CN108856973A - A kind of arc welding system of adjustable externally-applied magnetic field - Google Patents
A kind of arc welding system of adjustable externally-applied magnetic field Download PDFInfo
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- CN108856973A CN108856973A CN201810648710.3A CN201810648710A CN108856973A CN 108856973 A CN108856973 A CN 108856973A CN 201810648710 A CN201810648710 A CN 201810648710A CN 108856973 A CN108856973 A CN 108856973A
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/04—Welding for other purposes than joining, e.g. built-up welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/08—Arrangements or circuits for magnetic control of the arc
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
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- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Arc Welding Control (AREA)
Abstract
The invention proposes a kind of arc welding system of adjustable externally-applied magnetic field, this welding system is to be terminated to power supply unit output on coil using electric magnetisation principle, opens after power supply the magnetic field of additional one controllable intensity size in the welding process.Under the influence of a magnetic field, concussion stirring action can be carried out to molten bath, changes the crystalline condition of welding crystal grain, makes crystal grain refinement, be improved crystallization uniformity；Solidification cracking and stomata sensitivity are reduced, improves welding quality comprehensively；And Loulun magnetism can be generated to welding arc plasma, promote welding arc to rotate, changes welding arc characteristic, influence appearance of weld.Externally-applied magnetic field device is fixed on welding gun using fastenings such as bearing, bolts, keep entire externally-applied magnetic field device mobile synchronous with welding gun and can be rotated around welding gun.Using motor driven and gear cooperation to achieve the effect that plus system pivoting, and it can change revolving speed or carry out speed-changing rotation movement.
Description
Technical field
The present invention relates to welding technology field more particularly to a kind of arc welding systems of adjustable externally-applied magnetic field.
Background technique
Increasing material manufacturing (Additive Manufacturing, AM) technology is based on discrete-accumulation principle, by part three-dimensional
Data-driven, using the rapid prototyping technology for the method manufacture entity component that material successively adds up.The manufacturing process sharpest edges
It is, reduction process, shortening product manufacturing period i.e. formable without traditional cutter, particularly suitable for inexpensive be pilot system
It makes, and the product that structure is complicated, raw material added value is high, the advantage rapidly and efficiently shaped is more significant, navigates in aviation
It, biomedicine, derived energy chemical, the fields such as minute manufacturing there is broad prospect of application.In material increasing field, using electric arc as
The metal parts increases material manufacturing technology of heat source has many advantages, such as that equipment is simple, stock utilization is high, high production efficiency.Electric arc increases material
Manufacturing technology is melted metal wire material as heat source using electric arc, synusia is accumulated on substrate by setting forming path, layer by layer heap
It applies until metal parts shapes.Formation of parts is made of full weld metal, and consistency is high, metallurgical bonding performance is good, chemical component
Uniformly, mechanical property is good.Therefore, electric arc increases the important research direction that material technology is direct metal fabricating.
In recent years, along with the progress of material science, various new welding technologies are continuously emerged, to meet modern structure material
The welding demand of material, and introducing magnetic field control in the welding process is exactly one of the advanced technology for meeting this demand.It is welding
Externally-applied magnetic field can promote electric arc to rotate in the process, change the radial distribution of plasma jet and current density in electric arc, thus shadow
Ring the forming of the heating fusing and weld seam of base material.In molten bath, by the effect of electromagnetic agitation, change the crystallization direction of crystal grain,
Thinning microstructure can be improved mechanical property.Arc welding system is by welding gun, welding wire, wire feeder, mechanism of supplying gas, welding machine, work
Platform, control system composition, since welding demand is various, converted products model size is also different, traditional additional magnetic
Field device is no longer satisfied demand, thus the research of flexible adjustable externally-applied magnetic field device just very it is necessary to.And with
It is limited only to the opposite static magnetic field of welding gun toward to the research of externally-applied magnetic field, for rotary motion, opposite molten bath position is continuous
Influence of the variation magnetic field to welding is not yet studied.
Summary of the invention
Based on the above issues, the invention reside in provide a kind of influence that can be used for study movement magnetic field to welding, can revolve
Turn and can adjust in the welding process externally-applied magnetic field arc welding system of the magnetic field with respect to welding torch position.
In view of the above problems, providing following technical solution：A kind of arc welding system of adjustable externally-applied magnetic field, including
Motor, welding set and externally-applied magnetic field device, the welding set include welding gun and the welding wire for being plugged in welding gun end, institute
It states and is arranged with fixed gear on welding gun, be equipped with below the fixed gear and cover the bearing on welding gun, the externally-applied magnetic field device
Including shell and coil, the shell be equipped be adapted to welding gun and section in arc-shaped support plate, in the support plate
Equipped with the fixing groove with bearing adapter, the bearing is fixed in fixing groove by bolts and nuts, and the motor is located at shell
On, the motor shaft is arranged across shell, and the first gear engaged with fixed gear, the shell are arranged on the motor shaft
It is inside equipped with elevating lever, the coil is equipped with the connecting rod being connected with elevating lever bottom end, and the coil is located at below welding gun, institute
The side wall for stating shell is equipped with fixed block, and the fixed block is equipped with for the power supply unit to coil power supply.
In above structure, externally-applied magnetic field device is adapted to by support plate with welding gun, and mutually solid by bolt, nut and bearing
It is fixed, so that externally-applied magnetic field device is connected with welding gun.Motor control motor shaft rotation, drive first gear rotation, first gear with
Fixed gear is meshed, so that externally-applied magnetic field device can be rotated around welding gun.Support plate setting is in the arc-shaped can be true
Protect externally-applied magnetic field device and the more stable combination of welding gun.The output of power supply unit terminates on coil, is welding after opening power supply
An additional magnetic field in the process.Under the influence of a magnetic field, concussion stirring action can be carried out to molten bath, change the knot of welding crystal grain
Crystalline condition, makes crystal grain refinement, is improved crystallization uniformity；Solidification cracking and stomata sensitivity are reduced, keeps welding quality complete
It improves in face；And Loulun magnetism can be generated to welding arc plasma, promote welding arc to rotate, change welding arc characteristic,
Influence appearance of weld.
The present invention is further arranged to, and the externally-applied magnetic field device further includes transmission mechanism, and the transmission mechanism includes set
The worm screw that is located on motor shaft, the worm gear being adapted to worm screw and the rotary shaft for fixing worm gear, the rotary shaft front end sleeve
Equipped with engagement shaft, the second gear being meshed with engagement shaft is equipped in front of the worm gear, the second gear is solid by fixing axle
Due in shell, the elevating lever is located at second gear side, and side wall is equipped with the latch being meshed with the second gear.
Using the above structure, the rotation of motor shaft drives worm screw rotation, and worm screw drives worm gear rotation, and worm gear drives rotary shaft
Rotation, rotary shaft drive engagement shaft rotation, and engagement shaft drives second gear rotation, and second gear is mutually nibbled with the latch on elevating lever
It closes, so that elevating lever rises or falls.Magnetic field not only makes rotating motion externally-applied magnetic field device in the welding process, and
And can also change the position of coil opposite piece simultaneously, to study the influence of magnetic field opposite piece position welding quality.It rises
It drops bar and is equipped with latch, can be engaged with second gear and play fixed function.
The present invention is further arranged to, and the rotary shaft extends out to the outside of shell with respect to one end of second gear,
The rotary shaft end is equipped with the convex block for pulling rotary shaft, and the rotary shaft is equipped with the fixation being adapted to worm gear centre bore
, the steel ball for protecting worm gear is embedded in the fixing seat.
Using the above structure, enabling to the lifting of elevating lever can be opened or be closed according to different welding demands
It closes, to meet different welding demands.When needing elevating lever to rise or drop, rotary shaft is pushed by convex block, so that worm and gear
Make its adaptation rotation with merging, so that engagement shaft rotates, since engagement shaft is meshed with the second gear, so engagement shaft band
Dynamic second gear rotation, to drive the liter or drop of elevating lever；When needing to close the liter or drop of elevating lever, pulled by convex block
Rotary shaft separates worm and gear, so that rotary shaft stops operating.When Worm Wheel System is obstructed, it is attached to fixing seat
On steel ball can skid, can protect worm gear prevents from damaging.
The present invention is further arranged to, and is equipped with sliding block with respect to the side of latch on the elevating lever, is equipped in the shell
Sliding slot compatible with sliding block.
Using the above structure, elevating lever can be moved up and down by sliding block along sliding slot more convenient, reduce frictional force.
The present invention is further arranged to, and the bottom end of the elevating lever is equipped with regulating device, and the regulating device includes and liter
The connected link block of drop bar and the horizontal motion bar being plugged on link block, the connecting rod are equipped with and work in the radial direction
The through-hole of lever adaptation.
Using the above structure, coil relatively horizontal orientation can be adjusted into different angles by rotating motion bar,
To cope with different welding Research Requirements.
The present invention is further arranged to, and the motor uses variable speed electric motors, particularly.
Using the above structure, by variable speed electric motors, particularly complete to entirely around axis movement driving, thus it is possible to vary the speed of rotation with
And speed-changing rotation movement is carried out, also so that motor is realized even acceleration or uniformly retarded motion using PLC, is fixed in by screw
The top of shell, there are gaps between first gear and shell, reduce friction.
Beneficial effects of the present invention：Compared to existing arc welding system, the present invention in the welding process, in externally-applied magnetic field
Under the action of device, concussion stirring action can be carried out to molten bath, changed the crystalline condition of welding crystal grain, made crystal grain refinement, make
Crystallization uniformity is improved；Solidification cracking and stomata sensitivity are reduced, improves welding quality comprehensively；And it can be to welding electricity
Arc plasma generates Loulun magnetism, and welding arc is promoted to rotate, and changes welding arc characteristic, influences appearance of weld.Externally-applied magnetic field
Device can be rotated with wrapping gun, and the adjustable speed of rotation of motor can be used for grinding to change the externally-applied magnetic field device speed of rotation
Study carefully in the welding process, the speed of rotation of the externally-applied magnetic field device of rotation is shaken molten bath and the influence of electric arc effect of optimization.
Start power supply unit, coil forms magnetic field, changes the power in magnetic field by changing excitation current size, improves liquid state of molten pool gold
Belong to flow rate, increase flow range, molten wide increases, and fusion penetration can increase with the increase of magnetic field strength, can also be by changing
Become the output frequency of power supply unit to change field frequency to obtain optimal welding effect.It can be according to different welding demands
Height of the magnetic field with respect to welding workpiece, and the angle of adjustment magnetic field relatively horizontal orientation are adjusted, can be used for studying magnetic field opposite
Position and relative angle shake molten bath and the influence of electric arc effect of optimization.This system can individually allow magnetic according to different demands
Field rotates in the welding process, can also carry out upper and lower elevating movement while rotating, more flexible effectively to optimize
Arc Welding Process has broad application prospects.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Fig. 2 is cross-sectional view at the A-A of Fig. 1 in the present invention.
Fig. 3 is left view structural representation of the invention.
Figure label meaning：1- motor；11- first gear；2- welding set；21- welding gun；211- fixes gear；212-
Bearing；22- welding wire；3- externally-applied magnetic field device；31- shell；32- coil；321- connecting rod；33- transmission mechanism；331- worm screw；
332- worm gear；333- rotary shaft；3331- convex block；4- support plate；5- elevating lever；51- latch；52- sliding block；53- sliding slot；6- is solid
Determine block；61- power supply unit；7- engagement shaft；71- second gear；711- fixing axle；8- fixing seat；81- steel ball；9- regulating device；
91- link block；92- motion bar.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiments of the present invention will be described in further detail.Implement below
Example is not intended to limit the scope of the invention for illustrating the present invention.
A kind of arc welding system of adjustable externally-applied magnetic field as shown in Fig. 1 to 2, including motor 1, welding set 2 with
And externally-applied magnetic field device 3, the welding set 2 include welding gun 21 and the welding wire 22 for being plugged in 21 end of welding gun, the welding gun
It is arranged with fixed gear 211 on 21, is equipped with below the fixed gear 211 and covers the bearing 212 on welding gun 21, the additional magnetic
Field device 3 include shell 31 and coil 32, the shell 31 be equipped be adapted to welding gun 21 and section in arc-shaped support
Plate 4, the support plate 4 are equipped with the fixing groove being adapted to bearing 212, and the bearing 212 is fixed on by bolts and nuts
Determine in slot, the motor 1 is located on shell 31, and 1 axis of motor is arranged across shell 31, be arranged on 1 axis of motor with
The first gear 11 that gear 211 engages is fixed, elevating lever 5 is equipped in the shell 31, the coil 32 is equipped with and lifting
The connected connecting rod 321 in 5 bottom end of bar, the coil 32 are located at 21 lower section of welding gun, and the side wall of the shell 31 is equipped with fixed block
6, the fixed block 6 is equipped with the power supply unit 61 for powering to coil 32.
In above structure, externally-applied magnetic field device 3 is adapted to by support plate 4 with welding gun 21, and passes through bolt, nut and bearing
212 phases are fixed, so that externally-applied magnetic field device 3 is connected with welding gun 21.Motor 1 controls the rotation of 1 axis of motor, drives 11 turns of first gear
Dynamic, first gear 11 is meshed with fixed gear 211, so that externally-applied magnetic field device 3 can be rotated around welding gun 21.Support
Plate 4, which is arranged, in the arc-shaped can ensure externally-applied magnetic field device 3 and the more stable combination of welding gun 21.The output of power supply unit 61 terminates
Onto coil 32, an additional magnetic field in the welding process after power supply is opened.Under the influence of a magnetic field, molten bath can be shaken
Stirring action is swung, changes the crystalline condition of welding crystal grain, makes crystal grain refinement, is improved crystallization uniformity；Crystallization is reduced to split
Line and stomata sensitivity, improve welding quality comprehensively；And Loulun magnetism can be generated to welding arc plasma, promote to weld
Electric arc rotation, changes welding arc characteristic, influences appearance of weld.Coil 32 uses plain conductor, can adjust line as desired
The shape of circle 32, the number of turns, turn-to-turn distance is conveniently replaceable, coil 32 using axial symmetry annular, by diameter 1.5mm enameled wire around
It makes, wire turn is uniformly distributed radial and axial, and one layer of heat-barrier material is additionally provided on inner wall conducting wire, temperature when preventing from welding
It is excessively high that conducting wire is had an impact；Power supply unit 61 is the adjustable AC pulse power supply of high frequency, connecting wire coil 32, starting high frequency friendship
The pulse power is flowed, conductive coil 32 forms magnetic field, changes magnetic field strength by changing exciting current size.
In the present embodiment, the externally-applied magnetic field device 3 further includes transmission mechanism 33, and the transmission mechanism 33 includes being set in
Worm screw 331 on 1 axis of motor, the worm gear 332 being adapted to worm screw 331 and the rotary shaft 333 for fixing worm gear 332, it is described
333 front end sleeve of rotary shaft is equipped with engagement shaft 7, is equipped with 71. institute of second gear being meshed with engagement shaft 7 in front of the worm gear 332
It states second gear 71 to be fixed in shell 31 by fixing axle 711, the elevating lever 5 is located at 71 side of second gear, and side wall
It is equipped with the latch 51 being meshed with second gear 71.
Using the above structure, the rotation of 1 axis of motor drives worm screw 331 to rotate, and worm screw 331 drives worm gear 332 to rotate, worm gear
332 drive rotary shaft 333 to rotate, and rotary shaft 333 drives engagement shaft 7 to rotate, and engagement shaft 7 drives second gear 71 to rotate, and second
Gear 71 is meshed with the latch 51 on elevating lever 5, so that elevating lever 5 rises or falls.Externally-applied magnetic field device 3 exists
Magnetic field not only makes rotating motion in welding process, but also can also change the position of 32 opposite piece of coil simultaneously, to study magnetic
The influence of field opposite piece position welding quality.Elevating lever 5 is equipped with latch 51, can engage and be played admittedly with second gear 71
It is set for using.
In the present embodiment, one end of the opposite second gear 71 of the rotary shaft 333 extends out to the outside of shell 31, institute
State 333 end of rotary shaft and be equipped with convex block 3331 for pulling rotary shaft 333, the rotary shaft 333 be equipped with in worm gear 332
The fixing seat 8 of heart hole adaptation, the steel ball 81 for protecting worm gear 332 is embedded in the fixing seat 8.
Using the above structure, enabling to the lifting of elevating lever 5 can be opened or be closed according to different welding demands
It closes, to meet different welding demands.When needing 5 liters of elevating lever or drop, rotary shaft 333 is pushed by convex block 3331, so that
332 worm screw 331 of worm gear makes its adaptation rotation with merging, so that engagement shaft 7 rotates, due to engagement shaft 7 and second gear 71
It is meshed, so engagement shaft 7 drives second gear 71 to rotate, to drive the liter or drop of elevating lever 5；When needing to close elevating lever
When 5 liter or drop, rotary shaft 333 is pulled by convex block 3331,332 worm screw 331 of worm gear is separated, so that rotary shaft 333
It stops operating.When the transmission of 332 worm screw 331 of worm gear is obstructed, the steel ball 81 being attached in fixing seat 8 can skid, and can protect worm gear
332 prevent from damaging.
In the present embodiment, be equipped with sliding block 52 with respect to the side of latch 51 on the elevating lever 5, be equipped in the shell 31 with
The compatible sliding slot 53 of sliding block 52.
Using the above structure, elevating lever 5 can be moved up and down by sliding block 52 along sliding slot 53 more convenient, and reduction rubs
Wipe power.
In the present embodiment, the bottom end of the elevating lever 5 is equipped with regulating device 9, and the regulating device 9 includes and elevating lever 5
Connected link block 91 and the horizontal motion bar 92 being plugged on link block 91, the connecting rod 321 is set in the radial direction
There is the through-hole being adapted to motion bar 92.
Using the above structure, 32 relatively horizontal orientation of coil can be adjusted into different angles by rotating motion bar 92
Degree, to cope with different welding Research Requirements.
In the present embodiment, the motor 1 uses variable speed electric motors, particularly 1.
Using the above structure, by variable speed electric motors, particularly 1 complete to entirely around axis movement driving, thus it is possible to vary the speed of rotation with
And speed-changing rotation movement is carried out, also so that motor 1 is realized even acceleration or uniformly retarded motion using PLC, is fixed by screw
On the top of shell 31, there are gaps between first gear 11 and shell 31, reduce friction.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvements and modifications can also be made, above-mentioned hypothesis these
Improvement and modification also should be regarded as protection scope of the present invention.
Claims (6)
1. a kind of arc welding system of adjustable externally-applied magnetic field, including motor, welding set and externally-applied magnetic field device, described
Welding set includes welding gun and the welding wire for being plugged in welding gun end, it is characterised in that：Fixed gear is arranged on the welding gun,
It is equipped with below the fixed gear and covers the bearing on welding gun, the externally-applied magnetic field device includes shell and coil, described outer
Shell is equipped be adapted to and section is in the support plate of arc-shaped with welding gun, the support plate equipped with fixing groove with bearing adapter,
The bearing is fixed in fixing groove by bolts and nuts, and the motor is set on the shell, and the motor shaft is set across shell
It sets, the first gear engaged with fixed gear is arranged on the motor shaft, is equipped with elevating lever, the coil in the shell
It is equipped with the connecting rod being connected with elevating lever bottom end, the coil is located at below welding gun, and the side wall of the shell, which is equipped with, to be fixed
Block, the fixed block are equipped with for the power supply unit to coil power supply.
2. a kind of arc welding system of adjustable externally-applied magnetic field according to claim 1, it is characterised in that：It is described additional
Magnetic field device further includes transmission mechanism, and the transmission mechanism includes the worm screw being set on motor shaft, the worm gear that is adapted to worm screw
And the rotary shaft for fixed turbine, the rotary shaft front end sleeve are equipped with engagement shaft, the worm gear front is equipped with and engagement shaft
The second gear being meshed, the second gear are fixed in shell by fixing axle, and the elevating lever is located at second gear one
Side, and side wall is equipped with the latch being meshed with the second gear.
3. a kind of arc welding system of adjustable externally-applied magnetic field according to claim 2, it is characterised in that：The rotation
Axis extends out to the outside of shell with respect to one end of second gear, and the rotary shaft end is equipped with for pulling the convex of rotary shaft
Block, the rotary shaft are equipped with the fixing seat being adapted to worm gear centre bore, are embedded in the fixing seat for protecting worm gear
Steel ball.
4. a kind of arc welding system of adjustable externally-applied magnetic field according to claim 2, it is characterised in that：The lifting
It is equipped with sliding block with respect to the side of latch on bar, is equipped with sliding slot compatible with sliding block in the shell.
5. a kind of arc welding system of adjustable externally-applied magnetic field according to claim 4, it is characterised in that：The lifting
The bottom end of bar is equipped with regulating device, and the regulating device includes that the link block being connected with elevating lever and level are plugged in link block
On motion bar, the connecting rod is equipped with the through-hole that is adapted to motion bar in the radial direction.
6. a kind of arc welding system of adjustable externally-applied magnetic field according to claim 1, it is characterised in that：The motor
Using variable speed electric motors, particularly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810648710.3A CN108856973B (en) | 2018-06-14 | 2018-06-14 | Electric arc welding system capable of adjusting external magnetic field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810648710.3A CN108856973B (en) | 2018-06-14 | 2018-06-14 | Electric arc welding system capable of adjusting external magnetic field |
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| Publication Number | Publication Date |
|---|---|
| CN108856973A true CN108856973A (en) | 2018-11-23 |
| CN108856973B CN108856973B (en) | 2020-12-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810648710.3A Active CN108856973B (en) | 2018-06-14 | 2018-06-14 | Electric arc welding system capable of adjusting external magnetic field |
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Cited By (5)
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| CN109530864A (en) * | 2019-01-03 | 2019-03-29 | 湘潭大学 | A kind of weld seam tracking sensor with magnetic field control TIG electric arc |
| 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 |
| CN110744171A (en) * | 2019-11-28 | 2020-02-04 | 湖北文理学院 | Automatic welding equipment and method with external magnetic field |
| CN113459508A (en) * | 2021-07-08 | 2021-10-01 | 杭州电子科技大学 | Multichannel converging type biological printing nozzle |
| CN115673492A (en) * | 2022-11-22 | 2023-02-03 | 吉林大学 | Aluminum alloy magnetic field assisted CMT arc additive manufacturing device and method |
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| CN110744171A (en) * | 2019-11-28 | 2020-02-04 | 湖北文理学院 | Automatic welding equipment and method with external magnetic field |
| CN110744171B (en) * | 2019-11-28 | 2024-05-14 | 湖北文理学院 | Automatic welding equipment and method for externally applied magnetic field |
| CN113459508A (en) * | 2021-07-08 | 2021-10-01 | 杭州电子科技大学 | Multichannel converging type biological printing nozzle |
| CN113459508B (en) * | 2021-07-08 | 2023-03-10 | 杭州电子科技大学 | Multichannel converging type biological printing nozzle |
| CN115673492A (en) * | 2022-11-22 | 2023-02-03 | 吉林大学 | Aluminum alloy magnetic field assisted CMT arc additive manufacturing device and method |
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