A safety protection type carbon dioxide shielded welding machine and method for semi-trailer frame

Abstract

The present invention relates to the technical field of gas shielded welding, and proposes a safety protection type carbon dioxide shielded welding machine and method for a semi-trailer frame, wherein a safety protection type carbon dioxide shielded welding machine for a semi-trailer frame comprises a mobile frame, a welding machine body is mounted on the mobile frame, a control panel is mounted on the welding machine body, and the welding machine body also comprises a wire feeding assembly, a mounting frame, a gas supply assembly, a joint, a welding assembly and a spatter slag blocking assembly, wherein a wire feeding cavity is arranged in the welding machine body, the wire feeding assembly is mounted inside the wire feeding cavity, a mounting frame is fixedly mounted on the mobile frame, the gas supply assembly is mounted on the mounting frame, the joint is fixedly mounted on the welding machine body, the welding assembly is mounted at the end of the joint, and the spatter slag blocking assembly is mounted on the welding assembly. Through the above technical scheme, the problem of the mechanical properties and corrosion resistance of the weld being reduced and the dimensional accuracy of the weld being affected due to metal spatter during welding in the welding process in the prior art is solved.

Description

Technical Field

[0001] The invention relates to the technical field of gas shielded welding, and in particular to a safety protection type carbon dioxide shielded welding machine and method for a semitrailer frame. Background Art

[0002] Semi-trailers mainly include dump semi-trailers, high and low silo grid transport semi-trailers, straight beam semi-trailers, container transport semi-trailers, etc. The semi-trailer frame is mainly composed of beams, supporting beams, connecting beams, side beams, locks, traction pin connecting devices, panels, etc. When processing the frame of the semi-trailer, the welding of the semi-trailer frame is the key link to ensure the structural strength and stability of the vehicle. When welding the semi-trailer frame, using carbon dioxide shielded welding is an effective choice.

[0003] In practical applications, carbon dioxide shielded welding has been widely used in the welding of low-bed semi-trailer frames. For example, when welding longitudinal beams and cross beams, CO2 gas shielded welding or J422 welding rods are used for full welding, and the weld height is ≥4mm to ensure the welding quality.

[0004] During the welding process, metal spatter loss accounts for about 10% of the molten metal of the welding wire, and a large amount of smoke is generated. Welding spatter will not only reduce the utilization rate of welding metal, cause waste of welding materials, and increase welding costs, but also reduce the mechanical properties and corrosion resistance of the weld, resulting in surface defects such as unevenness and pores in the weld, affecting the dimensional accuracy of the weld, but also causing damage to the welder's eyes, skin, respiratory tract and other parts. Summary of the invention

[0005] The present invention provides a safety protection type carbon dioxide shielded welding machine and method for a semi-trailer frame, which solves the problem in the related art that in the welding process, the mechanical properties and corrosion resistance of the weld are reduced due to metal splashing during welding, thereby affecting the dimensional accuracy of the weld.

[0006] The technical solution of the present invention is as follows: A safety protection type carbon dioxide shielded welding machine for a semi-trailer frame comprises a mobile frame, a welding machine body is mounted on the mobile frame, a control panel is mounted on the welding machine body, and further comprises: Wherein, a wire feeding cavity is arranged in the welding machine body; A wire feeding assembly, the wire feeding assembly being installed inside the wire feeding cavity and used for placing and feeding welding wire during welding; A mounting frame, the mounting frame is fixedly mounted on the mobile frame, and the mounting frame is located at the rear side of the welding machine body; A gas supply assembly, which is mounted on the mounting frame and is used to supply shielding gas during welding; A joint, the joint being fixedly mounted on the welding machine body; A welding assembly, which is installed at the end of the joint and is used for welding; A splash slag blocking assembly, which is installed on the welding assembly and is used to block splashes that occur during welding; A fume treatment component is installed on the welding machine body and is used to collect waste gas generated during welding.

[0007] On the basis of the above scheme, the wire feeding assembly comprises: A rotating frame, the rotating frame is rotatably mounted inside the wire feeding cavity; Sliding frames, two of which are symmetrically and slidably mounted on the rotating frame; A docking block, on which the two sliding frames are rotatably mounted; First electric cylinders, two of which are symmetrically and fixedly mounted on the rotating frame, and output ends of the first electric cylinders are fixedly connected to the sliding frame; A welding wire reel, the rotating frame is provided with the welding wire reel, and the two ends of the welding wire reel are respectively adapted to the docking block; A wire feeding unit is installed inside the wire feeding cavity and is used to feed the welding wire into the welding position.

[0008] On the basis of the above scheme, the wire feeding unit comprises: A wire feeding frame, the wire feeding frame is fixedly installed inside the wire feeding cavity, and the wire feeding frame is located between the rotating frame and the joint; Wire feeding rollers, two of which are symmetrically and rotatably mounted on the wire feeding frame; A guide bucket, the guide bucket is fixedly mounted on one end of the wire feeding frame close to the rotating frame; A wire feeding tube, the wire feeding tube is fixedly installed between the wire feeding frame and the joint, and the wire feeding tube is coaxially arranged with the guide bucket; A guide frame, the guide frame is fixedly mounted on the entry end of the wire feeding tube; Driven gears, two driven gears are rotatably mounted inside the wire feeding frame, and the two driven gears are respectively fixedly connected to the ends of the two wire feeding rollers; A driving gear is rotatably mounted inside the wire feeding frame, and the driving gear is respectively meshed with the two driven gears; A motor is fixedly mounted on the wire feeding frame, and an output end of the motor is fixedly connected to the driving gear.

[0009] In addition to the above solutions, it also includes: Positioning frames, two of which are symmetrically and fixedly mounted on the wire feeding frame; A wire pressing frame, which is slidably mounted between the two positioning frames; A wire pressing wheel, two wire pressing wheels are rotatably mounted at the bottom of the wire pressing frame, and the two wire pressing wheels correspond to the wire feeding roller; Positioning grooves, both ends of the wire pressing frame are fixedly provided with the positioning grooves; A spring, wherein the spring is fixedly mounted on both of the positioning frames; A positioning block is fixedly installed on each of the two springs, and the positioning block is adapted to the positioning groove.

[0010] On the basis of the above scheme, the air supply assembly comprises: Gas cylinders, with the gas cylinders being arranged on both sides of the mounting frame; A binding strap, wherein both sides of the mounting frame are detachably provided with the binding strap, and the inner side of the binding strap is in contact with the gas cylinder; A tee, the tee is fixedly mounted on the mounting frame; A connecting pipe, wherein two connecting pipes are connected to the tee; Valves, two valves are fixedly installed at the positions where the two connecting pipes are connected to the three-way connection; One-way valve, both connecting pipes are connected with the one-way valve, and the one-way valve is detachably connected with the output end of the gas cylinder A welding gas source regulator, the input end of which is connected to the three-way connection; An exhaust pipe is fixedly installed inside the wire feeding cavity, an air outlet end of the exhaust pipe is connected to the joint, and an air inlet end of the exhaust pipe is connected to the output end of the welding gas source regulator.

[0011] On the basis of the above scheme, the welding assembly includes a hose, one end of which is detachably connected to the joint, and the other end of the hose is fixedly mounted with a welding gun body, the welding gun body consisting of a handle, a barrel and a welding nozzle, and further includes: A shell, wherein the shell is fixedly mounted on the handle; A plurality of clamp rings are fixedly mounted on the gun barrel and the hose at equal distances.

[0012] On the basis of the above scheme, the splash slag blocking assembly comprises: A mounting sleeve, the mounting sleeve being fixedly mounted on the gun barrel; A connecting sleeve, the connecting sleeve is fixedly mounted on the mounting sleeve; An outer conical retaining frame, the outer conical retaining frame is fixedly mounted on the bottom of the connecting sleeve; An inner conical retaining frame, the inner conical retaining frame being fixedly mounted on the bottom of the mounting sleeve; Small holes, a plurality of small holes are provided on the outer conical retaining frame and the inner conical retaining frame at equal angles in a circular shape.

[0013] In addition to the above solutions, it also includes: An air intake pipe, wherein the air intake pipe is fixedly installed between the plurality of clamp rings, the air intake pipe is fixedly connected to the housing, and the output end of the air intake pipe is communicated with the connecting sleeve; An air outlet pipe, wherein the air outlet pipe is fixedly installed between the plurality of clamp rings, the air outlet pipe is fixedly connected to the housing, and the input end of the air outlet pipe is communicated with the mounting sleeve; An exhaust frame, wherein the exhaust frame is fixedly mounted on the top of the welding machine body, and the output end of the exhaust pipe is connected to the air inlet end of the exhaust frame; A shell, the shell is fixedly mounted on the top of the exhaust frame, and the input end of the intake pipe is connected to the shell; A blower, wherein the output end of the blower is connected to the exhaust frame.

[0014] Based on the above solution, the flue gas treatment component includes: An exhaust fan, the exhaust fan being fixedly mounted on an air outlet end of the exhaust frame; Installation slots, a plurality of installation slots are provided at equal distances inside the exhaust frame: A plate-type filter core is detachably mounted inside each of the mounting grooves.

[0015] A safety protection type carbon dioxide shielded welding method for a semi-trailer frame uses the above-mentioned safety protection type carbon dioxide shielded welding machine for a semi-trailer frame, and comprises the following steps: S1. Move, push the mobile frame, move the welding machine body to the working position, and then install the hose on the joint; S2, installation, rotating the rotating frame to a certain angle, placing the welding wire reel wound with welding wire between the two sliding frames on the rotating frame, and then starting the two first electric cylinders, which push the sliding frames, thereby pushing the docking block to move until the docking block is connected to the welding wire reel; S3, wire threading, pass the welding wire through the guide bucket, and then feed the welding wire between the wire feeding roller and the wire pressing wheel, and then pass the welding wire through the guide frame into the wire feeding tube, and enter the hose through the joint; S4, clamp the wire, push the wire pressing frame to drive the wire pressing wheel to move downward until the wire pressing wheel contacts the welding wire. At this time, the positioning grooves at both ends of the wire pressing frame are at the position of the positioning blocks. The positioning blocks are pushed into the positioning grooves under the action of the springs, and the position of the wire pressing frame can be fixed. The welding wire is clamped by the setting of the wire pressing wheel and the wire feeding roller; S5, wire feeding, start the motor, the motor drives the driving gear to rotate, the driving gear drives the two driven gears to rotate at the same time, thereby driving the two wire feeding rollers to rotate in opposite directions at the same time, and the welding wire can be fed to the welding position with the cooperation of the wire pressing wheel; S6. Adjustment: select the appropriate current and voltage according to the thickness and type of welding materials, and adjust the wire feeding speed and carbon dioxide gas flow rate; S7. Installation: Place the gas cylinder on both sides of the mounting frame, then install the straps, fix the gas cylinder on the mounting frame, connect the gas outlet of the gas cylinder with the corresponding one-way valve, and then open the gas cylinder valve to allow the carbon dioxide in the gas cylinder to enter the one-way valve, and then the carbon dioxide enters the connecting pipe through the one-way valve; S8, gas supply, first open one of the valves to supply the shielding gas, and detect and control the flow rate by setting the welding gas source regulator. When the supply of one gas cylinder is insufficient, the corresponding valve can be closed, and then another valve can be opened to allow the other gas cylinder to continue to supply shielding gas; S9, welding, hold the handle, adjust the welding nozzle to align with the weld, start the welding machine, the current is transmitted to the welding nozzle through the wire, a high-temperature arc is generated, and at the same time, the welding wire is evenly moved out to melt the welding wire; S10, to prevent splashing, turn on the blower, and the blower sends air into the housing frame. The air entering the housing will enter the interior of the connecting sleeve through the air inlet pipe, and the air entering the connecting sleeve will enter the gap between the outer conical baffle frame and the inner conical baffle frame through the small hole. The gap between the outer conical baffle frame and the inner conical baffle frame is arranged in a conical shape to form an airflow barrier to block splashing; S11. Waste gas treatment. When waste gas is generated, the waste gas will pass through the small holes on the inner conical baffle and enter the inside of the installation sleeve. Then the waste gas will be discharged through the outlet pipe and finally enter the exhaust frame. It will be effectively filtered by the plate filter element and then discharged.

[0016] The working principle and beneficial effects of the present invention are: 1. In the present invention, through the setting of two valves, the two valves can independently control the flow rate of gas. Under the action of the welding gas source regulator, the stable supply of shielding gas during welding is ensured. In actual operation, one of the valves is opened first to supply shielding gas. Through the setting of the welding gas source regulator, the flow rate is detected and controlled. When one gas cylinder is insufficiently supplied, the corresponding valve can be closed and the other valve can be opened to allow the other gas cylinder to continue to supply shielding gas, thereby ensuring that the shielding gas is uninterrupted, thereby ensuring the welding quality.

[0017] 2. In the present invention, the air entering the shell will enter the interior of the connecting sleeve through the air inlet pipe, and the air entering the connecting sleeve will enter the gap between the outer conical baffle and the inner conical baffle through the small hole. The gap between the outer conical baffle and the inner conical baffle is arranged in a cone shape to form an airflow barrier, which can effectively block splashes and will not affect the flow of carbon dioxide protective gas.

[0018] 3. In the present invention, when waste gas is generated, the waste gas will pass through the small holes on the inner conical baffle and enter the interior of the mounting sleeve. Then the waste gas will be discharged through the exhaust pipe and finally enter the exhaust rack. After being processed, it can be discharged. This not only improves the welding efficiency, but also greatly reduces environmental pollution, ensures the safety and health of operators, and further optimizes the overall performance of the welding process.

[0019] 4. In the present invention, by setting up the gas supply component and adopting the method of alternating supply of dual gas cylinders, not only the welding efficiency is improved, but also the service life of the equipment is extended. The operator can flexibly adjust the gas source according to the actual welding needs to ensure the continuity and stability of the protective gas during the welding process. Through the cooperation of the splash slag blocking component and the fume treatment component, the splash and harmful fume generated during the welding process are treated to ensure the safety of the operating environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the overall structure from another angle in the present invention; Figure 3 It is a cross-sectional structural schematic diagram of the wire feeding assembly in the present invention; Figure 4 It is a schematic cross-sectional structure diagram of the wire feeding part in the present invention; Figure 5 It is a cross-sectional structural schematic diagram of the cooperation between the driving gear, the driven gear and the wire feeding roller in the present invention; Figure 6 It is a schematic diagram of the structure of the positioning frame, the wire pressing frame, the wire pressing wheel and the positioning groove in the present invention; Figure 7 It is a structural schematic diagram of the air supply component in the present invention; Figure 8 It is a schematic diagram of the structure of the welding assembly and the splash slag blocking assembly in the present invention; Fig. 9 It is a schematic cross-sectional structure diagram of the splash slag blocking assembly in the present invention; Fig.10 For the present invention Fig. 9 A schematic diagram of the local enlarged structure at point A in the middle; Fig.11 It is a schematic diagram of the structure of the cooperation between the splash slag blocking assembly and the fume treatment receiving component in the present invention; Fig.12 It is a schematic diagram of the cross-sectional structure of the flue gas treatment component in the present invention.

[0022] In the figure: 1, mobile frame; 2, welding machine body; 3, control panel; 4, mounting frame; 5, joint; 7, rotating frame; 8, sliding frame; 9, docking block; 10, first electric cylinder; 11, welding wire reel; 12, wire feeding frame; 13, wire feeding roller; 14, guide bucket; 15, wire feeding tube; 16, guide frame; 17, driven gear; 18, driving gear; 19, motor; 20, positioning frame; 21, wire pressing frame; 22, wire pressing wheel; 23, positioning groove; 24, spring; 25, positioning block; 26, gas cylinder; 27, binding Belt; 28. Tee; 29. ​​Connecting pipe; 30. Valve; 31. Check valve; 32. Welding gas source regulator; 33. Exhaust pipe; 34. Hose; 35. Handle; 36. Gun barrel; 37. Welding nozzle; 38. Shell; 39. Clamp ring; 40. Mounting sleeve; 41. Connecting sleeve; 42. Outer conical retaining frame; 43. Inner conical retaining frame; 44. Small hole; 45. Inlet pipe; 46. Exhaust pipe; 47. Exhaust frame; 48. Shell; 49. Blower; 50. Exhaust fan; 51. Mounting slot; 52. Plate filter element. DETAILED DESCRIPTION

[0023] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] Embodiment 1, as Figures 1 to 12As shown, this embodiment proposes a safety protection type carbon dioxide shielded welding machine for a semi-trailer frame, including a mobile frame 1, a welding machine body 2 is installed on the mobile frame 1, a control panel 3 is installed on the welding machine body 2, and also includes a wire feeding assembly, a mounting frame 4, a gas feeding assembly, a joint 5, a welding assembly, a spatter slag blocking assembly and a fume treatment assembly, wherein a wire feeding cavity is provided in the welding machine body 2, and the wire feeding assembly is installed inside the wire feeding cavity for placing and conveying welding wire during welding, and the wire feeding assembly includes a rotating frame 7, a sliding frame 8, and a docking frame 9. Block 9, the first electric cylinder 10, the welding wire reel 11 and the wire feeding part, the rotating frame 7 is rotatably installed inside the wire feeding chamber, two sliding frames 8 are symmetrically and slidably installed on the rotating frame 7, and the two sliding frames 8 are rotatably installed with a docking block 9, and two first electric cylinders 10 are symmetrically and fixedly installed on the rotating frame 7, and the output end of the first electric cylinder 10 is fixedly connected to the sliding frame 8. A welding wire reel 11 is arranged on the rotating frame 7, and the two ends of the welding wire reel 11 are respectively adapted to the docking block 9, and the wire feeding part is installed inside the wire feeding chamber, and is used for feeding the welding wire into the welding position.

[0025] Specifically, when welding the frame of the semi-trailer, first push the mobile frame 1, move the welding machine body 2 to the working position, then install the welding assembly on the joint 5, and then install the welding wire. At this time, rotate the rotating frame 7 to a certain angle, and place the welding wire reel 11 wound with the welding wire between the two sliding frames 8 on the rotating frame 7. At this time, start the two first electric cylinders 10, and the first electric cylinders 10 push the sliding frames 8, thereby pushing the docking block 9 to move until the docking block 9 is connected to the welding wire reel 11. Then move the rotating frame 7 back to the working position, send the end of the welding wire on the welding wire reel 11 into the wire feeding part, and then start the wire feeding part to send the welding wire to the working position of the welding assembly, then connect the black ground wire at the output end of the welding machine body to the welding workpiece, connect the red electrode wire at the output end of the welding machine to the welding assembly, correctly wire the input power supply, and connect the input end plug to the input port of the welding machine body, and then select the appropriate current and voltage according to the thickness and type of the welding material, and adjust the wire feeding speed and the gas flow of carbon dioxide at the same time, and then start welding the frame.

[0026] The above, such as Figures 4 to 6As shown, the wire feeding part includes a wire feeding frame 12, a wire feeding roller 13, a guide bucket 14, a wire feeding tube 15, a guide frame 16, a driven gear 17, a driving gear 18 and a motor 19. The wire feeding frame 12 is fixedly installed inside the wire feeding cavity, and the wire feeding frame 12 is located between the rotating frame 7 and the joint 5. Two wire feeding rollers 13 are symmetrically and rotatably installed on the wire feeding frame 12. The guide bucket 14 is fixedly installed at one end of the wire feeding frame 12 close to the rotating frame 7. The wire feeding tube 15 is fixedly installed between the wire feeding frame 12 and the joint 5. The wire feeding tube 15 is coaxially arranged with the guide bucket 14. The guide frame 16 is fixedly installed at the entrance end of the wire feeding tube 15. Two driven gears 17 are rotatably installed inside the wire feeding frame 12. The two driven gears 17 are respectively fixedly connected to the ends of the two wire feeding rollers 13. The wire feeding frame 12 is rotatably installed inside. A driving gear 18 is installed, and the driving gear 18 is meshed with two driven gears 17 respectively. The motor 19 is fixedly installed on the wire feeding frame 12, and the output end of the motor 19 is fixedly connected to the driving gear 18. It also includes a positioning frame 20, a wire pressing frame 21, a wire pressing wheel 22, a positioning groove 23, a spring 24 and a positioning block 25. Two positioning frames 20 are symmetrically and fixedly installed on the wire feeding frame 12, and a wire pressing frame 21 is slidably installed between the two positioning frames 20. Two wire pressing wheels 22 are rotatably installed at the bottom of the wire pressing frame 21. The two wire pressing wheels 22 correspond to the wire feeding roller 13. Positioning grooves 23 are fixedly opened at both ends of the wire pressing frame 21. Springs 24 are fixedly installed on the two positioning frames 20, and positioning blocks 25 are fixedly installed on the two springs 24. The positioning blocks 25 are adapted to the positioning grooves 23.

[0027] Specifically, after the wire reel 11 is installed, the welding wire is passed through the guide bucket 14, and the welding wire can be fed between the wire feeding roller 13 and the wire pressing wheel 22. The welding wire is then fed into the wire feeding tube 15 through the guide frame 16 and enters the welding assembly through the joint 5. The wire pressing frame 21 is then pushed to drive the wire pressing wheel 22 to move downward until the wire pressing wheel 22 contacts the welding wire. At this time, the positioning grooves 23 at both ends of the wire pressing frame 21 are in the positions of the positioning blocks 25. The positioning blocks 25 are pushed into the positioning grooves 23 under the action of the springs 24, and the position of the wire pressing frame 21 can be fixed. The welding wire can be clamped by the arrangement of the wire pressing wheel 22 and the wire feeding roller 13. When the welding wire needs to be fed into the welding position, the motor 19 is started, and the motor 19 drives the driving gear 18 to rotate. The driving gear 18 drives the two driven gears 17 to rotate at the same time, thereby driving the two wire feeding rollers 13 to rotate in the opposite direction at the same time, and the welding wire can be fed to the welding position with the cooperation of the wire pressing wheel 22.

[0028] like Figure 7As shown, a mounting frame 4 is fixedly installed on the mobile frame 1, and the mounting frame 4 is located at the rear side of the welding machine body 2. The gas supply assembly is installed on the mounting frame 4 and is used to deliver protective gas during welding. The gas supply assembly includes a gas cylinder 26, a strap 27, a tee 28, a connecting pipe 29, a valve 30, a one-way valve 31, a welding gas source regulator 32 and an exhaust pipe 33. Gas cylinders 26 are arranged on both sides of the mounting frame 4. The straps 27 are detachably arranged on both sides of the mounting frame 4. The inner side of the straps 27 is in contact with the gas cylinder 26. The tee 28 is fixedly installed. On the mounting frame 4, two connecting pipes 29 are connected to the tee 28, and two valves 30 are fixedly installed at the positions where the two connecting pipes 29 are connected to the tee 28. The two connecting pipes 29 are connected to a one-way valve 31, and the one-way valve 31 is detachably connected to the output end of the gas cylinder 26. The input end of the welding gas source regulator 32 is connected to the tee 28, and the exhaust pipe 33 is fixedly installed inside the wire feeding cavity. The outlet end of the exhaust pipe 33 is connected to the joint 5, and the inlet end of the exhaust pipe 33 is connected to the output end of the welding gas source regulator 32.

[0029] Specifically, during the welding process, it is also necessary to release the carbon dioxide protective gas at the welding position. First, place the gas cylinder 26 on both sides of the mounting frame 4, and then install the strap 27, then fix the gas cylinder 26 on the mounting frame 4, and connect the gas outlet of the gas cylinder 26 with the corresponding one-way valve 31, and then open the gas cylinder 26 valve to allow the carbon dioxide in the gas cylinder 26 to enter the one-way valve 31, and the carbon dioxide enters the connecting pipe 29 through the one-way valve 31, and then passes through the valve 30 to enter the three-way 28, and then enters the welding gas source regulator 32. Through the setting of the welding gas source regulator 32, the flow rate of the output carbon dioxide is adjusted to facilitate the control of the gas flow rate, and then the carbon dioxide gas is sent to the exhaust pipe 33, and then enters the joint 5, and then enters the welding position.

[0030] It should be added that the shielding gas flow range of the double shielding welding machine is usually 10 to 25 liters per minute. Under normal circumstances, each kilogram of liquid carbon dioxide can produce 509 liters of gas. Therefore, a bottle of liquid carbon dioxide can release about 15,000 liters of gas. At a flow rate of 10 liters per minute, it can be used for 1500 minutes, about 25 hours; if the flow rate is 25 liters per minute, it can be used for 600 minutes, that is, it can only be used for about 10 hours. Therefore, during use, the flow rate should be reasonably adjusted according to the welding requirements. At this time, through the setting of the two valves 30, the two valves 30 can independently control the flow rate of the gas. Under the action of the welding gas source regulator 32, a stable supply of shielding gas during welding is ensured. In actual operation, one of the valves 30 is first opened to supply the shielding gas. Through the setting of the welding gas source regulator 32, the flow rate is detected and controlled. When one gas cylinder 26 is insufficiently supplied, the corresponding valve 30 can be closed, and then the other valve 30 is opened to allow the other gas cylinder 26 to continue to supply the shielding gas, ensuring that the shielding gas is uninterrupted, thereby ensuring the welding quality. Through this alternating supply method of the two gas cylinders 26, not only the welding efficiency is improved, but also the use time of the equipment is extended. The operator can flexibly adjust the gas source according to the actual welding requirements to ensure the continuity and stability of the shielding gas during welding.

[0031] like Figure 8 As shown, the connector 5 is fixedly mounted on the welding machine body 2, and the welding assembly is mounted at the end of the connector 5. The welding assembly includes a hose 34, one end of the hose 34 is detachably connected to the connector 5, and the other end of the hose 34 is fixedly mounted with a welding gun body. The welding gun body consists of a handle 35, a barrel 36, and a welding nozzle 37, and also includes a shell 38 and a clamp ring 39. The shell 38 is fixedly mounted on the handle 35, and a plurality of clamp rings 39 are fixedly mounted on the barrel 36 and the hose 34 at equal distances.

[0032] Specifically, during welding, hold the handle 35, adjust the welding nozzle 37 to align with the weld, start the welding machine, and the current is transmitted to the welding nozzle 37 through the wire to generate a high-temperature arc. At the same time, the welding wire is evenly moved out to melt the welding wire. At the same time, the protective gas evenly covers the weld to prevent oxidation and ensure the quality of the weld. By precisely controlling the coordination of the arc and the welding wire, the welding process is more stable.

[0033] like Figures 9 to 11As shown, the splash slag blocking assembly is installed on the welding assembly to block the splash generated during welding. The splash slag blocking assembly includes a mounting sleeve 40, a connecting sleeve 41, an outer conical blocking frame 42, an inner conical blocking frame 43 and a small hole 44. The mounting sleeve 40 is fixedly mounted on the barrel 36, the connecting sleeve 41 is fixedly mounted on the mounting sleeve 40, the outer conical blocking frame 42 is fixedly mounted on the bottom of the connecting sleeve 41, and the inner conical blocking frame 43 is fixedly mounted on the bottom of the mounting sleeve 40. The outer conical blocking frame 42 and the inner conical blocking frame 43 are both provided with a plurality of small holes 44 at equal angles in a circular shape, and also include an air inlet pipe 45, an air outlet pipe 46, an exhaust frame 47, and a shell 48. and a blower 49, an air inlet pipe 45 is fixedly installed between the multiple clamping rings 39, the air inlet pipe 45 is fixedly connected to the outer shell 38, the output end of the air inlet pipe 45 is communicated with the connecting sleeve 41, an air outlet pipe 46 is fixedly installed between the multiple clamping rings 39, the air outlet pipe 46 is fixedly connected to the outer shell 38, the input end of the air outlet pipe 46 is communicated with the mounting sleeve 40, an exhaust frame 47 is fixedly installed on the top of the welding machine body 2, the output end of the air outlet pipe 46 is communicated with the air inlet end of the exhaust frame 47, a shell 48 is fixedly installed on the top of the exhaust frame 47, the input end of the air inlet pipe 45 is communicated with the shell 48, and the output end of the blower 49 is communicated with the exhaust frame 47.

[0034] Specifically, during the welding process, metal spatter loss accounts for about 10% of the molten metal of the welding wire, and a large amount of smoke is generated. At this time, the blower 49 is turned on, and the blower 49 sends air into the shell 48 frame. The air entering the shell 48 will enter the inside of the connecting sleeve 41 through the air inlet pipe 45, and the air entering the connecting sleeve 41 will enter the gap between the outer conical baffle 42 and the inner conical baffle 43 through the small hole 44. The gap between the outer conical baffle 42 and the inner conical baffle 43 is arranged in a cone shape to form an air flow barrier, which can effectively block spatter and will not affect the flow of carbon dioxide protective gas. When exhaust gas is generated, the exhaust gas at this time will pass through the small hole 44 on the inner conical baffle 43 and enter the inside of the mounting sleeve 40, and then the exhaust gas will be discharged through the exhaust pipe 46 and finally enter the exhaust frame 47, and then it can be discharged after treatment. This not only improves the welding efficiency, but also greatly reduces environmental pollution, ensures the safety and health of operators, and further optimizes the overall performance of the welding process.

[0035] like Fig.12 As shown, the fume treatment component is installed on the welding machine body 2 and is used to collect the exhaust gas generated during welding. The fume treatment component includes an exhaust fan 50, a mounting groove 51 and a plate filter element 52. The exhaust fan 50 is fixedly installed at the outlet end of the exhaust frame 47. A plurality of mounting grooves 51 are equidistantly provided inside the exhaust frame 47. A plate filter element 52 can be detachably installed inside each mounting groove 51.

[0036] Specifically, when treating the exhaust gas, the plate filter element 52 is inserted into the installation groove 51, and the plate filter element 52 is fixed, and the exhaust fan 50 is started to form a negative pressure area in the exhaust frame 47. After the exhaust gas enters the exhaust frame 47, it is effectively filtered by the plate filter element 52 and then discharged.

[0037] To sum up, when welding the frame of a semi-trailer, first push the mobile frame 1, move the welding machine body 2 to the working position, then install the hose 34 on the joint 5, and then the welding wire needs to be installed. At this time, rotate the rotating frame 7 to a certain angle, and place the welding wire reel 11 wound with the welding wire between the two sliding frames 8 on the rotating frame 7. At this time, start the two first electric cylinders 10, and the first electric cylinder 10 pushes the sliding frame 8, thereby pushing the docking block 9 to move until the docking block 9 is connected to the welding wire reel 11, and then move the rotating frame 7 back to the working position.

[0038] After the wire reel 11 is installed, the welding wire is passed through the guide bucket 14 to be fed between the wire feed roller 13 and the wire pressing wheel 22. The welding wire is then fed into the wire feed tube 15 through the guide frame 16 and enters the hose 34 through the joint 5. The wire pressing frame 21 is then pushed to drive the wire pressing wheel 22 to move downward until the wire pressing wheel 22 contacts the welding wire. At this time, the positioning grooves 23 at both ends of the wire pressing frame 21 are at the positions of the positioning blocks 25. The positioning blocks 25 are pushed into the positioning grooves 23 under the action of the springs 24, which can fix the position of the wire pressing frame 21. The welding wire can be clamped by the settings of the wire pressing wheel 22 and the wire feed roller 13. When the welding wire needs to be fed into the welding position, the electric The motor 19 drives the driving gear 18 to rotate, and the driving gear 18 drives the two driven gears 17 to rotate at the same time, thereby driving the two wire feeding rollers 13 to rotate in the opposite direction at the same time, and the welding wire can be sent to the welding position with the cooperation of the wire pressing wheel 22, and then the black grounding wire at the output end of the welding machine body is connected to the welding workpiece, the red electrode wire at the output end of the welding machine is connected to the welding assembly, the input power is correctly wired, and the input end plug is connected to the input port of the welding machine body, and then according to the thickness and type of the welding material, the appropriate current and voltage are selected, and the wire feeding speed and the gas flow of carbon dioxide are adjusted, and the frame can be started to be welded.

[0039] During the welding process, it is also necessary to release the carbon dioxide shielding gas at the welding position. First, place the gas cylinder 26 on both sides of the mounting frame 4, and then install the strap 27, so that the gas cylinder 26 can be fixed on the mounting frame 4, and the gas outlet of the gas cylinder 26 is connected to the corresponding one-way valve 31, and then open the gas cylinder 26 valve to allow the carbon dioxide in the gas cylinder 26 to enter the one-way valve 31, and the carbon dioxide enters the connecting pipe 29 through the one-way valve 31. In actual operation, first open one of the valves 30 to supply the shielding gas, and through the setting of the welding gas source regulator 32, the flow rate is detected and controlled. When one gas cylinder 26 is insufficiently supplied, the corresponding valve 30 can be closed, and then the other valve 30 can be opened to allow the other gas cylinder 26 to continue to supply the shielding gas, ensuring that the shielding gas is uninterrupted, thereby ensuring the welding quality. Through this alternating supply method of the double gas cylinders 26, not only the welding efficiency is improved, but also the use time of the equipment is extended. The operator can flexibly adjust the gas source according to the actual welding needs to ensure the continuity and stability of the shielding gas during the welding process.

[0040] During welding, hold the handle 35, adjust the welding nozzle 37 to align with the weld, start the welding machine, and the current is transmitted to the welding nozzle 37 through the wire to generate a high-temperature arc. At the same time, the welding wire is evenly moved out to melt the welding wire. At the same time, the protective gas evenly covers the weld to prevent oxidation and ensure the quality of the weld. By accurately controlling the coordination of the arc and the welding wire, the welding process is more stable.

[0041] During the welding process, the blower 49 is turned on, and the blower 49 sends air into the shell 48. The air entering the shell 48 will enter the inside of the connecting sleeve 41 through the air inlet pipe 45. The air entering the connecting sleeve 41 will enter the gap between the outer conical baffle 42 and the inner conical baffle 43 through the small hole 44. The gap between the outer conical baffle 42 and the inner conical baffle 43 is arranged in a conical shape to form an airflow barrier, which can effectively block splashes and will not affect the flow of carbon dioxide protective gas. When exhaust gas is generated, the exhaust gas at this time will pass through the inner conical baffle 43. The exhaust gas passes through the small hole 44 on the exhaust pipe 44 to enter the interior of the installation sleeve 40, and then the exhaust gas is discharged through the exhaust pipe 46 and finally enters the exhaust frame 47. During use, the plate filter element 52 is inserted into the installation groove 51, and the plate filter element 52 is fixed, and the exhaust fan 50 is started to form a negative pressure area in the exhaust frame 47. After the exhaust gas enters the exhaust frame 47, it is effectively filtered by the plate filter element 52 and then discharged. This not only improves the welding efficiency, but also greatly reduces environmental pollution, ensures the safety and health of the operators, and further optimizes the overall performance of the welding process.

[0042] Embodiment 2: Based on a safety protection type carbon dioxide shielded welding machine for a semi-trailer frame, this embodiment 2 also proposes a safety protection type carbon dioxide shielded welding method for a semi-trailer frame, comprising the following steps: The first step is to move, push the moving frame 1, move the welding machine body 2 to the working position, and then install the hose 34 on the joint 5; The second step is installation. The rotating frame 7 is rotated to a certain angle, and the welding wire reel 11 wound with welding wire is placed between the two sliding frames 8 on the rotating frame 7. At this time, the two first electric cylinders 10 are started. The first electric cylinders 10 push the sliding frames 8, thereby pushing the docking block 9 to move until the docking block 9 is connected to the welding wire reel 11, and then the rotating frame 7 is moved back to the working position; The third step is to thread the wire. The welding wire is passed through the guide bucket 14, and then the welding wire is fed between the wire feeding roller 13 and the wire pressing wheel 22. Then the welding wire is passed through the guide frame 16 and fed into the wire feeding tube 15, and enters the hose 34 through the connector 5; The fourth step is to clamp the wire. Push the wire pressing frame 21 to drive the wire pressing wheel 22 to move downward until the wire pressing wheel 22 contacts the welding wire. At this time, the positioning grooves 23 at both ends of the wire pressing frame 21 are at the positions of the positioning blocks 25. The positioning blocks 25 are pushed into the positioning grooves 23 under the action of the springs 24, so that the position of the wire pressing frame 21 can be fixed. The welding wire can be clamped by the arrangement of the wire pressing wheel 22 and the wire feeding roller 13. The fifth step is to feed the wire. The motor 19 is started. The motor 19 drives the driving gear 18 to rotate. The driving gear 18 drives the two driven gears 17 to rotate at the same time, thereby driving the two wire feeding rollers 13 to rotate in the opposite direction at the same time, and the welding wire can be fed to the welding position with the cooperation of the wire pressing wheel 22. The sixth step is adjustment. According to the thickness and type of welding materials, select the appropriate current and voltage, and adjust the wire feeding speed and carbon dioxide gas flow rate; Step 7: Installation: Place the gas cylinder 26 on both sides of the mounting frame 4, then install the strap 27, fix the gas cylinder 26 on the mounting frame 4, and connect the gas outlet of the gas cylinder 26 with the corresponding one-way valve 31, then open the valve of the gas cylinder 26, so that the carbon dioxide in the gas cylinder 26 enters the one-way valve 31, and the carbon dioxide enters the inside of the connecting pipe 29 through the one-way valve 31; The eighth step is to supply gas. First, open one of the valves 30 to supply the shielding gas. The flow rate is detected and controlled by setting the welding gas source regulator 32. When one gas cylinder 26 is insufficiently supplied, the corresponding valve 30 can be closed, and then the other valve 30 can be opened to allow the other gas cylinder 26 to continue to supply the shielding gas, thereby ensuring that the shielding gas is uninterrupted and thus ensuring the welding quality. By means of this alternating supply of two gas cylinders 26, not only the welding efficiency is improved, but also the service life of the equipment is extended. The operator can flexibly adjust the gas source according to the actual welding needs to ensure the continuity and stability of the shielding gas during the welding process. The ninth step is welding. Hold the handle 35, adjust the welding nozzle 37 to align with the weld, start the welding machine, and the current is transmitted to the welding nozzle 37 through the wire to generate a high-temperature arc. At the same time, the welding wire is evenly moved out to melt the welding wire. At the same time, the protective gas evenly covers the weld to prevent oxidation and ensure the quality of the weld. By accurately controlling the coordination of the arc and the welding wire, the welding process is more stable. The tenth step is to prevent splashing. The blower 49 is turned on. The blower 49 sends air into the housing 48. The air entering the housing 48 will enter the interior of the connecting sleeve 41 through the air inlet pipe 45. The air entering the connecting sleeve 41 will enter the gap between the outer conical baffle 42 and the inner conical baffle 43 through the small hole 44. The gap between the outer conical baffle 42 and the inner conical baffle 43 is arranged in a conical shape to form an airflow barrier, which can effectively block splashing and will not affect the flow of carbon dioxide protective gas. The eleventh step is waste gas treatment. When waste gas is generated, the waste gas will pass through the small hole 44 on the inner conical baffle 43 and enter the interior of the mounting sleeve 40. Then the waste gas will be discharged through the exhaust pipe 46 and finally enter the exhaust frame 47. During use, insert the plate filter element 52 into the mounting groove 51, and fix the plate filter element 52. Start the exhaust fan 50 to form a negative pressure area in the exhaust frame 47. After the waste gas enters the exhaust frame 47, it is effectively filtered by the plate filter element 52 and then discharged. This not only improves the welding efficiency, but also greatly reduces environmental pollution, ensures the safety and health of operators, and further optimizes the overall performance of the welding process.

[0043] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A safety protection type carbon dioxide shielded welding machine for a semi-trailer frame, comprising a mobile frame (1), a welding machine body (2) being mounted on the mobile frame (1), and a control panel (3) being mounted on the welding machine body (2), characterized in that: Also includes: Wherein, a wire feeding cavity is provided in the welding machine body (2); A wire feeding assembly, the wire feeding assembly being installed inside the wire feeding cavity and used for placing and feeding welding wire during welding; A mounting frame (4), the mounting frame (4) being fixedly mounted on the mobile frame (1), and the mounting frame (4) being located at the rear side of the welding machine body (2); A gas supply assembly, the gas supply assembly being mounted on the mounting frame (4) and being used to supply shielding gas during welding; A joint (5), the joint (5) being fixedly mounted on the welding machine body (2); A welding assembly, which is mounted on the end of the joint (5) and is used for welding; A splash slag blocking assembly, which is installed on the welding assembly and is used to block splashes that occur during welding; A fume treatment component is installed on the welding machine body (2) and is used to collect waste gas generated during welding.

2. A safety protection type carbon dioxide shielded welding machine for a semitrailer frame according to claim 1, characterized in that: The wire feeding assembly comprises: A rotating frame (7), the rotating frame (7) being rotatably mounted inside the wire feeding chamber; A sliding frame (8), two sliding frames (8) being symmetrically and slidably mounted on the rotating frame (7); A docking block (9), the docking block (9) being rotatably mounted on both of the two sliding frames (8); A first electric cylinder (10), two of which are symmetrically and fixedly mounted on the rotating frame (7), and an output end of the first electric cylinder (10) is fixedly connected to the sliding frame (8); A welding wire reel (11), the rotating frame (7) being provided with the welding wire reel (11), and two ends of the welding wire reel (11) being respectively adapted to the docking block (9); A wire feeding unit is installed inside the wire feeding cavity and is used to feed the welding wire into the welding position.

3. A safety protection type carbon dioxide shielded welding machine for a semitrailer frame according to claim 2, characterized in that: The wire feeding unit comprises: A wire feeding frame (12), the wire feeding frame (12) being fixedly mounted inside the wire feeding chamber, the wire feeding frame (12) being located between the rotating frame (7) and the joint (5); A wire feeding roller (13), wherein two wire feeding rollers (13) are symmetrically and rotatably mounted on the wire feeding frame (12); A guide bucket (14), the guide bucket (14) being fixedly mounted on one end of the wire feeding frame (12) close to the rotating frame (7); A wire feeding tube (15), the wire feeding tube (15) being fixedly mounted between the wire feeding frame (12) and the joint (5), the wire feeding tube (15) being coaxially arranged with the guide bucket (14); A guide frame (16), wherein the guide frame (16) is fixedly mounted on an entrance end of the wire feeding tube (15); Driven gears (17), two driven gears (17) being rotatably mounted inside the wire feeding frame (12), and the two driven gears (17) being fixedly connected to the ends of the two wire feeding rollers (13) respectively; A driving gear (18), the driving gear (18) being rotatably mounted inside the wire feeding frame (12), the driving gear (18) being meshed with the two driven gears (17) respectively; A motor (19), wherein the motor (19) is fixedly mounted on the wire feeding frame (12), and an output end of the motor (19) is fixedly connected to the driving gear (18).

4. A safety protection type carbon dioxide shielded welding machine for a semitrailer frame according to claim 3, characterized in that: Also includes: A positioning frame (20), two of the positioning frames (20) being symmetrically and fixedly mounted on the wire feeding frame (12); A wire pressing frame (21), the wire pressing frame (21) being slidably mounted between the two positioning frames (20); A wire pressing wheel (22), wherein two wire pressing wheels (22) are rotatably mounted at the bottom of the wire pressing frame (21), and the two wire pressing wheels (22) correspond to the wire feeding roller (13); Positioning grooves (23), both ends of the wire pressing frame (21) are fixedly provided with the positioning grooves (23); A spring (24), the spring (24) being fixedly mounted on each of the two positioning frames (20); A positioning block (25) is fixedly mounted on each of the two springs (24), and the positioning block (25) is adapted to fit the positioning groove (23).

5. A safety protection type carbon dioxide shielded welding machine for a semitrailer frame according to claim 4, characterized in that: The air supply assembly comprises: Gas cylinders (26), with the gas cylinders (26) being arranged on both sides of the mounting frame (4); A binding belt (27), wherein the binding belt (27) is detachably provided on both sides of the mounting frame (4), and the inner side of the binding belt (27) is in contact with the gas cylinder (26); A tee (28), the tee (28) being fixedly mounted on the mounting frame (4); A connecting pipe (29), wherein two connecting pipes (29) are connected to the tee (28); Valves (30), where the two connecting pipes (29) are connected to the three-way connection (28), two valves (30) are fixedly installed; A one-way valve (31), wherein the two connecting pipes (29) are both connected to the one-way valve (31), and the one-way valve (31) is detachably connected to the output end of the gas cylinder (26). A welding gas source regulator (32), wherein an input end of the welding gas source regulator (32) is connected to the tee (28); An exhaust pipe (33), the exhaust pipe (33) being fixedly mounted inside the wire feeding chamber, the exhaust end of the exhaust pipe (33) being in communication with the joint (5), and the intake end of the exhaust pipe (33) being in communication with the output end of the welding gas source regulator (32).

6. A safety protection type carbon dioxide shielded welding machine for a semi-trailer frame according to claim 5, wherein the welding assembly comprises a hose (34), one end of the hose (34) is detachably connected to the joint (5), and the other end of the hose (34) is fixedly mounted with a welding gun body, wherein the welding gun body consists of a handle (35), a gun barrel (36) and a welding nozzle (37), and is characterized in that: Also includes: a housing (38), the housing (38) being fixedly mounted on the handle (35); A clamp ring (39), wherein a plurality of the clamp rings (39) are fixedly mounted at equal distances on the gun barrel (36) and the hose (34).

7. A safety protection type carbon dioxide shielded welding machine for a semitrailer frame according to claim 6, characterized in that: The splash slag blocking assembly comprises: A mounting sleeve (40), the mounting sleeve (40) being fixedly mounted on the gun barrel (36); A connecting sleeve (41), wherein the connecting sleeve (41) is fixedly mounted on the mounting sleeve (40); An outer conical retaining frame (42), the outer conical retaining frame (42) being fixedly mounted on the bottom of the connecting sleeve (41); An inner conical retaining frame (43), the inner conical retaining frame (43) being fixedly mounted on the bottom of the mounting sleeve (40); Small holes (44), a plurality of small holes (44) are provided on the outer conical retaining frame (42) and the inner conical retaining frame (43) at equal angles in a circular shape.

8. A safety protection type carbon dioxide shielded welding machine for a semitrailer frame according to claim 7, characterized in that: Also includes: An air intake pipe (45), wherein the air intake pipe (45) is fixedly mounted between the plurality of clamp rings (39), the air intake pipe (45) is fixedly connected to the housing (38), and an output end of the air intake pipe (45) is in communication with the connecting sleeve (41); An air outlet pipe (46), wherein the air outlet pipe (46) is fixedly installed between the plurality of clamp rings (39), the air outlet pipe (46) is fixedly connected to the outer shell (38), and the input end of the air outlet pipe (46) is in communication with the mounting sleeve (40); An exhaust frame (47), the exhaust frame (47) being fixedly mounted on the top of the welding machine body (2), the output end of the exhaust pipe (46) being in communication with the air inlet end of the exhaust frame (47); A shell (48), the shell (48) being fixedly mounted on the top of the exhaust frame (47), and the input end of the air intake pipe (45) being in communication with the shell (48); A blower (49), wherein an output end of the blower (49) is in communication with the exhaust frame (47).

9. A safety protection type carbon dioxide shielded welding machine for a semitrailer frame according to claim 8, characterized in that: The flue gas treatment component comprises: an exhaust fan (50), the exhaust fan (50) being fixedly mounted on an air outlet end of the exhaust frame (47); Mounting grooves (51), a plurality of mounting grooves (51) are provided at equal intervals inside the exhaust frame (47): A plate-type filter core (52), wherein the plate-type filter core (52) is detachably mounted inside each of the mounting grooves (51).

10. A safety protection type carbon dioxide shielded welding method for a semi-trailer frame, using a safety protection type carbon dioxide shielded welding machine for a semi-trailer frame as claimed in claim 9, characterized in that: The following steps are involved: S1, moving, pushing the moving frame (1), moving the welding machine body (2) to the working position, and then installing the hose (34) on the joint (5); S2, installation, rotating the rotating frame (7) to a certain angle, placing the welding wire reel (11) wound with welding wire between the two sliding frames (8) on the rotating frame (7), and then starting the two first electric cylinders (10), the first electric cylinders (10) push the sliding frames (8), thereby pushing the docking block (9) to move until the docking block (9) is connected to the welding wire reel (11); S3, threading the wire, passing the welding wire through the guide bucket (14), and then feeding the welding wire between the wire feeding roller (13) and the wire pressing wheel (22), and then passing the welding wire through the guide frame (16) into the wire feeding tube (15), and then entering the hose (34) through the joint (5); S4, clamping the wire, pushing the wire pressing frame (21) to drive the wire pressing wheel (22) to move downward until the wire pressing wheel (22) contacts the welding wire, at which time the positioning grooves (23) at both ends of the wire pressing frame (21) are at the positions of the positioning blocks (25), and the positioning blocks (25) are pushed into the positioning grooves (23) under the action of the springs (24), thereby fixing the position of the wire pressing frame (21), and clamping the welding wire through the arrangement of the wire pressing wheel (22) and the wire feeding roller (13); S5, wire feeding, starting the motor (19), the motor (19) drives the driving gear (18) to rotate, the driving gear (18) drives the two driven gears (17) to rotate simultaneously, thereby driving the two wire feeding rollers (13) to rotate in opposite directions simultaneously, so that the welding wire can be fed to the welding position with the cooperation of the wire pressing wheel (22); S6. Adjustment: select the appropriate current and voltage according to the thickness and type of welding materials, and adjust the wire feeding speed and carbon dioxide gas flow rate; S7, installation, placing the gas cylinder (26) on both sides of the mounting frame (4), and then installing the strap (27), so that the gas cylinder (26) can be fixed on the mounting frame (4), and the gas outlet of the gas cylinder (26) is connected to the corresponding one-way valve (31), and then the valve of the gas cylinder (26) is opened to allow the carbon dioxide in the gas cylinder (26) to enter the one-way valve (31), and the carbon dioxide enters the inside of the connecting pipe (29) through the one-way valve (31); S8, supplying gas, first opening one of the valves (30) to supply the shielding gas, and detecting and controlling the flow rate by setting the welding gas source regulator (32). When the supply of one gas cylinder (26) is insufficient, the corresponding valve (30) can be closed, and then the other valve (30) can be opened to allow the other gas cylinder (26) to continue to supply the shielding gas; S9, welding, holding the handle (35), adjusting the welding nozzle (37) to align with the weld, starting the welding machine, transmitting the current to the welding nozzle (37) through the wire, generating a high-temperature arc, and at the same time, the welding wire is evenly moved out to melt the welding wire; S10, to prevent splashing, the blower (49) is turned on, and the blower (49) sends air into the housing (48). The air entering the housing (48) enters the interior of the connecting sleeve (41) through the air inlet pipe (45), and the air entering the connecting sleeve (41) enters the gap between the outer conical baffle (42) and the inner conical baffle (43) through the small hole (44). The gap between the outer conical baffle (42) and the inner conical baffle (43) is arranged in a conical shape to form an airflow barrier to prevent splashing; S11, waste gas treatment, when waste gas is generated, the waste gas will pass through the small hole (44) on the inner conical retaining frame (43) and enter the interior of the mounting sleeve (40), and then the waste gas will be discharged through the outlet pipe (46), and finally enter the exhaust frame (47), and be effectively filtered by the plate filter element (52), and then be discharged.

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