CN102513657A - Argon arc welding method for pipe welding and auxiliary device used in method - Google Patents
Argon arc welding method for pipe welding and auxiliary device used in method Download PDFInfo
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- CN102513657A CN102513657A CN2011103911741A CN201110391174A CN102513657A CN 102513657 A CN102513657 A CN 102513657A CN 2011103911741 A CN2011103911741 A CN 2011103911741A CN 201110391174 A CN201110391174 A CN 201110391174A CN 102513657 A CN102513657 A CN 102513657A
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Abstract
The invention discloses an argon arc welding method for pipe welding. The method comprises the following steps of: abutting joint two pipes to be welded together at a welding port, and remaining a gap to form a welding seam; installing end covers on non-welding ports of the two pipes,, wherein one of the end covers is provided with an air vent or air pipe; before welding, continuously introducing argon gas along the air vent or air port, and discharging other air in the pipes through the welding seam; and after introducing the argon gas to the pipes for a period of time, beginning to weld by using argon tungsten-arc welding, and continuously introducing argon gas during carrying out backing weld. The scheme has the advantages that the argon gas is introduced to the pipes before welding and in the welding process, therefore, the inner surface of the welding seam can be prevented from being oxidized, meanwhile, the reinforcement is reduced, and the welding quality is ensured.
Description
Technical field
The present invention relates to a kind of argon arc welding welding method of suitable body welding and the servicing unit that this method is used.
Background technology:
Argon tungsten-arc welding is all adopted in the welding of some fluid hydraulic tubes (oil pipe, water pipe) interface.Inert gas shielding during welding is provided by welding gun fully, the air free flow of hydraulic fluid pipe two ends.Because the pipeline welding particularity must adopt single face welding and double face shaping, argon tungsten-arc welding can meet the demands preferably.Owing to can not liner be set in the fluid hose inboard, so welding operation is had relatively high expectations: the too thin crackle that then occurs easily of bottoming layer, too thick then liquid state of molten pool metal can make the bigger irregular reinforcement of the inboard generation of weld seam under the stress effect during backing welding; And because inner chamber place air, the weld seam inner surface also has a large amount of oxide skins to exist.Under the condition that satisfies hydraulic fluid pipe mechanical property; If the inboard reinforcement of weld seam is excessive and have a large amount of oxide skins; Its internal diameter is reduced; In the long-time use of hydraulic tube, assemble slag and impurity in a lot of fluids easily, cause it under design pressure, often can not reach theoretical delivery (, more obvious) the influence of its use particularly at the turning of complex space position.Improving pressure then can make hydraulic fluid that circular weld (reinforcement place) and tube wall are formed bigger impulsive force and internal stress; The joint quality of the position that is easy to generate defective (inner because the component segregation fault location like weld metal zone and heat affected area or hydraulic tube) is descended, also reduce service life, serviceability and the safety coefficient of hydraulic fluid pipe simultaneously.
Summary of the invention
First purpose of the present invention is to provide a kind of can reduce weld defect, improves joint performance and then improves the argon arc welding welding method of a kind of suitable body welding of its service life and serviceability.
The argon arc welding welding method of a kind of suitable body welding provided by the invention, step is following:
Two bodys that will weld together are docked in weld port, and retention gap forms weld seam;
With loading onto end cap, one of them end cap has a passage or breather pipe with the non-weld port of two bodys;
Before beginning welding, constantly feed argon gas, other air in the body are discharged by weld seam along passage or blow vent;
Feed argon gas in the body after a period of time, begin, constantly feed argon gas during the backing welding welding with the argon tungsten-arc welding welding.
The shortest time that feeds argon gas before the above-mentioned welding is by formula t=π D
2L/4Q calculates, and wherein t is a duration of ventilation, and D is an ips, two sections tube length after the L butt joint, and Q is a flow.
Further, in the process of welding,, suitably regulate the flow that feeds argon gas in the body along with the minimizing of weld seam area.
The purity of argon of importing in the above-mentioned welding process is 99.99%.
The advantage of this programme is:
One, before welding and in the welding process, in body, imports argon gas, can prevent the oxidation of weld seam inner surface, guarantee welding quality.
Two, in welding process; The argon gas of certain flow is discharged in weld seam, and the liquid metal of girth joint prime coat molten bath being located fusion has produced certain, uniform pressure, makes that the prime coat moulding is relatively more even and has offset part gravity; Reduced reinforcement, the internal diameter of weld can obviously not reduce.
Second purpose of the present invention is to provide a kind of body argon arc welding auxiliary welding equipment, in body, imports argon gas so that before the body welding, reach in the welding process, can prevent the oxidation of weld seam inner surface, reduces reinforcement, guarantees welding quality.
A kind of body argon arc welding auxiliary welding equipment provided by the invention; It is characterized in that comprising two bodys that will weld together, be used for two end caps of closed tube port; And argon gas output device; Described two bodys dock in weld port, and retention gap forms weld seam, and one of them end cap has a passage or breather pipe; Described two end cap is installed in the non-weld port of two bodys respectively, and the argon gas output port of argon gas output device docks with an end cap passage or breather pipe.
Description of drawings
Fig. 1 is the argon tungsten-arc welding welding figure of hydraulic tube under the conventional method.
Hydraulic tube argon tungsten-arc welding welding sketch map under Fig. 2 the present invention.
Fig. 3 is the local A enlarged drawing of Fig. 2.
The specific embodiment
Two hydraulic fluid pipes 1 that are of convenient length, material is preferably low carbon-structural steel, adopts suitable technology to manage in port assemblies butt joint two, and must leave root gap, and the median in the gap length taking technique scope is for well.The locus is for being preferably flat butt joint; Two socket cover 2 (6) are installed in two non-weld port of pipe respectively, and one of them end cap 2 has a passage, are connected with the efferent duct 3 of argon gas output device; This pipe is preferably copper tube; The diameter in the hole on its diameter and the socket cover is suitable, is used for argon gas is imported body, and inner air tube is then discharged by the root gap of weld.Feed the pressure gauge control of argon flow amount by the argon bottle place.Begin should feed purity>=99.99% argon gas a period of time earlier before the welding, the shortest time can be by formula t=π D
2L/4Q (t: duration of ventilation D: ips L: tube length Q: flow; Unit of account converts according to international unit) estimate; The back adopts semi-automatic argon tungsten-arc welding to begin welding; To observe when beginning to weld and dissolve drip a form and regulate and feed the body argon flow amount, with the molten bath can take shape in groove root place uniformly and do not sink, presentation is pore-free and oxide skin exists, can form even dissolution pore when welding is advisable.Root forming defect in the gas regulation process will be polished, again welding.Require to adopt multi-pass welding 8, the wire brush polishing is adopted in the welding bead cleaning.The liquid metal that argon gas is located fusion to girth joint prime coat 4 molten baths in the pipe when welding has produced certain, uniform pressure; Make that prime coat 4 moulding are very even and offset part gravity; Reduced reinforcement 5; Experimental stage can be cut open with vernier scale and measure reinforcement 5, generally in the 0.5-1.5mm scope, has significantly relatively before and reduces.
Claims (6)
1. the argon arc welding welding method of a suitable body welding, step is following:
Two bodys that will weld together are docked in weld port, and retention gap forms weld seam;
With loading onto end cap, one of them end cap has a passage or breather pipe with the non-weld port of two bodys;
Before beginning welding, constantly feed argon gas, other air in the body are discharged by weld seam along passage or blow vent;
Feed argon gas in the body after a period of time, begin, constantly feed argon gas during the backing welding welding with the argon tungsten-arc welding welding.
2. the argon arc welding welding method of a kind of suitable body welding according to claim 1 is characterized in that: the shortest time that feeds argon gas before the welding is by formula t=π D
2L/4Q calculates, and wherein t is a duration of ventilation, and D is an ips, two sections tube length after the L butt joint, and Q is a flow.
3. the argon arc welding welding method of a kind of suitable body welding according to claim 1 and 2 is characterized in that: in the process of welding, along with the minimizing of weld seam area, suitably regulate the flow that feeds argon gas in the body.
4. the argon arc welding welding method of a kind of suitable body welding according to claim 1 and 2; To observe when it is characterized in that beginning to weld and dissolve drip a form and come the adjustments of gas flow, can take shape in uniformly with the molten bath that do not sink in groove root place, presentation is pore-free and oxide skin exists, can form even dissolution pore when welding is advisable.
5. the argon arc welding welding method of a kind of suitable body welding according to claim 1 and 2, it is characterized in that: the purity of argon of importing in the welding process is 99.99%.
6. body argon arc welding auxiliary welding equipment that is applicable to the said welding method of claim 1～5; It is characterized in that comprising two bodys that will weld together, be used for two end caps of closed tube port; And argon gas output device; Described two bodys dock in weld port, and retention gap forms weld seam, and one of them end cap has a passage or breather pipe; Described two end cap is installed in the non-weld port of two bodys respectively, and the argon gas output port of argon gas output device docks with an end cap passage or breather pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103911741A CN102513657A (en) | 2011-11-30 | 2011-11-30 | Argon arc welding method for pipe welding and auxiliary device used in method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103911741A CN102513657A (en) | 2011-11-30 | 2011-11-30 | Argon arc welding method for pipe welding and auxiliary device used in method |
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| CN102513657A true CN102513657A (en) | 2012-06-27 |
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| CN2011103911741A Pending CN102513657A (en) | 2011-11-30 | 2011-11-30 | Argon arc welding method for pipe welding and auxiliary device used in method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103182590A (en) * | 2012-09-29 | 2013-07-03 | 北京航星机器制造公司 | Method for controlling reverse penetration into back of aluminium alloy pipeline during welding |
| CN103331538A (en) * | 2013-07-10 | 2013-10-02 | 陈孟元 | Copper tube nitrogen charging and welding method and nitrogen charging and welding control device |
| CN106425045A (en) * | 2016-10-28 | 2017-02-22 | 共享铸钢有限公司 | Welding method of big-wall-thickness and small-pipe-diameter pipe fittings |
| CN106573324A (en) * | 2014-08-07 | 2017-04-19 | 高准公司 | Method of and apparatus for controlling weld penetration profile with application of shielding gas in inner region of workpiece |
| CN109352180A (en) * | 2018-12-06 | 2019-02-19 | 哈尔滨工业大学 | A kind of compound sealing method of edge joint laser-electric arc of internal pressurization |
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| JPH1024367A (en) * | 1996-07-08 | 1998-01-27 | Mitsubishi Heavy Ind Ltd | Shield jig used for welding and shielding method |
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| CN201333599Y (en) * | 2009-01-22 | 2009-10-28 | 中国化学工程第三建设有限公司 | Protective gas sealing device in a pipeline welding pipe |
| CN202356775U (en) * | 2011-11-30 | 2012-08-01 | 广新海事重工股份有限公司 | Auxiliary device for welding tubes by argon arc welding |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH1024367A (en) * | 1996-07-08 | 1998-01-27 | Mitsubishi Heavy Ind Ltd | Shield jig used for welding and shielding method |
| JPH10258362A (en) * | 1996-10-21 | 1998-09-29 | M Ii Gijutsu Kenkyusho:Kk | Device spatially isolating necessary section within tube |
| JPH1133783A (en) * | 1997-07-18 | 1999-02-09 | Mitsubishi Heavy Ind Ltd | Shielding jig for internal shield welding and gas sheilding method |
| CN1810429A (en) * | 2006-02-16 | 2006-08-02 | 苏州工业园区华焊科技有限公司 | Automatic pipe butt welding method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103182590A (en) * | 2012-09-29 | 2013-07-03 | 北京航星机器制造公司 | Method for controlling reverse penetration into back of aluminium alloy pipeline during welding |
| CN103182590B (en) * | 2012-09-29 | 2015-11-25 | 北京航星机器制造公司 | A kind of aluminium alloy pipeline that controls welds the anti-saturating method in back |
| CN103331538A (en) * | 2013-07-10 | 2013-10-02 | 陈孟元 | Copper tube nitrogen charging and welding method and nitrogen charging and welding control device |
| CN106573324A (en) * | 2014-08-07 | 2017-04-19 | 高准公司 | Method of and apparatus for controlling weld penetration profile with application of shielding gas in inner region of workpiece |
| CN106425045A (en) * | 2016-10-28 | 2017-02-22 | 共享铸钢有限公司 | Welding method of big-wall-thickness and small-pipe-diameter pipe fittings |
| CN109352180A (en) * | 2018-12-06 | 2019-02-19 | 哈尔滨工业大学 | A kind of compound sealing method of edge joint laser-electric arc of internal pressurization |
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Application publication date: 20120627 |