CN207155006U - A kind of laser welding system - Google Patents
A kind of laser welding system Download PDFInfo
- Publication number
- CN207155006U CN207155006U CN201720804654.9U CN201720804654U CN207155006U CN 207155006 U CN207155006 U CN 207155006U CN 201720804654 U CN201720804654 U CN 201720804654U CN 207155006 U CN207155006 U CN 207155006U
- Authority
- CN
- China
- Prior art keywords
- weldment
- laser welding
- welding system
- magnetic field
- molten bath
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Laser Beam Processing (AREA)
Abstract
The utility model discloses a kind of laser welding system, wherein system includes two transverse rotating magnetic field generators positioned at the weld seam both sides of weldment, and the supersonic generator above the weld seam of weldment, transverse rotating magnetic field generator are located on same vertical face with supersonic generator.Laser welding system provided by the utility model, the superposition of transverse rotating magnetic field and ultrasonic field can be achieved, during to molten bath process of setting, both horizontally and vertically applying Lorentz force and compressional wave makes molten bath sufficiently be stirred in all directions, so that the weld seam of solidification obtains finer crystal grain；Ultrasonic field is ultrasonically treated the small deficiency of sphere of action with that under electromagnetic field compound action, can be effectively improved, and ultrasonic field cavitation can also strengthen thinning effect of the electromagnetic agitation to tissue, and the solidified structure refinement to molten bath is very helpful；The intervention of Composite Field makes molten bath each position crystal grain refinement, reduces the generation of stomata, can optimize the scope of each welding parameter.
Description
Technical field
Welding field is the utility model is related to, more particularly to a kind of laser welding system.
Background technology
As manufacturing powerhouse, laser welding is widely used in industry manufacture field, such as automobile making, construction industry in China
With military field etc..Laser welding is the characteristics of utilizing laser instantaneous energy density high, to pass through the heat of laser beam and metal material
Energy transmission and effect, metal material is changed into the process of molten condition cooled and solidified again, but because laser power is excessive,
The change of the keyhole form of welding process, the flowing of metallic vapour, the crystal grain when generation of splashing can all solidify to molten metal
Tissue has an impact, and then influences appearance of weld.
At present, in order to improve weldquality, typically following four method is used：
1st, the technological parameter in laser beam welding is adjusted：Speed of welding, welding laser power, protective gas flow velocity,
Defocusing amount etc., to improve the defects of being produced in laser welding；
The above method, substantial amounts of experimental data is needed just to improve appearance of weld by the regulation of laser welding process parameter
Optimal welding parameter can be obtained, and the welding parameter required for the welding of different metal material is different, complex process, ginseng
Number determines cumbersome.
The 2nd, transverse rotating magnetic field is set：The continuous cutting magnetic line of molten pool metal behind application magnetic field, so as to be stirred simultaneously constantly
Wash away solidification layer, now liquid-solid boundary forward position crystal and dendrite fragmentation, come off, cause stronger temperature fluctuation, strengthen crystal and take off
Fall later forming core proliferation function and obtain fine crystals, so as to improve weldquality；
The above method, influence of the transverse rotating magnetic field to molten bath can only in the horizontal direction, and the stirring to molten bath is not enough filled
Point, when exciting current is less than critical value on appearance of weld without influence.
The 3rd, ultrasonic generator is set：Acted on by ultrasonic vibration on welded plate, reduce the generation of weld porosity, optimization weldering
Across the state conversion stage such as the formation, flowing and solidification in molten bath is connect, reaches the effect for improving seam organization；
The above method, ultrasound device of having an effect act on molten bath by transmission method.Get in ultrasonication positional distance molten bath
Far, its action effect is poorer, and sphere of action is more restricted.Arc-ultrasonic is longitudinal wave propagation in molten bath, the crystalline substance among fusion area
Grain degree of refinement is better than both sides welding toe.
4th, the coating activating agent in welding plate, the depth and weld seam of undercut in laser beam welding can effectively be changed
Molten wide and reinforcement, improve seam center；
The above method, the addition of the activating agent of heterogeneity can make weld pool width, reinforcement etc. with the wish of user
Parameter increases or reduced, and improves weld seam appearance.The addition of single activating agent can increase the stomatal number of the melting area of welding seam.Some are lived
Property agent (Cr2O3) fusion area can be made metal inclusion phenomenon occur, and the Laser Welding welding point tensile strength in addition activating agent is equal
The shortcoming such as lower than the tensile strength of inactive dose of Laser Welding welding point.
In the prior art, it is every kind of to improve the quality of weld seam typically using any one method in above-mentioned four kinds of methods
Method all has the shortcomings that it is more obvious, not notable for the improvement of weldquality.
Therefore, the quality of weld seam how is effectively improved, is the current technical issues that need to address of those skilled in the art.
Utility model content
The purpose of this utility model is to provide a kind of laser welding system, for refining the crystal grain in molten bath so that solidification
Tissue distribution is more uniform, improves anticorrosive and mechanical property, reduces the generation of bubble.
To achieve the above object, the utility model provides following technical scheme：
A kind of laser welding system, including two transverse rotating magnetic field generators positioned at the weld seam both sides of weldment, and
Supersonic generator above the weld seam of the weldment, the transverse rotating magnetic field generator and the supersonic generator
On same vertical face.
Preferably, positioned at the weld seam both sides the transverse rotating magnetic field generator line, with the ultrasonic wave send out
Point of interface immediately below raw device is located in the molten bath of the weldment.
Preferably, in addition to the laser head on the lathe and above the weld seam of the weldment.
Preferably, the weldment is docking weldment.
Preferably, the weldment is nonmagnetic substance.
Preferably, the transverse rotating magnetic field generator is alternating current rotating magnetic field generator, also, exchanges rotating excitation field
Intensity can be adjusted by a-c cycle, the a-c cycle is 8hz~12hz.
Preferably, the supersonic generator includes ultrasonic vibration source, transducer, ultrasonic transformer and tool heads, above-mentioned super
Power frequency electric can be converted into high power by acoustic vibration source, high-frequency electric current is supplied to the transducer, the transducer by its
Mechanical vibrational energy is converted into, the tool heads will be sent to by the ultrasonic transformer after Amplitude amplification, so as to act on melt.
Preferably, the bottom of the tool heads and the distance above the molten bath are 0.5~1mm.
Laser welding system provided by the utility model, including two transverse rotation magnetic positioned at the weld seam both sides of weldment
Field generator, and the supersonic generator above the weld seam of the weldment, the transverse rotating magnetic field generator and institute
Supersonic generator is stated to be located on same vertical face.The laser welding system, sent out by transverse rotating magnetic field generator and ultrasonic wave
The setting of raw device, it is possible to achieve the superposition of transverse rotating magnetic field and ultrasonic field, during to molten bath process of setting, in the horizontal direction and hang down
Nogata makes molten bath sufficiently be stirred in all directions to Lorentz force and compressional wave is applied, so that the weld seam of solidification obtains more
Fine crystal grain；Ultrasonic field is ultrasonically treated the small deficiency of sphere of action, ultrasound with that under electromagnetic field compound action, can be effectively improved
Field cavitation can also strengthen thinning effect of the electromagnetic agitation to tissue, compound action weld seam process of setting by both, to molten
The solidified structure refinement in pond is very helpful；The intervention of Composite Field is refined molten bath each position crystal grain, and can be more preferable
Reduction stomata generation, in certain aspect, the scope of each welding parameter can be optimized.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, drawings in the following description are only
It is some embodiments of the utility model, for those of ordinary skill in the art, is not paying the premise of creative work
Under, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of structural representation of embodiment of laser welding system provided by the utility model；
Wherein：1- supersonic generators, 2- weldments, 3- transverse rotating magnetic fields generator, 4- molten baths, 5- ultrasonic transformers, 6- works
Has head.
Embodiment
Core of the present utility model is to provide a kind of laser welding system, can refine the crystal grain in molten bath so that solidification
Tissue distribution is more uniform, improves anticorrosive and mechanical property, reduces the generation of bubble, be effectively improved weldquality.
In order that those skilled in the art more fully understand the utility model, below in conjunction with the accompanying drawings and it is embodied
The utility model is described in further detail for mode.
Fig. 1 is refer to, Fig. 1 is that a kind of structure of embodiment of laser welding system provided by the utility model is shown
It is intended to.
In this embodiment, laser welding system includes transverse rotating magnetic field generator 3 and supersonic generator 1.
Wherein, the number of transverse rotating magnetic field generator 3 is two, respectively positioned at the weld seam both sides of weldment 2, ultrasonic wave hair
Raw device 1 is located above the weld seam of weldment 2, and transverse rotating magnetic field generator 3 is located on same vertical face with supersonic generator 1, horizontal
To rotating magnetic field generator 3, i.e. excitation unit, acoustic cavitation and acoustic streaming caused by caused transverse rotating magnetic field and power ultrasonic
In the case that effect is mutually promoted, caused spiral Composite Field makes in laser beam welding that molten bath 4 is comprehensive sufficiently to be stirred
Mix, melt is forced fully agitation so as to obtain grain structure refinement, the weldering that composition is uniform, surface quality is good and stomata is less
Seam.And electromagnetic agitation can produce induction heat accordingly, temperature fluctuation of the molten bath 4 in solid liquid interface, caused shearing force can be aggravated
Dendritic arm can be made to fuse.
The laser welding system, pass through the setting of transverse rotating magnetic field generator 3 and supersonic generator 1, it is possible to achieve
The superposition of transverse rotating magnetic field and ultrasonic field, during to 4 process of setting of molten bath, both horizontally and vertically apply Lorentz force
Molten bath 4 is set sufficiently to be stirred in all directions with compressional wave, so that the weld seam of solidification obtains finer crystal grain；Ultrasonic field
The small deficiency of sphere of action is ultrasonically treated with that under electromagnetic field compound action, can be effectively improved, ultrasonic field cavitation can also
Strengthen thinning effect of the electromagnetic agitation to tissue, the two compound action weld seam process of setting refines to the solidified structure in molten bath 4
It is very helpful；The intervention of Composite Field is refined each position crystal grain of molten bath 4, and can preferably reduce the production of stomata
It is raw, in certain aspect, the scope of each welding parameter can be optimized.
On the basis of the respective embodiments described above, positioned at the line of the transverse rotating magnetic field generator 3 of weld seam both sides, with surpassing
Point of interface immediately below sonic generator 1 is located in the molten bath 4 of weldment 2, it is ensured that Composite Field is acted in molten bath 4, is ensured
The Solidification Quality in molten bath 4.
On the basis of the respective embodiments described above, in addition to swashing on lathe and above the weld seam of weldment 2
Shaven head, laser caused by laser head are beaten on the weld seam of weldment 2, after weldment 2 is melted, realize welding.
Explanation is needed exist for, in welding process, only weldment 2 moves, transverse rotating magnetic field generator 3, ultrasonic wave
The position of generator 1 and laser head is fixed, convenient operation.
On the basis of the respective embodiments described above, weldment 2 is docking weldment 2, i.e. the welding system is mainly used in two pieces
Steel plate, which is welded and fixed, to be structure as a whole.
Further, weldment 2 is specially nonmagnetic substance, can be steel plate, be specifically as follows stainless steel plate, high carbon steel sheet
Deng.
On the basis of the respective embodiments described above, transverse rotating magnetic field generator 3 is preferably alternating electromagnetic field generator.
Above-mentioned setting, relative to using direct current, rotating excitation field caused by alternating current more has a practicality, and parameter regulation is also more
Add conveniently, regulation voltage directly can directly change voltage according to transformer, and the intensity for exchanging rotating excitation field can also lead to
Overfrequency is adjusted, and optimal frequency is the secondary frequencies scope magnetic induction intensity value stabilization between 8hz~12hz.The increase of frequency,
Center magnetic induction intensity reduces in agitator.Because any metal has shielding action, stirring frequency increase, collection to alternating magnetic field
Skin layers thickness reduces, the shielding action enhancing to magnetic field, thus the magnetic induction intensity at agitator center reduces.
On the basis of the respective embodiments described above, supersonic generator 1 includes ultrasonic vibration source, transducer, ultrasonic transformer 5
With tool heads 6, wherein, power frequency electric can be converted into high power, high-frequency by ultrasonic vibration source as driving power, driving power
Electric current be supplied to transducer, high power, high-frequency electric current are converted into mechanical vibrational energy, then pass through ultrasonic transformer by transducer
5 will be sent to tool heads 6 after Amplitude amplification, so as to act on the melt in molten bath 4.
Preferably, the distance of the bottom of the tool heads 6 and the top of molten bath 4 is 0.5~1mm, is easy to vibrational energy to make
For whole molten bath 4.
Explanation is needed exist for, can be fastened between tool heads 6 and ultrasonic transformer 5 using connecting bolt, meanwhile, surpass
Sonic generator 1 can be arranged on the rear portion of laser head by bolt.
The welding system that the present embodiment is provided, the mechanism of action of transverse rotating magnetic field generator 3 are to utilize additional alternation
Magnetic field, rotating excitation field cut the liquid metal in laser weld pools 4, induced current, liquid are produced in the liquid metal of molten bath 4
Metal is equivalent to current－carrying conductor, is acted in rotating excitation field by electromagnetic force, thus, rotating excitation field makes liquid in molten bath 4
Metal produces rotary motion.
And supersonic generator 1 produces acoustic cavitation and acoustic streaming effect, strengthens pair in molten bath 4 by the vibration in molten bath 4
Stream, transverse rotating magnetic field and ultrasonic field it is compound so that the rotating excitation field in script molten bath 4 is changed into helical magnetic field, and then produces
Raw larger axial thrust load, axial component expand the area coverage and depth scope of ultrasonication, enhance ultrasonication dendrite,
The effect of thinning microstructure and power ultrasonic is greatly facilitated the raw core of outburst is realized in the whole molten bath 4, this is process of setting
The key of middle crystal grain thinning.Because rotating excitation field is changed into helical magnetic field, and with the collective effect of ultrasonic field, cause whole molten
The stronger agitation in pond 4, it on the one hand can make largely to solidify core caused by ultrasonic cavitation, on the other hand can make molten bath 4
Constantly fluctuation, the spilling speed of the bottom stomata of molten bath 4 can be accelerated, and then reduce the stomata quantity that weld seam retains in solidification.
On the basis of the respective embodiments described above, the line positioned at the transverse rotating magnetic field of the weld seam both sides of weldment 2 is vertical
In the bearing of trend of weld seam, likewise, supersonic generator 1 should be perpendicular to the surface layout of weldment 2.
The laser welding system that the present embodiment is provided, there is advantages below：
1st, after applying transverse rotating magnetic field and power ultrasonic Composite Field, Solidification Structure is in all directions in molten bath 4
Crystal grain has a certain degree of refinement, solidified structure thinning effect than single outer field action in the case of become apparent, and be distributed
It is more uniform；
2nd, transverse rotating magnetic field in the horizontal direction with direction of principal axis stirring caused by hypersonic flow complement each other by caused stirring, horizontal
It is changed into horizontal helical magnetic field to rotating excitation field, causes the strong agitation in whole molten bath 4, expands the coverage rate of ultrasonic cavitation
Product, strengthen the effect that ultrasonic destruction crushes dendrite, thinning microstructure；
3rd, horizontal helical magnetic field accelerates the radiating of the metal belt of molten bath 4 in laser beam welding, and cooling velocity is accelerated, will
Uniform thermal power caused by longitudinal ultrasonic ripple is distributed in whole molten bath 4, makes becoming apparent from for grain refinement, significantly improves the solidification of alloy
Tissue, anticorrosive and mechanical property.
4th, because ultrasonic field is beneficial to the generation of the stomata quantity in suppression molten bath 4, the axial force of transverse rotating magnetic field
Superposition deeply acts on ultrasonic vibration the whole bottom of laser weld pools 4 completely, improves the bottom stomata of molten bath 4 and overflows speed,
Stomata eradicating efficacy is set to be significantly improved.
5th, each laser weld parameters scope is optimized.
Laser welding system provided by the utility model is described in detail above.It is used herein specifically individual
Example is set forth to principle of the present utility model and embodiment, and the explanation of above example is only intended to help and understands this reality
With new scheme and its core concept.It should be pointed out that for those skilled in the art, this is not being departed from
On the premise of utility model principle, some improvement and modification can also be carried out to the utility model, these are improved and modification also falls
Enter in the protection domain of the utility model claims.
Claims (8)
1. a kind of laser welding system, it is characterised in that including two transverse rotating magnetic fields positioned at the weld seam both sides of weldment (2)
Generator (3), and the supersonic generator (1) above the weld seam of the weldment (2), the transverse rotating magnetic field occur
Device (3) is located on same vertical face with the supersonic generator (1).
2. laser welding system according to claim 1, it is characterised in that the laterally rotation positioned at the weld seam both sides
Turn the line of magnetic field generator (3), be located at the molten of the weldment (2) with the point of interface immediately below the supersonic generator (1)
In pond (4).
3. laser welding system according to claim 1, it is characterised in that also include being arranged on lathe and positioned at described
Laser head above the weld seam of weldment (2).
4. laser welding system according to claim 1, it is characterised in that the weldment (2) is docking weldment.
5. laser welding system according to claim 1, it is characterised in that the weldment (2) is nonmagnetic substance.
6. according to the laser welding system described in claim 1 to 5 any one, it is characterised in that the transverse rotating magnetic field
Generator (3) is alternating current rotating magnetic field generator, also, the intensity for exchanging rotating excitation field can be adjusted by a-c cycle, institute
It is 8hz~12hz to state a-c cycle.
7. according to the laser welding system described in claim 1 to 5 any one, it is characterised in that the supersonic generator
(1) ultrasonic vibration source, transducer, ultrasonic transformer (5) and tool heads (6) are included, above-mentioned ultrasonic vibration source can turn power frequency electric
Turn to high power, high-frequency electric current is supplied to the transducer, the transducer is translated into mechanical vibrational energy, passes through institute
The tool heads (6) will be sent to by stating ultrasonic transformer (5) after Amplitude amplification, so as to act on melt.
8. laser welding system according to claim 7, it is characterised in that the bottom of the tool heads (6) and the weldering
Distance above the molten bath (4) of part (2) is 0.5~1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720804654.9U CN207155006U (en) | 2017-07-04 | 2017-07-04 | A kind of laser welding system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720804654.9U CN207155006U (en) | 2017-07-04 | 2017-07-04 | A kind of laser welding system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207155006U true CN207155006U (en) | 2018-03-30 |
Family
ID=61712215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720804654.9U Active CN207155006U (en) | 2017-07-04 | 2017-07-04 | A kind of laser welding system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207155006U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109759686A (en) * | 2019-03-22 | 2019-05-17 | 哈尔滨工业大学（威海） | A kind of resistance spot welding method under controllable rotating magnetic fields |
| CN110587468A (en) * | 2019-10-16 | 2019-12-20 | 浙江工业大学 | Rotary polishing device and method for polishing by using liquid metal under electromagnetic field |
| CN111112839A (en) * | 2020-01-06 | 2020-05-08 | 南京航空航天大学 | Double-laser-beam bilateral synchronous welding device and method assisted by external magnetic field |
| CN111215970A (en) * | 2020-01-24 | 2020-06-02 | 北京理工大学 | Ultrasonic cavitation assisted ultrasonic magnetic polishing method for microstructure mold |
| CN112518095A (en) * | 2020-12-14 | 2021-03-19 | 浙江工业大学 | Special device for optimizing electron beam welding seam by external magnetic field pulse ultrasonic vibration |
| WO2021179414A1 (en) * | 2020-03-11 | 2021-09-16 | 江苏大学 | Molten pool morphology active intervention electromagnetic device |
| US11123826B1 (en) | 2020-03-11 | 2021-09-21 | Jiangsu University | Electromagnetic apparatus for active intervention to shape of molten pool |
| CN114833453A (en) * | 2022-06-09 | 2022-08-02 | 华中科技大学 | Welding method and welding device based on light beam and electromagnetic composite stirring |
-
2017
- 2017-07-04 CN CN201720804654.9U patent/CN207155006U/en active Active
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109759686A (en) * | 2019-03-22 | 2019-05-17 | 哈尔滨工业大学（威海） | A kind of resistance spot welding method under controllable rotating magnetic fields |
| CN110587468A (en) * | 2019-10-16 | 2019-12-20 | 浙江工业大学 | Rotary polishing device and method for polishing by using liquid metal under electromagnetic field |
| CN111112839A (en) * | 2020-01-06 | 2020-05-08 | 南京航空航天大学 | Double-laser-beam bilateral synchronous welding device and method assisted by external magnetic field |
| CN111112839B (en) * | 2020-01-06 | 2021-07-27 | 南京航空航天大学 | Double-laser-beam bilateral synchronous welding device and method assisted by external magnetic field |
| CN111215970A (en) * | 2020-01-24 | 2020-06-02 | 北京理工大学 | Ultrasonic cavitation assisted ultrasonic magnetic polishing method for microstructure mold |
| WO2021179414A1 (en) * | 2020-03-11 | 2021-09-16 | 江苏大学 | Molten pool morphology active intervention electromagnetic device |
| US11123826B1 (en) | 2020-03-11 | 2021-09-21 | Jiangsu University | Electromagnetic apparatus for active intervention to shape of molten pool |
| CN112518095A (en) * | 2020-12-14 | 2021-03-19 | 浙江工业大学 | Special device for optimizing electron beam welding seam by external magnetic field pulse ultrasonic vibration |
| CN114833453A (en) * | 2022-06-09 | 2022-08-02 | 华中科技大学 | Welding method and welding device based on light beam and electromagnetic composite stirring |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN207155006U (en) | A kind of laser welding system | |
| CN107252970A (en) | A kind of laser welding system and method | |
| Yuan et al. | Grain refining of Ti-6Al-4V alloy fabricated by laser and wire additive manufacturing assisted with ultrasonic vibration | |
| CN108213649B (en) | Material increase forming method and device for magnetic field control type electric arc robot | |
| CN113634763B (en) | Coaxial wire feeding laser additive manufacturing method combined with ultrasonic impact | |
| CN106735967A (en) | A kind of method of ultrasonic vibration assistant electric arc increasing material manufacturing control shape control | |
| CN101862913B (en) | Electromagnetic current coupling field assisted hybrid melting-brazing method for laser-TIG arc and equipment | |
| CN101143401B (en) | Moderate and high strength large-thickness component narrow gap or ultra-narrow gap magnetic control jet molten welding method | |
| da Cunha et al. | Ultrasound in arc welding: a review | |
| CN105458510B (en) | A kind of method for eliminating magnesium alloy welding stomata | |
| CN113070595B (en) | Narrow gap welding method assisted by alternative ultrasonic field | |
| Liu et al. | Wire and arc additive manufacturing of 4043 Al alloy using a cold metal transfer method | |
| CN205869704U (en) | Electromagnetic oscillation assists friction stir welding device | |
| CN108326429A (en) | A kind of ultrasonic wave added laser soldering device and method | |
| Saha et al. | Current status and development of external energy-assisted friction stir welding processes: a review | |
| Wang et al. | High-frequency pulse-modulated square wave AC TIG welding of AA6061-T6 aluminum alloy | |
| Dong et al. | Research status of welding technology of ferritic stainless steel | |
| Wang et al. | Research status of deep penetration welding of medium-thick plate aluminum alloy | |
| Fan et al. | Arc character and droplet transfer of pulsed ultrasonic wave-assisted GMAW | |
| CN113579479A (en) | Ultrasonic coupling electromagnetic stirring assisted laser additive manufacturing method | |
| Zhao et al. | Effect of ultrasonic vibration of molten pool on microstructure and mechanical properties of Ti-6Al-4V joints prepared via CMT+ P welding | |
| CN114734142B (en) | Thick-wall narrow-gap welding method for refining TC4 titanium alloy weld structure grains | |
| Wu et al. | Double pulse low-frequency modulation for high-power double-wire pulsed GMAW | |
| CN106238901A (en) | A kind of ultrasonic wave added agitating friction weldering soldering appliance and welding method | |
| CN106695125A (en) | System and method for improving laser processing surface integrity of workpiece on line |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |