CN105855744A - Welding groove and welding method of narrow slit of crane track - Google Patents
Welding groove and welding method of narrow slit of crane track Download PDFInfo
- Publication number
- CN105855744A CN105855744A CN201510282739.0A CN201510282739A CN105855744A CN 105855744 A CN105855744 A CN 105855744A CN 201510282739 A CN201510282739 A CN 201510282739A CN 105855744 A CN105855744 A CN 105855744A
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- Prior art keywords
- welding
- rail
- bevel
- groove
- flange
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K33/00—Specially-profiled edge portions of workpieces for making soldering or welding connections; Filling the seams formed thereby
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/02—Seam welding; Backing means; Inserts
- B23K9/025—Seam welding; Backing means; Inserts for rectilinear seams
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/235—Preliminary treatment
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Arc Welding In General (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention relates to a welding groove structure and welding method of a steel rail butt joint narrow slit in the hoisting and conveying industry. A welding groove of a narrow slit of a crane track comprises a steel rail 1, a steel rail 2 and circular V-shaped welding groove bodies 3. The circular V-shaped welding groove bodies are machined in all outer lines except rail bottom lines of the sections of the steel rails; the width of the groove bodies is 0.4 h1, and h1 is the height of railheads; and the technique means that the angles of welding groove bodies on different sections are different is adopted. By the adoption of the technical scheme, the problems that according to manual arc welding, a welding gap with the width of 15-20 mm is reserved, the welding technique is complex, and the welding quality is hard to guarantee are solved; and the consumption of welding materials in the welding process is reduced, the emission of harmful gas in the welding process is reduced, and energy saving and environmental friendliness are achieved.
Description
Technical field
The present invention relates in operated hoisting transport driving industry track welding technical field, be specifically related to the large and small car of crane and railway transportation track bond narrow slit bevel for welding structure and welding method.
Technical background
Aluminum weld and manual electric arc welding two ways is mainly used: exothermic welding is mainly used in processing or using insertion to lay the connection construction of gapless track after existing gapless track fractures during the welding of track bond at present, this kind of method welding point ride comfort is preferable, but owing to aluminum weld needs special equipment, welding procedure is complicated, weld seam is cast sturcture, there is congenital defect, and required wlding present stage almost all dependence on import in welding inherent quality, price comparison is expensive；During manual electric arc welding welding, for ensureing weldquality, typically two rail heads being reserved 15 ~ 20mm gap, groove type is I shape groove, layering built-up welding is used during welding, the welding stress produced during welding is bigger, is easily generated welding deformation, and its raceway surface welding slag thickness of postwelding is difficult to rail level straight, in general, its welding procedure is complicated, and weldquality is relatively difficult to ensure card, and welding efficiency is low.
Summary of the invention
For solving above prior art shortcoming and the problem of existence, the present invention provides a kind of crane runway narrow slit bevel for welding and the technical scheme of welding method.
The technical program one is to use ring V-shaped welding groove, thus two rails butt-joint clearance when reducing welding；Two is to take crane runway narrow slit welding method for V-shaped welding groove, and realizes the welding of track narrow slit.
The present invention takes techniques below means to realize:
A kind of crane runway narrow slit bevel for welding, including rail 1, rail 2 and ring V-type bevel for welding 3, described ring V-type bevel for welding 3 is located at the rail head junction of rail 1 and rail 2；Ring V-type bevel for welding 3 is made up of the 1/2V type groove docking each processed at the rail head of rail of rail 1 and rail 2, and the flange of rail line of 1/2V type groove joint rail 1 and the flange of rail line parallel distance of rail 2 are 2 ~ 3mm.
Described ring V-butt be other in addition to the flange of rail line of rail section outer along the line on be designed with groove, its groove width is 0.4h1, h1 is that rail head is high, bevel for welding angle is 15 ± 2 by the bevel for welding angle that the section of track is respectively as follows: on rail head face, the bevel for welding angle of rail head two sides is 15 ~ 25, the bevel for welding angle of the web of the rail is 25 ± 2, and the bevel for welding angle of the flange of rail is 25 ± 2, and at the web of the rail and flange of rail arc transition, bevel for welding is 25 ~ 13 ~ 25.
It is to have enough molten baths during in welding that the present invention takes in the technological means that the bevel for welding angle used by the different sections of track is different, thus ensures crane runway welding quality.
The processing step of a kind of track narrow slit welding method taked for ring V-shaped welding groove is as follows.
1, rail head molding
Groove all uses O2-C2H2 cutting, clears up joint after cutting, and smooth with grinder buffing, cleaning scope is joint both sides 60 ~ 80mm, removes the impurity such as moisture content, oxide skin, greasy dirt, nitride and foreign organic matter.
2, the location of track and the pre-heat treatment
When welding weldering connection track because of narrow slit, play movement is little, and during welding, produced welding stress and distortion is the least, the external force that the stress that track deadweight produces when being enough to overcome it to weld produces with deformation, therefore only need to keep weld gap about 2mm, directly welds after alignment.
The welding preheating of track narrow slit, uses common gas welding nozzle heating can meet requirement, and heat range is 2 each about 100mm of rail joint, and between preheating and road, temperature controls between 300 ~ 400 DEG C.
3, welding
Welded rails welding should carry out draught exclusion device, in order to avoid generation pore, in welding process, need electric welder and cleaner 2 people to coordinate and carry out, cleaner to be not only responsible for, to the surface welding slag cleaning work in welding process, being also adjusted technological parameter according to the change of position while welding and layer.
4, groove temper
The scope of weld seam tempering is centered by weld seam, and about length 100mm, temperature controls at about 630 DEG C, after temperature reaches requirement, keeps heating about 30min so that it is temperature tends to constant.
5, grinding process
First carry out scarfing cinder with flat chisel butt welded seam, then hold emery wheel with electric hand and polish weld seam, the most slightly above track profile, finally with file interlock filing rail head upper surface with two sides to the most concordant with track.If there being bigger file trace after file, available fine sand paper is sliding by surface grinding.
6, flaw detection and deformation examination
Flaw detection can use the PT penetrating inspection that welding profession is general, and its touchstone is with reference to Q/BU.J1517-2005, and II grade qualified.For ensureing track postwelding linearity and level, after track welding completes, tackling it and carry out levels of warpage deformation examination, its requirement is controlled at 1/2000, i.e. less than 1mm in 2m length.
Track bond narrow slit welding procedure of the present invention, it is achieved that rail 2 ~ 3mm butt welding process；Have the advantage that (1) solves aluminum weld welding procedure complicated, the problem that welding cost is high；(2) two rail heads need to be reserved 15 ~ 20mm when solving current manual electric arc welding welding, the problem that weldquality is also difficult to ensure that；(3) it is greatly saved welding material use quantity, and noxious gas emission can be reduced, it is achieved energy-conserving and environment-protective.
Accompanying drawing explanation
Fig. 1 is ring double V-groove structural representation of the present invention
Fig. 2 is that ring V-butt of the present invention cuts schematic front view
Fig. 3 is that the ring V-butt of the present invention cutting right side regards schematic diagram
Fig. 4 is steel rail for crane cross section structure schematic diagram (YB/T
5055-93)
Fig. 5 is steel rail for crane cross section structure sized data (YB/T
5055-93)
Wherein: 1 rail 1
2 rail 23 ring V-type bevel for weldings
4 1/2V type welding are domatic
5 rail head cross section 6 1/2 bevel angles.
Detailed description of the invention
For further illustrating technical scheme, it is described in detail with specific embodiment below in conjunction with the accompanying drawings:
Embodiment 1:
1, rail head molding: require to process by the technology preparing the rail head according to the form below of two QU70 crane runways of welding:
| Bevel angle | On rail head face 15 | Rail head two sides 15 ~ 25 | The web of the rail 25 | The flange of rail 25 | At the web of the rail and flange of rail arc transition 25 ~ 13 ~ 25 |
| Groove depth | 24.26 | 24.26~13.94 | 13.94 | 13.94 | 13.94~28.15~13.94 |
It processes step: groove all uses O2-C2H2 cutting, clears up joint after cutting, and smooth with grinder buffing, cleaning scope is joint both sides 60 ~ 80mm, removes the impurity such as moisture content, oxide skin, greasy dirt, nitride and foreign organic matter.
2, welding step:
A kind of crane runway narrow slit bevel for welding and welding method, installing, adjusting and during welding, and joint to be kept aligns, it is ensured that on the same line, the phenomenon such as must not occur staggering and twisted two track centerlines.
The welding job of each rail joint should be carried out continuously, and once completes, it is ensured that in welding process, welding bead maintains higher temperature, as when midway stops weldering for a long time for some reason, again must re-start preheating before welding；Rail joint should not carry out welding job in low temperature environment, during as constructed in the winter time, should take measures to make rail joint in welding with heat treatment process, it is to avoid quick refrigeration phenomenon.
Use the CO of gas purity >=99.8%2Gas shielded arc welding welds, and selects small nozzle sizes welding gun, and welding condition is shown in Table 1, welding process.
Table 1 welding condition
Tack welding, the mutual alignment for preventing welding process middle orbit from shifting, between fixing welded rails, it is ensured that whole welding structural element obtains correct size and geometry, first docking port carries out tack welding.The quality of tack welding directly influences the quality of formal weld seam, therefore it is required that tack welding is the same with formal weldquality, selects to be advisable outside the flange of rail.
Backing welding, the order of welding is, respectively the both sides flange of rail is carried out backing welding, then regulates welding condition, completes web of the rail backing welding, and finally regulation parameter carries out the backing welding of rail head.For ensureing good appearance of weld, during backing welding, electric arc to be stopped in groove both sides.In whole backing welding termination process, the forming process in molten bath to be controlled, it is ensured that the 1/3 of electric arc is before molten bath, and 2/3 covering of electric arc is on molten bath, and the size and shape keeping molten bath is consistent.During backing welding, the fusion situation of groove root is extremely important, is the key of welding point whether through welding.
Filling weldering, the order of welding is consistent with backing welding.Requiring before weldering to remove clean by the slag of bottoming layer and splashing, then could start welding, employing is layered shunting mode and carries out, and for ease of shaping and heat radiation, every layer of throat depth is not more than 4mm, it should be noted that carry out the cleaning work of welding slag in welding process.When filling weldering, the amplitude of fluctuation of welding rod strengthens, and long when the time of staying of groove both sides is than backing welding, there is certain fusion penetration groove both sides, fuses good between principal security each layer welding bead and between welding bead and mother metal.For ensureing quality of weld seam molding, last layer fills the general concavity of weld seam of weldering, and height should be lower 1 ~ 1.5mm than mother metal, is careful not to melt the seamed edge on groove both sides.
Cosmetic welding, cosmetic welding is the key that weld appearance shapes, and directly affects size and the fusion situation of face of weld.For ensureing that weld seam is smooth, its welding sequence is to be welded to web of the rail rail level from flange of rail side, then to the opposite side web of the rail to the flange of rail, should be once-forming during welding, the slag of preceding layer and splashing are removed clean before weldering.
Embodiment 2:
1, rail head molding: require to process by the technology preparing the rail head according to the form below of two QU80 crane runways of welding,
| Bevel angle | On rail head face 15 | Rail head two sides 15 ~ 25 | The web of the rail 25 | The flange of rail 25 | At the web of the rail and flange of rail arc transition 25 ~ 13 ~ 25 |
| Groove depth | 26.12 | 26.12~15.01 | 15.01 | 15.01 | 15.01~30.32~15.01 |
It processes step: groove all uses O2-C2H2 cutting, clears up joint after cutting, and smooth with grinder buffing, cleaning scope is joint both sides 60 ~ 80mm, removes the impurity such as moisture content, oxide skin, greasy dirt, nitride and foreign organic matter.
2, welding step:
Identical with the step 2 of embodiment 1.
Embodiment 3:
1, rail head molding: require to process by the technology preparing the rail head according to the form below of two QU100 crane runways of welding:
| Bevel angle | On rail head face 15 | Rail head two sides 15 ~ 25 | The web of the rail 25 | The flange of rail 25 | At the web of the rail and flange of rail arc transition 25 ~ 13 ~ 25 |
| Groove depth | 29.86 | 29.86~17.16 | 17.16 | 17.16 | 17.16~34.65~17.16 |
It processes step: groove all uses O2-C2H2 cutting, clears up joint after cutting, and smooth with grinder buffing, cleaning scope is joint both sides 60 ~ 80mm, removes the impurity such as moisture content, oxide skin, greasy dirt, nitride and foreign organic matter.
2, welding step:
Identical with the step 2 of embodiment 1.
Embodiment 4:
1, rail head molding: require to process by the technology preparing the rail head according to the form below of two QU120 crane runways of welding:
| Bevel angle | On rail head face 15 | Rail head two sides 15 ~ 25 | The web of the rail 25 | The flange of rail 25 | At the web of the rail and flange of rail arc transition 25 ~ 13 ~ 25 |
| Groove depth | 33.59 | 33.59~19.3 | 19.3 | 19.3 | 19.3~38.53~19.3 |
It processes step: groove all uses O2-C2H2 cutting, clears up joint after cutting, and smooth with grinder buffing, cleaning scope is joint both sides 60 ~ 80mm, removes the impurity such as moisture content, oxide skin, greasy dirt, nitride and foreign organic matter.
2, welding step:
Identical with the step 2 of embodiment 1.
Claims (1)
1. a crane runway narrow slit bevel for welding, including rail (1), rail (2) and ring V-type bevel for welding (3), it is characterised in that: described ring V-type bevel for welding (3) is located at the rail head junction of rail (1) and rail (2)；Described ring V-type bevel for welding (3) is made up of the 1/2V type groove docking each processed at the rail head of rail of rail (1) and rail (2), and the flange of rail line of 1/2V type groove joint rail (1) and the flange of rail line parallel distance of rail (2) are 2 ~ 3mm；Described ring V-butt be other in addition to the flange of rail line of rail section outer along the line on be designed with groove, its groove width is 0.4h1, h1 is that rail head is high, bevel for welding angle is 15 ± 2 by the bevel for welding angle that the section of track is respectively as follows: on rail head face, the bevel for welding angle of rail head two sides is 15 ~ 25, the bevel for welding angle of the web of the rail is 25 ± 2, and the bevel for welding angle of the flange of rail is 25 ± 2, and at the web of the rail and flange of rail arc transition, bevel for welding is 25 ~ 13 ~ 25.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510282739.0A CN105855744A (en) | 2015-05-29 | 2015-05-29 | Welding groove and welding method of narrow slit of crane track |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510282739.0A CN105855744A (en) | 2015-05-29 | 2015-05-29 | Welding groove and welding method of narrow slit of crane track |
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| CN105855744A true CN105855744A (en) | 2016-08-17 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022213708A1 (en) * | 2021-04-07 | 2022-10-13 | 德州学院 | Steel rail welding method and device |
| CN115401407A (en) * | 2022-08-01 | 2022-11-29 | 宜昌江峡船用机械有限责任公司 | Welding method capable of simultaneously ensuring strength and hardness of 40CrNiMoA welding line |
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| CN204843289U (en) * | 2015-05-29 | 2015-12-09 | 咸宁职业技术学院 | Crane track narrow slit welding groove |
-
2015
- 2015-05-29 CN CN201510282739.0A patent/CN105855744A/en active Pending
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| JP2002011575A (en) * | 2000-06-30 | 2002-01-15 | Kawasaki Steel Corp | Welding method for steel pipe |
| CN102825362A (en) * | 2012-09-13 | 2012-12-19 | 天津钢管集团股份有限公司 | S-shaped lap welding method for overhead travelling crane rails |
| CN102837115A (en) * | 2012-09-27 | 2012-12-26 | 中国化学工程第三建设有限公司 | Seamless welding method for aluminum and aluminum alloy or pipeline |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022213708A1 (en) * | 2021-04-07 | 2022-10-13 | 德州学院 | Steel rail welding method and device |
| CN115401407A (en) * | 2022-08-01 | 2022-11-29 | 宜昌江峡船用机械有限责任公司 | Welding method capable of simultaneously ensuring strength and hardness of 40CrNiMoA welding line |
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Application publication date: 20160817 |