Handheld efficient multifunctional electric arc machining device with intelligent protection function

Abstract

The invention provides a handheld efficient multifunctional electric arc machining device with an intelligent protection function, and relates to the technical field of electric arc machining, the handheld efficient multifunctional electric arc machining device comprises a spherical-crown-shaped grinding wheel, a lower end protective cover is arranged below the spherical-crown-shaped grinding wheel, an upper end protective cover is arranged above the lower end protective cover, and electromagnets are arranged on the lower end protective cover and the upper end protective cover; two arc-shaped cleaning plates are arranged between the lower end protective cover and the upper end protective cover, an automatic protective mechanism is arranged above the arc-shaped cleaning plates, and the automatic protective mechanism is used for automatically turning over to stop splashing metal scraps when the equipment works. And the equipment is provided with a lower-end protective cover and an upper-end protective cover, the lower-end protective cover and the upper-end protective cover are both provided with electromagnets, the lower-end protective cover and the upper-end protective cover are automatically powered on to adsorb metal scraps splashed during machining during starting, a constraint cover is formed to prevent the scraps from splashing, the scalding risk of operators is reduced, and meanwhile damage of the scraps to equipment circuits and transmission parts is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of arc processing, and more specifically, relates to a handheld, efficient, multifunctional arc processing device with intelligent protection function. Background Art

[0002] In the field of arc machining technology, handheld, efficient and multifunctional arc machining devices are widely used in machinery manufacturing, mold processing, aerospace parts maintenance and other fields due to their advantages such as flexible operation, high machining efficiency and adaptability to complex surfaces and narrow spaces. However, existing equipment has problems such as insufficient protection functions, low degree of automation, core components are easily damaged by external force collisions when not working, and waste chips are not thoroughly cleaned. There is an urgent need for a new type of equipment with automatic protection, efficient cleaning and safety protection functions to solve the above technical problems.

[0003] A Chinese patent discloses a handheld high-speed arc machining device and method (Patent No. ZL201410014679.X), belonging to the field of special machining equipment. The device comprises a housing, a motor, a coupling, a spindle, a connecting flange, a horn, a protective cover, brushes, a conductive grinding wheel, a handle, an ultrasonic generator, and an arc machining control power supply. The motor drives the spindle through the coupling. The horn passes through the lower end of the housing and is fixedly connected to the conductive grinding wheel, both of which are insulated from each other. The spindle drives the horn through the connecting flange, and the horn's amplitude and frequency are adjusted by an ultrasonic generator. The conductive grinding wheel is connected to the cathode of the arc machining control power supply via a brush. This device combines three machining methods: high-speed arc machining, ultrasonic vibration, and grinding. By combining these methods, the material removal rate can be significantly improved, making it particularly suitable for on-site repair of surface fatigue layers on large and immovable scrap mechanical parts.

[0004] First, during the processing of the above-mentioned equipment, the problem of splashing and spreading of high-temperature metal waste chips generated by arc discharge is particularly prominent. The existing protective structures generally use fixed transparent baffles or simple metal covers, which can only form static shielding in front of the processing area. The protection range is limited to the limited angle within the operator's line of sight, and cannot effectively intercept waste chips flying in multiple directions such as the side and above. During processing, the waste chips excited by the arc energy are scattered and splashed at high speed. Even if the operator's arms, neck and other exposed parts are on the side of the equipment, they may still be burned by the flying high-temperature particles. The operation trajectory may even be offset due to the avoidance of the splash, affecting the accuracy of the workpiece.

[0005] Second, the above-mentioned equipment relies on manual cleaning of the protective cover, and it is difficult to completely remove metal scraps from gaps or complex surfaces. These residual scraps may fall off when the equipment is operated again and enter key parts such as transmission gears and circuit modules, causing risks such as mechanical jamming and circuit short circuits, which significantly affect the stability and safety of equipment operation. For example, fine scraps embedded in the gear meshing gap will increase transmission resistance, and long-term accumulation may cause gear wear and fracture; metal particles adhering to the circuit may cause short-circuit failures. In addition, manual cleaning requires frequent disassembly of the protective cover, which is not only cumbersome and time-consuming, but may also cause wear on component interfaces and loosening of protective structures due to repeated disassembly and assembly, further shortening the service life of the equipment and increasing maintenance costs. Such cleaning problems highlight the shortcomings of traditional equipment in the automation and reliability of the protection system, and need to be solved with more efficient cleaning technology. Summary of the Invention

[0006] In order to solve the above technical problems, the present invention provides a handheld, efficient, multifunctional arc machining device with intelligent protection function to solve the above problems.

[0007] A handheld, high-efficiency, multifunctional electric arc machining device with intelligent protection function comprises a spherical crown grinding wheel, a lower end protective cover is provided below the spherical crown grinding wheel, an upper end protective cover is provided above the lower end protective cover, both the lower end protective cover and the upper end protective cover are provided with electromagnets, two arc-shaped cleaning plates are provided between the lower end protective cover and the upper end protective cover, an automatic protection mechanism is provided above the arc cleaning plate, the automatic protection mechanism is used to automatically flip over to block flying metal waste when the equipment is working, and automatically return to its position to protect the spherical crown grinding wheel when the equipment is not working, an automatic cleaning mechanism is provided between the lower end protective cover and the upper end protective cover, the automatic cleaning mechanism is used to clean the metal waste remaining on the upper end protective cover and the lower end protective cover when flipping.

[0008] Preferably, the automatic protection mechanism includes a switch trigger, the switch trigger is provided with a device handle, the device handle is provided with a sliding groove, the switch trigger is slidably installed in the sliding groove, the switch trigger is fixedly installed with a first connecting rod, the first connecting rod is fixedly installed with a second connecting rod, the end of the second connecting rod is rotatably installed with a fifth connecting rod, the fifth connecting rod is rotatably installed with a pull rod, the pull rod is fixedly installed with a first transmission rod, the first transmission rod is fixedly installed on the lower end protective cover, the first transmission rod is fixedly installed with a fixing plate, the second transmission rod is fixedly installed on the fixing plate, the first transmission rod is fixedly installed with a first gear, the circumferential surface of the first gear is meshed with a second gear, the second gear is fixedly installed with the upper end protective cover, and the first gear is fixedly installed with the lower end protective cover.

[0009] Preferably, the automatic cleaning mechanism includes a screw rod, which is fixedly mounted on the second connecting rod, and the screw rod is rotatably mounted on the fixed plate. A spiral groove is provided on the screw rod, and an annular slider is slidably mounted in the spiral groove provided on the screw rod. Two groups of third connecting rods are fixedly mounted on the annular slider, and a fourth connecting rod is rotatably mounted on the third connecting rod. A reset spring is provided on the fourth connecting rod, and the arc-shaped cleaning plate is fixedly mounted on the fourth connecting rod. An ultrasonic generator is provided on the side of the lower end protective cover, and a high-voltage pulse power supply is provided under the ultrasonic generator.

[0010] Compared with the prior art, the present invention has the following beneficial effects: In the present invention, the safety and reliability of the equipment are significantly improved by providing an automatic protection mechanism. The equipment is provided with a lower end protective cover and an upper end protective cover, both of which are equipped with electromagnets. When started, they are automatically energized to absorb metal waste chips splashed during processing, forming a restraining cover to block the waste chips from splashing, reducing the risk of burns to operators, and at the same time reducing the damage of waste chips to the equipment circuit and transmission components. The automatic protection mechanism is linked to the switch trigger. During operation, the protective cover automatically opens to form a protective barrier, and immediately resets after shutdown to protect the spherical crown grinding wheel from damage due to external force collision.

[0011] In the present invention, an automatic protection mechanism is provided which is collaboratively composed of a switch trigger, an equipment handle, a first connecting rod, a second connecting rod and a gear set (a first gear, a second gear) and other components, and intelligent protection is achieved through mechanical linkage. When the equipment is started, the operator pulls the switch trigger to trigger the connecting rod transmission system, driving the first gear and the second gear to engage and rotate, so that the lower end protective cover and the upper end protective cover are synchronously opened to a specified angle, forming a protective barrier surrounding the processing area, effectively blocking flying waste chips. When the equipment is shut down, the switch trigger is reset, the gear set rotates in the opposite direction, and the protective cover automatically closes, completely wrapping the spherical crown grinding wheel to form a physical protective shell. This design avoids the hidden danger of exposed grinding wheels in the non-working state of traditional equipment, can effectively resist accidental collisions or external force impacts during transportation, prevent the edge of the grinding wheel from cracking or surface wear, ensure the processing accuracy of the equipment and the service life of core components, and significantly improve the reliability of the equipment in idle and transportation scenarios.

[0012] In the present invention, an automatic cleaning mechanism consisting of a screw rod, an annular slider, a third link, a fourth link, a return spring and an arc-shaped cleaning plate is provided to realize automatic cleaning of waste chips during the flipping process of the protective cover. When the protective cover moves, the screw rod transmission drives the annular slider to rotate, and then drives the third link and the fourth link to work together, so that the arc-shaped cleaning plate always rotates close to the inner wall of the protective cover under the pre-tightening force of the return spring, and efficiently scrapes off the attached metal waste chips. This design breaks through the limitations of traditional manual cleaning and can complete all-round cleaning without removing the protective cover, avoiding the problem of incomplete cleaning due to manual operation, and significantly improving the equipment maintenance efficiency. At the same time, it can effectively reduce the potential threat of waste residue to the transmission components and circuits of the equipment, reduce the risk of mechanical jams, circuit short circuits and other failures, and ensure the stability and reliability of the equipment operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a structural schematic diagram of the switch trigger of the present invention; Figure 3 It is a structural schematic diagram of the handle of the device of the present invention; Figure 4 This invention Figure 3 A magnified view of the structure at point A; Figure 5 It is a structural schematic diagram of the upper end protective cover of the present invention; Figure 6 It is a structural schematic diagram of the pull rod of the present invention; Figure 7 1 is a schematic structural diagram of the return spring of the present invention; Figure 8 is a schematic structural diagram of the second connecting rod of the present invention; Figure 9 It is a structural schematic diagram of the arc cleaning plate of the present invention.

[0014] In the figure, the correspondence between the component names and the drawing numbers is: 11. Ultrasonic generator; 12. High-voltage pulse power supply; 15. Spherical crown grinding wheel; 16. Equipment handle; 21. Switch trigger; 22. Sliding groove; 23. First connecting rod; 24. Second connecting rod; 25. Screw rod; 26. Annular slider; 27. Third connecting rod; 28. Fourth connecting rod; 29. ​​Return spring; 31. Fifth connecting rod; 32. Pull rod; 33. First transmission rod; 34. First gear; 35. Second gear; 36. Lower end protective cover; 37. Upper end protective cover; 38. Second transmission rod; 39. Fixed plate; 41. Arc cleaning plate. DETAILED DESCRIPTION

[0015] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0016] See also Figures 1-9 The present invention provides a handheld, efficient, and multifunctional electric arc processing device with an intelligent protective function, including a spherical crown grinding wheel 15. The spherical crown grinding wheel 15 is used to process metal surfaces. A lower protective cover 36 is provided below the spherical crown grinding wheel 15, and an upper protective cover 37 is provided above the lower protective cover 36. Both the lower protective cover 36 and the upper protective cover 37 are used to protect the spherical crown grinding wheel 15 and protect workers when the equipment is working. Electromagnets are provided on the lower protective cover 36 and the upper protective cover 37. When the equipment starts processing, the electromagnets are automatically energized to absorb metal waste chips splashed out when processing the metal surface. Two arc-shaped cleaning plates 41 are provided between the lower protective cover 36 and the upper protective cover 37. The arc-shaped cleaning plates 41 are made of polyethylene and can effectively scrape off metal waste chips attached to the surfaces of the lower protective cover 36 and the upper protective cover 37.

[0017] An automatic protection mechanism is provided above the arc-shaped cleaning plate 41. The automatic protection mechanism is used to automatically flip over to block the flying metal waste when the equipment is working, and automatically return to protect the spherical crown grinding wheel 15 when the equipment is not working. An automatic cleaning mechanism is provided between the lower end protective cover 36 and the upper end protective cover 37. The automatic cleaning mechanism is used to clean the metal waste remaining on the upper end protective cover 37 and the lower end protective cover 36 when flipping.

[0018] The automatic protection mechanism includes a switch trigger 21, which is used to control the on and off of the device circuit to start and stop the device. The switch trigger 21 is provided with a device handle 16, and the device handle 16 is provided with a sliding groove 22. The switch trigger 21 is slidably installed in the sliding groove 22. A first link 23 is fixedly installed on the switch trigger 21, and a second link 24 is fixedly installed on the first link 23. When the switch trigger 21 is pulled to move backward during work, the switch trigger 21 will drive the second link 24 to move backward synchronously through the fixed connection between the first link 23 and the second link 24. The end of the second link 24 is rotatably installed with a fifth link 31, and the fifth link 31 A pull rod 32 is rotatably installed on the upper portion, a first transmission rod 33 is fixedly installed on the pull rod 32, the first transmission rod 33 is fixedly installed on the lower end protective cover 36, a fixing plate 39 is fixedly installed on the first transmission rod 33, a second transmission rod 38 is fixedly installed on the fixing plate 39, a first gear 34 is fixedly installed on the first transmission rod 33, the first gear 34 is a gear with a 120° sector tooth area on the circumferential surface, and the rest of the gear is a smooth arc surface, the circumferential surface of the first gear 34 is meshed with a second gear 35, the second gear 35 is a gear with a 120° sector tooth area on the circumferential surface, and the rest of the gear is a smooth arc surface, when the second connecting rod 24 moves backward, it is connected to the first transmission rod 24 through the pull rod 32 The fixed connection of the movable rod 33 and the connection of the fifth link 31 between the pull rod 32 and the second link 24, the second link 24 pulls the pull rod 32 backward to drive the first transmission rod 33 to rotate 90 degrees counterclockwise, and the first transmission rod 33 then drives the first gear 34 to rotate synchronously, and the first gear 34 drives the second gear 35 to rotate 90 degrees in the opposite direction through meshing. The second gear 35 is fixedly installed on the upper end protective cover 37, and the first gear 34 is fixedly installed on the lower end protective cover 36. When the second gear 35 rotates, it drives the upper end protective cover 37 to rotate synchronously with the second gear 35 as the center of the circle. When the first gear 34 rotates, it drives the lower end protective cover 36 to rotate synchronously with the first gear 34 as the center of the circle. When the upper and lower protective covers 37 and 36 are rotated to the specified positions after the equipment is powered on, the electromagnets thereon will be automatically energized to start absorbing the metal scraps splashed out during the processing. When the switch trigger 21 is released, the switch trigger 21 automatically returns to the front end of the sliding slot 22, so that the lower and upper protective covers 36 and 37 return to their initial states. At this time, the electromagnets on the lower and upper protective covers 36 and 37 will automatically be powered off to release the absorption of the metal scraps. The flipped-back lower and upper protective covers 36 and 37 can effectively protect the spherical crown grinding wheel 15, avoiding malfunction of the spherical crown grinding wheel 15 caused by contact with external forces during the transportation process.

[0019] The automatic cleaning mechanism includes a screw rod 25, which is fixedly mounted on the second link 24, and the screw rod 25 is rotatably mounted on the fixed plate 39. A spiral groove is provided on the screw rod 25, and an annular slider 26 is slidably installed in the threaded groove provided on the screw rod 25. When the second link 24 moves, the screw rod 25 is driven to move synchronously. The second link 24 drives the annular slider 26 to rotate under the action of the groove provided on the screw rod 25. Two groups of third link rods 27 are fixedly mounted on the annular slider 26, and a fourth link rod 28 is rotatably mounted on the third link rod 27. A return spring 29 is provided on the fourth link rod 28, and one end of the return spring 29 is connected to the third link rod 27 and the other end is connected to the fourth link rod 28. The return spring 29 is used to connect the third link rod 27 and the fourth link rod 28. Provide a reset force so that it automatically returns to its initial position after being deviated by external force, while buffering the impact during the rotation process and maintaining a pre-tightened state. The arc cleaning plate 41 is fixedly mounted on the fourth link 28. When the switch trigger 21 is pulled or released, the annular slider 26 will rotate and drive the fourth link 28 and the arc cleaning plate 41 thereon to rotate with the annular slider 26 as the center of the circle. When the two sets of arc cleaning plates 41 contact the flipping lower end protective cover 36 and the upper end protective cover 37, under the action of the reset spring 29, the two sets of arc cleaning plates 41 will fit tightly against the inner walls of the lower end protective cover 36 and the upper end protective cover 37. The arc cleaning plates 41 rotate to remove the residual metal scraps on the inner walls of the lower end protective cover 36 and the upper end protective cover 37.

[0020] An ultrasonic generator 11 is provided on the side of the lower end protective cover 36. The ultrasonic generator 11 is used to convert industrial frequency alternating current into a high-frequency electrical signal to drive the ultrasonic transducer to generate high-frequency mechanical vibration. A high-voltage pulse power supply 12 is provided below the ultrasonic generator 11. The high-voltage pulse power supply 12 is used to generate a periodic high-voltage pulse signal to break through the medium between the electrode and the workpiece to ignite the arc.

[0021] Working principle: The first step is to complete the preparation work and debug the ultrasonic generator 11 and the high-voltage pulse power supply 12. The staff holds the equipment handle 16, aligns the spherical crown grinding wheel 15 with the area to be processed, and pulls the switch trigger 21 in the sliding groove 22 backward to trigger the equipment to be powered on. At this time, the electromagnets on the lower end protective cover 36 and the upper end protective cover 37 are energized synchronously to generate magnetism to absorb processing waste chips. The sliding of the switch trigger 21 drives the second link 24 to move backward through the first link 23. The second link 24 pulls the pull rod 32 through the fifth link 31, driving the first transmission rod 33 to rotate 90° clockwise. The first gear 34 fixed to the first transmission rod 33 rotates synchronously, driving the lower end protective cover 36 to rotate 90° with the gear axis as the fulcrum; the first gear 34 is connected to the first transmission rod 33. The meshing action drives the second gear 35 to rotate in the opposite direction, causing the upper protective cover 37 to flip outward synchronously. When the upper and lower protective covers flip to the horizontal position, they stop moving, and together form a restraining cover surrounding the spherical crown grinding wheel 15, forming a protective barrier for the processing area. After the equipment is powered on, the ultrasonic generator 11 converts the industrial frequency electricity into a high-frequency signal, drives the transducer to generate high-frequency mechanical vibration, and the high-voltage pulse power supply 12 outputs a periodic pulse voltage, which breaks through the medium between the grinding wheel and the workpiece and ignites the arc. The spherical crown grinding wheel 15 performs high-speed processing on the metal surface under the action of arc discharge. The metal waste chips flying during the processing are blocked by the restraining cover and absorbed by the electromagnet, effectively avoiding the damage to the operator and the pollution of the environment caused by the flying chips, thereby achieving safe and efficient processing operations.

[0022] In the second step, when the staff releases the switch trigger 21, the equipment circuit is disconnected from the power supply, and the electromagnets on the lower protective cover 36 and the upper protective cover 37 are de-energized synchronously. The adsorbed metal scraps fall off naturally due to the disappearance of magnetic force. At the same time, the switch trigger 21 is reset to drive the second link 24 to move forward, and synchronously drive the screw rod 25 fixed to the second link 24 to translate. The spiral groove on the surface of the screw rod 25 forces the annular slider 26 to rotate along the axis of the screw rod 25. The annular slider 26 drives the two groups of fourth links 28 to rotate through the third link 27, so that the arc cleaning plate 41 fixed to the fourth link 28 makes an arc motion with the annular slider 26 as the center of the circle. During the process of the protective cover flipping back to its original position, the reset spring 29 on the fourth link 28 always provides pre-tightening force, so that the arc cleaning plate 41 is closely fitted to the inner wall surface of the lower protective cover 36 and the upper protective cover 37. The gear set rotates in the opposite direction, and the upper and lower protective covers flip inward 90° from the horizontal restraint cover state to the vertical position. The arc-shaped cleaning plate 41 synchronously scrapes off the waste chips remaining on the inner wall of the protective cover during rotation, especially the fine particles that did not fall off in time after the electromagnet was powered off, to achieve cleaning without dead angles. When the protective cover is completely reset, the lower end protective cover 36 and the upper end protective cover 37 form a closed protective cover at the front end of the spherical crown grinding wheel 15, and the physical enclosing structure prevents the grinding wheel from being hit or squeezed by external forces during transportation. This protection mechanism not only avoids wear or deformation of the grinding wheel due to accidental impact, but also prevents debris from entering the processing area, providing safety protection for the next use of the equipment. During the whole process, the mechanical transmission, cleaning mechanism and protection function work together to ensure that the equipment automatically completes waste chip cleaning and protection reset after shutdown, thereby improving operational safety and maintenance convenience.

[0023] The embodiments of the present invention are presented for purposes of illustration and description and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments are chosen and described in order to better illustrate the principles of the invention and its practical application and to enable those skilled in the art to understand the invention and design various embodiments with various modifications as suited for specific applications.

Claims

1. A handheld, efficient, multifunctional arc machining device with intelligent protection function, comprising a spherical crown grinding wheel (15), characterized in that: A lower protective cover (36) is provided below the spherical crown grinding wheel (15), an upper protective cover (37) is provided above the lower protective cover (36), and electromagnets are provided on both the lower protective cover (36) and the upper protective cover (37), and two arc-shaped cleaning plates (41) are provided between the lower protective cover (36) and the upper protective cover (37); An automatic protection mechanism is provided above the arc-shaped cleaning plate (41), and the automatic protection mechanism is used to automatically flip over to block the flying metal scraps when the equipment is working, and automatically return to protect the spherical crown grinding wheel (15) when the equipment is not working. An automatic cleaning mechanism is provided between the lower end protective cover (36) and the upper end protective cover (37), and the automatic cleaning mechanism is used to clean the metal scraps remaining on the upper end protective cover (37) and the lower end protective cover (36) when the equipment is flipped.

2. A handheld, efficient, multifunctional arc machining device with intelligent protection function as claimed in claim 1, characterized in that: The automatic protection mechanism comprises a switch trigger (21), and a device handle (16) is provided on the switch trigger (21).

3. A handheld, efficient, multifunctional arc machining device with intelligent protection function as claimed in claim 2, characterized in that: A sliding groove (22) is provided on the device handle (16), the switch trigger (21) is slidably mounted in the sliding groove (22), and a first connecting rod (23) is fixedly mounted on the switch trigger (21).

4. A handheld, efficient, multifunctional arc machining device with intelligent protection function as claimed in claim 3, characterized in that: A second link (24) is fixedly mounted on the first link (23), a fifth link (31) is rotatably mounted on the end of the second link (24), and a pull rod (32) is rotatably mounted on the fifth link (31).

5. A handheld, efficient, multifunctional arc machining device with intelligent protection function as claimed in claim 4, characterized in that: A first transmission rod (33) is fixedly mounted on the pull rod (32), the first transmission rod (33) is fixedly mounted on the lower end protective cover (36), and a fixing plate (39) is fixedly mounted on the first transmission rod (33).

6. A handheld, efficient, multifunctional arc machining device with intelligent protection function as claimed in claim 5, characterized in that: A second transmission rod (38) is fixedly mounted on the fixed plate (39), and a first gear (34) is fixedly mounted on the first transmission rod (33).

7. A handheld, efficient, multifunctional arc machining device with intelligent protection function as claimed in claim 6, characterized in that: A second gear (35) is meshed with the circumferential surface of the first gear (34); the second gear (35) is fixedly mounted to the upper end protective cover (37); and the first gear (34) is fixedly mounted to the lower end protective cover (36).

8. A handheld, efficient, multifunctional arc machining device with intelligent protection function as claimed in claim 7, characterized in that: The automatic cleaning mechanism comprises a screw rod (25), wherein the screw rod (25) is fixedly mounted on the second connecting rod (24), the screw rod (25) is rotatably mounted on the fixed plate (39), and a spiral groove is provided on the screw rod (25).

9. A handheld, efficient, multifunctional arc machining device with intelligent protection function as claimed in claim 8, characterized in that: An annular slider (26) is slidably mounted in the threaded groove provided on the screw rod (25), two sets of third link rods (27) are fixedly mounted on the annular slider (26), a fourth link rod (28) is rotatably mounted on the third link rod (27), a return spring (29) is provided on the fourth link rod (28), and the arc-shaped cleaning plate (41) is fixedly mounted on the fourth link rod (28).

10. A handheld, efficient, multifunctional arc machining device with intelligent protection function as claimed in claim 9, characterized in that: An ultrasonic generator (11) is provided on the side of the lower end protective cover (36), and a high-voltage pulse power supply (12) is provided below the ultrasonic generator (11).

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