CN104923890B - Ultrasonic auxiliary argon arc welding method and auxiliary device with adjustable sound source incidence angle and position - Google Patents
Ultrasonic auxiliary argon arc welding method and auxiliary device with adjustable sound source incidence angle and position Download PDFInfo
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- CN104923890B CN104923890B CN201510428009.7A CN201510428009A CN104923890B CN 104923890 B CN104923890 B CN 104923890B CN 201510428009 A CN201510428009 A CN 201510428009A CN 104923890 B CN104923890 B CN 104923890B
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- 238000003466 welding Methods 0.000 title claims abstract description 240
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 title claims abstract description 68
- 229910052786 argon Inorganic materials 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 33
- 229910052751 metal Inorganic materials 0.000 claims abstract description 29
- 239000002184 metal Substances 0.000 claims abstract description 29
- 230000008859 change Effects 0.000 claims abstract description 16
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims abstract description 15
- 238000003754 machining Methods 0.000 claims abstract description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 57
- 229910052802 copper Inorganic materials 0.000 claims description 57
- 239000010949 copper Substances 0.000 claims description 57
- 230000033001 locomotion Effects 0.000 claims description 43
- 239000007789 gas Substances 0.000 claims description 21
- 238000002604 ultrasonography Methods 0.000 claims description 20
- 230000008878 coupling Effects 0.000 claims description 12
- 238000010168 coupling process Methods 0.000 claims description 12
- 238000005859 coupling reaction Methods 0.000 claims description 12
- 238000002525 ultrasonication Methods 0.000 claims description 11
- 230000002463 transducing effect Effects 0.000 claims description 10
- 229910000838 Al alloy Inorganic materials 0.000 claims description 9
- 229910000881 Cu alloy Inorganic materials 0.000 claims description 9
- 230000005611 electricity Effects 0.000 claims description 3
- 238000009414 blockwork Methods 0.000 claims 1
- 230000001681 protective effect Effects 0.000 claims 1
- 238000005476 soldering Methods 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 1
- 238000002425 crystallisation Methods 0.000 abstract description 5
- 230000008025 crystallization Effects 0.000 abstract description 5
- 230000004927 fusion Effects 0.000 abstract description 2
- 210000001503 joint Anatomy 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 19
- 239000013078 crystal Substances 0.000 description 13
- 239000007788 liquid Substances 0.000 description 10
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 10
- 229910052721 tungsten Inorganic materials 0.000 description 10
- 239000010937 tungsten Substances 0.000 description 10
- 230000008018 melting Effects 0.000 description 7
- 238000002844 melting Methods 0.000 description 7
- 230000003321 amplification Effects 0.000 description 6
- 238000003199 nucleic acid amplification method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 230000005496 eutectics Effects 0.000 description 4
- 210000001787 dendrite Anatomy 0.000 description 3
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- 239000000203 mixture Substances 0.000 description 3
- 230000008520 organization Effects 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000012071 phase Substances 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
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- 239000007791 liquid phase Substances 0.000 description 2
- 238000005272 metallurgy Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 229910001008 7075 aluminium alloy Inorganic materials 0.000 description 1
- 206010020843 Hyperthermia Diseases 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 206010037660 Pyrexia Diseases 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- NGONBPOYDYSZDR-UHFFFAOYSA-N [Ar].[W] Chemical compound [Ar].[W] NGONBPOYDYSZDR-UHFFFAOYSA-N 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
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- 238000007872 degassing Methods 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
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- 230000036031 hyperthermia Effects 0.000 description 1
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- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000004021 metal welding Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
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- 238000010200 validation analysis Methods 0.000 description 1
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
- 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
-
- 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
- B23K9/32—Accessories
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/08—Non-ferrous metals or alloys
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
The invention discloses an ultrasonic auxiliary argon arc welding method and auxiliary device with adjustable sound source incident angle and position, wherein the device comprises an ultrasonic welding clamp and an ultrasonic follow-up system, and the ultrasonic follow-up system is contacted with the ultrasonic welding clamp through an ultrasonic amplitude transformer in ultrasonic equipment; the method comprises the following steps: preparing before welding: machining a butt joint groove of a workpiece to be welded into a V shape, clamping the workpiece to be welded by using an ultrasonic welding clamp, fixing the welding clamp on a welding platform, clamping an ultrasonic amplitude transformer of ultrasonic equipment on an ultrasonic follow-up system, and enabling the tail end of the ultrasonic amplitude transformer to be in contact with an inclined plane of an angle-adjustable insert in the welding clamp; welding: determining the technological parameters of argon arc welding, starting the power supply of the argon arc welding machine, striking the arc by the welding gun, and starting the ultrasonic power supply of the ultrasonic equipment to output sound waves after the arc is stabilized. The invention can effectively solve the problem of serious thermal cracks in non-ferrous metal fusion welding, and can effectively change the crystallization direction and spheroidize refined grains.
Description
Technical field
The present invention relates to Welding Metallurgy technical field is and in particular to the adjustable ultrasonic wave added of a kind of sound source incident angle and position
Argon arc welding method.
Background technology
Although copper alloy and aluminium alloy show entirely different, in welding particularly in physical property, mechanical performance
HOT CRACK FOR WELDING P all occurs during argon tungsten-arc welding (gtaw), govern the application of copper alloy and aluminium alloy.Remove welding
Outside the external factor of stress and deformation, fire check appearance all with process of setting low melting eutecticses appearance temperature range, composition,
Ratio and distribution are relevant.For copper and copper alloy, in fusion process due to oxygen element invade molten bath, can be formed during solidification by
cu2O and cu composition low melting point eutectic tissue distribution between the α-cu crystal grain of solidification, improve copper and copper alloy welding
Hot cracking tendency.For aluminum and aluminium alloy, due to the presence of alloying element cu, si and mg during melting welding, a series of with al composition
Low-melting-point eutectic be gathered in dendrite interdendritic formed liquid film, be torn under contraction stretching stress, shape
Become fire check.
Power ultrasonic has cavitation and acoustic streaming effect.When cavitation effect is that ultrasound wave is propagated in a liquid, fluid molecule is subject to
Effect to periodicity alternation sound field.In the sparse phase of sound wave, liquid is subject to tension, if sound pressure level is sufficiently large, liquid is drawn
Split and produce cavitation bubble or hole；In the sound wave malleation phase of subsequent arriving, these cavitation bubbles or hole are closed with high speed
Close or collapse, thus producing localized hyperthermia and the high pressure of moment in liquid.Acoustic streaming effect is then ultrasound wave having in a liquid
Limit amplitude decay makes to form certain acoustic pressure gradient in liquid, thus forming the injection of a fluid.
Application in metal material connection and metallurgy for the power ultrasonic mainly has ultrasonic metal welding, ultrasonic assistant brazing
Technique, Fine by Ultrasonic technique and ultrasonic degasification and impurity removal process.Localized liquid can be made to produce wink using ultrasonic cavitation effect
Between high-pressure shocking wave, the broken metal grain growing, play the effect of crystal grain thinning.Can be made using ultrasonic acoustic streaming effect
Reactive fluid produces high speed convection, similar to mechanical agitation, accelerates mobility between solid grains for the liquid.
Chinese patent 201410778002.3 discloses a kind of ultrasound wave non-melting electrode argon arc welding technique and device, this technique
It is in real time ultrasonic activation to be carried out to the mother metal near molten bath and weld seam during non-melting electrode argon arc welding, make motlten metal
Uniformly, commissure metal grain refines for dense structure, accelerates molten bath gas evolution, improves welding quality.But its shortcoming is this
In technique, the incident angle of ultrasound wave sound source and position cannot be adjusted it is impossible to realize ultrasonic amplitude transformer with welding gun movement locus together
When with synchronicity it is ensured that welding stability.
Content of the invention
For HOT CRACK FOR WELDING P serious problem when non-ferrous metal such as copper alloy, aluminium alloy arc-welding, in traditional arc welding method
On the basis of introduce ul-trasonic irradiation, a kind of sound source incident angle and position adjustable ultrasonic wave added argon arc welding method and its auxiliary are proposed
Help device.
The present invention employs the following technical solutions:
A kind of sound source incident angle and position adjustable ultrasonic wave added argon arc welding auxiliary device, including ultrasonic welding fixture and
Ultrasonic servo system, the ultrasonic amplitude transformer that described ultrasonic servo system passes through in ultrasonic equipment is contacted with ultrasonic welding fixture.
Wherein:
Described ultrasonic welding fixture, including a bevelled adjustable angle insert of tool, apart from adjustable cushion block, height adjustable pressure
Block and base, the vertical plane of described adjustable angle insert is connected with the first side apart from adjustable cushion block, described apart from adjustable pad
The upper part of the opposite face of the first side of block is connected with height adjustable briquetting, and height adjustable briquetting can cushion block be made up and down relatively
Mobile, the lower part connect base of the opposite face of the described first side apart from adjustable cushion block, the basal surface of height adjustable briquetting
It is provided with the space placing workpiece to be welded with the upper surface of base.
Described connection is flexible connection.
Further, the inclined-plane of adjustable angle insert and the angular range of its basal surface are 0 ＜ α≤90 °, and sound wave can be with horizontal stroke
The form of ripple compressional wave complex wave or shear wave is incident, and when angle is in 90 ° of 0 ＜ α ＜, sound wave is in the form of shear wave compressional wave complex wave
Incidence, when α is 90 °, sound wave is incident in the form of shear wave, and the incident angle adjusting sound wave is thus investigate various sound wave incident angles
The impact situation to Metal Mechanic Property after welding for the degree, therefrom incident angle needed for optimum selecting.
Further, the vertical plane of described adjustable angle insert is provided with dove-tail form groove, apart from the first side of adjustable cushion block
It is provided with the convex dovetails being connected with dove-tail form fit depressions.Described convex dovetails are connected realization with dove-tail form groove fit
The fixation of the insert of adjustable angle.
Further, the opposite face of the described first side apart from adjustable cushion block is provided with dove-tail form groove, height adjustable briquetting
Side be provided with the convex dovetails being connected with dove-tail form fit depressions, and described convex dovetails can be apart from adjustable pad
Slide up and down in the dove-tail form groove of the opposite face of the first side of block.
Further, the described thickness apart from adjustable cushion block is 10～50mm.The thickness of adjustable range is adjustable cushion block, can make
Ultrasonic amplitude transformer is changed in the range of 110-160mm with the distance of weld seam, so that sound wave can be entered in nearly weld metal zone and remote weld metal zone
Penetrate.
This ultrasonic welding fixture forms by adjustable angle insert, apart from adjustable cushion block and height adjustable briquetting, realizes ultrasonic
In incidence angles degree, different wlding thickness and welding, weld metal zone is located at the remote peak of ultrasound wave, the adjustment at nearly peak.
The inclined-plane of described adjustable angle insert is contacted with the horn of ultrasonic assistant system, has difference tiltedly by changing
The insert of face angle degree, realizes the change of ultrasound wave incident angle.
When need to adjust between ultrasonic applying position and position while welding apart from when, from the adjustable cushion block of distance of suitable thickness,
Realize the adjustable of distance between ultrasonic applying position and position while welding.
Described height adjustable briquetting passes through in distance mainly for the welding workpiece of different thicknesss of slab, described height adjustable briquetting
Slide up and down in the dove-tail form groove of adjustable cushion block, compress welding workpiece, to adapt to different wlding thickness.Height adjustable briquetting pressure
Tight welding workpiece, in order to compress welding workpiece further, can be rigidly fixed in side using u clamp.
Described ultrasonic servo system, including horizontal movement system, vertically movable system and base, described vertical motion system
It is arranged on base；Described horizontal movement system and vertically movable system all include motor, leading screw and guide pillar；Described stepping
Motor is connected with leading screw by shaft coupling, and the leading screw of vertically movable system is provided with the second feed screw nut that can move up and down, the
Two feed screw nuts connect horizontal movement system, and the leading screw of horizontal movement system is provided with the first feed screw nut of energy horizontal movement；
First feed screw nut is connected with connector, and described connector connects the sleeve block that can fix ultrasonic amplitude transformer.
Further, described motor is connected with one end of leading screw by shaft coupling, the other end of leading screw and guide pillar base
Connect, guide pillar is fixed between shaft coupling and guide pillar base.
Further, the axis perpendicular of the axis of described vertical motion system and horizontal movement system.Described second leading screw
Nut connects the outside of the guide pillar of horizontal movement system.
Further, described connector be shaped as u-shaped, u-shaped connector branch sleeve block, described sleeve block is provided with fixing super
The aperture of sound horn, described sleeve block can rotate in u-shaped connector.Another embodiment is: sleeve block is radially provided with
Jackscrew, clamps ultrasonic amplitude transformer.
Further, the both sides of u-shaped connector are provided with screw, and sleeve block is connected on u-shaped connector by screw.
Further, in order to preferably coordinate u-shaped connector, described sleeve block is chamfered edge sleeve block, fixing super in sleeve block
The bar portion of sound horn, realizes stepping up of ultrasonic amplitude transformer under given angle by the screw of u-shaped connector both sides.
Further, described leading screw is ball-screw.
Further, described motor is also connected with control system, and control system controls the method for operation of motor.
When soldered, by the ultrasonic amplitude transformer clamping of ultrasonic equipment in the sleeve block of ultrasonic servo system, ultrasonic change
The inclined-plane of adjustable angle insert in the end of width bar and ultrasonic welding fixture or the upper surface full contact apart from adjustable cushion block,
Then start ultrasonic equipment and argon arc welding machine is welded.
Using the sound source incident angle and position adjustable ultrasonic wave added argon arc welding method of described auxiliary device, including following
Method:
(1) prepare before welding: machining workpiece to be welded butting grooves are in v shape, clamped using ultrasonic welding fixture to be welded
Connect workpiece, weld jig is fixed on jig, by the ultrasonic amplitude transformer clamping of ultrasonic equipment in ultrasonic servo system
On, make the inclined-plane of the adjustable angle insert in the end of ultrasonic amplitude transformer and weld jig or connect apart from the upper surface of adjustable cushion block
Touch.
(2) weld: determine the technological parameter of argon arc welding, start argon arc welding machine power supply, welding gun striking, after arc stability,
Start the ultrasonic-frequency power supply output sound wave of ultrasonic equipment；
Welding gun plays weldering with setting speed, and after ultrasound wave applies setting time, the leading screw of horizontal movement system controls ultrasound wave
Horn is allowed to adjustable angle insert or separates apart from adjustable cushion block, after welding direction in the same direction motion certain distance, controls
Ultrasonic amplitude transformer falls with adjustable angle insert or contacts apart from adjustable cushion block and continues to ultrasonic, by that analogy, realizes ultrasonic
Horn and welding gun synchronicity and synchronism.
(3) it is welded to workpiece afterbody to be welded and receives arc, close welding machine electric power, lift ultrasonic amplitude transformer, stop ultrasonication and close
Close ultrasonic-frequency power supply.
In step (1), described workpiece to be welded is non-ferrous metal, such as copper, copper alloy or aluminium alloy, and its thickness is 6-
15mm.
According to the welding effect of many experiments, the method for the present invention be more suitable for thickness be 6-15mm non-ferrous metal copper,
Copper alloy or the welding of aluminium alloy.
In step (1), the non-groove side of described workpiece to be welded and the tight rigid contact of base, in order that ultra-sonic welded
Fixture is more firm, then using plain clamp (u-shaped fixture), ultrasonic welding fixture is fixed on jig.
In step (1), by the adjustable angle insert contact from different angles, the applying angle of ultrasonic amplitude transformer is made to exist
0～90 ° adjustable, and horn end directly acts on adjustable angle insert inclined-plane or on the upper surface of adjustable cushion block, makes sound
Wavelength-division is not incident with compressional wave, shear wave and compressional wave shear wave complex wave form.Apply angle refer to the inclined-plane of adjustable angle insert and its
The angle of basal surface, when using ultrasonic amplitude transformer, its end surface is completely attached to the inclined-plane of adjustable insert, i.e. ultrasonic amplitude of fluctuation
Bar is perpendicular with inclined-plane.
When angle is in 90 ° of 0 ＜ α ＜, sound wave is incident in the form of shear wave compressional wave complex wave, when α is 90 °, sound wave with
The form of shear wave is incident, when α is 0 °, that is, removes adjustable angle insert, incident acoustic wave acts on the upper table apart from adjustable cushion block
On face.
In step (1), by the adjustable cushion block of distance from different thickness, ultrasonic amplitude transformer and the distance of weld seam is made to exist
Change in the range of 110-160mm, make sound wave incident in nearly weld metal zone and remote weld metal zone respectively.
In step (2), determine the technological parameter of argon arc welding: the material according to workpiece to be welded and thickness of slab determine starting the arc electricity
Stream, welding current, receipts arc current, speed of welding and shield gas flow rate.Described striking current is 150～190a, welding current
For 170～230a, receive arc current 150～190a, speed of welding 2～4mm/s, shield gas flow rate is 5～10l/min.Through
Lot of experiment validation has obtained above-mentioned technological parameter, makes welding effect best.
Preferably, taking 6mm thickness t3 copper plate as a example, striking current 170-190a, welding current 210-230a, receive arc current
170-190a, speed of welding 2mm/s, shielding gas flow 10l/min；Taking 6mm thickness 7075 aluminium alloy plates as a example, striking current 150-
170a, welding current 170-190a, receive arc current 150-170a, speed of welding 3.5mm/s, shielding gas flow 8l/min.
In step (2), after starting the ultrasonic-frequency power supply output sound wave of ultrasonic equipment, put through transducing and ultrasonic variable amplitude bar
After greatly, incident ultrasound wave operating frequency is 15-25khz, and amplitude is 20-50 μm.Through many experiments and analysis, obtain this work
It is best that frequency and amplitude can make final welding effect reach, and closest to spherical shape and size is minimum for crystal grain, comprehensive mechanical property
Best.
In step (2), ultrasonic amplitude transformer has following movement locus: declines (contact angle is adjustable insert or apart from adjustable
Cushion block applies ultrasonic) lift (separation) and move decline (contact angle is adjustable insert or apart from adjustable pad along predetermined paths
Block applies ultrasonic).Realize sound wave and welding gun motion rail simultaneously with synchronicity it is ensured that welding stability.
The invention has the beneficial effects as follows: the present invention changes the incidence of ultrasonic amplitude transformer by proprietary ultrasonic welding fixture
Angle and apply position, adjust the ratio of incident longitudinal wave and shear wave, molten bath zone vibration parameters for example amplitude, displacement, the sound intensity and
Acoustic pressure, on the one hand changes the direction of growth of crystal grain, allows the eutectic liquid phase of last crystal region be discharged to weld pool surface, not in dendrite
Between formed formation of crack, increase the service life；On the other hand, change the form of crystal grain, globular crystal is changed into from thick dendrite, improve
Weld properties, ultimately form the weld seam of the fine and closely woven no fire check of even tissue.
Additionally, the present invention is during argon arc welding, by the leading screw of step motor control in horizontal movement system Lai real
Existing ultrasonic amplitude transformer reaches following movement locus: it is default that (separation) edge is lifted in decline (contact insert or cushion block applying are ultrasonic)
Line-of-road movement declines (contact insert or cushion block applying are ultrasonic).Realize ultrasonic amplitude transformer and welding gun movement locus simultaneously with synchronization
Property is it is ensured that welding stability.
Ultrasonic amplitude transformer is controlled with the synchronicity synchronism of welding gun movement locus: first according to metal test plate (panel) size to be welded
Determine that corresponding speed of welding is welding gun translational speed；According to welding gun translational speed, determine horn lift after move horizontally
Ultrasonic application time after speed and vertical drop, formation horn moves horizontally the ultrasonic applying vertically lift of vertical whereabouts
Rise, realize starting and terminating simultaneously while welding gun welding applies ultrasonic with horn.Example: welding gun plays weldering with 2mm/s speed.Open
Open ultrasonic-frequency power supply, after sound wave applies the 4s time, roller screw system controls horn to lift the edge being allowed to ultrasonic welding fixture
Block or cushion block separate, and with the speed of 6mm/s along after welding direction in the same direction horizontal movement 2s, control horn to fall and insert or pad
Block contact continues to ultrasonic, application time 4s, by that analogy.Realize horn and welding gun synchronicity and synchronism.
The present invention can effectively solve the problem that non-ferrous metal such as copper alloy, the problem of aluminium alloy melting welding intermittent fever severe crack, and
Crystallization direction, nodularization crystal grain thinning can effectively be changed, improve weld metal mechanical property.Present invention process strong adaptability, stable
Property good, practicality is wide, also has good improvement to various alloys welding fire check easily.The method has welding
Process stabilization, shaping efficiency is high, advantage simple to operate.
Brief description
Fig. 1 is the structural representation of ultrasonic welding fixture in the present invention；
Fig. 2 is the structural representation of ultrasonic servo system in the present invention；
Fig. 3 is not adopt the grain form of Gas Tungsten Arc Welding t3 copper coin and fire check under the conditions of ultrasonic wave added；
Fig. 4 adopts the grain form of Gas Tungsten Arc Welding t3 copper coin under the conditions of ultrasonic wave added for the present invention；
Fig. 5 a, Fig. 5 b, Fig. 5 c and Fig. 5 d are using weld seam microstructure when angle adjustable in the present invention and thickness fixture.
Fig. 6 a, Fig. 6 b and Fig. 6 c are using weld properties when angle adjustable in the present invention and thickness fixture.
Wherein, 1-1, adjustable angle insert, 1-2, apart from adjustable cushion block, 1-3, height adjustable briquetting, 1-4, workpiece, 1-5,
Base, 1, ultrasonic servo system base, the 2, first motor, the 3, first ball-screw, the 4, first guide pillar, the 5, first shaft coupling
Device, the 6, first feed screw nut, the 7, first guide pillar base, the 8, second motor, the 9, second ball-screw, the 10, second guide pillar,
11st, second shaft coupling, the 12, second feed screw nut, the 13, second guide pillar base, 14, u-shaped connector, 15, chamfered edge sleeve block, 16,
Ultrasonic amplitude transformer.
Specific embodiment
The present invention is further described with reference to the accompanying drawings and examples.
Embodiment 1
As illustrated in fig. 1 and 2, a kind of sound source incident angle and position adjustable ultrasonic wave added argon arc welding auxiliary device, including
Ultrasonic welding fixture and ultrasonic servo system.
Wherein, described ultrasonic welding fixture include a tool bevelled adjustable angle insert 1-1, apart from adjustable cushion block 1-2,
Height adjustable briquetting 1-3 and base 1-5, described fixture is used for ultrasonic wave added tungsten argon arc melting welding and sound source angle and position can
The welding adjusted.
The vertical plane of described adjustable angle insert 1-1 is flexibly connected with the first side apart from adjustable cushion block 1-2, specifically
Connected mode is: the vertical plane of adjustable angle insert 1-1 is provided with dove-tail form groove, and the first side apart from adjustable cushion block 1-2 sets
There are the convex dovetails being connected with dove-tail form fit depressions, thus realizing the fixation of adjustable angle insert 1-1.Adjustable angle is inlayed
The inclined-plane of block 1-1 is contacted with the horn of ultrasonic assistant system, by changing the insert of different angles, realizes ultrasound wave incident
The change of angle.
The upper part of opposite face of the described first side apart from adjustable cushion block 1-2 is with height adjustable briquetting 1-3 activity even
Connect, specific connected mode is: the opposite face of the described first side apart from adjustable cushion block 1-2 is provided with dove-tail form groove, highly
The side of adjustable pressing block 1-3 is provided with the convex dovetails being connected with dove-tail form fit depressions, and convex dovetails are apart from adjustable
Slide up and down in dovetail type groove in cushion block 2.
The lower part of the opposite face of the described first side apart from adjustable cushion block 1-2 is flexibly connected base 1-5, height adjustable
The basal surface of briquetting 1-3 is provided with, with the upper surface of base 1-5, the space placing workpiece 1-4 to be welded.
Described ultrasonic servo system, including horizontal movement system, vertically movable system and ultrasonic servo system base 1.Institute
State vertically movable system to be arranged on ultrasonic servo system base 1.The axis of described horizontal movement system and vertically movable system
Axis be mutually perpendicular to.
Described horizontal movement system includes the first motor 2, the first ball-screw 3, the first guide pillar 4, first shaft coupling
5, the first feed screw nut 6, the first guide pillar base 7, wherein, the first motor 2 passes through first shaft coupling 5 and the first ball-screw
3 one end connects, and the first ball-screw 3 is provided with the first feed screw nut 6, and the first feed screw nut 6 can be with the first ball-screw 3
Rotation and horizontal movement；The other end of the first ball-screw 3 is connected with the first guide pillar base 7, and described first guide pillar 4 is fixed on
Between first shaft coupling 5.
Described vertical motion system includes the second motor 8, the second ball-screw 9, the second guide pillar 10, second shaft coupling
11, the second feed screw nut 12, the second guide pillar base 13, wherein, the second motor 8 passes through second shaft coupling 11 and the second ball
One end of leading screw 9 connects, and the second ball-screw 9 is provided with the second feed screw nut 12, and the second feed screw nut 12 can be with the second rolling
The rotation of ballscrew 9 and move vertically up and down；The other end of the second ball-screw 9 is connected with the second guide pillar base 13, and described
Two guide pillars 10 are fixed between second shaft coupling 11.
The outside of described second guide pillar 10 is fixed on ultrasonic servo system base 1, thus realizing the fixation of servo system.
The one end in described first guide pillar 4 outside is fixed on the second feed screw nut 6, when the second feed screw nut is vertical about 6
During motion, horizontal movement system moves up and down vertically also with the second feed screw nut 6.
Described first feed screw nut 6 is also connected with u-shaped connector 14, and the both sides of u-shaped connector 14 are provided with screw, by spiral shell
Hole and fastening bolt are connected with chamfered edge sleeve block 15.Chamfered edge sleeve block 15 is radially provided with jackscrew, and jackscrew clamps ultrasonic amplitude transformer
16.By adjusting fastening bolt, chamfered edge sleeve block 15 can rotate in u-shaped connector 14, thus adjusting ultrasonic amplitude transformer to folder
Tool or the applying angle of workpiece.
Described first motor 2 and the second motor 8 are also connected with control system, and control system controls motor
The method of operation.
Embodiment 2
Using above-mentioned auxiliary device, treat welding non-ferrous metal board and carry out ultrasonic wave added tungsten for 180*100*6mm copper plate
Electrode argon arc welding connects, and its welding step is as follows:
(1) copper plate is opened V-shaped groove, copper plate is clamped so that copper plate non-groove side using ultrasonic welding fixture
With the tight rigid contact of base 1-5 of ultrasonic welding fixture, as shown in Figure 1.Then copper plate is fixed with ultrasonic welding fixture
On jig.
(2) change adjustable angle insert 1-1, the described inclined-plane of adjustable angle insert 1-1 and the angle of its basal surface are
90 °, make sound wave incident with shear wave form, the thickness apart from adjustable cushion block 1-2 is taken 10mm, then fixed using u clamp, realize
The top and bottom of ultrasonic welding fixture and side and the tight rigid contact of copper plate.
(3) by ultrasonic amplitude transformer 16 clamping on ultrasonic servo system, the height of adjustment weld jig makes ultrasonic amplitude transformer
The inclined-plane of adjustable angle insert 1-1 in 16 ends and ultrasonic welding fixture completely attaches to.
Completely attach to and refer to that ultrasonic amplitude transformer 16 extreme ends surface and the inclined-plane of angle adjustable insert 1-1 completely attach to,
I.e. ultrasonic amplitude transformer 16 is perpendicular with inclined-plane.
(4) start argon tungsten-arc welding electromechanical source, welding gun striking, after arc stability, start ultrasonic-frequency power supply output sound wave, weldering
Rifle plays weldering, striking current 180a, welding current 220a with 2mm/s speed, receives arc current 180a, speed of welding 2mm/s, shielding gas
Flow 10l/min.The operating power of ultrasonic-frequency power supply is 1500w, incident ultrasound wave work after transducing and ultrasonic variable amplitude bar amplification
Working frequency is 20khz, and amplitude is 20 μm, and after sound wave applies the 2s time, the leading screw in motor system controls ultrasonic amplitude transformer 16 to lift
Rise and be allowed to separate with adjustable angle insert 1-1, with the speed of 6mm/s along after welding direction in the same direction horizontal movement 2s, control ultrasonic
Horn 16 fall contact with adjustable angle insert 1-1 continue to ultrasonic, application time be 4s, by that analogy, realize ultrasonic
Horn 16 and welding gun synchronicity and synchronism.
(5) it is welded to workpiece afterbody and receives arc, close welding machine electric power, lift ultrasonic amplitude transformer 16, stop ultrasonication closing super
Acoustic-electric source.
Welding effect is shown in Fig. 5 d and Fig. 6 a, Fig. 6 b and Fig. 6 c.
Embodiment 3
Using above-mentioned auxiliary device, treat the copper plate that welding non-ferrous metal board is 180*100*6mm and carry out ultrasonic wave added
Gas Tungsten Arc Welding, its welding step is as follows:
(1) copper plate is opened V-shaped groove, copper plate is clamped so that copper plate non-groove side using ultrasonic welding fixture
With the tight rigid contact of base 1-5 of ultrasonic welding fixture, as shown in Figure 1.Then copper plate is fixed with ultrasonic welding fixture
On jig.
(2) remove adjustable angle insert 1-1, make ultrasonic amplitude transformer 16 be applied directly to the upper table apart from adjustable cushion block 1-2
On face, the thickness apart from adjustable cushion block 1-2 takes 10mm, makes sound wave incident with longitudinal waves.
(3) by ultrasonic amplitude transformer 16 clamping on ultrasonic servo system, the height of adjustment weld jig makes ultrasonic amplitude transformer
The upper surface of the distance adjustable cushion block 1-2 in 16 ends and ultrasonic welding fixture completely attaches to.
(4) start argon tungsten-arc welding electromechanical source, welding gun striking, after arc stability, start ultrasonic-frequency power supply output sound wave, weldering
Rifle plays weldering, striking current 180a, welding current 220a with 2mm/s speed, receives arc current 180a, speed of welding 2mm/s, shielding gas
Flow 10l/min.The operating power of ultrasonic-frequency power supply is 1500w, incident ultrasound wave work after transducing and ultrasonic variable amplitude bar amplification
Working frequency is 20khz, and amplitude is 20 μm, and after sound wave applies the 2s time, the leading screw in motor system controls ultrasonic amplitude transformer 16 to lift
Rise and be allowed to separate with adjustable angle insert 1-1, with the speed of 6mm/s along after welding direction in the same direction horizontal movement 2s, control ultrasonic
Horn 16 fall contact with adjustable angle insert 1-1 continue to ultrasonic, application time be 4s, realize the ultrasonic of a cycle
Apply.By that analogy, ultrasonic amplitude transformer 16 and welding gun synchronicity and synchronism are realized.
(5) it is welded to workpiece afterbody and receives arc, close welding machine electric power, lift ultrasonic amplitude transformer 16, stop ultrasonication closing super
Acoustic-electric source.
Welding effect is shown in Fig. 6 a, Fig. 6 b and Fig. 6 c.
Embodiment 4
Using above-mentioned auxiliary device, treat the copper plate that welding non-ferrous metal board is 180*100*6mm and carry out ultrasonic wave added
Gas Tungsten Arc Welding, its welding step is as follows:
(1) copper plate is opened V-shaped groove, copper plate is clamped so that copper plate non-groove side using ultrasonic welding fixture
With the tight rigid contact of base 1-5 of ultrasonic welding fixture, as shown in Figure 1.Then copper plate is fixed with ultrasonic welding fixture
On jig.
(2) change adjustable angle insert 1-1, the described inclined-plane of adjustable angle insert 1-1 and the angle of its basal surface are
30 °, the thickness apart from adjustable cushion block 1-2 takes 10mm, makes sound wave incident with compressional wave shear wave complex wave form, then adopts u clevis
Tool is fixed, and realizes top and bottom and side and the tight rigid contact of copper plate of ultrasonic welding fixture.
(3) by ultrasonic amplitude transformer 16 clamping on ultrasonic servo system, the height of adjustment weld jig makes ultrasonic amplitude transformer
The inclined-plane of adjustable angle insert 1-1 in 16 ends and ultrasonic welding fixture completely attaches to.
Completely attach to and refer to that ultrasonic amplitude transformer 16 extreme ends surface and the inclined-plane of adjustable angle insert 1-1 completely attach to,
I.e. ultrasonic amplitude transformer 16 is perpendicular with inclined-plane.
(4) start argon tungsten-arc welding electromechanical source, welding gun striking, after arc stability, start ultrasonic-frequency power supply output sound wave, weldering
Rifle plays weldering, striking current 180a, welding current 220a with 2mm/s speed, receives arc current 180a, speed of welding 2mm/s, shielding gas
Flow 10l/min.The operating power of ultrasonic-frequency power supply is 1500w, incident ultrasound wave work after transducing and ultrasonic variable amplitude bar amplification
Working frequency is 20khz, and amplitude is 20 μm, and after sound wave applies the 2s time, the leading screw in motor system controls ultrasonic amplitude transformer 16 to lift
Rise and be allowed to separate with adjustable angle insert 1-1, with the speed of 6mm/s along after welding direction in the same direction horizontal movement 2s, control ultrasonic
Horn 16 fall contact with adjustable angle insert 1-1 continue to ultrasonic, application time be 4s, realize the ultrasonic of a cycle
Apply.By that analogy, ultrasonic amplitude transformer 16 and welding gun synchronicity and synchronism are realized.
(5) it is welded to workpiece afterbody and receives arc, close welding machine electric power, lift ultrasonic amplitude transformer 16, stop ultrasonication closing super
Acoustic-electric source.Welding effect is shown in Fig. 5 a and Fig. 6 a, Fig. 6 b and Fig. 6 c.
Embodiment 5
Using above-mentioned auxiliary device, treat the copper plate that welding non-ferrous metal board is 180*100*6mm and carry out ultrasonic wave added
Gas Tungsten Arc Welding, its welding step is as follows:
(1) copper plate is opened V-shaped groove, copper plate is clamped so that copper plate non-groove side using ultrasonic welding fixture
With the tight rigid contact of base 1-5 of ultrasonic welding fixture, as shown in Figure 1.Then copper plate is fixed with ultrasonic welding fixture
On jig.
(2) change adjustable angle insert 1-1, the described inclined-plane of adjustable angle insert 1-1 and the angle of its basal surface are
45 °, the thickness apart from adjustable cushion block 1-2 takes 10mm, makes sound wave incident with compressional wave shear wave complex wave form, then adopts u clevis
Tool is fixed, and realizes top and bottom and side and the tight rigid contact of copper plate of ultrasonic welding fixture.
(3) by ultrasonic amplitude transformer 16 clamping on ultrasonic servo system, the height of adjustment weld jig makes ultrasonic amplitude transformer
The inclined-plane of adjustable angle insert 1-1 in 16 ends and ultrasonic welding fixture completely attaches to.
Completely attach to and refer to that ultrasonic amplitude transformer 16 extreme ends surface and the inclined-plane of adjustable insert completely attach to, i.e. ultrasonic change
Width bar 16 is perpendicular with inclined-plane.
(4) start argon tungsten-arc welding electromechanical source, welding gun striking, after arc stability, start ultrasonic-frequency power supply output sound wave, weldering
Rifle plays weldering, striking current 180a, welding current 220a with 2mm/s speed, receives arc current 180a, speed of welding 2mm/s, shielding gas
Flow 10l/min.The operating power of ultrasonic-frequency power supply is 1500w, incident ultrasound wave work after transducing and ultrasonic variable amplitude bar amplification
Working frequency is 20khz, and amplitude is 20 μm, and after sound wave applies the 2s time, the leading screw in motor system controls ultrasonic amplitude transformer 16 to lift
Rise and be allowed to separate with adjustable angle insert 1-1, with the speed of 6mm/s along after welding direction in the same direction horizontal movement 2s, control ultrasonic
Horn 16 fall contact with adjustable angle insert 1-1 continue to ultrasonic, application time be 4s, realize the ultrasonic of a cycle
Apply. by that analogy, realize ultrasonic amplitude transformer 16 and welding gun synchronicity and synchronism.
(5) it is welded to workpiece afterbody and receives arc, close welding machine electric power, lift ultrasonic amplitude transformer 16, stop ultrasonication closing super
Acoustic-electric source.Welding effect is shown in Fig. 5 b and Fig. 6 a, Fig. 6 b and Fig. 6 c.
Embodiment 6
Using above-mentioned auxiliary device, treat the copper plate that welding non-ferrous metal board is 180*100*6mm and carry out ultrasonic wave added
Gas Tungsten Arc Welding, its welding step is as follows:
(1) copper plate is opened V-shaped groove, copper plate is clamped so that copper plate non-groove side using ultrasonic welding fixture
With the tight rigid contact of base 1-5 of ultrasonic welding fixture, as shown in Figure 1.Then copper plate is fixed with ultrasonic welding fixture
On jig.
(2) change adjustable angle insert 1-1, the described inclined-plane of adjustable angle insert 1-1 and the angle of its basal surface are
60 °, the thickness apart from adjustable cushion block 1-2 takes 10mm, makes sound wave incident with compressional wave shear wave complex wave form, then adopts u clevis
Tool is fixed, and realizes top and bottom and side and the tight rigid contact of copper plate of ultrasonic welding fixture.
(3) by ultrasonic amplitude transformer 16 clamping on ultrasonic servo system, the height of adjustment weld jig makes ultrasonic amplitude transformer
The inclined-plane of adjustable angle insert 1-1 in 16 ends and ultrasonic welding fixture completely attaches to.
Completely attach to and refer to that ultrasonic amplitude transformer 16 extreme ends surface and the inclined-plane of adjustable insert completely attach to, i.e. ultrasonic change
Width bar 16 is perpendicular with inclined-plane.
(4) start argon tungsten-arc welding electromechanical source, welding gun striking, after arc stability, start ultrasonic-frequency power supply output sound wave, weldering
Rifle plays weldering, striking current 170-190a, welding current 210-230a with 2mm/s speed, receives arc current 170-190a, speed of welding
2mm/s, shielding gas flow 10l/min.The operating power of ultrasonic-frequency power supply is 1500w, amplify through transducing and ultrasonic variable amplitude bar after
Incident ultrasound wave operating frequency is 20khz, and amplitude is 20 μm, and after sound wave applies the 2s time, the leading screw in motor system controls super
Sound horn 16 is lifted and is allowed to be separated with adjustable angle insert 1-1, with the speed of 6mm/s along welding direction horizontal movement 2s in the same direction
Afterwards, control ultrasonic amplitude transformer 16 fall contact with adjustable angle insert 1-1 continue to ultrasonic, application time be 4s, realize one
The ultrasonic applying in individual cycle.By that analogy, ultrasonic amplitude transformer 16 and welding gun synchronicity and synchronism are realized.
(5) it is welded to workpiece afterbody and receives arc, close welding machine electric power, lift ultrasonic amplitude transformer 16, stop ultrasonication closing super
Acoustic-electric source.Welding effect is shown in Fig. 4, Fig. 5 c and Fig. 6 a, Fig. 6 b and Fig. 6 c.
Embodiment 7
Using above-mentioned auxiliary device, treat the copper plate that welding non-ferrous metal board is 180*100*6mm and carry out ultrasonic wave added
Gas Tungsten Arc Welding, its welding step is as follows:
(1) copper plate is opened V-shaped groove, copper plate is clamped so that copper plate non-groove side using ultrasonic welding fixture
With the tight rigid contact of base 1-5 of ultrasonic welding fixture, as shown in Figure 1.Then copper plate is fixed with ultrasonic welding fixture
On jig.
(2) change adjustable angle insert 1-1, the described inclined-plane of adjustable angle insert 1-1 and the angle of its basal surface are
90 °, make sound wave incident with shear wave form, change apart from adjustable cushion block 1-2, thickness takes 50mm so that ultrasonic amplitude transformer is in far
Apply from weld metal zone.Then fixed using u clamp, top and bottom and the side of realizing ultrasonic welding fixture are closely firm with copper plate
Property contact.
(3) by ultrasonic amplitude transformer clamping on ultrasonic servo system, the height of adjustment weld jig makes ultrasonic amplitude transformer 16
The inclined-plane of adjustable angle insert 1-1 in end and ultrasonic welding fixture completely attaches to.
Completely attach to and refer to that ultrasonic amplitude transformer 16 extreme ends surface and the inclined-plane of adjustable angle insert 1-1 completely attach to,
I.e. ultrasonic amplitude transformer 16 is perpendicular with inclined-plane.
(4) start argon tungsten-arc welding electromechanical source, welding gun striking, after arc stability, start ultrasonic-frequency power supply output sound wave, weldering
Rifle plays weldering, striking current 170-190a, welding current 210-230a with 2mm/s speed, receives arc current 170-190a, speed of welding
2mm/s, shielding gas flow 10l/min.The operating power of ultrasonic-frequency power supply is 1500w, amplify through transducing and ultrasonic variable amplitude bar after
Incident ultrasound wave operating frequency is 20khz, and amplitude is 20 μm, and after sound wave applies the 2s time, the leading screw in motor system controls super
Sound horn 16 is lifted and is allowed to be separated with adjustable angle insert, with the speed of 6mm/s along after welding direction in the same direction horizontal movement 2s,
Control ultrasonic amplitude transformer 16 fall contact with adjustable angle insert 1-1 continue to ultrasonic, application time be 4s, realize a week
The ultrasonic applying of phase.By that analogy, ultrasonic amplitude transformer 16 and welding gun synchronicity and synchronism are realized.
(5) it is welded to workpiece afterbody and receives arc, close welding machine electric power, lift ultrasonic amplitude transformer 16, stop ultrasonication closing super
Acoustic-electric source.
Embodiment 8
Using above-mentioned auxiliary device, treat welding non-ferrous metal board and carry out ultrasonic wave added tungsten for 180*100*6mm copper plate
Electrode argon arc welding connects, and its welding step is as follows:
(1) copper plate is opened V-shaped groove, copper plate is clamped so that copper plate non-groove side using ultrasonic welding fixture
With the tight rigid contact of base 1-5 of ultrasonic welding fixture, as shown in Figure 1.Then copper plate is fixed with ultrasonic welding fixture
On jig.
(2) remove adjustable angle insert 1-1, so that ultrasonic amplitude transformer 16 is applied directly to apart from adjustable cushion block 1-2 upper surface
On, the thickness apart from adjustable cushion block 1-2 takes 10mm, makes sound wave incident with longitudinal waves, is then fixed using u clamp, realizes
The top and bottom of ultrasonic welding fixture and side and the tight rigid contact of copper plate.
(3) by ultrasonic amplitude transformer 16 clamping on ultrasonic servo system, the height of adjustment weld jig makes ultrasonic amplitude transformer
The inclined-plane of adjustable angle insert 1-1 in 16 ends and ultrasonic welding fixture completely attaches to.
Completely attach to and refer to that ultrasonic amplitude transformer 16 extreme ends surface and the inclined-plane of adjustable angle insert 1-1 completely attach to,
I.e. ultrasonic amplitude transformer 16 is perpendicular with inclined-plane.
(4) start argon tungsten-arc welding electromechanical source, welding gun striking, after arc stability, start ultrasonic-frequency power supply output sound wave, weldering
Rifle plays weldering, striking current 170a, welding current 210a with 2mm/s speed, receives arc current 170a, speed of welding 2mm/s, shielding gas
Flow 10l/min.The operating power of ultrasonic-frequency power supply is 1500w, incident ultrasound wave work after transducing and ultrasonic variable amplitude bar amplification
Working frequency is 20khz, and amplitude is 20 μm, and after sound wave applies the 2s time, the leading screw in motor system controls ultrasonic amplitude transformer 16 to lift
Rise and be allowed to separate with adjustable angle insert 1-1, with the speed of 6mm/s along after welding direction in the same direction horizontal movement 2s, control ultrasonic
Horn 16 fall contact with adjustable angle insert 1-1 continue to ultrasonic, application time be 4s, by that analogy, realize ultrasonic
Horn 16 and welding gun synchronicity and synchronism.
(5) it is welded to workpiece afterbody and receives arc, close welding machine electric power, lift ultrasonic amplitude transformer 16, stop ultrasonication closing super
Acoustic-electric source.
Embodiment 9
Using above-mentioned auxiliary device, treat welding non-ferrous metal board and carry out ultrasonic wave added tungsten for 180*100*6mm copper plate
Electrode argon arc welding connects, and its welding step is as follows:
(1) copper plate is opened V-shaped groove, copper plate is clamped so that copper plate non-groove side using ultrasonic welding fixture
With the tight rigid contact of base 1-5 of ultrasonic welding fixture, as shown in Figure 1.Then copper plate is fixed with ultrasonic welding fixture
On jig.
(2) remove adjustable angle insert 1-1, so that ultrasonic amplitude transformer 16 is applied directly to apart from adjustable cushion block 1-2 upper surface
On, the thickness apart from adjustable cushion block 1-2 takes 10mm, makes sound wave incident with longitudinal waves, is then fixed using u clamp, realizes
The top and bottom of ultrasonic welding fixture and side and the tight rigid contact of copper plate.
(3) by ultrasonic amplitude transformer 16 clamping on ultrasonic servo system, the height of adjustment weld jig makes ultrasonic amplitude transformer
The inclined-plane of adjustable angle insert 1-1 in 16 ends and ultrasonic welding fixture completely attaches to.
Completely attach to and refer to that ultrasonic amplitude transformer 16 extreme ends surface and the inclined-plane of adjustable angle insert 1-1 completely attach to,
I.e. ultrasonic amplitude transformer 16 is perpendicular with inclined-plane.
(4) start argon tungsten-arc welding electromechanical source, welding gun striking, after arc stability, start ultrasonic-frequency power supply output sound wave, weldering
Rifle plays weldering, striking current 190a, welding current 230a with 2mm/s speed, receives arc current 190a, speed of welding 2mm/s, shielding gas
Flow 10l/min.The operating power of ultrasonic-frequency power supply is 1500w, incident ultrasound wave work after transducing and ultrasonic variable amplitude bar amplification
Working frequency is 20khz, and amplitude is 20 μm, and after sound wave applies the 2s time, the leading screw in motor system controls ultrasonic amplitude transformer 16 to lift
Rise and be allowed to separate with adjustable angle insert 1-1, with the speed of 6mm/s along after welding direction in the same direction horizontal movement 2s, control ultrasonic
Horn 16 fall contact with adjustable angle insert 1-1 continue to ultrasonic, application time be 4s, by that analogy, realize ultrasonic
Horn 16 and welding gun synchronicity and synchronism.
(5) it is welded to workpiece afterbody and receives arc, close welding machine electric power, lift ultrasonic amplitude transformer 16, stop ultrasonication closing super
Acoustic-electric source.
The results showed:
When not applying ul-trasonic irradiation, no filled silk tig built-up welding to the thick copper plate of 6mm, and postwelding seam organization is
Column α-cu, grain crystalline direction, perpendicular to the normal direction of melt run, grows to Weld pipe mill.In the molten bath of last crystallization
Heart district domain, defines fire check (as shown in Figure 3) in column crystal intergranular position.
When applying ul-trasonic irradiation, no filled silk tig built-up welding to 6mm copper plate, and postwelding is in fusion area no fire check
Occur.α-the cu that seam organization is distributed for graininess, crystallite dimension is significantly less than the weld grain of no ultrasonication, and molten
The long general orientation closing the crystal grain in district center region is to weld pool surface growth, and this direction of growth is conducive to final set region
Oxygen-enriched, sulfur, phosphorus liquid phase be discharged to weld pool surface, it is to avoid it forms the liquid film being easily caused fire check on α-cu crystal boundary, from
And effectively prevent fire check and (as shown in Figure 4) occurs.Additionally, further looking at discovery, in α-cu intra-die, define little
Spherical α-the cu of size, this is because ultrasonic cavitation and acoustic streaming act on and there occurs following 2 effects in crystallization process: one is
Increase the nucleation rate of α-cu；Two is to have crushed thick column α-cu.Crystallite dimension is substantially diminished, shape is by column mistake
Cross spherical.Improvement crystallization process, the purpose of grain refinement effect are reached.When ultrasonic incident angle changes, that is, sound wave with
The amount of incident of compressional wave and shear wave in change, find the trend of crystal grain, thinning effect and weld properties significantly different (as Fig. 5,
Fig. 6 a, Fig. 6 b and Fig. 6 c), integrative organization and mechanical property find, when ultrasonic apply complex wave with 60 ° when, crystal grain is closest to circle
Spherical and size is minimum, comprehensive mechanical property (hardness, tensile strength and elongation percentage) is best.
Although the above-mentioned accompanying drawing that combines is described to the specific embodiment of the present invention, not model is protected to the present invention
The restriction enclosed, one of ordinary skill in the art should be understood that on the basis of technical scheme, and those skilled in the art are not
Need to pay the various modifications that creative work can make or deformation still within protection scope of the present invention.
Claims (11)
1. a kind of sound source incident angle and position adjustable ultrasonic wave added argon arc welding auxiliary device, is characterized in that, including ultrasonic bond
Welding fixture and ultrasonic servo system, the ultrasonic amplitude transformer that described ultrasonic servo system passes through in ultrasonic equipment is pressed from both sides with ultra-sonic welded
Tool contact；
Wherein:
Described ultrasonic welding fixture, including one have bevelled adjustable angle insert, apart from adjustable cushion block, height adjustable briquetting and
Base, the vertical plane of described adjustable angle insert is connected with the first side apart from adjustable cushion block, described apart from adjustable cushion block
The upper part of the opposite face of first side is connected with height adjustable briquetting, and height adjustable briquetting can move down on relative cushion block work
Dynamic, the lower part connect base of the opposite face of the described first side apart from adjustable cushion block, the basal surface of height adjustable briquetting with
The upper surface of base is provided with the space placing workpiece to be welded, and described connection is flexible connection；
Described ultrasonic servo system, including horizontal movement system, vertically movable system and ultrasonic servo system base, described vertical
Motor system is arranged on ultrasonic servo system base；Described horizontal movement system and vertically movable system all include stepping electricity
Machine, leading screw and guide pillar；Described motor is connected with leading screw by shaft coupling, and the leading screw of vertically movable system is provided with can be up and down
Second feed screw nut of motion, the second feed screw nut connects horizontal movement system, and the leading screw of horizontal movement system is provided with can water
First feed screw nut of flat motion；First feed screw nut is connected with connector, and described connector connects can fix ultrasonic amplitude transformer
Sleeve block.
2. device as claimed in claim 1, is characterized in that: the inclined-plane of described adjustable angle insert and the angle model of its basal surface
Enclose for 0 ＜ α≤90 °.
3. device as claimed in claim 1, is characterized in that: the described thickness apart from adjustable cushion block is 10～50mm.
4. adopt the sound source incident angle and position adjustable ultrasonic wave added argon arc of the arbitrary described auxiliary device of claims 1 to 3
Soldering method, is characterized in that, including following methods:
(1) prepare before welding: machining workpiece to be welded butting grooves are in v shape, clamp work to be welded using ultrasonic welding fixture
Part, weld jig is fixed on jig, by the ultrasonic amplitude transformer clamping of ultrasonic equipment on ultrasonic servo system, makes
The inclined-plane of adjustable angle insert in the end of ultrasonic amplitude transformer and weld jig or the upper surface apart from adjustable cushion block；
(2) weld: determine the technological parameter of argon arc welding, start argon arc welding machine power supply, welding gun striking, after arc stability, start
The ultrasonic-frequency power supply output sound wave of ultrasonic equipment；
Welding gun plays weldering with setting speed, and after ultrasound wave applies setting time, the leading screw of horizontal movement system controls ultrasonic variable amplitude
Bar is allowed to separate with adjustable angle insert, after welding direction in the same direction motion certain distance, controls ultrasonic amplitude transformer to fall and angle
Spend the contact of adjustable insert and continue to ultrasonic, by that analogy, realize ultrasonic amplitude transformer and welding gun synchronicity and synchronism；
(3) it is welded to workpiece afterbody to be welded and receives arc, close welding machine electric power, lift ultrasonic amplitude transformer, stop ultrasonication closing super
Acoustic-electric source.
5. method as claimed in claim 4, is characterized in that: in step (1), described workpiece to be welded is non-ferrous metal, and it is thick
Spend for 6-15mm.
6. method as claimed in claim 5, is characterized in that: described non-ferrous metal is copper, copper alloy or aluminium alloy.
7. method as claimed in claim 4, is characterized in that: in step (1), the non-groove side of described workpiece to be welded and bottom
Seat closely rigid contact, then using u-shaped fixture, ultrasonic welding fixture is fixed on jig.
8. method as claimed in claim 4, is characterized in that: in step (1), by the adjustable angle edge from different angles
Block, makes the applying angle of ultrasonic amplitude transformer adjustable at 0～90 °, horn end directly acts on adjustable angle insert inclined-plane
Or on the upper surface of adjustable cushion block, make sound wave incident with compressional wave, shear wave or compressional wave shear wave complex wave form respectively.
9. method as claimed in claim 4, is characterized in that: in step (1), by the adjustable pad of distance from different-thickness
Block, makes ultrasonic amplitude transformer and the distance of weld seam change in the range of 110-160mm, makes sound wave respectively in nearly weld metal zone and remote weld seam
Area is incident.
10. method as claimed in claim 4, is characterized in that: in step (2), the technological parameter of described argon arc welding is: starting the arc electricity
Flow for 150～190a, welding current is 170～230a, receives arc current 150～190a, speed of welding 2～4mm/s, protective gas
Flow is 5～10l/min.
11. methods as claimed in claim 4, is characterized in that: in step (2), when the ultrasonic-frequency power supply starting ultrasonic equipment is defeated
After going out sound wave, after amplifying through transducing and ultrasonic variable amplitude bar, incident ultrasound wave operating frequency is 15-25khz, and amplitude is 20-50 μ
m.
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| CN105710512A (en) * | 2016-03-03 | 2016-06-29 | 天津大学 | Gas metal arc welding system based on near-field ultrasonic suspension technology |
| CN105643063A (en) * | 2016-03-03 | 2016-06-08 | 天津大学 | Gas tungsten arc welding system based on near-field ultrasonic levitation technology |
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