Inverter type gas shielded welding machine for steel structure

Abstract

The application discloses a steel structure inverter gas shield welding machine, and relates to the technical field of welding equipment. In view of the problem that the existing steel structure inverter gas shield welding machine is poor in arc striking quality and arc collecting and sticking due to welding wire shaking during starting and stopping, the following scheme is provided, which comprises a welding host, an installation frame is fixedly connected to the outside of the welding host, a wire winding wheel is arranged on the installation frame, a welding wire is arranged on the wire winding wheel, and one end of the welding wire, which is away from the wire winding wheel, is located outside the installation frame. The steel structure inverter gas shield welding machine can eliminate the rigid impact of the welding wire during starting, realize soft starting and avoid the phenomenon of explosion breaking during the arc striking stage of welding, so that the arc striking success rate is significantly improved in the scene of high-frequency spot welding and robot automatic welding, and the welding wire end head is accurately kept at the outlet position of the conducting nozzle of the welding gun during the arc collecting stage, so that the conducting nozzle is prevented from being burned or the wire feeding is prevented from being stuck due to the welding wire retraction during the next arc striking.

Description

Technical Field

[0001] This invention relates to the field of welding equipment technology, and in particular to an inverter-type gas shielded welding machine for steel structures. Background Technology

[0002] In the manufacturing industry of metal cutting and welding equipment such as automatic and semi-automatic electric arc and plasma arc welding machines, inverter gas shielded welding is a welding method based on inverter technology. It converts industrial frequency electricity into medium and high frequency AC electricity and outputs it through a small transformer. Compared with traditional welding machines, it is smaller in size, lighter in weight, more energy-efficient, and has a very fast dynamic response. This ensures easy arc ignition, stable arc, and less spatter. It is often used for high-precision welding of carbon steel, stainless steel, and aluminum alloys.

[0003] In the process of welding steel structural components using an inverter gas shielded welding machine, when the welder pulls the welding torch switch, the control logic of a traditional welding machine is that the wire feed motor starts at full speed instantaneously. Due to the rigid impact caused by the instantaneous start and stop, the welding wire, in a high-speed state, violently impacts the welding area during the arc initiation stage, causing wire breakage. During the arc termination stage, when the wire feed motor suddenly brakes and stops, the welding wire in the hose, due to its own elasticity and the bending deformation of the hose, generates a backward rebound force, causing the welding wire to be pulled back. The molten droplets remaining at the end of the welding wire will stick to the contact tip, resulting in wire sticking. This greatly affects the welding quality and reduces the service life of the welding machine. Summary of the Invention

[0004] This invention discloses an inverter-type gas shielded welding machine for steel structures, aiming to solve the technical problems of poor arc ignition quality and wire sticking during arc termination caused by wire vibration during start-up and shutdown in existing inverter-type gas shielded welding machines for steel structures.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: An inverter-type gas shielded welding machine for steel structures includes a welding main unit. A mounting frame is fixedly connected to the outside of the welding main unit. A wire winding wheel is mounted on the mounting frame, and a welding wire is mounted on the wire winding wheel. The end of the welding wire away from the wire winding wheel is located outside the mounting frame, and a wire feeding mechanism is provided outside the welding wire. A cleaning module is provided on the wire feeding mechanism. A wire outlet connector is provided outside the welding wire, located on the wire feeding mechanism. A flexible hose is provided outside the wire feeding mechanism, and a welding torch is mounted at the end of the flexible hose away from the wire outlet connector. A wire feeding buffer and shock absorption module is provided outside the welding wire, located inside the flexible hose. The wire feeding buffer and shock absorption module includes a housing, the outer side of which is connected to the inner wall of the wire outlet connector. The floating guide sleeve is located inside the outer casing via an external threaded connection. The floating guide sleeve is positioned outside the welding wire. A collar is fixedly connected to the outside of the floating guide sleeve. Two symmetrical grooves are formed on the outside of the collar, each containing a limit key. The limit keys are fixedly connected to the inner wall of the outer casing. A Teflon sealing ring is slidably connected to the outside of the floating guide sleeve and is fixedly connected to the side of the outer casing away from the cable outlet. A return spring surrounds the outside of the floating guide sleeve, with one end of the return spring near the Teflon sealing ring fixedly connected to the outside of the Teflon sealing ring. A fixed ring is fixedly connected to the outside of the floating guide sleeve, with the return spring located between the Teflon sealing ring and the fixed ring.

[0006] In a preferred embodiment, a movable ring is slidably connected to the inner wall of the outer shell. The inner wall of the movable ring is slidably connected to the outer side of the floating guide sleeve. The end of the return spring away from the Teflon sealing ring is fixedly connected to the outer side of the movable ring. An annular airbag surrounds the outer side of the floating guide sleeve. The annular airbag is fixedly connected to the outer side of the movable ring. A positioning ring is fixedly connected to the inner wall of the outer shell. The positioning ring is located outside the floating guide sleeve, and the annular airbag is fixedly connected to the outer side of the positioning ring. The positioning ring has two symmetrical circular holes, each containing a fixed air tube. One end of each air tube communicates with the annular airbag, and the other end is fixedly connected to a cylindrical airbag. The fixed ring... The external fixed connection has two symmetrical bosses. The exterior of each boss is fixedly connected to the side of the cylindrical airbag on the same side away from the air duct. A bracket is fixedly connected to the exterior of each air duct, and the bracket is fixedly connected to the opposite side of the positioning ring and the opposite side of the cylindrical airbag. Guide covers are slidably connected to the exterior of both cylindrical airbags. The inner walls of the guide covers are slidably connected to the exterior of the bosses, and the guide covers are fixedly connected to the opposite side of the brackets. A conical sleeve is provided on the exterior of each air duct, and multiple circumferentially equidistant slits are opened on the conical sleeve. An annular component is slidably connected to the exterior of each conical sleeve, and the side of the annular component near the positioning ring is fixed. The device is connected to an arc-shaped pin, with a pusher inserted into the outside of each arc-shaped pin. The pushers are aligned with the opposite side of the ring-shaped component and are located outside the conical sleeve. The positioning ring has two symmetrical small holes, each with an adjusting bolt movably connected to its inner wall. Each pusher has a circular opening, the inner wall of which is rotatably connected to the outside of the arc-shaped pin on the same side via an external thread. The outer casing has two symmetrical slots near the cable outlet, each containing an adjusting screw and a smoothing rod. The floating guide sleeve has two symmetrical slots near the slots, their inner walls slidably connected to the outside of the adjusting screw and smoothing rod, respectively. The outer casing also has a... The deep groove is located outside the adjusting screw. A mounting ring is fixedly connected to the end of the adjusting screw away from the floating guide sleeve. The mounting ring has multiple circumferentially equidistant slots. A constraint sleeve is rotatably connected to the outside of the adjusting screw via an external thread. The constraint sleeve is fixedly connected to the opposite side of the deep groove's inner surface. An outer ring is slidably connected to the outside of the constraint sleeve. The same push spring is fixedly connected to the opposite side of the outer ring's outer surface. Two symmetrical guide rails are slidably connected to the outside of the outer ring. Each guide rail is fixedly connected to the opposite side of the deep groove's inner wall. Multiple circumferentially equidistant limit clips are fixedly connected to the inner wall of the slots on the inner wall of the outer ring. The outer surfaces of the limit clips engage with the inner walls of the slots.

[0007] In a preferred embodiment, the cleaning module includes a dust cover. Two symmetrical guide rollers are mounted on the wire feeding mechanism. The dust cover is located outside the two guide rollers. Two symmetrical short shafts are fixedly connected to the inner wall of the dust cover. Brushes are movably connected to the outside of each short shaft. The outside of each brush contacts the outside of the guide roller on the same side. A torsion spring is mounted on the outside of each short shaft. One end of each torsion spring is fixedly connected to the outside of the short shaft on the same side, and the other end is fixedly connected to the outside of the brush on the same side. A storage box is fixedly connected to the bottom inner wall of the dust cover. A narrow opening is provided on the upper side of the storage box. A three-way pipe is fixedly connected to the inner wall of the narrow opening, and the three-way pipe is located away from the storage box. Both ends are fixedly connected to drip connectors, and the exterior of each drip connector is fixedly connected to the exterior of the brush on the same side. A pump is fixedly connected to the upper side of the storage tank, and the output end of the pump is connected to a three-way pipe through a round pipe. Two symmetrical motors are fixedly connected to the upper side of the storage tank, and the output ends of each motor are connected to cams through couplings. The exterior of each cam contacts the exterior of the brush on the same side. A support frame is provided on the exterior of each guide wheel, and the bottom of each support frame is fixedly connected to the inner wall of the dust cover. A lead screw is provided on each support frame, and a sponge block is movably connected to the end of the lead screw near the guide wheel. The exterior of each sponge block is slidably connected to the inner wall of the dust cover. The blocks are all in contact with the outer opposite sides of the guide wheels; both guide wheels have openings, and fitting cylinders are fixedly connected to the inner walls of the openings; the wire feeding mechanism has two symmetrical drive shafts, and the inner walls of the fitting cylinders each have two symmetrical slots, the inner walls of which are inserted into the outer sides of the drive shafts on the same side; a fixed platform is fixedly connected to the outer side of the drive shafts, and two symmetrical magnets are fixedly connected to the fixed platform and the outer opposite side of the fitting cylinders, with the opposite sides of the two magnets on the same side in contact; both drive shafts have pre-drilled holes on the side away from the wire feeding mechanism, and anti-deviation rings are fixedly connected to the inner walls of the pre-drilled holes, with anti-deviation rings inserted into the pre-drilled holes. There are locking pins, and each locking pin has an annular groove on its outside. Two symmetrical elastic springs are engaged in each annular groove. The outer side of each elastic spring is fixedly connected to the inner wall of the reserved hole. The drive shaft and the anti-deviation ring each have two symmetrical rectangular grooves. Locking blocks are slidably connected in each rectangular groove. The outer side of each locking block is engaged with the outer side of the fitting cylinder on the same side. Each locking block has a narrow groove. A flat rod is slidably connected in each narrow groove. The outer side of each flat rod is fixedly connected to the inner wall of the rectangular groove on the same side. A tension spring is provided in the inner wall of each narrow groove. One end of each tension spring is fixedly connected to the inner wall of the narrow groove, and the other end is fixedly connected to the outer side of the flat rod on the same side.

[0008] As can be seen from the above, the inverter-type gas shielded welding machine for steel structures provided by the present invention can eliminate the rigid impact when the welding wire starts during the arc ignition stage, realize soft start, and avoid the phenomenon of burst breakage. This significantly improves the arc ignition success rate in high-frequency spot welding and robotic automated welding scenarios. During the arc termination stage, it ensures that the welding wire tip is accurately positioned at the outlet of the contact tip on the welding torch, avoiding contact tip burnout or wire feeding jamming caused by welding wire retraction during the next arc ignition, thus preventing contact tip blockage. This significantly improves the stability of welding and extends the service life of the welding machine. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the overall structure of an inverter-type gas shielded welding machine for steel structures proposed in this invention.

[0010] Figure 2 This is a schematic diagram of the mounting frame structure for an inverter-type gas shielded welding machine for steel structures proposed in this invention.

[0011] Figure 3 This is a schematic diagram of the wire feeding buffer and shock absorption module of an inverter gas shielded welding machine for steel structures proposed in this invention.

[0012] Figure 4 This is a schematic diagram of the outer shell structure of an inverter-type gas shielded welding machine for steel structures proposed in this invention.

[0013] Figure 5 This is a schematic diagram of the floating guide sleeve structure of an inverter gas shielded welding machine for steel structures proposed in this invention.

[0014] Figure 6 This is a schematic diagram of the positioning ring structure of an inverter-type gas shielded welding machine for steel structures proposed in this invention.

[0015] Figure 7 This is a schematic diagram of the support structure of an inverter-type gas shielded welding machine for steel structures proposed in this invention.

[0016] Figure 8 This is a schematic diagram of the constraint sleeve structure of an inverter gas shielded welding machine for steel structures proposed in this invention.

[0017] Figure 9 This is a schematic diagram of the cleaning module structure of an inverter-type gas shielded welding machine for steel structures proposed in this invention.

[0018] Figure 10 This is a schematic diagram of the fitting cylinder structure of an inverter gas shielded welding machine for steel structures proposed in this invention.

[0019] Figure 11 This is a schematic diagram of the drive shaft structure of an inverter-type gas shielded welding machine for steel structures proposed in this invention.

[0020] Figure 12 This is a schematic diagram of the dust cover structure of an inverter gas shielded welding machine for steel structures proposed in this invention.

[0021] In the diagram: 1. Welding host; 2. Mounting frame; 3. Welding wire; 4. Wire feeding mechanism; 5. Hose; 6. Welding torch; 7. Wire winding wheel; 8. Wire feeding buffer and shock absorption module; 801. Housing; 802. Floating guide sleeve; 803. Collar; 804. Slide groove; 805. Limit key; 806. Return spring; 807. Fixed ring; 808. Adjusting screw; 809. Smooth rod; 810. Teflon sealing ring; 811. Moving ring; 812. Annular airbag; 813. Positioning ring; 814. Air guide tube; 815. Bracket; 816. Columnar airbag; 817. Guide cover; 818. Conical sleeve; 819. Cutout; 820. Annular component; 821. Pushing component; 822. Arc pin; 823. Adjusting bolt; 9. Cleaning module; 901. Dust cover; 902. Fitting cylinder; 903. Groove; 904. Magnet; 905. Drive shaft; 906. Fixing platform; 907. Anti-deviation ring; 908. Locking pin; 909. Elastic spring; 910. Annular groove; 911. Locking block; 912. Flat rod; 913. Tension spring; 914. Torsion spring; 915. Brush; 916. Storage box; 917. T-pipe; 918. Pump; 919. Electric motor; 920. Cam; 921. Stand; 922. Lead screw; 923. Sponge block; 924. Drip connector; 10. Outlet connector; 11. Mounting ring; 12. Bayonet; 13. Constraint sleeve; 14. Push spring; 15. External ring; 16. Guide rail; 17. Limiting clip; 18. Guide wheel. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0023] The present invention discloses an inverter-type gas shielded welding machine for steel structures, which is mainly applied to scenarios where the welding wire vibrates during the start-up and shutdown of existing inverter-type gas shielded welding machines for steel structures, resulting in poor arc ignition quality and wire sticking during arc termination.

[0024] Reference Figures 1-12An inverter-type gas shielded welding machine for steel structures includes a welding host 1. A mounting frame 2 is bolted to the outside of the welding host 1. A wire winding wheel 7 is mounted on the mounting frame 2, and a welding wire 3 is mounted on the wire winding wheel 7. The end of the welding wire 3 away from the wire winding wheel 7 is located outside the mounting frame 2, and a wire feeding mechanism 4 is located outside the welding wire 3. A cleaning module 9 is mounted on the wire feeding mechanism 4, and a wire outlet connector 10 is located outside the welding wire 3. The wire outlet connector 10 is located on the wire feeding mechanism 4, and a flexible hose 5 is located outside the wire feeding mechanism 4. A welding torch 6 is located at the end of the flexible hose 5 away from the wire outlet connector 10, and a wire feeding buffer and shock absorption module 8 is located outside the welding wire 3, inside the flexible hose 5. The wire feeding buffer and shock absorption module 8 includes a housing 801, the outside of which is rotatably connected to the inner wall of the wire outlet connector 10 via an external thread. A floating guide sleeve 8 is located inside the housing 801. 02. The floating guide sleeve 802 is located outside the welding wire 3. A collar 803 is bolted to the outside of the floating guide sleeve 802. Two symmetrical sliding grooves 804 are opened on the outside of the collar 803. Limit keys 805 are slidably connected in the sliding grooves 804. The outside of the limit keys 805 is bolted to the inner wall of the outer shell 801. A Teflon sealing ring 810 is slidably connected to the outside of the floating guide sleeve 802. The Teflon sealing ring 810 is bolted to the side of the outer shell 801 away from the outlet connector 10. A return spring 806 surrounds the outside of the floating guide sleeve 802. The end of the return spring 806 near the Teflon sealing ring 810 is bolted to the outside of the Teflon sealing ring 810. A fixed ring 807 is bolted to the outside of the floating guide sleeve 802. The return spring 806 is located between the Teflon sealing ring 810 and the fixed ring 807.

[0025] Specifically, the device utilizes the wire feeding buffer and shock absorption module 8 to eliminate the rigid impact of the welding wire 3 during the arc ignition stage, achieving a soft start and avoiding burst breakage. This significantly improves the arc ignition success rate in high-frequency spot welding and robotic automated welding scenarios. During the arc termination stage, it ensures that the end of the welding wire 3 accurately stops at the outlet position of the conductive tip on the welding torch 6, preventing conductive tip burnout or wire feeding jamming caused by welding wire retraction during the next arc ignition. This avoids conductive tip blockage, significantly improving welding stability and extending the service life of the welding machine.

[0026] Reference Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8In a preferred embodiment, a movable ring 811 is slidably connected to the inner wall of the outer casing 801. The inner wall of the movable ring 811 is slidably connected to the outer side of the floating guide sleeve 802. The end of the return spring 806 away from the Teflon sealing ring 810 is bolted to the outer side of the movable ring 811. An annular airbag 812 surrounds the outer side of the floating guide sleeve 802. The annular airbag 812 is bolted to the outer side of the movable ring 811. A positioning ring 813 is bolted to the inner wall of the outer casing 801. The positioning ring 813 is located outside the floating guide sleeve 802. The outer side of the annular airbag 812 is bolted to the outer side of the positioning ring 813. Bolted connection; the positioning ring 813 has two symmetrical circular holes, each with an air guide tube 814 bolted to it. One end of each air guide tube 814 is connected to the annular airbag 812, and the other end is bolted to the cylindrical airbag 816. The fixing ring 807 has two symmetrical bosses bolted to its exterior. The exterior of each boss is bolted to the side of the cylindrical airbag 816 away from the air guide tube 814 on the same side. A bracket 815 is bolted to the exterior of each air guide tube 814. The bracket 815 is bolted to the opposite side of the positioning ring 813, and the bracket 815 is bolted to the opposite side of the cylindrical airbag 816. Bolted connection; guide covers 817 are slidably connected to the outside of both cylindrical airbags 816. The inner wall of the guide cover 817 is slidably connected to the outside of the boss. The guide cover 817 and the opposite side of the bracket 815 are connected by bolts. A conical sleeve 818 is provided on the outside of each air duct 814. Multiple circumferentially distributed slits 819 are opened on the conical sleeve 818. An annular part 820 is slidably connected to the outside of each conical sleeve 818. An arc-shaped pin 822 is bolted to the side of the annular part 820 near the positioning ring 813. A pusher 821 is inserted into the outside of each arc-shaped pin 822. The pusher 821 is opposite to the annular part 820. Both sides are fitted together, and the pushing parts 821 are all located outside the conical sleeve 818; the positioning ring 813 has two symmetrical small holes, and the inner wall of each small hole is rotatably connected to the adjusting bolt 823 through the bearing; the pushing parts 821 have round openings, and the inner wall of each round opening is rotatably connected to the outer side of the arc-shaped pin 822 on the same side through the external thread; and the outer shell 801 has two symmetrical slots on the side near the cable outlet 10, and the slots are respectively provided with adjusting screw 808 and smooth rod 809; the floating guide sleeve 802 has two symmetrical slots on the side near the slots, and the inner walls of the two slots are slidably connected to the outer side of adjusting screw 808 and smooth rod 809 respectively.A deep groove is formed on the side of the outer casing 801 near the outlet connector 10. The groove is located outside the adjusting screw 808. A mounting ring 11 is bolted to the end of the adjusting screw 808 away from the floating guide sleeve 802. Multiple circumferentially equidistant slots 12 are formed on the mounting ring 11. A constraint sleeve 13 is rotatably connected to the outside of the adjusting screw 808 via an external thread. The side of the constraint sleeve 13 opposite to the inside of the deep groove is bolted to the outside of the constraint sleeve 13. An outer ring 15 is slidably connected to the outside of the constraint sleeve 13. A push spring 14 is bolted to the side of the outer ring 15 opposite to the outside of the constraint sleeve 13. Two symmetrical guide rails 16 are slidably connected to the outside of the outer ring 15. The sides of the guide rails 16 opposite to the inner wall of the deep groove are bolted to the outside of the outer ring 15. Multiple circumferentially equidistant limit clips 17 are bolted to the inner wall of the slots 12.

[0027] In specific application scenarios, the wire feeding buffer and shock absorption module 8 is mainly used for wire feeding buffer and shock absorption modules. That is, the wire feeding buffer and shock absorption module 8 utilizes a three-stage buffer structure consisting of a return spring 806, an annular airbag 812, and a cylindrical airbag 816 to absorb impact energy step by step, making the wire feeding process more stable, improving arc stability, and making the weld formation more uniform. By adjusting the position of the annular part 820 on the conical sleeve 818, the exhaust damping of the cylindrical airbag can be changed, thereby adjusting the buffer stiffness to adapt to welding wires 3 of different diameters and materials. The adjusting screw 808 is fixed by a locking mechanism consisting of a mounting ring 11, a limit card 17, and a push spring 14 to prevent the adjustment parameters from drifting due to welding machine vibration and ensure long-term stability of buffer characteristics.

[0028] Reference Figure 9 , Figure 10 , Figure 11 and Figure 12In a preferred embodiment, the cleaning module 9 includes a dust cover 901. Two symmetrical guide rollers 18 are mounted on the wire feeding mechanism 4. The dust cover 901 is located outside the two guide rollers 18. Two symmetrical short shafts are bolted to the inner wall of the dust cover 901. Brushes 915 are rotatably connected to the outside of each short shaft via bearings. The outside of each brush 915 contacts the outside of the guide roller 18 on the same side. A torsion spring 914 is mounted on the outside of each short shaft. One end of each torsion spring 914 is bolted to the outside of the short shaft on the same side, and the other end is bolted to the outside of the brush 915 on the same side. A storage tank 916 is bolted to the bottom inner wall of the dust cover 901. A narrow opening is provided on the upper side of the storage tank 916, and a three-way pipe 917 is bolted to the inner wall of the opening. Both ends of the three-way pipe 917 away from the storage tank 916 are bolted to drip connectors 924. The exterior of each drip connector 924 is bolted to the exterior of a brush 915 on the same side. A pump 918 is bolted to the upper side of the storage tank 916. The output end of the pump 918 is connected to the three-way pipe 917 via a round pipe. Two symmetrical... The motor 919 has its output end connected to a cam 920 via a coupling. The outer side of each cam 920 contacts the outer side of a brush 915 on the same side. Each guide wheel 18 has a support frame 921 on its outer side. The bottom of each support frame 921 is bolted to the inner wall of the dust cover 901. Each support frame 921 has a lead screw 922. The end of each lead screw 922 near the guide wheel 18 is rotatably connected to a sponge block 923 via a bearing. The outer side of each sponge block 923 is slidably connected to the inner wall of the dust cover 901. The sponge block 923 is opposite to the outer side of the guide wheel 18. Both sides are in contact; both guide wheels 18 have openings, and the inner walls of the openings are connected to fitting cylinders 902 by bolts. The wire feeding mechanism 4 is provided with two symmetrical drive shafts 905. The inner walls of the fitting cylinders 902 are provided with two symmetrical grooves 903. The inner walls of the grooves 903 are inserted into the outside of the drive shafts 905 on the same side. The outside of the drive shafts 905 is connected to a fixed platform 906 by bolts. The fixed platform 906 and the side opposite to the outside of the fitting cylinders 902 are both connected to two symmetrical magnets 904 by bolts. The opposite sides of the two magnets 904 on the same side are in contact.Both drive shafts 905 have pre-drilled holes on the side away from the wire feeding mechanism 4. Anti-deviation rings 907 are bolted to the inner walls of each pre-drilled hole. Locking pins 908 are inserted into each pre-drilled hole, and annular grooves 910 are provided on the outer sides of each locking pin 908. Two symmetrical elastic springs 909 are engaged within each annular groove 910. The outer sides of the elastic springs 909 are bolted to the inner walls of the pre-drilled holes. Both the drive shafts 905 and the anti-deviation rings 907 have two symmetrical rectangular grooves. Each rectangular groove has a locking block 911 slidably connected to it. The exterior of each locking block 911 engages with the exterior of the fitting cylinder 902 on the same side. Each locking block 911 has a narrow groove, and a flat rod 912 is slidably connected to it. The exterior of each flat rod 912 is bolted to the inner wall of the rectangular groove on the same side. Each narrow groove has a tension spring 913 installed on its inner wall. One end of each tension spring 913 is bolted to the inner wall of the narrow groove, and the other end is bolted to the exterior of each flat rod 912 on the same side.

[0029] In specific application scenarios, the cleaning module 9 is mainly used in the cleaning process. The cleaning module 9 uses a brush 915 to stay in contact with the surface of the wire guide wheel under the action of a torsion spring. With the periodic oscillation driven by the cam, it effectively removes iron filings and oil stains accumulated in the groove of the wire guide wheel, avoiding unstable wire feeding or wire slippage caused by wire guide wheel blockage. The sponge block 923 dries the wire before it enters the hose, preventing the cleaning fluid from entering the hose 5 or welding gun 6 with the wire, and preventing welding gun 6 from slipping or welding porosity due to liquid residue. The quick-change structure, which uses a magnet 904 for magnetic positioning and a locking block 911 for snap-fit, allows for quick disassembly and installation of the wire guide wheel 18 without tools, significantly shortening the replacement time and greatly improving equipment maintenance efficiency. The entire cleaning module 9 is integrated into the wire feeding mechanism 4 without adding extra space, and works in conjunction with the wire feeding buffer and shock absorption module 8 to ensure the long-term stable operation of the wire feeding system.

[0030] Working principle: In static standby mode, the wire feeding mechanism 4 is not activated, the welding wire is stationary, and the floating guide sleeve 802 is in the final position, close to the outlet connector 10, under the pre-tightening force of the return spring 806. The end of the welding wire 3 passes through the hose 5 and is suspended inside the welding torch 6. During startup acceleration, the wire feeding mechanism 4 is activated, pushing the welding wire 3 forward with a strong torque. The resistance of the welding wire 3 in the hose 5 increases instantaneously. This forward impact force first acts on the inner wall of the floating guide sleeve 802. When the impact force is greater than the set pre-tightening force on the return spring 806 and the annular air bladder 812, the floating guide sleeve 802 overcomes this force and moves forward. This causes the fixed ring 807 to overcome the air pressure formed by the return spring 806 in the cylindrical air bladder 816, allowing the gas in the cylindrical air bladder 816 to be transported to the annular air bladder 812 through the air guide tube 814. This causes the annular air bladder 812 to expand axially, thereby pushing the movable ring 811 to overcome the elastic force of the return spring 806 and reset the wire. When spring 806 is compressed, the return spring 806 is further compressed, and the instantaneous impact kinetic energy of welding wire 3 is converted into the elastic potential energy of return spring 806 and stored. The forward movement of floating guide sleeve 802 is equivalent to giving welding wire 3 a buffer stroke. When the wire feeding is stable, when the wire feeding speed tends to be stable and welding wire 3 moves forward at a constant speed, the impact force acting on floating guide sleeve 802 disappears or decreases. At this time, the compressed return spring 806 begins to reset, and the air in the annular air bag 812 returns to the columnar air bag 816, pushing floating guide sleeve 802 to move backward, trying to return to the initial position. In this small reciprocating movement process, the device plays the role of absorbing the small vibration of welding wire itself, so that the tension of welding wire 3 entering welding gun 6 remains constant.When deceleration stops, the wire feeding mechanism 4 stops, and the welding wire 3 still tends to move forward due to inertia. At the same time, the welding wire 3 in the hose 5 begins to rebound. At this time, the rear end of the welding wire 3 generates a backward pulling force. This pulling force will cause the floating guide sleeve 802 to tend to move backward. However, since the return spring 806 is always pushing the floating guide sleeve 802 backward, it increases the frictional resistance of the guide tube to the welding wire, which counteracts the rebound force of the welding wire. When it is necessary to adjust the speed at which the gas in the columnar airbag 816 flows to the annular airbag 812, the adjusting bolt 823 is rotated. The adjusting bolt 823 drives the pusher 821. The ring 820 moves on the arc-shaped pin 822, thereby moving on the conical sleeve 818. This causes the ring 820 to tighten or expand the conical sleeve 818. When the buffer force needs to be adjusted, the adjusting screw 808 is rotated, causing the adjusting screw 808 to move forward or backward on the constraint sleeve 13. This allows the floating guide sleeve 802 to change position within the housing 801. After the wire feeding mechanism 4 drives the wire guide wheel 18 to rotate for wire feeding, the motor 919 is started. The motor 919 drives the cam 920 to oscillate periodically, thereby periodically releasing the pressure on the brush 915. The obstruction causes the brush 915 to press firmly against the surface of the wire guide wheel 18 under the torque of the torsion spring 914. The pump 918 is started, delivering the cleaning solution from the storage tank 916 to the drip connector 924, where it drips onto the brush 915, allowing it to fully absorb the cleaning solution. The wire winding wheel 7 is removed from the mounting bracket 2, and the welding wire 3 is disengaged from the wire feeding mechanism 4. The wire feeding mechanism 4 is started, causing the wire guide wheel 18 to idle, allowing the brush 915 to clean the dirt off the surface of the wire guide wheel 18. The lead screw 922 is rotated, guiding the wire guide wheel 18 along the upright bracket 921. The movement allows the sponge block 923 to come into contact with the guide wheel 18, wiping away dirt. When the guide wheel 18 is severely worn, the elastic force of the spring 909 is overcome, and the locking pin 908 is pulled out of the drive shaft 905. The locking block 911, no longer compressed by the locking pin 908, retracts into the drive shaft 905 under the pull of the tension spring 913, thus releasing the locking block 911 from the fitting cylinder 902. Overcoming the elastic force of the magnet 904, the fitting cylinder 902 connected to the guide wheel 18 is pulled out of the drive shaft 905. The process is repeated in reverse to replace the guide wheel 18 with a new one.

[0031] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An inverter-type gas shielded welding machine for steel structures, comprising a welding host (1), characterized in that, The welding host (1) is externally fixedly connected to a mounting frame (2). A wire winding wheel (7) is provided on the mounting frame (2). A welding wire (3) is provided on the wire winding wheel (7). The end of the welding wire (3) away from the wire winding wheel (7) is located outside the mounting frame (2). A wire feeding mechanism (4) is provided outside the welding wire (3). A cleaning module (9) is provided on the wire feeding mechanism (4). A wire outlet connector (10) is provided outside the welding wire (3). The wire outlet connector (10) is located on the wire feeding mechanism (4). The wire feeding mechanism (4) is provided with a flexible tube (5) on its outside. A welding gun (6) is provided at one end of the flexible tube (5) away from the wire outlet connector (10). A wire feeding buffer and shock absorption module (8) is provided on the outside of the welding wire (3). The wire feeding buffer and shock absorption module (8) is located inside the flexible tube (5). The wire feeding buffer and shock absorption module (8) includes a housing (801). The outside of the housing (801) is rotatably connected to the inner wall of the wire outlet connector (10) by an external thread. A floating guide sleeve is provided inside the housing (801). 802), the floating guide sleeve (802) is located outside the welding wire (3), and a collar (803) is fixedly connected to the outside of the floating guide sleeve (802). Two symmetrical sliding grooves (804) are opened on the outside of the collar (803). Limiting keys (805) are slidably connected in the sliding grooves (804). The outside of the limiting keys (805) is fixedly connected to the inner wall of the outer shell (801), and a Teflon sealing ring (810) is slidably connected to the outside of the floating guide sleeve (802). The sealing ring (810) is fixedly connected to the side of the outer shell (801) away from the outlet connector (10). A return spring (806) surrounds the outside of the floating guide sleeve (802). The end of the return spring (806) near the Teflon sealing ring (810) is fixedly connected to the outside of the Teflon sealing ring (810). A fixing ring (807) is fixedly connected to the outside of the floating guide sleeve (802). The return spring (806) is located between the Teflon sealing ring (810) and the fixing ring (807).

2. The inverter-type gas shielded welding machine for steel structures according to claim 1, characterized in that, The inner wall of the outer shell (801) is slidably connected to a movable ring (811), the inner wall of the movable ring (811) is slidably connected to the outer side of the floating guide sleeve (802), the end of the return spring (806) away from the Teflon sealing ring (810) is fixedly connected to the outer side of the movable ring (811), the outer side of the floating guide sleeve (802) is surrounded by an annular airbag (812), the annular airbag (812) is fixedly connected to the outer side of the movable ring (811), and the inner wall of the outer shell (801) is fixedly connected to a positioning ring (813), the positioning ring (813) is located outside the floating guide sleeve (802), and the annular airbag (812) is fixedly connected to the outer side of the positioning ring (813).

3. The inverter-type gas shielded welding machine for steel structures according to claim 2, characterized in that, The positioning ring (813) has two symmetrical circular holes, and each circular hole is fixedly connected to an air guide tube (814). One end of each air guide tube (814) is connected to an annular airbag (812), and the other end is fixedly connected to a columnar airbag (816). The outside of the fixing ring (807) is fixedly connected to two symmetrical bosses. The outside of each boss is fixedly connected to the side of the columnar airbag (816) away from the air guide tube (814) on the same side. The outside of each air guide tube (814) is fixedly connected to a bracket (815). The bracket (815) is fixedly connected to the opposite side of the outside of the positioning ring (813), and the bracket (815) is fixedly connected to the opposite side of the outside of the columnar airbag (816).

4. The inverter-type gas shielded welding machine for steel structures according to claim 3, characterized in that, Both of the columnar airbags (816) are slidably connected to the outside of a guide cover (817). The inner wall of the guide cover (817) is slidably connected to the outside of the boss. The guide cover (817) is fixedly connected to the opposite side of the outside of the bracket (815). The outside of the air duct (814) is provided with a conical sleeve (818). The conical sleeve (818) is provided with multiple circumferentially distributed slits (819). The outside of the conical sleeve (818) is slidably connected to an annular piece (820). The side of the annular piece (820) near the positioning ring (813) is fixedly connected to an arc-shaped pin (822). The outside of the arc-shaped pin (822) is inserted with a pusher (821). The pusher (821) is attached to the opposite side of the annular piece (820). The pusher (821) is located outside the conical sleeve (818).

5. The inverter-type gas shielded welding machine for steel structures according to claim 4, characterized in that, The positioning ring (813) has two symmetrical small holes, and the inner walls of the small holes are movably connected to adjusting bolts (823). The pusher (821) has a round opening, and the inner wall of the round opening is rotatably connected to the outside of the arc pin (822) on the same side through an external thread. The outer shell (801) has two symmetrical slots on the side near the outlet connector (10), and adjusting screws (808) and smooth rods (809) are respectively installed in the slots. The floating guide sleeve (802) has two symmetrical slots on the side near the slots, and the inner walls of the two slots are slidably connected to the outside of adjusting screws (808) and smooth rods (809) respectively.

6. The inverter-type gas shielded welding machine for steel structures according to claim 5, characterized in that, The outer casing (801) has a deep groove on the side near the outlet connector (10). The groove is located outside the adjusting screw (808). An installation ring (11) is fixedly connected to the end of the adjusting screw (808) away from the floating guide sleeve (802). The installation ring (11) has multiple circumferentially equidistant slots (12). A constraint sleeve (13) is rotatably connected to the outside of the adjusting screw (808) through an external thread. The constraint sleeve (13) is fixedly connected to the inner opposite side of the deep groove, and the constraint... The sleeve (13) has an external sliding connection with an outer ring (15). The outer ring (15) and the opposite side of the outer side of the constraint sleeve (13) are fixedly connected with the same push spring (14). The outer ring (15) has two symmetrical guide rails (16). The guide rails (16) are fixedly connected to the opposite side of the inner wall of the deep groove. The inner wall of the outer ring (15) is fixedly connected with multiple circumferentially distributed limit clips (17). The outer side of the limit clips (17) is engaged with the inner wall of the slot (12).

7. The inverter-type gas shielded welding machine for steel structures according to claim 1, characterized in that, The cleaning module (9) includes a dust cover (901). Two symmetrical guide wheels (18) are mounted on the wire feeding mechanism (4). The dust cover (901) is located outside the two guide wheels (18). Two symmetrical short shafts are fixedly connected to the inner wall of the dust cover (901). Brushes (915) are movably connected to the outside of each short shaft. The outside of each brush (915) contacts the outside of the guide wheel (18) on the same side. A torsion spring (914) is mounted on the outside of each short shaft. One end of each torsion spring (914) is... The short shaft on the same side is fixedly connected to the outside, and the other end is fixedly connected to the outside of the brush (915) on the same side. The bottom inner wall of the dust cover (901) is fixedly connected to the storage box (916). The upper side of the storage box (916) is provided with a narrow opening. The inner wall of the narrow opening is fixedly connected to a three-way pipe (917). The two ends of the three-way pipe (917) away from the storage box (916) are fixedly connected to the drip connectors (924). The outside of the drip connectors (924) is fixedly connected to the outside of the brush (915) on the same side.

8. The inverter-type gas shielded welding machine for steel structures according to claim 7, characterized in that, A pump (918) is fixedly connected to the upper side of the storage tank (916). The output end of the pump (918) is connected to a three-way pipe (917) through a round pipe. Two symmetrical motors (919) are fixedly connected to the upper side of the storage tank (916). The output ends of the motors (919) are all connected to cams (920) through couplings. The outer side of the cams (920) is in contact with the outer side of the brush (915) on the same side, and the outer side of the guide wheel (18) is also in contact with the outer side of the brush (915). Each is equipped with a stand (921), the bottom of which is fixedly connected to the inner wall of the dust cover (901). Each stand (921) is equipped with a lead screw (922), and a sponge block (923) is movably connected to one end of the lead screw (922) near the guide wheel (18). The outside of the sponge block (923) is slidably connected to the inner wall of the dust cover (901), and the opposite side of the sponge block (923) and the guide wheel (18) are in contact.

9. The inverter-type gas shielded welding machine for steel structures according to claim 8, characterized in that, Both of the wire guide wheels (18) have openings, and the inner walls of the openings are fixedly connected to fitting cylinders (902). The wire feeding mechanism (4) is provided with two symmetrical drive shafts (905). The inner walls of the fitting cylinders (902) are provided with two symmetrical grooves (903). The inner walls of the grooves (903) are inserted into the outside of the drive shafts (905) on the same side. The outside of the drive shafts (905) is fixedly connected to a fixed platform (906). The fixed platform (906) and the side opposite to the outside of the fitting cylinders (902) are fixedly connected with two symmetrical magnets (904). The opposite sides of the two magnets (904) on the same side are attached to each other.

10. The inverter-type gas shielded welding machine for steel structures according to claim 9, characterized in that, Both drive shafts (905) have pre-drilled holes on the side away from the wire feeding mechanism (4). Anti-deviation rings (907) are fixedly connected to the inner walls of the pre-drilled holes. Locking pins (908) are inserted into the pre-drilled holes. Annular grooves (910) are provided on the outside of the locking pins (908), and two symmetrical elastic springs (909) are engaged within the annular grooves (910). The outer surfaces of the elastic springs (909) are fixedly connected to the inner walls of the pre-drilled holes. Two symmetrical rectangular... A locking block (911) is slidably connected inside the rectangular groove. The outside of the locking block (911) is engaged with the outside of the fitting cylinder (902) on the same side. A narrow groove is opened on the locking block (911). A flat rod (912) is slidably connected inside the narrow groove. The outside of the flat rod (912) is fixedly connected to the inner wall of the rectangular groove on the same side. A tension spring (913) is provided on the inner wall of the narrow groove. One end of the tension spring (913) is fixedly connected to the inner wall of the narrow groove, and the other end is fixedly connected to the outside of the flat rod (912) on the same side.

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