CN106181021A - A kind of electric current auxiliary friction post/tapered plug welding method and frock thereof - Google Patents
A kind of electric current auxiliary friction post/tapered plug welding method and frock thereof Download PDFInfo
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- CN106181021A CN106181021A CN201610761282.6A CN201610761282A CN106181021A CN 106181021 A CN106181021 A CN 106181021A CN 201610761282 A CN201610761282 A CN 201610761282A CN 106181021 A CN106181021 A CN 106181021A
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- stopper
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- power supply
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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
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
- B23K20/122—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding
-
- 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
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
- B23K20/122—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding
- B23K20/1245—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding characterised by the apparatus
-
- 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
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
- B23K20/122—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding
- B23K20/1245—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding characterised by the apparatus
- B23K20/126—Workpiece support, i.e. backing or clamping
-
- 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
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/26—Auxiliary equipment
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
The invention discloses a kind of electric current auxiliary friction post/tapered plug welding method, step is as follows: according to the technological requirement of friction plug weld, use the cylindric or stopper of frustum, at the prefabricated consent in workpiece region to be welded；Frock clamping stopper and workpiece, consent and stopper is utilized to keep coaxial；Start welding machine and accessory power supply, applying axial force while stopper rotates, form galvanic circle between accessory power supply, stopper, workpiece, conducting block, stopper end material is rapidly reached hot plastic state under frictional heat with resistance heat effect, simultaneously, under Thermal-mechanical Coupling effect, plastic material fills gap, along with the carrying out of welding process to surrounding transfer, this gap is filled, after upset completes, close accessory power supply and welding machine, so far complete electric current auxiliary friction post/tapered plug welding.The present invention can reduce the requirement to frictional heat, thus reduces the requirement to welding equipment dynamic system；Plug weld microstructure and mechanical property can be improved；Welding parameter can be widened.
Description
Technical field
The invention belongs to solid phase Friction welding technique field, be specifically related to the new of a kind of electric current and solid phase friction composite heat power supply
Type friction column/tapered plug welding method.
Background technology
Friction column/tapered plug weldering is that the novel solid phase of one proposed based on Continuous Drive Friction Welding and arc stud welding welding process connects
Connection technology, in invention in 1992 and has been applied for patent by Britain's institute of welding.Its ultimate principle is: on mother metal prefabricated one
Consent to be welded, keeps concentric by diameter less than the expendable stopper material of consent and consent, and high speed rotating, simultaneously at plug
Apply certain axial compressive force on rod and move bottom consent, when rotation stopper is with when contacting bottom consent, starting friction and cut
Cut exothermal process.Under Thermal-mechanical Coupling acts on jointly, the expendable stopper on frictional interface is in hot plastic state, simultaneously to four
Week shifts and fills the radial clearance between stopper and consent inwall, and ductile bed is due to by mother metal heat radiation and cooling deposition shape
Become dynamic recrystallization sedimentary.In whole welding process, the generation speed of ductile bed is higher than the feed rate of stopper, therefore,
Rubbing surface persistently will rise along stopper, and consent is constantly filled by dynamic recrystallization sedimentary, finally realize combining closely with mother metal.
Different from stopper geometry according to consent, two classes, i.e. friction circle plunger weldering (Friction Hydro can be classified as
Pillar Processing, FHPP) and friction cone plug welding (Friction Taper Plug Welding, FTPW).Multiple
Friction column/tapered plug weld seam be mutually superposed side by side just define friction column/tapered plug seam welding (Friction Stitch Welding,
FSW), can be used for repairing long dimensional defects.
Friction column/tapered plug soldering set has the advantage that (1) a kind of " green " welding method, and smoke dust splashes, without arc light and spoke
Penetrate generation；(2) solid-state connects, and thermal deformation and residual stress are little, is prevented effectively from hydrogen induced cracking, pore, the melting welding defect such as is mingled with, can
To realize Underwater Welding；(3) plug weld low cost of manufacture, it is not necessary to solder flux and protective gas；(4) all-position welding can be carried out,
Can remotely control, it is easy to accomplish automatization, welding efficiency is high, and welding point is repeatable strong.Therefore, friction column/tapered plug weldering
Obtain industrial circle extensive concern, especially in such as ocean engineering field, some special application scenarios, there is prominent advantage.
First, friction column/tapered plug weld seam, can be used to repair the various weld defects owing to welding process produces, it repaiies
Multiple effect is better than original melting welding reparation, terminates shrinkage pool that end stays and various due to stirring tool for repairing stirring friction welding seam
Stirring friction welding seam local defect, it is also possible to be used for repairing the outer tank welding point defect of space shuttle, marine propeller and oil
Gas storage tank various local corrosion defect；Secondly, be friction stub weldering when stopper becomes bolt, may be used for sea risers and
The stud welding of floating production storage unit sacrificial anode；Finally, friction column/tapered plug welding technology can be used for underwater steel construction thing
Welding and local route repair, nuclear industry field boiled water reactor and the emergent local route repair on high steam pipeline surface, moreover it is possible to use
Modified in the friction surfacing of part surfaces externally and internally.
Conventional friction post/tapered plug is welded in application process and there are some problems: (1) is high to welding equipment requirements, needs to carry
Supply high welding rotating speed and larger axis to pressure, cause the adjustable scope of welding procedure narrower；(2) welding starts due to suffered
Load is excessive, causes welding moment of torsion and rises rapidly, easily causes welding machine stuck because of overload；(3) plug weld bottom roundings transition
Place's superplastic material flow is abundant, owing to frictional heat source deficiency easily produces non-seam defect not；(4) continue due to welding process
Time is shorter, and welding rate of cooling is very fast, causes likely producing thick organizational structure inside whole plug weld and makes in hardness
Rise plasticity to decline, plug weld mechanical property and plastic deformation are had a negative impact.
Summary of the invention
For prior art, the present invention provides a kind of electric current auxiliary friction post/tapered plug welding method, uses the present invention peculiar
Frock, after connecting an accessory power supply, accessory power supply, on conducting block, stopper, between workpiece and lower conducting block formed conduction
Loop；The big function of current is applied so that stopper frictional interface is at frictional heat source and contact resistance thermal source between stopper and workpiece
Form plug weld under common effect, thus realize electric current auxiliary friction post/tapered plug welding process.
In order to solve above-mentioned technical problem, a kind of frock for electric current auxiliary friction plug welding that the present invention proposes, including
Stopper fixture, work piece holder and accessory power supply, described stopper fixture includes metal sleeve, described metal sleeve opening down,
The top of described metal sleeve is provided with the cylindrical rod coordinated with welding machine collar bush, welding machine chuck, along the inwall of described metal sleeve
Being provided with ebonite bush, be provided with stopper chuck in described ebonite bush, described stopper chuck is by metal chuck and collet
Constitute；It is provided with conducting block, along described metal sleeve between top and the top of described ebonite bush of described metal chuck
It is provided with the first through hole with the axial center of ebonite bush；The upper end of described through hole connects with the centre bore of described welding machine collar bush
Logical；Described work piece holder includes workpiece box and the stationary fixture of insulant, and the substrate of described workpiece box is provided with lower conduction
Block；The sidewall of described workpiece box is provided with the second through hole；Lead to respectively on the anelectrode and negative electrode of described accessory power supply
First cable and the second cable, described first cable sequentially pass through welding machine collar bush endoporus, the endoporus of welding machine chuck and
Described first through hole is connected to conducting block；Described second cable is connected to lower conducting block by the second through hole；Stopper fixture
Clamping stopper and work piece holder clamping workpiece after, when connect accessory power supply, from described first cable, successively through upper conducting block,
Stopper, workpiece, lower conducting block form primary Ioops to described second cable.
Further, the area of described upper conducting block and lower conducting block is all higher than the horizontal projected area of consent on workpiece.
Described accessory power supply, according to the technological requirement of friction plug weld, selects AC arc welding power source, electricity source for dc arc welding, inversion
One in formula Arc Welding Power and pulsed arc-welding power source.
The above-mentioned frock for electric current auxiliary friction plug welding utilizing the present invention realizes electric current auxiliary friction post/tapered plug welding
Method, comprises the following steps:
Step one, according to the technological requirement of friction plug weld, use bottom or foreign material processing of the same race with workpiece as circle
Column or the stopper of frustum, at the prefabricated consent coordinated with stopper in the region to be welded of workpiece, clean stopper and consent
Totally；
Step 2, utilization are as claimed in claim 1 for frock clamping stopper on welding machine of electric current auxiliary friction plug welding
And workpiece, wherein, the area of described upper conducting block is more than the contact area between upper conducting block and described stopper；Lower conducting block
Area is more than the contact area on stopper and workpiece between consent；Described lower conducting block be positioned at workpiece and workpiece box upper surface it
Between；The axis of the consent on described workpiece and the dead in line of described stopper；
Step 3, one end of the first cable pass the endoporus of welding machine collar bush, the endoporus of welding machine chuck and described first
It is connected with upper conducting block after through hole；One end of second cable through workpiece box sidewall the second through hole after be positioned at bottom workpiece
Lower conducting block connect；The other end of the first cable and the second cable is connected to accessory power supply, described accessory power supply according to
The technological requirement of friction plug weld, selects AC arc welding power source, electricity source for dc arc welding, inverter arc welding power source and pulsed arc-welding power source
In one, i.e. according to friction plug weld technological requirement, therefrom select suitably a kind of power supply of galvanic properties and size of current；
Step 4, on welding machine and accessory power supply, set technological parameter, start welding machine and accessory power supply, treat stopper turn up
After preset value, applying axial force on stopper, meanwhile, stopper moves to consent bottom direction vertically；When stopper and consent
Bottom contact time, accessory power supply, between conducting block, stopper, workpiece, lower conducting block formed galvanic circle；In stopper and work
At frictional interface between the consent of part, resistance heat acts on the common of frictional heat, and the end material of stopper is in rapidly thermoplasticity
State, meanwhile, under Thermal-mechanical Coupling acts on jointly, plastic material fills the gap between stopper and consent to surrounding transfer,
Along with the carrying out of welding process, this gap is filled, and after the upset stage completes, closes accessory power supply and welding machine, the completeest
Become electric current auxiliary friction post/tapered plug welding.
Compared with prior art, the invention has the beneficial effects as follows:
(1) present invention is a kind of simple and effective electric current householder method, it is possible to ensure to produce reliable and stable resistance heat.?
Under the assosting effect of resistance heat, reduce the technological requirement of friction column/tapered plug weldering, reduce the power demand of welding equipment.
(2) present invention both can carry out auxiliary heating to friction column/tapered plug weldering, it is also possible to carries out weld preheating and postwelding heat
Process.Therefore, it can reduce the generation of weld defect, especially because shortage of heat causes material plastic flow state insufficient
The defects such as caused is not filled by, non-seam.Thus, improve welding quality further, improve the mechanical property of welding point.
(3) optional equipment is simple, and cost is relatively low, and beneficially electric current auxiliary friction post/tapered plug welding method is promoted and application,
There is vast potential for future development.
Accompanying drawing explanation
Fig. 1 is the schematic diagram using cylindric stopper to realize the welding of electric current auxiliary friction plunger；
Fig. 2 is the schematic diagram using frustum stopper to realize the welding of electric current auxiliary friction plunger.
In figure:
1-welding machine collar bush, 2 welding machine chucks, the upper conducting block of 31-, conducting block under 32-, 4-metal sleeve, 41-cylinder
Rod, 5-ebonite bush, 6-metal chuck, 7-collet, 8-stopper, 9-stationary fixture, 10-workpiece, 11-workpiece box, 12-
Workbench, 131-the first cable, 132-the second cable, 14-accessory power supply, 15-consent, arrow I represents axial compressive force side
To, arrow II represents stopper direction of rotation.
Detailed description of the invention
Being described in further detail technical solution of the present invention with specific embodiment below in conjunction with the accompanying drawings, described is concrete
The present invention is only explained by embodiment, not in order to limit the present invention.
The mentality of designing of the present invention is, is passed through electric current the friction at stopper Yu workpiece jack contact in the weld zone of workpiece
Interface produces resistance heat, and this resistance heat and frictional heat form the composite heat power supply of friction column/tapered plug weldering process, thus realize electric current
Auxiliary friction post/tapered plug welding process.Realize producing the measure of resistance heat mainly: by accessory power supply electrode by electricity
Cable is connected on the upper conducting block contacted with stopper, and the another one electrode of accessory power supply is connected on by cable and welds workpiece
On the lower conducting block being connected, and make to insulate between stopper and welding machine collar bush and welding machine chuck and between workpiece and workbench,
Form galvanic circle between accessory power supply, stopper and workpiece, can produce at the stopper frictional contact surface with the consent of workpiece
Resistance heat.It addition, in order to ensure that electric current ceiling effect acts on plug weld region, upper and lower conducting block is separately designed on stopper
Back of work (i.e. the upper surface of workpiece box) between metal chuck center and the insulating bushing of side and bottom consent, and will
The area design of conducting block is the projected area more than plug weld so that electric current flow through to greatest extent plug weld region rather than
Short circuiting transfer is to surface of the work region.
As depicted in figs. 1 and 2, a kind of frock for electric current auxiliary friction plug welding proposed in the present invention, including stopper
Fixture, work piece holder and accessory power supply 14.
Described stopper fixture includes metal sleeve 4, described metal sleeve 4 opening down, the top of described metal sleeve 4
Being provided with the cylindrical rod 41 coordinated with welding machine collar bush 1 and welding machine chuck 2, the inwall along described metal sleeve 4 is provided with hard rubber lining
Set 5, is provided with stopper chuck in described ebonite bush 5, described stopper chuck is made up of metal chuck 6 and collet 7；Described
Stopper fixture uses three layers of composition, respectively by metal sleeve 4 ebonite bush 5 high intensity of high intensity from outer layer to nexine
Metal chuck 6, mutually nested by mechanical force.And at the top of described metal chuck 6 and described ebonite bush 5
Top between be provided with conducting block 31, the axial center along described metal sleeve 4 and ebonite bush 5 be provided with first lead to
Hole；The upper end of described through hole connects to coordinate with welding machine chuck 2 with the centre bore of described welding machine collar bush 1 and can form independent plug
Rod clamping device, can proof strength, again can with welding machine collar bush, welding machine chuck insulation, be fixed on welding machine collar bush,
Just can realize electric current auxiliary welding.
Described work piece holder includes workpiece box 11 and the stationary fixture 9 of insulant, the substrate of described workpiece box 11
Being provided with lower conducting block 32, the area of described upper conducting block 31 and lower conducting block 32 is all higher than the horizontal plane of consent on workpiece 10
Long-pending so that electric current flows through plug weld region rather than short circuiting transfer to greatest extent to surface of the work region, described workbox 11
Sidewall is provided with the second through hole.The insulated working case 11 (groove) used and insulating fixing clamp tool 9 to have certain mechanical force
Learn performance and heat stability, and ensure completely insulated.Therefore, insulated working case 11 can use sandwich, i.e. by high-strength
The metal of the metallic hard rubber high-strength degree of degree is mutually nested and constitutes.Stationary fixture 9 can be by hard rubber and high intensity
Metal is constituted, and is bolted and just can be fixed workpiece 10, makes workpiece 10 and workbench 12 in whole welding process
Insulation.
In the present invention, the upper and lower conducting block 31 and 32 used to have good electric conductivity, can select circular copper material
Material, and matching with the perspective plane of plug weld, and workpiece and and be used for clamping between the metal chuck of stopper and to keep good
Contact.Meanwhile, escaping into non-solder district to reduce electric current, the area of upper and lower conducting block 31 and 32 only to be slightly greater than consent
Projected area.
Described accessory power supply, according to the technological requirement of friction plug weld, selects AC arc welding power source, electricity source for dc arc welding, inversion
One in formula Arc Welding Power and pulsed arc-welding power source, such that it is able to provide bigger electric current.From described accessory power supply 14 just
The first cable 131 and the second cable 132, described first cable 131 warp successively is led to respectively on electrode and negative electrode
Cross welding machine collar bush 1 endoporus, the endoporus of welding machine chuck 2 and described first through hole and be connected to conducting block 31；Described second cable
Line 132 is connected to lower conducting block 32 by the second through hole；After stopper holder stopper 8 and work piece holder clamping workpiece 10, when
Connect accessory power supply 14, from described first cable 131, successively through upper conducting block 31, stopper 8, workpiece 10, lower conducting block 32 to
Described second cable 132 forms primary Ioops.
In the present invention for the aperture by the first through hole of cable and the second through hole all with cable to be passed through
The circular hole that matches of diameter, metal chuck 6 that the first cable 131 through circular hole and is arranged in stopper fixture and insulation lining
Between set 5, the upper conducting block 31 of center connects, the second cable 132 and the lower conducting block 32 at consent 15 underlying workpiece 10 back side
Connect, high-speed rotation can be avoided and the problem that causes cable to be wound around.
Utilize the above-mentioned frock for electric current auxiliary friction plug welding, in that context it may be convenient to realize electric current auxiliary friction post/tapered plug
Welding method, mainly comprises the steps that
Step one, according to the technological requirement of friction plug weld, use bottom or foreign material processing of the same race with workpiece as circle
The stopper 8 of column or frustum, the prefabricated consent 15 coordinated with stopper 8 in the region to be welded of workpiece 10, by stopper 8 and plug
Hole 15 cleans up；
Step 2, utilization are as claimed in claim 1 for frock clamping stopper 8 on welding machine of electric current auxiliary friction plug welding
With workpiece 10, wherein, the area of described upper conducting block 31 and lower conducting block 32 is all higher than the horizontal plane of consent on workpiece 10
Long-pending；Described lower conducting block 32 is between the upper surface of workpiece 10 and workpiece box 11；The axis of the consent 15 on described workpiece 10
Dead in line with described stopper 8；
Step 3, the first cable 131 one end through the endoporus of welding machine collar bush 1, the endoporus of welding machine chuck 2 and described
It is connected with upper conducting block 31 after first through hole；One end of second cable 132 through workpiece box 11 sidewall the second through hole after with
It is positioned at the lower conducting block 32 bottom workpiece 10 to connect；The other end of the first cable 131 and the second cable 132 is connected to auxiliary
Power supply 14, described accessory power supply, according to the technological requirement of friction plug weld, selects AC arc welding power source, electricity source for dc arc welding, inversion
One in formula Arc Welding Power and pulsed arc-welding power source.
Step 4, to be installed clamping surely complete after, welding machine and accessory power supply 14 set technological parameter, start welding machine and auxiliary
Help power supply, make stopper 8 high speed rotating, after stopper 8 rotating speed reaches preset value, stopper 8 applies axial force, meanwhile, stopper 8
Move to consent 15 bottom direction vertically；When stopper 8 with when contacting bottom consent 15, accessory power supply 14, on conducting block 31,
Galvanic circle is formed between stopper 8, workpiece 10, lower conducting block 32；According to contact resistance maximum principle, in stopper 8 and friction
The resistance of interface is maximum, produces substantial amounts of resistance heat.Resistance at frictional interface between the consent 15 of stopper 8 and workpiece 10
Heat acts on the common of frictional heat, and the end material of stopper 8 is in rapidly hot plastic state, jointly makees in Thermal-mechanical Coupling meanwhile
Under with, plastic material fills the gap between stopper 8 and consent 15, owing to being deposited by mother metal heat radiation and cooling to surrounding transfer
Effect forms dynamic recrystallization sedimentary.Along with the carrying out of welding process, this gap is constantly filled, and completes when the upset stage
Afterwards, accessory power supply 14 should be closed immediately, then, stop welding machine, so far complete electric current auxiliary friction post/tapered plug welding.Will plug
Rod 8 is unloaded down from stopper fixture, lays down fixture, removes work piece holder, machines away stopper material unnecessary on workpiece, can be complete
Become the whole course of processing.
Comparing with conventional friction post/tapered plug Welding, the method has following obvious characteristic: (1) can reduce friction
The requirement of heat, thus reduce the requirement to welding equipment dynamic system and device fabrication cost；(2) can improve bottom weld seam and rub
Wipe heat source insufficiency and easily produce the unfavorable factor of defect, thus improve plug weld organizational structure and mechanical property；(3) can widen
The welding parameter of the material such as ferrous metal, high temperature alloy.
In conjunction with Fig. 1, the weldering of electric current auxiliary friction plunger is used to describe this for embodiment with the X65 pipe line steel thick to 35mm below
Invention welding method.
First, a prefabricated diameter 11mm in workpiece 10 position to be welded, the cylindric consent of high 20mm, then by surface and oil contaminant
Clean up with abrasive particle and chip.The cylindric X65 stopper 8 using a diameter of 10mm is matched.Conducting block 31 He up and down
32 all select discoid copper product, accessory power supply 14 to select IGBT arc welding rectifier, with the first cable 131 by upper conducting block
31 are connected with accessory power supply 14, are coupled together by lower conducting block 32 with the second cable 132.According to shown in Fig. 1 by stopper fixture
Install in place with work piece holder, and stopper 8 and workpiece 10 are carried out clamping and assembling.
After clamping and assembling terminate, stopper 8 is made to keep coaxial with consent 15, at friction column plug welding machine and accessory power supply 14
The various relevant parameter of upper setting.Wherein, if: the rotating speed of stopper 8 is 5000 7500rmp, and axial compressive force is 20 40KN, auxiliary
Electric current is 300 700A.Parameter set by the present embodiment is: stopper rotating speed 6500rmp, axial compressive force 30KN, auxiliary current
400A.Start friction column plug welding machine and accessory power supply 14, make stopper 8 high speed rotating, after rotating speed reaches 6500rmp, at stopper 8
Upper applying 30KN axial compressive force (as shown in arrow I downward in Fig. 1) so that it is axially move to consent bottom direction along consent 15
Dynamic.
When the bottom of stopper 8 with consent 15 contacts, by the connection of first and second cable 131 and 132, at auxiliary electricity
Galvanic circle is formed between source 14, stopper 8, the consent 15 of workpiece 10 and upper and lower conducting block 31 and 32.According to contact resistance
Big principle, the resistance at stopper 8 and frictional interface is maximum, produces substantial amounts of resistance heat, and friction column plug welding is not only entered by resistance heat
Row auxiliary heating, carries out again weld preheating and post weld heat treatment.Under common effect by resistance heat and frictional heat, stopper end
Material is in rapidly hot plastic state.Meanwhile, under Thermal-mechanical Coupling acts on jointly, plastic material fills stopper to surrounding transfer
And the gap between consent, owing to being formed dynamic recrystallization sedimentary by mother metal heat radiation and cooling deposition.Along with welding
The carrying out of journey, constantly fills up consent, after the upset stage completes, closes accessory power supply immediately, then stops friction column
Plug welding machine, thus realize the welding of electric current auxiliary friction plunger.
Stopper 8 is unloaded down from stopper fixture, and lays down stopper and work piece holder, remove adnexa, machine away workpiece 10
Upper unnecessary stopper 8 material, can complete the whole course of processing.After testing, electric current auxiliary friction plunger of the present invention welding is used
Method, takes less welding rotating speed and axial compressive force, it is possible to obtain that molding is good and the welding point of good mechanical performance.
The application example of described above is not limited to X65 pipe line steel material, it is also possible to is applied to other kinds material and carries out
Electric current auxiliary friction plunger welds.
Electric current auxiliary friction tapered plug welding method and the cylinder shown in Fig. 1 for the frustum stopper rod nozzle shown in Fig. 2
The principle of the electric current auxiliary friction plunger welding method of shape stopper rod nozzle is just the same.Therefore, no longer it is described in detail.
Although above in conjunction with accompanying drawing, invention has been described, but the invention is not limited in above-mentioned being embodied as
Mode, above-mentioned detailed description of the invention is only schematic rather than restrictive, and those of ordinary skill in the art is at this
Under the enlightenment of invention, without deviating from the spirit of the invention, it is also possible to make many variations, these belong to the present invention's
Within protection.
Claims (4)
1., for a frock for electric current auxiliary friction plug welding, including stopper fixture, work piece holder and accessory power supply (14), it is special
Levy and be:
Described stopper fixture includes metal sleeve (4), described metal sleeve (4) opening down, the top of described metal sleeve (4)
Portion is provided with the cylindrical rod (41) coordinated with welding machine collar bush (1) and welding machine chuck (2), and the inwall along described metal sleeve (4) sets
Having ebonite bush (5), be provided with stopper chuck in described ebonite bush (5), described stopper chuck is by metal chuck (6) and bullet
Spring chuck (7) is constituted；It is provided with conducting block between top and the top of described ebonite bush (5) of described metal chuck (6)
(31), the axial center along described metal sleeve (4) and ebonite bush (5) is provided with the first through hole；Described first through hole
Upper end connects with the centre bore of described welding machine collar bush (1)；
Described work piece holder includes workpiece box (11) and the stationary fixture (9) of insulant, on the base plate of described workpiece box (11)
Face is provided with lower conducting block (32)；The sidewall of described workpiece box (11) is provided with the second through hole；
The first cable (131) and the second cable is led to respectively on the anelectrode and negative electrode of described accessory power supply (14)
(132), described first cable (131) sequentially passes through welding machine collar bush (1) endoporus, the endoporus of welding machine chuck (2) and described
One through hole is connected to conducting block (31)；Described second cable (132) is connected to lower conducting block (32) by the second through hole；Plug
After rod clamp clamping stopper (8) and work piece holder clamping workpiece (10), when connecting accessory power supply (14), from described first cable
(131), successively through upper conducting block (31), stopper (8), workpiece (10), lower conducting block (32) to described second cable (132) shape
Become primary Ioops.
The most according to claim 1 for the frock of electric current auxiliary friction plug welding, it is characterised in that described upper conducting block (31)
With the horizontal projected area that the area of lower conducting block (32) is all higher than the upper consent (15) of workpiece (10).
The most according to claim 1 for the frock of electric current auxiliary friction plug welding, it is characterised in that described accessory power supply is to hand over
One in stream Arc Welding Power, electricity source for dc arc welding, inverter arc welding power source and pulsed arc-welding power source.
4. electric current auxiliary friction post/tapered plug welding method, it is characterised in that comprise the following steps:
Step one, according to the technological requirement of friction plug weld, uses or foreign material of the same race with workpiece process bottom be cylindric
Or the stopper (8) of frustum, the prefabricated consent (15) coordinated with stopper (8) in the region to be welded of workpiece (10), by stopper
(8) clean up with consent (15)；
Step 2, utilize as claimed in claim 1 for the frock of electric current auxiliary friction plug welding on welding machine clamping stopper (8) and
Workpiece (10), wherein, the area of described upper conducting block (31) and lower conducting block (32) is all higher than the upper consent (15) of workpiece (10)
Horizontal projected area；Described lower conducting block (32) is positioned between the upper surface of workpiece (10) and workpiece box (11)；Described workpiece
(10) axis of the consent (15) on and the dead in line of described stopper (8)；
Step 3, one end of the first cable (131) pass the endoporus of welding machine collar bush (1), the endoporus of welding machine chuck (2) and institute
It is connected with upper conducting block (31) after stating the first through hole；One end of second cable (132) is through the second of workpiece box (11) sidewall
It is connected with the lower conducting block (32) being positioned at workpiece (10) bottom after through hole；First cable (131) and the second cable (132)
The other end is connected to accessory power supply (14), described accessory power supply according to the technological requirement of friction plug weld, select AC arc welding power source,
One in electricity source for dc arc welding, inverter arc welding power source and pulsed arc-welding power source；
Step 4, on welding machine and accessory power supply (14), set technological parameter, start welding machine and accessory power supply, treat that stopper (8) turns
After speed reaches preset value, applying axial force on stopper (8), meanwhile, stopper (8) moves to consent (15) bottom direction vertically
Dynamic；When stopper (8) contacts with consent (15) bottom, at accessory power supply (14), upper conducting block (31), stopper (8), workpiece
(10), galvanic circle is formed between lower conducting block (32)；Frictional interface between the consent (15) of stopper (8) and workpiece (10)
Place's resistance heat acts on the common of frictional heat, and the end material of stopper (8) is in rapidly hot plastic state, meanwhile, in thermo-mechanical Coupled
Amounting under same-action, plastic material fills the gap between stopper (8) and consent (15), along with welding process to surrounding transfer
Carrying out, this gap is filled, and after the upset stage completes, closes accessory power supply (14) and welding machine, so far completes electric current auxiliary
Help friction column/tapered plug welding.
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| CN106181021B CN106181021B (en) | 2018-08-10 |
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| CN106735850A (en) * | 2016-12-26 | 2017-05-31 | 南京航空航天大学 | It is adapted to titanium alloy plate gap weld attachment means and method |
| CN106870522A (en) * | 2017-03-10 | 2017-06-20 | 南京航空航天大学 | It is a kind of that structure and method that component is connected are realized by friction hydro pillar processing |
| CN109396743A (en) * | 2018-10-24 | 2019-03-01 | 国网天津市电力公司电力科学研究院 | A kind of field repairing method suitable for UHV transmission line steel pipe tower crack |
| CN109551097A (en) * | 2018-12-10 | 2019-04-02 | 上海航天设备制造总厂有限公司 | A kind of static shaft shoulder friction stir welding method of the coaxial added material of bevel |
| CN111618420A (en) * | 2020-07-07 | 2020-09-04 | 北京工业大学 | Method and equipment for weakening texture of magnesium alloy friction stir welding joint |
| CN112139656A (en) * | 2020-09-30 | 2020-12-29 | 中国兵器工业第五九研究所 | Current-assisted friction additive manufacturing device and method |
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| CN112388147A (en) * | 2019-08-13 | 2021-02-23 | 波音公司 | Method and vessel for loading feedstock rods into an additive friction stir deposition machine |
| CN111618420A (en) * | 2020-07-07 | 2020-09-04 | 北京工业大学 | Method and equipment for weakening texture of magnesium alloy friction stir welding joint |
| CN112139656A (en) * | 2020-09-30 | 2020-12-29 | 中国兵器工业第五九研究所 | Current-assisted friction additive manufacturing device and method |
| CN114734118A (en) * | 2022-02-24 | 2022-07-12 | 华南理工大学 | Micro-area strong-drainage tungsten TIG (tungsten inert gas) welding torch for underwater local dry operation |
| CN114734118B (en) * | 2022-02-24 | 2023-12-22 | 华南理工大学 | Micro-area strong drainage tungsten electrode TIG welding torch for underwater local dry operation |
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