Mechanical carbon dioxide arc welding device and method

Abstract

The invention discloses a mechanical carbon dioxide arc welding device and method, and particularly relates to the field of welding, the welding device comprises a welding machine, a gas cylinder and a welding gun, the welding gun is connected with the welding machine, and the gas cylinder is used for conveying protective gas to the welding gun; the wire feeding device further comprises a moving frame, a wire feeding frame is installed on the moving frame, a wire feeding assembly is installed on the wire feeding frame, the wire feeding assembly comprises a plurality of upper wire feeding wheels and a plurality of lower wire feeding wheels, the upper wire feeding wheels correspond to the lower wire feeding wheels in a one-to-one mode, and the lower wire feeding wheels are in transmission connection through gear transmission components. Through the arrangement of the gear transmission part and the belt transmission part, the two lower wire feeding wheels are driven by the gear transmission part to rotate in the same direction, the two upper wire feeding wheels are driven by the belt transmission part to rotate in the same direction, and the rotating directions of the two upper wire feeding wheels are opposite to the rotating directions of the lower wire feeding wheels; therefore, the lower wire feeding wheel and the upper wire feeding wheel both obtain power to convey welding wires, the conveying force is increased, and the wire feeding speed is increased.

Description

Technical Field

[0001] The present invention relates to the field of welding technology, and more specifically, to a mechanical carbon dioxide shielded welding device and method. Background Art

[0002] Carbon dioxide shielded welding is an efficient and economical welding method that uses carbon dioxide gas to isolate the air, which can prevent the molten pool from reacting with oxygen and nitrogen, reduce porosity and embrittlement, and is widely used in multiple industrial fields.

[0003] The welding equipment of carbon dioxide shielded welding mainly includes welding machine, wire feeding mechanism, gas cylinder and welding gun. The wire feeding mechanism transports the welding wire from the wire reel to the front end of the welding gun. The gas cylinder contains high-pressure liquid carbon dioxide, which is converted into gas through a pressure reducing valve and transported to the welding gun at a constant flow rate. The wire feeding mechanism is mainly composed of a wire feeding motor and a wire feeding wheel. The wire feeding motor drives the wire feeding wheel to rotate, and the welding wire is transported between the paired wire wheels.

[0004] When feeding wire in the existing carbon dioxide shielded welding device, a motor drives one of the wire feeding wheels to move, and the other wire feeding wheels are driven to rotate by the welding wire. This method has a small wire feeding force, resulting in a slow wire feeding speed. Summary of the invention

[0005] The invention provides a mechanical carbon dioxide shielded welding device and method, aiming to solve the problem that the existing carbon dioxide shielded welding device has a small wire feeding force when feeding the wire, resulting in a slow wire feeding speed.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a mechanical carbon dioxide shielded welding device, comprising a welding machine, a gas cylinder and a welding gun, the welding gun is connected to the welding machine, and the gas cylinder is used to convey shielding gas to the welding gun; it also comprises a moving frame, a wire feeding frame is mounted on the moving frame, a wire feeding assembly is mounted on the wire feeding frame, the wire feeding assembly comprises a plurality of upper wire feeding wheels and a lower wire feeding wheel, the upper wire feeding wheels and the lower wire feeding wheels correspond to each other one by one, the plurality of lower wire feeding wheels are connected by a gear transmission component, so that the transmission directions of the plurality of lower wire feeding wheels are the same, the plurality of upper wire feeding wheels are connected by a belt transmission component, so that the transmission directions of the plurality of upper wire feeding wheels and the lower wire feeding wheels are opposite, a welding wire reel is mounted on the moving frame, welding wire is stored on the welding wire reel, the welding wire passes through between the plurality of lower wire feeding wheels and the plurality of upper wire feeding wheels and is conveyed to the welding gun.

[0007] In a preferred embodiment, two lower wire feeding wheels and two upper wire feeding wheels are provided, and the upper wire feeding wheel located at the top and the lower wire feeding wheel located at the bottom are arranged vertically opposite to each other.

[0008] In a preferred embodiment, the gear transmission component includes two gear ones, the two gear ones are fixedly connected to the two lower wire feeding wheels respectively, a gear two is arranged between the two gear ones, the gear two is meshed with the two gear ones, a power component is installed on the wire feeding frame, and the output end of the power component is connected to gear two.

[0009] In a preferred embodiment, the belt transmission component includes three pulleys, which are respectively fixedly mounted on two upper wire feeding wheels and the output end of the power component. The transmission sleeves on the three pulleys are provided with belts, and the three pulleys are connected by belt transmission, so that the two upper wire feeding wheels have the same rotation direction as gear 2.

[0010] In a preferred embodiment, the wire feeding frame includes a base frame and a disassembly frame, the base frame is fixedly mounted on the mobile frame, the disassembly frame is detachably mounted on the upper end of the base frame, two lower wire feeding wheels are rotatably mounted on the base frame, and two upper wire feeding wheels are rotatably mounted on the disassembly frame.

[0011] In a preferred embodiment, slot 2 is provided on both sides of the upper surface of the base frame, slot 1 is provided at both ends of the disassembly frame, slot 1 is aligned with slot 2, locking handles are provided at both ends of the disassembly frame, the locking handles are pressed on the upper surface of the disassembly frame, and the lower end of the locking handle passes through slot 1 and slot 2 and is threadedly connected to the base frame.

[0012] In a preferred embodiment, a front wire feeding tube and a rear wire feeding tube are respectively installed on both sides of the wire feeding frame, and the welding wire passes through the front wire feeding tube, between the lower wire feeding wheel and the upper wire feeding wheel, and the rear wire feeding tube in sequence.

[0013] In a preferred embodiment, a back plate and a vertical pole are fixedly mounted on the rear side of the mobile frame, the upper end of the vertical pole is fixedly connected to the end of the back plate, and the welding wire reel is rotatably mounted on the end of the back plate.

[0014] In a preferred embodiment, the gas cylinder contains high-pressure liquid carbon dioxide, which is converted into gas through a pressure reducing valve and delivered to the welding gun at a constant flow rate.

[0015] In a preferred embodiment, the welding device also includes a wire feeding belt, which includes an upper belt and a lower belt. The upper belt is sleeved on two upper wire feeding wheels, and the lower belt is sleeved on two lower wire feeding wheels. The surfaces of the upper belt and the lower belt are in contact and fit with each other. A wire feeding groove is opened in the length direction of the lower belt. The depth of the wire feeding groove is less than the diameter of the welding wire. When the welding wire is transported, the welding wire is located in the wire feeding groove.

[0016] In a preferred embodiment, a wire pressing assembly and a transmission assembly are respectively provided at the front and lower positions of the two lower wire feeding wheels. The transmission assembly is used to drive the wire pressing assembly to move along the conveying direction of the welding wire. The wire pressing assembly includes a wire pressing rod. A wire clamping groove is provided at the lower surface of the wire pressing rod. The wire clamping groove is used to clamp the end of the welding wire.

[0017] In a preferred embodiment, the wire pressing assembly further includes a base. An active rod is vertically and movably inserted into the upper end of the base. An elastic member I is arranged inside the base. Two ends of the elastic member I press against the base and the bottom of the active rod. The wire pressing rod is rotatably connected to the upper end of the active rod.

[0018] In a preferred embodiment, a rotating sleeve is rotatably connected to the upper end of the active rod. A notch is formed on one side of the rotating sleeve. The wire pressing rod is rotatably connected to the upper end of the active rod through a torsion spring. One end of the wire pressing rod away from the wire clamping groove has a positioning post, and the positioning post presses against the upper end of the rotating sleeve.

[0019] In a preferred embodiment, the transmission assembly includes a slide rail. The slide rail is installed on the wire feeding frame. A rack is slidably installed on the slide rail. The rack can be meshed with the second gear. The active rod is fixedly installed on the rack.

[0020] In a preferred embodiment, fixed columns are fixedly connected to both sides of the wire feeding frame. The slide rail is movably sleeved on the fixed columns. An elastic member II is sleeved on the fixed columns. The elastic member II presses against the wire feeding frame and the slide rail. A positioning rod is fixedly installed on one side of the wire feeding frame close to the wire reel. A card slot is arranged on the positioning rod. A clamping block is fixedly connected to the bottom of the rack.

[0021] In a preferred embodiment, a positioning block is fixedly connected to the outer surface of the rear wire feeding pipe. A positioning groove is formed on the outer surface of one side of the wire feeding frame. The positioning block is rotatably clamped in the positioning groove.

[0022] In a preferred embodiment, an airbag is fixedly connected to the inside of one end of the front wire feeding pipe away from the rear wire feeding pipe. The welding wire passes through the middle of the airbag. One end of the airbag extends to the outer surface of the front wire feeding pipe. A pressing plate is fixedly connected to one side of the wire feeding frame. One end of the pressing plate close to the wire feeding frame has an avoidance groove. The other end of the pressing plate has an upper inclined portion. The outer convex portion is in pressing contact with the pressing plate.

[0023] The present invention also provides a method for using the above mechanical carbon dioxide shielded welding device, including the following steps: Step 1: Install the wire reel on the moving frame; Step 2: Pass the welding wire on the wire reel through the front wire feeding pipe, between the lower wire feeding wheels and the upper wire feeding wheels, and the rear wire feeding pipe in sequence; Step 3: Use a welding torch to weld the workpiece. During the welding process, drive the two lower wire feeding wheels and the two upper wire feeding wheels to rotate through the power component, so as to feed the welding wire to the welding torch; In Step 2, when passing the welding wire on the wire reel between the lower wire feeding wheels and the upper wire feeding wheels, it specifically includes the following steps: S1: Clamp the end of the welding wire in the wire pressing rod; S2: Drive two lower wire feeding wheels and two upper wire feeding wheels to rotate through the power component. The wire pressing rod drives the welding wire into the space between the upper belt and the lower belt, thereby pressing the welding wire into the wire feeding groove. S3: After the welding wire passes through the upper belt and the lower belt, remove the end of the welding wire from the wire clamping groove.

[0024] Technical effects and advantages of the present invention: Through the settings of the gear transmission component and the belt transmission component, the present invention drives two lower wire feeding wheels to rotate in the same direction by using the gear transmission component, drives two upper wire feeding wheels to rotate in the same direction by using the belt transmission component, and makes the rotation directions of the two upper wire feeding wheels opposite to those of the lower wire feeding wheels. Thus, both the lower wire feeding wheels and the upper wire feeding wheels obtain power to convey the welding wire, thereby increasing the conveying force and improving the wire feeding speed.

[0025] By setting the upper belt and the lower belt, during the conveying process, the welding wire is located inside the wire feeding groove, and the welding wire has a large contact surface with the upper belt and the lower belt, with a large frictional force. On the one hand, the welding wire can be quickly conveyed forward. On the other hand, since the materials of the upper belt and the lower belt are relatively soft, the welding wire will not be extruded and deformed, thereby ensuring the welding stability. Description of the drawings

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0027] Figure 2 For the present invention Figure 1 Front view of the partial structure.

[0028] Figure 3 For the present invention Figure 1 Rear view of the partial structure.

[0029] Figure 4 It is a schematic diagram of the installation of the wire feeding frame of the present invention.

[0030] Figure 5 It is a schematic diagram of the wire feeding assembly of the present invention.

[0031] Figure 6 It is a schematic diagram of the overall structure of the present invention installed with the wire pressing assembly and the transmission assembly.

[0032] Figure 7 For the present invention Figure 6 Front view of the partial structure.

[0033] Figure 8 For the present invention Figure 6 Schematic diagram of the partial structure.

[0034] Figure 9 It is a schematic diagram of the installation of the wire pressing assembly and the transmission assembly of the present invention.

[0035] Figure 10 This is a schematic structural diagram of the wire pressing component of the present invention.

[0036] Figure 11 This is a cross-sectional view of the wire pressing component of the present invention.

[0037] Figure 12 This is the present invention Figure 8 of the cross-sectional view.

[0038] Figure 13 This is the present invention Figure 12 of the enlarged partial structure view at A.

[0039] Figure 14 This is the installation schematic diagram of the front wire feeding tube, airbag, convex part, and welding wire of the present invention.

[0040] Figure 15 This is the present invention Figure 14 of the explosion view.

[0041] Figure 16 This is the step diagram of the method for using the mechanical carbon dioxide shielded welding device of the present invention.

[0042] Reference numerals are: 1, welding machine; 2, gas cylinder; 3, welding torch; 4, moving frame; 41, wire feeding frame; 411, bottom frame; 412, disassembly and assembly frame; 4121, notch one; 4122, notch two; 413, locking handle; 42, back plate; 43, vertical rod; 5, wire feeding component; 50, power component; 51, lower wire feeding wheel; 52, upper wire feeding wheel; 53, gear transmission component; 531, gear one; 532, gear two; 54, belt transmission component; 541, belt pulley; 542, belt; 6, welding wire reel; 61, welding wire; 7, front wire feeding tube; 71, rear wire feeding tube; 8, wire feeding belt; 81, upper belt; 82, lower belt; 821, wire feeding groove; 9, wire pressing component; 90, wire pressing rod; 901, wire clamping groove; 902, positioning column; 91, base; 92, movable rod; 93, rotating sleeve; 931, notch; 94, elastic component one; 100, transmission component; 101, slide rail; 102, rack; 103, fixed column; 104, elastic component two; 105, positioning rod; 106, card slot; 107, card block; 110, positioning block; 111, positioning groove; 120, airbag; 121, convex part; 122, pressing plate; 123, avoiding groove; 124, upper inclined part. Detailed implementation manners

[0043] The following will be combined with the drawings in 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.

[0044] Refer to the instruction manual Figures 1 - 5 A mechanical carbon dioxide shielded welding device comprises a welding machine 1, a gas cylinder 2 and a welding gun 3, the welding gun 3 is connected to the welding machine 1, and the gas cylinder 2 is used to convey shielding gas to the welding gun 3; it also comprises a moving frame 4, a wire feeding frame 41 is installed on the moving frame 4, a wire feeding assembly 5 is installed on the wire feeding frame 41, the wire feeding assembly 5 comprises a plurality of upper wire feeding wheels 52 and a lower wire feeding wheel 51, the upper wire feeding wheels 52 and the lower wire feeding wheels 51 correspond to each other one by one, the plurality of lower wire feeding wheels 51 are connected by a gear transmission component 53, so that the transmission directions of the plurality of lower wire feeding wheels 51 are the same, the plurality of upper wire feeding wheels 52 are connected by a belt transmission component 54, so that the transmission directions of the plurality of upper wire feeding wheels 52 and the lower wire feeding wheels 51 are opposite, a welding wire reel 6 is installed on the moving frame 4, welding wire 61 is stored on the welding wire reel 6, the welding wire 61 passes between the plurality of lower wire feeding wheels 51 and the plurality of upper wire feeding wheels 52 and is transported to the welding gun 3.

[0045] In the above technical solution, if Figure 5 As shown, two lower wire feeding wheels 51 and two upper wire feeding wheels 52 are provided, and the upper wire feeding wheel 52 located at the top and the lower wire feeding wheel 51 located at the bottom are arranged vertically opposite to each other.

[0046] Specifically, the gear transmission component 53 includes two gear ones 531, and the two gear ones 531 are fixedly connected to the two lower wire feeding wheels 51 respectively. A gear two 532 is arranged between the two gear ones 531, and the gear two 532 is meshed with the two gear ones 531. A power component 50 is installed on the wire feeding frame 41, and the output end of the power component 50 is connected to the gear two 532.

[0047] It should be noted that the power component 50 is a motor, which drives the second gear 532 to rotate, and the second gear 532 drives the two first gears 531 to rotate, thereby rotating the two lower wire feeding wheels 51, and the two lower wire feeding wheels 51 rotate in the same direction.

[0048] Specifically, the belt transmission component 54 includes three pulleys 541, which are respectively fixedly mounted on the two upper wire feeding wheels 52 and the output end of the power component 50. The transmission sleeves of the three pulleys 541 are provided with belts 542. The three pulleys 541 are connected through the belts 542, so that the two upper wire feeding wheels 52 and the gear 2 532 have the same rotation direction.

[0049] It should be noted that through the transmission of three belt pulleys 541 and a belt 542, the rotation directions of the two upper wire feeding wheels 52 and the second gear 532 can be made the same, so that the rotation directions of the two upper wire feeding wheels 52 are opposite to those of the two lower wire feeding wheels 51, facilitating the feeding of the welding wire 61. It should be noted that, as Figure 5 shown, the diameter of the belt pulley 541 installed at the output end of the power component 50 is reasonably set so that the diameter of the belt pulley 541 installed at the output end of the power component 50 is larger than the diameter of the belt pulleys 541 on the two upper wire feeding wheels 52, to ensure that the rotational speeds of the lower wire feeding wheels 51 and the upper wire feeding wheels 52 are the same.

[0050] Furthermore, as Figure 4 shown, a front wire feeding pipe 7 and a rear wire feeding pipe 71 are respectively installed on both sides of the wire feeding frame 41, and the welding wire 61 passes through the front wire feeding pipe 7, between the lower wire feeding wheels 51 and the upper wire feeding wheels 52, and the rear wire feeding pipe 71 in sequence.

[0051] Furthermore, the gas cylinder 2 is filled with high-pressure liquid carbon dioxide, which is converted into gas through a pressure reducing valve and is transported to the welding torch 3 at a constant flow rate.

[0052] In this embodiment, the implementation method is specifically as follows: First, the welding wire 61 on the wire reel 6 passes through the front wire feeding pipe 7, then passes between the lower wire feeding wheels 51 and the upper wire feeding wheels 52, and finally passes through the rear wire feeding pipe 71. The power component 50 drives the lower wire feeding wheels 51 and the upper wire feeding wheels 52 to rotate, feeding the welding wire 61, so as to transport the welding wire 61 to the welding torch 3, and then welding can be carried out.

[0053] Through the setting of the gear transmission component 53 and the belt transmission component 54 in the above technical solution, the gear transmission component 53 is used to drive the two lower wire feeding wheels 51 to rotate in the same direction, and the belt transmission component 54 is used to drive the two upper wire feeding wheels 52 to rotate in the same direction, and the rotation directions of the two upper wire feeding wheels 52 are opposite to those of the lower wire feeding wheels 51, so that both the lower wire feeding wheels 51 and the upper wire feeding wheels 52 obtain power to feed the welding wire 61, thereby increasing the feeding force and improving the wire feeding speed.

[0054] In this embodiment, as Figure 4 shown, the wire feeding frame 41 includes a bottom frame 411 and a dismountable frame 412. The bottom frame 411 is fixedly installed on the moving frame 4, and the dismountable frame 412 is detachably installed at the upper end of the bottom frame 411. The two lower wire feeding wheels 51 are rotatably installed on the bottom frame 411, and the two upper wire feeding wheels 52 are rotatably installed on the dismountable frame 412.

[0055] Further, notch two 4122 is formed on both sides of the upper surface of the chassis 411. Notch one 4121 is formed at both ends of the disassembly and assembly frame 412. Notch one 4121 is aligned with notch two 4122. Locking handles 413 are arranged at both ends of the disassembly and assembly frame 412. The locking handles 413 press on the upper surface of the disassembly and assembly frame 412. The lower end of the locking handle 413 passes through notch one 4121 and notch two 4122 and is threadedly connected to the chassis 411.

[0056] It should be noted that when installing the two upper wire feeding wheels 52, first install the two upper wire feeding wheels 52 on the disassembly and assembly frame 412, then place the disassembly and assembly frame 412 on the top of the chassis 411, and finally pass the locking handle 413 through notch one 4121 and notch two 4122 and threadedly connect it to the chassis 411, so that the locking handle 413 presses on the disassembly and assembly frame 412 to fix the disassembly and assembly frame 412.

[0057] In this embodiment, as Figure 3 shown, a back plate 42 and a vertical rod 43 are fixedly installed on the rear side of the moving frame 4. The upper end of the vertical rod 43 is fixedly connected to the end of the back plate 42. The wire spool 6 is rotatably installed at the end of the back plate 42.

[0058] It should be noted that by supporting the back plate 42 with the vertical rod 43, the stability during the installation of the wire spool 6 can be improved.

[0059] Referring to the attached Figures 1 - 16 drawings of the specification, the welding device further includes a wire feeding belt 8. The wire feeding belt 8 includes an upper belt 81 and a lower belt 82. The upper belt 81 is sleeved on the two upper wire feeding wheels 52. The lower belt 82 is sleeved on the two lower wire feeding wheels 51. The surfaces of the upper belt 81 and the lower belt 82 are in contact and fit. A wire feeding groove 821 is formed in the length direction of the lower belt 82. The depth of the wire feeding groove 821 is less than the diameter of the welding wire 61. When transporting the welding wire 61, the welding wire 61 is located in the wire feeding groove 821.

[0060] In this embodiment, the implementation method is as follows: Preparation before welding. First, the welding wire 61 on the wire reel 6 passes through the front wire feeding tube 7, and then the end of the welding wire 61 extends between the upper belt 81 and the lower belt 82, specifically into the inside of the wire feeding groove 821. Then, the power component 50 drives the lower wire feeding wheel 51 and the upper wire feeding wheel 52 to rotate, so that the upper belt 81 and the lower belt 82 are driven. At this time, the upper belt 81 and the lower belt 82 can convey the welding wire 61 forward. When the welding wire 61 is conveyed to the rear wire feeding tube 71, the welding wire 61 is passed through the rear wire feeding tube 71. At this time, the welding wire 61 is located inside the wire feeding groove 821, and during the subsequent conveying process, the welding wire 61 is conveyed inside the wire feeding groove 821. Since the depth of the wire feeding groove 821 is less than the diameter of the welding wire 61, the upper belt 81 will press on the surface of the welding wire 61. The power component 50 drives the lower wire feeding wheel 51 and the upper wire feeding wheel 52 to rotate to convey the welding wire 61, so as to convey the welding wire 61 to the welding torch 3, and then welding can be carried out.

[0061] Through the above technical solution, by setting the upper belt 81 and the lower belt 82, during the conveying process, the welding wire 61 is located inside the wire feeding groove 821, and the welding wire 61 has a large contact surface with the upper belt 81 and the lower belt 82, with a large frictional force. On the one hand, the welding wire 61 can be quickly conveyed forward. On the other hand, since the materials of the upper belt 81 and the lower belt 82 are relatively soft (such as rubber materials), the welding wire 61 will not be extruded and deformed, so as to ensure the welding stability.

[0062] When passing the welding wire 61 between the upper belt 81 and the lower belt 82, if the welding wire 61 is directly inserted between the upper belt 81 and the lower belt 82 by hand, then when the upper belt 81 and the lower belt 82 drive the welding wire 61 forward, the fingers may be involved, which is relatively dangerous. Therefore, the following technical solution is proposed.

[0063] Specifically, as Figures 6 - 15 shown, a wire pressing assembly 9 and a transmission assembly 100 are respectively arranged at the front side position and the lower side position of the two lower wire feeding wheels 51. The transmission assembly 100 is used to drive the wire pressing assembly 9 to move along the conveying direction of the welding wire 61. The wire pressing assembly 9 includes a wire pressing rod 90, and a wire clamping groove 901 is formed at the lower surface position of the wire pressing rod 90 for clamping the end of the welding wire 61.

[0064] Furthermore, the wire pressing assembly 9 further includes a base 91. An activity rod 92 is vertically and movably inserted into the upper end of the base 91. An elastic component I 94 is arranged inside the base 91. Both ends of the elastic component I 94 press on the base 91 and the bottom of the activity rod 92. The wire pressing rod 90 is rotatably connected to the upper end of the activity rod 92. Among them, the elastic component I 94 is a spring.

[0065] Furthermore, the transmission assembly 100 includes a slide rail 101, which is installed on the wire feeding frame 41. A rack 102 is slidably installed on the slide rail 101, and the rack 102 can be engaged with the gear 2 532. The movable rod 92 is fixedly installed on the rack 102.

[0066] It should be noted that after the welding wire 61 is passed through the front wire feeding tube 7, the end of the welding wire 61 is inserted into the inside of the wire slot 901, and then the power component 50 drives the upper belt 81 and the lower belt 82 to transmit, the gear 2 532 drives the rack 102 to move, and the rack 102 drives the wire pressing assembly 9 to move, so that the wire pressing rod 90 moves between the upper belt 81 and the lower belt 82, and passes through the upper belt 81 and the lower belt 82, and the welding wire 61 also passes through the upper belt 81 and the lower belt 82 and enters the inside of the wire feeding slot 821. It should also be noted that when the wire pressing rod 90 enters between the upper belt 81 and the lower belt 82, the gear 2 532 and the rack 102 are disengaged, and the movement of the wire pressing rod 90 is driven by the upper belt 81 and the lower belt 82. When the welding wire 61 is transported to the rear wire feeding tube 71, the welding wire 61 is passed through the rear wire feeding tube 71.

[0067] By adopting the above technical solution and using the wire pressing rod 90 to pull the welding wire 61, it is possible to avoid having hands approaching the upper belt 81 and the lower belt 82 when inserting the welding wire 61, thereby effectively avoiding the risk of fingers being entangled.

[0068] Furthermore, if Figures 9 - 11 As shown, the upper end of the movable rod 92 is rotatably connected to a rotating sleeve 93, a notch 931 is provided on one side of the rotating sleeve 93, the screw rod 90 is rotatably connected to the upper end of the movable rod 92 through a torsion spring, and the end of the screw rod 90 away from the wire slot 901 has a positioning column 902, and the positioning column 902 is pressed on the upper end of the rotating sleeve 93.

[0069] It should be noted that, after the wire pressing rod 90 pulls the welding wire 61 to one side of the rear wire feeding tube 71, in order to prevent the wire pressing rod 90 from affecting the feeding of the welding wire 61 during the subsequent welding process, the rotating sleeve 93 can be rotated so that the notch 931 faces one side of the positioning column 902, so that the wire pressing rod 90 will rotate upward under the action of the torsion spring, and the positioning column 902 will enter the notch 931. Since the wire pressing rod 90 rotates upward, the welding wire 61 will not hit the wire pressing rod 90 during the feeding process.

[0070] Furthermore, if Figures 9 - 11As shown in the figure, fixed columns 103 are fixedly connected to both sides of the wire feeding frame 41. The sliding rail 101 is movably sleeved on the fixed column 103. An elastic member II 104 is sleeved on the fixed column 103. The elastic member II 104 presses on the wire feeding frame 41 and the sliding rail 101. A positioning rod 105 is fixedly installed on the side of the wire feeding frame 41 close to the wire reel 6. A card slot 106 is provided on the positioning rod 105. The bottom of the rack 102 is fixedly connected with a clamping block 107. Among them, the elastic member II 104 is a spring.

[0071] It should be noted that a handle is installed on the rack 102. By pulling the handle outwards, the sliding rail 101 and the rack 102 can be moved to the front side of the gear II 532. Then, the rack 102 can be pushed towards the direction of the front wire feeding pipe 7. During the pushing process, the rack 102 will not mesh with the gear II 532. After the rack 102 moves in place, release the handle. Under the action of the elastic member II 104, the sliding rail 101 and the rack 102 reset, and the clamping block 107 at the bottom of the rack 102 enters the inside of the card slot 106. Thus, during the welding process, the rack 102 will not change its position due to vibration.

[0072] Furthermore, as Figure 12 shown in the figure, a positioning block 110 is fixedly connected to the outer surface of the rear wire feeding pipe 71. A positioning groove 111 is formed on the outer surface of one side of the wire feeding frame 41. The positioning block 110 is rotationally engaged in the positioning groove 111.

[0073] It should be noted that when the pressing wire rod 90 pulls the welding wire 61 to the position of the rear wire feeding pipe 71, since the rear wire feeding pipe 71 is relatively close to the upper belt 81 and the lower belt 82, it is not convenient to manually insert the welding wire 61 into the rear wire feeding pipe 71. Therefore, before pulling the welding wire 61, the rear wire feeding pipe 71 can be rotated, the positioning block 110 is moved out of the positioning groove 111, and then the rear wire feeding pipe 71 is pulled to the left to move the rear wire feeding pipe 71 away from the upper belt 81 and the lower belt 82, so as to increase the distance and facilitate the insertion of the welding wire 61. After the welding wire 61 is inserted, the rear wire feeding pipe 71 can be restored to its original position.

[0074] Furthermore, as Figures 12 - 15 shown in the figure, the front wire feeding pipe 7 is slidably inserted into the moving frame 4. An airbag 120 is fixedly connected to the inside of the end of the front wire feeding pipe 7 far from the rear wire feeding pipe 71. The airbag 120 is a flexible annular structure. The welding wire 61 passes through the middle of the annular structure of the airbag 120. One end of the airbag 120 extends to the outer surface of the front wire feeding pipe 7 to form an outer convex part 121. A pressing plate 122 is fixedly connected to one side of the wire feeding frame 41. One end of the pressing plate 122 close to the wire feeding frame 41 has an avoidance groove 123, and the other end of the pressing plate 122 has an upper inclined part 124. The outer convex part 121 is in pressing contact with the pressing plate 122. Among them, the airbag 120 and the outer convex part 121 are integrally formed, and the inside of the two is connected.

[0075] It should be noted that since the end of the front wire feeding tube 7 is relatively close to the upper belt 81 and the lower belt 82, it is inconvenient to install the end of the welding wire 61 on the wire pressing rod 90. Therefore, the front wire feeding tube 7 can be pulled to the right so that the convex portion 121 is located at the position of the upper inclined portion 124. At this time, the convex portion 121 is not squeezed by the upper inclined portion 124, and the welding wire 61 can easily pass through the middle of the airbag 120. Insert the welding wire 61 into the airbag 120 and pass it out from the left end of the front wire feeding tube 7, and then push the front wire feeding tube 7 to move to the left relative to the moving frame 4 so that the convex portion 121 is exactly in contact with the pressing plate 122. At this time, the convex portion 121 is squeezed, and the airbag 120 presses the welding wire 61. Then, the wire pressing rod 90 pulls the welding wire 61. At this time, the front wire feeding tube 7 also moves accordingly. When the convex portion 121 moves to the position of the avoiding groove 123, the convex portion 121 is no longer squeezed, and the welding wire 61 can pass through the airbag 120, and the front wire feeding tube 7 stops moving after moving in place. In this way, the wire reel 6 can automatically move to the left during the traction process to avoid the problem that the distance that the welding wire 61 extends out of the front wire feeding tube 7 is too long during the traction process, resulting in the deviation of the welding wire 61 between the upper belt 81 and the lower belt 82.

[0076] Refer to the attached drawings of the specification Figure 16 , a method for using the above-mentioned mechanical carbon dioxide shielded welding device, comprising the following steps: Step 1: Install the wire reel 6 on the moving frame 4; Step 2: Pass the welding wire 61 on the wire reel 6 through between the front wire feeding tube 7, the lower wire feeding wheel 51 and the upper wire feeding wheel 52, and the rear wire feeding tube 71 in sequence; Step 3: Use the welding torch 3 to weld the workpiece. During the welding process, the power component 50 drives the two lower wire feeding wheels 51 and the two upper wire feeding wheels 52 to rotate, so as to convey the welding wire 61 to the welding torch 3; In Step 2, when passing the welding wire 61 on the wire reel 6 through between the lower wire feeding wheel 51 and the upper wire feeding wheel 52, it specifically includes the following steps: S1: Clamp the end of the welding wire 61 in the wire pressing rod 90; S2: The power component 50 drives the two lower wire feeding wheels 51 and the two upper wire feeding wheels 52 to rotate, and the wire pressing rod 90 drives the welding wire 61 into the space between the upper belt 81 and the lower belt 82, so as to press the welding wire 61 in the wire feeding groove 821; S3: When the welding wire 61 passes through the upper belt 81 and the lower belt 82, remove the end of the welding wire 61 from the wire clamping groove 901.

[0077] Finally: The above are only the preferred embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A mechanical carbon dioxide shielded welding device, characterized in that: It comprises a welding machine (1), a gas cylinder (2) and a welding gun (3), wherein the welding gun (3) is connected to the welding machine (1), and the gas cylinder (2) is used to transport protective gas to the welding gun (3); The invention also comprises a movable frame (4), on which a wire feeding frame (41) is mounted, on which a wire feeding assembly (5) is mounted, the wire feeding assembly (5) comprising a plurality of upper wire feeding wheels (52) and lower wire feeding wheels (51), the upper wire feeding wheels (52) and the lower wire feeding wheels (51) corresponding to each other one by one, the plurality of lower wire feeding wheels (51) being connected to each other by a gear transmission component (53), so that the plurality of lower wire feeding wheels (51) have the same transmission direction, the plurality of upper wire feeding wheels (52) being connected to each other by a belt transmission component (54), so that the plurality of upper wire feeding wheels (52) and the lower wire feeding wheels (51) have opposite transmission directions, and the movable frame (4) is mounted with a welding wire reel (6), on which welding wire (61) is stored, and the welding wire (61) passes between the plurality of lower wire feeding wheels (51) and the plurality of upper wire feeding wheels (52) and is transported to the welding gun (3).

2. A mechanical carbon dioxide shielded welding device according to claim 1, characterized in that: Two of the lower wire feeding wheels (51) and the upper wire feeding wheels (52) are provided, and the upper wire feeding wheel (52) located at the top and the lower wire feeding wheel (51) located at the bottom are arranged vertically opposite to each other.

3. A mechanical carbon dioxide shielded welding device according to claim 2, characterized in that: The gear transmission component (53) comprises two gear ones (531), the two gear ones (531) are fixedly connected to the two lower wire feeding wheels (51) respectively, a gear two (532) is arranged between the two gear ones (531), the gear two (532) is meshed with the two gear ones (531), and a power component (50) is installed on the wire feeding frame (41), and the output end of the power component (50) is connected to the gear two (532).

4. A mechanical carbon dioxide shielded welding device according to claim 3, characterized in that: The belt transmission component (54) comprises three pulleys (541), the three pulleys (541) being fixedly mounted on the two upper wire feeding wheels (52) and the output end of the power component (50), respectively; the transmission sleeves on the three pulleys (541) are provided with belts (542), and the three pulleys (541) are connected by the belts (542), so that the two upper wire feeding wheels (52) and the second gear (532) rotate in the same direction.

5. A mechanical carbon dioxide shielded welding device according to claim 4, characterized in that: The wire feeding frame (41) comprises a base frame (411) and a disassembly frame (412), wherein the base frame (411) is fixedly mounted on the movable frame (4), and the disassembly frame (412) is detachably mounted on the upper end of the base frame (411); the two lower wire feeding wheels (51) are rotatably mounted on the base frame (411), and the two upper wire feeding wheels (52) are rotatably mounted on the disassembly frame (412).

6. A mechanical carbon dioxide shielded welding device according to claim 5, characterized in that: Two notches (4122) are provided on both sides of the upper surface of the base frame (411), and two ends of the disassembling frame (412) are provided with one notch (4121), the one notch (4121) is aligned with the two notches (4122), and locking handles (413) are provided on both ends of the disassembling frame (412), the locking handles (413) are pressed on the upper surface of the disassembling frame (412), and the lower ends of the locking handles (413) pass through the one notch (4121) and the two notches (4122) and are threadedly connected to the base frame (411).

7. A mechanical carbon dioxide shielded welding device according to claim 1, characterized in that: A front wire feeding tube (7) and a rear wire feeding tube (71) are respectively installed on both sides of the wire feeding frame (41); the welding wire (61) passes through the front wire feeding tube (7), between the lower wire feeding wheel (51) and the upper wire feeding wheel (52), and the rear wire feeding tube (71) in sequence.

8. The mechanical carbon dioxide shielded welding device according to claim 1 is characterized in that: A back plate (42) and a vertical rod (43) are fixedly mounted on the rear side of the mobile frame (4); the upper end of the vertical rod (43) is fixedly connected to the end of the back plate (42); and the welding wire reel (6) is rotatably mounted on the end of the back plate (42).

9. The mechanical carbon dioxide shielded welding device according to claim 1, characterized in that: The gas cylinder (2) contains high-pressure liquid carbon dioxide, which is converted into gas through a pressure reducing valve and transported to the welding gun (3) at a constant flow rate.

10. A method for using the mechanical carbon dioxide shielded welding device according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: Install the welding wire reel (6) on the mobile frame (4); Step 2: Pass the welding wire (61) on the welding wire reel (6) through the front wire feeding tube (7), between the lower wire feeding wheel (51) and the upper wire feeding wheel (52), and through the rear wire feeding tube (71) in sequence; Step 3: Use the welding gun (3) to weld the workpiece. During the welding process, the power component (50) drives the two lower wire feeding wheels (51) and the two upper wire feeding wheels (52) to rotate, thereby feeding the welding wire (61) to the welding gun (3).

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