CN101767234A - Method for welding copper material rod and copper bush of coaxial conductive electric slag furnace - Google Patents
Method for welding copper material rod and copper bush of coaxial conductive electric slag furnace Download PDFInfo
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- CN101767234A CN101767234A CN200810204936A CN200810204936A CN101767234A CN 101767234 A CN101767234 A CN 101767234A CN 200810204936 A CN200810204936 A CN 200810204936A CN 200810204936 A CN200810204936 A CN 200810204936A CN 101767234 A CN101767234 A CN 101767234A
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- Prior art keywords
- copper
- welding
- material bar
- copper material
- cooling
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 112
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 112
- 239000010949 copper Substances 0.000 title claims abstract description 112
- 239000000463 material Substances 0.000 title claims abstract description 88
- 238000003466 welding Methods 0.000 title claims abstract description 59
- 238000000034 method Methods 0.000 title claims abstract description 27
- 241000227287 Elliottia pyroliflora Species 0.000 title claims abstract description 22
- 239000002893 slag Substances 0.000 title abstract 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims abstract description 29
- 238000001816 cooling Methods 0.000 claims abstract description 22
- 239000000498 cooling water Substances 0.000 claims abstract description 8
- 238000004804 winding Methods 0.000 claims abstract description 4
- 229910000679 solder Inorganic materials 0.000 claims description 13
- 238000005219 brazing Methods 0.000 claims description 4
- 239000010425 asbestos Substances 0.000 claims description 3
- 229910052895 riebeckite Inorganic materials 0.000 claims description 3
- 238000009827 uniform distribution Methods 0.000 claims description 3
- 238000005476 soldering Methods 0.000 abstract description 3
- 239000011810 insulating material Substances 0.000 abstract 2
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- -1 this Chemical compound 0.000 description 1
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Abstract
A method for welding a copper material rod and a copper bush of a coaxial conductive electric slag furnace comprises the following steps of: 1) welding a connecting copper pipe at the upper end of the copper bush by copper welding; 2) uniformly providing at least three through holes at the lower end of the copper material rod along the circumference of the copper material rod; 3) welding the copper material rod and the connecting copper pipe by soldering tin, coating a layer of heat insulating material around a weld joint between the copper material rod and the connecting copper pipe and winding a plurality of rings of cooling copper pipes outside the heat insulating material; and 4) starting welding, implanting a tin wire into the weld joint for welding the connecting copper pipe and the copper material rod from the through hole at the lower end of the copper material rod to connect the connecting copper pipe and the copper material rod by welding; and connecting a cooling copper pipe and cooling water, so that molten soldering tin flows into an aperture port of the weld joint and is cooled by the cooling copper pipe to be frozen. The welding quality and the welding success rate can be greatly enhanced and the labor intensity of workers can be greatly lowered.
Description
Technical field
The present invention relates to welding method, particularly coaxial conductive electroslag furnace copper material bar and copper bush welding method.
Background technology
The coaxial conductive electroslag furnace is the protective atmosphere electroslag furnace.The important part of electroslag furnace electrode feed system is a conductive copper material bar, copper material bar size: external diameter Φ 300, internal diameter Φ 272, length 6400.It is 102 copper bush that an end length has been welded with the method for scolding tin welding in material bar bottom, and the length at scolding tin position is 63.5mm, and the distance of welding seam distance material bar bottom is 133.8mm.Copper bush is mainly used in electrode clamping and conduction, need conduct the electric current of 20000A between copper material bar and the copper bush by the scolding tin weld seam.The trade mark of the scolding tin solder of welding usefulness is QH-240, and fusing point is 250 ℃.
Referring to Fig. 1, Fig. 2, weld seam 30 is near copper material bar 10 lower ends, and the radiations heat energy of fire door 40 butt welded seams 30 is bigger in smelting process, and the scolding tin junction leaks easily.The pressure of material bar cooling water is 0.2MPa, copper material bar 10 bottoms require cooling water 50 flow velocity degree fast, can take away heat as early as possible, thus water proof to overlap current gap, 60 place little, blocked by impurity such as incrustation scales easily, also cause copper material bar scolding tin place's cooling effect difference easily and drainage occurs.Use two months weld seams to leak generally speaking.
After soldering place of material bar was leaked, welding was difficult especially consuming time again.Existing welding method is: the length that copper bush 20 is inserted into copper material bar 10 the insides is 63.5mm, on this segment length, all is coated with last layer scolding tin solder on copper bush outer surface and the copper material bar inner surface; Then copper bush is inserted in the copper material bar, evenly heats on copper material rod outer surface with two propane flame rifles again, make scolding tin solder fusing and copper bush 20 and copper material bar 10 are welded together.
The shortcoming of this welding method is:
1, temperature is difficult to control in the process of heating, and the scolding tin solder leaks out from the slit easily, causes leak scolding tin solder not enough, can not seal and leaks.
2, the success rate of this welding method is relatively lower has only 33%, and welding just once needs to do over again 2-3 time.
3, the efficient of this welding method is lower, and general welding once needs more than 10 hours at least.
4 and the welding mass ratio relatively poor, the position scolding tin that has is less, causes service life shorter, generally has only about 2 months.
5, weld seam is near material bar lower end, and the distance of welding seam distance material bar bottom is 133.8mm, and the radiations heat energy of fire door butt welded seam is bigger in smelting process, and scolding tin connects easily and leaks.
Summary of the invention
The objective of the invention is to design a kind of coaxial conductive electroslag furnace copper material bar and copper bush welding method, can improve welding quality greatly and be welded into power, can reduce working strength of workers greatly simultaneously.
For achieving the above object, technical scheme of the present invention is,
Coaxial conductive electroslag furnace copper material bar and copper bush welding method, it comprises the steps:
1) the copper bush upper end adopts brazing welding one to connect copper pipe;
2) the lower end edge copper material bar circumference uniform distribution of copper material bar is offered at least three through holes;
3) copper material bar adopts the scolding tin welding with being connected between the copper pipe, wraps up one deck temperature-resistant material at copper material bar with around the weld seam that is connected between the copper pipe, then the some circle cooling copper tube of winding outside temperature-resistant material;
4) begin welding, solder stick is beaten into the weld seam the inside that connects copper pipe and the welding of copper material bar from the through hole of copper material bar lower end, connection copper pipe and copper material bar are welded to connect; Cooling copper tube connects cooling water, makes the scolding tin of fusing flow to weld seam slit aperture place and is subjected to the cooling of cooling copper tube and solidifies.
Further, step 3) electroslag furnace copper material bar is welded to connect copper pipe, and welding seam distance copper material bar bottom is 300mm at least.
Again, described connection copper pipe and copper material bar weld seam contact-making surface separately are coated with last layer scolding tin solder in advance, will connect copper pipe then and be inserted in the copper material bar, wrap up one deck temperature-resistant material then around weld seam.
Have, described temperature-resistant material is asbestos again, and temperature-resistant material can prevent that scolding tin from going out to leak from the slit, can make place, soldered crack fully fill up scolding tin like this, has guaranteed welding quality and has been welded into power.
In the present invention,
1, electroslag furnace charge bar and base copper cover are improved: originally the height of welding seam distance material bar bottom is 70mm; Now the position more than the 300mm at least, distance material bar bottom will be moved on on the weld seam.Welding an end length in the method for primitive axis set upper side employing brazing is the copper pipe of 230mm, adopts the scolding tin welding between copper pipe upper end and the copper material bar.Improved like this advantage:
1) after weld seam had up moved, fire door was just little to the heat of its radiation, and the influence of terminal clamp when conduction heating butt welded seam also little (conductive contact surfaces is between material bar bottom and the auxiliary electrode).
2) after weld seam had up moved, cooling water had strengthened its cooling effect, and the water proof cover current gap that occurs before can not occurring is stopped up and the phenomenon of influence material bar cooling.Adopt the life-span of this construction joint to bring up to about half a year by original 2 months.
2, original welding method scolding tin solder leaks out from the slit easily, and it is lower to cause being welded into power ratio.Welding method of the present invention is to wrap up one deck temperature-resistant material around weld seam, twines cooling copper tube in the temperature-resistant material outside then.In flame heat, cooling copper tube connects cooling water, makes the scolding tin of fusing flow to slit aperture and goes out owing to the cooling effect of cooling copper tube is solidified.At the uniform through hole in the upper end of welding position, solder stick is beaten into the weld seam the inside from the through hole simultaneously.Adopting this method to be welded into power brings up to more than 90% by original 33%.
Beneficial effect of the present invention
When adopting original welding method, have only 2 months average life, and repairing a mean time to overhaul is 18 hours.After adopting the inventive method welding, be half a year average life, and repairing a mean time to overhaul is 10 hours.Can save the repair time in 1 year: 18 hours/time-2 times * of 6 * 10 hours/time=88 hours.
Description of drawings
Fig. 1 is a raw material bar Welding Structure schematic diagram;
Fig. 2 is a copper material bar operating mode schematic diagram;
Fig. 3 is a welding method schematic diagram of the present invention.
The specific embodiment
Referring to Fig. 2, coaxial conductive electroslag furnace copper material bar of the present invention and copper bush welding method, it comprises the steps:
1) copper bush 3 upper ends adopt brazing welding one to connect copper pipe 2;
2) lower end edge copper material bar 1 circumference uniform distribution of copper material bar 1 is offered three through holes 11;
3) copper material bar 1 adopts the scolding tin welding with being connected between the copper pipe 2, wraps up one deck temperature-resistant material 5---asbestos at copper material bar 1 with around the weld seam that is connected between the copper pipe 2, encloses cooling copper tube 6 in temperature-resistant material 5 outsides winding four then;
4) begin welding, solder stick is beaten into the weld seam the inside that connects copper pipe 2 and 1 welding of copper material bar from the through hole 11 of copper material bar 1 lower end, make to connect copper pipe 2 and be welded to connect with copper material bar 1; Feed cooling waters in the cooling copper tube 6, make the scolding tin of fusing flow to weld seam slit aperture place and be subjected to the cooling of cooling copper tube 6 and solidify.
Wherein, step 3) electroslag furnace copper material bar 1 is welded to connect copper pipe 2, and welding seam distance copper material bar 1 bottom is 300mm at least.
Described connection copper pipe 2 is coated with last layer scolding tin solder in advance with copper material bar 1 weld seam contact-making surface separately, will connect copper pipe 2 then and be inserted in the copper material bar 1, wraps up one deck temperature-resistant material 5 then around weld seam.
Claims (4)
1. coaxial conductive electroslag furnace copper material bar and copper bush welding method, it comprises the steps:
1) the copper bush upper end adopts brazing welding one to connect copper pipe;
2) the lower end edge copper material bar circumference uniform distribution of copper material bar is offered at least three through holes;
3) copper material bar adopts the scolding tin welding with being connected between the copper pipe, wraps up one deck temperature-resistant material at copper material bar with around the weld seam that is connected between the copper pipe, then the some circle cooling copper tube of winding outside temperature-resistant material;
4) begin welding, solder stick is beaten into the weld seam the inside that connects copper pipe and the welding of copper material bar from the through hole of copper material bar lower end, connection copper pipe and copper material bar are welded to connect; Cooling copper tube connects cooling water, makes the scolding tin of fusing flow to weld seam slit aperture place and is subjected to the cooling of cooling copper tube and solidifies.
2. coaxial conductive electroslag furnace copper material bar as claimed in claim 1 and copper bush welding method is characterized in that, step 3) electroslag furnace copper material bar is welded to connect copper pipe, and welding seam distance copper material bar bottom is 300mm at least.
3. coaxial conductive electroslag furnace copper material bar as claimed in claim 1 and copper bush welding method, it is characterized in that, described connection copper pipe and copper material bar weld seam contact-making surface separately are coated with last layer scolding tin solder in advance, to connect copper pipe then and be inserted in the copper material bar, around weld seam, wrap up one deck temperature-resistant material then.
4. coaxial conductive electroslag furnace copper material bar as claimed in claim 1 and copper bush welding method is characterized in that described temperature-resistant material is asbestos.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102049360A CN101767234B (en) | 2008-12-30 | 2008-12-30 | Method for welding copper material rod and copper bush of coaxial conductive electric slag furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102049360A CN101767234B (en) | 2008-12-30 | 2008-12-30 | Method for welding copper material rod and copper bush of coaxial conductive electric slag furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101767234A true CN101767234A (en) | 2010-07-07 |
| CN101767234B CN101767234B (en) | 2012-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008102049360A Active CN101767234B (en) | 2008-12-30 | 2008-12-30 | Method for welding copper material rod and copper bush of coaxial conductive electric slag furnace |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107584183A (en) * | 2017-08-19 | 2018-01-16 | 江苏标新工业有限公司 | A kind of welding procedure of electroslag furnace dummy electrode |
| CN111774809A (en) * | 2019-04-04 | 2020-10-16 | 佛山市顺德区美的电热电器制造有限公司 | Method for manufacturing pot and pot |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB884949A (en) * | 1959-10-10 | 1961-12-20 | Fred Lancaster | Improvements in or relating to pipe joints |
| CN88105479A (en) * | 1988-02-06 | 1988-09-28 | 上海新华无线电厂 | Brazing method of sleeve joint of aluminium and copper conduits |
| CN1416995A (en) * | 2002-11-06 | 2003-05-14 | 天津大学 | Pipe butt welding method and butt welded pipe |
| CN200993541Y (en) * | 2006-12-22 | 2007-12-19 | 唐威力 | Copper-aluminium welded combined heat exchanger pipe fitting |
-
2008
- 2008-12-30 CN CN2008102049360A patent/CN101767234B/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107584183A (en) * | 2017-08-19 | 2018-01-16 | 江苏标新工业有限公司 | A kind of welding procedure of electroslag furnace dummy electrode |
| CN111774809A (en) * | 2019-04-04 | 2020-10-16 | 佛山市顺德区美的电热电器制造有限公司 | Method for manufacturing pot and pot |
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| Publication number | Publication date |
|---|---|
| CN101767234B (en) | 2012-01-11 |
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Owner name: BAOSTEEL SPECIAL STEEL CO., LTD. Free format text: FORMER OWNER: BAOSHAN IRON + STEEL CO., LTD. Effective date: 20131210 |
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Free format text: CORRECT: ADDRESS; FROM: 201900 BAOSHAN, SHANGHAI TO: 200940 BAOSHAN, SHANGHAI |
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Effective date of registration: 20131210 Address after: 200940 Baoshan District aquatic Road, Shanghai, No. 1269 Patentee after: BAOSTEEL SPECIALSTEEL CO., LTD. Address before: 201900 Fujin Road, Shanghai, orchard, Baoshan District Patentee before: Baoshan Iron & Steel Co., Ltd. Effective date of registration: 20131210 Address after: 200940 Baoshan District aquatic Road, Shanghai, No. 1269 Patentee after: BAOSTEEL SPECIALSTEEL CO., LTD. Address before: 201900 Fujin Road, Shanghai, orchard, Baoshan District Patentee before: Baoshan Iron & Steel Co., Ltd. |
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Effective date of registration: 20200515 Address after: 200940 room 1277, building 216, 1269 Shuishui Road, Baoshan District, Shanghai Patentee after: Baowu Special Metallurgy Co., Ltd Address before: 200940 No. 1269, Fisheries Road, Shanghai, Baoshan District Patentee before: BAOSTEEL SPECIAL STEEL Co.,Ltd. |