CN103170711B - Manual " crank weldering " method of TIG weldering - Google Patents
Manual " crank weldering " method of TIG weldering Download PDFInfo
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- CN103170711B CN103170711B CN201310093693.9A CN201310093693A CN103170711B CN 103170711 B CN103170711 B CN 103170711B CN 201310093693 A CN201310093693 A CN 201310093693A CN 103170711 B CN103170711 B CN 103170711B
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Abstract
The invention provides a kind of TIG and weld manual " crank weldering " method, comprise the steps: S110: the inspection of equipment before weldering; Remove the foreign material within the scope of groove and each 10-20mm of both sides of edges thereof, until expose metallic luster; S120: the tight-lipped groove that leans against of the pottery of argon-arc welding gun does the strong point; S130: argon-arc welding gun tilts in the other direction along welding bead, and angle of inclination is 130 °; S140: left and right tiltedly swings argon-arc welding gun and draws arc welding, first carries out picture arc backing welding, after groove fuses, accelerates welding frequency to control the thin and thick of welding bead interlayer and interlayer temperature; Carry out the bigger cover welding of argon-arc welding gun oscillator arc again; S150: after weld seam is soldered, welder checks weld appearance quality, thinning surface defect.Manual " crank weldering " method of TIG provided by the invention weldering, burn-off phenomenon can be solved and cause welding bead back shrinkage hole, cave in and the problem such as to stay.
Description
Technical field
The present invention relates to TIG (Tungsten Inert Gas, non-consumable gas shielded arc welding are called for short TIG) welding technology field, more specifically, relate to a kind of TIG and weld manual " crank weldering " method.
Background technology
Non-consumable gas shielded arc welding (being called for short TIG) is also known as argon tungsten-arc welding or gas tungsten arc welding; it uses pure tungsten or activation tungsten electrode; using inert gas-argon gas as the electrogas process of protective gas; it is non-fusible that tungsten bar electrode only plays electric action, produces electric arc after energising between tungsten electrode and workpiece.
Electric arc and the molten bath observability of non-consumable gas shielded arc welding are good, easy to operate; There is no slag or little slag, without the need to postwelding scarfing cinder; In welding process, must get well because weld seam is protected, therefore weld metal purity is high, performance good; During welding, heating is concentrated, so weldment distortion is little; Arc stability is good, and when small area analysis (<10A), electric arc also can smooth combustion.TIG welding can be divided into again manual welding and automatic welding two kinds, comparatively extensive with GTAW application.
In pipeline welding, manual argon arc is more common method, and common welding method thinks little of control temperature, and cause the interlayer of welding bead too thick, overstand, therefore easily causes burn-off phenomenon.Burning is the difficulty of the most difficult breakthrough in welding; When burning causes downhand welding and overhead welding, welding bead back easily formed stay, the defect such as depression; Meanwhile, require higher to the operant level of welder.After pipeline welding completes, X-ray detects qualification rate 80 to nine 15, and repair rate is high, wlding and artificial drop into also larger.Therefore, original welding method can not adapt to actual requirement, needs a kind of new TIG welding method.
Summary of the invention
In view of the above problems, the object of this invention is to provide a kind of TIG and weld manual " crank weldering " method, the welding bead back shrinkage hole caused to solve burn-off phenomenon, cave in and the problem such as to stay.
Manual " crank weldering " method of TIG weldering provided by the invention, comprises the steps:
S110: the inspection of equipment before weldering; Check that argon gas cylinder valve is with or without gas leakage and malfunctioning, whether wireway is unimpeded, and whether the instrument and meter such as current voltmeter, flowmeter is normal; Connect welding change-over switch, mix up welding current, down slope time, gas lag time, choose length change-over switch, regulate numerical value needed for argon flow amount; Perform workmen's protection and field labor protection; Tungsten bar is worn into required form, and regulating tungsten electrode, to stretch out nozzle length be 3-6mm; The electric power polarity of GTAW is straight polarity direct current; Remove the foreign material within the scope of groove and each 10-20mm of both sides of edges thereof, until expose metallic luster;
S120: the tight-lipped groove that leans against of the pottery of argon-arc welding gun does the strong point;
S130: argon-arc welding gun tilts in the other direction along welding bead, and angle of inclination is 130 °;
S140: left and right tiltedly swings argon-arc welding gun and draws arc welding, first carries out picture arc backing welding, after groove fuses, accelerates welding frequency to control the thin and thick of welding bead interlayer and interlayer temperature; Carry out the bigger cover welding of argon-arc welding gun oscillator arc again; Wherein, if when the duct thickness of welding is 3-6mm, adopt two-layer welding; When welding is interrupted, again play weldering 6-8mm overlapping with former weld seam, to make welding comprehensively, do not occur solder skip;
S150: after weld seam is soldered, welder checks weld appearance quality, thinning surface defect.
In addition, preferred scheme is, in step S140, welding bead outward appearance presents trickle fish scale-shaped, silvery white, and width is consistent, and evenly, reinforcement is 0.2-0.5mm to height.
In addition, preferred scheme is, in step S140, stablizing, avoiding occurring burn-off phenomenon by accelerating welding frequency with the thin and thick and interlayer that control described welding bead interlayer.
In addition, preferred scheme is, in step S140, fusing groove corner angle during cover welding is 0.5-1mm.
Manual " crank weldering " method of TIG weldering provided by the invention can obtain following beneficial effect:
1) pipeline welding quality is high, and after welding procedure completes, X-ray detects qualification rate more than 98;
2) the anti-revisionist rate of pipeline welding finished product can be reduced;
3) wlding is saved;
4) enhance productivity;
5) welding quality can be controlled well.
In order to realize above-mentioned and relevant object, will describe in detail and the feature particularly pointed out in the claims after one or more aspect of the present invention comprises.Explanation below and accompanying drawing describe some illustrative aspects of the present invention in detail.But what these aspects indicated is only some modes that can use in the various modes of principle of the present invention.In addition, the present invention is intended to comprise all these aspects and their equivalent.
Accompanying drawing explanation
By reference to the content below in conjunction with the description of the drawings and claims, and understand more comprehensively along with to of the present invention, other object of the present invention and result will more be understood and should be readily appreciated that.In the accompanying drawings:
Fig. 1 is manual " crank weldering " method flow diagram of TIG weldering according to the embodiment of the present invention;
Fig. 2 is the schematic diagram of ceramic mouth on groove of the argon-arc welding gun according to the embodiment of the present invention;
Fig. 3 is the argon-arc welding gun angle of inclination schematic diagram according to the embodiment of the present invention;
Fig. 4 is the welding bead design sketch of manual " crank weldering " method of TIG weldering according to the embodiment of the present invention.
Label identical in all of the figs indicates similar or corresponding feature or function.
Detailed description of the invention
Below with reference to accompanying drawing, specific embodiments of the invention are described in detail.
Fig. 1 is manual " crank weldering " method flow diagram of TIG weldering according to the embodiment of the present invention, and as shown in Figure 1, manual " crank weldering " method of TIG weldering provided by the invention, comprises the steps:
S110: the inspection of equipment before weldering; Remove the foreign material within the scope of groove and each 10-20mm of both sides of edges thereof, until expose metallic luster;
S120: the tight-lipped groove that leans against of the pottery of argon-arc welding gun does the strong point;
S130: argon-arc welding gun tilts in the other direction along welding bead, and angle of inclination is approximately 130 °;
S140: left and right tiltedly swings argon-arc welding gun and draws arc welding, first carries out picture arc backing welding, after groove fuses, accelerates welding frequency to control the thin and thick of welding bead interlayer and interlayer temperature; Carry out the bigger cover welding of argon-arc welding gun oscillator arc again;
S150: after weld seam is soldered, welder checks weld appearance quality, thinning surface defect.
In the step S110 of manual " crank weldering " method of above-mentioned TIG weldering, the inspection of equipment before weldering, check that argon gas cylinder valve is with or without to leak gas and malfunctioning, whether wireway is unimpeded, and whether the instrument and meter such as current voltmeter, flowmeter is normal; Connect welding change-over switch, mix up welding current, down slope time, gas lag time, choose length change-over switch, regulate numerical value needed for argon flow amount; Perform workmen's protection and field labor protection; Tungsten bar is worn into required form, regulates tungsten electrode and stretch out nozzle length (about 3-6mm); The electric power polarity of GTAW is straight polarity direct current; Remove the foreign material such as greasy dirt, iron rust within the scope of groove and each 10-20mm of both sides of edges thereof, until expose metallic luster.
In the step S120 of manual " crank weldering " method of TIG weldering, the tight-lipped groove that leans against of the pottery of argon-arc welding gun does the strong point.Fig. 2 is the schematic diagram of ceramic mouth on groove of the argon-arc welding gun according to the embodiment of the present invention, and as shown in Figure 2, crank weldering does the strong point with tight-lipped the abutting against on groove of the pottery of argon-arc welding gun.
In the step S130 of manual " crank weldering " method of TIG weldering, argon-arc welding gun tilts in the other direction along welding bead, and angle of inclination is approximately 130 °.Fig. 3 is the argon-arc welding gun angle of inclination schematic diagram according to the embodiment of the present invention, as shown in Figure 3, argon-arc welding gun angle of inclination be approximately about 130 °.
In the step S140 of manual " crank weldering " method of TIG weldering, left and right tiltedly swings argon-arc welding gun and draws arc-welding, first carries out picture arc backing welding, after groove fuses, accelerate welding frequency to control the thin and thick of welding bead interlayer and interlayer temperature, then carry out the bigger cover welding of argon-arc welding gun oscillator arc.
In step S140, draw arc welding and be divided into backing welding and cosmetic welding; Capping layer is roughly the same with prime coat, but the radian that argon-arc welding gun swings is slightly large, is advisable to fuse groove corner angle 0.5-1mm.
In welding process, if do not control interlayer temperature, the interlayer of welding bead will be caused blocked up, overstand, thus cause burn-off phenomenon.Burning is the difficulty of the most difficult breakthrough in welding; When burning can cause downhand welding or weld in the overhead position, welding bead back is easy to the defects such as formation stays, depression.In the present embodiment, The faster the better for welding frequency, welding bead interlayer easy to control thin and thick, and layer thickness gets over Bao Yuehao, can better control interlayer temperature like this, to avoid occurring burn-off phenomenon.
In step S140, preferably to carry out in indoor in argon arc welding construction, if not at indoor construction, need special draught exclusion device.
In step S140, if when the duct thickness of welding is 3-6mm, adopt two-layer welding; When welding is interrupted, again playing weldering should 6-8mm overlapping with former weld seam, to make welding comprehensive, does not occur solder skip.
In the present embodiment, welding bead outward appearance presents trickle fish scale-shaped, silvery white, and width is consistent, and evenly, reinforcement is 0.2-0.5mm to height.Fig. 4 is the welding bead design sketch of manual " crank weldering " method of TIG weldering according to the embodiment of the present invention, and as shown in Figure 4, welding bead presents trickle cataphracted silvery white, and width is consistent, and height evenly.This welding method provided by the invention can reach good welding effect, can not only enhance productivity, and equally also can improve welding quality.
In the step S150 of manual " crank weldering " method of TIG weldering, after weld seam is soldered, welding procedure personnel inspection weld appearance quality, thinning surface defect, reduces repair rate as far as possible, makes up welding procedure defect.
Can be found out by above-mentioned embodiment, manual " crank weldering " method of TIG weldering of the present invention, defects such as traditional welding method being changed into the crank soldering method effectively controlling burning, effectively controlling welding bead back shrinkage hole by controlling burning, cave in and stay; In welding procedure, welding bead outward appearance presents trickle fish scale-shaped, silvery white, and width is consistent, and evenly, reinforcement is 0.2-0.5mm to height, and welding bead presents silvery white, and welding finished product is by X-ray examination, and qualification rate reaches more than 98 percent.
Manual " crank weldering " method of TIG weldering proposed according to the present invention is described in an illustrative manner above with reference to accompanying drawing.But, it will be appreciated by those skilled in the art that manual " crank weldering " method of TIG weldering that the invention described above is proposed, various improvement can also be made on the basis not departing from content of the present invention.Therefore, protection scope of the present invention should be determined by the content of appending claims.
Claims (4)
1. manual " crank weldering " method of TIG weldering, is characterized in that, comprise the steps:
S110: the inspection of equipment before weldering; Check that argon gas cylinder valve is with or without gas leakage and malfunctioning, whether wireway is unimpeded, and whether current voltmeter, flowmeter be normal; Connect welding change-over switch, mix up welding current, down slope time, gas lag time, choose length change-over switch, regulate numerical value needed for argon flow amount; Perform workmen's protection and field labor protection; Tungsten bar is worn into required form, and regulating tungsten electrode, to stretch out nozzle length be 3-6mm; The electric power polarity of GTAW is straight polarity direct current; Remove the foreign material within the scope of groove and each 10-20mm of both sides of edges thereof, until expose metallic luster;
S120: the tight-lipped groove that leans against of the pottery of argon-arc welding gun does the strong point;
S130: argon-arc welding gun tilts in the other direction along welding bead, and angle of inclination is 130 °;
S140: left and right tiltedly swings argon-arc welding gun and draws arc welding, first carries out picture arc backing welding, after groove fuses, accelerates welding frequency to control the thin and thick of welding bead interlayer and interlayer temperature; Carry out the bigger cover welding of argon-arc welding gun oscillator arc again; Wherein, if when the duct thickness of welding is 3-6mm, adopt two-layer welding; When welding is interrupted, again play weldering 6-8mm overlapping with former weld seam, to make welding comprehensively, do not occur solder skip;
S150: after weld seam is soldered, welder checks weld appearance quality, thinning surface defect.
2. manual " crank weldering " method of TIG weldering as claimed in claim 1, wherein, in step S140, described welding bead outward appearance presents trickle fish scale-shaped, silvery white, and width is consistent, and evenly, reinforcement is 0.2-0.5mm to height.
3. manual " crank weldering " method of TIG weldering as claimed in claim 1, wherein, in step S140, by accelerating welding frequency to control thin and thick and the interlayer temperature of described welding bead interlayer, avoids occurring burn-off phenomenon.
4. manual " crank weldering " method of TIG weldering as claimed in claim 1, wherein, in step S140, fusing groove corner angle during cover welding is 0.5-1mm.
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| CN105345222B (en) * | 2015-11-24 | 2017-08-25 | 中车唐山机车车辆有限公司 | The welding method of single face welding and double face shaping |
| CN110238554B (en) * | 2019-07-03 | 2021-08-20 | 威海鑫瑞焊接设备有限公司 | Welding gun head with auxiliary function for steam turbine welding equipment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102225486A (en) * | 2011-05-31 | 2011-10-26 | 孙洪伟 | Welding wire-free manual swing welding method |
| CN102528238A (en) * | 2012-01-18 | 2012-07-04 | 江苏中核利柏特股份有限公司 | Manual argon-arc welding process of tungsten electrode |
| CN102941397A (en) * | 2012-10-09 | 2013-02-27 | 中冶南方(武汉)威仕工业炉有限公司 | Argon tungsten arc welding method for nickel-based alloy |
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| JPS5561383A (en) * | 1978-10-27 | 1980-05-09 | Kobe Steel Ltd | Dc tig weaving welding method |
| JP3967635B2 (en) * | 2002-06-10 | 2007-08-29 | 株式会社ダイヘン | TIG arc welding method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102225486A (en) * | 2011-05-31 | 2011-10-26 | 孙洪伟 | Welding wire-free manual swing welding method |
| CN102528238A (en) * | 2012-01-18 | 2012-07-04 | 江苏中核利柏特股份有限公司 | Manual argon-arc welding process of tungsten electrode |
| CN102941397A (en) * | 2012-10-09 | 2013-02-27 | 中冶南方(武汉)威仕工业炉有限公司 | Argon tungsten arc welding method for nickel-based alloy |
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