Mechanical carbon dioxide shielded welding device and method

Abstract

The present invention discloses a mechanical carbon dioxide shielded welding device and method, specifically relating to the field of welding. The welding device includes 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 supply shielding gas to the welding gun; the device also includes a mobile frame, a wire feeding frame is installed on the mobile frame, a wire feeding assembly is installed on the wire feeding frame, the wire feeding assembly includes a plurality of upper wire feeding wheels and lower wire feeding wheels, the upper wire feeding wheels and the lower wire feeding wheels correspond to each other, and the plurality of lower wire feeding wheels are connected to each other through a gear transmission component. The present invention uses the arrangement of a gear transmission component and a belt transmission component, utilizes the gear transmission component to drive the two lower wire feeding wheels to rotate in the same direction, utilizes the belt transmission component to drive the two upper wire feeding wheels to rotate in the same direction, and makes the rotation direction of the two upper wire feeding wheels opposite to the rotation direction of the lower wire feeding wheel, so that both the lower wire feeding wheel and the upper wire feeding wheel obtain power to feed the welding wire, thereby increasing the feeding force and thus improving the wire feeding speed.

Description

Technical Field

[0001] The present invention relates to the field of welding technology, and more particularly 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, preventing the molten pool from reacting with oxygen and nitrogen, reducing porosity and embrittlement, and is widely used in multiple industrial fields.

[0003] CO2 shielded welding equipment primarily consists of a welding machine, a wire feeder, a gas cylinder, and a welding gun. The wire feeder transports the welding wire from the wire spool to the front end of the welding gun. The gas cylinder contains high-pressure liquid CO2, which is converted to gas by a pressure reducing valve and delivered to the welding gun at a constant flow rate. The wire feeder primarily consists of a wire feed motor and wire feed rolls. The wire feed motor drives the wire feed rolls, and the welding wire is fed between the paired wire rolls.

[0004] In the existing carbon dioxide shielded welding device, when feeding wire, a motor drives one of the wire feeding wheels to move, while the other wire feeding wheels rely on the welding wire to drive their rotation. This method has a small wire feeding force, resulting in a slow wire feeding speed. Summary of the Invention

[0005] The present 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 low wire feeding force during wire feeding, resulting in a slow wire feeding speed.

[0006] To achieve the above-mentioned objectives, 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 being connected to the welding machine, and the gas cylinder being used to supply shielding gas to the welding gun; and further comprising a movable frame, on which a wire feeding frame is mounted, and on which a wire feeding assembly is mounted, the wire feeding assembly comprising a plurality of upper wire feeding wheels and a lower wire feeding wheel, the upper wire feeding wheels and the lower wire feeding wheels corresponding to each other one by one, the plurality of lower wire feeding wheels being 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 movable frame, the welding wire is stored on the welding wire reel, the welding wire passes between the plurality of lower wire feeding wheels and the plurality of upper wire feeding wheels and is transported 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 above and the lower wire feeding wheel located below 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 the 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 and gear 2 have the same rotation direction.

[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, the two lower wire feeding wheels are rotatably mounted on the base frame, and the 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, and 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 ends of the locking handles pass through slot 1 and slot 2 and are threadedly connected to the base frame.

[0012] In a preferred embodiment, a front wire feed tube and a rear wire feed tube are respectively installed on both sides of the wire feed frame, and the welding wire passes through the front wire feed tube, between the lower wire feed wheel and the upper wire feed wheel, and the rear wire feed 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 feeding 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 also includes a base, the upper end of the base is vertically movably connected to a movable rod, an elastic component 1 is provided inside the base, the two ends of the elastic component 1 are pressed on the bottom of the base and the movable rod, and the wire pressing rod is rotatably connected to the upper end of the movable rod.

[0018] In a preferred embodiment, the upper end of the movable rod is rotatably connected to a rotating sleeve, a notch is provided on one side of the rotating sleeve, the screw rod is rotatably connected to the upper end of the movable rod through a torsion spring, and the end of the screw rod away from the wire slot has a positioning column, and the positioning column is pressed on the upper end of the rotating sleeve.

[0019] In a preferred embodiment, the transmission assembly includes a slide rail, which is installed on the wire feeding frame. A rack is slidably installed on the slide rail, and the rack can engage with gear 2. The movable rod is fixedly installed on the rack.

[0020] In a preferred embodiment, both sides of the wire feeding frame are fixedly connected with fixed columns, the slide rail is movably mounted on the fixed columns, and the fixed columns are sleeved with elastic component 2, which presses on the wire feeding frame and the slide rail. A positioning rod is fixedly installed on the side of the wire feeding frame close to the wire reel, and a card slot is provided on the positioning rod, and a card 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 tube, and a positioning groove is provided on the outer surface of one side of the wire feeding frame, and the positioning block is rotatably engaged in the positioning groove.

[0022] In a preferred embodiment, an air bag is fixedly connected to the interior of the front wire feed tube away from one end of the rear wire feed tube, the welding wire passes through the middle of the air bag, and one end of the air bag extends to the outer surface of the front wire feed tube. A pressure plate is fixedly connected to one side of the wire feed frame, and the pressure plate has an avoidance groove at one end close to the wire feed frame, and the other end of the pressure plate has an upper inclined portion, and the outer convex portion is in squeeze contact with the pressure plate.

[0023] The present invention also provides a method for using the mechanical carbon dioxide shielded welding device, comprising the following steps:

[0024] Step 1: Install the wire reel on the mobile rack;

[0025] Step 2: Pass the welding wire on the wire reel through the front wire feed tube, between the lower wire feed wheel and the upper wire feed wheel, and then through the rear wire feed tube;

[0026] Step 3: Use the welding gun to weld the workpiece. During the welding process, the power component drives the two lower wire feed rollers and the two upper wire feed rollers to rotate, thereby feeding the welding wire to the welding gun;

[0027] In step 2, when the welding wire on the wire spool passes between the lower wire feed roll and the upper wire feed roll, the following steps are specifically included:

[0028] S1: Clamp the end of the welding wire into the wire pressing rod;

[0029] S2: The two lower wire feed rollers and the two upper wire feed rollers are driven by the power component to rotate, and the wire pressing rod brings the welding wire into the space between the upper and lower belts, thereby pressing the welding wire into the wire feed trough;

[0030] S3: After the welding wire passes through the upper belt and the lower belt, the end of the welding wire is removed from the wire groove.

[0031] Technical effects and advantages of the present invention:

[0032] The present invention arranges a gear transmission component and a belt transmission component, utilizes the gear transmission component to drive the two lower wire feeding wheels to rotate in the same direction, utilizes the belt transmission component to drive the two upper wire feeding wheels to rotate in the same direction, and makes the rotation direction of the two upper wire feeding wheels opposite to the rotation direction of the lower wire feeding wheels, so that 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 thus improving the wire feeding speed.

[0033] The present invention provides an upper belt and a lower belt. During the conveying process, the welding wire is located inside the wire feeding trough. The welding wire maintains a large contact area with the upper belt and the lower belt, and has a large friction force. On the one hand, the welding wire can be conveyed forward quickly. On the other hand, since the materials of the upper belt and the lower belt are relatively soft, the welding wire will not be squeezed and deformed, thereby ensuring welding stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0035] Figure 2 For the present invention Figure 1 Main view of the local structure.

[0036] Figure 3 For the present invention Figure 1 Rear view of the local structure.

[0037] Figure 4 Schematic diagram of the installation of the wire feeding frame of the present invention.

[0038] Figure 5 Schematic diagram of the wire feeding assembly of the present invention.

[0039] Figure 6 The present invention is a schematic diagram of the overall structure of the wire pressing assembly and the transmission assembly.

[0040] Figure 7 For the present invention Figure 6 Main view of the local structure.

[0041] Figure 8 For the present invention Figure 6Schematic diagram of the local structure.

[0042] Figure 9 This is a schematic diagram of the installation of the wire pressing assembly and the transmission assembly of the present invention.

[0043] Figure 10 It is a structural schematic diagram of the wire pressing assembly of the present invention.

[0044] Figure 11 It is a cross-sectional view of the wire pressing assembly of the present invention.

[0045] Figure 12 For the present invention Figure 8 sectional view of .

[0046] Figure 13 For the present invention Figure 12 A magnified view of the local structure at point A.

[0047] Figure 14 This is a schematic diagram of the installation of the front wire feed tube, air bag, outer protrusion, and welding wire of the present invention.

[0048] Figure 15 For the present invention Figure 14 Exploded diagram.

[0049] Figure 16 This is a step diagram of a method using a mechanical carbon dioxide shielded welding device according to the present invention.

[0050] The accompanying drawings are marked as follows: 1. welding machine; 2. gas cylinder; 3. welding gun; 4. mobile frame; 41. wire feeding frame; 411. bottom frame; 412. disassembly frame; 4121. slot 1; 4122. slot 2; 413. locking handle; 42. back plate; 43. vertical pole; 5. wire feeding assembly; 50. power component; 51. lower wire feeding wheel; 52. upper wire feeding wheel; 53. gear transmission component; 531. gear 1; 532. gear 2; 54. belt transmission component; 541. pulley; 542. belt; 6. wire reel; 61. welding wire; 7. front wire feeding tube; 71. rear wire feeding tube; 8. wire feeding belt; 8 1. Upper belt; 82. Lower belt; 821. Wire feeding trough; 9. Wire pressing assembly; 90. Wire pressing rod; 901. Wire clamping groove; 902. Positioning column; 91. Base; 92. Movable rod; 93. Rotating sleeve; 931. Notch; 94. Elastic component 1; 100. Transmission assembly; 101. Slide rail; 102. Rack; 103. Fixed column; 104. Elastic component 2; 105. Positioning rod; 106. Clamping groove; 107. Clamping block; 110. Positioning block; 111. Positioning groove; 120. Airbag; 121. Outer protrusion; 122. Press plate; 123. Avoidance groove; 124. Upper inclined portion. DETAILED DESCRIPTION

[0051] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0052] Refer to the instruction manual Figure 1-Figure 5 The wire feeding assembly 5 is installed on the wire feeding frame 4, and the wire feeding assembly 5 includes 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 to each other through 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 to each other through 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 wire reel 6 is installed on the mobile frame 4, and the wire reel 6 stores welding wire 61. The welding wire 61 passes through 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.

[0053] In the above technical solution, if Figure 5 As shown, there are two lower wire feeding wheels 51 and two upper wire feeding wheels 52, and the upper wire feeding wheel 52 located above and the lower wire feeding wheel 51 located below are arranged opposite each other.

[0054] 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.

[0055] It should be noted that the power component 50 is a motor, which drives the gear 2 532 to rotate, and the gear 2 532 then drives the two gears 1 531 to rotate, thereby rotating the two lower wire feeding wheels 51, and the two lower wire feeding wheels 51 rotate in the same direction.

[0056] 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, and 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.

[0057] It should be noted that, by means of the three pulleys 541 and the belt 542, the two upper wire feeding wheels 52 and the gear 2 532 can rotate in the same direction, so that the rotation direction of the two upper wire feeding wheels 52 is opposite to the rotation direction of the two lower wire feeding wheels 51, so as to facilitate the feeding of the welding wire 61. Figure 5 As shown, the diameter of the pulley 541 installed at the output end of the power component 50 is reasonably set so that the diameter of the pulley 541 installed at the output end of the power component 50 is larger than the diameter of the pulley 541 on the two upper wire feeding wheels 52 to ensure that the rotation speeds of the lower wire feeding wheel 51 and the upper wire feeding wheel 52 are the same.

[0058] Furthermore, if Figure 4 As shown, 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, and 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.

[0059] Furthermore, the gas cylinder 2 contains high-pressure liquid carbon dioxide, which is converted into gas through a pressure reducing valve and delivered to the welding gun 3 at a constant flow rate.

[0060] 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 tube 7, then the welding wire 61 passes between the lower wire feeding wheel 51 and the upper wire feeding wheel 52, and finally passes into the rear wire feeding tube 71. The power component 50 drives the lower wire feeding wheel 51 and the upper wire feeding wheel 52 to rotate, and the welding wire 61 is transported to the welding gun 3, and then welding can be performed.

[0061] The above technical solution uses the arrangement of a gear transmission component 53 and a belt transmission component 54, and utilizes the gear transmission component 53 to drive the two lower wire feeding wheels 51 to rotate in the same direction, and utilizes the belt transmission component 54 to drive the two upper wire feeding wheels 52 to rotate in the same direction, and makes the rotation direction of the two upper wire feeding wheels 52 opposite to the rotation direction of the lower wire feeding wheel 51, so that both the lower wire feeding wheel 51 and the upper wire feeding wheel 52 obtain power to convey the welding wire 61, thereby increasing the conveying force and thus improving the wire feeding speed.

[0062] In this embodiment, if Figure 4 As shown, the wire feeding frame 41 includes a base frame 411 and a disassembly frame 412. 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.

[0063] Furthermore, slot 2 4122 is provided on both sides of the upper surface of the base frame 411, slot 1 4121 is provided at both ends of the disassembly frame 412, slot 1 4121 is aligned with slot 2 4122, and locking handles 413 are provided at both ends of the disassembly frame 412, the locking handles 413 are pressed on the upper surface of the disassembly frame 412, and the lower end of the locking handle 413 passes through slot 1 4121 and slot 2 4122 and is threadedly connected to the base frame 411.

[0064] 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 frame 412, then place the disassembly frame 412 on the top of the base frame 411, and finally make the locking handle 413 pass through the slot 1 4121 and the slot 2 4122 and be threadedly connected to the base frame 411, so that the locking handle 413 is pressed on the disassembly frame 412 to fix the disassembly frame 412.

[0065] In this embodiment, if Figure 3 As shown, a back plate 42 and a vertical rod 43 are fixedly installed 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. The welding wire reel 6 is rotatably installed on the end of the back plate 42.

[0066] It should be noted that by having the uprights 43 support the back plate 42 , the stability of the welding wire reel 6 during installation can be improved.

[0067] Refer to the instruction manual Figures 1-16 The welding device also includes a wire feeding belt 8, which includes an upper belt 81 and a lower belt 82. The upper belt 81 is sleeved on the two upper wire feeding wheels 52, and 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 with each other. A wire feeding groove 821 is opened 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 the welding wire 61 is transported, the welding wire 61 is located in the wire feeding groove 821.

[0068] In this embodiment, the implementation method is specifically as follows: before welding, the welding wire 61 on the wire reel 6 is first passed through the front wire feed tube 7, and the end of the welding wire 61 is inserted between the upper belt 81 and the lower belt 82, specifically into the interior of the wire feed groove 821. Then, the power component 50 drives the lower wire feed wheel 51 and the upper wire feed 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 carry the welding wire 61 forward. When the welding wire 61 is delivered to the rear wire feed tube 71, the welding wire 61 is passed through the rear wire feed tube 71. At this time, the welding wire 61 is located inside the wire feed groove 821, and in the subsequent delivery process, the welding wire 61 is delivered inside the wire feed groove 821. Since the depth of the wire feed 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, and feeds the welding wire 61, thereby feeding the welding wire 61 to the welding gun 3, and then welding can be performed.

[0069] The above technical solution sets up the upper belt 81 and the lower belt 82. During the transportation process, the welding wire 61 is located inside the wire feeding trough 821. The welding wire 61 maintains a large contact area with the upper belt 81 and the lower belt 82, and has a large friction force. On the one hand, the welding wire 61 can be transported forward quickly. On the other hand, since the materials of the upper belt 81 and the lower belt 82 are relatively soft (such as rubber material), the welding wire 61 will not be squeezed and deformed, thereby ensuring welding stability.

[0070] 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 caught, which is quite dangerous. Therefore, the following technical solution is proposed.

[0071] Specifically, if Figure 6-Figure 15 As shown, a wire pressing assembly 9 and a transmission assembly 100 are respectively provided at the front and lower positions 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 feeding direction of the welding wire 61. The wire pressing assembly 9 includes a wire pressing rod 90. A wire clamping groove 901 is provided at the lower surface of the wire pressing rod 90. The wire clamping groove 901 is used to clamp the end of the welding wire 61.

[0072] Furthermore, the screw pressing assembly 9 also includes a base 91, the upper end of which is vertically and movably connected to a movable rod 92. An elastic component 1 94 is provided inside the base 91, with both ends of the elastic component 1 94 pressing on the bottom of the base 91 and the movable rod 92. The screw pressing rod 90 is rotatably connected to the upper end of the movable rod 92. The elastic component 1 94 is a spring.

[0073] 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 engage with the gear 2 532. The movable rod 92 is fixedly installed on the rack 102.

[0074] It should be noted that after the welding wire 61 is passed through the front wire feed tube 7, the end of the welding wire 61 is inserted into the interior of the wire clamping groove 901. Then, the power component 50 drives the upper belt 81 and the lower belt 82 to transmit, the second gear 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. The welding wire 61 also passes through the upper belt 81 and the lower belt 82 and enters the interior of the wire feed groove 821. It should also be noted that after the wire pressing rod 90 enters between the upper belt 81 and the lower belt 82, the second gear 532 and the rack 102 disengage, 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 delivered to the rear wire feed tube 71, the welding wire 61 is passed through the rear wire feed tube 71.

[0075] 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 close to the upper belt 81 and the lower belt 82 when threading the welding wire 61, thereby effectively avoiding the risk of fingers being entangled.

[0076] Furthermore, if Figures 9-11 As shown, the upper end of the movable rod 92 is rotatably connected to a rotating sleeve 93, and 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. 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.

[0077] It should be noted that after the wire pressing rod 90 draws 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 the side of the positioning column 902. In this way, 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.

[0078] Furthermore, if Figures 9-11As shown, fixed columns 103 are fixedly connected to both sides of the wire feeder 41. The slide rail 101 is movably mounted on the fixed columns 103. A second elastic component 104 is mounted on the fixed columns 103. The second elastic component 104 presses on the wire feeder 41 and the slide rail 101. A positioning rod 105 is fixedly mounted on the side of the wire feeder 41 close to the wire reel 6. The positioning rod 105 is provided with a slot 106. A block 107 is fixedly connected to the bottom of the rack 102. The second elastic component 104 is a spring.

[0079] It should be noted that a handle is installed on the rack 102. By pulling the handle outward, the slide rail 101 and the rack 102 can be moved to the front side of the gear 2 532, and then the rack 102 can be pushed in the direction of the front wire feeding tube 7. During the pushing process, the rack 102 will not engage with the gear 2 532. After the rack 102 moves into place, the handle is released. Under the action of the elastic component 2 104, the slide rail 101 and the rack 102 are reset, and the block 107 at the bottom of the rack 102 enters the interior of the slot 106, so that during the welding process, the rack 102 will not change position due to vibration.

[0080] Furthermore, if Figure 12 As shown, a positioning block 110 is fixedly connected to the outer surface of the rear wire feeding tube 71 , and a positioning groove 111 is opened on the outer surface of one side of the wire feeding frame 41 , and the positioning block 110 is rotatably engaged in the positioning groove 111 .

[0081] It should be noted that when the wire pressing rod 90 pulls the welding wire 61 to the position of the rear wire feeding tube 71, it is inconvenient to manually insert the welding wire 61 into the rear wire feeding tube 71 because the rear wire feeding tube 71 is close to the upper belt 81 and the lower belt 82. Therefore, before pulling the welding wire 61, the rear wire feeding tube 71 can be rotated, the positioning block 110 moves out of the positioning groove 111, and then the rear wire feeding tube 71 is pulled to the left to move the rear wire feeding tube 71 away from the upper belt 81 and the lower belt 82, thereby increasing the distance and facilitating the insertion of the welding wire 61. After the welding wire 61 is inserted, the rear wire feeding tube 71 can be restored to its original position.

[0082] Furthermore, if Figure 12-15 As shown, the front wire feeding tube 7 can be slidably inserted into the movable frame 4, and the interior of the front wire feeding tube 7 away from one end of the rear wire feeding tube 71 is fixedly connected with an air bag 120, and the air bag 120 is a flexible annular structure. The welding wire 61 passes through the middle of the annular structure of the air bag 120, and one end of the air bag 120 extends to the outer surface of the front wire feeding tube 7 to form an outer protrusion 121. One side of the wire feeding frame 41 is fixedly connected with a pressure plate 122, and the end of the pressure plate 122 close to the wire feeding frame 41 has an avoidance groove 123, and the other end of the pressure plate 122 has an upper inclined portion 124, and the outer protrusion 121 is squeezed and contacted with the pressure plate 122, wherein the air bag 120 and the outer protrusion 121 are integrated, and the interiors of the two are connected.

[0083] It should be noted that, since the end of the front wire feeding tube 7 is 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 outer protrusion 121 is located at the position of the upper inclined portion 124. At this time, the outer protrusion 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. The welding wire 61 is inserted into the airbag 120 and passes through the left end of the front wire feeding tube 7, and then the front wire feeding tube 7 is pushed to the left relative to the movable frame 4 so that the outer protrusion 121 is just in contact with the pressure plate 122. At this time, the outer protrusion 121 is squeezed and the airbag 120 presses the welding wire 61. Then, the wire pressing rod 90 is used to pull the welding wire 61. At this time, the front wire feed tube 7 also moves accordingly. When the outer protrusion 121 moves to the position of the avoidance groove 123, the outer protrusion 121 is no longer squeezed, and the welding wire 61 can pass through the air bag 120. The front wire feed tube 7 moves into place and does not move further. This allows the welding wire reel 6 to automatically move to the left during the pulling process, thereby preventing the welding wire 61 from extending too far from the front wire feed tube 7 during the pulling process, causing the welding wire 61 to deviate between the upper belt 81 and the lower belt 82.

[0084] Refer to the instruction manual Figure 16 The method of using the above-mentioned mechanical carbon dioxide shielded welding device comprises the following steps:

[0085] Step 1: Install the welding wire reel 6 on the mobile frame 4;

[0086] Step 2: Pass the welding wire 61 on the wire reel 6 through the front wire feed tube 7, between the lower wire feed wheel 51 and the upper wire feed wheel 52, and the rear wire feed tube 71 in sequence;

[0087] Step 3: Use the welding gun 3 to weld the workpiece. During the welding process, the power component 50 drives the two lower wire feed rollers 51 and the two upper wire feed rollers 52 to rotate, thereby feeding the welding wire 61 to the welding gun 3;

[0088] In step 2, when the welding wire 61 on the welding wire reel 6 passes between the lower wire feeding wheel 51 and the upper wire feeding wheel 52, the following steps are specifically included:

[0089] S1: clamp the end of the welding wire 61 in the wire pressing rod 90;

[0090] S2: The power component 50 drives the two lower wire feeding rollers 51 and the two upper wire feeding rollers 52 to rotate, and the wire pressing rod 90 brings the welding wire 61 into between the upper belt 81 and the lower belt 82, thereby pressing the welding wire 61 into the wire feeding groove 821;

[0091] S3: After the welding wire 61 passes through the upper belt 81 and the lower belt 82 , the end of the welding wire 61 is removed from the wire slot 901 .

[0092] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A mechanical carbon dioxide shielded welding device, characterized in that: The invention 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 for conveying shielding gas to the welding gun (3); It also includes a mobile frame (4), a wire feeding frame (41) is installed on the mobile frame (4), and a wire feeding assembly (5) is installed on the wire feeding frame (41); The wire feeding frame (41) is provided with a wire pressing assembly (9) and a transmission assembly (100), the transmission assembly (100) is used to drive the wire pressing assembly (9) to move along the feeding direction of the welding wire (61), the wire pressing assembly (9) includes a wire pressing rod (90), and a wire clamping groove (901) is provided at the lower surface of the wire pressing rod (90), and the wire clamping groove (901) is used to clamp the end of the welding wire (61); 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), and the front wire feeding tube (7) can be slidably inserted into the movable frame (4), and an air bag (120) is fixedly connected to the interior of the front wire feeding tube (7) away from one end of the rear wire feeding tube (71), and the welding wire (61) passes through the middle of the annular structure of the air bag (120), and one end of the air bag (120) extends to the outer surface of the front wire feeding tube (7) to form an outer convex portion (121), and a pressure plate (122) is fixedly connected to one side of the wire feeding frame (41), and an end of the pressure plate (122) close to the wire feeding frame (41) has an avoidance groove (123), and the other end of the pressure plate (122) has an upper inclined portion (124), and the outer convex portion (121) is squeezed and contacted with the pressure plate (122), wherein the air bag (120) and the inner part of the outer convex portion (121) are connected; The outer convex portion (121) moves to the position of the upper inclined portion (124) or the avoidance groove (123), the outer convex portion (121) is no longer squeezed, the welding wire (61) passes through the middle of the airbag (120), and when the outer convex portion (121) is in contact with the pressure plate (122), the outer convex portion (121) is squeezed, and the airbag (120) presses the welding wire (61).

2. A mechanical carbon dioxide shielded welding device according to claim 1, characterized in that: The wire feeding assembly (5) comprises a plurality of upper wire feeding wheels (52) and lower wire feeding wheels (51), wherein the upper wire feeding wheels (52) and the lower wire feeding wheels (51) correspond to each other one by one, and the plurality of lower wire feeding wheels (51) are connected to each other through a gear transmission component (53), so that the transmission directions of the plurality of lower wire feeding wheels (51) are the same, and the plurality of upper wire feeding wheels (52) are connected to each other through a belt transmission component (54), so that the plurality of upper wire feeding wheels (52) and the lower wire feeding wheels (51) are connected to each other The wheels (51) are driven in opposite directions. A welding wire reel (6) is mounted on the movable frame (4). The welding wire (61) is stored on the welding wire reel (6). The welding wire (61) passes between a plurality of lower wire feeding wheels (51) and a plurality of upper wire feeding wheels (52) and is transported to the welding gun (3). Two lower wire feeding wheels (51) and two upper wire feeding wheels (52) are provided, and the upper wire feeding wheel (52) located above and the lower wire feeding wheel (51) located below 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) includes two gear ones (531), the two gear ones (531) are fixedly connected to the two lower wire feeding wheels (51), a gear two (532) is provided between the two gear ones (531), 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).

4. The mechanical carbon dioxide shielded welding device according to claim 3, characterized in that: 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 on the three pulleys (541) are provided with belts (542). The three pulleys (541) are connected by the belts (542) so that the two upper wire feeding wheels (52) and the gear 2 (532) rotate in the same direction.

5. The 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. The 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 one notch (4121) is provided on both ends of the disassembly frame (412), wherein the one notch (4121) is aligned with the two notches (4122), and a locking handle (413) is provided on both ends of the disassembly frame (412), wherein the locking handle (413) is pressed on the upper surface of the disassembly frame (412), and the lower end of the locking handle (413) passes through the one notch (4121) and the two notches (4122) and is threadedly connected to the base frame (411).

7. The mechanical carbon dioxide shielded welding device according to claim 6, characterized in that: 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 7, 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 8, characterized in that: The gas cylinder (2) contains high-pressure liquid carbon dioxide, which is converted into gaseous form by 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 claim 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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