Air-cooled portable inverter welding machine

Abstract

The invention discloses an air-cooled portable inverter welding machine, and particularly relates to the technical field of electric welding machines, a clamping jaw I and a clamping jaw II are used for clamping and fixing the end part of an electrode and the periphery of a nozzle respectively, so that the electrode and the nozzle are stably positioned in the axial direction and the radial direction, and the clamped nozzle is driven to perform controlled rotation around the center of a hole II; the first clamping piece and the second clamping piece are cooperatively driven to be away from each other in the opposite directions, on the premise that the end of the electrode is kept not rotating through the first clamping jaw, the nozzle is driven by the second clamping jaw to generate thread unscrewing motion relative to the electrode till threaded connection between the electrode and the nozzle is completely separated, and automatic detaching and separating of the electrode and the nozzle are achieved. An operator does not need to use a wrench for hard screwing in a high-temperature and welding slag attachment environment, the labor intensity and the safety risks such as scalding and hand slipping are remarkably reduced, the corresponding electrode and the nozzle are driven to vertically face downwards and correspond to the cleaning unit and the scrap scraping unit, secondary manual adjustment is not needed, and the single-time maintenance period is shortened.

Description

Technical Field

[0001] This invention relates to the field of electric welding machine technology, specifically to an air-cooled portable inverter welding machine. Background Technology

[0002] Inverter welding machines are widely used in building construction, pipeline installation, steel structure fabrication, and equipment maintenance. Traditional welding machines mostly use a power frequency transformer structure, which is large, heavy, inefficient, and inconvenient to transport and move on-site, making them unsuitable for use in confined spaces or at heights. With the development of power electronics technology, inverter welding machines using high-frequency conversion technology have gradually become mainstream. They use power devices such as IGBTs to achieve high-frequency switching, converting power frequency energy into high-frequency energy and then rectifying it for output. This significantly reduces the size of the transformer, improves the overall efficiency, and provides conditions for the portability and miniaturization of welding machines. The welding machines also employ air cooling to adapt to portable operating environments.

[0003] A search revealed that the invention patent with publication number CN116475533A discloses an inverter welding machine that classifies the components on the circuit board into conventional components and heating components. The conventional components and heating components together form the internal circuit system of the inverter welding machine. The conventional components are installed inside the chassis along with the circuit board, while the heating components are integrated on the heating component mounting plate. The heat generated by the heating components during operation is dissipated by the oil tank, oil guide and heat sink.

[0004] When using an inverter welding machine, welding is completed by an electric arc generated between the electrode and the workpiece. However, a large amount of spattered welding slag is inevitably generated during the welding process. This welding slag easily adheres to the inner wall of the nozzle and the outer side of the bottom of the electrode. It not only partially blocks the gas channel of the nozzle and weakens the protective gas effect, leading to unstable electric arc and reduced weld quality, but also affects the subsequent normal use of the welding head. Operators need to manually loosen and disassemble the electrode and nozzle and clean them while the welding head is still at a high temperature and covered with welding slag. Direct contact with high temperature and slag-laden parts is labor-intensive and poses safety risks such as burns and slips. Moreover, it is difficult to achieve deep and consistent cleaning of the inner wall of the nozzle and the outer side of the bottom of the electrode by manual brushing and tapping. All of these factors affect the long-term stable operation and maintenance efficiency of the inverter welding machine. Summary of the Invention

[0005] The purpose of this invention is to provide an air-cooled portable inverter welding machine to solve the problems mentioned in the background art.

[0006] The main technical problem solved by this invention is: Welding slag easily adheres to the inner wall of the nozzle and the outer side of the bottom of the electrode. This not only partially blocks the gas passage of the nozzle and weakens the protective gas effect, leading to unstable arc and reduced weld quality, but also affects the subsequent normal use of the welded joint.

[0007] This invention can be achieved through the following technical solutions: A portable air-cooled inverter welding machine includes a welding machine body, on both sides of which are respectively installed mounting shells for winding welding cables and ground cables, and the interior of the mounting shells is provided with a screwing unit for removing electrodes and nozzles. The twisting unit includes clamping member one and clamping member two that move closer or further away from each other simultaneously; The clamping component one includes a limiting frame two with an opening one, and a gripper one is mounted on the inner wall surface of the limiting frame two via a rotary motor two; The clamping component two includes a limiting frame one with an opening two. The inner wall of the limiting frame one is provided with a limiting ring cavity. A toothed ring sleeve is rotatably installed on the outer side of the limiting ring cavity. A sliding block that rotates around the center of the opening two is provided on the inner side of the limiting ring cavity. A rotary motor one is installed on the upper end of the inner surface of the sliding block. The outer side of the sliding block is fixed to the inner side of the toothed ring sleeve. A gripper two is installed on the drive end of the rotary motor one. The clamping center of the gripper two is consistent with the center of the opening two of the limiting frame one. The upper part of the inner cavity of the mounting housing is equipped with a scraper unit that rotates and wipes the inner wall of the nozzle. The bottom of the inner partition of the mounting housing is equipped with a cleaning unit that rotates and fits against the outer side of the bottom of the electrode. After being moved into position, both gripper one and gripper two rotate counterclockwise, so that the electrode and nozzle are vertically collinear with the corresponding cleaning unit and scraping unit, respectively.

[0008] A further technical improvement of the present invention is that: a strip groove communicating with the limiting ring cavity is provided in the middle of the top surface of the limiting frame one, and a driving tooth that meshes with the outer tooth of the toothed ring sleeve is provided above the strip groove, and the driving tooth is driven by a motor one.

[0009] A further technical improvement of the present invention is that: the upper part of the first and second limiting frames is provided with a bidirectional screw driven by the second motor, and the bidirectional screw is threadedly connected to the first and second limiting frames respectively; The outer sides of the first and second limiting frames are limited and slidably fitted against the inner wall of the mounting shell.

[0010] A further technical improvement of the present invention is that the scraping unit includes a lifting rod, the pushing end of which is connected to a grinding base driven by a self-rotating motor, and the grinding base is adapted to the inner wall of the nozzle.

[0011] A further technical improvement of the present invention is that: the cleaning unit includes a linear guide rail mounted on a partition, and the slide of the linear guide rail is mounted with a fixed seat via a bracket; The fixed base is rotatably mounted in the middle to limit the movement of the grinding sleeve used in conjunction with the electrode. The outer wall of the grinding sleeve is fixedly fitted with a fixed toothed sleeve. A groove is provided on one side surface of the fixed base. The slide bracket is equipped with a second drive tooth that enters the slot and meshes with the fixed tooth sleeve.

[0012] A further technical improvement of the present invention is that: a winding reel for winding welding cables or ground cables is installed inside the mounting shell, and a plurality of limiting blocks are installed on the outer wall surface of the winding reel, with two adjacent limiting blocks forming a slot; A handwheel connected to a winding reel is mounted on the surface of the mounting housing.

[0013] A further technical improvement of the present invention is that: a limiting rod that slides through the interior of the partition is fixed on one side surface of the second limiting frame, a spring is sleeved on the outside of the limiting rod, and a locking block that is adapted to any one of the slots is provided at the end of the limiting rod.

[0014] A further technical improvement of the present invention is that a flap is installed at the bottom front side of the mounting shell, and the center of the end of the flap is rotatably connected to the mounting shell via a damping pin.

[0015] A further technical improvement of the present invention is that: a guide slide plate that slides on the limiting rail is provided at the bottom of the inner cavity of the mounting shell near the linear guide rail, and a brush that contacts the bottom surface of the inner cavity of the mounting shell is installed on the lower surface of the guide slide plate.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The electrode end and the outer periphery of the nozzle are clamped and fixed by clamp one and clamp two respectively, so that the electrode and the nozzle are stably positioned in both the axial and radial directions. The clamped nozzle is driven to rotate in a controlled manner around the center of the opening two. In conjunction with the drive clamp one and clamp two moving away from each other in opposite directions, while the electrode end is kept from rotating by clamp one, the nozzle is driven by clamp two to produce a thread loosening motion relative to the electrode until the threaded connection between the electrode and the nozzle is completely separated, realizing the automatic disassembly and separation of the electrode and the nozzle. There is no need for the operator to use a wrench to tighten in the high temperature and welding slag environment, which significantly reduces labor intensity and safety risks such as burns and slips. It also drives the corresponding electrode and nozzle to be vertically downward, corresponding to the cleaning unit and the scraping unit, eliminating the need for manual secondary adjustment, greatly simplifying the maintenance process and shortening the single maintenance cycle. 2. By setting up a cleaning unit and a scraping unit, the nozzle and electrode are separated, aligned, and cleaned. The grinding base extends downward into the nozzle to scrape off the welding slag adhering to the inner wall of the nozzle in a circumferential manner. The detached welding slag and waste chips fall directly to the bottom of the mounting shell cavity under gravity and are collected in a concentrated manner, which improves the gas protection effect and arc stability and ensures the quality of weld formation. Through the rotational friction of the inner wall of the grinding sleeve, the welding slag, metal spatter, and oxides adhering to the outer side of the bottom of the electrode are scraped and wiped in a circumferential manner. 3. Place the welding head into the twisting unit and keep the take-up reel in a stable position. When the electrode and nozzle are removed, the movement of the second limiting frame causes the limiting rod to slide and elastically compress the spring. At this time, the locking block enters the locking slot, thereby locking the take-up reel. Attached Figure Description

[0017] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0018] Figure 1 This is a schematic diagram of the external structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the mounting shell of the present invention; Figure 3 For the present invention Figure 2 A magnified view of a section at point A in the middle; Figure 4 For the present invention Figure 2 A magnified view of a section at point B in the middle; Figure 5 For the present invention Figure 2 A magnified view of a section at point C; Figure 6 This is a schematic diagram of the three-dimensional installation structure of the limiting frame one and the gripper two of the present invention.

[0019] In the diagram: 1. Welding machine body; 2. Mounting shell; 3. Handwheel; 4. Flip plate; 5. Rewind reel; 6. Lifting rod; 7. Grinding base; 8. Bidirectional screw; 9. Limiting frame one; 10. Limiting frame two; 11. Gripper one; 12. Gripper two; 13. Limiting rod; 14. Locking block; 15. Linear guide rail; 16. Fixed base; 17. Grinding sleeve; 18. Fixed gear sleeve; 19. Guide slide plate; 20. Brush; 21. Sliding block; 22. Rotary motor one; 23. Strip groove; 24. Drive gear one; 25. Limiting ring cavity; 26. Gear ring sleeve. Detailed Implementation

[0020] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided.

[0021] Please see Figures 1-6 As shown, the present invention provides an air-cooled portable inverter welding machine, including a welding machine body 1, and mounting shells 2 for winding welding cables and ground cables are respectively installed on both sides of the welding machine body 1. The mounting shells 2 are provided with a screwing unit for removing electrodes and nozzles. The twisting unit includes clamping member one and clamping member two that move closer or further away from each other simultaneously; The clamping component includes a second limiting frame 10 with an opening, and a first gripper 11 is mounted on the inner wall of the second limiting frame 10 via a second rotary motor. The clamping component 2 includes a limiting frame 9 with an opening 2. The inner wall of the limiting frame 9 is provided with a limiting ring cavity 25. A toothed ring sleeve 26 is rotatably installed on the outer side of the limiting ring cavity 25. A sliding block 21 that rotates around the center of the opening 2 is provided on the inner side of the limiting ring cavity 25. A rotary motor 22 is installed on the upper end of the inner surface of the sliding block 21. The outer side of the sliding block 21 is fixed to the inner side of the toothed ring sleeve 26. A gripper 2 12 is installed on the drive end of the rotary motor 22. The gripping center of the gripper 2 12 is consistent with the center of the opening 2 of the limiting frame 9. A scraper unit for rotating and wiping the inner wall of the nozzle is installed in the upper part of the inner cavity of the mounting housing 2. The bottom of the inner partition of the mounting housing 2 is equipped with a cleaning unit that rotates and fits against the outer side of the bottom of the electrode. After being moved into place, both gripper 11 and gripper 212 rotate 90 degrees counterclockwise, so that the electrode and nozzle are vertically collinear with the corresponding cleaning unit and scraping unit, respectively.

[0022] When maintaining the welding head, the first clamp 11 and the second clamp 12 are in an open and close-to-each-other state. The operator first inserts the welding gun head with the electrode and nozzle into the mounting shell 2, so that the electrode and nozzle extend into the corresponding areas of the opening one of the clamping part one and the opening two of the clamping part two, respectively. The first clamp 11 and the second clamp 12 clamp and fix the electrode end and the outer periphery of the nozzle, respectively, so that the electrode and nozzle are stably positioned in both the axial and radial directions. Among them, the clamping center of the first clamp 11 is consistent with the center of the first opening, and the two clamping centers are consistent to ensure the coaxiality of the electrode and the nozzle during the twisting process. After clamping is completed, the toothed ring sleeve 26 rotates around the center of the limiting ring cavity 25. Due to the fixation of the sliding block 21 and the toothed ring sleeve 26, the sliding block 21 is driven to slide along the annular trajectory of the limiting ring cavity 25, thereby driving the rotary motor 22 and the gripper 12 mounted on the upper end of its inner surface to rotate around the center of the opening, thereby driving the clamped nozzle to rotate in a controlled manner around the center of the opening. Simultaneously, with the first and second clamping components moving away from each other in opposite directions, and the electrode end kept from rotating by the first clamping jaw 11, the nozzle, driven by the second clamping jaw 12, undergoes a thread-loosening motion relative to the electrode until the threaded connection between the electrode and the nozzle is completely separated, thus achieving automatic disassembly of the electrode and the nozzle. The nozzle rotates around the center of the second hole while being clamped, and with the first and second clamping components moving away from each other, the threaded connection between the electrode and the nozzle is automatically loosened and separated. This eliminates the need for operators to use a wrench to tighten the connection in high-temperature and slag-adhered environments, significantly reducing labor intensity and safety risks such as burns and slips. When the electrode is separated from the nozzle thread but still held by grippers 11 and 12, the entire clamping unit is moved to the cleaning station. Then, grippers 11 and 12 rotate 90 degrees counterclockwise, causing the corresponding electrode and nozzle to face vertically downwards, corresponding to the cleaning unit and the scraping unit. No manual secondary adjustment is required, which greatly simplifies the maintenance process and shortens the single maintenance cycle. During the nozzle cleaning process, the scraping unit moves up and down from top to bottom. Its lower end is inserted into the nozzle and fits against the inner wall of the nozzle. Through the rotation of the scraping unit itself, the welding slag attached to the inner wall of the nozzle is scraped off in a circumferential manner. The detached welding slag and waste chips fall directly to the bottom of the inner cavity of the mounting shell 2 under the action of gravity and are collected in a concentrated manner, which improves the gas protection effect and arc stability and ensures the quality of weld formation. At the same time, the cleaning unit moves upward and covers the bottom of the electrode. Since the upper part of the electrode is fixed, the cleaning unit rotates and fits the electrode, scraping off the welding slag and spatter on the outside of the bottom of the electrode and removing them from the electrode surface. This prevents contaminants from affecting the arc ignition position and shape, improves arc stability, and enhances weld consistency. After cleaning is completed, the scraping unit and the cleaning unit return to their initial positions.

[0023] See Figure 6 As shown, the top surface of the limiting frame 9 is provided with a strip groove 23 that communicates with the limiting ring cavity 25. Above the strip groove 23 is a drive tooth 24 that meshes with the outer teeth of the toothed ring sleeve 26. The drive tooth 24 is driven by a motor.

[0024] The circumferential drive of the toothed ring sleeve 26 is achieved by the meshing of the drive tooth 24 with the outer teeth of the toothed ring sleeve 26. The rotation of the toothed ring sleeve 26 causes the sliding block 21 connected to the toothed ring sleeve 26 to move together.

[0025] See Figure 3 As shown, the upper part of the first limiting frame 9 and the second limiting frame 10 is provided with a bidirectional screw 8 driven by the second motor, and the bidirectional screw 8 is threadedly connected to the first limiting frame 9 and the second limiting frame 10 respectively. The outer sides of the first limiting frame 9 and the second limiting frame 10 are limited and slidably fitted to the inner wall of the mounting shell 2.

[0026] Initially, the first limiting frame 9 and the second limiting frame 10 are close together, and the first clamp 11 and the second clamp 12 are open to facilitate the entry of the welding head; After clamping the nozzle periphery and the electrode, the threaded relationship between the nozzle and the electrode is released as the nozzle rotates. At the same time, the first limiting frame 9 and the second limiting frame 10 are connected by the threaded sleeve of the bidirectional screw 8, so that the nozzle and the electrode are gradually separated in the axial direction.

[0027] See Figure 2 As shown, the chip scraping unit includes a lifting rod 6, and the pushing end of the lifting rod 6 is connected to a grinding base 7 driven by a self-rotating motor. The grinding base 7 is adapted to the inner wall of the nozzle.

[0028] The lifting rod 6 moves downwards vertically, causing the grinding base 7 to extend downwards into the nozzle and circumferentially fit against the inner wall of the nozzle. Then, the self-rotating motor is started, driving the grinding base 7 to rotate at high speed around its own axis. Utilizing the contact friction between the outer surface of the grinding base 7 and the inner wall of the nozzle, the welding slag and metal spatter adhering to the inner wall of the nozzle and near the nozzle orifice are circumferentially ground and scraped off. During the rotation, the up-and-down reciprocating motion expands the range of action of the grinding base 7 in the axial direction of the nozzle, continuously cleaning different height areas of the inner wall of the nozzle.

[0029] See Figure 5 As shown, the cleaning unit includes a linear guide rail 15 mounted on a partition, and a fixed seat 16 is mounted on the slide of the linear guide rail 15 via a bracket. A grinding sleeve 17 for use with the electrode is rotatably mounted in the middle of the fixed base 16. A fixed toothed sleeve 18 is fixedly sleeved on the outer wall of the grinding sleeve 17. A groove is provided on one side surface of the fixed base 16. The slide bracket is equipped with a drive gear 2 that enters the slot and meshes with the fixed gear sleeve 18.

[0030] Since the electrode is vertically downward, the fixed seat 16 rises under the drive of the linear guide rail 15, aligning the axis of the grinding sleeve 17 with the axis of the electrode. As it continues to move upward, the grinding sleeve 17 fits over the outer side of the bottom of the electrode from below, achieving circumferential coverage and limiting of the bottom of the electrode. This helps to control the relative position of the grinding sleeve 17 and the bottom of the electrode, avoiding eccentric contact and skewed friction caused by manual swinging or multi-degree-of-freedom movement, and ensuring the contact stability between the grinding sleeve 17 and the outer side of the bottom of the electrode during the cleaning process. Subsequently, the second drive tooth rotates around its own axis within the slot and engages with the fixed tooth sleeve 18, thereby driving the fixed tooth sleeve 18 and the grinding sleeve 17 it is fitted with to rotate around its own axis. Since the upper part of the electrode is held and fixed by the first clamp 11 and does not rotate, the grinding sleeve 17 rotates and fits around the electrode under the drive of the second drive tooth. Through the friction of the inner wall of the grinding sleeve 17, the welding slag, metal spatter and oxides attached to the outer side of the bottom of the electrode are scraped and wiped in a circumferential manner.

[0031] See Figure 1 and Figure 4 As shown, the inside of the mounting housing 2 is equipped with a winding reel 5 for winding welding cables or ground cables. Several limiting blocks are installed on the outer wall of the winding reel 5, and two adjacent limiting blocks form a slot. A handwheel 3, which is connected to the winding reel 5, is mounted on the surface of the mounting housing 2.

[0032] The handwheel 3 drives the winding reel 5 to rotate around its own axis, winding up the welding cables and ground cables on both sides respectively.

[0033] See Figure 3 As shown, a limiting rod 13 that slides through the interior of the partition is fixed on one side surface of the limiting frame 10. A spring is sleeved on the outside of the limiting rod 13, and a locking block 14 that is adapted to any one of the slots is provided at the end of the limiting rod 13.

[0034] The cable is wound up by the reel 5 driven by the handwheel 3. Then the welding head is placed into the twisting unit and the position of the reel 5 is kept stable. When the electrode and nozzle are removed, the movement of the second limiting frame 10 causes the limiting rod 13 to slide and elastically compress the spring. At this time, the locking block 14 enters the locking slot and locks the reel 5.

[0035] See Figure 2 and Figure 5 As shown, a flap 4 is installed on the bottom front side of the mounting shell 2, and the center of the end of the flap 4 is rotatably set to the mounting shell 2 via a damping pin. The bottom of the inner cavity of the mounting housing 2 is provided with a guide slide plate 19 that slides on the limit rail near the linear guide rail 15. A brush 20 that contacts the bottom surface of the inner cavity of the mounting housing 2 is installed on the lower surface of the guide slide plate 19.

[0036] When it is necessary to remove the welding slag and metal spatter cleaned from inside the housing, the operator only needs to push the flap 4 inward, so that the flap 4 slowly rotates around the damping pin to the open position, forming a slag discharge opening at the lower front of the mounting housing 2; manually push the guide slide plate 19 to slide horizontally to limit the movement, so that the waste debris scattered at the bottom of the inner cavity is concentrated forward by the brush 20, and the waste debris in the concentrated area is directly poured out or brushed out of the mounting housing 2 using the slag discharge opening formed at the front end of the housing.

[0037] In use, the present invention uses clamp 11 and clamp 22 to clamp and fix the electrode end and the outer periphery of the nozzle respectively, so that the electrode and the nozzle are stably positioned in both the axial and radial directions. The clamped nozzle is driven to rotate in a controlled manner around the center of the second opening. In conjunction with the drive clamp 1 and clamp 2 to move away from each other in opposite directions, while the electrode end is kept from rotating by clamp 11, the nozzle is driven by clamp 22 to generate a thread loosening motion relative to the electrode until the threaded connection between the electrode and the nozzle is completely separated, realizing the automatic disassembly and separation of the electrode and the nozzle. This eliminates the need for the operator to use a wrench to tighten in a high-temperature environment with weld slag, significantly reducing labor intensity and safety risks such as burns and slips. It also drives the corresponding electrode and nozzle to be vertically downward, corresponding to the cleaning unit and the scraping unit, eliminating the need for manual secondary adjustment, greatly simplifying the maintenance process and shortening the single maintenance cycle. By setting up a cleaning unit and a scraping unit, the nozzle and electrode are separated, aligned, and cleaned. The grinding base 7 extends downward into the nozzle to scrape off the welding slag adhering to the inner wall of the nozzle in a circumferential manner. The detached welding slag and waste chips fall directly to the bottom of the inner cavity of the mounting shell 2 under the action of gravity and are collected in a concentrated manner, which improves the gas protection effect and arc stability and ensures the quality of weld formation. Through the rotational friction of the inner wall of the grinding sleeve 17, the welding slag, metal spatter, and oxides adhering to the outer side of the bottom of the electrode are scraped and wiped in a circumferential manner. The welding head is placed into the twisting unit, and the position of the take-up reel 5 is kept stable. When the electrode and nozzle are removed, the movement of the second limiting frame 10 causes the limiting rod 13 to slide and elastically compress the spring. At this time, the locking block 14 enters the locking slot, thereby locking the take-up reel 5.

[0038] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A portable air-cooled inverter welding machine, comprising a welding machine body (1), characterized in that: The welding machine body (1) is equipped with mounting shells (2) on both sides for winding the welding cable and the ground cable, and the mounting shells (2) are provided with a screwing unit for removing the electrode and nozzle. The twisting unit includes clamping member one and clamping member two that move closer or further away from each other simultaneously; The clamping component includes a second (10) with an opening, and a first gripper (11) is mounted on the inner wall of the second (10) via a second rotary motor. The clamping component 2 includes a limiting frame 1 (9) with a second opening. The inner wall of the limiting frame 1 (9) is provided with a limiting ring cavity (25). A toothed ring sleeve (26) is rotatably installed on the outer side of the limiting ring cavity (25). A sliding block (21) is provided on the inner side of the limiting ring cavity (25) and rotates around the center of the second opening. A rotary motor 1 (22) is installed on the upper end of the inner surface of the sliding block (21). The outer side of the sliding block (21) is fixed to the inner side of the toothed ring sleeve (26). A gripper 2 (12) is installed on the driving end of the rotary motor 1 (22). The gripping center of the gripper 2 (12) is consistent with the center of the second opening of the limiting frame 1 (9). The upper part of the inner cavity of the mounting housing (2) is equipped with a scraper unit that rotates and wipes the inner wall of the nozzle. The bottom of the inner partition of the mounting shell (2) is provided with a cleaning unit that rotates and fits against the outer side of the bottom of the electrode. After being moved into place, both gripper one (11) and gripper two (12) rotate 90 degrees counterclockwise, so that the electrode and nozzle are vertically collinear with the corresponding cleaning unit and scraping unit, respectively.

2. The air-cooled portable inverter welding machine according to claim 1, characterized in that, The top surface of the limiting frame (9) is provided with a strip groove (23) that communicates with the limiting ring cavity (25). Above the strip groove (23) is a drive tooth (24) that meshes with the outer tooth of the toothed ring sleeve (26). The drive tooth (24) is driven by a motor.

3. The air-cooled portable inverter welding machine according to claim 1, characterized in that, The upper part of the first (9) and the second (10) of the restriction frame is provided with a bidirectional screw (8) driven by the second motor, and the bidirectional screw (8) is threadedly connected to the first (9) and the second (10) of the restriction frame respectively. The outer sides of the first (9) and second (10) of the limiting frame are limited and slidably fitted to the inner wall of the mounting shell (2).

4. The air-cooled portable inverter welding machine according to claim 1, characterized in that, The chip scraping unit includes a lifting rod (6), the pushing end of which is connected to a grinding seat (7) driven by a self-rotating motor, the grinding seat (7) being adapted to the inner wall of the nozzle.

5. The air-cooled portable inverter welding machine according to claim 1, characterized in that, The cleaning unit includes a linear guide (15) mounted on a partition, and the slide of the linear guide (15) is mounted with a fixed seat (16) via a bracket. The middle part of the fixed base (16) is rotatably mounted with a grinding sleeve (17) for use with the electrode. The outer wall of the grinding sleeve (17) is fixedly sleeved with a fixed toothed sleeve (18). A groove is provided on one side surface of the fixed base (16). The slide bracket is equipped with drive teeth that enter the slot and mesh with the fixed tooth sleeve (18).

6. The air-cooled portable inverter welding machine according to claim 1, characterized in that, The mounting housing (2) is equipped with a winding reel (5) for winding welding cables or ground cables. The outer wall of the winding reel (5) is equipped with several limiting blocks, and two adjacent limiting blocks form a slot. The surface of the mounting housing (2) is fitted with a handwheel (3) that is connected to the winding reel (5).

7. The air-cooled portable inverter welding machine according to claim 1, characterized in that, One side surface of the second limiting frame (10) is fixed with a limiting rod (13) that slides through the inside of the partition. A spring is sleeved on the outside of the limiting rod (13), and the end of the limiting rod (13) is provided with a card block (14) that is adapted to any card slot.

8. The air-cooled portable inverter welding machine according to claim 1, characterized in that, A flap (4) is installed on the bottom front side of the mounting shell (2), and the center of the end of the flap (4) is rotatably connected to the mounting shell (2) via a damping pin.

9. A portable air-cooled inverter welding machine according to claim 1, characterized in that, The bottom of the inner cavity of the mounting shell (2) is provided with a guide slide plate (19) that slides on the limiting rail near the linear guide rail (15). A brush (20) that contacts the bottom surface of the inner cavity of the mounting shell (2) is installed on the lower surface of the guide slide plate (19).

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