An arc welder

Abstract

The application discloses an electric arc welding machine, and relates to the field of welding machine applications, which comprises a welding machine main machine, a carbon dioxide gas cylinder, a welding gun and a three-in-one pipeline which are connected with each other, and a wire feeder is arranged on the side of the welding machine main machine, a reel welding wire is rotatably arranged in the wire feeder, a wire connecting mechanism and a wire feeding mechanism are arranged in the shell, the wire connecting mechanism is used for connecting new and old welding wires, and the wire feeding mechanism is used for feeding the welding wire on the reel welding wire into the three-in-one pipeline and the welding gun. The wire connecting mechanism is arranged, the ends of the new and old welding wires are connected into a whole by using a wire connecting sleeve, then the welding wires of different reel welding wires can be combined together to form a continuous welding wire for use, the wire feeding mechanism feeds new welding wire, the new welding wire pushes the old welding wire in the three-in-one pipeline to continue extending from the welding gun electrode nozzle, the welding wire in the three-in-one pipeline can continue to be used, and the waste of the welding wire is reduced.

Description

Technical Field

[0001] This invention relates to the field of welding machine applications, specifically to an electric arc welding machine. Background Technology

[0002] An electric arc welding machine is a welding device that uses electrical energy to break down air and generate a high-temperature electric arc (the arc temperature is above 6000℃). The heat of the electric arc melts the base material and filler metal, and after cooling, a weld is formed. The two poles of the electric arc make slight contact and then separate, the air ionizes and conducts electricity, forming a continuous high-temperature electric arc, which melts the metal and completes the welding. There is also a type of welding that uses oxy-acetylene flame welding, which is not an electric arc welding machine. It is generally called an oxy-arc welding machine. It does not rely on electricity, but only on a gas flame.

[0003] Commonly used arc welding methods include MIG welding (carbon dioxide gas shielded welding). The welding machine generates an electric arc when powered on, and a coiled welding wire is automatically fed and charged to the electrodes. Carbon dioxide gas is ejected from the welding torch, enveloping the molten pool, isolating it from air, and preventing oxidation. Semi-automatic wire-feed welding mainly includes the welding machine main unit, wire feeder, carbon dioxide cylinder, welding torch, and corresponding wiring. The negative output cable of the welding machine main unit is connected to the ground wire and then to the workpiece to be welded. The positive output cable is connected to the wire feeder. The integrated welding torch (with its own three-in-one cable) is connected to the wire feeder. The carbon gas cylinder is equipped with a heating and pressure reducing valve and connected to the wire feeder. In actual operation, the gas path is as follows: CO2 gas cylinder - heating and pressure reducing valve - rubber gas hose - wire feeder built-in solenoid valve - wire feeder internal gas hose (three-in-one pipeline) - welding torch built-in gas hose - protective gas ejected from the conductive nozzle; the main current circuit is as follows: welding machine DC positive terminal - thick welding cable - wire feeder conductive seat - welding torch conductive copper cable (three-in-one pipeline) - welding wire (from the wire feeder, passing through the three-in-one pipeline, and led out from the conductive nozzle) - electric arc - workpiece - ground clamp - welding machine DC negative terminal.

[0004] The wire feeder is an important component of MIG welding. Its main components include a coil of welding wire, a wire feeding device, and corresponding circuitry. The mainstream welding wires (carbon steel welding wire, stainless steel welding wire, and aluminum-magnesium welding wire) are coiled, with diameters ranging from approximately 0.8mm to 2.0mm or more, depending on the welding requirements. When installing the welding wire coil, the operator usually installs it manually. First, the end of the welding wire is disassembled (at this time, the end of the welding wire may be partially bent to prevent it from unwinding around the coil body; a small section can be cut off with a tool to ensure the end of the welding wire is smooth). The wire is then inserted into the guide hole of the wire feeding device, with the wire overlapping the surface of the wire feeding wheel until the end of the welding wire extends into the three-in-one pipeline. Then, the clamping wheel is rotated to be opposite the wire feeding wheel to fix and limit the welding wire. The welding gun is then started, and the drive device of the wire feeding wheel is activated through the control signal. The wire feeding wheel rotates to feed the welding wire, and the coil of welding wire rotates synchronously to unwind. The welding wire then passes through the three-in-one pipeline and extends out from the contact nozzle of the welding gun. Welding can then be carried out. When replacing the welding wire reel, the new reel uses the same installation method. However, the end of the previous reel, due to the conveying action, disengages from the wire feed wheel, causing this section of wire within the three-in-one conduit (2-5m) to lose its feeding function and remain inside the conduit. It is very difficult to push it out using the newly replaced reel because the spring wire feed hose inside the three-in-one conduit is a purely mechanical channel with a diameter larger than the welding wire diameter. This makes it impossible to ensure that the ends of the old and new welding wires are perfectly aligned, making it difficult to push the old wire out with the new one. If the wire gets stuck, it will also affect work efficiency. In practice, tools such as pliers are used to directly pull the welding wire out of the three-in-one conduit from the welding torch's contact nozzle, and then the welding wire is reinstalled. This results in some waste every time the reel is replaced. Summary of the Invention

[0005] Therefore, the purpose of this invention is to provide an arc welding machine to solve the technical problems mentioned in the background.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an arc welding machine, comprising a welding machine main unit, a carbon dioxide cylinder, a welding torch, and a three-in-one pipeline, wherein a wire feeder is provided on the side of the welding machine main unit, and the welding machine main unit, the carbon dioxide cylinder, the welding torch, the three-in-one pipeline, and the wire feeder are interconnected. The wire feeder includes a housing, a hatch is provided on the side of the housing, a rotatable coil of welding wire is rotatably disposed inside the housing, and a wire connecting mechanism and a wire feeding mechanism are provided inside the housing. The wire connecting mechanism is used to connect new and old welding wires, and the wire feeding mechanism is used to feed the welding wire on the coil of welding wire into the interior of the three-in-one pipeline and the welding torch. The connecting mechanism includes a base. Inside the base, two sets of symmetrically distributed clamping seats are movably mounted via a second guide rod and a second spring. The inner side of the clamping seats is provided with a fitting hole. A connecting sleeve is movably mounted in the fitting hole of the two sets of clamping seats. One end of the fitting hole is provided with an inner convex ring, which is used to axially limit the connecting sleeve. A connecting frame is provided on the side of the clamping seat. A clamping block is movably mounted on the side of the connecting frame via a third guide rod and a third spring. A connecting sleeve is also installed between the clamping blocks of the two sets of clamping seats. Both sets of clamping seats have through holes inside. The base is rotatably connected with a positive and negative threaded rod. One end of the positive and negative threaded rod is connected to a handle. The positive and negative threaded rods pass through the through holes of the two sets of clamping seats, and the diameter of the through holes is larger than that of the positive and negative threaded rods. The external threads of the positive and negative threaded rods are connected to two sets of symmetrically distributed locking frames. The two sets of locking frames are movably installed corresponding to the two sets of clamping seats, and the locking frames extend into the fitting holes of the clamping seats. The base has a crossbeam at the top and a pressing block below the crossbeam. The pressing block can be adjusted in height to press and separate the two sets of clamping seats.

[0007] By adopting the above technical solution and setting up a connecting wire mechanism, the ends of the old and new welding wires are connected into a whole using a connecting wire sleeve. In this way, welding wires from different reels can be combined to form a continuous welding wire for use. That is to say, after the end of the old welding wire in the three-in-one pipeline is fixedly connected to the head of the new welding wire through the connecting wire sleeve, the wire feeding mechanism delivers the new welding wire. The new welding wire will push the old welding wire in the three-in-one pipeline to continue to extend from the welding gun's conductive nozzle, allowing the welding wire in the three-in-one pipeline to continue to be used and reducing welding wire waste.

[0008] The invention is further configured such that a welding wire mounting shaft is provided at the temporal part of the housing, a knob cover is threadedly connected to the external part of the welding wire mounting shaft, and an installation section is provided on the external part of the welding wire mounting shaft. The width of the installation section is greater than the width of the welding wire reel. The installation section and the welding wire reel are fitted together and installed, and the knob cover is threadedly tightened to the end of the installation section.

[0009] Preferably, a welding wire mounting shaft and a knob cover are provided for the movable mounting of the welding wire reel, so that the welding wire reel can be rotated in the mounting section to loosen the welding wire.

[0010] The invention is further configured such that a wire guide is provided inside the housing between the welding wire mounting shaft and the wire connecting mechanism. The wire guide includes a rotatably mounted mounting ring. Inside the mounting ring, two sets of symmetrically distributed mounting frames are movably mounted via a first guide rod and a first spring. Guide wheels are rotatably connected inside both sets of mounting frames, and a wire binding hole is provided between the two sets of guide wheels.

[0011] Preferably, by setting a wire guide to accommodate the angle of the welding wire when it is unloaded from the spool, wear can be reduced. The two sets of guide wheels can be made of non-metallic materials, such as plastic.

[0012] The present invention is further configured such that the end of the fitting hole away from the inner convex ring is configured as a first guide arc, the wire feeding end of the clamping block is configured as a second guide arc, and the top of the two sets of clamping seats is provided with guide grooves, which match the extrusion blocks.

[0013] Preferably, by setting a first guide arc and a second guide arc, the connecting sleeve can be inserted into the two sets of clamping blocks and fitting holes more smoothly. Setting a guide groove also facilitates the separation of the extrusion block from the two sets of clamping seats.

[0014] The present invention is further configured such that the extrusion block and the crossbeam are movably mounted by means of a fourth guide rod and a pressure rod, and a fourth spring and an outer protruding ring are provided between the pressure rod and the crossbeam.

[0015] Preferably, by setting a pressure bar and a fourth spring, the operator can adjust the height of the extrusion block by controlling the pressure bar, thereby controlling the distance between the two sets of clamping seats.

[0016] The present invention is further configured such that the wire feeding mechanism includes a mounting plate, and a first wire inlet pipe and a second wire inlet pipe are respectively provided on both sides of the mounting plate, and the second wire inlet pipe is connected to a three-in-one pipeline.

[0017] Preferably, a wire feeding mechanism is provided to transport the welding wire, so that the welding wire is unloaded from the outside of the welding wire reel and then passes through the three-in-one pipeline and the welding gun.

[0018] The present invention is further configured such that a wire feeding wheel is rotatably provided on the side of the mounting plate, the wire feeding wheel is connected to a driving device, a movable frame is rotatably connected to the top of the mounting plate, and a wire pressing wheel is rotatably provided inside the movable frame, the wire pressing wheel and the wire feeding wheel correspondingly clamp and feed the welding wire.

[0019] Preferably, a wire feed roller is provided to provide power for the movement of the welding wire, and a wire pressure roller is provided to ensure that the welding wire is in close contact with the outside of the wire feed roller.

[0020] The invention is further configured such that a locking device is rotatably connected to the top of the mounting plate, the locking device is fixed and movable, the locking device includes a fifth guide rod rotatably connected to the mounting plate, a locking block is movably mounted on the outside of the fifth guide rod, a fifth spring is sleeved on the outside of the fifth guide rod, and an outer sleeve rod is provided at the end of the fifth guide rod.

[0021] Preferably, a locking device is provided to fix the movable frame. When the movable frame is open, it is more convenient for workers to install welding wire. When the movable frame is closed, the wire pressing wheel and the wire feeding wheel clamp the welding wire and play a conveying role.

[0022] In summary, the present invention has the following main beneficial effects: This invention, by setting up a wire-connecting mechanism, uses a wire-connecting sleeve to connect the ends of the old and new welding wires into a whole, so that welding wires from different reels can be combined to form a continuous welding wire for use. In other words, after the end of the old welding wire in the three-in-one pipeline is fixedly connected to the head of the new welding wire through the wire-connecting sleeve, the wire feeding mechanism delivers the new welding wire. The new welding wire will push the old welding wire in the three-in-one pipeline to continue to extend from the welding gun's conductive nozzle, allowing the welding wire in the three-in-one pipeline to continue to be used and reducing welding wire waste.

[0023] This invention reduces wire wear by incorporating a wire guide. In traditional wire feeders, the unwound welding wire is directly fed into the wire guide hole of the wire feeding mechanism. However, as the welding wire gradually unwounds on the drum, the local vertical and horizontal angles of the unwound wire dynamically change. This means that the angle of the welding wire entering the wire guide hole of the wire feeding mechanism is not always coaxial, causing friction between the welding wire and the edge of the wire guide hole, affecting the flatness of the welding wire surface. In contrast, the wire guide in this application uses two sets of symmetrically distributed guide wheels to constrain and form a wire bundle hole, allowing the welding wire to move within the wire bundle hole. Furthermore, the wire guide can swing freely horizontally, enabling dynamic adjustment of the horizontal angle as the welding wire moves within it. In the vertical direction of the guide wheels, the arc-shaped guiding effect of the outer circumference of the guide wheels reduces wire wear. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the wire feeder of the present invention; Figure 3 This is a schematic diagram of the installation of the welding wire on the wire feeder of the present invention; Figure 4 This is a schematic diagram of the wire guide structure of the present invention; Figure 5 This is a schematic diagram of the connecting wire mechanism of the present invention; Figure 6 This is a schematic diagram of the clamping seat of the connecting wire mechanism of the present invention being opened; Figure 7 This is a schematic diagram of the clamping base structure of the present invention; Figure 8 This is a schematic diagram showing the distribution of the connecting frame, clamping block, and connecting wire sleeve of the present invention; Figure 9 This is a schematic diagram of the connecting wire mechanism and the distribution of the two sets of connecting wire sleeves of the present invention; Figure 10 This is a schematic diagram of the distribution of the connecting wire sleeve and welding wire in this invention; Figure 11 This is a schematic diagram of the wire feeding mechanism of the present invention; Figure 12 This is a schematic diagram of the wire feeding mechanism of the present invention; Figure 13 This is a schematic diagram of the locking device structure of the present invention.

[0025] Explanation of reference numerals in the attached figures: 1. Welding machine main unit; 2. Carbon dioxide cylinder; 3. Welding torch; 4. Three-in-one pipeline; 5. Wire feeder; 6. Housing; 7. Door; 8. Welding wire mounting shaft; 9. Knob cover; 10. Mounting section; 11. Welding wire reel; 12. Wire guide; 1201. Mounting ring; 1202. First guide rod; 1203. First spring; 1204. Mounting bracket; 1205. Guide wheel; 13. Wire connecting mechanism; 1301. Base; 1302. Second guide rod; 1303. Second spring; 1304. Clamping seat; 1305. Fitting hole; 1306. Inner convex ring; 1307. First guide arc; 1308. Guide groove; 1309. Connecting bracket; 1310. Third guide rod; 13 11. Third spring; 1312. Clamping block; 1313. Second guide arc; 1314. Through hole; 1315. Positive and negative threaded rod; 1316. Turn handle; 1317. Locking frame; 1318. Crossbeam; 1319. Pressing block; 1320. Fourth guide rod; 1321. Pressure rod; 1322. Fourth spring; 14. Wire feeding mechanism; 1401. Mounting plate; 1402. First wire inlet tube; 1403. Second wire inlet tube; 1404. Wire feeding wheel; 1405. Movable frame; 1406. Pressure wheel; 15. Wire binding hole; 16. Wire connecting sleeve; 17. Locking device; 1701. Fifth guide rod; 1702. Locking block; 1703. Fifth spring; 1704. Outer rod. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0027] The embodiments of the present invention will now be described.

[0028] Please see Figure 1 - Figure 13 An arc welding machine includes a welding machine main unit 1, a carbon dioxide cylinder 2, a welding torch 3, and a three-in-one pipeline 4. A wire feeder 5 is provided on the side of the welding machine main unit 1. The welding machine main unit 1, carbon dioxide cylinder 2, welding torch 3, three-in-one pipeline 4, and wire feeder 5 are interconnected. The output end of the carbon dioxide cylinder 2 is connected to a heating and pressure reducing valve. The welding machine main unit 1 is connected to a distribution box. The wire feeder 5 includes a housing 6. A door 7 is provided on the side of the housing 6. The door 7 is equipped with a latch that can be opened to facilitate the replacement of welding wire by the operator. A rotatable drum of welding wire 11 is rotatably arranged inside the housing 6. The housing 6 also has a wire connecting mechanism 13 and a wire feeding mechanism 14. The wire connecting mechanism 13 is used to connect new and old welding wires. The wire feeding mechanism 14 is used to feed the welding wire on the drum of welding wire 11 into the three-in-one pipeline 4 and the welding torch 3. The three-in-one pipeline 4 is used for conveying, electrical, and welding wire. The connecting wire mechanism 13 includes a base 1301. Inside the base 1301, two symmetrically distributed clamping seats 1304 are movably mounted via a second guide rod 1302 and a second spring 1303. The second spring 1303 pushes the two sets of clamping seats 1304 to engage with each other. The inner side of each clamping seat 1304 has a fitting hole 1305. A connecting wire sleeve 16 is movably mounted within the fitting holes 1305 of the two sets of clamping seats 1304. The sizes of the fitting holes 1305 and the connecting wire sleeve 16 are matched, and one end of the fitting hole 1305 has an inner protruding ring 1306 for engaging the connecting wire sleeve 16. Axial limiting is provided to prevent the connecting sleeve 16 from sliding out of the fitting hole 1305 due to frictional traction when the welding wire moves. A connecting frame 1309 is provided on the side of the clamping seat 1304. A clamping block 1312 is movably installed on the side of the connecting frame 1309 through a third guide rod 1310 and a third spring 1311. A connecting sleeve 16 is also installed between the clamping blocks 1312 of the two sets of clamping seats 1304. The clamping block 1312 can be made of a material with a high coefficient of friction, such as textured plastic material, so that the clamping block 1312 can briefly clamp and limit the connecting sleeve 16 under the reset action of the third spring 1311. Both sets of clamping seats 1304 have through holes 1314 inside. The base 1301 is rotatably connected to a threaded rod 1315. One end of the threaded rod 1315 is connected to a handle 1316. The threaded rod 1315 passes through the through holes 1314 of the two sets of clamping seats 1304. The diameter of the through holes 1314 is larger than that of the threaded rod 1315, meaning that the threaded rod 1315 and the clamping seat 1304 do not contact each other. The threaded rod 1315 is externally connected to two sets of symmetrically distributed locking brackets 1317. The two sets of locking brackets 1317 are movably installed corresponding to the two sets of clamping seats 1304, and the locking brackets 1317 extend into the fitting holes 1305 of the clamping seats 1304. A crossbeam 1318 is provided on the top of the base 1301, and a pressing block 1319 is provided below the crossbeam 1318. The pressing block 1319 can be adjusted in height to press and separate the two sets of clamping seats 1304.

[0029] Please refer to the above embodiments for further details. Figure 6 and Figure 7 The housing 6 has a welding wire mounting shaft 8 at its temporal part. The welding wire mounting shaft 8 is externally threaded with a knob cover 9. The welding wire mounting shaft 8 is externally provided with a mounting section 10. The width of the mounting section 10 is greater than the width of the coil welding wire 11. The mounting section 10 and the coil welding wire 11 are fitted together. The knob cover 9 is threadedly tightened to the end of the mounting section 10. By setting the welding wire mounting shaft 8 and the knob cover 9 for movably mounting the coil welding wire 11, the coil welding wire 11 can be rotated in the mounting section 10 to release the welding wire.

[0030] Please refer to the above embodiments for further details. Figure 4 Inside the housing 6, between the welding wire mounting shaft 8 and the wire connecting mechanism 13, there is a wire guide 12. The wire guide 12 includes a rotatably mounted mounting ring 1201. Inside the mounting ring 1201, two sets of symmetrically distributed mounting brackets 1204 are movably mounted by a first guide rod 1202 and a first spring 1203. The inside of each set of mounting brackets 1204 is rotatably connected to a guide wheel 1205. A wire binding hole 15 is provided between the two sets of guide wheels 1205. The wire guide 12 is used to adapt to the angle when the welding wire 11 is unloaded from the drum, thereby reducing its wear. The two sets of guide wheels 1205 can be made of non-metallic materials, such as plastic.

[0031] Please refer to the above embodiments for further details. Figure 7 The end of the fitting hole 1305 away from the inner convex ring 1306 is set as the first guide arc 1307, and the wire feeding end of the clamping block 1312 is set as the second guide arc 1313. The top of the two sets of clamping seats 1304 is provided with guide grooves 1308, which match the extrusion block 1319. By setting the first guide arc 1307 and the second guide arc 1313, the connecting sleeve 16 can be inserted into the two sets of clamping blocks 1312 and the fitting hole 1305 more smoothly. Setting the guide groove 1308 also makes it easier for the extrusion block 1319 to separate the two sets of clamping seats 1304.

[0032] Please refer to the above embodiments for further details. Figure 6 The extrusion block 1319 and the crossbeam 1318 are movably installed by a fourth guide rod 1320 and a pressure rod 1321. A fourth spring 1322 and an outer protruding ring are provided between the pressure rod 1321 and the crossbeam 1318. By setting the pressure rod 1321 and the fourth spring 1322, the operator can adjust the height of the extrusion block 1319 by controlling the pressure rod 1321, thereby controlling the distance between the two sets of clamping seats 1304.

[0033] Please refer to the above embodiments for further details. Figure 12 The wire feeding mechanism 14 includes a mounting plate 1401. A first wire inlet pipe 1402 and a second wire inlet pipe 1403 are respectively provided on both sides of the mounting plate 1401. The second wire inlet pipe 1403 is connected to the three-in-one pipeline 4. By setting the wire feeding mechanism 14, the welding wire is transported and moved so that the welding wire is unloaded from the outside of the coiled welding wire 11 and then passes through the three-in-one pipeline 4 and the welding gun 3.

[0034] Please refer to the above embodiments for further details. Figure 12A wire feeding wheel 1404 is rotatably mounted on the side of the mounting plate 1401. The wire feeding wheel 1404 is connected to a drive device. A movable frame 1405 is rotatably connected to the top of the mounting plate 1401. A wire pressing wheel 1406 is rotatably mounted inside the movable frame 1405. The wire pressing wheel 1406 and the wire feeding wheel 1404 correspond to clamp and feed the welding wire. The wire feeding wheel 1404 is provided to provide power for the movement of the welding wire. The wire pressing wheel 1406 ensures that the welding wire is in close contact with the outside of the wire feeding wheel 1404.

[0035] Please refer to the above embodiments for further details. Figure 13 A locking device 17 is rotatably connected to the top of the mounting plate 1401. The locking device 17 is fixed to the movable frame 1405. The locking device 17 includes a fifth guide rod 1701 rotatably connected to the mounting plate 1401. A locking block 1702 is movably installed on the outside of the fifth guide rod 1701, and a fifth spring 1703 is sleeved on the outside of the fifth guide rod 1701. An outer sleeve rod 1704 is provided at the end of the fifth guide rod 1701. The locking device 17 is used to fix the movable frame 1405. When the movable frame 1405 is open, it will be more convenient for the staff to install the welding wire (when threading the wire for the first time, the staff manually pushes the welding wire to move within the wire feeding mechanism 14). When the movable frame 1405 is closed, the wire pressing wheel 1406 and the wire feeding wheel 1404 clamp the welding wire to perform the conveying function.

[0036] In practical operation, the present invention first requires the connection of the equipment's wiring. The welding machine host 1 is connected to the distribution box via an input cable. The positive output terminal on the side of the welding machine host 1 is connected to the wire feeder 5 via a thick welding cable. The negative output terminal on the side of the welding machine host 1 is connected to the workpiece via a ground cable. A control cable is connected between the welding machine host 1 and the wire feeder 5. A heating and pressure reducing valve and a gas supply pipe are installed at the output port of the carbon dioxide cylinder 2 and connected to the wire feeder 5. The heating and pressure reducing valve is also connected to the distribution box. Finally, the welding torch 3 is connected to the wire feeder 5 via a three-in-one pipeline 4.

[0037] Next, taking the replacement of the spool welding wire 11 by the wire feeder 5 as an example: At this time, a section of old welding wire remains in the three-in-one pipeline 4. The wire feeder 5 is equipped with a sensor, such as an inductive sensor, an infrared sensor, or a photoelectric sensor. Taking the photoelectric sensor as an example, the emitted light hits the welding wire between the connecting frame 1309 and the clamping seat 1304. The absence of material triggers the wire shortage alarm light. After a short delay, the wire feeding mechanism 14 is controlled to stop feeding the welding wire, causing the end of the old welding wire to move into the inside of the connecting sleeve 16 in the fitting hole 1305. First, the operator opens the hatch 7 on the side of the housing 6, then turns the knob cover 9 to remove the old spool welding wire 11 and install the new spool welding wire 11. Then, the head of the new spool welding wire 11 is disassembled. If the head is bent, it is cut off with pliers or other tools. At the same time, a set of connecting sleeves 16 is taken and inserted between the two sets of clamping blocks 1312 from the position of the second guide arc 1313. Under the reset action of the third spring 1311, the two sets of clamping blocks 1312 clamp the connecting sleeve 16. Then, the wire head of the new coiled welding wire 11 is passed through the wire bundle hole 15 of the wire guide 12, and then through the connecting sleeve 16 between the two sets of clamping blocks 1312. The new welding wire is then passed through until it enters the connecting sleeve 16 in the fitting hole 1305, until the head of the new welding wire and the end of the old welding wire are completely aligned in the connecting sleeve 16 in the fitting hole 1305. With one hand holding the new welding wire still, the other hand turns the handle 1316. The handle 1316 drives the forward and reverse threaded rods 1315 to rotate, which in turn brings the two sets of locking brackets 1317 closer to each other. The two sets of locking brackets 1317 extend into the fitting hole 1305 and clamp the connecting sleeve 16 in the fitting hole 1305. This causes the connecting sleeve 16 to deform locally and firmly bind the new and old welding wires. In other words, the new and old welding wires are clamped by deforming the connecting sleeve 16. Then, the handle 1316 is reset.

[0038] Next, one hand presses down on the pressure rod 1321, compressing the fourth spring 1322. The pressure rod 1321 descends, pushing the compression block 1319 down. Through the guide groove 1308, the two sets of clamping seats 1304 separate from each other. That is, the inner convex ring 1306 inside the contact clamping seat 1304 axially limits the connecting sleeve 16. At the same time, the separation of the two sets of clamping seats 1304 causes the connecting frame 1309 to separate, so that the two sets of clamping blocks 1312 no longer clamp the connecting sleeve inside. 16. Keeping the pressure rod 1321 in the pressed state, start the welding torch 3. The welding torch 3 starts the drive device of the wire feeding wheel 1404 through the control signal. The wire feeding wheel 1404 rotates and cooperates with the pressure wheel 1406 to feed the welding wire again. As the old welding wire is further fed, the new welding wire, the old welding wire, and the connecting sleeve 16 fixed between them will be led out from the fitting hole 1305 of the connecting mechanism 13. The feeding of the new welding wire drives the external sleeve, which was originally in two sets, to be connected. The connecting sleeve 16 between the clamping blocks 1312 is introduced into the fitting hole 1305 by the driving action of the new welding wire through the first guide arc 1307. The pressure rod 1321 is released and the hatch 7 is closed. At this time, the equipment can continue to carry out welding work. If the length of the three-in-one pipeline 4 is 3m, the working time is calculated according to the welding wire feeding speed. That is, after a certain amount of working time is accumulated in the next welding work, the equipment will issue a yellow alarm again. The operator needs to stop the welding work briefly and start the welding gun 3 again. That is, all the old welding wire in the welding gun 3 is used up, so that the connecting sleeve 16 emerges from the conductive nozzle of the welding gun 3. The connecting sleeve 16 needs to be cut off. After that, the equipment can be used normally for welding. At this time, the connecting sleeve 16 between the two sets of clamping blocks 1312 will be driven to be completely embedded in the fitting hole 1305 as the subsequent welding wire is gradually fed. It is restricted by the inner convex ring 1306, so that it always stays in the fitting hole 1305.

[0039] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the invention and are not intended to limit it. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the invention, but such modifications, substitutions, and variations are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. An arc welding machine, comprising a welding machine main unit (1), a carbon dioxide cylinder (2), a welding torch (3), and a three-in-one pipeline (4), characterized in that: The welding machine host (1) is provided with a wire feeder (5) on its side. The welding machine host (1), carbon dioxide cylinder (2), welding torch (3), three-in-one pipeline (4) and wire feeder (5) are interconnected. The wire feeder (5) includes a housing (6). A hatch (7) is provided on the side of the housing (6). A spool of welding wire (11) is rotatably provided inside the housing (6). A wire connecting mechanism (13) and a wire feeding mechanism (14) are provided inside the housing (6). The wire connecting mechanism (13) is used to connect new and old welding wires. The wire feeding mechanism (14) is used to feed the welding wire on the spool of welding wire (11) into the three-in-one pipeline (4) and the welding torch (3). The connecting wire mechanism (13) includes a base (1301). Inside the base (1301), two sets of symmetrically distributed clamping seats (1304) are movably mounted via a second guide rod (1302) and a second spring (1303). The inner side of the clamping seats (1304) is provided with a fitting hole (1305). A connecting wire sleeve (16) is movably mounted in the fitting hole (1305) of the two sets of clamping seats (1304), and one end of the fitting hole (1305) is provided with a connecting wire sleeve (16). An inner convex ring (1306) is provided, which is used to axially limit the connecting sleeve (16). A connecting frame (1309) is provided on the side of the clamping seat (1304). A clamping block (1312) is movably installed on the side of the connecting frame (1309) through a third guide rod (1310) and a third spring (1311). A connecting sleeve (16) is also installed between the clamping blocks (1312) of the two sets of clamping seats (1304). Both sets of clamping seats (1304) have through holes (1314) inside. The base (1301) is rotatably connected to a positive and negative threaded rod (1315). One end of the positive and negative threaded rod (1315) is connected to a handle (1316). The positive and negative threaded rod (1315) passes through the through holes (1314) of the two sets of clamping seats (1304), and the diameter of the through holes (1314) is larger than that of the positive and negative threaded rod (1315). The external threads of the positive and negative threaded rod (1315) are connected to two sets of symmetrically distributed locking frames (1317). The two sets of locking frames (1317) are movably installed corresponding to the two sets of clamping seats (1304), and the locking frames (1317) extend into the fitting holes (1305) of the clamping seats (1304). A crossbeam (1318) is provided on the top of the base (1301), and a pressing block (1319) is provided below the crossbeam (1318). The pressing block (1319) can be adjusted in height to press and separate the two sets of clamping seats (1304).

2. The arc welding machine according to claim 1, characterized in that: The housing (6) has a welding wire mounting shaft (8) at its temporal part. The welding wire mounting shaft (8) is connected to a knob cover (9) by an external thread. The welding wire mounting shaft (8) has an installation section (10) on its exterior. The width of the installation section (10) is greater than the width of the coil welding wire (11). The installation section (10) and the coil welding wire (11) are fitted together. The knob cover (9) is threaded and tightened to the end of the installation section (10).

3. The arc welding machine according to claim 1, characterized in that: Inside the housing (6), between the welding wire mounting shaft (8) and the wire connecting mechanism (13), there is a wire guide (12). The wire guide (12) includes a rotatably mounted mounting ring (1201). Inside the mounting ring (1201), two sets of symmetrically distributed mounting brackets (1204) are movably mounted by a first guide rod (1202) and a first spring (1203). Inside the two sets of mounting brackets (1204), there are rotatably connected guide wheels (1205). A wire bundle hole (15) is provided between the two sets of guide wheels (1205).

4. An arc welding machine according to claim 1, characterized in that: The end of the fitting hole (1305) away from the inner convex ring (1306) is set as a first guide arc (1307), the wire feeding end of the clamping block (1312) is set as a second guide arc (1313), and the top of the two sets of clamping seats (1304) is provided with guide grooves (1308), which match the extrusion block (1319).

5. An arc welding machine according to claim 1, characterized in that: The extrusion block (1319) and the crossbeam (1318) are movably installed by a fourth guide rod (1320) and a pressure rod (1321), and a fourth spring (1322) and an outer protruding ring are provided between the pressure rod (1321) and the crossbeam (1318).

6. An arc welding machine according to claim 1, characterized in that: The wire feeding mechanism (14) includes a mounting plate (1401), and a first wire inlet tube (1402) and a second wire inlet tube (1403) are respectively provided on both sides of the mounting plate (1401). The second wire inlet tube (1403) is connected to the three-in-one pipeline (4).

7. An arc welding machine according to claim 6, characterized in that: The mounting plate (1401) is rotatably provided with a wire feeding wheel (1404) on its side. The wire feeding wheel (1404) is connected to a driving device. The top of the mounting plate (1401) is rotatably connected with a movable frame (1405). The movable frame (1405) is rotatably provided with a wire pressing wheel (1406) inside. The wire pressing wheel (1406) and the wire feeding wheel (1404) respectively clamp and feed the welding wire.

8. An arc welding machine according to claim 7, characterized in that: The top of the mounting plate (1401) is rotatably connected to a locking device (17). The locking device (17) is fixed with a movable frame (1405). The locking device (17) includes a fifth guide rod (1701) rotatably connected to the mounting plate (1401). A locking block (1702) is movably installed on the outside of the fifth guide rod (1701). A fifth spring (1703) is sleeved on the outside of the fifth guide rod (1701). An outer sleeve rod (1704) is provided at the end of the fifth guide rod (1701).

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