distribution.Welding gun clamping end is cylindrical structure, and section is that Semi-folding is round, can be directly sleeved on welding gun.
3. welding process
(1) welding position: the position 1G, pipe rotation, the torch does not move；
(2) for the penetration for guaranteeing the back side, welding torch position, bottom welding position selection weldering downwards, welding gun welding torch position: are adjusted
At 11 half positions of pipe fitting or so, angle of welding gun is between 20 °~30 ° perpendicular to pipe fitting section；
(3) in welding process, pipe rotation, weld seam real-time tracking adjusts in real time, controls electric arc height and left-right position.
Gap heated filament pulsed argon arc H-P-TIG silk filling bottom welding or gapless pulsed argon arc has may be selected in tube wall thickness t >=3mm
The certainly molten bottoming of P-TIG or gapless heated filament pulsed argon arc H-P-TIG silk filling three kinds of bottom welding modes of bottoming, heated filament pulse argon
Arc H-P-TIG silk filling multilayer multiple tracks fills cover welding mode；Tube wall thickness t < 3mm, only needs square groove, gapless P-TIG
It is welded together from molten bottoming, H-P-TIG silk filling cover welding or t≤2mm, heated filament pulsed argon arc filler wire welding.Bottoming
Journey is easy to control, and heat input is low, and welding fabrication is good, and lines is fine and closely woven.
Gapless has gap H-P-TIG silk filling bottom welding technological parameter such as table from molten bottom welding technological parameter such as table 1
Shown in 2.
Table 1: the certainly molten bottom welding technological specification of gapless
Table 2: there is gap H-P-TIG silk filling bottom welding technological specification
4. inspection after welding: by weld appearance detection, X-ray detection, ultrasound examination, tensile strength and impact flexibility examination
Test, detection and test result are that appearance of weld is good, face of weld without do not merge significantly, the macroscopic view welding such as lack of penetration, undercut
Defect, weld strength is up to the 90% of strength of parent, the microcosmic welding defect such as internal pore-free, slag inclusion, crackle.
The above examples only illustrate the technical idea of the present invention, and this does not limit the scope of protection of the present invention, all
According to the technical idea provided by the invention, any changes made on the basis of the technical scheme each falls within the scope of the present invention
Within.
Claims (7)
1. a kind of heated filament pulsed argon arc H-P-TIG automatic welding method, for the small diameter tube, thin of caliber φ≤8'', wall thickness t≤5mm
The big-and-middle automatic bottom welding of caliber pipeline of wall automatic welding of pipelines or caliber φ >=6'', it is characterised in that:
As tube wall thickness t >=3mm: bevel, no root face, using have dwell set to form, heated filament pulsed argon arc H-P-TIG fill silk
Bottom welding or bevel, root face, using gapless group to the certainly molten bottom welding of form, pulsed argon arc P-TIG or heated filament
Pulsed argon arc H-P-TIG silk filling bottom welding；Cover welding is filled using heated filament pulsed argon arc H-P-TIG silk filling multilayer multiple tracks；
As tube wall thickness 2mm < t < 3mm: square groove, no root face, using gapless group to form, P-TIG certainly molten bottoming, heat
Silk pulsed argon arc H-P-TIG silk filling cover welding；
As tube wall thickness t≤2mm, square groove, no root face fills out form, heated filament pulsed argon arc H-P-TIG using gapless group
Wire bond connects one of weldering.
2. heated filament pulsed argon arc H-P-TIG automatic welding method as described in claim 1, it is characterised in that welding process Welder
Skill specification are as follows: low-frequency pulse 2-10Hz, peak point current 195-300A, background current 50-120A, arc voltage 10-18V, welding
Speed 100-160mm/min.
3. heated filament pulsed argon arc H-P-TIG automatic welding method as described in claim 1, it is characterised in that welding process adjustment weldering
The position that rifle position set for 11 thirty is welded, pipe rotation, and weld seam real-time tracking, in real time adjustment control electric arc height and left and right
Position.
4. heated filament pulsed argon arc H-P-TIG welding method as described in claim 1, it is characterised in that gapless group clock synchronization,
Gap is controlled in 0-0.5mm；There is dwell set clock synchronization, gap is controlled in 1-3mm.
5. heated filament pulsed argon arc H-P-TIG welding method as described in claim 1, it is characterised in that group clock synchronization, unfitness of butt joint control
System is within 1.5mm.
6. heated filament pulsed argon arc H-P-TIG welding method as described in claim 1, it is characterised in that: for being wanted to heat input
Ask the material that comparison is stringent, welding process back side argon-filled protection and postwelding weld seam argon-filled protection.
7. a kind of postwelding weld joint protective device, including air inlet pipe connector (1), welding gun clamping end (3), weld seam gas shield cover
(2), main material is copper, it is characterised in that: the weld seam gas shield cover (2) is arcuate structure, and middle part is equipped with air inlet,
The air inlet pipe connector (1) is connected to welding with the air inlet on weld seam gas shield cover (2)；Welding gun clamping end (3) weldering
Connect one end in weld seam gas shield cover (2)；Steel wire built in the weld seam gas shield cover (2), makes gas in protective cover
It is uniformly distributed；The welding gun clamping end (3) is cylindrical structure, and section is that Semi-folding is round, can be directly sleeved on welding gun.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109877424A (en) * | 2019-03-22 | 2019-06-14 | 哈尔滨锅炉厂有限责任公司 | G115 small-bore pipe heating wire TIG welding method |
| CN110480132A (en) * | 2019-09-19 | 2019-11-22 | 张家港市恒强冷却设备有限公司 | The welding processing of nuclear power motor cooler |
| CN110871301A (en) * | 2018-09-04 | 2020-03-10 | 中国石化工程建设有限公司 | Tungsten inert gas shielded welding method for nickel-based alloy furnace tube |
| CN112045281A (en) * | 2020-08-31 | 2020-12-08 | 广西中亿实业集团有限公司 | High-yield welding process for steel |
| CN112620988A (en) * | 2020-12-21 | 2021-04-09 | 华能山东石岛湾核电有限公司 | Process for reducing welding deformation |
| CN112719659A (en) * | 2020-12-11 | 2021-04-30 | 渤海造船厂集团有限公司 | Method for directly butt welding iron cupronickel and stainless steel pipe fitting without gap |
| CN113245672A (en) * | 2021-04-21 | 2021-08-13 | 内蒙古航天红岗机械有限公司 | Argon arc welding method for ultrahigh-strength steel |
| CN113369812A (en) * | 2021-06-07 | 2021-09-10 | 沈阳育成鑫成果转化技术服务有限公司 | Battery pack tray for electric automobile and manufacturing method thereof |
| CN114762908A (en) * | 2021-01-13 | 2022-07-19 | 宝山钢铁股份有限公司 | One-step forming welding method for thin-wall low-alloy high-strength steel butt joint |
| CN114833430A (en) * | 2022-05-23 | 2022-08-02 | 楼蓝科技(江苏)有限公司 | Argon arc welding seam welding method suitable for fillet weld of thin-wall part |
| CN115846877A (en) * | 2022-12-31 | 2023-03-28 | 中联重科股份有限公司 | Workpiece welding method and welded structural member |
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| CN110871301A (en) * | 2018-09-04 | 2020-03-10 | 中国石化工程建设有限公司 | Tungsten inert gas shielded welding method for nickel-based alloy furnace tube |
| CN109877424A (en) * | 2019-03-22 | 2019-06-14 | 哈尔滨锅炉厂有限责任公司 | G115 small-bore pipe heating wire TIG welding method |
| CN110480132A (en) * | 2019-09-19 | 2019-11-22 | 张家港市恒强冷却设备有限公司 | The welding processing of nuclear power motor cooler |
| CN112045281A (en) * | 2020-08-31 | 2020-12-08 | 广西中亿实业集团有限公司 | High-yield welding process for steel |
| CN112719659A (en) * | 2020-12-11 | 2021-04-30 | 渤海造船厂集团有限公司 | Method for directly butt welding iron cupronickel and stainless steel pipe fitting without gap |
| CN112620988A (en) * | 2020-12-21 | 2021-04-09 | 华能山东石岛湾核电有限公司 | Process for reducing welding deformation |
| CN114762908A (en) * | 2021-01-13 | 2022-07-19 | 宝山钢铁股份有限公司 | One-step forming welding method for thin-wall low-alloy high-strength steel butt joint |
| CN113245672A (en) * | 2021-04-21 | 2021-08-13 | 内蒙古航天红岗机械有限公司 | Argon arc welding method for ultrahigh-strength steel |
| CN113369812A (en) * | 2021-06-07 | 2021-09-10 | 沈阳育成鑫成果转化技术服务有限公司 | Battery pack tray for electric automobile and manufacturing method thereof |
| CN114833430A (en) * | 2022-05-23 | 2022-08-02 | 楼蓝科技(江苏)有限公司 | Argon arc welding seam welding method suitable for fillet weld of thin-wall part |
| CN115846877A (en) * | 2022-12-31 | 2023-03-28 | 中联重科股份有限公司 | Workpiece welding method and welded structural member |
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