CN101745725B - Electromagnetic direct-drive high-speed three-wire magnetic-field compound flux copper-gasket submerged arc welding device and method thereof - Google Patents

Abstract

The invention discloses an electromagnetic direct-drive high-speed three-wire magnetic-field compound flux copper-gasket submerged arc welding device and a method thereof. The device comprises a wire feed system, a welding power source, a magnetic field power source, a copper gasket system, a torch system, an electromagnetic compound system and a numerical control system, wherein the wire feed system is formed by integrating the rotor of the electromagnetic direct-drive rotating servomotor and the main wire feed rolls into an integral body; the torch system comprises an eccentric current contact nozzle which is divided into an upper part and a lower part; the electromagnetic compound system is integrated with the nozzle of the torch system and a water cooling system into an integral body; and the copper gasket system is an air-pressure copper-gasket one-side-welding double-side one-step molding system, the back side of which uses flux. The invention can cancel the mechanical transmission link between the traditional motor and the wire feed rolls, greatly enhances the wire feed stability and the control response precision, and eliminates the noise, oil sludge and vibration, thereby realizing the three-wire high-speed electromagnetic compound submerged arc welding one-side-welding double-side molding high-efficiency welding method. The method has the advantages of simple structure, small size, high stability and reliability, and precise numerical control, and can be used for welding huge and thick plates.

Description

Electromagnetic direct-drive high-speed three-wire magnetic-field compound flux copper-gasket submerged arc welding device and method thereof

Technical field

The present invention relates to welding field, particularly a kind of electromagnetic direct-drive high-speed three-wire magnetic-field compound flux copper-gasket submerged arc welding novel device and welding method thereof.

Background technology

Along with China's rapid development of economy; the needs that need develop at a high speed at many industrial circles, efficient and high-quality solder technology satisfy nation-building; the progress of related discipline science and technology simultaneously; impelled modern welding new method constantly to occur; speed of welding improves constantly; welding quality requires also to improve thereupon, and in addition, sustainable development, environmental protection also progressively improve the requirement of solder technology.

The submerged arc welding technology is that present China is applied to low-alloy high-strength steel, slab, long slab and welds one of most important solder technology, uses very extensive in fields such as building, boats and ships, pressure vessel, electric power, chemical industry, heavy-duty machineries.In recent years, mariages or the application of multiplewire submerged arc welding technology in above-mentioned field make its welding quality and welding efficiency be greatly improved, and have opened up a new welding technology field.But at present, still there are many shortcomings in traditional monofilament, mariages or multiplewire submerged arc welding connection technology:

1) welding joint mechanical property, particularly impact flexibility has much room for improvement;

2) the weld heat input restriction is strict, has limited the advantage of multiplewire submerged arc welding connection technology;

3) weld procedure specification is narrower;

4) weldering of mariages or multifibres causes weld metal crystal grain thick easily, pore, segregation, be mingled with, defective such as undercut is more;

5) speed of welding and welding efficiency also have much room for improvement;

6) welding material, outstanding as the environmental issue of solder flux, welding slag;

7) owing to adopt mechanisms such as turbine and worm transmission, gear reduction, make welding gun and welding equipment heaviness, bulky, multifibres welding equipment complex structure has influenced arranging of many welding wires, is unfavorable for using operating difficulties.

Therefore, need further to improve and development submerged arc welding device and technology, particularly multiplewire submerged arc welding connect equipment and welding method,, high-quality efficient to realize, novel multiplewire submerged arc welding connects equipment and development of technology cheaply.

Summary of the invention

The objective of the invention is to provide that a kind of slab is efficient at the deficiencies in the prior art, high-quality, low-cost three high speeds, efficient submerged arc welding device and method, so that break through the limitation of traditional submerged arc welding device and method, and to the harsh requirement of welding condition, the realization impact property is good, and the multiplewire submerged arc welding of big electric current, high-speed, high efficiency, high-quality welded joint connects.

In view of this, the present invention adopts the electromagnetic direct-drive servomotor, by mechanical transmission mechanisms such as the turbine and worm between cancellation wire feed drive motors and the wire feed system, gear reductions, realizes the zero transmission between motor and the wire feed rolls, can finish high speed wire feed task; Effect at electromagnetic complex field realizes Electromagnetic Control submerged arc welding process, has obtained the distinct advantages of electromagnetic action submerged arc welding under the big welding current service condition; Simultaneously, organically combine with the efficient solder technology of flux copper-gasket single face welding and double face shaping, realize the high-quality moulding of weld seam positive and negative, under the support of digital power and Numeric Control Technology, realized efficient, high-quality, at a high speed, three submerged arc welding devices and new method thereof cheaply.

It is as follows that the present invention solves the concrete scheme that its technical problem adopts:

The electromagnetic direct-drive high-speed three-wire magnetic-field compound flux copper-gasket submerged arc welding device comprises wire feed system, the source of welding current, magnetic field power supply, flux copper-gasket system, torch system, electromagnetism hybrid system, digital control system.

Further, described wire feed system is that rotating shaft and the main wire feed rolls I of the electromagnetic direct-drive rotating servo motor I of welding wire I becomes one, by single wire feed rolls I pair to finishing wire feed, rotating shaft and the main wire feed rolls II of the electromagnetic direct-drive rotating servo motor II of welding wire II become one, the two-pack that is made of directive wheel I that is arranged in the bottom and main wire feed rolls II is to finishing wire feed, rotating shaft and the main wire feed rolls III of the electromagnetic direct-drive rotating servo motor III of welding wire III become one, and the two-pack that is made of directive wheel II that is arranged in top and main wire feed rolls III is to finishing wire feed;

Further, described torch system comprises eccentric ignition tip I, eccentric ignition tip II and eccentric ignition tip III, eccentric ignition tip I is made of the first half and the latter half, and eccentric ignition tip II is made of the first half and the latter half, and eccentric ignition tip III is made of the first half and the latter half;

Further, described electromagnetism hybrid system comprises taper magnet exciting coil, side plate, cover plate, following water inlet, upper water-out mouth, winding wire mouth, nozzle, the water-cooling system of electromagnetism hybrid system and torch system become one, add the electromagnetic field effect welding region by the field power supply generation, control welding arc and molten bath, eliminate the electromagnetism blow in the welding process, improve the joint total quality of welding;

Further, described flux copper-gasket system comprises inflated hose, copper lining, liner solder flux, for being positioned over the vapour-pressure type flux copper-gasket system of back of weld, it is the uniform liner solder flux of spreading thickness on copper pad, and feed tracheae with compressed air, the copper pad that applies good solder flux is attached to the back side of weld seam with certain pressure;

Further, the directive wheel I of described wire feed system is arranged in main wire feed rolls III, same main shaft, directive wheel I is connected by bearing with main shaft, directive wheel II is arranged in main wire feed rolls II, same main shaft, directive wheel II is connected by bearing with main shaft, main wire feed rolls I main shaft is positioned at the centre position of main wire feed rolls II main shaft, main wire feed rolls III main shaft, being the space isosceles triangle arranges, servomotor II and servomotor III are arranged above and below in a side, and servomotor I is arranged in opposite side centre position, compact conformation;

Further, described welding wire I is preposition welding wire; Welding wire II and welding wire III are arranged side by side, and are positioned at the back of welding wire I, are isosceles triangle between welding wire I and welding wire II, the welding wire III and distribute, and three root bead silks are finished the function that welding process is filled weld metal jointly; Welding wire I bears the function of the preceding bottoming of weldering, the preheating of weld seam initial stage and postwelding capping, and can finish the welding in interstage with welding wire II and welding wire III;

Further, the gathering sill surface of described directive wheel I and directive wheel II is smooth, and the gathering sill surface of main wire feed rolls II and main wire feed rolls III is coarse decorative pattern lines, helps increasing wire feed frictional force, improves feeding stability;

Further, described wire feed system comprises clamp mechanism and preceding thread plate, and it is right that wire feed rolls and corresponding with it pinch wheels constitute the wire feed wheel set, and pinch wheels makes welding wire closely contact with wire feed rolls, guarantee that welding wire can send to smoothly, preceding thread plate stretches out the guiding welding wire and penetrates the welding wire guide hole very easily.

Further, the first half of described eccentric ignition tip I is connected by internal and external threads with the latter half, be convenient to dismounting and replacing, the first half has off-centre to a certain degree when being connected with the latter half, formed eccentric ignition tip, guaranteed that welding wire I contacts with the good of ignition tip, and the first half is longer, adopt more cheap Cu alloy material, so just saved the chromium zirconium copper material of the costliness of half approximately, the latter half is shorter, adopts electric conductivity and the good chromium zirconium copper material of wearability, is convenient to endoporus fine finishining, reach best conductive effect, conductive clip I links to each other with eccentric ignition tip I, and is independent of welding wire I provides welding current, and eccentric ignition tip I links to each other with torch body by insulation locating support I;

Further, the first half of described eccentric ignition tip II is connected by internal and external threads with the latter half, be convenient to dismounting and replacing, the first half has off-centre to a certain degree when being connected with the latter half, formed eccentric ignition tip, guaranteed that welding wire II contacts with the good of ignition tip, and the first half is longer, adopts more cheap Cu alloy material, so just saved the chromium zirconium copper material of the costliness of half approximately, the latter half is shorter, adopts electric conductivity and the good chromium zirconium copper material of wearability, is convenient to endoporus fine finishining, reach best conductive effect, conductive clip II links to each other with eccentric ignition tip II, independently provides welding current for welding wire II

The first half of described eccentric ignition tip III is connected by internal and external threads with the latter half, be convenient to dismounting and replacing, the first half has off-centre to a certain degree when being connected with the latter half, formed eccentric ignition tip, guaranteed that welding wire III contacts with the good of ignition tip, and the first half is longer, adopt more cheap Cu alloy material, so just saved the chromium zirconium copper material of the costliness of half approximately, the latter half is shorter, adopts electric conductivity and the good chromium zirconium copper material of wearability, be convenient to endoporus fine finishining, reach best conductive effect, conductive clip III links to each other with eccentric ignition tip III, independently provides welding current for welding wire III;

Further, eccentric ignition tip II links to each other with torch body by insulation locating support II, eccentric ignition tip III links to each other with torch body by insulation locating support III, insulation locating support II and insulation locating support III are arranged in together, mutual insulating, also mutually insulated between eccentric ignition tip II and the eccentric ignition tip III has guaranteed that the welding current between welding wire II and the welding wire III is separate, does not disturb mutually;

Further, conductive clip selects for use brass to do material, and the heat that has a resistance during welding is less, and the brass conductive folder is convenient to processing and better economy;

Further, ignition tip has the transition taper hole, makes intermediate location level and smooth, and the dead turning of no transition makes welding wire once mounting finish the work efficiency height;

Further, the length of conduction aperture is longer than general conductive hole length in the ignition tip, guaranteed the contact distance of welding wire with ignition tip, improved electric conductivity, prevent outage, electric arc shakiness and haircuts phenomenon effectively, improved the abrasion resistance of ignition tip simultaneously, welding wire can carry out electric preheating in advance, helps welding.

Further, the magnet exciting coil of described electromagnetism hybrid system is the taper magnet exciting coil of up big and down small structure, big magnetic field, little periphery, generation center, peripheral little distribution adapts with the welding current center is big, form rational electromagnetic force at welding region, control welding arc, welding pool, Welding Metallurgy overall process form quality weld;

Further, described electromagnetism hybrid system provides exciting current by magnetic field power supply, and the generation both forward and reverse directions alternately changes, positive back pulse does not wait amplitude, the weak vertical rotating excitation field of pulse of strong gap alternating polarity all around in center;

Further, the magnet exciting coil of described electromagnetism hybrid system is immersed in the cooling medium, and insulate with cooling medium, cooling medium enters from the following water inlet that is positioned at the nozzle below, flow out from the upper water-out mouth of the cover plate that is positioned at nozzle top, guarantee that like this nozzle, magnet exciting coil have good cooling effect, be applicable to the big electric current welding of submerged arc, simultaneously compact conformation, simple effective, reliable operation.

Further, described copper lining system is the welding system of flux copper-gasket single face welding and double face shaping, and the liner solder flux directly contacts with back of work, under the liner solder flux copper lining is arranged, under the jacking supporting role of inflated hose, the solder flux liner is close to back of work, the size, particularly reinforcement of control back bead, use big welding current, can form back bead, and also tolerant for its allowed band of variation of groove precision and welding condition, reliable welding quality.

Electromagnetic direct-drive high-speed three-wire magnetic-field compound flux copper-gasket buried arc welding method, the high-efficiency high-quality buried arc welding method of three high speed electromagnetic compound flux copper-gaskets of digital control type single face welding and double face shaping comprises that three efficient welding, high-speed welding, electromagnetism composite welding, flux copper-gasket single face welding and double face shaping efficiently weld, the function and the effect of advanced digital control welding;

Further, three efficient welding manners of described digital control type are under the support of electromagnetic direct-drive rotating servo motor, machine driving link between having cancelled from the motor to the wire feed system, carry out zero transmission mode, all under the digital control pattern of electrical quantity, realize the wire feed of quick and stable, and respond fast and feedback regulation wire feed state according to the actual welding situation, independent mutually between the three root bead silks, establish one's own system, can carry out the coordinated movement of various economic factors and adjusting according to the welding needs again simultaneously, welding wire I feels secure before bearing weldering, during the function of preheating of weld seam initial stage and postwelding capping, provide the direct current welding current by source of welding current I, welding wire II provides welding current by source of welding current II, and welding wire III provides welding current by source of welding current III, three root bead silks are the equilateral triangle arrangement mode, welding wire I is preceding, welding wire II and welding wire III and be listed in after, finish the function of filling weld seam jointly, realize bottoming, preheating, capping, the one step completed efficient welding of joint filling can high efficiency be finished thick plates; Three root bead silks are totally one molten bath; Perhaps welding wire I is a molten bath, and welding wire II and welding wire III be another molten bath altogether; Perhaps three root bead silks independently are three molten baths;

Further, described high-speed welding mode is at three, big electric current, the support of high speed wire feed realizes high-speed welding down, three root bead silks are not only independent but also cooperate, can set wire feed rate respectively, realize the combined type wire feeding mode, and carry out the adjusting of single welding wire feeding speed according to welding sequence, realize the high-speed three-wire welding process, welding wire II is consistent with the wire feed rate of welding wire III, welding wire I is from the main regulation wire feed rate, and cooperates welding wire II and welding wire III to weld, and high-speed welding speed is 0.6m/min-5m/min, welding current is 400-1200A, and gage of wire is 1.2mm-6.4mm;

Further, described electromagnetism composite welding mode is at the taper magnet exciting coil, under the support of field power supply, form outer close interior dredging, the both forward and reverse directions Variable Polarity, do not wait vertical rotating excitation field of amplitude, can eliminate arc blow or attraction under welding wire I direct current+welding wire II direct current+welding wire III direct current combination condition, enlarge the electric arc area simultaneously, the rotation of control welding arc, need not to swing the not fusion that just can eliminate groove or weld edge, and the metallurgical process of setting of control welding pool and weld seam, fully stir welding pool, the crystalline condition of control weld metal impels the weld grain refinement, reduce chemical inhomogeneities, reduce the sensitiveness of pore, reduce pore, slag inclusion, the undercut defective, the toughness plasticity and the erosion-resisting ability of raising weld seam, form quality weld, electromagnetism composite welding exciting current 10-50A, Variable Polarity excitation frequency 1-25Hz, dutycycle 30%-70%, luffing is than 10%-50%, and interior external diameter magnetic field intensity is than being 20%-60%;

Further, the advantage that the efficient welding manner of described flux copper-gasket single face welding and double face shaping has fully utilized welding flux backing and copper lining forms, the liner solder flux is powdery before solidifying, be close to back of work, after solidifying, heat fused make back of weld force to be shaped, solder flux is the solder flux of the ultralow hydrogen environmental protection of high tenacity of nanometer coating, carry out submerged arc welding in the workpiece front, obtain the weld seam of one side welding with back formation, efficient welding slab or long slab, can eliminate back side motlten metal flows out, defectives such as seaming, the size, particularly reinforcement of control back bead can be used big electric current, excursion requirement for groove precision and welding condition is less, thereby realizes the high-quality and efficient welding of high tenacity;

Further, the digital control welding manner of described advanced person is all to adopt digital power at source of welding current I, II, III and field power supply, wire feed system adopts under the condition of electromagnetic direct-drive servomotor zero transmission, whole welding system and welding procedure control all are advanced digital control models, have remote monitoring, remote control and data transmission capabilities, the close-loop control mode of realizing quick response, even running, timely adjustment carries out omnibearing automatic control to each link of whole welding process, guarantees to obtain high-quality welded joint.

Further, described digital source of welding current I, II, III can be respectively separately for welding wire I, welding wire II provide the direct current welding current with welding wire III, exchange welding current, pulse welding current, Variable Polarity pulse welding current, dipulse welding current; Described digital excitation power supply can provide DC excitation electric current, AC excitation electric current, pulsed field magnetization electric current, Variable Polarity excitation pulse welding current, dipulse exciting current for magnet exciting coil.

Beneficial effect of the present invention is mainly reflected in following aspect:

1) electromagnetic direct-drive rotating servo motor zero drive mechanism form: increased substantially feeding stability and control response precision, noise, greasy dirt and vibration have been eliminated, realized simple in structure, volume is little, reliable and stable, accurate controlled high speed wire feed, also make simultaneously the design of three wire bond rifles become very simple, compact conformation, the welding wire spread pattern is abundant, and spatial distribution is enough multiple, can either establish one's own system between each welding wire, can coordinate mutually again.

2) electromagnetic complex field: by both forward and reverse directions alternately change, the vertical rotating excitation field control of pulse welding arc, welding pool and the weld seam process of setting of positive back pulse strong gap alternating polarity around not waiting a little less than amplitude, the center, the welding pool melt is fully stirred, improve the crystalline condition of welding pool metal, change the distribution in welding process of setting and temperature field, cause the change of microstructure, phase structure, impel the weld grain refinement, reduce chemical inhomogeneities, reduce the sensitiveness of pore, make weld seam and heat affected area intensity thereof approach the intensity of mother metal; Eliminate the electromagnetism blow in the welding process, enlarge the electric arc area simultaneously, the rotation of control welding arc need not to swing the not fusion that just can eliminate groove or weld edge.

3) the flux copper-gasket single face welding and double face shaping efficiently welds: the advantage that has fully utilized welding flux backing and copper lining, the liner solder flux is close to back of work, make back of weld force to be shaped, solder flux is the solder flux of the ultralow hydrogen environmental protection of high tenacity of nanometer coating, carry out submerged arc welding in the workpiece front, obtain the weld seam of one side welding with back formation; At efficient welding slab or long slab, can eliminate defectives such as back side motlten metal outflow, seaming, the size of control back bead, reinforcement particularly, can use big electric current, less for the excursion requirement of groove precision and welding condition, thus realize the high-quality and efficient welding of high tenacity.

4) three arrangement modes: three root bead silks are the equilateral triangle arrangement mode, welding wire I is preceding, welding wire II and welding wire III and be listed in after, finish the function of filling weld seam jointly, realize bottoming, preheating, capping, the one step completed efficient welding of joint filling, can high efficiency finish thick plates.

5) eccentric ignition tip and two halves structure up and down: ignition tip the first half is connected by internal and external threads with the latter half, be convenient to dismounting and replacing, the first half has off-centre to a certain degree when being connected with the latter half, guaranteed that welding wire contacts with the good of ignition tip, the first half is longer, adopt more cheap Cu alloy material, so just saved the chromium zirconium copper material of the costliness of half approximately, the latter half is shorter, adopt electric conductivity and the good chromium zirconium copper material of wearability, be convenient to endoporus fine finishining, reach best conductive effect, conductive clip links to each other with eccentric ignition tip, independently provides welding current for welding wire; Three root bead silks can use dissimilar welding currents, form interchange, the multiple combination of direct current.

6) the wire feed wheel set is right: the two-pack that welding wire II and III are made of directive wheel that is arranged in the bottom and main wire feed rolls can be realized the stable feeding of thick welding wire to finishing wire feed, improves joint filling efficient and deposition efficiency; Three root bead silks can use different diameters.

7) Xian Jin digital control welding manner: the source of welding current and field power supply all adopt digital power, wire feed system adopts under the condition of electromagnetic direct-drive servomotor zero transmission, whole welding system and welding procedure control all are advanced digital control models, have remote monitoring, remote control and data transmission capabilities, the close-loop control mode of realizing quick response, even running, timely adjustment carries out omnibearing automatic control to each link of whole welding process, guarantees to obtain high-quality welded joint.

8) integrated water-cooling system: the magnet exciting coil of electromagnetism hybrid system is immersed in the cooling medium, and insulate with cooling medium, cooling medium enters from the following water inlet that is positioned at the nozzle below, flow out from the upper water-out mouth of the cover plate that is positioned at nozzle top, guarantee that like this nozzle, magnet exciting coil have good cooling effect, be applicable to the big electric current welding of submerged arc, simultaneously compact conformation, simple effective, reliable operation.

9) of many uses: as to be used for the welding of slab, super large slab, overlength plate; Be used for the welding of low-alloy high-strength steel, heat resisting steel, ultrafort steel, common stainless steel, two phase stainless steel; The welding of bevel and square groove; Narrow gap welding connects etc.; Speed of welding is fast, the welding efficiency height has efficient, low cost, high-quality, high stability, many applicabilities, multimode, the comprehensive easily characteristics of the advanced slab submerged-arc welding of control, has realized effective coordination and unification rationally efficient, high-quality, reduce production cost, improved competitiveness of product; Solved the contradiction restriction between welding efficiency and the welding thickness of slab, two-sided welding one-shot forming, device structure is simple, cost is lower, and control is reliable, good stability, and the weldquality height is easy to promote the use of.

The present invention is in shipbuilding, and the manufacturing and the equipment field of industry critical components such as boiler, oil, smelting and heavy-duty machinery have wide application value and development prospect, have realized the innovation of slab multiplewire submerged arc welding connection technology.

Description of drawings

Fig. 1 is a welding wire I welding equipment schematic diagram of the present invention;

Fig. 2 is welding wire II of the present invention and welding wire III welding equipment schematic diagram;

Fig. 3 is three position views of the present invention;

Fig. 4 is copper lining welding equipment of the present invention and welding method schematic diagram;

Among the figure, 1. welding wire I guide hole; 2. welding wire II guide hole; 3. welding wire III guide hole; 4. servomotor I; 5. gathering sill; 6. main wire feed rolls I; 7. shaft joint I; 8. gripper shoe; 9. locating support I insulate; 10. ignition tip I the first half; 11. ignition tip I the latter half; 12. conductive clip I; 13. side plate; 14. coil; 15. delivery port; 16. cover plate; 17. water inlet; 18. winding wire mouth; 19. casing; 20. servomotor II; 21. shaft joint II; 22. main wire feed rolls II; 23. directive wheel II; 24. preceding thread plate; 25. servomotor III; 26. shaft joint III; 27. directive wheel I; 28. main wire feed rolls III; 29. ignition tip II the first half; 30. ignition tip II the latter half; 31. ignition tip III the first half; 32. ignition tip III the latter half; 33. insulation locating support II; 34. insulation locating support III; 35. conductive clip III; 36. conductive clip II; 37. nozzle; 38. welding wire I; 39. welding wire II; 40. welding wire III; 41. nozzle inner walls; 42. workpiece; 43. inflated hose; 44. copper lining; 45. surperficial solder flux; 46. front slag; 47. liner solder flux; 48. back slag; 49. groove; 50. molten bath; 51. source of welding current I; 52. source of welding current II; 53. source of welding current III; 54. externally-applied magnetic field.

The specific embodiment

The present invention will be further described below in conjunction with accompanying drawing and embodiment.

One. the electromagnetic direct-drive high-speed three-wire magnetic-field compound flux copper-gasket submerged arc welding device

A kind of electromagnetic direct-drive high-speed three-wire magnetic-field compound flux copper-gasket submerged arc welding device, concrete structure is as follows:

Referring to Fig. 1, Fig. 2, Fig. 3, Fig. 4, the electromagnetic direct-drive high-speed three-wire magnetic-field compound flux copper-gasket submerged arc welding device comprises wire feed system, the source of welding current, magnetic field power supply, flux copper-gasket system, torch system, electromagnetism hybrid system, digital control system;

Described wire feed system is that rotating shaft and the main wire feed rolls I6 of the electromagnetic direct-drive rotating servo motor I4 of welding wire I38 becomes one, by single wire feed rolls I pair to finishing wire feed, rotating shaft and the main wire feed rolls II22 of the electromagnetic direct-drive rotating servo motor II20 of welding wire II39 become one, the two-pack that is made of directive wheel I27 that is arranged in the bottom and main wire feed rolls II22 is to finishing wire feed, rotating shaft and the main wire feed rolls III28 of the electromagnetic direct-drive rotating servo motor III25 of welding wire III40 become one, and the two-pack that is made of directive wheel II23 that is arranged in top and main wire feed rolls III28 is to finishing wire feed;

Described torch system comprises eccentric ignition tip I, eccentric ignition tip II and eccentric ignition tip III, eccentric ignition tip I is made of the first half 10 and the latter half 11, eccentric ignition tip II is made of the first half 29 and the latter half 30, and eccentric ignition tip III is made of the first half 31 and the latter half 32;

Described electromagnetism hybrid system comprises taper magnet exciting coil 14, side plate 13, cover plate 16, following water inlet 17, upper water-out mouth 15, winding wire mouth 18, the nozzle 37 of electromagnetism hybrid system and torch system, water-cooling system become one, add the electromagnetic field effect welding region by the field power supply generation, control welding arc and molten bath, eliminate the electromagnetism blow in the welding process, improve the joint total quality of welding;

Described flux copper-gasket system comprises inflated hose 43, copper lining 44, liner solder flux 47, for being positioned over the vapour-pressure type flux copper-gasket system of back of weld, it is the uniform liner solder flux of spreading thickness on copper pad, and feed tracheae with compressed air, the copper pad that applies good solder flux is attached to the back side of weld seam with certain pressure;

The directive wheel I27 of described wire feed system is arranged in main wire feed rolls III28, same main shaft, directive wheel I27 is connected by bearing with main shaft, directive wheel II23 is arranged in main wire feed rolls II22, same main shaft, directive wheel II23 is connected by bearing with main shaft, main wire feed rolls I6 main shaft is positioned at the centre position of main wire feed rolls II22 main shaft, main wire feed rolls III28 main shaft, being the space isosceles triangle arranges, servomotor II20 and servomotor III25 are arranged above and below in a side, servomotor I4 is arranged in opposite side centre position, compact conformation;

Described welding wire I38 is preposition welding wire; Welding wire II39 and welding wire III40 are arranged side by side, and are positioned at the back of welding wire I38, are isosceles triangle between welding wire I38 and welding wire II39, the welding wire III40 and distribute, and three root bead silks are finished the function that welding process is filled weld metal jointly; Welding wire I38 bears the function of the preceding bottoming of weldering, the preheating of weld seam initial stage and postwelding capping, and can finish the welding in interstage with welding wire II39 and welding wire III40;

The gathering sill surface of described directive wheel I27 and directive wheel II23 is smooth, and the gathering sill surface of main wire feed rolls II22 and main wire feed rolls III28 is coarse decorative pattern lines, helps increasing wire feed frictional force, improves feeding stability;

Described wire feed system comprises clamp mechanism and preceding thread plate 24, it is right that wire feed rolls and corresponding with it pinch wheels constitute the wire feed wheel set, pinch wheels makes welding wire closely contact with wire feed rolls, guarantees that welding wire can send to smoothly, and preceding thread plate 24 stretches out the guiding welding wire and penetrates the welding wire guide hole very easily.

The first half 10 of described eccentric ignition tip I and the latter half 11 are connected by internal and external threads, be convenient to dismounting and replacing, the first half 10 has off-centre to a certain degree when being connected with the latter half 11, formed eccentric ignition tip, guaranteed that welding wire I38 contacts with the good of ignition tip 11, and the first half 10 is longer, adopt more cheap Cu alloy material, so just saved the chromium zirconium copper material of the costliness of half approximately, the latter half 11 is shorter, adopt electric conductivity and the good chromium zirconium copper material of wearability, be convenient to endoporus fine finishining, reach best conductive effect, conductive clip I12 links to each other with eccentric ignition tip I, independent of welding wire I38 provides welding current, eccentric ignition tip I links to each other with torch body by insulation locating support I9;

The first half 29 of described eccentric ignition tip II and the latter half 30 are connected by internal and external threads, be convenient to dismounting and replacing, the first half 29 has off-centre to a certain degree when being connected with the latter half 30, formed eccentric ignition tip, guaranteed that welding wire II39 contacts with the good of ignition tip 30, and the first half 29 is longer, adopt more cheap Cu alloy material, so just saved the chromium zirconium copper material of the costliness of half approximately, the latter half 30 is shorter, adopt electric conductivity and the good chromium zirconium copper material of wearability, be convenient to endoporus fine finishining, reach best conductive effect, conductive clip II36 links to each other with eccentric ignition tip II, independently provide welding current for welding wire II39

The first half 31 of described eccentric ignition tip III and the latter half 32 are connected by internal and external threads, be convenient to dismounting and replacing, the first half 31 has off-centre to a certain degree when being connected with the latter half 32, formed eccentric ignition tip, guaranteed that welding wire III40 contacts with the good of ignition tip 32, and the first half 31 is longer, adopt more cheap Cu alloy material, so just saved the chromium zirconium copper material of the costliness of half approximately, the latter half 32 is shorter, adopts electric conductivity and the good chromium zirconium copper material of wearability, be convenient to endoporus fine finishining, reach best conductive effect, conductive clip III35 links to each other with eccentric ignition tip III, independently provides welding current for welding wire III40;

Eccentric ignition tip II links to each other with torch body by insulation locating support II33, eccentric ignition tip III links to each other with torch body by insulation locating support III34, insulation locating support II33 and insulation locating support III34 are arranged in together, mutual insulating, also mutually insulated between eccentric ignition tip II and the eccentric ignition tip III, guaranteed that the welding current between welding wire II39 and the welding wire III40 is separate, do not disturbed mutually;

Conductive clip I12, conductive clip III35, conductive clip II36 select for use brass to do material, and the heat that has a resistance during welding is less, and the brass conductive folder is convenient to processing and better economy;

Ignition tip I11, ignition tip II30, ignition tip III32 have the transition taper hole, make intermediate location level and smooth, and the dead turning of no transition makes welding wire once mounting finish the work efficiency height;

The length of conduction aperture is longer than general conductive hole length among ignition tip I11, ignition tip II30, the ignition tip III32, guaranteed the contact distance of welding wire with ignition tip, improved electric conductivity, prevent outage, electric arc shakiness and haircuts phenomenon effectively, improved the abrasion resistance of ignition tip simultaneously, welding wire can carry out electric preheating in advance, helps welding.

The magnet exciting coil 14 of described electromagnetism hybrid system is the taper magnet exciting coil of up big and down small structure, big magnetic field, little periphery, generation center, peripheral little distribution adapts with the welding current center is big, form rational electromagnetic force at welding region, control welding arc, welding pool, Welding Metallurgy overall process form quality weld;

Described electromagnetism hybrid system provides exciting current by magnetic field power supply, and the generation both forward and reverse directions alternately changes, positive back pulse does not wait amplitude, the weak vertical rotating excitation field of pulse of strong gap alternating polarity all around in center;

The magnet exciting coil of described electromagnetism hybrid system is immersed in the cooling medium, and insulate with cooling medium, cooling medium enters from the following water inlet 17 that is positioned at nozzle 37 belows, flow out from the upper water-out mouth 15 of the cover plate 16 that is positioned at nozzle 37 tops, guarantee that like this nozzle 37, magnet exciting coil 14 have good cooling effect, be applicable to the big electric current welding of submerged arc, simultaneously compact conformation, simple effective, reliable operation.

Described copper lining system is the welding system of flux copper-gasket single face welding and double face shaping, liner solder flux 47 directly contacts with workpiece 42 back sides, the liner solder flux has copper lining 44 47 times, and under the jacking supporting role of inflated hose 43, the solder flux liner is close to workpiece 42 back sides, the size of control back bead, particularly reinforcement uses big welding current, can form back bead, and also tolerant for its allowed band of variation of groove precision and welding condition, reliable welding quality.

Two. electromagnetic direct-drive high-speed three-wire magnetic-field compound flux copper-gasket buried arc welding method

The high-efficiency high-quality buried arc welding method of three high speed electromagnetic compound flux copper-gaskets of digital control type single face welding and double face shaping comprises that three efficient welding, high-speed welding, electromagnetism composite welding, flux copper-gasket single face welding and double face shaping efficiently weld, the function and the effect of advanced digital control welding;

Three efficient welding manners of described digital control type are under the support of electromagnetic direct-drive rotating servo motor, machine driving link between having cancelled from the motor to the wire feed system, carry out zero transmission mode, all under the digital control pattern of electrical quantity, realize the wire feed of quick and stable, and respond fast and feedback regulation wire feed state according to the actual welding situation, independent mutually between the three root bead silks, establish one's own system, can carry out the coordinated movement of various economic factors and adjusting according to the welding needs again simultaneously, welding wire I38 feels secure before bearing weldering, during the function of preheating of weld seam initial stage and postwelding capping, provide the direct current welding current by source of welding current I51, welding wire II39 provides welding current by source of welding current II52, welding wire III40 provides welding current by source of welding current III53, and three root bead silks are the equilateral triangle arrangement mode, and welding wire I38 is preceding, welding wire II39 and welding wire III40 and be listed in after, finish the function of filling weld seam jointly, realize bottoming, preheating, capping, the one step completed efficient welding of joint filling can high efficiency be finished thick plates;

Described high-speed welding mode is at three, big electric current, the support of high speed wire feed realizes high-speed welding down, three root bead silks are not only independent but also cooperate, can set wire feed rate respectively, realize the combined type wire feeding mode, and carry out the adjusting of single welding wire feeding speed according to welding sequence, realize the high-speed three-wire welding process, welding wire II is consistent with the wire feed rate of welding wire III, welding wire I is from the main regulation wire feed rate, and cooperate welding wire II and welding wire III to weld, high-speed welding speed is 0.6m/min-5m/min, and welding current is 400-1200A, and gage of wire is 1.2mm-6.4mm;

Described electromagnetism composite welding mode is at taper magnet exciting coil 14, under the support of field power supply, form outer close interior dredging, the both forward and reverse directions Variable Polarity, do not wait vertical rotating excitation field of amplitude, can eliminate arc blow or attraction under welding wire I direct current+welding wire II direct current+welding wire III direct current combination condition, enlarge the electric arc area simultaneously, the rotation of control welding arc, need not to swing the not fusion that just can eliminate groove or weld edge, and the metallurgical process of setting of control welding pool and weld seam, fully stir welding pool, the crystalline condition of control weld metal, impel the weld grain refinement, reduce chemical inhomogeneities, reduce the sensitiveness of pore, reduce pore, slag inclusion, the undercut defective, improve the toughness plasticity and the erosion-resisting ability of weld seam, form quality weld, electromagnetism composite welding exciting current 10-50A, Variable Polarity excitation frequency 1-25Hz, dutycycle 30%-70%, luffing are than 10%-50%, and interior external diameter magnetic field intensity is than being 20%-60%;

The advantage that the efficient welding manner of described flux copper-gasket single face welding and double face shaping has fully utilized welding flux backing and copper lining forms, the liner solder flux is powdery before solidifying, be close to workpiece 42 back sides, after solidifying, heat fused make back of weld force to be shaped, solder flux is the solder flux of the ultralow hydrogen environmental protection of high tenacity of nanometer coating, carry out submerged arc welding in the workpiece front, obtain the weld seam of one side welding with back formation, efficient welding slab or long slab, can eliminate back side motlten metal flows out, defectives such as seaming, the size of control back bead, reinforcement particularly, can use big electric current, less for the excursion requirement of groove precision and welding condition, thus realize the high-quality and efficient welding of high tenacity;

The digital control welding manner of described advanced person is all to adopt digital power at source of welding current I, II, III and field power supply, wire feed system adopts under the condition of electromagnetic direct-drive servomotor zero transmission, whole welding system and welding procedure control all are advanced digital control models, have remote monitoring, remote control and data transmission capabilities, the close-loop control mode of realizing quick response, even running, timely adjustment carries out omnibearing automatic control to each link of whole welding process, guarantees to obtain high-quality welded joint.

Three. specific embodiment:

Following embodiment implements according to welding method provided by the invention and equipment.

Example 1: electromagnetic direct-drive high-speed three-wire magnetic-field compound flux copper-gasket submerged arc welding thickness of slab is the 16MnR steel of 30mm, joint adopts Y type groove, fit-up gap 1mm, the joint end face adopts machining smooth smooth, the greasy dirt and the moisture of preweld cleaning joint end face, and dry, back of weld adopts CaF2-MgO-CaO-Al2O3 slag system high-strength steel sintered flux, flux copper-gasket single face welding and double face shaping technology; Adopt welding wire I to feel secure and weld and cover welding, its direct current welding current is 1200A, and exciting current is 20A, and field frequency is 20Hz, and welding wire II and welding wire III are 850A for the direct current welding current, gage of wire 4mm, speed of welding 1.5m/min.

During actual welding, according to different welding procedures, quality of parent material, welding material and joint form etc., adopt buried arc welding method provided by the invention and equipment, should take all factors into consideration the reasonable coupling of various welding conditions, and main technologic parameters is optimized, can guarantee the enforcement of efficient, high-quality, low cost new submerged arc welding process.Explanation is at last, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not breaking away from the aim and the scope of technical solution of the present invention, it all should be encompassed in the claim scope of the present invention.

Claims (6)

1. an electromagnetic direct-drive high-speed three-wire magnetic-field compound flux copper-gasket submerged arc welding device is characterized in that: comprise wire feed system, the source of welding current, magnetic field power supply, flux copper-gasket system, torch system, electromagnetism hybrid system, digital control system;

Described wire feed system is that rotating shaft and the main wire feed rolls I (6) of the electromagnetic direct-drive rotating servo motor I (4) of welding wire I (38) becomes one, by single wire feed rolls I pair to finishing wire feed, rotating shaft and the main wire feed rolls II (22) of the electromagnetic direct-drive rotating servo motor II (20) of welding wire II (39) become one, the two-pack that is made of the directive wheel I (27) that is arranged in the bottom and main wire feed rolls II (22) is to finishing wire feed, rotating shaft and the main wire feed rolls III (28) of the electromagnetic direct-drive rotating servo motor III (25) of welding wire III (40) become one, and the two-pack that is made of the directive wheel II (23) that is arranged in top and main wire feed rolls III (28) is to finishing wire feed;

Described torch system comprises eccentric ignition tip I, eccentric ignition tip II and eccentric ignition tip III, eccentric ignition tip I is made of the first half I (10) and the latter half I (11), eccentric ignition tip II is made of the first half II (29) and the latter half II (30), and eccentric ignition tip III is made of the first half III (31) and the latter half III (32);

Described electromagnetism hybrid system comprises taper magnet exciting coil (14), side plate (13), cover plate (16), following water inlet (17), upper water-out mouth (15), winding wire mouth (18), the nozzle of electromagnetism hybrid system and torch system (37), water-cooling system become one, add the electromagnetic field effect welding region by the field power supply generation, control welding arc and molten bath, eliminate the electromagnetism blow in the welding process, improve the joint total quality of welding;

Described flux copper-gasket system comprises inflated hose (43), copper lining (44), liner solder flux (47), for being positioned over the vapour-pressure type flux copper-gasket system of back of weld, it is the uniform liner solder flux of spreading thickness on copper pad, and feed tracheae with compressed air, the copper pad that applies good solder flux is attached to the back side of weld seam with certain pressure.

2. electromagnetic direct-drive high-speed three-wire magnetic-field compound flux copper-gasket submerged arc welding device according to claim 1, it is characterized in that: the directive wheel I (27) of described wire feed system is arranged in main wire feed rolls III (28), same main shaft, directive wheel I (27) is connected by bearing with main shaft, directive wheel II (23) is arranged in main wire feed rolls II (22), same main shaft, directive wheel II (23) is connected by bearing with main shaft, main wire feed rolls I (6) main shaft is positioned at main wire feed rolls II (22) main shaft, the centre position of main wire feed rolls III (28) main shaft, being the space isosceles triangle arranges, servomotor II (20) and servomotor III (25) are arranged above and below in a side, servomotor I (4) is arranged in opposite side centre position, compact conformation;

Described welding wire I (38) is preposition welding wire; Welding wire II (39) and welding wire III (40) are arranged side by side, and are positioned at the back of welding wire I (38), are isosceles triangle between welding wire I (38) and welding wire II (39), the welding wire III (40) and distribute, and three root bead silks are finished the function that welding process is filled weld metal jointly; Welding wire I (38) bears the function of the preceding bottoming of weldering, the preheating of weld seam initial stage and postwelding capping, and can finish the welding in interstage with welding wire II (39) and welding wire III (40);

The gathering sill surface of described directive wheel I (27) and directive wheel II (23) is smooth, and the gathering sill surface of main wire feed rolls II (22) and main wire feed rolls III (28) is coarse decorative pattern lines, helps increasing wire feed frictional force, improves feeding stability;

Described wire feed system comprises clamp mechanism and preceding thread plate (24), it is right that wire feed rolls and corresponding with it pinch wheels constitute the wire feed wheel set, pinch wheels makes welding wire closely contact with wire feed rolls, guarantees that welding wire can send to smoothly, and preceding thread plate (24) stretches out the guiding welding wire and penetrates the welding wire guide hole very easily.

3. electromagnetic direct-drive high-speed three-wire magnetic-field compound flux copper-gasket submerged arc welding device according to claim 1, it is characterized in that: the first half I of described eccentric ignition tip I (10) is connected by internal and external threads with the latter half I (11), be convenient to dismounting and replacing, the first half I (10) and the latter half I (11) have off-centre to a certain degree when being connected, formed eccentric ignition tip, guaranteed good the contacting of welding wire I (38) with ignition tip I (11), and the first half I (10) is longer, adopt more cheap Cu alloy material, so just saved the chromium zirconium copper material of the costliness of half approximately, the latter half I (11) is shorter, adopt electric conductivity and the good chromium zirconium copper material of wearability, be convenient to endoporus fine finishining, reach best conductive effect, conductive clip I (12) links to each other with eccentric ignition tip I, independently provides welding current for welding wire I (38), and eccentric ignition tip I links to each other with torch body by insulation locating support I (9);

The first half II of described eccentric ignition tip II (29) is connected by internal and external threads with the latter half II (30), be convenient to dismounting and replacing, the first half II (29) and the latter half II (30) have off-centre to a certain degree when being connected, formed eccentric ignition tip, guaranteed good the contacting of welding wire II (39) with ignition tip II (30), and the first half II (29) is longer, adopt more cheap Cu alloy material, so just saved the chromium zirconium copper material of the costliness of half approximately, the latter half II (30) is shorter, adopt electric conductivity and the good chromium zirconium copper material of wearability, be convenient to endoporus fine finishining, reach best conductive effect, conductive clip II (36) links to each other with eccentric ignition tip II, independently provide welding current for welding wire II (39)

The first half III of described eccentric ignition tip III (31) is connected by internal and external threads with the latter half III (32), be convenient to dismounting and replacing, the first half III (31) and the latter half III (32) have off-centre to a certain degree when being connected, formed eccentric ignition tip, guaranteed good the contacting of welding wire III (40) with ignition tip III (32), and the first half III (31) is longer, adopt more cheap Cu alloy material, so just saved the chromium zirconium copper material of the costliness of half approximately, the latter half III (32) is shorter, adopt electric conductivity and the good chromium zirconium copper material of wearability, be convenient to endoporus fine finishining, reach best conductive effect, conductive clip III (35) links to each other with eccentric ignition tip III, independently provides welding current for welding wire III (40);

Eccentric ignition tip II links to each other with torch body by insulation locating support II (33), eccentric ignition tip III links to each other with torch body by insulation locating support III (34), insulation locating support II (33) and insulation locating support III (34) are arranged in together, mutual insulating, also mutually insulated between eccentric ignition tip II and the eccentric ignition tip III, guaranteed that the welding current between welding wire II (39) and the welding wire III (40) is separate, do not disturbed mutually;

Conductive clip I, II, III (12,36,35) select for use brass to do material, and the heat that has a resistance during welding is less, and the brass conductive folder is convenient to processing and better economy;

Ignition tip I, II, III (11,30,32) have the transition taper hole, make intermediate location level and smooth, and the dead turning of no transition makes welding wire once mounting finish the work efficiency height;

The length of conduction aperture is longer than general conductive hole length among ignition tip I, II, the III (11,30,32), guaranteed the contact distance of welding wire with ignition tip, improved electric conductivity, prevent outage, electric arc shakiness and haircuts phenomenon effectively, improved the abrasion resistance of ignition tip simultaneously, welding wire can carry out electric preheating in advance, helps welding.

4. electromagnetic direct-drive high-speed three-wire magnetic-field compound flux copper-gasket submerged arc welding device according to claim 1, it is characterized in that: the magnet exciting coil of described electromagnetism hybrid system (14) is the taper magnet exciting coil of up big and down small structure, big magnetic field, little periphery, generation center, peripheral little distribution adapts with the welding current center is big, form rational electromagnetic force at welding region, control welding arc, welding pool, Welding Metallurgy overall process form quality weld;

Described electromagnetism hybrid system provides exciting current by magnetic field power supply, and the generation both forward and reverse directions alternately changes, positive back pulse does not wait amplitude, the weak vertical rotating excitation field of pulse of strong gap alternating polarity all around in center;

The magnet exciting coil of described electromagnetism hybrid system is immersed in the cooling medium, and insulate with cooling medium, cooling medium enters from the following water inlet (17) that is positioned at nozzle (37) below, flow out from the upper water-out mouth (15) of the cover plate (16) that is positioned at nozzle (37) top, guarantee that like this nozzle (37), magnet exciting coil (14) have good cooling effect, be applicable to the big electric current welding of submerged arc, simultaneously compact conformation, simple effective, reliable operation.

5. electromagnetic direct-drive high-speed three-wire magnetic-field compound flux copper-gasket submerged arc welding device according to claim 1, it is characterized in that: described copper lining system is the welding system of flux copper-gasket single face welding and double face shaping, liner solder flux (47) directly contacts with workpiece (42) back side, copper lining (44) is arranged under the liner solder flux (47), under the jacking supporting role of inflated hose (43), the solder flux liner is close to workpiece (42) back side, the size and the reinforcement of control back bead, use big welding current, can form back bead, and also tolerant for its allowed band of variation of groove precision and welding condition, reliable welding quality.

6. electromagnetic direct-drive high-speed three-wire magnetic-field compound flux copper-gasket buried arc welding method, it is characterized in that: the high-efficiency high-quality buried arc welding method of three high speed electromagnetic compound flux copper-gaskets of digital control type single face welding and double face shaping comprises the function and the effect of three efficient welding manners of digital control type, high-speed welding mode, electromagnetism composite welding mode, the efficient welding manner of flux copper-gasket single face welding and double face shaping, advanced digital control welding manner;

Three efficient welding manners of described digital control type are under the support of electromagnetic direct-drive rotating servo motor, machine driving link between having cancelled from the motor to the wire feed system, carry out zero transmission mode, all under the digital control pattern of electrical quantity, realize the wire feed of quick and stable, and respond fast and feedback regulation wire feed state according to the actual welding situation, independent mutually between the three root bead silks, establish one's own system, can carry out the coordinated movement of various economic factors and adjusting according to the welding needs again simultaneously, welding wire I (38) feels secure before bearing weldering, during the function of preheating of weld seam initial stage and postwelding capping, provide the direct current welding current by source of welding current I (51), welding wire II (39) provides welding current by source of welding current II (52), welding wire III (40) provides welding current by source of welding current III (53), three root bead silks are the equilateral triangle arrangement mode, welding wire I (38) is preceding, welding wire II (39) and welding wire III (40) and be listed in after, finish the function of filling weld seam jointly, realize bottoming, preheating, capping, the one step completed efficient welding of joint filling can high efficiency be finished thick plates;

Described high-speed welding mode is at three, big electric current, the support of high speed wire feed realizes high-speed welding down, three root bead silks are not only independent but also cooperate, can set wire feed rate respectively, realize the combined type wire feeding mode, and carry out the adjusting of single welding wire feeding speed according to welding sequence, realize the high-speed three-wire welding process, welding wire II is consistent with the wire feed rate of welding wire III, welding wire I is from the main regulation wire feed rate, and cooperate welding wire II and welding wire III to weld, high-speed welding speed is 0.6m/min-5m/min, and welding current is 400-1200A, and gage of wire is 1.2mm-6.4mm;

Described electromagnetism composite welding mode is in taper magnet exciting coil (14), under the support of field power supply, form outer close interior dredging, the both forward and reverse directions Variable Polarity, do not wait vertical rotating excitation field of amplitude, can eliminate arc blow or attraction under welding wire I direct current+welding wire II direct current+welding wire III direct current combination condition, enlarge the electric arc area simultaneously, the rotation of control welding arc, need not to swing the not fusion that just can eliminate groove or weld edge, and the metallurgical process of setting of control welding pool and weld seam, fully stir welding pool, the crystalline condition of control weld metal, impel the weld grain refinement, reduce chemical inhomogeneities, reduce the sensitiveness of pore, reduce pore, slag inclusion, the undercut defective, improve the toughness plasticity and the erosion-resisting ability of weld seam, form quality weld, electromagnetism composite welding exciting current 10-50A, Variable Polarity excitation frequency 1-25Hz, dutycycle 30%-70%, luffing are than 10%-50%, and interior external diameter magnetic field intensity is than being 20%-60%;

The advantage that the efficient welding manner of described flux copper-gasket single face welding and double face shaping has fully utilized welding flux backing and copper lining forms, the liner solder flux is powdery before solidifying, be close to workpiece (42) back side, after solidifying, heat fused make back of weld force to be shaped, solder flux is the solder flux of the ultralow hydrogen environmental protection of high tenacity of nanometer coating, carry out submerged arc welding in the workpiece front, obtain the weld seam of one side welding with back formation, efficient welding slab or long slab, can eliminate back side motlten metal flows out, the seaming defective, the size and the reinforcement of control back bead, can use big electric current, excursion requirement for groove precision and welding condition is less, thereby realizes the high-quality and efficient welding of high tenacity;

The digital control welding manner of described advanced person is all to adopt digital power at source of welding current I, II, III and field power supply, wire feed system adopts under the condition of electromagnetic direct-drive servomotor zero transmission, whole welding system and welding procedure control all are advanced digital control models, have remote monitoring, remote control and data transmission capabilities, the close-loop control mode of realizing quick response, even running, timely adjustment carries out omnibearing automatic control to each link of whole welding process, guarantees to obtain high-quality welded joint.

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