CN114535749A - Multi-angle self-adjustment wire feeding device based on double-wire GTAW electric arc additive manufacturing - Google Patents
Multi-angle self-adjustment wire feeding device based on double-wire GTAW electric arc additive manufacturing Download PDFInfo
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- CN114535749A CN114535749A CN202210171168.3A CN202210171168A CN114535749A CN 114535749 A CN114535749 A CN 114535749A CN 202210171168 A CN202210171168 A CN 202210171168A CN 114535749 A CN114535749 A CN 114535749A
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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
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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
- B23K9/095—Monitoring or automatic control of welding parameters
- B23K9/0956—Monitoring or automatic control of welding parameters using sensing means, e.g. optical
-
- 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
- B23K9/12—Automatic feeding or moving of electrodes or work for spot or seam welding or cutting
- B23K9/133—Means for feeding electrodes, e.g. drums, rolls, motors
-
- 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
- B23K9/173—Arc welding or cutting making use of shielding gas and of a consumable electrode
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Welding Or Cutting Using Electron Beams (AREA)
Abstract
The invention discloses a multi-angle self-adjusting wire feeding device based on double-wire GTAW electric arc additive manufacturing. The wire feeding device not only can adjust the clamping degree between the two wire feeding nozzles, but also can identify the surface of a welding seam through a laser vision system in the additive manufacturing process, improve the wire feeding speed at the concave part of the surface, reduce the wire feeding speed at the convex part of the surface so as to achieve the leveling of a deposition layer, contribute to realizing the additive manufacturing appearance of an electric arc, and provide guarantee for the quality of additive manufacturing.
Description
The technical field is as follows:
the invention relates to the field of wire feeding clamps for GTAW electric arc additive manufacturing, in particular to a double-wire GTAW electric arc additive manufacturing wire feeding device which can adjust the angle between wire feeding nozzles and realize the smoothness of the surface appearance of an additive component through feedback adjustment.
Background
The electric arc additive manufacturing technology is a novel forming technology which takes electric arc heat and resistance heat as composite heat sources, melts metal raw materials, and accumulates parts with certain shapes and sizes layer by layer through a small molten pool and a micro-metallurgy rapid solidification technology to realize high-density and high-performance components. Compared with the laser and electron beam additive manufacturing technology, the electric arc additive manufacturing has high deposition rate, low manufacturing cost and insensitivity to metal materials, thereby receiving high attention at home and abroad.
The electric arc additive manufacturing is divided into consumable electrode electric arc additive manufacturing (such as GMAW) and non-consumable electrode electric arc additive manufacturing. Argon tungsten arc welding (GTAW) additive manufacturing belongs to non-consumable electrode electric arc additive manufacturing, and compared with consumable electrode electric arc additive manufacturing, the method has the advantages of stable molten pool, small splashing and the like. And the double-wire GTAW arc additive manufacturing can realize the simultaneous delivery of two metals into a molten pool, and provides a brand-new and feasible method for manufacturing the gradient functional material. For twin wire GTAW arc additive manufacturing, the angle between the two wire feed tips is also a process parameter that affects the quality of the deposited layer. However, most of the existing double wire feeding holding equipment cannot adjust the included angle between the two wire feeding nozzles.
In the prior art, application publication No. CN 105904065 a discloses an adjustable two-way TIG automatic welding fixture that send a angle, including installation pole, clamp, flexible guiding mechanism, flexible fixing base, angle adjustment mechanism, the clamp with installation pole fixed connection, welder can adorn and press from both sides in the clamp. The wire feeding angle adjusting device adopts a symmetrical wire feeding mode, can perform bidirectional welding, solves the problem that the prior art only has low unidirectional welding efficiency, and has accurate and reliable wire feeding angle adjustment and high operation stability. However, in the operation process of the clamp, manual adjustment needs to be performed, for example, the adjusting screw needs to be manually screwed to adjust the relative distance between the first adjusting seat and the second adjusting seat, so as to perform telescopic adjustment of the telescopic fixed seat relative to the vertical distance of the clamp; in addition, in the adjustment of the angle adjusting mechanism, the position of the first pull rod relative to the first pin shaft and the position of the second pull rod relative to the second pin shaft need to be adjusted by screwing the nut, so as to adjust the arrangement angles of the first angle adjusting rod and the second angle adjusting rod. Above-mentioned scheme needs manual regulation, and is not intelligent enough, especially when welding to different materials or object, manual operation can be relatively frequent, increases the manual operation volume, and simultaneously, whether the angle that obtains of regulation is suitable not just once can accurately be adjusted and obtain, need confirm repeatedly, and what is the situation it still has two angle adjustment mechanism, and the angle that needs to guarantee two angle adjustment mechanism is all the same and is fit for current welding condition, and the requirement is higher relatively.
Application publication No. CN 113333917A discloses a bidirectional TIG automatic welding fixture capable of adjusting a wire feeding angle, which comprises two wire feeding rods respectively arranged in two directions of a welding path, and a bracket for erecting the two wire feeding rods, wherein the bracket is fixed on welding equipment; the bracket comprises an upper bracket rod, a lower bracket rod, upper electric cylinders respectively arranged at two distal ends of the upper bracket rod and lower electric cylinders respectively arranged at two distal ends of the lower bracket rod, connecting rods are respectively hinged at the middle parts of two sides of the upper bracket rod, and the lower ends of the connecting rods are respectively hinged with the upper ends of the wire feeding rods at the same side; in addition, the connecting rod and the upper surface of sending a pole all are equipped with the slide rail, go up the end of electric cylinder and lower electric cylinder's piston rod and articulate respectively has a slider, and the slider that goes up electric cylinder and connect is connected with the slide rail cooperation on the connecting rod, and the slider that lower electric cylinder connects is connected with the slide rail on sending a pole to the angle of sending the lead screw is adjusted under last electric cylinder and the combined action of lower electric cylinder. However, the wire feeding nozzles on the two sides of the welding mechanism are respectively positioned on the left side and the right side of the welding gun, the horizontal included angle of the two wire feeding nozzles cannot be adjusted, GTAW is a welding mode which is very sensitive to the feeding angle of a welding wire, and the welding wire is often fed from the front end of a molten pool during manual GTAW. Therefore, the horizontal included angle of the two wire feeding mouths cannot be adjusted, so that the material adding quantity is influenced.
In addition, for arc additive manufacturing, the influence of the surface topography on the quality of an additive component is very large, because the surface of each deposited layer manufactured through additive manufacturing is uneven and has great influence on the subsequent additive manufacturing process. The angle and distance of the wire to the surface can be affected. In the current technology, the height and angle of the wire feeding nozzle and the wire feeding speed are adjusted manually after each additive manufacturing process, and then the additive manufacturing process is performed on the next additive manufacturing process. The wire feeding equipment at present can not realize the real-time adjustment of the wire feeding speed according to the surface appearance in the primary material increase process.
In summary, most of the currently adopted twin-wire GTAW additive manufacturing wire feeding devices cannot horizontally adjust the horizontal included angle between the two wire feeding nozzles.
Disclosure of Invention
The purpose of the invention is as follows: the invention provides a double-wire GTAW additive manufacturing wire feeding device which can adjust an included angle between two wire feeding nozzles, can identify the surface of a welding seam through a laser vision system in an additive manufacturing process, improves the wire feeding speed at a concave part of the surface, reduces the wire feeding speed at a convex part of the surface so as to achieve the smoothness of a deposition layer, is beneficial to realizing the appearance of electric arc additive manufacturing, and provides guarantee for the quality of additive manufacturing.
The technical scheme adopted by the invention is as follows: the utility model provides a multi-angle self-interacting wire drive feed unit based on two silk GTAW electric arc vibration material disk, its characterized in that: the device comprises a circular guide rail, a cross rod, a fixed pin, a vertical rod, a first synchronous wheel, a synchronous belt, a second synchronous wheel, a stepping motor, a wire feeding nozzle, a laser vision system, a GTAW welding gun, a guide rod and a control system;
a circular guide rail is fixed on the periphery of the GTAW welding gun, two cross rods are connected to the circular guide rail, and the cross rods are kept fixed through fixing pins;
a first synchronizing wheel and a second synchronizing wheel are arranged in the groove of the cross rod, a synchronous belt is arranged in the first synchronizing wheel and the second synchronizing wheel and is connected with a stepping motor for controlling the movement of the synchronous belt; the guide rod is arranged on the cross rod, the upper end of the vertical rod is connected with the guide rod, the lower end of the vertical rod is connected with the wire feeding nozzle, the vertical rod is connected with the synchronous belt, and the vertical rod is a telescopic rod;
the horizontal included angles of the wire feeding nozzles on the two sides are adjusted through one end of a cross rod in the sliding circular guide rail, and the angle is fixed through a fixing pin; the first synchronizing wheel and the second synchronizing wheel drive a synchronous belt to transmit to realize the movement of the wire feeding nozzle in the transverse direction, and the telescopic rod in the vertical rod realizes the movement of the wire feeding nozzle in the vertical direction;
the laser vision system comprises a laser vision sensor which is fixed on a welding gun and connected with wire feeding motors, and welding wires of the two wire feeding nozzles are respectively pushed independently through the two wire feeding motors;
the control system comprises a PLC controller, and the PLC controller is respectively connected with the stepping motor, the motor in the vertical rod and the wire feeding motor;
when adjusting send the angle of silk mouth and horizontal plane, send the most advanced of silk mouth and tungsten utmost point position static relatively, through horizontal pole, montant and send the synchronous motion of silk mouth for send silk mouth angle to change, through laser vision system carries out visual treatment to the sedimentary deposit surface, analysis surface morphology, and with signal transmission to the PLC controller increases or reduces wire feed speed, thereby makes the sedimentary deposit surfacing.
Preferably, a plurality of small holes are uniformly formed in the circular guide rail, and the fixing pins fix the cross rod on the circular guide rail through the small holes.
Preferably, the included angle between the adjacent small holes on the circular guide rail and the circle center is 15 degrees.
Preferably, the cross section of the telescopic rod of the vertical rod is square instead of circular, so that the relative rotation of the inner rod of the telescopic rod caused by unstable fixation can be avoided.
Preferably, the horizontal included angle between the two wire feeding mouths is controlled to be 60-75 degrees.
A double-sided wire-feed GTAW additive manufacturing method, comprising the steps of:
the left and right cross bars are firstly rotated to the required positions and then fixed by fixing pins.
After the material adding program is set, the position of the welding gun is controlled to reach the expected position, and the position of the wire feeding nozzle and the angle between the wire feeding nozzle and the welding gun can be adjusted by operating the PLC control system.
When the angle of the filament feeding nozzle is adjusted, the relative position of the tip of the filament feeding nozzle and the tungsten electrode is kept unchanged, and the filament feeding nozzle and the tungsten electrode are guaranteed to be relatively static through synchronous movement of the filament feeding nozzle, the cross rod and the vertical rod, so that the problem that the precision of the filament feeding nozzle is influenced due to interference of a mechanism caused by misoperation during adjustment is avoided.
When the material increase begins, the welding machine starts to transmit an arc starting signal, the wire feeding motor starts to feed wires, the control system sends out a signal, the visual sensor starts to work, the surface is detected, if the surface is raised or sunken, the signal is transmitted to the PLC, then the wire feeding speed is increased or reduced according to actual conditions, and a formed deposition layer is smooth.
The beneficial effects of the invention are as follows:
1. the double-side wire feeding GTAW additive manufacturing wire feeding device can enable welding wires at two sides to enter a molten pool from the front end of the molten pool, so that good morphology and performance of a deposition layer are realized. Different wire feeding devices are mutually independent, welding wires made of different materials can be used on two sides of the wire feeding devices, and component control in the electric arc additive manufacturing process can be realized by controlling the feeding speed and the wire feeding position of different wires, so that electric arc additive of a gradient functional material is realized;
2. according to the double-side wire feeding GTAW additive manufacturing wire feeding device, the surface appearance is detected through the laser vision sensor, the surface appearance is transmitted to the PLC through signals, and the deposited layer is attractive in appearance and excellent in performance by controlling the wire feeding speed.
Drawings
FIG. 1 is a schematic perspective view of a wire feeding device according to the present invention;
FIG. 2 is a schematic front view of a wire feeder according to the present invention;
FIG. 3 is a schematic diagram of the operation of the wire feeder of the present invention;
FIG. 4 is a schematic diagram of the operation of the feedback system;
figure 1-circular guide rail; 2-a cross bar; 3-a fixing pin; 4-vertical rod; 5-a first synchronizing wheel; 6-synchronous belt; 7-a second synchronizing wheel; 8-a step motor; 9-a wire feeding mouth; 10-laser vision system; 11-GTAW torch; 12-guide bar.
The specific implementation mode is as follows:
the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
As shown in figures 1-4, the multi-angle self-adjusting wire feeder based on the double-wire GTAW electric arc additive manufacturing comprises a circular guide rail 1 fastened on a GTAW welding gun 11 and a bracket for erecting two wire feeding nozzles 9, wherein the bracket comprises a cross rod 2 and a vertical rod 4. The cross bar 2 is also provided with a fixed pin 3 and a guide rod 12.
The mechanism also comprises a belt transmission system, the transmission system comprises a first synchronizing wheel 5 and a second synchronizing wheel 7 in the cross bar 1 and a synchronizing belt 6 therein, and the stepping motor 8 controls the rotation of the synchronizing wheels to drive the synchronizing belt 6 to move.
In addition, the laser vision system 10 and the control system are also included, and the control system includes a PLC controller, which may be any commercially available product capable of individually controlling a plurality of objects. The PLC controller is respectively connected with synchronous belt pulleys and motors in the transverse rods 5 and the vertical rods 6, and the wire feeding nozzles 9 are controlled by the PLC controller to drive the synchronous belts to stretch and retract with the vertical rods so as to move horizontally and vertically. In addition, the motor and a transmission shaft in the wire feeding nozzle 9 are adjusted through a PLC controller so as to adjust the angle between the wire feeding nozzle 9 and a tungsten electrode.
According to the invention, the vertical rod reciprocates in the horizontal direction through the motion of the synchronous belt, so that the left and right movement of the wire feeding nozzle is controlled; meanwhile, the motor controls the vertical rod to stretch and move in the vertical direction, so that the wire feeding nozzle is controlled to move in the vertical direction; the angle between the wire feeding nozzle and the tungsten electrode can be controlled by controlling the transmission shaft.
The method for additive manufacturing by using the GTAW additive device with the bidirectional wire feeding comprises the following steps:
before material addition, firstly, adjusting a horizontal included angle between two wire feeding nozzles to be about 60 degrees, and presetting the positions of the wire feeding nozzles and the angle between the wire feeding nozzles and a tungsten electrode through a PLC (programmable logic controller) so as to enable the wire feeding nozzles to be in a better position;
when the material increase operation starts, the power supply is switched on, the welding direction is controlled according to the program requirement, after the welding machine transmits an arc starting signal, the wire feeding motor starts to operate, the two sides start to synchronously feed wires, the laser vision sensor starts to operate, and the laser vision sensor also starts to detect the surface appearance along with the movement of the welding gun to the material increase direction;
the position and the angle of the wire feeding nozzle can be detected by the laser sensor in the material increase process, the surface condition is subjected to data processing, the adjustment required is transmitted to the PLC, the wire feeding speed is automatically adjusted, manual operation is not needed, and the accuracy and the automation degree are higher because the adjustment is carried out according to the real-time appearance of the surface of a welding seam;
when welding wire materials on two sides are the same, deposition efficiency of additive manufacturing can be improved by wire feeding on two sides, and therefore the defect that GTAW additive manufacturing efficiency is low is overcome; when the welding wire materials on the two sides are different, the gradient functional material can be manufactured by wire feeding on the two sides;
the wire feeding device is simple in structure, can realize wire feeding on both sides in GTAW electric arc additive manufacturing, and can adjust the included angle between the wire feeding nozzles on both sides. In addition, the surface can be identified through a laser vision detection system in the material increase process, so that the wire feeding speed is correspondingly adjusted, the surface of the deposition layer is relatively flat, and the smooth and attractive deposition layer can be manufactured.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (5)
1. The utility model provides a multi-angle self-interacting wire drive feed unit based on two silk GTAW electric arc vibration material disk, its characterized in that: the device comprises a circular guide rail (1), a cross rod (2), a fixing pin (3), a vertical rod (4), a first synchronous wheel (5), a synchronous belt (6), a second synchronous wheel (7), a stepping motor (8), a wire feeding nozzle (9), a laser vision system (10), a GTAW welding gun (11), a guide rod (12) and a control system;
a circular guide rail (1) is fixed on the periphery of the GTAW welding gun (11), two cross rods (2) are connected to the circular guide rail (1), and the cross rods (2) are kept fixed through fixing pins (3);
a first synchronizing wheel (5) and a second synchronizing wheel (7) are arranged in a groove of the cross rod (2), a synchronous belt (6) is arranged in the first synchronizing wheel (5) and the second synchronizing wheel (7), and the synchronous belt (6) is connected with a stepping motor (8) for controlling the movement of the synchronous belt; the guide rod (12) is installed on the cross rod (2), the upper end of the vertical rod (4) is connected with the guide rod (12), the lower end of the vertical rod (4) is connected with the wire feeding nozzle (9), the vertical rod (4) is connected with the synchronous belt (6), and the vertical rod (4) is a telescopic rod;
the horizontal included angle between the wire feeding nozzles (9) on the two sides is adjusted through one end of a cross rod (2) in the sliding circular guide rail (1), and the angle is fixed through a fixing pin (3); the first synchronous wheel (5) and the second synchronous wheel (7) drive the synchronous belt (6) to transmit to realize the movement of the wire feeding nozzle (9) in the transverse direction, and the telescopic rod in the vertical rod (4) realizes the movement of the wire feeding nozzle (9) in the vertical direction;
the laser vision system (10) comprises a laser vision sensor which is fixed on a welding gun and connected with wire feeding motors, and welding wires of the two wire feeding nozzles (9) are respectively pushed independently through the two wire feeding motors;
the control system comprises a PLC controller, and the PLC controller is respectively connected with the stepping motor (8), the motor in the vertical rod (4) and the wire feeding motor;
when adjusting send the angle of silk mouth (9) and horizontal plane, send the most advanced of silk mouth (9) and tungsten utmost point position static relatively, through horizontal pole (2), montant (4) and send the simultaneous movement of silk mouth (9) for send silk mouth (9) angle to change, through laser vision system (10) carry out visual processing to the sedimentary deposit surface, analysis surface morphology, and with signal transmission to the PLC controller, increase or reduce and send a speed, thereby make the sedimentary deposit surface level.
2. The multi-angle self-adjusting wire feeder based on twin-wire GTAW arc additive manufacturing of claim 1, wherein: a plurality of small holes are uniformly formed in the circular guide rail (1), and the fixing pins fix the cross rods on the circular guide rail (1) through the small holes.
3. The multi-angle self-adjusting wire feeder based on twin-wire GTAW arc additive manufacturing of claim 1, wherein: the included angle between the adjacent small holes on the circular guide rail (1) and the circle center is 15 degrees.
4. The multi-angle self-adjusting wire feeder based on twin-wire GTAW arc additive manufacturing of claim 1, wherein: the cross section of the telescopic rod of the vertical rod (4) is square.
5. The multi-angle self-adjusting wire feeder based on twin-wire GTAW arc additive manufacturing of claim 1, wherein: the horizontal included angle between the two wire feeding nozzles (9) is controlled to be 60-75 degrees.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210171168.3A CN114535749A (en) | 2022-02-24 | 2022-02-24 | Multi-angle self-adjustment wire feeding device based on double-wire GTAW electric arc additive manufacturing |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210171168.3A CN114535749A (en) | 2022-02-24 | 2022-02-24 | Multi-angle self-adjustment wire feeding device based on double-wire GTAW electric arc additive manufacturing |
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| CN114535749A true CN114535749A (en) | 2022-05-27 |
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| JP2005095953A (en) * | 2003-09-26 | 2005-04-14 | Mitsubishi Heavy Ind Ltd | Tig welding method and device |
| CN205927450U (en) * | 2016-06-26 | 2017-02-08 | 何强 | Multi -functional threaded fastener's welding equipment |
| CN207593019U (en) * | 2017-09-11 | 2018-07-10 | 江苏阿斯美特精工科技有限公司 | A kind of adjustable more wire feeders in position |
| CN110421231A (en) * | 2019-09-06 | 2019-11-08 | 广东省焊接技术研究所（广东省中乌研究院） | Paraxonic wire feeder and increasing material manufacturing system |
| CN113263243A (en) * | 2021-05-08 | 2021-08-17 | 南京航空航天大学 | Device and method for measuring and feeding back flatness of variable cross-section component in real time in electric arc additive manufacturing process |
| CN113333910A (en) * | 2021-05-08 | 2021-09-03 | 南京航空航天大学 | Intelligent material increase device and method based on rotating multi-wire electric arc |
-
2022
- 2022-02-24 CN CN202210171168.3A patent/CN114535749A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005095953A (en) * | 2003-09-26 | 2005-04-14 | Mitsubishi Heavy Ind Ltd | Tig welding method and device |
| CN205927450U (en) * | 2016-06-26 | 2017-02-08 | 何强 | Multi -functional threaded fastener's welding equipment |
| CN207593019U (en) * | 2017-09-11 | 2018-07-10 | 江苏阿斯美特精工科技有限公司 | A kind of adjustable more wire feeders in position |
| CN110421231A (en) * | 2019-09-06 | 2019-11-08 | 广东省焊接技术研究所（广东省中乌研究院） | Paraxonic wire feeder and increasing material manufacturing system |
| CN113263243A (en) * | 2021-05-08 | 2021-08-17 | 南京航空航天大学 | Device and method for measuring and feeding back flatness of variable cross-section component in real time in electric arc additive manufacturing process |
| CN113333910A (en) * | 2021-05-08 | 2021-09-03 | 南京航空航天大学 | Intelligent material increase device and method based on rotating multi-wire electric arc |
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