High strength corrosion resistant solid wire and method of manufacture

Abstract

The present application relates to welding wire preparation technical field, specifically, it relates to a kind of high-strength corrosion-resistant solid welding wire and production method.It includes reinforcing welding wire, reinforcing welding wire at least includes welding wire layer and protective layer, the present application can remove the oxide layer on the surface of welding wire in advance by adding manganese dioxide and flux, so that manganese can enter welding wire, improve the manganese addition amount in welding wire, improve the toughness of weld, improve the strength of weld, and the protective layer is provided to isolate oxygen, improve the corrosion resistance of welding wire.The present application simultaneously relates to a kind of cutting device suitable for the production of the above-mentioned high-strength corrosion-resistant solid welding wire, it includes fixing device and the shearing device being arranged in the side of fixing device, compared with the common welding wire cutting device, before realizing automatic feeding effect, the straightening of welding wire can only be carried out after, it is not necessary to carry out straightening operation to welding wire after shearing, greatly improve work efficiency and save process.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of welding wire preparation, in particular to a high-strength corrosion-resistant solid welding wire and a manufacturing method thereof. BACKGROUND

[0002] Welding wire is a metal wire welding material used as filler metal and for electrical conduction, and is a filler metal in the fusion welding methods such as submerged arc welding, electroslag welding, gas shielded welding, and gas welding. The welding wire melts to form a weld joint with the liquid base metal. However, the existing welding wire has insufficient strength and poor mechanical properties. When welding steel plates, the weld joint formed by the welding wire is prone to cracking, thereby affecting the welding effect of the steel plate. In addition, the welding wire needs to be cleaned before use to avoid rusting. During use, the carbide in the welding wire material precipitates during the welding process, forming electrochemical corrosion, which results in poor corrosion resistance of the weld joint. Therefore, a high-strength corrosion-resistant solid welding wire and a manufacturing method thereof are proposed. After the welding wire is produced, it needs to be cut for later use. The existing welding wire cutting device usually cuts the welding wire into long welding wires, and then bundles and cuts the long welding wires. This method has the disadvantages of poor straightening effect, low production efficiency, large welding wire wear, and poor stability. Therefore, a device for straightening the welding wire during cutting is needed. SUMMARY

[0003] The present application aims to provide a high-strength corrosion-resistant solid welding wire and a manufacturing method thereof to solve the problems in the background.

[0004] To achieve the above-mentioned purpose, the present application provides a high-strength corrosion-resistant solid welding wire, which comprises a reinforcing welding wire. The reinforcing welding wire comprises a welding wire layer and a protective layer. The outer surface of the welding wire layer is coated with the protective layer. The welding wire layer comprises a center wire and a tensile sleeve arranged around the center wire. The tensile sleeve is a circular ring structure formed by twisting a plurality of tensile wires.

[0005] As a further improvement of the present technical solution, the reinforcing agent is manganese dioxide, and the flux is rosin flux.

[0006] In the present application, by adding manganese dioxide, manganese dioxide reacts with sulfur in the welding wire to form manganese sulfide and remove sulfur. By adding manganese to the welding wire, the strength of the weld joint can be improved during welding to prevent cracking and ensure the welding effect of the steel plate. The addition of flux can remove the oxide layer on the surface of the welding wire, which plays a lubricating role during welding, facilitating the welding of the steel plate. In addition, the pre-removal of the oxide layer on the surface of the welding wire by the flux can facilitate the entry of manganese into the welding wire, thereby increasing the amount of manganese added to the welding wire and improving the toughness of the weld joint to achieve the purpose of improving the strength.

[0007] As a further improvement of the technical solution, in the S1, the preheating temperature of the smelting furnace is 250 degrees Celsius.

[0008] As a further improvement of the technical solution, in the S2, the metal surface is smoothed by anodic electrolysis by placing the wire blank into an electrolytic polishing solution.

[0009] In order to reduce the wear and tear of the high-strength corrosion-resistant solid welding wire in the subsequent production process and improve the production stability, a cutting device with straightening function for welding wire production is provided for the manufacturing method of the high-strength corrosion-resistant solid welding wire.

[0010] The device comprises a fixing device and a shearing device arranged on one side of the fixing device, the fixing device comprises a clamping mechanism, the clamping mechanism comprises two clamping plates, the two clamping plates are used to clamp and fix the welding wire, and the welding wire is straightened when the end of the welding wire away from the clamping plate is pressed tightly, one side of the clamping plate is provided with a clamping structure, the clamping structure is used to drive the clamping plate to reciprocate in the horizontal direction, the shearing device comprises a shearing mechanism, the shearing mechanism comprises a pressing plate, the bottom of the pressing plate is provided with a supporting plate, one side of the pressing plate is provided with a shearing structure, and the shearing structure is used to drive the pressing plate and the supporting plate to move.

[0011] As a further improvement of the technical solution, the fixing device further comprises a fixing mechanism, the fixing mechanism comprises a base, one side of the top of the base is provided with a steering gear set, the steering gear set is composed of two rotating gears meshing with each other, the two rotating gears are rotationally connected with the base, the top end of one of the rotating gears is fixedly connected with a rotating column, one side of the rotating column is provided with a driven column, the driven column is rotationally connected with the base, and the other rotating gear and the driven column are connected through a belt.

[0012] As a further improvement of the technical solution, the clamping structure comprises a clamping block, the clamping block is fixedly connected with the clamping plate, one side of the clamping block is provided with a plug rod, one end of the plug rod is hinged with the clamping block, the other end of the plug rod is sleeved with a clamping rod, one end of one of the clamping rods is fixedly connected with the rotating column, and one end of the other clamping rod is fixedly connected with the driven column.

[0013] As a further improvement of the technical solution, one side of the driven column is provided with a motor rack, the bottom end of the motor rack is fixedly connected with the base, the top end of the fixing mechanism is fixedly provided with a driving motor, and the output shaft of the driving motor and one end of the clamping rod rotate synchronously.

[0014] As a further improvement of the technical solution, one end of the plug rod is fixedly connected with a clamping spring, the clamping spring is used to give the plug rod a pushing force, so that the plug rod and the clamping block always press the clamping plate on the welding wire.

[0015] As a further improvement of the technical solution, the shearing structure comprises a shearing motor, one side of the shearing motor is provided with a fixed plate, the shearing motor is fixedly arranged on one side of the fixed plate, the fixed plate and the positioning plate are fixedly connected, one side of the fixed plate is rotatably connected with a driving gear, the output shaft of the shearing motor is coaxially connected with the driving gear, one end of the driving gear is fixedly connected with a pressing rod, one end of the pressing rod is fixedly connected with the pressing plate.

[0016] As a further improvement of the technical solution, the bottom of the driving gear is engaged with a driven gear, the driven gear is rotatably connected with the fixed plate, one end of the driven gear is fixedly connected with a supporting rod, one end of the supporting rod is fixedly connected with the supporting plate.

[0017] Compared with the prior art, the present application has the following advantages:

[0018] 1. In the high-strength corrosion-resistant solid welding wire and the manufacturing method, manganese is added to the welding wire, the amount of manganese in the welding wire is increased, the toughness of the welding seam is improved, and the strength of the welding seam is improved.

[0019] 2. In the high-strength corrosion-resistant solid welding wire and the manufacturing method, micron-sized titanium dioxide and nanometer-sized cerium oxide are added to the soaking liquid, which can be uniformly distributed during welding of the metal, promote the refinement and spheroidization of inclusions, make the inclusions more uniformly distributed, inhibit proeutectoid ferrite and promote the formation of acicular ferrite, refine the grains, thereby improving the strength of the welding seam and improving the toughness of the structure, and improving the mechanical properties of the welding seam, and the welding efficiency is higher.

[0020] 3. In the cutting device for welding wire production with straightening function used in the high-strength corrosion-resistant solid welding wire and the manufacturing method, the clamping plate is clamped and fixed to the welding wire and the feeding operation is completed under the cooperation of the clamping rod, the inserting rod, the clamping spring and the clamping block. When feeding, the end of the welding wire is positioned by the limiting groove to avoid deviation of the welding wire during movement. After the welding wire is clamped and fixed by the pressing plate and the supporting plate, the clamping plate moves in the opposite direction to straighten the welding wire. Compared with the common welding wire cutting device, the straightening of the welding wire can be realized before and after the automatic feeding effect, and the straightening operation of the welding wire after shearing is not required, which greatly improves the work efficiency and saves the process. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 The reinforcing welding wire structure of the present application is shown in the figure.

[0022] Figure 2 The overall structure of the welding wire production cutting device with straightening function is shown in the figure.

[0023] Figure 3The structure diagram of the fixing device of the cutting device for welding wire production with straightening function;

[0024] Figure 4 The structure diagram of the fixing mechanism of the cutting device for welding wire production with straightening function;

[0025] Figure 5 The structure diagram of the clamping mechanism of the cutting device for welding wire production with straightening function;

[0026] Figure 6 The structure diagram of the shearing device of the cutting device for welding wire production with straightening function;

[0027] Figure 7 The structure diagram of the positioning mechanism of the cutting device for welding wire production with straightening function;

[0028] Figure 8 The structure diagram of the cutting device for welding wire production with straightening function.

[0029] The meanings of the various reference numbers in the drawings are as follows: 01, center wire; 02, tensile sleeve; 03, protective layer; 1, fixing device; 11, fixing mechanism; 111, base; 112, steering gear set; 113, rotating column; 114, motor frame; 115, driving motor; 116, driven column; 12, clamping mechanism; 121, clamping rod; 122, insertion rod; 123, clamping spring; 124, clamping block; 125, clamping plate; 2, shearing device; 21, positioning mechanism; 211, positioning plate; 212, fixed block; 213, limiting block; 214, limiting groove; 215, fixed plate; 22, shearing mechanism; 221, shearing motor; 222, driving gear; 223, driven gear; 224, pressing rod; 225, pressing plate; 226, supporting rod; 227, supporting plate. DETAILED DESCRIPTION

[0030] Please refer to Figures 1-8 The embodiment aims to provide a high-strength corrosion-resistant solid welding wire, which comprises a reinforcing welding wire, and the reinforcing welding wire at least comprises a welding wire layer and a protective layer 03. The outer surface of the welding wire layer is coated with the protective layer 03. The welding wire layer comprises a center wire 01 and a tensile sleeve 02 arranged on the periphery of the center wire 01. The tensile sleeve 02 is a circular ring structure formed by twisting a plurality of tensile wires. The tensile sleeve 02 is arranged on the outer surface of the center wire 01. The combination of the core and the sleeve can improve the bending performance of the reinforcing welding wire and increase the tensile strength. The protective layer 03 can prevent the reinforcing welding wire from being corroded during storage;

[0031] The reinforcing welding wire comprises the following raw materials by weight: 5-8 parts of carbon, 6-10 parts of silicon, 36-40 parts of chromium, 47-51 parts of nickel, 11-14 parts of copper, 8-11 parts of titanium, 3-6 parts of boron, 2-5 parts of sulfur and 7-11 parts of reinforcing agent.

[0032] In the application, by adding manganese dioxide, manganese dioxide and sulfur in the welding wire are combined to form manganese sulfide and desulfurize, by adding manganese to the welding wire, the strength of the weld can be improved when the welding is formed into a weld, the weld cracking is avoided, the welding effect of the steel plate is ensured, the oxidation layer on the surface of the welding wire can be removed by the flux, the flux plays a lubricating role during welding, the welding of the steel plate is facilitated, and the oxidation layer on the surface of the welding wire is removed in advance by the flux, manganese can enter the welding wire, thereby increasing the amount of manganese added to the welding wire, improving the toughness of the weld, and achieving the purpose of improving the strength.

[0033] In order to reduce the wear of the high-strength corrosion-resistant solid welding wire in the subsequent production process and improve the production stability, the embodiment of the application further provides a cutting device with straightening function for welding wire production of the high-strength corrosion-resistant solid welding wire.

[0034] The cutting device comprises a fixing device 1 and a shearing device 2 arranged on one side of the fixing device 1, and the fixing device comprises a clamping mechanism 12, the clamping mechanism 12 comprises two clamping plates 125, the two clamping plates 125 are used for clamping and fixing the high-strength corrosion-resistant solid welding wire, and the welding wire is straightened when the welding wire is pressed at one end away from the clamping plate 125, one side of the clamping plate 125 is provided with a clamping structure, and the clamping structure is used for driving the clamping plate 125 to reciprocate in the horizontal direction.

[0035] The fixing device 1 further comprises a fixing mechanism 11, the fixing mechanism 11 comprises a base 111, one side of the top of the base 111 is provided with a steering gear set 112, the steering gear set 112 is composed of two mutually meshing rotating gears, the two rotating gears are rotationally connected with the base 111, the top end of one of the rotating gears is fixedly connected with a rotating column 113, the steering gear set 112 is used for driving the rotating column 113 to rotate, one side of the rotating column 113 is provided with a driven column 116, the driven column 116 is used for driving the steering gear set 112 to rotate, the driven column 116 is rotationally connected with the base 111, and the other rotating gear and the driven column 116 are connected through a belt, and the base 111 is used for determining the positions of the steering gear set 112 and the driven column 116.

[0036] The clamping structure comprises clamping blocks 124 for moving the clamping plates 125, the clamping blocks 124 and the clamping plates 125 are fixedly connected, one side of the clamping blocks 124 is provided with an insertion rod 122 for moving the clamping blocks 124, one end of the insertion rod 122 is hingedly connected with the clamping blocks 124, the other end of the insertion rod 122 is sleeved with a clamping rod 121 for rotating the insertion rod 122 and enabling the insertion rod 122 to slide in the inside of the clamping rod 121, one end of one of the clamping rods 121 is fixedly connected with the rotating column 113, and one end of the other clamping rod 121 is fixedly connected with the driven column 116;

[0037] One side of the driven column 116 is provided with a motor bracket 114, the bottom end of the motor bracket 114 is fixedly connected with the base 111, the top end of the fixing mechanism 11 is fixedly provided with a driving motor 115, the motor bracket 114 is used for determining the position of the driving motor 115, the driving motor 115 is used for rotating the clamping rod 121, and the output shaft of the driving motor 115 is synchronously rotated with one end of the clamping rod 121;

[0038] One end of the insertion rod 122 is fixedly connected with a clamping spring 123, the clamping spring 123 is used for giving the insertion rod 122 a pushing force, so that the insertion rod 122 and the clamping block 124 cooperate to always press the clamping plate 125 on the welding wire;

[0039] The welding wire is placed between the two clamping plates 125, the driving motor 115 drives one of the clamping rods 121 to rotate, the clamping rod 121 drives the driven column 116 to rotate, the driven column 116 drives the steering gear set 112 to rotate through the belt, the steering gear set 112 changes the rotating direction through the cooperation of the two rotating gears, so that the rotating column 113 is synchronously rotated in the opposite direction of the driven column 116, the rotating column 113 drives the other clamping rod 121 to rotate, the clamping spring 123 applies a pushing force to the insertion rod 122, the insertion rod 122 is directly affected by the pushing force to the clamping block 124, the clamping block 124 pushes the clamping plate 125 to fix the welding wire, and the driving motor 115 continuously rotates to make the clamping plate 125 continuously move the welding wire;

[0040] When the welding wire is tightly fixed away from the clamping plate 125, the driving motor 115 drives the clamping rod 121 to rotate in the opposite direction, the driving motor 115 always clamps the side wall of the welding wire under the cooperation of the clamping spring 123, the clamping block 124 and the insertion rod 122, at this time, the clamping plate 125 slides on the surface of the welding wire to straighten the welding wire.

[0041] Considering the need to fix the welding wire when straightening the welding wire, and the need to cut the welding wire after straightening the welding wire, the cutting device 2 comprises a cutting mechanism 22, the cutting mechanism 22 comprises a pressing plate 225, the pressing plate 225 is used to apply a downward pressure to the welding wire from the top of the welding wire, the bottom of the pressing plate 225 is provided with a supporting plate 227, the supporting plate 227 is used to apply an upward pressure to the welding wire from the bottom of the welding wire, the pressing plate 225 and the supporting plate 227 cooperate to complete the clamping and cutting of the welding wire, one side of the pressing plate 225 is provided with a cutting structure, the cutting structure is used to drive the pressing plate 225 and the supporting plate 227 to move;

[0042] The cutting device 2 further comprises a positioning mechanism 21, the positioning mechanism 21 comprises two positioning plates 211, the positioning plates 211 are fixedly arranged at the top end of the base 111, one side of the two positioning plates 211 is provided with a limiting block 213, the limiting block 213 is used to cooperate with the clamping plate 125 to straighten the welding wire, and to prevent the welding wire from deviating during initial cutting, the limiting block 213 is fixedly connected with a fixed block 212 at both sides of one end of the limiting block 213, the fixed block 212 is fixedly connected with the positioning plate 211, and the positioning plate 211 is used to fix the position of the fixed block 212;

[0043] When the clamping plate 125 completes the operation of driving the welding wire to move once, one end of the clamping plate 125 abuts one end of the limiting block 213; the limiting block 213 is provided with a limiting groove 214 in the inside, the limiting groove 214 is used to position and preliminarily straighten the welding wire when the welding wire passes through, and the limiting groove 214 penetrates through the limiting block 213;

[0044] The appropriate position of the welding wire is placed in the two clamping plates 125, at this time, the end of the welding wire exceeds the appropriate length of the clamping plate 125, so as to avoid that the end of the welding wire is inclined due to gravity when the clamping plate 125 moves with the welding wire, and the welding wire is fixed under the cooperation of the clamping rod 121, the inserting rod 122, the clamping spring 123 and the clamping block 124, when the clamping plate 125 moves to the position closest to the limiting block 213, the end of the welding wire penetrates through the inner wall of the limiting groove 214, and the limiting groove 214 preliminarily straightens and preliminarily positions the welding wire when the welding wire passes through the inner wall of the limiting groove 214;

[0045] When the end of the welding wire is tightly fixed, the clamping plate 125 gradually moves away from the limiting block 213, and the clamping spring 123 cooperates with the clamping plate 125 to straighten the middle position of the welding wire.

[0046] The shearing structure comprises a shearing motor 221, one side of the shearing motor 221 is provided with a fixed plate 215, the shearing motor 221 is fixedly arranged on one side of the fixed plate 215, the fixed plate 215 and the positioning plate 211 are fixedly connected, one side of the fixed plate 215 is rotatably connected with a driving gear 222, the output shaft of the shearing motor 221 is coaxially connected with the driving gear 222, one end of the driving gear 222 is fixedly connected with a pressing rod 224, the pressing rod 224 is used for driving a pressing plate 225 to rotate, one end of the pressing rod 224 is fixedly connected with the pressing plate 225;

[0047] The bottom of the driving gear 222 is engaged with a driven gear 223, the driving gear 222 is used for driving the pressing rod 224 and the driven gear 223 to rotate, the driven gear 223 is rotatably connected with the fixed plate 215, one end of the driven gear 223 is fixedly connected with a supporting rod 226, the driven gear 223 is used for driving the supporting rod 226 to rotate, one end of the supporting rod 226 is fixedly connected with a supporting plate 227;

[0048] When the clamping plate 125 moves in the direction of the limiting block 213 with the welding wire, the shearing motor 221 drives the driving gear 222 to rotate, the driving gear 222 drives the pressing rod 224 to rotate, the pressing rod 224 drives the pressing plate 225 to rotate, at the same time, the driving gear 222 drives the driven gear 223 to rotate, the driven gear 223 drives the supporting rod 226 to rotate, the supporting rod 226 drives the supporting plate 227 to rotate, the pressing plate 225 and the supporting plate 227 gradually move to each other, and the pressing plate 225 and the supporting plate 227 cooperate to press and fix the welding wire, at this time, the clamping plate 125 moves away from the limiting block 213, when the clamping plate 125 moves to the position farthest away from the limiting block 213, the shearing motor 221 drives the pressing plate 225 and the supporting plate 227 to move through the driving gear 222, the pressing rod 224, the driven gear 223 and the supporting rod 226, so as to shear the welding wire, the limiting groove 214 positions the end of the welding wire before shearing, so as to avoid the welding wire from deviating, and the clamping plate 125 and the limiting groove 214 cooperate to position the welding wire during shearing, so as to avoid the welding wire from shaking under stress during shearing;

[0049] After the welding wire is sheared, the shearing motor 221 drives the pressing plate 225 and the supporting plate 227 to move through the driving gear 222, the pressing rod 224, the driven gear 223 and the supporting rod 226, so that the pressing plate 225 and the supporting plate 227 gradually move away from the welding wire, at this time, the clamping plate 125 can drive the welding wire to move again, compared with the common welding wire cutting device, manual feeding is not needed, a large amount of human resources is saved, and the welding wire is positioned before shearing, so as to complete straightening of the welding wire.

[0050] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only preferred examples of the present application and are not intended to limit the present application. Various changes and improvements can be made to the present application without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A high strength corrosion resistant solid welding wire characterized by: The reinforcing welding wire comprises at least a welding wire layer and a protective layer (03), the welding wire layer is coated with the protective layer (03) on the outside, the welding wire layer comprises a center wire (01) and a tensile sleeve (02) arranged on the periphery of the center wire (01), and the tensile sleeve (02) is a circular structure formed by twisting a plurality of tensile wires. The reinforcing welding wire comprises the following raw materials by weight: 5-8 parts of carbon, 6-10 parts of silicon, 36-40 parts of chromium, 47-51 parts of nickel, 11-14 parts of copper, 8-11 parts of titanium, 3-6 parts of boron, 2-5 parts of sulfur, 7-11 parts of reinforcing agent and 5-8 parts of fluxing agent, the reinforcing agent is manganese dioxide, and the fluxing agent is rosin fluxing agent.

2. A cutting device for the production of welding wire with straightening function for high-strength corrosion-resistant solid welding wire as claimed in claim 1, characterized in that: The fixing device (1) comprises a clamping mechanism (12), the clamping mechanism (12) comprises two clamping plates (125), the two clamping plates (125) are used for clamping and fixing the welding wire, and the welding wire is straightened when the welding wire is pressed at the end away from the clamping plate (125), one side of the clamping plate (125) is provided with a clamping structure, the clamping structure is used for driving the clamping plate (125) to reciprocate in the horizontal direction, and the shearing device (2) comprises a shearing mechanism (22), the shearing mechanism (22) comprises a pressing plate (225), the bottom of the pressing plate (225) is provided with a supporting plate (227), one side of the pressing plate (225) is provided with a shearing structure, and the shearing structure is used for driving the pressing plate (225) and the supporting plate (227) to move. The fixing device (1) further comprises a fixing mechanism (11), the fixing mechanism (11) comprises a base (111), one side of the top of the base (111) is provided with a steering gear set (112), the steering gear set (112) is composed of two rotating gears that are meshed with each other, the two rotating gears are rotationally connected with the base (111), the top end of one of the rotating gears is fixedly connected with a rotating column (113), one side of the rotating column (113) is provided with a driven column (116), the driven column (116) is rotationally connected with the base (111), and the other rotating gear is connected with the driven column (116) through a belt. The clamping structure comprises a clamping block (124), the clamping block (124) is fixedly connected with the clamping plate (125), one side of the clamping block (124) is provided with an insertion rod (122), one end of the insertion rod (122) is hingedly connected with the clamping block (124), one end of the insertion rod (122) is fixedly connected with a clamping spring (123), the clamping spring (123) is used for providing a pushing force for the insertion rod (122), so that the insertion rod (122) and the clamping block (124) are always pressed on the welding wire in cooperation; the other end of the insertion rod (122) is sleeved with a clamping rod (121), one end of one of the clamping rods (121) is fixedly connected with the rotating column (113), and one end of the other clamping rod (121) is fixedly connected with the driven column (116).

3. The cutting device with straightening function for welding wire production according to claim 2, characterized in that: The shearing device (2) further comprises a positioning mechanism (21), the positioning mechanism (21) comprises two positioning plates (211), the positioning plates (211) are fixedly arranged at the top end of the base (111), one side of the two positioning plates (211) is provided with a limiting block (213), both sides of one end of the limiting block (213) are fixedly connected with a fixed block (212), the fixed block (212) is fixedly connected with the positioning plate (211), the positioning plate (211) is used for fixing the position of the fixed block (212), when the clamping plate (125) completes the operation of driving the welding wire to move once, one end of the clamping plate (125) and one end of the limiting block (213) are attached; a limiting groove (214) is arranged in the limiting block (213).

4. The cutting device with straightening function for welding wire production according to claim 3, characterized in that: The shearing structure comprises a shearing motor (221), one side of the shearing motor (221) is provided with a fixed plate (215), the shearing motor (221) is fixedly arranged on one side of the fixed plate (215), the fixed plate (215) and the positioning plate (211) are fixedly connected, one side of the fixed plate (215) is rotatably connected with a driving gear (222), the output shaft of the shearing motor (221) and the driving gear (222) are coaxially connected, one end of the driving gear (222) is fixedly connected with a pressing rod (224), one end of the pressing rod (224) and a pressing plate (225) are fixedly connected; the bottom of the driving gear (222) is engaged with a driven gear (223), the driven gear (223) and the fixed plate (215) are rotatably connected, one end of the driven gear (223) is fixedly connected with a supporting rod (226), one end of the supporting rod (226) and a supporting plate (227) are fixedly connected.

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