CN107984059A - A kind of packless high conductivity anaerobic fine copper welder and welding method - Google Patents
A kind of packless high conductivity anaerobic fine copper welder and welding method Download PDFInfo
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- CN107984059A CN107984059A CN201711133561.9A CN201711133561A CN107984059A CN 107984059 A CN107984059 A CN 107984059A CN 201711133561 A CN201711133561 A CN 201711133561A CN 107984059 A CN107984059 A CN 107984059A
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Classifications
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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
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/167—Arc welding or cutting making use of shielding gas and of a non-consumable electrode
- B23K9/1675—Arc welding or cutting making use of shielding gas and of a non-consumable electrode making use of several electrodes
-
- 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
- B23K9/23—Arc welding or cutting taking account of the properties of the materials to be welded
-
- 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
-
- 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
- B23K9/24—Features related to electrodes
-
- 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
- B23K9/32—Accessories
- B23K9/325—Devices for supplying or evacuating shielding gas
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Arc Welding In General (AREA)
Abstract
The invention discloses a kind of packless high conductivity anaerobic fine copper welder and welding method, apparatus structure to be：Welding gun made of a ceramics is buckled to above the upper copper sheet of copper sheet overlap；Welding gun is internally provided with electrode vertically downward, and the bottom of electrode is in inverted conical, and the distance between the vertex of electrode base inverted cone and welding gun plane of the opening are 4~5mm；Top of electrodes is connected by conducting wire with DC power cathode, and DC power anode connects the free end of lower copper sheet by conducting wire；The outside of welding gun is equipped with welding gun control system, and welding gun control system includes controller, timer, controlling switch and current controller, and current controller is connected with the anode of DC power supply, and current controller, timer and controlling switch are connected with controller respectively.The present invention need not use filler and solder flux, it is ensured that the copper holding 99.9% in nugget area is high-purity, ensure that high-purity, high conductivity and the high conductivity of copper sheet.
Description
Technical field
The invention belongs to welding field, more particularly to a kind of packless high conductivity anaerobic fine copper welder and welding
Method.
Background technology
Motor is commonly used in the electric vehicle that is run under hundreds of amperes of high direct current.In this case, lead
The conducting of electric line is very crucial.Conductive copper sheet is the major way for connecting power supply and electrical equipment or electricity consumption place,
In actual circuit, generally require to connect multiple conductive copper sheets into the copper sheet to form one section longer use.Traditional connection
The mode of two conductive copper sheets is to be fixedly connected two conductive copper sheets by bolt.2 copper sheets are connected by bolt
Get up like being by this 2 copper sheets overlap joint.Be bolted and be mainly made of three steps, drilled on copper sheet first；Secondly,
Clean copper surface；In some cases, it is also necessary to connect with coating (addition gold, silver, one kind in nickel or tin these elements) coating
Region is closed, this process spends higher, not only time-consuming, skill set requirements height, it is also necessary to use more instruments, equipment.Final step,
With screw copper coin is connected with bending packing ring.In addition, the lubricating grease using MoS2 bases when, need to use sufficiently large power (10~
15KN, according to 43 673 standards of DIN) enable extruding composition surface to provide sufficient contact area.And use is bolted copper sheet
End have the disadvantages that：
1st, limited contact area, is connected with conductive area very little during copper sheet, this adds increased contact resistance and
The loss of electricity, the electrical loss in joint can then increase the temperature of connector；
2nd, bolt adds the weight of connector 25~50%, and the presence of bolt substantially increases the weight of junction portion；
3rd, mechanical be bolted needs substantial amounts of manual labor；
4th, contact resistance is unstable, and connector stably, low resistance connects, and reduces the possibility and dimension of equipment downtime maintenance
The duration of shield, reduces maintenance cost, greatly reduces the risk of catastrophic failure；
5th, it is identical in order to ensure to be bolted middle real contact area for the conductive copper sheet of different hardness, it is required
Pretightning force is also different；Meanwhile the size deviation of manpower pretightning force is all unfavorable for the control of contact area, copper sheet change is even resulted in
Shape；
6th, during being on active service, influenced by operating mode or load, the contact resistance between bolted copper sheet may increase.
Except the connection mode using bolt, company is fixed in two conductive copper sheets by the mode that can also use welding
Connect, the mode of this welding can ensure that electric conductivity reaches the 95%~98% of matrix copper electric conductivity.But it is this welding it is high-purity
The method of degree copper needs to use metal packing, perhaps also needs to reactivity solder flux, makees usually using ERCu red coppers or HS201 red coppers
Copper sheet end is welded for filling metal.Metal packing and the addition of solder flux can then reduce the electric conductivity of joint copper, together
Sample can also reduce the electric conductivity of copper sheet.ERCu red copper standards are used for arc welding, gas tungsten arc welding, Laser Welding
After wlding welding, the electric conductivity of copper will reduce 20~40MS/m.
The content of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide one kind need not use filler and solder flux, with regard to energy
Ensure the copper in nugget area keep 99.9% it is high-purity, and by the contact area between copper sheet composition surface from screwed joint
1% increases to the 20% of welding point, ensure that the packless high conductance of the high-purity of copper sheet, high conductivity and high conductivity
Rate anaerobic fine copper welder and welding method.
The purpose of the present invention is what is be achieved through the following technical solutions：A kind of packless high conductivity anaerobic fine copper weldering
Connection device, two horizontal positioned copper sheet one end to be welded is overlapped, the other end is as free end, in the upper copper of copper sheet overlap
Welding gun made of one ceramics of back-off above piece, welding gun inner hollow and opening down；
The electrode being internally provided with vertically downward of the welding gun, is fixed on the top surface of welding gun at the top of electrode, electrode
Bottom is in inverted conical, and the distance between the vertex of electrode base inverted cone and welding gun plane of the opening are 4~5mm；The top of electrode
Portion is connected by conducting wire with the anode of DC power supply, and the cathode of DC power supply connects the free end of lower copper sheet by conducting wire；
The electrode retaining sleeve of a cylindricality is socketed close to one end of bottom on the outside of electrode, electrode retaining sleeve passes through round aecidioid
Conductive sleeve is fixedly mounted in welding gun；The bottom surface of conductive sleeve is fixed by socket on the lateral wall of electrode retaining sleeve, the top of conductive sleeve
Portion is fixedly mounted on the top of welding gun；An air cavity for being used to store welding protection gas is formed between conductive sleeve and welding gun, is led
Be respectively equipped with the side wall of electricity set and bottom surface it is multiple be used to discharging the stomatas of welding protection gas, on the welding gun top surface at the top of air cavity
Equipped with least one conduit for being used to connect protective gas storage tank；
The outside of welding gun is equipped with welding gun control system, and welding gun control system includes controller, timer, controlling switch and electricity
Stream controller, current controller are connected with the anode of DC power supply, current controller, timer and controlling switch respectively with control
Device is connected.
The top of the welding gun is in cylinder, and the lower part of welding gun is in rounding mesa-shaped, and the opening of welding gun is located under inverted round stage
At plane, the opening diameter of welding gun is 17~19mm；The side of the inverted round stage of welding gun lower part is used for welding protection equipped with multiple
The ventilation window that gas passes through.
Further, the width of the copper sheet to be welded is 15~25.5mm, and thickness is 1~2mm；Upper and lower two to be welded
The lap of splice of copper sheet is 15~25mm；The copper sheet surface in non-overlapping region is covered using potsherd.
Further, the electrode is made of EWC or EWT20；A diameter of 2.4~3.2mm of electrode, electrode base circle
Cone-apex angle is 60 °~150 °.
Further, the welding protection gas is 99.99% argon gas of purity, 99.99% helium or argon gas and helium
The purity of the mixed gas of the mixed gas of gas, argon gas and helium is 99.99%.
Further, a control chamber is equipped with the top of the welding gun, the controller, timer and current controller are arranged on
In control chamber, controlling switch is arranged on the outer surface of control chamber.
It is a further object to provide a kind of packless high conductivity anaerobic fine copper welding method, including it is following
Step：
S1, pre-process copper sheet to be welded, then overlaps two copper sheet one end to be welded, and copper sheet is horizontal
Place, welding gun is held in the upper copper sheet upper surface of copper sheet overlap；
Before S2, welding start, 3~5s of welding protection gas is discharged in welding gun in advance；
S3, provide heat for copper sheet to be welded using DC power anode and input, and DC power cathode provides heat for electrode
Amount input, produces the electric arc that length is 4~5mm, the arc duration is 4~5s in the overlap of two copper sheets to be welded；Weldering
In termination process, release welding protection gas is always maintained at；
S4,15~25s of postwelding release welding protection gas.
Further, the open-circuit voltage of the DC power supply is 12~16V；DC power supply provide welding peak point current be
175~225 amperes, electric current is 0.2~0.5s from 0 time for bringing up to welding peak point current, and electric current is from welding after the completion of welding
It is 0.1~0.25s that peak value, which was reduced to for 0 time,.
Further the pretreatment concrete methods of realizing of the step S1 is：Copper sheet faying surface to be welded is beaten using sand paper
It is milled to flat smooth.
Further, in the step S2 and S4, the flow control of welding protection gas is 8~15L/min.
The beneficial effects of the invention are as follows：
1st, welder using the present invention, it is not necessary to using filler and solder flux, it is ensured that the copper in nugget area is kept
99.9% it is high-purity, the electric conductivity of the conductive contact of generation will not be reduced with the time；And by connecing between copper sheet composition surface
Contacting surface product increases to the 20% of welding point from the 1% of screwed joint, ensure that the high-purity of copper sheet, high conductivity and highly conductive
Property；
2nd, the weight of welding point is less than the weight of bolt joint；The shear strength of connector is higher than screwed joint：It is right
In the copper sheet that thickness is 1.2mm, the maximum tension shearing force of welding point is about 5KN, and screwed joint is 4.5KN；Relative to
Using other welding procedures of standard filling metal, the electric conductivity of copper of the present invention only reduces by 1.2~3MS/m, well below use
Fill the welding procedure of metal；
3rd, connector stably, low resistance connects, and the duration for reducing the possibility of equipment downtime maintenance and safeguarding, reduces
Maintenance cost, greatly reduces the risk of catastrophic failure；
4th, the device limits from the space of position, can be applied to small space etc. and is bolted inapplicable environment, machine
Device, material and facility are all that simple, commercially viable, required operation skill requirement is low, are readily modified as automation equipment, subtract
The cost of technical labour is lacked.
Brief description of the drawings
Fig. 1 is the high conductivity anaerobic fine copper welder structure diagram of the present invention；
Description of reference numerals：The upper copper sheets of 1-, copper sheet under 2-, 3- welding guns, 4- electrodes, 5- electrode retaining sleeves, 6- DC power supplies,
7- control chambers, 8- conductive sleeves, 9- air cavitys, 10- ventilation windows, 11- nuggets area.
Embodiment
Technical scheme is further illustrated below in conjunction with the accompanying drawings.
It is horizontal positioned to be welded by two as shown in Figure 1, a kind of packless high conductivity anaerobic fine copper welder
Copper sheet one end overlaps, and the other end is as free end, the welding gun 3 made of one ceramics of back-off above the upper copper sheet 1 of copper sheet overlap,
3 inner hollow of welding gun and opening down；
The electrode 4 being internally provided with vertically downward of the welding gun 3, the top of electrode 4 are fixed on the top surface of welding gun 3, electricity
The bottom of pole 4 is in inverted conical, and the distance between the vertex of 4 bottom inverted cone of electrode and 3 plane of the opening of welding gun are 4~5mm；Electricity
The top of pole 4 is connected by conducting wire with the anode of DC power supply 6, the cathode of DC power supply 6 by conducting wire connect lower copper sheet 2 from
By holding；The lower copper sheet 2 of cathode connection of DC power supply 6, to ensure that the electric current of welding flows to upper copper sheet 1 from electrode 4, then by connecing
Head is delivered to lower copper sheet 2；Initial can melt upper copper sheet 1 by electric current, and then heat will be transferred to lower copper sheet 2, then will
Lower copper sheet 2 also melts, upper and lower copper sheet junction formed one fall up-side down triangle nugget area 11；It can so ensure that copper sheet obtains
Maximum heat input is obtained, even copper thermal diffusivity is extremely strong (391W/mK), also can guarantee that its fusing, and need not preheat；
The electrode retaining sleeve 5 of a cylindricality is socketed close to one end of bottom in the outside of electrode 4, electrode retaining sleeve 5 passes through circle cup
The conductive sleeve 8 of shape is fixedly mounted in welding gun 3；The bottom surface of conductive sleeve 8 is fixed by socket on the lateral wall of electrode retaining sleeve 5, is led
The top of electricity set 8 is fixedly mounted on the top of welding gun 3；One is formed between conductive sleeve 8 and welding gun 3 to be used to store welding protection gas
The air cavity 9 of body, multiple stomatas for being used to discharge welding protection gas are respectively equipped with the side wall of conductive sleeve 8 and bottom surface, and air cavity 9 pushes up
The welding gun top surface in portion is equipped with least one conduit for being used to connect protective gas storage tank；
The outside of welding gun 3 is equipped with welding gun control system, welding gun control system include controller, timer, controlling switch and
Current controller, timer are used to control the time for producing electric arc, and current controller is used for size of current in control circuit；Electric current
Controller is connected with the anode of DC power supply 6, and current controller, timer and controlling switch are connected with controller respectively.
Further, the top of the welding gun 3 is in cylinder, and the lower part of welding gun 3 is in rounding mesa-shaped, the opening position of welding gun 3
At the lower plane of inverted round stage, the opening diameter of welding gun 3 is 17~19mm；The side of the inverted round stage of 3 lower part of welding gun is equipped with more
A ventilation window 10 passed through for welding protection gas.
Further, the width of the copper sheet to be welded is 15~25.5mm, and thickness is 1~2mm；Upper and lower two to be welded
The lap of splice of copper sheet is 15~25mm；The copper sheet surface in non-overlapping region is covered using potsherd, to reduce heat
Scatter and disappear.Electrode 4 is made of EWC or EWT20；A diameter of 2.4~3.2mm of electrode 4,4 bottom circular cone drift angle of electrode for 60 °~
150°。
Further, the welding protection gas is 99.99% argon gas of purity, 99.99% helium or argon gas and helium
The purity of the mixed gas of the mixed gas of gas, argon gas and helium is 99.99%.In welding process, exterior welding protection
Welding protection gas is sent into air cavity 9 by gas storage tanks by conduit, and air cavity 9 will be by will to the stomata set on conductive sleeve 8
Welding protection gas is discharged into welding gun 3, and atmosphere protection molten bath is produced inside welding gun 3, and unnecessary welding protection gas then leads to
Cross ventilation window 10 to flow out outside welding gun 3, the heat affected area of welding protected, ensure molten bath and heat affected area from oxidation and
The influence of hydrogen brittleness.
Further, the top of welding gun 3 is equipped with a control chamber 7, and the controller, timer and current controller are set
In control chamber 7, controlling switch is arranged on the outer surface of control chamber 7.
Present invention also offers a kind of packless high conductivity anaerobic fine copper welding method, comprise the following steps：
S1, pre-process copper sheet to be welded, then overlaps two copper sheet one end to be welded, and copper sheet is horizontal
Place, welding gun is held in the upper copper sheet upper surface of copper sheet overlap, welding gun should be protected always for the thrust on welding copper coin
Hold to welding and complete；
Before S2, welding start, 3~5s of welding protection gas is discharged in welding gun in advance；
S3, provide heat for copper sheet to be welded using DC power anode and input, and DC power cathode provides heat for electrode
Amount input, produces the electric arc that length is 4~5mm, the arc duration is 4~5s in the overlap of two copper sheets to be welded；Weldering
In termination process, release welding protection gas is always maintained at；
S4, when electric arc disconnects automatically, molten bath starts to solidify, this process still needs to the protection of argon gas, therefore postwelding release weldering
Meet 15~25s of protective gas.
Further, the open-circuit voltage of the DC power supply is 12~16V；DC power supply provide welding peak point current be
175~225 amperes, electric current is 0.2~0.5s from 0 time for bringing up to welding peak point current, and electric current is from welding after the completion of welding
It is 0.1~0.25s that peak value, which was reduced to for 0 time,.
Further, the pretreatment concrete methods of realizing of the step S1 is：Using sand paper by copper sheet faying surface to be welded
It is polishing to flat smooth.Preferably, first tentatively polished using the sand paper of any specification, then using 1000 mesh or 2000 mesh
Sand paper finally polished.Using other processing methods can make copper sheet it is smooth, it is smooth also can, be not limited to sand paper polishing side
Formula.
Further, in the step S2 and S4, the flow control of welding protection gas is 8~15L/min.
Tests prove that the parameter setting scope such as preferred electrode of the present invention, electric current, voltage, welding protection gas flow, energy
Enough ensure that arc force acts on copper sheet surface, will not go deep into below copper liquid face, ensure molten bath from too big electromagnetism blowing force.This hair
Bright welding point provides the real contact area of bigger between two pieces of copper sheets.The area of welding point is equivalent to overlap joint copper sheet
The 20% of overlap, in contrast, bolted contact area only have about 1%.
Device using the present invention welds two copper sheet overlaps, it is not necessary to uses filler and solder flux, Neng Goubao
The high-purity of the copper holding 99.9% in nugget area is demonstrate,proved, also ensures that high-purity, high conductivity and high conductivity.And this method
Conductive copper sheet need not be preheated, it is easy to operate.The conductivity in nugget area reduces about 1-2%, significantly larger than uses than original mother metal
Connector conductivity obtained by other welding methods of standard metal filler.
Those of ordinary skill in the art will understand that the embodiments described herein, which is to help reader, understands this hair
Bright principle, it should be understood that protection scope of the present invention is not limited to such special statement and embodiment.This area
Those of ordinary skill these disclosed technical inspirations can make according to the present invention and various not depart from the other each of essence of the invention
The specific deformation of kind and combination, these deform and combine still within the scope of the present invention.
Claims (10)
1. a kind of packless high conductivity anaerobic fine copper welder, it is characterised in that horizontal positioned to be welded by two
Copper sheet one end overlaps, and the other end is as free end, the welding gun made of one ceramics of back-off above the upper copper sheet (1) of copper sheet overlap
(3), welding gun (3) inner hollow and opening down；
The electrode (4) being internally provided with vertically downward of the welding gun (3), the top surface of welding gun (3) is fixed at the top of electrode (4)
On, the bottom of electrode (4) is in inverted conical, the distance between the vertex of electrode (4) bottom inverted cone and welding gun (3) plane of the opening
For 4~5mm；The top of electrode (4) is connected by conducting wire with the anode of DC power supply (6), and the cathode of DC power supply (6) is by leading
The free end of the lower copper sheet (2) of line connection；
The electrode retaining sleeve (5) of a cylindricality is socketed close to one end of bottom on the outside of electrode (4), electrode retaining sleeve (5) passes through circle
The conductive sleeve (8) of cup-shaped is fixedly mounted in welding gun (3)；The bottom surface of conductive sleeve (8) is fixed by socket in the outer of electrode retaining sleeve (5)
On side wall, the top of welding gun (3) is fixedly mounted at the top of conductive sleeve (8)；One is formed between conductive sleeve (8) and welding gun (3)
For storing the air cavity (9) of welding protection gas, it is respectively equipped with the side wall of conductive sleeve (8) and bottom surface multiple for discharging welding
The stomata of protective gas, the welding gun top surface at the top of air cavity (9), which is equipped with, at least one to be used to connect leading for protective gas storage tank
Pipe；
The outside of welding gun (3) is equipped with welding gun control system, and welding gun control system includes controller, timer, controlling switch and electricity
Stream controller, current controller are connected with the anode of DC power supply (6), current controller, timer and controlling switch respectively with
Controller is connected.
2. a kind of packless high conductivity anaerobic fine copper welder according to claim 1, it is characterised in that described
The top of welding gun (3) is in cylinder, and the lower part of welding gun (3) is in rounding mesa-shaped, and the opening of welding gun (3) is located at the lower plane of inverted round stage
Place, the opening diameter of welding gun (3) is 17~19mm；The side of the inverted round stage of welding gun (3) lower part is equipped with multiple for welding guarantor
The ventilation window (10) that shield gas passes through.
3. a kind of packless high conductivity anaerobic fine copper welder according to claim 1, it is characterised in that described
The width of copper sheet to be welded is 15~25.5mm, and thickness is 1~2mm；The lap of splice of upper and lower two copper sheets to be welded for 15~
25mm；The copper sheet surface in non-overlapping region is covered using potsherd.
4. a kind of packless high conductivity anaerobic fine copper welder according to claim 1, it is characterised in that described
Electrode (4) is made of EWC or EWT20；A diameter of 2.4~3.2mm of electrode (4), electrode (4) bottom circular cone drift angle are 60 °
~150 °.
A kind of 5. packless high conductivity anaerobic fine copper welder according to claim 1 or 5, it is characterised in that
The welding protection gas is 99.99% argon gas of purity, 99.99% helium or the mixed gas of argon gas and helium, argon gas
Purity with the mixed gas of helium is 99.99%.
6. a kind of packless high conductivity anaerobic fine copper welder according to claim 1, it is characterised in that described
A control chamber (7) is equipped with the top of welding gun (3), the controller, timer and current controller are arranged in control chamber (7), control
Switch processed is arranged on the outer surface of control chamber (7).
A kind of 7. packless high conductivity anaerobic fine copper welding method as claimed in claim 1, it is characterised in that including with
Lower step：
S1, pre-process copper sheet to be welded, then overlaps two copper sheet one end to be welded, and copper sheet level is put
Put, welding gun is held in the upper copper sheet upper surface of copper sheet overlap；
Before S2, welding start, 3~5s of welding protection gas is discharged in welding gun in advance；
S3, provide heat for copper sheet to be welded using DC power anode and input, and it is defeated that DC power cathode for electrode provides heat
Enter, produce the electric arc that length is 4~5mm in the overlap of two copper sheets to be welded, the arc duration is 4~5s；Welded
Cheng Zhong, is always maintained at release welding protection gas；
S4,15~25s of postwelding release welding protection gas.
8. a kind of packless high conductivity anaerobic fine copper welding method according to claim 8, it is characterised in that described
The open-circuit voltage of DC power supply is 12~16V；The welding peak point current that DC power supply provides is 175~225 amperes, and electric current is from 0
Bring up to welding peak point current time be 0.2~0.5s, after the completion of welding electric current from welding peak value be reduced to 0 time be 0.1~
0.25s。
9. a kind of packless high conductivity anaerobic fine copper welding method according to claim 8, it is characterised in that described
The pretreatment concrete methods of realizing of step S1 is：Copper sheet faying surface to be welded is polishing to by flat smooth using sand paper.
A kind of 10. packless high conductivity anaerobic fine copper welding method according to claim 8, it is characterised in that institute
State in step S2 and S4, the flow control of welding protection gas is 8~15L/min.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108994431A (en) * | 2018-09-10 | 2018-12-14 | 广州智能装备研究院有限公司 | Intelligent bus bar copper row welding procedure |
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