Argon arc welding wire receiving and feeding mechanism for large reactor machining

Abstract

The invention discloses an argon arc welding wire receiving and feeding mechanism for large reactor machining, and relates to the technical field of reactor welding. The feeding part is installed at the bottom of the welding gun and used for storing welding wires, the feeding part comprises a connecting frame fixedly installed at the bottom of the welding gun, a storage box for storing the welding wires is fixedly installed on the connecting frame, and a pressing assembly and a pushing assembly which are matched with the welding wires are installed on the storage box; and the feeding part is mounted at the bottom of the welding gun. The device has the advantages that strip-shaped welding wires with different thicknesses can be stably and continuously fed, the welding efficiency is effectively improved, the welding wires can be preheated before welding, the temperature difference before welding is reduced, the temperature rising time of the welding wires is shortened, the melting efficiency and the welding efficiency of the welding wires are improved, in addition, the welding wires can be straightened, and the welding quality is improved. The welding wire is kept in a straight state before being welded, and the distance between the welding wire and a welding gun is ensured, so that the welding quality is effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of reactor welding, and in particular to an argon arc welding wire feeding mechanism for processing a large reactor. Background Art

[0002] Large reactors usually refer to large equipment used in chemical engineering, nuclear engineering or other related fields. These equipment are used to carry out various chemical reactions or physical processes. According to different application fields, the types and functions of reactors are also different. These reactors are large in scale, so their sealing is extremely important. For the joints of some reactors, welding sealing is required. Usually, argon arc welding is used for welding of reactors. Since the heat input of argon arc welding is relatively low, it can effectively reduce the thermal deformation generated during the welding process and maintain the integrity and precision of the structure. For the welding of large reactors, this can significantly improve the precision and matching of components. Argon arc welding requires the use of welding guns and welding wires. During the welding process, it is necessary to ensure the stable feeding of welding wires, so it is necessary to cooperate with the wire feeding mechanism to complete it.

[0003] For example, the announcement number CN115815752B discloses a argon arc welding wire feeding device for a robot, which includes a wire feeding body, a body support frame, an angle adjustment device and an adjustment bracket. The wire feeding body includes a wire feeding bracket, and a wire feeding drive device is connected to the wire feeding bracket; the wire feeding device can conveniently adjust the position of the welding wire, is easy to operate, and can effectively meet different welding requirements; Announcement No. CN116748639B discloses a argon arc welding wire feeding device for a robot, which includes a box body, a first rotating shaft is rotatably connected between the inner walls on both sides of the box body, an active roller is fixedly installed on the outer wall of the first rotating shaft, a driving motor is fixedly installed on an outer wall of the box body, one end of the first rotating shaft passes through an inner wall of the box body and is fixedly connected to the output shaft of the driving motor; the wire feeding device can automatically clean the surface of the welding wire in the process of conveying the welding wire, solves the problem that the dust and fine impurities on the surface of the welding wire affect the subsequent welding quality, ensures the welding quality, can automatically vacuum and collect the dust or impurities swept off the surface of the welding wire, has a high degree of automation, can automatically preheat the welding wire, does not need to set up additional preheating equipment, improves work efficiency, does not need manual operation, and compared with the prior art, the overall structure of the present invention is more compact and has strong linkage.

[0004] Although the above-mentioned two wire feeding devices can perform wire feeding operations, the welding wire has two forms, one is a coiled state, and the other is a single straight state. The coiled welding wire is curled, and the straight welding wire may also bend under certain circumstances. The above-mentioned two wire feeding devices cannot straighten the welding wire when feeding the wire, which will cause the welding end of the welding wire to be offset, resulting in a change in the distance between the welding wire and the welding gun, thereby affecting the welding effect. At the same time, it is convenient to feed the coiled welding wire and the feeding technology is relatively mature, but for a single straight welding wire, feeding is difficult. The current feeding method has poor feeding efficiency and stability, and the feeding is discontinuous, which can easily cause wire breakage, thereby affecting the welding quality and welding efficiency.

[0005] Therefore, a novel argon arc welding wire feeding mechanism for processing large reactors can be used to solve the shortcomings of the prior art. Summary of the invention

[0006] The purpose of the present invention is to solve the problems existing in the prior art and to propose an argon arc welding wire feeding mechanism for processing a large reactor.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions: A argon arc welding wire feeding mechanism for processing a large reactor comprises a welding gun and a welding wire; a feeding part, mounted at the bottom of the welding gun and used for storing the welding wire, the feeding part comprising a connecting frame fixedly mounted at the bottom of the welding gun, a storage box for storing the welding wire fixedly mounted on the connecting frame, a pressing assembly and a pushing assembly matched with the welding wire mounted on the storage box; a feeding part, mounted at the bottom of the welding gun and used for receiving the welding wire in the storage box and processing and conveying the welding wire, the feeding part comprising a connecting shell mounted at the bottom of the welding gun through a clamping assembly, a material conveying assembly matched with the welding wire mounted on the connecting shell; a straightening part, mounted at the end of the welding gun and used for straightening the welding wire sent by the feeding part and keeping the spacing between the welding wire and the welding gun stable, the straightening part comprising a fixing clamp fixedly mounted at the end of the welding gun, a straightening assembly matched with the welding wire mounted on the fixing clamp.

[0008] Preferably, the clamping assembly includes an elastic steel plate installed in a U shape inside the storage box to cooperate with the welding wire, the two ends of the elastic steel plate are slidably connected to the storage box, a plurality of rotating rods are rotatably installed on the elastic steel plate, and a pull rod is rotatably installed at one end of the plurality of rotating rods away from the elastic steel plate, two limit plates are fixedly installed on the pull rod, the two limit plates pass through and extend out of the top of the storage box, and a size adjustment mechanism that cooperates with the elastic steel plate is installed on the storage box.

[0009] Preferably, the size adjustment mechanism includes a threaded ring fixedly mounted on the top of the storage box, a bolt is threadedly rotatably mounted on the threaded ring, the bolt penetrates and extends into the interior of the storage box, and one end of the bolt located inside the storage box is rotatably connected to the pull rod.

[0010] Preferably, the pushing assembly includes a motor fixedly mounted on the outside of the storage box, a screw is rotatably mounted on the side wall of the storage box through a bearing, a nut is threadedly rotatably mounted on the screw, a push plate is fixedly mounted on the nut, a cone matching the welding wire is fixedly mounted on the push plate, a telescopic rod is fixedly mounted on the side wall of the storage box, the telescopic end of the telescopic rod is fixedly connected to the push plate, and a circular through hole for the cone to pass through is opened on the side of the storage box.

[0011] Preferably, the clamping assembly comprises a mounting frame fixedly mounted on the bottom of the welding gun, a clamping block matched with the mounting frame is fixedly mounted on the connecting shell, and the mounting frame and the clamping block are fixed by a threaded rod.

[0012] Preferably, the material transmission assembly includes a fixed shell fixedly mounted on the connecting shell, a motor fixedly mounted on the fixed shell, a gear 1 rotatably mounted on the fixed shell, a driving wheel matching the welding wire fixedly mounted on the gear 1, a pressure block rotatably mounted on the fixed shell, a driven wheel rotatably mounted on the pressure block, a gear 2 meshing with the gear 1 fixedly mounted on the driven wheel, a limiting sleeve matching the welding wire fixedly mounted on the fixed shell, a pressure regulating mechanism installed between the pressure block and the fixed shell, and a heating mechanism matching the welding wire installed on the connecting shell.

[0013] Preferably, the pressure regulating mechanism includes an adjusting screw rotatably mounted on a fixed shell, a threaded sleeve is threadedly rotatably mounted on the adjusting screw, the threaded sleeve is slidingly connected to the fixed shell, a pressure spring is fixedly mounted on the threaded sleeve, and the pressure spring is fixedly connected to the pressure block.

[0014] Preferably, the heating mechanism includes a heating module fixedly mounted on a connecting shell, a heating ring fixedly mounted inside the connecting shell, the heating ring is sleeved on the welding wire, the heating module and the heating ring are heated by a heating resistor, and a cooling fan is fixedly mounted outside the connecting shell.

[0015] Preferably, the straightening assembly includes a straightening cylinder fixedly mounted on a fixing clamp, a plurality of connecting plates being slidably mounted inside the straightening cylinder, a plurality of straightening wheels cooperating with the welding wire being rotatably mounted on each of the connecting plates, and a scaling mechanism cooperating with the plurality of connecting plates being mounted on the straightening cylinder.

[0016] Preferably, the scaling mechanism includes a plurality of threaded rings rotatably mounted on the straightening cylinder through thread grooves, an adjusting cylinder being commonly fixedly mounted on the plurality of threaded rings, a pushing ring being rotatably mounted on each of the threaded rings, each of the pushing rings being slidably connected to the straightening cylinder, a plurality of wedge blocks being fixedly mounted on each of the pushing rings, a plurality of adjustment blocks corresponding to the corresponding wedge blocks being fixedly mounted on each of the connecting plates, a sliding block being fixedly mounted on each of the wedge blocks, and a sliding groove matching the corresponding sliding block being provided on each of the adjustment blocks.

[0017] Compared with the prior art, the present invention has the following advantages: 1. When the argon arc welding wire feeding mechanism is feeding the welding wire, a storage box is set up to store the strip welding wire, and then the welding wire piled up in the storage box can be sorted out with the use of the clamping assembly so that there is only one welding wire at the bottom, and then the bottom welding wire is pushed out of the storage box by the pushing assembly, so that the strip welding wire can be fed stably and continuously, which solves the problem of difficulty in feeding the strip welding wire. At the same time, there is no need to load the material multiple times, and the number of welding wires stored at a time is large, which provides a long welding time and effectively improves the welding efficiency. At the same time, the position of the elastic steel plate is adjusted to adjust the distance between the elastic steel plate and the bottom of the storage box, so as to limit the welding wires of different sizes, which has a wider range of applications.

[0018] 2. When the argon arc welding wire feeding mechanism is feeding the welding wire, a feeding assembly is provided to transmit the welding wire pushed out from the storage box. A pressure regulating assembly is provided inside the feeding assembly. The pressure between the pressure block and the welding wire can be adjusted according to the thickness of the welding wire to ensure stable transmission of the welding wire. At the same time, a heating mechanism is also provided inside the feeding assembly to preheat the welding wire so that the welding wire reaches a certain temperature before entering the welding gun for welding, thereby accelerating the melting of the welding wire during welding and improving welding efficiency. In addition, a cooling fan is provided to dissipate the heat generated during heating, reduce the temperature on the connecting shell, and protect other structures on the connecting shell.

[0019] 3. When the argon arc welding wire feeding mechanism is feeding the welding wire, a straightening component is set to straighten the welding wire transmitted by the feeding component to ensure that the welding wire is in a straight state before entering the welding process. This can ensure that the distance between the welding wire and the welding gun is stable, thereby improving the welding quality. During the straightening process, the straightening force of the welding wire can also be adjusted according to the hardness and thickness of the welding wire, thereby realizing the straightening of various types of welding wires, with a wide range of applications.

[0020] In summary, the present invention can stably and continuously feed strip welding wires of different thicknesses, effectively improving welding efficiency. It can also preheat the welding wire before welding, reduce the temperature difference before welding, shorten the heating time of the welding wire, thereby improving the melting efficiency and welding efficiency of the welding wire. In addition, the welding wire can be straightened so that the welding wire remains straight before entering welding, ensuring the distance between the welding wire and the welding gun, thereby effectively improving the welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The specific embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings, wherein: Figure 1 This is a schematic structural diagram of a argon arc welding wire feeding mechanism for large reactor processing proposed by the present invention; Figure 2 for Figure 1 A schematic detailed view of the plan structure along one of the angles; Figure 3 for Figure 1 Detailed schematic diagram of the structure after being rotated to a certain angle; Figure 4 for Figure 1 Detailed schematic diagram of the structure after removing the welding gun; Figure 5 for Figure 4 A schematic diagram of the enlarged structure of the storage box and the motor; Figure 6 for Figure 5 A schematic detailed view of the plan structure along one of the angles; Figure 7 for Figure 6 A schematic detailed view of the three-dimensional structure of the middle storage box along the DD section; Figure 8 for Figure 7 A schematic detailed view of the plan structure along one of the angles; Fig. 9 for Figure 7 A detailed structural diagram after removing the storage box, motor and lead screw; Fig.10 for Figure 7 The enlarged structural schematic details of the motor and lead screw and other components; Fig.11 for Figure 4 A detailed diagram of the enlarged structure of the intermediate material transfer assembly; Fig.12 for Fig.11 Detailed schematic diagram of the structure after being rotated to a certain angle; Fig.13 for Fig.12 Detailed schematic diagram of the exploded structure; Fig.14 for Fig.13A detailed schematic diagram of the enlarged structure of the welding wire, heating coil and fixed shell; Fig.15 for Fig.14 Detailed schematic diagram of the exploded structure; Fig.16 for Figure 4 An enlarged schematic diagram of the structure of the center straightening assembly; Fig.17 for Fig.16 Detailed schematic diagram of the exploded structure; Fig.18 for Fig.17 A schematic detailed view of the planar structure of the center straight barrel, the threaded ring and the push ring along one of the angles; Fig.19 for Fig.18 Detailed schematic diagram of the three-dimensional structure along the AA section; Fig. 20 for Fig.19 A schematic detailed diagram of the enlarged structure of part B; Fig.21 for Fig. 20 Detailed diagram of the structure after the middle push ring and the adjusting block are rotated to a certain angle; Fig. 22 for Fig.21 A schematic detailed diagram of the planar structure of the middle wedge block and the adjusting block along one of the angles; Fig.23 for Fig. 22 Detailed schematic diagram of the three-dimensional structure along the CC section; Fig.24 for Fig.23 Detailed schematic diagram of the plan structure along one of the angles.

[0022] In the figure: 1 welding gun, 2 storage box, 3 material transfer assembly, 4 straightening assembly, 5 motor, 6 screw rod, 7 cone, 8 push plate, 9 nut, 10 telescopic rod, 11 connecting frame, 12 mounting frame, 13 connecting shell, 14 welding wire, 15 cooling fan, 16 gear 1, 17 heating ring, 18 heating module, 19 motor, 20 heating resistor, 21 fixed shell, 22 adjusting screw, 23 pressure block, 24 pressure spring, 25 limit sleeve, 26 driving wheel, 27 straightening cylinder, 28 adjusting cylinder, 29 fixing clamp, 30 threaded ring, 31 pushing ring, 32 threaded groove, 33 straightening wheel, 34 connecting plate, 35 wedge block, 36 adjusting block, 37 sliding block, 38 sliding groove, 39 bolt, 40 elastic steel plate, 41 rotating rod, 42 pull rod, 43 limit plate. DETAILED DESCRIPTION

[0023] 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.

[0024] Example 1: Reference Figure 1-Figure 10 A grouting device for karst caves in areas with developed karst tunnels includes a welding gun 1 and a welding wire 14; a feeding part installed at the bottom of the welding gun 1 and used to store the welding wire 14, the feeding part includes a connecting frame 11 fixedly installed at the bottom of the welding gun 1, a storage box 2 for storing the welding wire 14 is fixedly installed on the connecting frame 11, and a clamping assembly matching the welding wire 14 is installed on the storage box 2.

[0025] The connecting frame 11 and the welding gun 1 are connected by welding, and a passage hole matching the welding wire 14 is opened on the connecting frame 11; the end face of the storage box 2 is V-shaped, and the size of the upper opening of the storage box 2 is larger than the size of the bottom, and the strip welding wire 14 is placed horizontally in the storage box 2 (the storage box 2 has two discharge ports, and the material can only be discharged from one of the discharge ports each time, so that the welding wire 14 will not get stuck), as the welding wire 14 at the bottom is drawn out, the upper welding wire 14 will sink under the action of gravity, thereby realizing automatic and continuous feeding of the welding wire 14.

[0026] The clamping assembly includes an elastic steel plate 40 installed in the storage box 2 in a U shape and matched with the welding wire 14. The two ends of the elastic steel plate 40 are slidably connected to the storage box 2. A plurality of rotating rods 41 are rotatably installed on the elastic steel plate 40. A pull rod 42 is rotatably installed at one end of the plurality of rotating rods 41 away from the elastic steel plate 40. Two limit plates 43 are fixedly installed on the pull rod 42. The two limit plates 43 pass through and extend out of the top of the storage box 2. A size adjustment mechanism matched with the elastic steel plate 40 is installed on the storage box 2. The elastic steel plate 40 is an existing steel thin plate that can be deformed to a certain extent. It is a common existing material and will not be elaborated on here. Sliders are fixed at both ends of the elastic steel plate 40, and a slide groove matching the slide is provided on the top wall of the storage box 2. When the slide slides in the slide groove, the upper opening of the elastic steel plate 40 will expand or shrink, so the distance between the bottom of the elastic steel plate 40 and the bottom of the storage box 2 will change, so as to carry out welding wires 14 of different sizes.

[0027] The size adjustment mechanism includes a threaded ring fixedly mounted on the top of the storage box 2, on which a bolt 39 is threadedly mounted. The bolt 39 penetrates and extends into the storage box 2, and one end of the bolt 39 located inside the storage box 2 is rotatably connected to the pull rod 42.

[0028] By rotating the bolt 39, it will move up and down on the storage box 2 under the action of the threaded ring, thereby driving the bottom of the V-shaped elastic steel plate 40 to move up and down. Since the end of the elastic steel plate 40 is restricted, it can only move up and down along the top wall of the storage box 2, and the top wall of the storage box 2 is designed to be inclined. Therefore, as the bottom of the elastic steel plate 40 moves, the elastic steel plate 40 will be deformed, and welding wires 14 of different sizes will be pressed and fixed. The distance between the elastic steel plate 40 close to the bottom of the storage box 2 and the bottom of the storage box 2 is exactly equal to the diameter of the welding wire 14, so that the welding wire 14 is pressed and fixed.

[0029] The pushing assembly includes a motor 5 fixedly mounted on the outside of the storage box 2, a screw rod 6 is rotatably mounted on the side wall of the storage box 2 through a bearing, a nut 9 is threadedly rotatably mounted on the screw rod 6, a push plate 8 is fixedly mounted on the nut 9, an insert cone 7 matching the welding wire 14 is fixedly mounted on the push plate 8, a telescopic rod 10 is fixedly mounted on the side wall of the storage box 2, the telescopic end of the telescopic rod 10 is fixedly connected to the push plate 8, and a circular through hole is opened on the side of the storage box 2 for the insert cone 7 to pass through.

[0030] The rotation of the driving end of the motor 5 drives the screw rod 6 fixedly connected thereto to rotate. The rotation of the screw rod 6 drives the nut 9 to move, thereby driving the push plate 8 to move (the push plate 8 and the nut 9 will rotate with the rotation of the screw rod 6. In order to prevent the push plate 8 from rotating, the push plate 8 is limited by the telescopic rod 10). The movement of the push plate 8 drives the insertion cone 7 to move, so that the insertion cone 7 is inserted into the storage box 2, and the pressed and fixed welding wire 14 is pushed out from the other end of the storage box 2. Once the welding wire 14 is pushed out, the rear welding wire 14 will enter between the elastic steel plate 40 and the storage box 2 under the action of gravity, so as to carry out continuous and stable feeding.

[0031] Embodiment 2: This embodiment is different from the embodiment 1 in that: Figure 1-Figure 3 , Figure 11-Figure 15 The feeding part is installed at the bottom of the welding gun 1, and is used to receive the welding wire 14 in the storage box 2 and process and transmit the welding wire 14. The feeding part includes a connecting shell 13 installed at the bottom of the welding gun 1 through a clamping assembly; a handle is fixedly installed at the end of the welding gun 1 for the operator to grasp, and an anti-slip groove is provided on the handle.

[0032] The clamping assembly includes a mounting frame 12 fixedly mounted on the bottom of the welding gun 1, a clamping block matching the mounting frame 12 is fixedly mounted on the connecting shell 13, the mounting frame 12 and the clamping block are fixed by a threaded rod, the connecting shell 13 is horizontally inserted into the mounting frame 12, a plurality of spiral holes are opened on the mounting frame 12, the threaded rod is inserted into the spiral hole, and rotated so that the threaded rod is against the connecting shell 13, so as to lock the connecting shell 13.

[0033] A material transmission component 3 matched with the welding wire 14 is installed on the connecting shell 13, and the material transmission component 3 includes a fixed shell 21 fixedly installed on the connecting shell 13, a motor 19 fixedly installed on the fixed shell 21, a gear 16 rotatably installed on the fixed shell 21, a driving wheel 26 matched with the welding wire 14 is fixedly installed on the gear 16, a pressure block 23 is rotatably installed on the fixed shell 21, a driven wheel is rotatably installed on the pressure block 23, a gear 2 meshing with the gear 16 is fixedly installed on the driven wheel, and a limiting sleeve 25 matched with the welding wire 14 is fixedly installed on the fixed shell 21. The function of the limiting sleeve 25 is to limit the welding wire 14 to ensure that the welding wire 14 extends straight from the material transmission component 3.

[0034] A pressure regulating mechanism is installed between the pressure block 23 and the fixed shell 21. The rotation of the driving end of the motor 19 drives the gear 16 fixedly connected thereto to rotate, thereby driving the driving wheel 26 fixedly connected to the gear 16 to rotate. Due to the action of the pressure block 23, the driven wheel and the driving wheel 26 on the pressure block 23 will clamp the welding wire 14. As the driving wheel 26 rotates, the welding wire 14 clamped between the driving wheel 26 and the driven wheel will be driven to move through friction. The transmission effect of single wheel rotation is poor, so the rotation of gear 16 will drive gear 2 to rotate, and the rotation of gear 2 will drive the driven wheel fixedly connected thereto to rotate. The rotation directions of the driven wheel and the driving wheel 26 are opposite. At this time, two wheels are used to rotate and drive at the same time, which has greater friction and better driving effect.

[0035] The pressure regulating mechanism includes an adjusting screw 22 rotatably mounted on a fixed shell 21 , a threaded sleeve is threadedly rotatably mounted on the adjusting screw 22 , the threaded sleeve is slidably connected to the fixed shell 21 , a pressure spring 24 is fixedly mounted on the threaded sleeve , and the pressure spring 24 is fixedly connected to a pressure block 23 .

[0036] By rotating the adjusting screw 22, the rotating screw 22 will rotate at the original position on the fixed shell 21, and the threaded sleeve and the fixed shell 21 are slidably connected. Therefore, the rotation of the adjusting screw 22 will drive the threaded sleeve to move, and the movement of the threaded sleeve will change the distance between the threaded sleeve and the pressure block 23, thereby changing the length of the pressure spring 24, thereby changing the elastic force of the pressure spring 24. The greater the elastic force, the greater the clamping force between the driven wheel and the driving wheel 26 on the pressure block 23. Not only can the clamping force be changed, but the position of the pressure block 23 can also be adjusted by adjusting the threaded sleeve, while keeping the elastic force of the pressure spring 24 unchanged. In this way, welding wires 14 of different thicknesses can be clamped with the same force, which has a wider range of applications.

[0037] A heating mechanism matched with the welding wire 14 is installed on the connecting shell 13, and the heating mechanism includes a heating module 18 fixedly installed on the connecting shell 13, a heating coil 17 is fixedly installed inside the connecting shell 13, the heating coil 17 is sleeved on the welding wire 14, the heating module 18 and the heating coil 17 are heated by a heating resistor 20, and a cooling fan 15 is fixedly installed outside the connecting shell 13.

[0038] After the welding wire 14 passes through the limiting sleeve 25, it will enter the heating coil 17. At this time, the heating coil 17 is heated by the heating resistor 20 on the heating module 18, so as to preheat the welding wire 14 and reduce the temperature difference between the welding wire 14 before and during welding, thereby accelerating the melting speed of the welding wire 14 and improving the welding efficiency; since the heating coil 17 is located inside the fixed shell 21 and contacts with the fixed shell 21, the heat on the heating coil 17 will be conducted to the fixed shell 21. At this time, the heat on the fixed shell 21 is dissipated by the cooling fan 15, which can ensure that other components on the fixed shell 21 are in a relatively low temperature environment, thereby improving the operating efficiency of the components.

[0039] Embodiment 3: This embodiment is different from the technical solution of Embodiment 2 in that: Figure 1-Figure 3 , Figure 16-Figure 24 The straightening part is installed at the end of the welding gun 1 and is used to straighten the welding wire 14 sent by the feeding part to keep the distance between the welding wire 14 and the welding gun 1 stable. The straightening part includes a fixing clamp 29 fixedly installed at the end of the welding gun 1, and a straightening component 4 matching with the welding wire 14 is installed on the fixing clamp 29.

[0040] Since part of the welding wire 14 will produce a certain degree of deformation (the welding wire 14 is relatively thin, generally with a diameter not exceeding five millimeters. When loading into the storage box 2, the welding wire 14 needs to be held, and the force exceeding a certain range will cause the welding wire 14 to deform), the welding wire 14 needs to be straightened to ensure the distance between the welding wire 14 and the welding gun 1, and to ensure the stability of welding (the position offset of the welding wire 14 may cause uneven welds, thereby affecting the strength of the welded joint, and may also cause uneven weld width and uneven surface, thereby affecting the aesthetics of the welding; the position offset of the welding wire 14 may cause changes in the heat-affected zone, which will affect the properties of the material, and uneven welding heat distribution may cause changes in the crystal structure and hardness of the heat-affected zone, thereby affecting the overall performance of the workpiece; the offset of the welding wire 14 may make it easier to produce welding defects such as pores, slag inclusions, cracks, etc.).

[0041] The straightening assembly 4 includes a straightening cylinder 27 fixedly mounted on a fixing clamp 29, a plurality of connecting plates 34 are slidably mounted inside the straightening cylinder 27, a plurality of straightening wheels 33 cooperating with the welding wire 14 are rotatably mounted on each connecting plate 34, and a zoom mechanism cooperating with the plurality of connecting plates 34 is installed on the straightening cylinder 27.

[0042] After the welding wire 14 extends out from the heating coil 17, it enters the straightening cylinder 27 on the straightening assembly 4. The plurality of straightening wheels 33 inside the straightening cylinder 27 clamp and straighten the welding wire 14. Since the welding wire 14 has been preheated, its shape is extremely easy to change, and the straightening effect is better. The straightening wheel 33 is a concave wheel with an arc-shaped depression, which can increase the contact area with the welding wire 14. According to the calculation of pressure, the larger the contact area, the smaller the pressure when the same force is applied. Therefore, this can effectively reduce the pressure on the welding wire 14, thereby reducing the probability of the welding wire 14 being flattened (even if it is not flattened, it will be deformed).

[0043] The zoom mechanism includes a plurality of threaded rings 30 threadably mounted on the straightening cylinder 27 through a threaded groove 32, an adjusting cylinder 28 being fixedly mounted on the plurality of threaded rings 30, a pushing ring 31 being rotatably mounted on each threaded ring 30, each pushing ring 31 being slidably connected to the straightening cylinder 27, a plurality of wedge blocks 35 being fixedly mounted on each pushing ring 31, a plurality of adjusting blocks 36 corresponding to the corresponding wedge blocks 35 being fixedly mounted on each connecting plate 34, a sliding block 37 being fixedly mounted on each wedge block 35, and a sliding groove 38 matching the corresponding sliding block 37 being provided on each adjusting block 36.

[0044] Since the diameter of the push ring 31 is larger than the diameter of the threaded ring 30, if the inside of the adjusting cylinder 28 is in a straight cylinder state, the adjusting cylinder 28 will directly contact the push ring 31, and will not be fixed to the threaded ring 30. Therefore, an annular connecting ring is provided inside the adjusting cylinder 28, and the annular connecting ring is fixed to the threaded ring 30, and the total diameter of the connecting ring and the threaded ring 30 is larger than the diameter of the push ring 31, so that it can be ensured that rotating the adjusting cylinder 28 will drive the threaded ring 30 to rotate; Rotating the adjusting cylinder 28 will drive the threaded ring 30 to rotate. Under the action of the threaded groove 32, the threaded ring 30 will move on the straightening cylinder 27, thereby driving the pushing ring 31 to move. The movement of the pushing ring 31 will drive the wedge block 35 fixed thereto to move, thereby driving the sliding block 37 on the wedge block 35 to move in the sliding groove 38 on the adjusting block 36. Since the sliding groove 38 is designed to be inclined, the adjusting block 36 will be driven to move in the vertical direction as the sliding block 37 moves. The movement of the adjusting block 36 drives the connecting plate 34 to move, thereby driving the straightening wheel 33 to move, so that the pressing force between the straightening wheel 33 and the welding wire 14 can be adjusted, and welding wires 14 of different sizes can also be straightened (due to the different hardnesses of different types of welding wires 14, the straightening force required for straightening is also different. In addition, the straightening force required for the same type of welding wire 14 before and after preheating is also different. Therefore, this design of adjustable pressure straightening can be applied to welding wire 14 straightening in more cases).

[0045] The specific operation steps of this device are as follows: First, adjust the bottom position of the elastic steel plate 40 to the lowest position so that the bottom of the elastic steel plate 40 is in contact with the bottom of the storage box 2, and then place the welding wire 14 horizontally into the storage box 2. At this time, the welding wire 14 will not reach the bottom of the storage box 2. Then adjust the distance between the bottom of the elastic steel plate 40 and the bottom of the storage box 2 until one of the welding wires 14 falls between the elastic steel plate 40 and the storage box 2. At this time, the distance between the elastic steel plate 40 and the bottom of the storage box 2 is exactly the diameter of the welding wire 14, which ensures that only one welding wire 14 can pass through.

[0046] The welding wire 14 at the bottom is then pushed from the storage box 2 into the material transfer assembly 3 by the pushing assembly, and then the welding wire 14 is preheated by the heating mechanism on the material transfer assembly 3. After the preheating is completed, the welding wire 14 enters the straightening assembly 4 under the action of the material transfer assembly 3, and is straightened in the straightening assembly 4 to ensure that the distance between the welding wire 14 and the welding gun 1 is stable.

[0047] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A argon arc welding wire feeding mechanism for processing a large reactor, comprising a welding gun (1), characterized in that: The welding machine also includes a welding wire (14); a feeding section, mounted at the bottom of the welding gun (1) and used to store the welding wire (14); the feeding section includes a connecting frame (11) fixedly mounted at the bottom of the welding gun (1); a storage box (2) for storing the welding wire (14) is fixedly mounted on the connecting frame (11); a pressing assembly and a pushing assembly matching the welding wire (14) are mounted on the storage box (2); a feeding section, mounted at the bottom of the welding gun (1) and used to receive the welding wire (14) in the storage box (2) and process and convey the welding wire (14); The feeding portion comprises a connecting shell (13) mounted on the bottom of the welding gun (1) via a snap-fit ​​assembly, and a feeding assembly (3) matched with the welding wire (14) is mounted on the connecting shell (13); a straightening portion is mounted on the end of the welding gun (1) and is used to straighten the welding wire (14) sent by the feeding portion to maintain a stable spacing between the welding wire (14) and the welding gun (1), and the straightening portion comprises a fixing clamp (29) fixedly mounted on the end of the welding gun (1), and a straightening assembly (4) matched with the welding wire (14) is mounted on the fixing clamp (29).

2. The argon arc welding wire feeding mechanism for large reactor processing according to claim 1, characterized in that: The clamping assembly includes an elastic steel plate (40) installed in a U-shape inside the storage box (2) and matched with the welding wire (14), the two ends of the elastic steel plate (40) are slidably connected to the storage box (2), a plurality of rotating rods (41) are rotatably installed on the elastic steel plate (40), and a pull rod (42) is rotatably installed at one end of the plurality of rotating rods (41) away from the elastic steel plate (40), and two limit plates (43) are fixedly installed on the pull rod (42), and the two limit plates (43) pass through and extend out of the top of the storage box (2), and a size adjustment mechanism matched with the elastic steel plate (40) is installed on the storage box (2).

3. The argon arc welding wire feeding mechanism for large reactor processing according to claim 2, characterized in that: The size adjustment mechanism comprises a threaded ring fixedly mounted on the top of the storage box (2), a bolt (39) being threadedly mounted on the threaded ring, the bolt (39) passing through and extending into the interior of the storage box (2), and one end of the bolt (39) located inside the storage box (2) is rotatably connected to the pull rod (42).

4. The argon arc welding wire feeding mechanism for large reactor processing according to claim 1, characterized in that: The push assembly comprises a motor (5) fixedly mounted on the outside of a storage box (2); a screw rod (6) is rotatably mounted on a side wall of the storage box (2) via a bearing; a nut (9) is threadedly rotatably mounted on the screw rod (6); a push plate (8) is fixedly mounted on the nut (9); a plug cone (7) matching the welding wire (14) is fixedly mounted on the push plate (8); a telescopic rod (10) is fixedly mounted on the side wall of the storage box (2); a telescopic end of the telescopic rod (10) is fixedly connected to the push plate (8); and a circular through hole is provided on the side of the storage box (2) for the plug cone (7) to pass through.

5. The argon arc welding wire feeding mechanism for large reactor processing according to claim 1, characterized in that: The clamping assembly comprises a mounting frame (12) fixedly mounted on the bottom of the welding gun (1), a clamping block matching the mounting frame (12) is fixedly mounted on the connecting shell (13), and the mounting frame (12) and the clamping block are fixed by a threaded rod.

6. The argon arc welding wire feeding mechanism for large reactor processing according to claim 1, characterized in that: The material transmission assembly (3) comprises a fixed shell (21) fixedly mounted on the connecting shell (13), a motor (19) fixedly mounted on the fixed shell (21), a gear 1 (16) rotatably mounted on the fixed shell (21), a driving wheel (26) matched with the welding wire (14) fixedly mounted on the gear 1 (16), a pressing block (23) rotatably mounted on the fixed shell (21), a driven wheel rotatably mounted on the pressing block (23), a gear 2 meshing with the gear 1 (16) fixedly mounted on the driven wheel, a limiting sleeve (25) matched with the welding wire (14) fixedly mounted on the fixed shell (21), a pressure regulating mechanism mounted between the pressing block (23) and the fixed shell (21), and a heating mechanism matched with the welding wire (14) mounted on the connecting shell (13).

7. The argon arc welding wire feeding mechanism for large reactor processing according to claim 6, characterized in that: The pressure regulating mechanism comprises an adjusting screw (22) rotatably mounted on a fixed shell (21); a threaded sleeve is rotatably mounted on the adjusting screw (22); the threaded sleeve is slidably connected to the fixed shell (21); a pressure spring (24) is fixedly mounted on the threaded sleeve; and the pressure spring (24) is fixedly connected to a pressure block (23).

8. The argon arc welding wire feeding mechanism for large reactor processing according to claim 6, characterized in that: The heating mechanism comprises a heating module (18) fixedly mounted on a connecting shell (13); a heating coil (17) is fixedly mounted inside the connecting shell (13); the heating coil (17) is sleeved on the welding wire (14); the heating module (18) and the heating coil (17) are heated by a heating resistor (20); and a cooling fan (15) is fixedly mounted outside the connecting shell (13).

9. The argon arc welding wire feeding mechanism for large reactor processing according to claim 1, characterized in that: The straightening assembly (4) comprises a straightening cylinder (27) fixedly mounted on a fixing clamp (29), a plurality of connecting plates (34) being slidably mounted inside the straightening cylinder (27), a plurality of straightening wheels (33) cooperating with the welding wire (14) being rotatably mounted on each of the connecting plates (34), and a zoom mechanism cooperating with the plurality of connecting plates (34) being mounted on the straightening cylinder (27).

10. The argon arc welding wire feeding mechanism for large reactor processing according to claim 9, characterized in that: The zoom mechanism comprises a plurality of threaded rings (30) threadably mounted on the straightening cylinder (27) via threaded grooves (32); an adjusting cylinder (28) is commonly fixedly mounted on the plurality of threaded rings (30); a pushing ring (31) is rotatably mounted on each of the threaded rings (30); each of the pushing rings (31) is slidably connected to the straightening cylinder (27); a plurality of wedge blocks (35) are fixedly mounted on each of the pushing rings (31); a plurality of adjusting blocks (36) corresponding to the corresponding wedge blocks (35) are fixedly mounted on each of the connecting plates (34); a sliding block (37) is fixedly mounted on each of the wedge blocks (35); and each of the adjusting blocks (36) is provided with a sliding groove (38) matching the corresponding sliding block (37).

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