阅读说明：本技术 水陆两用原位电弧增材制造设备及方法 (Amphibious in-situ electric arc additive manufacturing equipment and method ) 是由 王振民 钟启明 徐孟嘉 张芩 于 2019-08-28 设计创作，主要内容包括：本发明提供了一种水陆两用原位电弧增材制造设备,其特征在于：包括宽禁带增材电源、潜水送丝机、焊炬、保护装置、机器人、压缩气装置和保护气装置；所述焊炬与机器人连接,以实现机器人带动焊炬移动进行电弧增材操作；所述宽禁带增材电源、潜水送丝机和焊炬依次连接；所述潜水送丝机还与保护气装置连接；所述宽禁带增材电源分别与压缩气装置和保护气装置连接,以实现压缩气装置和保护气装置的打开和关闭。该设备可实现水陆两用,可形成高挺度高速气幕以形成局部干燥空间,便于获取焊丝与母材之间距离,可提高电弧增材制造工艺质量。本发明还提供一种上述设备的电弧增材制造方法,该方法可实现电弧增材自动化操作。(The invention provides amphibious in-situ electric arc additive manufacturing equipment which is characterized in that: the device comprises a wide forbidden band additive power supply, a diving wire feeder, a welding torch, a protection device, a robot, a compressed gas device and a protection gas device; the welding torch is connected with the robot so as to realize that the robot drives the welding torch to move to perform electric arc material increase operation; the wide forbidden band additive power supply, the submersible wire feeder and the welding torch are sequentially connected; the submersible wire feeder is also connected with a protective gas device; the wide forbidden band additive power supply is respectively connected with the compressed gas device and the protective gas device so as to realize the opening and closing of the compressed gas device and the protective gas device. The device can realize amphibious use, can form a high-stiffness high-speed air curtain to form a local drying space, is convenient to obtain the distance between a welding wire and a base metal, and can improve the quality of an electric arc additive manufacturing process. The invention also provides an electric arc additive manufacturing method of the equipment, which can realize automatic electric arc additive operation.)

1. An amphibious in-situ arc additive manufacturing device is characterized in that: the device comprises a wide forbidden band additive power supply, a diving wire feeder, a welding torch, a protection device, a robot, a compressed gas device and a protection gas device;

the welding torch is connected with the robot so as to realize that the robot drives the welding torch to move to perform electric arc material increase operation; the wide forbidden band additive power supply, the submersible wire feeder and the welding torch are sequentially connected; the submersible wire feeder is also connected with a protective gas device; the wide forbidden band additive power supply is respectively connected with the compressed gas device and the protective gas device so as to realize the opening and closing of the compressed gas device and the protective gas device;

the protection device comprises an inner cylinder and an outer cover which are sleeved inside and outside; the inner cylinder forms an inner through hole; the top of the inner through hole is connected with the end part of the welding torch through threads; an interlayer convergence cavity with a downward opening and a convergence shape is formed between the outer cover and the inner cylinder; the wall of the interlayer convergence cavity is provided with a spiral structure; the outer cover is connected with at least one air inlet pipe; the compressed gas device is communicated with the interlayer convergence cavity through a gas inlet pipe.

2. The amphibious in-situ arc additive manufacturing apparatus of claim 1, wherein: the spiral structure comprises spiral line convex patterns arranged along the inner wall of the outer cover and spiral bulges arranged around the outer wall of the inner cylinder.

3. The amphibious in-situ arc additive manufacturing apparatus of claim 1, wherein: one end of the welding torch, which is far away from the protection device, is fixed on a sealing cover of the diving wire feeder, so that a welding wire output by the diving wire feeder extends into the inner through hole through the welding torch; the sealing cover of the diving wire feeder is also connected with the protective gas device, so that the protective gas output by the protective gas device flows into the inner through hole through the diving wire feeder and the welding torch.

4. The amphibious in-situ arc additive manufacturing apparatus of claim 1, wherein: the number of the air inlet pipes is more than two; each air inlet pipe is respectively connected with the outer cover; each air inlet pipe is tangent to the interlayer convergence cavity respectively, so that compressed air enters the interlayer convergence cavity to form rotary airflow.

5. The amphibious in-situ arc additive manufacturing apparatus of claim 1, wherein: the device also comprises a vision sensor used for acquiring the distance between the welding wire and the base metal; the vision sensor is arranged on the robot and is in signal connection with the robot.

6. The amphibious in-situ arc additive manufacturing apparatus of claim 1, wherein: the wide bandgap additive power supply comprises a main circuit and a control circuit;

the main circuit comprises an input rectification filter circuit, a wide-bandgap full-bridge inverter circuit, a high-frequency transformer and a wide-bandgap full-wave rectification filter circuit which are sequentially connected; the input rectification filter circuit is connected with three-phase power frequency alternating current, and the full-wave rectification filter circuit is connected with the material increase arc load.

7. The amphibious in-situ arc additive manufacturing apparatus of claim 6, wherein: the wide-bandgap full-bridge inverter circuit is formed by connecting wide-bandgap semiconductor power switching tubes into a full-bridge topology structure; the wide bandgap semiconductor power switch tube is a SiC MOSFET or SiC IGBT or GaN power device;

the wide-bandgap full-wave rectification filter circuit is formed by connecting a wide-bandgap Schottky diode and an output filter reactor into a full-wave rectification filter topological structure; the wide bandgap schottky diode is referred to as a SiC schottky diode or a GaN schottky diode.

8. The amphibious in-situ arc additive manufacturing apparatus of claim 6, wherein: the control circuit comprises a power supply circuit, a microprocessor, a wide bandgap device high-frequency driving circuit, a sampling feedback circuit and a switching signal control circuit, wherein the power supply circuit is connected with three-phase power frequency alternating current and used for supplying power;

the wide bandgap device high-frequency drive circuit is connected with a wide bandgap full-bridge inverter circuit of the main circuit; the sampling feedback circuit is connected with the wide-bandgap full-wave rectification filter circuit; and the switch signal control circuit is connected with the compressed gas device and the protective gas device respectively.

9. The amphibious in-situ arc additive manufacturing apparatus of claim 8, wherein: the switching signal control circuit comprises a Darlington transistor array driving chip ULN1 and two driving units; the two driving units respectively comprise a high-speed optical coupler U1, an MOS tube M1 and a diode D1;

the power supply circuit is provided with a first power supply and a second power supply, and the power supply voltage of the first power supply is less than or equal to that of the second power supply; the input end of the Darlington transistor array driving chip ULN1 is connected with the microprocessor; the input end of the high-speed optical coupler U1 is respectively connected with the first power supply and the output end of the Darlington transistor array driving chip ULN 1; the first output end of the high-speed optical coupler U1 is connected with the second power supply; the output end II of the high-speed optical coupler U1 is connected with the grid electrode of the MOS tube M1 through a resistor R3 and a resistor R5 which are connected in series; the junction of the resistor R3 and the resistor R5 is connected with the source electrode of the MOS transistor M1 through a resistor R6, and the source electrode of the MOS transistor M1 is grounded; the drain electrode of the MOS transistor M1 is connected with the anode of the diode D1, and the cathode of the diode D1 is connected with the second power supply; a capacitor C1 is connected between the first output end of the high-speed optical coupler U1 and the second output end of the high-speed optical coupler U1; and the second power supply and the drain electrode of the MOS transistor M1 are used as the output end of the switching signal control circuit together.

10. The arc additive manufacturing method of the amphibious in-situ arc additive manufacturing apparatus of claim 1, wherein: the method comprises the following steps:

s1, the robot receives the additive model information, divides the additive model into a plurality of additive layers, and sets the manufacturing track, the power supply parameter, the wire feeding parameter, the advanced air feeding time and the delayed air feeding time of each additive layer; the power supply parameters include power supply current and voltage; the wire feeding parameters comprise wire feeding speed and wire feeding mode; setting an electric arc additive manufacturing occasion; setting the first additive layer as a current additive layer;

s2, moving the robot to the initial position of the manufacturing track of the current additive layer, and adjusting the distance from the welding torch to the parent metal to enable a protection device at the front end of the welding torch to be close to and attached to the parent metal;

s3, the robot sends the power supply parameters, the advanced air supply time and the delayed air supply time of the current additive layer to the wide forbidden band additive power supply, and sends the wire feeding parameters of the current additive layer to the diving wire feeder;

s4, judging the occasion of arc additive manufacturing by the robot:

if the underwater situation is the underwater situation, the robot sends an underwater operation signal to the wide-bandgap material-increasing power supply, the wide-bandgap material-increasing power supply opens the compressed air device, so that the compressed air discharges water in the interlayer convergence cavity of the protection device and forms a high-stiffness high-speed air curtain to create a local drying area for underwater electric arc material increasing manufacturing, and then the step is skipped to the step S5;

if the underwater situation is not the underwater situation, directly jumping to the step S5;

s5, turning on a protective gas device by a wide forbidden band additive power supply, and conveying the protective gas to a contact nozzle of a welding torch through a submersible wire feeder to form additive gas protective atmosphere; counting down the air supply time in advance;

s6, after the air supply time is finished in advance, the wide forbidden band additive material power supply continues to turn on the protective gas device; the submerged wire feeder is matched with a wide forbidden band additive power supply to carry out no-load slow wire feeding and arcing until the arcing is successful; then, after the robot receives an arc starting success signal sent by the wide-bandgap additive power supply, the robot moves according to the manufacturing track of the current additive layer, the wide-bandgap additive power supply outputs arc energy, and the submersible wire feeder feeds welding wires according to wire feeding parameters until the manufacturing track end point of the current additive layer is reached;

s7, stopping the output of arc energy by the wide-forbidden-band additive power supply, and stopping the welding wire feeding by the submerged wire feeder; counting down the lag air supply time; after the lag air supply time is over, the wide forbidden band additive power supply closes the protective gas device and the compressed gas device to complete the current additive layer accumulation;

s8, judging whether the current additive layer is the last additive layer: if so, finishing the additive forming; otherwise, the next additive layer stacking is carried out by jumping to S2.

Technical Field

The invention relates to the technical field of electric arc additive manufacturing, in particular to amphibious in-situ electric arc additive manufacturing equipment and a method.

Background

The electric arc additive manufacturing has the characteristics of low equipment cost, high material utilization rate, wide structural size adaptability and the like, has the advantages of flexibility and individuation compared with the traditional manufacturing technology, and has wide application prospects in the fields of ocean resource development, ocean engineering construction, ship equipment design and manufacture, emergency repair and the like.

According to different operation positions, the electric arc additive manufacturing applied to the field of maritime work can be divided into electric arc additive manufacturing above a waterline and underwater electric arc additive manufacturing. The electric arc additive manufacturing above the waterline is similar to the conventional land additive manufacturing working condition, and land equipment can be directly applied; the underwater electric arc additive manufacturing is subject to the marine environment, the stability of the electric arc is obviously affected by complex underwater working conditions, the consistency of a forming process and a process effect is further determined, and the underwater electric arc additive manufacturing has higher requirements on a power supply for controlling electric arc energy, related equipment and the like.

Underwater arc additive manufacturing can be divided into three types, namely a wet method, a dry method and a local dry method. The wet method only carries out self-protection underwater operation through the flux-cored wire without drainage measures, the equipment is simple and economical, but the forming quality is poor and the like; the dry method uses the pressure container to isolate and drain the area to be welded, so that the electric arc combustion environment is close to the working condition of land operation, thereby having the advantage of high molding quality, but the matched equipment has high cost, long construction period and low efficiency; the local dry method uses the drainage device to drain water locally, so that the processing area is in a relatively dry environment, the supporting equipment is simple, the station adaptability is wide, and the forming quality is good.

The underwater local dry method integrates the advantages of the wet method and the dry method, is a preferable method for underwater electric arc additive manufacturing, and adopts local drainage measures to enable the underwater electric arc additive manufacturing to have operability of being applied to additive manufacturing operation above a waterline.

At present, the electric arc additive manufacturing equipment applied to the aforementioned fields such as ocean engineering still has the following defects:

the equipment has single function and is difficult or impossible to carry out amphibious; and the power supply is a general land Si-based welding power supply, the performance is mediocre, the power density is low, and the arc energy control is extensive. For example, the invention of Chinese patent application "underwater electric arc additive manufacturing equipment" (publication number: CN 108161173A), the equipment is characterized in that a waterproof component is utilized to form a local drying area and a restraining component is adopted to restrain the flow of molten metal, although the equipment can improve the forming quality of an underwater electric arc additive structural component, the equipment adopts a very complicated waterproof component and a restraining component, and amphibious use is difficult to realize; and the device does not optimize the power supply adopted by the underwater electric arc additive.

The method for forming the local drying area by utilizing the micro-drainage cover is an ideal solution, for example, the invention patent application of China (double airflow structure local dry method underwater robot welding micro-drainage cover) (publication number: CN 106624258A) is adopted, the micro-drainage cover comprises an inner air cover, an outer air cover and a water blocking sleeve, a convergent nozzle cavity is formed between the inner air cover and the outer air cover, and compressed gas is injected to form a high-pressure air curtain after passing through the convergent nozzle cavity, so that the local drying area is formed; the water retaining sleeve protects the welding area, so that the influence of external water flow on the welding area is reduced, and the failure of the air curtain caused by impact of the external water flow on the air curtain is avoided; however, the water retaining sleeve shields the welding wire and is not beneficial to manual observation or visual induction to obtain the distance between the welding wire and the base metal, so that the processing effect is influenced.

Disclosure of Invention

In order to overcome the defects and shortcomings in the prior art, the invention aims to provide amphibious in-situ electric arc additive manufacturing equipment which is amphibious, can form a high-stiffness high-speed air curtain to form a local dry space, is convenient to obtain the distance between a welding wire and a base metal and can improve the quality of an electric arc additive manufacturing process. Another object of the present invention is to provide an arc additive manufacturing method of the amphibious in-situ arc additive manufacturing apparatus, which can realize an arc additive automation operation.

In order to achieve the purpose, the invention is realized by the following technical scheme: an amphibious in-situ arc additive manufacturing device is characterized in that: the device comprises a wide forbidden band additive power supply, a diving wire feeder, a welding torch, a protection device, a robot, a compressed gas device and a protection gas device;

the welding torch is connected with the robot so as to realize that the robot drives the welding torch to move to perform electric arc material increase operation; the wide forbidden band additive power supply, the submersible wire feeder and the welding torch are sequentially connected; the submersible wire feeder is also connected with a protective gas device; the wide forbidden band additive power supply is respectively connected with the compressed gas device and the protective gas device so as to realize the opening and closing of the compressed gas device and the protective gas device;

the protection device comprises an inner cylinder and an outer cover which are sleeved inside and outside; the inner cylinder forms an inner through hole; the top of the inner through hole is connected with the end part of the welding torch through threads; an interlayer convergence cavity with a downward opening and a convergence shape is formed between the outer cover and the inner cylinder; the wall of the interlayer convergence cavity is provided with a spiral structure; the outer cover is connected with at least one air inlet pipe; the compressed gas device is communicated with the interlayer convergence cavity through a gas inlet pipe.

In the electric arc additive manufacturing equipment, the robot is used for driving the welding torch to move to implement electric arc additive manufacturing; the wide forbidden band additive power supply is used for providing power supply for the welding torch, switching the compressed gas device and the protective gas device and driving the submersible wire feeder to feed wires; the submerged wire feeder is used for feeding welding wires; the compressed gas device is used for inputting compressed gas to the interlayer convergence cavity; the shielding gas device is used for conveying shielding gas to the welding torch contact nozzle. The electric arc additive manufacturing equipment can provide a protective atmosphere for onshore electric arc additive manufacturing, can also create a local drying space for underwater electric arc additive manufacturing water drainage protection, and realizes amphibious use of the electric arc additive manufacturing equipment.

When underwater electric arc additive manufacturing is carried out, a wide-bandgap additive power supply turns on a compressed air device, and as the space of an interlayer convergence cavity of a protection device is gradually reduced, compressed air output by the compressed air device forms spiral airflow, and the wall of the interlayer convergence cavity is provided with a spiral structure, the spiral airflow can be further accelerated, and an outlet below the opening of the interlayer convergence cavity forms a high-stiffness high-speed air curtain to create a local drying space for underwater electric arc additive manufacturing; the air curtain formed by the method has higher speed and higher stiffness than the existing water discharge cover, so that the arrangement of the water blocking sleeve can be reduced, the technical problem that the welding wire is blocked by the water blocking sleeve is solved, the distance between the welding wire and the base metal is convenient to obtain, and the improvement of the process quality of electric arc additive manufacturing is facilitated.

When the onshore electric arc additive manufacturing is carried out, a drying space is created without drainage, the wide forbidden band additive power supply closes the compressed gas device, and only the protective gas device is opened; at the moment, the protection device plays a role in protecting the nozzle of the welding torch, and the inner cylinder surrounds the protective gas sprayed out of the contact nozzle of the welding torch, so that a gas protection layer is formed to isolate the electric arc from air, and the additive forming quality of the onshore electric arc is improved.

Preferably, the helical structure comprises helical ribs provided along the inner wall of the outer casing and helical projections provided around the outer wall of the inner barrel.

Preferably, one end of the welding torch, which is far away from the protection device, is fixed on a sealing cover of the submerged wire feeder, so that a welding wire output by the submerged wire feeder extends into the inner through hole through the welding torch; the sealing cover of the diving wire feeder is also connected with the protective gas device, so that the protective gas output by the protective gas device flows into the inner through hole through the diving wire feeder and the welding torch.

Preferably, the number of the air inlet pipes is more than two; each air inlet pipe is respectively connected with the outer cover; each air inlet pipe is tangent to the interlayer convergence cavity respectively, so that compressed air enters the interlayer convergence cavity to form rotary airflow.

Preferably, the welding wire further comprises a vision sensor used for acquiring the distance between the welding wire and the base material; the vision sensor is arranged on the robot and is in signal connection with the robot.

Preferably, the wide bandgap additive power supply comprises a main circuit and a control circuit;

the main circuit comprises an input rectification filter circuit, a wide-bandgap full-bridge inverter circuit, a high-frequency transformer and a wide-bandgap full-wave rectification filter circuit which are sequentially connected; the input rectification filter circuit is connected with three-phase power frequency alternating current, and the full-wave rectification filter circuit is connected with the material increase arc load.

By adopting the optimally designed wide-bandgap material-increasing power supply, the inversion frequency of the hard switch can reach 200kHz and even higher, so that the volume of a magnetic element is reduced, the energy density is improved, the dynamic response is rapid, the fine regulation and control of the electric arc energy are facilitated, and the material-increasing electric arc stability is improved.

Preferably, the wide-bandgap full-bridge inverter circuit is formed by connecting wide-bandgap semiconductor power switching tubes into a full-bridge topology structure; the wide bandgap semiconductor power switch tube is a SiC MOSFET or SiC IGBT or GaN power device;

the wide-bandgap full-wave rectification filter circuit is formed by connecting a wide-bandgap Schottky diode and an output filter reactor into a full-wave rectification filter topological structure; the wide bandgap schottky diode is referred to as a SiC schottky diode or a GaN schottky diode.

Preferably, the control circuit comprises a power supply circuit connected with three-phase power frequency alternating current and used for supplying power, a microprocessor, a wide bandgap device high-frequency driving circuit connected with the microprocessor, a sampling feedback circuit and a switching signal control circuit;

the wide bandgap device high-frequency drive circuit is connected with a wide bandgap full-bridge inverter circuit of the main circuit; the sampling feedback circuit is connected with the wide-bandgap full-wave rectification filter circuit; and the switch signal control circuit is connected with the compressed gas device and the protective gas device respectively.

Preferably, the switching signal control circuit comprises a darlington transistor array driving chip ULN1 and two-way driving units; the two driving units respectively comprise a high-speed optical coupler U1, an MOS tube M1 and a diode D1;

the power supply circuit is provided with a first power supply and a second power supply, and the power supply voltage of the first power supply is less than or equal to that of the second power supply; the input end of the Darlington transistor array driving chip ULN1 is connected with the microprocessor; the input end of the high-speed optical coupler U1 is respectively connected with the first power supply and the output end of the Darlington transistor array driving chip ULN 1; the first output end of the high-speed optical coupler U1 is connected with the second power supply; the output end II of the high-speed optical coupler U1 is connected with the grid electrode of the MOS tube M1 through a resistor R3 and a resistor R5 which are connected in series; the junction of the resistor R3 and the resistor R5 is connected with the source electrode of the MOS transistor M1 through a resistor R6, and the source electrode of the MOS transistor M1 is grounded; the drain electrode of the MOS transistor M1 is connected with the anode of the diode D1, and the cathode of the diode D1 is connected with the second power supply; a capacitor C1 is connected between the first output end of the high-speed optical coupler U1 and the second output end of the high-speed optical coupler U1; and the second power supply and the drain electrode of the MOS transistor M1 are used as the output end of the switching signal control circuit together.

The darlington transistor array driving chip ULN1 improves the current driving capability; the high-speed optical coupler U1 plays an isolation role; the MOS transistor M1 is used as a switch; the diode D1 plays the role of follow current when the solenoid valves of the protection gas device and the compressed gas device are turned off, so as to eliminate the influence of back electromotive force generated when the solenoid valves are turned off and protect the switch signal control circuit.

The electric arc additive manufacturing method of the amphibious in-situ electric arc additive manufacturing equipment is characterized in that: the method comprises the following steps:

s1, the robot receives the additive model information, divides the additive model into a plurality of additive layers, and sets the manufacturing track, the power supply parameter, the wire feeding parameter, the advanced air feeding time and the delayed air feeding time of each additive layer; the power supply parameters include power supply current and voltage; the wire feeding parameters comprise wire feeding speed and wire feeding mode; setting an electric arc additive manufacturing occasion; setting the first additive layer as a current additive layer;

s2, moving the robot to the initial position of the manufacturing track of the current additive layer, and adjusting the distance from the welding torch to the parent metal to enable a protection device at the front end of the welding torch to be close to and attached to the parent metal;

s3, the robot sends the power supply parameters, the advanced air supply time and the delayed air supply time of the current additive layer to the wide forbidden band additive power supply, and sends the wire feeding parameters of the current additive layer to the diving wire feeder;

s4, judging the occasion of arc additive manufacturing by the robot:

if the underwater situation is the underwater situation, the robot sends an underwater operation signal to the wide-bandgap material-increasing power supply, the wide-bandgap material-increasing power supply opens the compressed air device, so that the compressed air discharges water in the interlayer convergence cavity of the protection device and forms a high-stiffness high-speed air curtain to create a local drying area for underwater electric arc material increasing manufacturing, and then the step is skipped to the step S5;

if the underwater situation is not the underwater situation, directly jumping to the step S5;

s5, turning on a protective gas device by a wide forbidden band additive power supply, and conveying the protective gas to a contact nozzle of a welding torch through a submersible wire feeder to form additive gas protective atmosphere; counting down the air supply time in advance;

s6, after the air supply time is finished in advance, the wide forbidden band additive material power supply continues to turn on the protective gas device; the submerged wire feeder is matched with a wide forbidden band additive power supply to carry out no-load slow wire feeding and arcing until the arcing is successful; then, after the robot receives an arc starting success signal sent by the wide-bandgap additive power supply, the robot moves according to the manufacturing track of the current additive layer, the wide-bandgap additive power supply outputs arc energy, and the submersible wire feeder feeds welding wires according to wire feeding parameters until the manufacturing track end point of the current additive layer is reached;

s7, stopping the output of arc energy by the wide-forbidden-band additive power supply, and stopping the welding wire feeding by the submerged wire feeder; counting down the lag air supply time; after the lag air supply time is over, the wide forbidden band additive power supply closes the protective gas device and the compressed gas device to complete the current additive layer accumulation;

s8, judging whether the current additive layer is the last additive layer: if so, finishing the additive forming; otherwise, the next additive layer stacking is carried out by jumping to S2.

The electric arc additive manufacturing method can realize amphibious electric arc additive manufacturing equipment, realize automatic electric arc additive operation, improve the quality and consistency of electric arc additive manufacturing process, save labor cost, and also can implement additive manufacturing at positions which are difficult to operate manually.

Compared with the prior art, the invention has the following advantages and beneficial effects:

1. the invention can provide a protective atmosphere for onshore electric arc additive manufacturing, and can also create a local drying space for the drainage protection of underwater electric arc additive manufacturing, thereby realizing the amphibious use of the electric arc additive manufacturing equipment;

2. the invention can form a high-stiffness high-speed air curtain to form a local drying space for underwater electric arc additive manufacturing, can reduce the arrangement of the water blocking sleeve, solves the technical problem that the welding wire is blocked by the water blocking sleeve, is convenient to obtain the distance between the welding wire and a base metal, and is beneficial to improving the process quality of electric arc additive manufacturing;

3. according to the invention, the optimally designed wide-bandgap material-adding power supply is adopted, and the hard-switch inversion frequency can reach 200kHz and even higher, so that the volume of a magnetic element is reduced, the energy density is improved, the dynamic response is rapid, the fine regulation and control of arc energy are favorably realized, and the material-adding arc stability is improved;

4. the invention can realize the automatic operation of electric arc additive manufacturing, improve the quality and consistency of the electric arc additive manufacturing process, save the labor cost and implement the additive manufacturing at the position which is difficult to operate manually.

Drawings

FIG. 1 is a schematic view of the overall structure of an arc additive manufacturing apparatus of the present invention;

FIG. 2 is a schematic structural diagram of a wide bandgap additive power supply in an arc additive manufacturing apparatus according to the present invention;

FIG. 3 is a schematic diagram of a switching signal control circuit in the arc additive manufacturing apparatus of the present invention;

fig. 4 is a schematic structural diagram of a protection device in the arc additive manufacturing equipment.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.