CN102896399A - Super-narrow-gap electric arc welding device for butting steel rails - Google Patents
Super-narrow-gap electric arc welding device for butting steel rails Download PDFInfo
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- CN102896399A CN102896399A CN201210406133XA CN201210406133A CN102896399A CN 102896399 A CN102896399 A CN 102896399A CN 201210406133X A CN201210406133X A CN 201210406133XA CN 201210406133 A CN201210406133 A CN 201210406133A CN 102896399 A CN102896399 A CN 102896399A
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Abstract
The invention discloses a super-narrow-gap electric arc welding device for butting steel rails. The steel rails (12) are fixed on positioning blocks (11) under a fixed plate (10) through a pair of C-shaped clamp forceps (2); one end of a clamp is contacted with the tread planes and the guide planes of the steel rails through a horizontal plane, and the other end of the clamp is contacted with the tread planes and the guide planes of the steel rails by a cylindrical plane; the centering of the steel rails (12) is ensured by the two positioning blocks (11); a guide rail for driving a welding gun (13) to move is installed on the fixed plate (10); the welding gun (13) is fixed on a horizontal slide block (3) and moves horizontally through a horizontal guide rail (9) during a welding process; after one steel rail is welded, the height of the welding gun is adjusted by adjusting an adjusting handle (6) on a vertical guide rail according to the height of a weld bead; and a welding flux piece (15) put at the root of a groove is kept in adhesion to a side wall and the root of the groove.
Description
Technical field
[0001] the present invention relates to the ultra-narrow gap welder, be applicable to the Site Welding of track bond.
Background technology
Along with the construction of high-speed railway, the production of gapless rail and Site Welding become an important job.Be subject to the Restricted requirements such as transportation, generally speaking, the rail welding that rail welding factory will lack becomes the long rail of 180～500 m, then is transported to site welding and is connected into gapless track.
At present, the Site Welding of rail mainly contains following several welding method: mobile flash butt welding, gas pressure welding, arc welding, exothermic welding.Flash butt welding is to utilize butt welding machine that the welded piece solder side is contacted, and by the heavy current of low-voltage, then metal deliquescing under the effect of resistance heat applies axial upset force fast, forms banjo fixing butt jointing; Gas pressure welding is to utilize the flame heating, makes the welded piece welding joint softened, then applies axial upset force and obtains butt joint; There are two kinds of manual electric arc welding and automatic arc weldings arc welding present stage, is to weld groove width 15 ~ 20 mm after rail is opened larger groove; Exothermic welding is that the liquid metal that utilizes thermit reaction to form is filled weld seam, and joint microstructure is as cast condition, and joint mechanical property is relatively poor.
Affect a width that key factor is the heat affected area of track bond joint quality.Several track bond method ubiquity heat inputs of more than introducing are large, the wider problem in mother metal heat affected area.The heat affected area can make the joint reduction, causes rail contact-making surface local dent in the rail use procedure, causes judder and noise, reduces rail life, affects the security of operation of locomotive.
Summary of the invention
[0003] the purpose of this invention is to provide a kind of ultra-narrow gap arc welding connection device for track bond.
The ultra-narrow gap arc welding connection device that is used for track bond, vertical guide rail 7 is fixed on the fixed head 10, horizontal guide rail is connected on the vertical slipper 8 by a detachable block, welding gun 13 is fixed on the cross sliding clock 3, rail 12 is fixed on the locating piece 11 below the fixed head 10 by C clamp pincers 2, anchor clamps one end and rail tread and spigot surface are by plane contact, and the other end is by Cylindrical Surfaces Contact, and two locating pieces 11 can guarantee the centering of rail 12; To drive guide rails assembling that welding gun 13 moves on fixed head 10, welding gun 13 is fixed on the cross sliding clock 3, and welding gun 13 carries out horizontal movement by horizontal guide rail 9 in the welding process, whenever be soldered together after, according to bead height, by regulating the height of the regulating handle 6 adjustment welding guns on the vertical guide rail; The solder flux sheet 15 that is positioned over the root of groove keeps fitting with sidewall and groove root.
The beneficial effect that the present invention and background technology relatively have is: the described ultra-narrow gap arc welding technology of utilizing, have the I shape groove of ultra-narrow gap, and groove width 4 ~ 5 mm, weld heat input is little, and the welding process power consumption is few.Because heat input is low, and the weld seam cooling velocity is fast, the mother metal heat affected area only is 1 ~ 2 mm, has effectively reduced the problem of joint reduction, makes the strength character of joint keep higher level, with the joint of the strong couplings such as conventional mild steel weldinmg rod can obtain.The described solder flux sheet that uses in welding process can guarantee the smooth combustion of electric arc in the welding process, guarantees to obtain good joint mechanical property carrying out the low_input_power welding under the I shape groove of ultra-narrow gap.Because groove is narrow, weld seam filling metal is few, saves cost.This welding method cooperates general gas metal-arc welding equipment to use, and device is simple, the Site Welding that can carry out easily track bond.
Description of drawings
Fig. 1 is the whole assembling of the present invention schematic diagram, and Fig. 2 is the local enlarged diagram at I position among Fig. 1, and Fig. 3 is the structural representation of welding gun, Fig. 4 be B-B among Fig. 3 to cutaway view, Fig. 5 is the state diagram that the solder flux sheet is not put into groove, Fig. 6 is that the solder flux sheet is put into the later state of groove, Reference numeral and corresponding name are called: 1. stepper motor, 2. C clamp pincers, 3. cross sliding clock, 4. wire feed rolls, 5. welding wire, 6. horizontal guide rail height regulating handle, 7. vertical guide rail, 8. vertical slipper, 9. horizontal guide rail, 10. fixed head, 11. locating pieces, 12. rail, 13. welding gun, 14. weld seam, 15. solder flux sheets, 16. pikestaffs, 17. tabular conductive plate, 18. tabular support plate, 19. ignition tips, 20. ceramic briquettings, 21. fixture block, 22. rivet, 23. solder flux, 24. metal carriers.
The specific embodiment
As shown in Figure 1 and Figure 2, vertical guide rail 7 is fixed on the fixed head 10, horizontal guide rail is connected on the vertical slipper 8 by a detachable block, welding gun 13 is fixed on the cross sliding clock 3, rail 12 is fixed on the locating piece 11 below the fixed head 10 by C clamp pincers 2, anchor clamps one end and rail tread and spigot surface are by plane contact, and the other end is by Cylindrical Surfaces Contact, and two locating pieces 11 can guarantee the centering of rail 12; To drive guide rails assembling that welding gun 13 moves on fixed head 10, welding gun 13 is fixed on the cross sliding clock 3, and welding gun 13 carries out horizontal movement by horizontal guide rail 9 in the welding process, whenever be soldered together after, according to bead height, by regulating the height of the regulating handle 6 adjustment welding guns on the vertical guide rail; The solder flux sheet 15 that is positioned over the root of groove keeps fitting with sidewall and groove root.
As shown in Figure 3, Figure 4, welding gun 13 can be connected on the wire leading pipe of general gas metal-arc welding equipment, insulate with insulating materials between tabular support plate 18 and the pikestaff 16, and 5 of welding wires insulate with ceramic briquetting 20, with insulating tape conductive plate 17 and the seal wire air guide steel pipe that is stuck in conductive plate 17 grains are wrapped; Welding gun support plate 18 and conductive plate 17 are fastenedly connected with welding gun handle 16, and support plate 18 has certain predeformation, and welding wire 5 is applied certain clamping force.Contact with ceramic briquetting 20 by fixture block 21 between support plate 18 and the welding wire 5, fixture block 21 usefulness rivets 22 are fixed on the stainless steel protection cover; The length of ignition tip 19 is stretched out conductive plate 17 certain-lengths after installation.Install protective cover additional at the welding gun head, protective cover two-layerly is made of inside and outside, and internal layer is high-temperature insulation material, and skin is the stainless steel thin slice; Protective cover is connected by support plate with welding gun, and by keeping insulation between high-temperature insulation material, ceramic briquetting 20 and the rifle body.
As shown in Figure 5, solder flux sheet 15 is comprised of elastic metallic supporting member 24 and the superincumbent solder flux 23 of compacting.Solder flux 23 is compressed on the inboard of metal carrier 24.The solder flux sheet 15 usefulness benders that press behind the solder flux are pressed into structure shown in Figure 5, after being shaped the solder flux sheet up and down width put into the later structure as shown in Figure 6 of groove all above groove width.
Specific implementation process is: before the welding, the rust cleaning of polishing in head 30～40 mm scopes to rail 12, with existing rail pulling device rail 12 is pulled to suitable position, and adjustment groove shape becomes I shape groove, then the backing plate that the backing welding of burn-oning in the groove bottom is used, to carrying out even preheating in rail joint part 80～100 mm scopes, preheat temperature is 380～500 ℃.By C clamp pincers 2 rail 12 is fixed on the locating piece 11, water-cooled copper block is fixed on the rail of weld seam both sides by fixture, solder flux sheet 15 is positioned over the groove root, regulate the height of welding gun 13 by regulating horizontal guide rail height regulating handle 6 and put to the suitable welding position that rises, in water-cooled copper block, pass into cooling water.With pre-set control program input control device, opening power, controller sends and controls signal to power supply, wire-feed motor and stepper motor 1, and control welding gun translational speed, wire feed rate and whole welding position are put.After one weld seam finished, horizontal guide rail 9 is connected welding gun 13 to be taken off together, regulating horizontal guide rail height regulating handle 6 heightens vertical slipper 8 a certain amount of, take off water-cooled copper block, slag in the trimming and residual solder flux band, change suitable water-cooled copper block and new solder flux sheet 15 after the polishing, and adjust welding conditions, descend together welding.
The source of welding current of the present invention is the common gas metal-arc welding power supply of flat characteristic, and wlding uses the H08Mn2Si welding wire, and gage of wire is 1.6 mm, and when the weldment steel grade changed, welding wire can be adjusted according to actual needs.The welding condition that adopts is: welding current 190～270 A, and arc voltage 21～28 V, speed of welding 7～12 mm/s are adjusted it according to the different numbers of plies in the welding, and concrete welding condition is as shown in table 1.
Table 1 steel rail welding parameter
| ? | Welding current (A) | Weldingvoltage (U) | Speed of welding (mm/s) |
| Backing welding | 200～220 | 21.6 ～26.4 | 7.47～9.13 |
| Fill weldering | 250～270 | 21.6 ～26.4 | 9.48～11.58 |
| Cosmetic welding | 220～240 | 22.5～27.5 | 8.28～10.12 |
Claims (3)
1. the ultra-narrow gap arc welding connection device that is used for track bond, vertical guide rail 7 is fixed on the fixed head (10), horizontal guide rail is connected on the vertical slipper (8) by a detachable block, welding gun (13) is fixed on the cross sliding clock (3), it is characterized in that rail (12) is fixed on the following locating piece (11) of fixed head (10) by C clamp pincers (2), anchor clamps one end and rail tread and spigot surface pass through plane contact, the other end is by Cylindrical Surfaces Contact, and two locating pieces (11) can guarantee the centering of rail (12); To drive the mobile guide rails assembling of welding gun (13) on fixed head (10), welding gun (13) is fixed on the cross sliding clock (3), welding gun in the welding process (13) carries out horizontal movement by horizontal guide rail (9), whenever after being soldered together, according to bead height, by regulating the height of regulating handle (6) the adjustment welding gun on the vertical guide rail; The solder flux sheet (15) that is positioned over the root of groove keeps fitting with sidewall and groove root.
2. the ultra-narrow gap arc welding connection device for track bond according to claim 1; it is characterized in that board-like welding gun (13) mainly is comprised of pikestaff (16), tabular conductive plate (17), tabular support plate (18), wedge shape conducting block (19), protective cover; welding wire (5) is by passing in the middle of tabular conductive plate (17) and the support plate (18); insulate by insulating materials between support plate (18) and the pikestaff (16); and insulate by refractory ceramics (20) between welding wire (5); in tabular conductive plate (17) bottom, wedge shape ignition tip (19) is installed.
3. the ultra-narrow gap arc welding connection device for track bond according to claim 1, it is characterized in that solder flux sheet (15) is placed in the groove, solder flux sheet (15) is made of resilient metal carrier (24) and the superincumbent solder flux of compacting (23), metal carrier (24) mid portion is converted into the circular arc of epirelief, two edge circular arc protrusion direction be converted into center line at angle, solder flux (23) is compressed on the inboard on metal carrier both sides by binding agent, and solder flux sheet (15) stably is placed in the groove by the elastic deformation energy on metal carrier (24) circular arc portion and both sides.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210406133.XA CN102896399B (en) | 2012-10-23 | 2012-10-23 | Super-narrow-gap electric arc welding device for butting steel rails |
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| CN201210406133.XA CN102896399B (en) | 2012-10-23 | 2012-10-23 | Super-narrow-gap electric arc welding device for butting steel rails |
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| CN102896399A true CN102896399A (en) | 2013-01-30 |
| CN102896399B CN102896399B (en) | 2014-10-08 |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104175038A (en) * | 2014-09-10 | 2014-12-03 | 山东丰汇设备技术有限公司 | Device and method for automatically welding box beam |
| CN104289795A (en) * | 2014-09-22 | 2015-01-21 | 武汉纳瑞格智能设备有限公司 | MAG/MIG automatic welding device and method |
| CN105200876A (en) * | 2015-08-28 | 2015-12-30 | 中国铁道科学研究院金属及化学研究所 | Non-contact type opening/closing split induction heating device for rail welded joints |
| CN105478973A (en) * | 2016-01-28 | 2016-04-13 | 兰州理工大学 | Ultra-narrow gap electric arc welding device with flux piece feeding chains |
| CN108237303A (en) * | 2017-01-22 | 2018-07-03 | 珠海启世机械设备股份有限公司 | A kind of steel rail narrow gap electric arc rail welding machine and its welding method |
| CN108971841A (en) * | 2018-09-27 | 2018-12-11 | 济南金陆丰实业有限公司 | A kind of mutual inductor raising seat straight seam welding tooling |
| US20200238417A1 (en) * | 2019-11-13 | 2020-07-30 | Shandong University | GTAW System and Welding Method for thick plates with an Ultra-narrow Gap |
| CN111531255A (en) * | 2020-05-30 | 2020-08-14 | 山东平云智能装备有限公司 | Narrow-gap argon tungsten-arc welding automatic equipment |
| CN111843128A (en) * | 2020-08-13 | 2020-10-30 | 兰州理工大学 | Ultra-narrow gap welding device and method for welding pipe fittings |
| CN112872550A (en) * | 2021-03-24 | 2021-06-01 | 兰州理工大学 | Welding device and method suitable for steel rail ultra-narrow gap |
| CN114769802A (en) * | 2022-05-12 | 2022-07-22 | 兰州理工大学 | Ultra-narrow gap welding gun suitable for feeding type flux piece restraining electric arc |
| CN115070165A (en) * | 2022-05-11 | 2022-09-20 | 华路德(浙江)焊接科技有限公司 | Narrow-gap vertical electro-gas welding process and equipment |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104175038A (en) * | 2014-09-10 | 2014-12-03 | 山东丰汇设备技术有限公司 | Device and method for automatically welding box beam |
| CN104289795A (en) * | 2014-09-22 | 2015-01-21 | 武汉纳瑞格智能设备有限公司 | MAG/MIG automatic welding device and method |
| CN105200876A (en) * | 2015-08-28 | 2015-12-30 | 中国铁道科学研究院金属及化学研究所 | Non-contact type opening/closing split induction heating device for rail welded joints |
| CN105478973A (en) * | 2016-01-28 | 2016-04-13 | 兰州理工大学 | Ultra-narrow gap electric arc welding device with flux piece feeding chains |
| CN108237303A (en) * | 2017-01-22 | 2018-07-03 | 珠海启世机械设备股份有限公司 | A kind of steel rail narrow gap electric arc rail welding machine and its welding method |
| CN108237303B (en) * | 2017-01-22 | 2023-12-12 | 珠海启世机械设备股份有限公司 | Rail narrow-gap arc welding machine and welding method thereof |
| CN108971841A (en) * | 2018-09-27 | 2018-12-11 | 济南金陆丰实业有限公司 | A kind of mutual inductor raising seat straight seam welding tooling |
| US11571763B2 (en) * | 2019-11-13 | 2023-02-07 | Shandong University | GTAW system and welding method for thick plates with an ultra-narrow gap |
| US20200238417A1 (en) * | 2019-11-13 | 2020-07-30 | Shandong University | GTAW System and Welding Method for thick plates with an Ultra-narrow Gap |
| CN111531255A (en) * | 2020-05-30 | 2020-08-14 | 山东平云智能装备有限公司 | Narrow-gap argon tungsten-arc welding automatic equipment |
| CN111843128A (en) * | 2020-08-13 | 2020-10-30 | 兰州理工大学 | Ultra-narrow gap welding device and method for welding pipe fittings |
| CN111843128B (en) * | 2020-08-13 | 2021-12-21 | 兰州理工大学 | Ultra-narrow gap welding device and method for welding pipe fittings |
| CN112872550A (en) * | 2021-03-24 | 2021-06-01 | 兰州理工大学 | Welding device and method suitable for steel rail ultra-narrow gap |
| CN115070165A (en) * | 2022-05-11 | 2022-09-20 | 华路德(浙江)焊接科技有限公司 | Narrow-gap vertical electro-gas welding process and equipment |
| CN115070165B (en) * | 2022-05-11 | 2024-05-03 | 浙江飞弧自动化科技有限公司 | Narrow-gap vertical electro-gas welding process and equipment |
| CN114769802A (en) * | 2022-05-12 | 2022-07-22 | 兰州理工大学 | Ultra-narrow gap welding gun suitable for feeding type flux piece restraining electric arc |
| CN114769802B (en) * | 2022-05-12 | 2023-12-22 | 兰州理工大学 | Ultra-narrow gap welding gun suitable for feeding type welding flux sheet constraint arc |
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