CN106181021B - A kind of electric current auxiliary friction column/tapered plug welding method and its tooling - Google Patents
A kind of electric current auxiliary friction column/tapered plug welding method and its tooling Download PDFInfo
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- CN106181021B CN106181021B CN201610761282.6A CN201610761282A CN106181021B CN 106181021 B CN106181021 B CN 106181021B CN 201610761282 A CN201610761282 A CN 201610761282A CN 106181021 B CN106181021 B CN 106181021B
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- stopper
- welding
- workpiece
- conducting block
- power supply
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- 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
Abstract
The invention discloses a kind of electric current auxiliary friction column/tapered plug welding methods, and steps are as follows：According to the technological requirement of friction plug weld, using cylindric or pyramidal stopper, in the prefabricated consent in workpiece region to be welded；Using frock clamping stopper and workpiece, consent keeps coaxial with stopper；Start welding machine and accessory power supply, apply 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 and resistance heat effect, simultaneously, under Thermal-mechanical Coupling effect, plastic material shifts and fills gap around, with the progress of welding process, the gap is filled, after the completion of upset, accessory power supply and welding machine are closed, so far completes electric current auxiliary friction column/tapered plug welding.The present invention can reduce the requirement to frictional heat, to reduce 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 fields, and in particular to a kind of electric current is new with solid phase friction composite heat power supply
Type friction column/tapered plug welding method.
Background technology
Friction column/tapered plug weldering is that a kind of novel solid phase proposed based on Continuous Drive Friction Welding and arc stud welding welding process is connected
Connection technology was invented in 1992 by Britain's institute of welding and has applied for patent.Its basic principle is：Prefabricated one on base material
Diameter is less than the expendable stopper material of consent and consent keeps concentric by consent to be welded, and high speed rotation, while being filled in
Apply certain axial compressive force on stick and moved to consent bottom, when rotating stopper and consent bottom contacts, starts friction and cut
Cut exothermal process.Under Thermal-mechanical Coupling collective effect, the expendable stopper on frictional interface is in hot plastic state, while to four
Week shifts and fills the radial clearance between stopper and consent inner wall, and ductile bed is due to by base material heat dissipation and cooling deposition shape
At dynamic recrystallization sedimentary.In the whole welding process, the generation rate of ductile bed is higher than the feed rate of stopper, therefore,
Rubbing surface will persistently rise along stopper, and consent is constantly filled by dynamic recrystallization sedimentary, finally combine closely with base material realization.
According to the difference of consent and stopper geometry, two classes can be classified as, that is, the plunger that rubs welds (Friction Hydro
Pillar Processing, FHPP) and friction cone plug welding (Friction Taper Plug Welding, FTPW).It is multiple
Friction column/tapered plug weld seam be mutually superposed side by side just form friction column/tapered plug seam weld (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, smoke dust splash, without arc light and spoke
Penetrate generation；(2) solid-state connects, and thermal deformation and residual stress are small, the melting welding defect such as effectively avoids hydrogen induced cracking, stomata, is mingled with, can
To realize Underwater Welding；(3) plug weld manufacturing cost is low, is not necessarily to solder flux and protective gas；(4) all-position welding can be carried out,
It can be with remote control, it is easy to accomplish automation, welding efficiency is high, and welding point repeatability is strong.Therefore, friction column/tapered plug weldering
Industrial circle extensive concern is obtained, especially there is advantage outstanding in some special application scenario such as ocean engineering fields.
First, friction column/tapered plug weld seam, can be used for repairing that various weld defects since welding process generates, it repaiies
Multiple effect is better than original melting welding reparation, the shrinkage pool that is left due to stirring tool for repairing stirring friction welding seam end and various
Stirring friction welding seam local defect can be used for the outer tank welding point defect of repairing space shuttle, marine propeller and oil
The various local corrosion defects of gas storage tank；Secondly, the as friction stub weldering when stopper becomes bolt, can 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 object
Welding and local route repair, the emergent local route repair of the boiling of nuclear industry field water reactor and high steam pipeline surface, moreover it is possible to use
It is modified in the friction surfacing of part surfaces externally and internally.
Conventional friction column/tapered plug weldering there are problems that in application process：(1) high to welding equipment requirement, it needs to carry
For high welding rotating speed and larger axial compressive force, cause the adjustable range of welding procedure relatively narrow；(2) welding starts due to suffered
Load is excessive, causes welding torque to rise rapidly, it is stuck because of overload to be easy to cause welding machine；(3) plug weld bottom roundings transition
Place's superplastic material flow is not enough, since frictional heat source deficiency easy tos produce non-soldering defect；(4) since welding process continues
Time is shorter, and welding cooling velocity is very fast, causes to be possible to generate coarse institutional framework inside entire plug weld and makes in hardness
It rises plasticity to decline, have an adverse effect to plug weld mechanical property and plastic deformation.
Invention content
For the prior art, the present invention provides a kind of electric current auxiliary friction column/tapered plug welding method, peculiar using the present invention
Tooling formed between accessory power supply, upper conducting block, stopper, workpiece and lower conducting block conductive after connecting an accessory power supply
Circuit；Apply high current effect between stopper and workpiece so that stopper frictional interface is in frictional heat source and contact resistance heat source
Plug weld is formed under collective effect, to realize electric current auxiliary friction column/tapered plug welding process.
In order to solve the above-mentioned technical problem, a kind of tooling for electric current auxiliary friction plug welding proposed by the present invention, including
Stopper fixture, work piece holder and accessory power supply, the stopper fixture includes metal sleeve, the metal sleeve it is opening down,
The top of the metal sleeve is equipped with the cylindrical rod coordinated with welding machine collar bush, welding machine collet, along the inner wall of the metal sleeve
Equipped with ebonite bush, stopper collet is equipped in the ebonite bush, the stopper collet is by metal chuck and collet
It constitutes；Upper conducting block is equipped between the top and the top of the ebonite bush of the metal chuck, along the metal sleeve
It is equipped with first through hole with the axial center of ebonite bush；The upper end of the through-hole and the centre bore of the welding machine collar bush connect
It is logical；The work piece holder includes the workpiece box and stationary fixture of insulating materials, and the substrate of the workpiece box is equipped with lower conduction
Block；The side wall of the workpiece box is equipped with the second through-hole；It is led to respectively from the positive electrode of the accessory power supply and negative electrode
First cable and the second cable, first cable successively pass through welding machine collar bush endoporus, welding machine collet endoporus and
The first through hole is connected to conducting block；Second cable is connected to lower conducting block by the second through-hole；Stopper fixture
After stopper and work piece holder clamping workpiece is clamped, when connecting accessory power supply, from first cable, successively through upper conducting block,
Stopper, workpiece, lower conducting block to second cable form primary Ioops.
Further, the area of the upper conducting block and lower conducting block is all higher than the horizontal projected area of consent on workpiece.
The accessory power supply selects AC arc welding power source, electricity source for dc arc welding, inversion according to the technological requirement of friction plug weld
One kind in formula Arc Welding Power and pulsed arc-welding power source.
Realize that electric current auxiliary friction column/tapered plug is welded using the above-mentioned tooling for electric current auxiliary friction plug welding of the present invention
Method includes the following steps：
Step 1: the technological requirement according to friction plug weld, use of the same race or dissimilar material processing bottom is to justify with workpiece
The either pyramidal stopper of column cleans stopper and consent in the prefabricated consent with stopper cooperation in the region to be welded of workpiece
Totally；
Step 2: utilizing the above-mentioned tooling for electric current auxiliary friction plug welding clamping stopper and workpiece on welding machine, wherein
The area of the upper conducting block is more than the contact area between upper conducting block and the stopper；The area of lower conducting block is more than stopper
Contact area between consent on workpiece；The lower conducting block is between workpiece and the upper surface of workpiece box；The workpiece
On the axis of consent overlapped with the axis of the stopper；
Step 3: one end of the first cable passes through the endoporus and described first of the endoporus of welding machine collar bush, welding machine collet
It is connect with upper conducting block after through-hole；One end of second cable is after the second through-hole of workpiece box side wall and positioned at workpiece bottom
Lower conducting block connection；The other end of first cable and the second cable is connected to accessory power supply, the 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 kind therefrom selecting galvanic properties and suitably a kind of power supply of size of current that is, according to friction plug weld technological requirement；
Step 4: setting technological parameter on welding machine and accessory power supply, starts welding machine and accessory power supply, wait for stopper turn up
To after preset value, apply axial force on stopper, meanwhile, stopper is moved to consent bottom direction in an axial direction；When stopper and consent
When bottom contacts, galvanic circle is formed between accessory power supply, upper conducting block, stopper, workpiece, lower conducting block；In stopper and work
The end material of the collective effect of resistance heat and frictional heat at frictional interface between the consent of part, stopper is in rapidly thermoplasticity
State, meanwhile, under Thermal-mechanical Coupling collective effect, plastic material shifts and fills the gap between stopper and consent around,
With the progress of welding process, which is filled, and after completing in the upset stage, closes accessory power supply and welding machine, so far complete
At electric current auxiliary friction column/tapered plug welding.
Compared with prior art, the beneficial effects of the invention are as follows：
(1) present invention is a kind of simple and effective electric current householder method, can ensure to generate reliable and stable resistance heat.
Under the booster action of resistance heat, the technological requirement of friction column/tapered plug weldering is reduced, the power demand of welding equipment is reduced.
(2) present invention both can carry out auxiliary heating to friction column/tapered plug weldering, can also carry out weld preheating and postwelding heat
Processing.Therefore, the generation of weld defect can be reduced, especially because shortage of heat causes material plastic flow state insufficient
The defects of caused is not filled by, non-soldering.To further increase welding quality, improve the mechanical property of welding point.
(3) optional equipment is simple, and cost is relatively low, is conducive to electric current auxiliary friction column/tapered plug welding method and promotes and apply,
With vast potential for future development.
Description of the drawings
Fig. 1 is the schematic diagram that the welding of electric current auxiliary friction plunger is realized using cylindric stopper；
Fig. 2 is the schematic diagram that the welding of electric current auxiliary friction plunger is realized using pyramidal stopper.
In figure：
1- welding machine collar bushes, 2-welding machine collets, the upper conducting blocks of 31-, conducting block under 32-, 4- metal sleeves, 41- cylinders
Stick, 5- ebonite bush, 6- metal chucks, 7- collets, 8- stoppers, 9- stationary fixtures, 10- workpiece, 11- workpiece boxes, 12-
Workbench, the first cables of 131-, the second cables of 132-, 14- accessory power supplys, 15- consents, arrow I indicate axial compressive force side
To arrow II indicates stopper direction of rotation.
Specific implementation mode
Technical solution of the present invention is described in further detail in the following with reference to the drawings and specific embodiments, it is described specific
Embodiment is only explained the present invention, is not intended to limit the invention.
The mentality of designing of the present invention is to be passed through electric current in the welding section of workpiece and in the friction of stopper and workpiece jack contact
Interface generates resistance heat, the composite heat power supply of the resistance heat and friction thermosetting friction column/tapered plug weldering process, to realize electric current
Auxiliary friction column/tapered plug welding process.Realize that the measure for generating resistance heat is mainly：One electrode of accessory power supply is passed through into electricity
Cable is connected on the upper conducting block contacted with stopper, another electrode of accessory power supply is connected on by cable and welding workpiece
On connected lower conducting block, and make to insulate between workpiece and workbench between stopper and welding machine collar bush and welding machine collet,
Galvanic circle is formed between accessory power supply, stopper and workpiece, you can is generated at the frictional contact surface of stopper and the consent of workpiece
Resistance heat.In 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
At the metal chuck center of side between ebonite bush and the back of work of consent bottom (i.e. the upper surface of workpiece box), and
It is the projected area more than plug weld by the area design of conducting block so that electric current flows through plug weld region to greatest extent, without
It is short circuiting transfer to workpiece surface region.
As depicted in figs. 1 and 2, a kind of tooling for electric current auxiliary friction plug welding proposed in the present invention, including stopper
Fixture, work piece holder and accessory power supply 14.
The stopper fixture includes metal sleeve 4, opening down, the top of the metal sleeve 4 of the metal sleeve 4
Equipped with the cylindrical rod 41 with welding machine collar bush 1 and the cooperation of welding machine collet 2, the inner wall along the metal sleeve 4 is served as a contrast equipped with hard rubber
Set 5, the ebonite bush 5 is interior to be equipped with stopper collet, and the stopper collet is made of metal chuck 6 and collet 7；It is described
Stopper fixture is using three layers of composition, respectively by metal sleeve 4-ebonite bush, 5-high intensity of high intensity from outer layer to inner layer
Metal chuck 6, it is mutually nested by mechanical force.And at the top of the metal chuck 6 and the ebonite bush 5
Top between be equipped with upper conducting block 31, it is logical to be equipped with first along the axial center of the metal sleeve 4 and ebonite bush 5
Hole；The upper end of the through-hole is connected to the centre bore of the welding machine collar bush 1 can form independent plug with the cooperation of welding machine collet 2
Stick clamping device, can proof strength and with welding machine collar bush, welding machine collet insulate, be fixed on welding machine collar bush,
It can realize electric current auxiliary welding.
The work piece holder includes the workpiece box 11 and stationary fixture 9 of insulating materials, the substrate of the workpiece box 11
Equipped with lower conducting block 32, the area of the upper conducting block 31 and lower conducting block 32 is all higher than the horizontal plane of consent on workpiece 10
Product so that electric current flows through plug weld region to greatest extent, rather than short circuiting transfer is to workpiece surface region, the workpiece box 11
Side wall is equipped with the second through-hole.Used insulation workpiece box 11 (slot) and insulating fixing clamp tool 9 will have certain mechanical force
Performance and thermal stability are learned, and is ensured completely insulated.Therefore, sandwich may be used in insulation workpiece box 11, i.e., by high-strength
The metal of metal-hard rubber-high intensity of degree is mutually nested and constitutes.Stationary fixture 9 can be by hard rubber and high intensity
Metal is constituted, and workpiece 10 can be fixed by being bolted, and makes workpiece 10 and workbench 12 in entire welding process
Insulation.
In the present invention, used upper and lower conducting block 31 and 32 will have good electric conductivity, can select round copper material
Material, and match with the perspective plane of plug weld, to keep good with workpiece and with for being clamped between the metal chuck of stopper
Contact.Meanwhile non-solder area is escaped into order to reduce electric current, the area of upper and lower conducting block 31 and 32 only is slightly greater than consent
Projected area.
The accessory power supply selects AC arc welding power source, electricity source for dc arc welding, inversion according to the technological requirement of friction plug weld
One kind in formula Arc Welding Power and pulsed arc-welding power source, so as to provide larger electric current.Just from the accessory power supply 14
The first cable 131 and the second cable 132 are led on electrode and negative electrode respectively, first cable 131 passes through successively
It crosses 1 endoporus of welding machine collar bush, the endoporus of welding machine collet 2 and the first through hole and is connected to conducting block 31；Second cable
Line 132 is connected to lower conducting block 32 by the second through-hole；After stopper 8 and work piece holder clamping workpiece 10 is clamped in stopper fixture, when
Connect accessory power supply 14, from first cable 131, successively through upper conducting block 31, stopper 8, workpiece 10, lower conducting block 32 to
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 with will by cable
The circular hole that matches of diameter, the metal chuck 6 and hard rubber that the first cable 131 passes through circular hole and is arranged in stopper fixture
Upper conducting block 31 between bushing 5 at center connects, the lower conducting block of the second cable 132 and 15 underlying workpiece of consent, 10 back side
32 connections, the problem of cable being caused to wind to avoid high-speed rotation.
Utilize the above-mentioned tooling for electric current auxiliary friction plug welding, it may be convenient to realize electric current auxiliary friction column/tapered plug
Welding method mainly includes the following steps that：
Step 1: the technological requirement according to friction plug weld, use of the same race or dissimilar material processing bottom is to justify with workpiece
The either pyramidal stopper 8 of column, in 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: using the above-mentioned tooling for electric current auxiliary friction plug welding clamping stopper 8 and workpiece 10 on welding machine,
In, the area of the upper conducting block 31 and lower conducting block 32 is all higher than the horizontal projected area of consent on workpiece 10；It is led under described
Electric block 32 is between workpiece 10 and the upper surface of workpiece box 11；The axis of consent 15 on the workpiece 10 and the stopper 8
Axis overlap；
Step 3: one end of the first cable 131 passes through the endoporus of welding machine collar bush 1, the endoporus of welding machine collet 2 and described
It is connect with upper conducting block 31 after first through hole；One end of second cable 132 pass through 11 side wall of workpiece box the second through-hole after with
Lower conducting block 32 positioned at 10 bottom of workpiece connects；The other end of first cable 131 and the second cable 132 is connected to auxiliary
Power supply 14, the accessory power supply select AC arc welding power source, electricity source for dc arc welding, inversion according to the technological requirement of friction plug weld
One kind in formula Arc Welding Power and pulsed arc-welding power source.
Step 4: after the completion of fixation to be mounted, technological parameter is set on welding machine and accessory power supply 14, starts welding machine and auxiliary
Power supply is helped, 8 high speed rotation of stopper is made, after 8 rotating speed of stopper reaches preset value, applies axial force on stopper 8, meanwhile, stopper 8
It is moved in an axial direction to 15 bottom direction of consent；When stopper 8 and 15 bottom of consent contact, accessory power supply 14, upper 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, generates a large amount of resistance heat.Resistance at frictional interface between stopper 8 and the consent 15 of workpiece 10
The end material of the collective effect of heat and frictional heat, stopper 8 is in rapidly hot plastic state, meanwhile, make jointly in Thermal-mechanical Coupling
Under, plastic material shifts and fills the gap between stopper 8 and consent 15 around, due to by base material heat dissipation and cooling deposition
Effect forms dynamic recrystallization sedimentary.With the progress of welding process, which is constantly filled, and is completed when the upset stage
Later, accessory power supply 14 should be closed immediately, then, stops welding machine, so far complete electric current auxiliary friction column/tapered plug welding.It will plug
Stick 8 is unloaded down from stopper fixture, lays down fixture, is removed work piece holder, is machined away stopper material extra on workpiece, you can complete
At whole process.
Compared with conventional friction column/tapered plug Welding, this method has following obvious characteristic：(1) it can reduce to friction
The requirement of heat, to reduce requirement and the equipment manufacturing costs to welding equipment dynamic system；(2) weld seam bottom can be improved to rub
The unfavorable factor that heat source insufficiency easy tos produce defect is wiped, so as to improve plug weld institutional framework and mechanical property；(3) it can widen
The welding parameter of the materials 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 steels to 35mm thickness below
Invention welding method.
First, in the prefabricated diameter 11mm in 10 position to be welded of workpiece, the high cylindric consents of 20mm, then by surface and oil contaminant
It is cleaned up with abrasive grain and clast.It is matched using the cylindric X65 stoppers 8 of a diameter of 10mm.31 He of upper and lower conducting block
32 select discoid copper product, and accessory power supply 14 selects IGBT arc welding rectifiers, with the first cable 131 by upper conducting block
31 connect with accessory power supply 14, are connected lower conducting block 32 with the second cable 132.According to shown in Fig. 1 by stopper fixture
It is in place with work piece holder installation, and clamping and assembly are carried out to stopper 8 and workpiece 10.
After to be mounted and assembly, stopper 8 is set to keep coaxial with consent 15, in friction column plug welding machine and accessory power supply 14
The upper various relevant parameters of 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, makes 8 high speed rotation of stopper, after rotating speed reaches 6500rmp, in stopper 8
Upper application 30KN axial compressive forces (as shown in arrow I downward in Fig. 1) keep it axial to the shifting of consent bottom direction along consent 15
It is dynamic.
When the bottom of stopper 8 and consent 15 contacts, by the connection of the first and second cable 131 and 132, in auxiliary electricity
Source 14, stopper 8, workpiece 10 consent 15 and upper and lower conducting block 31 and 32 between form galvanic circle.Most according to contact resistance
Big principle, the resistance at stopper 8 and frictional interface is maximum, generates a large amount of resistance heat, resistance heat not only to friction column plug welding into
Row auxiliary heating, and carry out weld preheating and post weld heat treatment.By under the collective effect of resistance heat and frictional heat, stopper end
Material is in rapidly hot plastic state.Meanwhile under Thermal-mechanical Coupling collective effect, plastic material shifts and fills stopper around
Gap between consent, due to being formed dynamic recrystallization sedimentary by base material heat dissipation and cooling deposition.With welding
The progress of journey, constantly fills up consent, after completing in the upset stage, closes accessory power supply immediately, then stops friction column
Plug welding machine, to realize that electric current auxiliary friction plunger welds.
Stopper 8 is unloaded down from stopper fixture, and lays down stopper and work piece holder, attachment is removed, machines away workpiece 10
Upper extra 8 material of stopper, you can complete whole process.After testing, it is welded using electric current auxiliary friction plunger of the present invention
Method takes smaller welding rotating speed and axial compressive force, so that it may to obtain molding well and the welding point of good mechanical performance.
The application example of above description is not limited to X65 pipe line steel materials, can also be applied to other kinds material and carry out
Electric current auxiliary friction plunger welds.
Electric current auxiliary friction tapered plug welding method for pyramidal stopper rod nozzle shown in Fig. 2 and cylinder shown in FIG. 1
The principle of the electric current auxiliary friction plunger welding method of shape stopper rod nozzle is just the same.Therefore, it is no longer described in detail.
Although above in conjunction with attached drawing, invention has been described, and the invention is not limited in above-mentioned specific implementations
Mode, the above mentioned embodiment is only schematical, rather than restrictive, and those skilled in the art are at this
Under the enlightenment of invention, without deviating from the spirit of the invention, many variations can also be made, these belong to the present invention's
Within protection.
Claims (2)
1. a kind of tooling for electric current auxiliary friction plug welding, including stopper fixture, work piece holder and accessory power supply (14), special
Sign is：
The stopper fixture includes metal sleeve (4), opening down, the top of the metal sleeve (4) of the metal sleeve (4)
Portion is equipped with the cylindrical rod (41) coordinated with welding machine collar bush (1) and welding machine collet (2), and the inner wall along the metal sleeve (4) is set
There is ebonite bush (5), is equipped with stopper collet in the ebonite bush (5), the stopper collet is by metal chuck (6) and bullet
Spring collet (7) is constituted；Upper conducting block is equipped between the top and the top of the ebonite bush (5) of the metal chuck (6)
(31), it is equipped with first through hole along the axial center of the metal sleeve (4) and ebonite bush (5)；The first through hole
Upper end is connected to the centre bore of the welding machine collar bush (1)；
The work piece holder includes the workpiece box (11) and stationary fixture (9) of insulating materials, on the bottom plate of the workpiece box (11)
Face is equipped with lower conducting block (32)；The side wall of the workpiece box (11) is equipped with the second through-hole；
Lead to the first cable (131) and the second cable respectively from the positive electrode and negative electrode of the accessory power supply (14)
(132), first cable (131) passes through welding machine collar bush (1) endoporus, the endoporus of welding machine collet (2) and described the successively
One through-hole is connected to conducting block (31)；Second cable (132) is connected to lower conducting block (32) by the second through-hole；Plug
After stopper (8) and work piece holder clamping workpiece (10) is clamped in rod clamp, when connecting accessory power supply (14), from first cable
(131), successively through upper conducting block (31), stopper (8), workpiece (10), lower conducting block (32) to the second cable (132) shape
At primary Ioops；The area of the upper conducting block (31) and lower conducting block (32) is all higher than the horizontal of consent (15) on workpiece (10) and throws
Shadow area；
The accessory power supply is in AC arc welding power source, electricity source for dc arc welding, inverter arc welding power source and pulsed arc-welding power source
It is a kind of.
2. a kind of electric current auxiliary friction column/tapered plug welding method, which is characterized in that include the following steps：
Step 1: the technological requirement according to friction plug weld, use and workpiece is of the same race or dissimilar material processing bottom is cylindric
Either pyramidal stopper (8), in the prefabricated consent (15) with stopper (8) cooperation in the region to be welded of workpiece (10), by stopper
(8) it is cleaned up with consent (15)；
Step 2: utilize as described in claim 1 for electric current auxiliary friction plug welding tooling on welding machine clamping stopper (8) and
Workpiece (10), wherein the area of the upper conducting block (31) and lower conducting block (32) is all higher than consent (15) on workpiece (10)
Horizontal projected area；The lower conducting block (32) is located between workpiece (10) and the upper surface of workpiece box (11)；The workpiece
(10) axis of the consent (15) on is overlapped with the axis of the stopper (8)；
Step 3: one end of the first cable (131) passes through the endoporus of welding machine collar bush (1), the endoporus of welding machine collet (2) and institute
It is connect with upper conducting block (31) after stating first through hole；One end of second cable (132) passes through the second of workpiece box (11) side wall
It is connect with the lower conducting block (32) 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), the accessory power supply according to the technological requirement of friction plug weld, select AC arc welding power source,
One kind in electricity source for dc arc welding, inverter arc welding power source and pulsed arc-welding power source；
Step 4: setting technological parameter on welding machine and accessory power supply (14), start welding machine and accessory power supply, waits for that stopper (8) turns
After speed reaches preset value, apply axial force on stopper (8), meanwhile, stopper (8) is moved to consent (15) bottom direction in an axial direction
It is dynamic；When stopper (8) and consent (15) bottom contact, in accessory power supply (14), upper conducting block (31), stopper (8), workpiece
(10), galvanic circle is formed between lower conducting block (32)；Frictional interface between stopper (8) and the consent (15) of workpiece (10)
Under the collective effect for locating resistance heat and frictional heat, the end material of stopper (8) is in rapidly hot plastic state, meanwhile, in heating power
It couples under collective effect, plastic material shifts and fills the gap between stopper (8) and consent (15) around, with welding
The progress of journey, the gap are filled, and after completing in the upset stage, are closed accessory power supply (14) and welding machine, are so far completed electric current
Auxiliary friction column/tapered plug welding.
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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 |
| US11370058B2 (en) * | 2019-08-13 | 2022-06-28 | The Boeing Company | Loading feedstock 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 |
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