CN105382408A - Electroslag welding repairing method for anode steel stud head - Google Patents
Electroslag welding repairing method for anode steel stud head Download PDFInfo
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- CN105382408A CN105382408A CN201510867958.5A CN201510867958A CN105382408A CN 105382408 A CN105382408 A CN 105382408A CN 201510867958 A CN201510867958 A CN 201510867958A CN 105382408 A CN105382408 A CN 105382408A
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- welding
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- steel bar
- anode
- claw head
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- 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
- B23K25/00—Slag welding, i.e. using a heated layer or mass of powder, slag, or the like in contact with the material to be joined
- B23K25/005—Welding for purposes other than joining, e.g. built-up welding
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- 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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/02—Iron or ferrous alloys
- B23K2103/04—Steel or steel alloys
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Abstract
The invention discloses an electroslag welding repairing method for an anode steel stud head. Firstly, a burnt section of the steel stud head is cut off, and a round steel bar which is identical with the steel stud head in material and diameter is selected; then, four rectangular steel plates are adopted, two rectangular steel plates are machined and then welded with a bottom plate to form a welding groove, the steel stud head and the round steel bar are placed on the welding groove, the other two steel plates are pressed on the welding groove in a covering mode to form runoff weld tabs, and the runoff weld tabs are welded on the upper portion and the lower portion of the steel stud head and the round steel bar; then, water-cooling sliding blocks are fixed to the other two side faces of the runoff weld tabs and the welding groove, and a consumable nozzle is fixed at the front end of a holding mechanism and adjusted to be located in the center of the welding groove; afterwards, welding is carried out after power-on through proper electroslag welding materials and processes; and finally, the runoff weld tabs and the welding groove are cut off, weld metal is ground to achieve smooth transition between the weld metal and the steel stud head and the round steel bar, and therefore the steel stud head is repaired. According to the electroslag welding repairing method, the steel stud head and the round steel bar are welded at a time, total cross-section metallurgical bonding is achieved, the connector strength is high, the specific resistance is low, the welding efficiency is high, and the composite repairing cost is greatly lowered.
Description
Technical field
The present invention relates to REPAIR WELDING field, especially relate to a kind of electroslag welding restorative procedure for anode steel claw head.
Background technology
Anode steel claw is that Aluminum Electrolysis Production process uses more equipment part, because it contacts with electrolytic aluminium liquid for a long time, is very easily corroded in high temperature, big current operating environment, thus causes consumption large, and task of repairing is comparatively heavy.For a long time, the reparation of domestic aluminium electrolysis enterprise antianode steel pawl all adopts manual arc soldering method, i.e. traditional weld all around method, but because of the limitation of weldment retaining wall on slope and welding procedure, this welding method not only efficiency is low, and welding point to there is bonding area little, strength of joint is low, resistivity is large, and the shortcomings such as service life is short, therefore have a strong impact on and restrict the control of aluminium electrolysis enterprise to production cost.
For many defects of traditional weld all around method that the reparation of anode steel claw head uses, some mechanisms have developed casting technology in recent years, and came into operation.The principle of casting technology is that steel pawl after dicing arranges a crystallizer, place one section of round steel bar in crystallizer, adopt founding soldering equipment, rod iron is melted, utilize together with the molten steel melted to cast with the steel pawl first melt of damage by crystallizer, until reach the height needed for steel pawl head.The method to some extent solves the larger problem of weld all around connection resistance rate, but welding equipment floor space is large, and disposable input is comparatively large, also there is certain potential safety hazard.
Summary of the invention
The object of the present invention is to provide a kind of electroslag welding restorative procedure for anode steel claw head, the method is simply efficient, and exploitativeness is strong, and the strength of joint welded out is high, resistivity is low, long service life.
For achieving the above object, originally following technical proposals can be taked:
Electroslag welding restorative procedure for anode steel claw head of the present invention comprises the steps:
The first step, welds prepares
The scaling loss section of anode steel claw cephalic par to be repaired is excised completely, then chooses one section with this anode steel claw head with the round steel bar of material with diameter, and the surface to be welded of antianode steel pawl head and round steel bar carries out machined, makes its surface roughness Ra=6.3 ~ 12.5 μm;
Choose four blocks of measure-alike rectangle steel plates, and process the diameter semi-circular groove identical with anode steel claw head at a side, wherein two block plate semi-circular groove being kept at a certain distance away upward is welded on the base plate of horizontal positioned, and formed weld groove, another two block plates are for subsequent use;
Second step, assembling before weldering
The anode steel claw head of first step process and round steel bar have been lain in a horizontal plane in the two halves circular trough of weld groove respectively, both guarantees axle center is consistent, adjust fit-up gap therebetween and make it the middle part being in weld groove, two block plate correspondences for subsequent use are withheld above anode steel claw head and round steel bar, forms end tab; Again by end tab with rise weld groove respectively vertical correspondence be welded on the upper and lower part of anode steel claw head and round steel bar termination;
End tab with two other side of a weld groove fix water-cooled slide block respectively, the consumable nozzle clamping device of welding machine is fixed, consumable nozzle is fixed on blessing device front end, and regulate consumable nozzle clamping device, make consumable nozzle be in the centre of fit-up gap;
3rd step, welding
According to material and the joint form of steel pawl head and round steel bar, suitable electroslag welding welding material and technique energising is selected to carry out welding;
4th step, after welding treatment
Welding is complete, and by end tab and a weld groove excision, polishing welding seams metal makes itself and steel pawl head and round steel bar seamlessly transit, and completes the reparation of this anode steel claw head.
The weld width sum formed after the length of remaining length, selected round steel bar and the 3rd step welding after the excision of described first step Anodic steel pawl head equals the design length of anode steel claw head.
The diameter of described anode steel claw head to be repaired is D, is respectively D/2+40 ~ D/2+40mm, D and 20 ~ 70mm for the length and width and thickness having processed four block length square plates of weld groove and end tab.
In two v-shaped structure between described second step Anodic steel pawl head and round steel bar surface to be welded, on it, groove fit-up gap is 31 ~ 35mm, and lower groove fit-up gap is 33 ~ 38mm.
Consumable nozzle used in second step is single mariages or three consumable nozzles, and the distance between the water-cooled slide block of described consumable nozzle and both sides is 8 ~ 10mm.
Described water-cooled slide block is the Copper Water Jacket with entery and delivery port.
Steel pawl head and round steel bar have once welded by electroslag welding restorative procedure of the present invention, not only achieve the metallurgical binding of total cross-section, strength of joint is high, resistivity is low, and electroslag welding equipment is simple, welding efficiency is high, automaticity is high, remediation efficiency is high, and comprehensive repair cost is reduced greatly.
Accompanying drawing explanation
Fig. 1 is the structural representation playing weld groove that the present invention welds.
Fig. 2 is the assembly structure schematic diagram of the present invention when welding.
Fig. 3, Fig. 4 are fit-up gap schematic diagrames between Fig. 2 Anodic steel pawl head and round steel bar.
Detailed description of the invention
Below by specific embodiment, more detailed explanation is done to the present invention.
For the REPAIR WELDING of the anode steel claw head of the single four paws head of certain electrolytic aluminium factory domestic, the material of steel pawl head is ZG230-450, intended diameter φ 180mm, design length 280mm, scaling loss segment length 140mm.
The first step, welds prepares
1) gas cutting is adopted the scaling loss section of anode steel claw head 1 to be repaired and termination to be excised completely, residue 110mm, choosing one section with this anode steel claw head is 136mm with material with the round steel bar 2(length of diameter), and the surface to be welded of antianode steel pawl head 1 and round steel bar 2 carries out machined, makes its surface roughness Ra=6.3 ~ 12.5 μm;
2) processing of weld groove and end tab is played
According to the diameter of anode steel claw head 1, choose the cuboid steel plate that four pieces are of a size of 150 × 180 × 50mm, and the semi-circular groove of diameter 180mm is processed at a side of cuboid steel plate, the cuboid steel plate (as base plate) two blocks of cuboid steel plates and another block being of a size of 180 × 83 × 50mm has been welded into weld groove, play weld groove structure as shown in Figure 1, the steel plate of both sides is respectively left supported plate 3, right supported plate 4, pad bottom left supported plate 3 and right supported plate 4 for base plate 5, another two block plates are for subsequent use;
Second step, assembling before weldering
As shown in Figure 2, in the left supported plate 3 anode steel claw head 1 of first step process and round steel bar 2 having been lain in a horizontal plane in respectively weld groove and right supported plate 4 semi-circular groove, both guarantees axle center is consistent, adjustment fit-up gap has therebetween been in the middle part of weld groove, two block plate correspondences for subsequent use are withheld above anode steel claw head 1 and round steel bar 2, forms left end tab 6 and right end tab 7; Then by left end tab 6, right end tab 7 and left supported plate 3, right supported plate 4 respectively vertical correspondence be welded on the upper and lower part of anode steel claw head 1 and round steel bar 2;
Actually add man-hour, anode steel claw head 1 and the surface to be welded of round steel bar 2 can be processed into the different truncated cone of angle, make the fit-up gap with upper and lower groove formed as shown in Figure 3 or Figure 4 therebetween.Fit-up gap of the present invention, as shown in Figure 3, on it, groove fit-up gap is 33mm, and lower groove fit-up gap is 35mm.
The end tab not installing anode steel claw head 1 and round steel bar 2 and two other side of playing weld groove are fixed with water-cooled slide block 8(water-cooled slide block 8 respectively and can adopt Copper Water Jacket with entery and delivery port), object is when welding, the circulating water passed in water-cooled slide block 8 inner chamber is utilized to be taken away by the heat in weld seam, so both be beneficial to the shaping of weld seam, the structure refinement of weld seam can be made again; Then the consumable nozzle clamping device 9 of welding machine is fixed: consumable nozzle 10 is fixed on the front end accommodating mechanism 9, and regulates consumable nozzle clamping device, make consumable nozzle 10 be in the centre (also namely playing the center of weld groove) of fit-up gap;
3rd step, welding
According to material and the joint form of steel pawl head and round steel bar, the wire feed rate of welding machine is set to 180 ~ 200m/h, weldingvoltage is set to 40 ~ 46V, speed of welding controls at 0.6 ~ 0.8m/h, for the benefit of deslagging in welding process, keep continuing to implement welding, depth of slag bath is set to 45 ~ 55mm, and be then energized welding;
4th step, after welding treatment
Welding is complete, and by left end tab 6, right end tab 7 and a weld groove excision, polishing welding seams metal 11 makes itself and steel pawl head 1 and round steel bar 2 seamlessly transit, and completes the reparation of this anode steel claw head.
Failure test detection is carried out to the anode steel claw head after electroslag welding reparation, result shows: joint all realizes metallurgical binding, free from flaw is mingled with and the defect such as incomplete fusion, and its pressure fall-off test result is 53 millivolts, substantially close to the index of anode steel claw average pressure drop 50 millivolts.
Claims (6)
1., for an electroslag welding restorative procedure for anode steel claw head, it is characterized in that: comprise the steps:
The first step, welds prepares
The scaling loss section of anode steel claw cephalic par to be repaired is excised completely, then chooses one section with this anode steel claw head with the round steel bar of material with diameter, and the surface to be welded of antianode steel pawl head and round steel bar carries out machined, makes its surface roughness Ra=6.3 ~ 12.5 μm;
Choose four blocks of measure-alike rectangle steel plates, and process the diameter semi-circular groove identical with anode steel claw head at a side, wherein two block plate semi-circular groove being kept at a certain distance away upward is welded on the base plate of horizontal positioned, and formed weld groove, another two block plates are for subsequent use;
Second step, assembling before weldering
The anode steel claw head of first step process and round steel bar have been lain in a horizontal plane in the two halves circular trough of weld groove respectively, both guarantees axle center is consistent, adjust fit-up gap therebetween and make it the middle part being in weld groove, two block plate correspondences for subsequent use are withheld above anode steel claw head and round steel bar, forms end tab; Again by end tab with rise weld groove respectively vertical correspondence be welded on the upper and lower part of anode steel claw head and round steel bar termination;
End tab with two other side of a weld groove fix water-cooled slide block respectively, the consumable nozzle clamping device of welding machine is fixed, consumable nozzle is fixed on blessing device front end, and regulate consumable nozzle clamping device, make consumable nozzle be in the centre of fit-up gap;
3rd step, welding
According to material and the joint form of steel pawl head and round steel bar, suitable electroslag welding welding material and technique energising is selected to carry out welding;
4th step, after welding treatment
Welding is complete, and by end tab and a weld groove excision, polishing welding seams metal makes itself and steel pawl head and round steel bar seamlessly transit, and completes the reparation of this anode steel claw head.
2. the electroslag welding restorative procedure for anode steel claw head according to claim 1, is characterized in that: the weld width sum formed after the length of remaining length, selected round steel bar and the 3rd step welding after the excision of described first step Anodic steel pawl head equals the design length of anode steel claw head.
3. the electroslag welding restorative procedure for anode steel claw head according to claim 1, it is characterized in that: the diameter of described anode steel claw head to be repaired is D, length and width and thickness for having processed four block length square plates of weld groove and end tab are respectively D/2+40 ~ D/2+40mm, D and 20 ~ 70mm.
4. the electroslag welding restorative procedure for anode steel claw head according to claim 1, it is characterized in that: in two v-shaped structure between described second step Anodic steel pawl head and round steel bar surface to be welded, on it, groove fit-up gap is 31 ~ 35mm, and lower groove fit-up gap is 33 ~ 38mm.
5. the electroslag welding restorative procedure for anode steel claw head according to claim 1, is characterized in that: consumable nozzle used in second step is single mariages or three consumable nozzles, and the distance between the water-cooled slide block of described consumable nozzle and both sides is 8 ~ 10mm.
6. the electroslag welding restorative procedure for anode steel claw head according to claim 1, is characterized in that: described water-cooled slide block is the Copper Water Jacket with entery and delivery port.
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| CN201510867958.5A CN105382408B (en) | 2015-12-02 | 2015-12-02 | A kind of electroslag welding restorative procedure for anode steel claw head |
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| CN201510867958.5A CN105382408B (en) | 2015-12-02 | 2015-12-02 | A kind of electroslag welding restorative procedure for anode steel claw head |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106001908A (en) * | 2016-06-29 | 2016-10-12 | 新疆众和股份有限公司 | Welding method and device for electrolytic cell cathode square steel |
| CN107225227A (en) * | 2017-07-31 | 2017-10-03 | 姜彦平 | A kind of electroslag plate electrode melting welding crystallizer and its manufacture method |
| CN108340092A (en) * | 2018-03-02 | 2018-07-31 | 华北水利水电大学 | A kind of brazing material and preparation method thereof for anode steel claw reparation |
| CN109249126A (en) * | 2018-11-15 | 2019-01-22 | 郑州经纬科技实业有限公司 | Anode steel claw welding tooling and welding method |
| CN109623096A (en) * | 2019-02-25 | 2019-04-16 | 焦作智造机电设备有限公司 | Narrow gap welding fixture unit and the narrow gap welding method for being electrolysed aluminum steel pawl |
| CN113182643A (en) * | 2021-02-08 | 2021-07-30 | 贵阳铝镁设计研究院有限公司 | Method for preventing molten iron from flowing outwards in deep and narrow seam welding |
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| CN203346488U (en) * | 2013-07-15 | 2013-12-18 | 包头市中硕焊接科技有限公司 | Structure of anode steel claw |
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| CN104668767A (en) * | 2013-12-03 | 2015-06-03 | 黑龙江融德建筑技术开发有限公司 | Tubular dissolved nozzle electroslag welding device of steel structural high-rise building construction |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106001908A (en) * | 2016-06-29 | 2016-10-12 | 新疆众和股份有限公司 | Welding method and device for electrolytic cell cathode square steel |
| CN107225227A (en) * | 2017-07-31 | 2017-10-03 | 姜彦平 | A kind of electroslag plate electrode melting welding crystallizer and its manufacture method |
| CN107225227B (en) * | 2017-07-31 | 2023-02-21 | 内蒙古世星新材料科技有限公司 | Electroslag plate electrode fusion welding crystallizer and manufacturing method thereof |
| CN108340092A (en) * | 2018-03-02 | 2018-07-31 | 华北水利水电大学 | A kind of brazing material and preparation method thereof for anode steel claw reparation |
| CN108340092B (en) * | 2018-03-02 | 2020-01-10 | 华北水利水电大学 | Brazing material for repairing anode steel claw and preparation method thereof |
| CN109249126A (en) * | 2018-11-15 | 2019-01-22 | 郑州经纬科技实业有限公司 | Anode steel claw welding tooling and welding method |
| CN109623096A (en) * | 2019-02-25 | 2019-04-16 | 焦作智造机电设备有限公司 | Narrow gap welding fixture unit and the narrow gap welding method for being electrolysed aluminum steel pawl |
| CN109623096B (en) * | 2019-02-25 | 2024-02-06 | 焦作智造机电设备有限公司 | Narrow gap welding fixture unit and narrow gap welding method for electrolytic aluminum steel claw |
| CN113182643A (en) * | 2021-02-08 | 2021-07-30 | 贵阳铝镁设计研究院有限公司 | Method for preventing molten iron from flowing outwards in deep and narrow seam welding |
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