An electrode coating press forming device

Abstract

The present application relates to the technical field of welding rod processing equipment, and particularly discloses a welding rod coating compression coating forming device, which comprises a compression coating pipe and a welding core penetrating through the center of the compression coating pipe, and the inner cavity of the compression coating pipe is sequentially provided with a feeding cavity, a material uniformizing cavity and a compression coating cavity; the compression coating pipe is provided with a feeding mechanism communicating with the feeding cavity, a material uniformizing mechanism arranged in the material uniformizing cavity, an arch breaking mechanism arranged in the compression coating cavity, and a driving mechanism driving the material uniformizing mechanism and the arch breaking mechanism to act; the arch breaking mechanism comprises a plurality of arch breaking rods arranged in a circumferential direction around the welding core, and the arch breaking rods are parallel to the welding core and arranged at intervals; the material flows through the feeding cavity and the material uniformizing cavity in sequence and then enters the compression coating cavity; the driving mechanism drives the material uniformizing mechanism to uniformly press the material in the material uniformizing cavity, and simultaneously, the driving mechanism drives the arch breaking rods to rotate around the welding core to eliminate the arching phenomenon of the material around the welding core; the welding rod coating compression coating forming device has the effect of improving the compression coating forming quality of the coating.

Description

Technical Field

[0001] This invention relates to the technical field of welding electrode processing equipment, and specifically to a welding electrode coating pressing and forming device. Background Technology

[0002] The electrode coating pressing and forming device is the core equipment of the electrode production line. It relies on hydraulic or screw mechanisms to apply pressure to the prepared plastic coating material, so that the coating material wraps around the forward-carrying welding core through the forming mold, realizing the integral extrusion forming of the coating. The mechanical pressing and forming can stably control the coating thickness, concentricity and density. It is mainly used for continuous and automated preparation of electrode blanks, ensuring that the coating is firmly bonded and the surface is regular, ensuring that the arc is stable and the gas and slag formation effect meets the standards during subsequent welding, while greatly improving the electrode production efficiency and reducing raw material loss.

[0003] Chinese patent document CN221231827U discloses a flux coating press for welding rod processing, including a frame, a housing on the left side of the frame, and a cavity inside the housing; a pressure plate is slidably mounted on the inner wall of the cavity, a connecting part is fixedly set on the left side of the pressure plate, and hydraulic presses are arranged on both sides of the end of the connecting part away from the pressure plate, and the hydraulic presses are fixedly installed on the housing; a wire tube is fixedly connected to the upper right of the frame, and the left end of the wire tube passes through the connecting part and the middle of the pressure plate in sequence; a support frame is hinged to the outer wall of the left side of the housing, and a cover is movably engaged inside the support frame, and the cover can rotate within the support frame, with the outer wall of the right side of the cover engaging and positioning with the inner wall of the left side of the housing; a discharge port is opened in the center of the cover, and an annular groove is set on the right side of the discharge port; a sleeve is threadedly connected to the left side of the cover, and the sleeve is embedded inside the discharge port, with the outer wall of the sleeve tightly fitting the inner wall of the discharge port; the hydraulic press drives the pressure plate to squeeze the flux coating mixture in the cavity, and the welding rod wire passes through the center, and the flux coating is coated on the surface of the wire under pressure to complete the pressure forming of the welding rod flux coating.

[0004] However, this solution also has the following problems: During the process of the welding core passing through the flux coating area, the flux continuously covers and presses against the surface of the welding core, and the flux around the welding core is prone to instantaneous arching; under continuous high pressure, the arched structure cannot be stably maintained and will repeatedly form and be broken open. The flux coating thickness is too thin during the arching stage, and after the arch collapses, the surrounding flux suddenly accumulates and thickens, which causes periodic fluctuations in the outer diameter of the welding electrode, resulting in uneven flux coating thickness around the welding core, eccentric flux coating, local missing flux exposing the core, and pitting defects on the surface of the welding electrode, which seriously reduces the quality of the flux coating forming. Summary of the Invention

[0005] This invention provides a welding electrode coating pressing and forming device, which aims to solve the problem in related technologies where repeated arching of the flux during the welding electrode pressing and forming process affects the quality of the flux coating.

[0006] The electrode coating pressure coating forming device of the present invention includes a pressure coating tube and a welding core passing through the center of the pressure coating tube. The inner cavity of the pressure coating tube is provided with a feeding chamber, a uniform material chamber and a pressure coating chamber in sequence along the welding core conveying direction. The pressure coating tube is provided with a feeding mechanism connected to the feeding chamber, a uniform material mechanism provided in the uniform material chamber, an arch-breaking mechanism provided in the pressure coating chamber, and a driving mechanism for driving the uniform material mechanism and the arch-breaking mechanism. The arch-breaking mechanism includes multiple arch-breaking rods arranged circumferentially around the welding core. The arch-breaking rods are parallel to the welding core and spaced apart from each other. The material is conveyed to the feeding chamber by the feeding mechanism and flows through the feeding chamber and the uniform material chamber in sequence before entering the pressure coating chamber. The driving mechanism drives the uniform material mechanism to perform uniform pressure treatment on the material in the uniform material chamber, so that the material is uniformly conveyed to the pressure coating chamber. At the same time, the driving mechanism drives the arch-breaking rods to rotate around the welding core to eliminate the arching phenomenon of the material around the welding core.

[0007] Its effect lies in the fact that by controlling the conveying path inside the pressure coating tube in stages, the overall pressure state of the electrode coating material can be adjusted before entering the final forming area. Specifically, the feeding mechanism first pushes the coating material in the feeding hopper along the axial direction of the feeding tube, allowing the material to enter the feeding chamber at a stable flow rate. After the material enters the uniform material chamber, the uniform material mechanism operates synchronously under the power provided by the drive mechanism. The uniform material mechanism changes the original internal state of the material, ensuring that the material entering the pressure coating chamber maintains a relatively balanced flow state. When the material coats the welding core, the arch-breaking mechanism continuously moves around the welding core axis under the action of the drive mechanism. By breaking the stable overlapping structure that easily forms around the welding core, the material can continuously fill the area around the welding core, avoiding interruption of the coating supply due to local bridging. This ensures that the coating material maintains a continuous, stable, and circumferentially uniform supply state throughout the entire pressure coating process, thereby forming a uniform and complete coating layer on the outside of the welding core, improving the coating pressure coating forming quality.

[0008] Preferably, the driving mechanism includes a driving member and a driving rod. The driving rod is rotatably assembled inside the pressure coating tube. One end of the driving rod is connected to the arch-breaking rod, and the other end extends to the outside of the pressure coating tube and is connected to the output end of the driving member.

[0009] Its effect lies in the fact that the drive mechanism provides synchronous power output to the material leveling mechanism and the arch-breaking mechanism, enabling the two functional areas to operate in a coordinated manner based on the same power source. During operation, the drive component generates rotational power and transmits it to the drive rod. As the drive rod rotates inside the pressure coating tube, it drives the arch-breaking rod connected to it to rotate circumferentially, allowing the arch-breaking rod to continuously act on the outer area of ​​the welding core. On the other hand, the drive rod synchronously drives the material leveling mechanism installed on it to operate, ensuring that the material entering the pressure coating chamber is evenly distributed.

[0010] Preferably, the material leveling mechanism includes a material leveling impeller and a material leveling plate. The material leveling impeller is fixedly sleeved on the outside of the drive rod. The material leveling plate is located between the material leveling chamber and the pressure coating chamber. The material leveling plate is provided with a through hole connecting the material leveling chamber and the pressure coating chamber. The end of the drive rod passes through the material leveling plate and is connected to the arch-breaking rod.

[0011] Its effect lies in the pretreatment of the flux coating material before it enters the coating zone through the coordinated action of the flux-equalizing impeller and the flux-equalizing plate, transforming the material into a uniformly distributed state within the flux-equalizing chamber. During operation, the rotating drive rod drives the flux-equalizing impeller to rotate synchronously. The impeller continuously disturbs the flux coating material inside the flux-equalizing chamber, dispersing the material in densely populated areas while replenishing relatively sparse areas, thus reducing density differences between different locations within the material. The material, adjusted by the flux-equalizing impeller, continues to move towards the flux-equalizing plate and enters the coating chamber through the through-holes on the plate. This process is equivalent to adding a pressure buffer and flow correction before coating, ensuring a more consistent material supply in all directions when the core electrode is subsequently coated. Therefore, as the core electrode continuously passes through the coating zone, it reduces the phenomenon of flux coating being too thin or too thick due to insufficient local supply or pressure changes, resulting in better uniformity of the electrode flux coating along both the length and circumference directions, improving the consistency of the finished electrode.

[0012] Preferably, the center lines of the uniform material chamber and the pressure coating chamber are on the same straight line, the uniform material plate is perpendicular to the center line of the uniform material chamber, and multiple through holes are arranged circumferentially around the center line of the uniform material chamber.

[0013] The effect lies in the coaxial design of the uniform material chamber and the pressure coating chamber, and the circumferential arrangement of the material output channel, which allows the flux coating material to form a more balanced flow environment around the welding core. During equipment operation, because the center lines of the two chambers are aligned, the material entering the pressure coating area from the uniform material area is not affected by the offset path, thus reducing the tendency for material to concentrate on one side. Simultaneously, multiple through-holes on the uniform material plate are distributed around the center position, allowing the adjusted material to enter the pressure coating chamber simultaneously from different directions. When the material flows from multiple directions converge, they act together on the outer area of ​​the welding core, making the material pressure around the welding core more uniform and avoiding the flow deviation phenomenon caused by differences in flow resistance in traditional unidirectional feeding methods. Furthermore, the evenly distributed through-holes can also disperse and adjust the material entry speed, making the pressure changes inside the pressure coating chamber smoother and reducing the adverse effects of instantaneous pressure impacts on the flux coating formation process. Through the above structural combination, the flux coating formation process around the welding core is more stable, reducing problems such as surface depressions and localized material shortages caused by uneven pressure, improving the appearance quality of the welding electrode and subsequent welding performance.

[0014] Preferably, the feeding mechanism includes a feeding hopper, a feeding pipe and a spiral conveyor plate, the feeding pipe is connected to the coating pipe, the feeding hopper is located on the feeding pipe, and the spiral conveyor plate is rotatably assembled inside the feeding pipe.

[0015] Preferably, the end of the spiral conveyor blade extends into the feed chamber.

[0016] Its effectiveness lies in establishing a continuous and controllable input process for the coating material through a screw conveyor, enabling the equipment to adapt to the needs of long-term continuous pressure coating production. During operation, the coating material enters the feed pipe from the feed hopper and gradually moves towards the pressure coating pipe under the axial thrust generated by the rotation of the screw conveyor. Because the screw conveyor can continuously occupy the internal space of the feed pipe and form a regular propulsion area, it can avoid the problem of fluctuating flow rates when the material falls freely under its own gravity. When the end of the screw conveyor extends into the feed chamber, the material can directly enter the subsequent processing area, reducing intermediate dwell time in the feeding process and lowering the risk of agglomeration caused by material retention. At the same time, a stable feeding speed can provide relatively consistent material input conditions for the subsequent leveling mechanism, so that the leveling and pressure coating processes will not be frequently adjusted due to fluctuations in the front-end feed.

[0017] Preferably, the drive rod has a through-hole along the axial direction, through which the welding core passes.

[0018] Preferably, a guide slope is provided at the end of the wire groove away from the arch-breaking rod.

[0019] Its effectiveness lies in the fact that, through the through-type wire-passing structure inside the drive rod, the welding core conveying path and the drive component's movement path are integrated, ensuring continuous and stable operation of the welding core while guaranteeing rotary transmission. Specifically, the welding core passes through the wire-passing groove inside the drive rod, allowing the drive rod to rotate around the periphery of the welding core without hindering its continuous axial movement. When the welding core enters the wire-passing groove, the guide slope at the end expands the entry area, providing a gradual guide to the end of the welding core, making it easier to position and insert, and reducing alignment difficulties during installation and debugging. During continuous operation, the inner wall of the wire-passing groove also restricts the position of the welding core, keeping it always in the center area of ​​the pressure coating tube, reducing lateral swaying during conveying. Once the welding core position is stable, the flux coating material can be more evenly distributed around the outer periphery of the welding core, avoiding the problem of increased flux coating thickness on one side and insufficient flux coating on the other side due to welding core misalignment. Therefore, this structure not only improves the operational stability of the welding core but also improves the concentricity during flux coating, resulting in a more uniform cross-sectional structure in the final welding electrode.

[0020] Preferably, the end of the pressure coating tube is provided with a forming mechanism, which includes a mold one and a mold two. Both mold one and mold two are provided with forming holes at their centers. The forming holes are concentrically arranged with the center line of the pressure coating tube. Mold one is installed on the pressure coating tube, and mold two is installed on mold one. Mold one is provided with a forming guide surface on the side near the pressure coating tube.

[0021] Its effect lies in the fact that, through the progressive constraint of mold one, mold two, and the forming guide surface, the already coated welding core can undergo further compaction and dimensional correction. During operation, the welding core with coated material first passes through the forming guide surface. Due to the progressive contraction characteristic of the guide surface, the coated material is subjected to gradually increasing radial constraint as it moves forward, compressing the originally loose material structure and uniformly adhering it to the welding core surface. Subsequently, the welding core continues to pass through the forming hole. Under the constraint of the inner wall of the forming hole, the outer contour of the coated material is further refined, ensuring that the outer diameter of the welding rod remains stable and consistent. At the same time, mold two adopts a detachable installation method. When facing the processing requirements of welding cores of different specifications, only the mold with the corresponding size forming hole needs to be replaced to adjust the forming size, without changing the overall equipment structure.

[0022] Preferably, an auxiliary ring is provided at the end of the arch-breaking rod away from the drive rod. The auxiliary ring is connected to multiple arch-breaking rods and is sleeved on the outside of the welding core. An installation groove is provided on the forming guide surface of the mold, and the auxiliary ring is rotatably assembled in the installation groove.

[0023] Its effect is that by setting the mounting groove to cooperate with the auxiliary ring, the stability of the auxiliary ring when rotating is improved, thereby improving the stability of the arch-breaking rod when rotating.

[0024] Beneficial effects: By setting up a material-uniforming impeller, through holes, and an arch-breaking rod rotating around the welding core, this invention can uniformly distribute the material and disturb the material around the welding core, preventing the material from arching and bridging, so that the material in the pressure coating cavity and around the welding core is evenly distributed, achieving continuous and uniform coating of the welding core and improving the quality of the coating molding. Attached Figure Description

[0025] Figure 1 This is a front view of the present invention.

[0026] Figure 2 This is a schematic diagram of the overall structure of the present invention.

[0027] Figure 3 This is a schematic diagram of the pressure coating tube in this invention.

[0028] Figure 4 This is a schematic diagram of the internal structure of the pressure coating tube in this invention.

[0029] Figure 5 This is a schematic diagram of the internal structure of the drive rod of the present invention.

[0030] Figure 6 yes Figure 5 A magnified view of a portion of point A in the middle.

[0031] Figure 7 This is a schematic diagram of the material leveling plate in this invention.

[0032] Figure 8 This is a partial exploded view of the drive rod and the uniform impeller in this invention.

[0033] Reference numerals: 1. Welding core; 2. Coating tube; 21. Feeding chamber; 22. Blending chamber; 23. Coating chamber; 3. Feeding mechanism; 31. Feeding hopper; 32. Feeding tube; 33. Spiral conveyor; 4. Blending mechanism; 41. Blending impeller; 42. Blending plate; 421. Through hole; 5. Arch breaking mechanism; 51. Arch breaking rod; 52. Auxiliary ring; 6. Drive mechanism; 61. Drive component; 62. Drive rod; 7. Threading groove; 71. Guide slope; 8. Forming mechanism; 81. Mold one; 811. Forming guide surface; 812. Mounting groove; 82. Mold two; 9. Forming hole. Detailed Implementation

[0034] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0035] like Figures 1 to 8 As shown, the electrode coating forming device of the present invention includes a coating tube 2, a feeding mechanism 3, a leveling mechanism 4, an arch-breaking mechanism 5, a driving mechanism 6, and a forming mechanism 8. The discharge end of the feeding mechanism 3 is connected to the internal cavity of the coating tube 2, and can stably and continuously feed the electrode coating material into the coating tube 2. The driving mechanism 6 is driven by the leveling mechanism 4 and the arch-breaking mechanism 5 respectively, providing the operating power for the two mechanisms. The leveling mechanism 4 is installed in the internal cavity of the coating tube 2, and can uniformly distribute the coating material entering the coating tube 2, so that the material is evenly distributed around the welding core 1 in the circumferential direction. The arch-breaking mechanism 5 is used to continuously disturb the material flowing around the welding core 1, and break the bridging and arching cavities that are easily formed around the outer wall of the welding core 1 during the extrusion flow of the material. The forming mechanism 8 is assembled at the material output end of the coating tube 2, and is used to extrude and shape the material covering the outside of the welding core 1.

[0036] During the continuous pressure coating process of welding electrode coating, the welding core 1 is continuously conveyed through the central channel of the pressure coating tube 2 along the axial direction. Simultaneously, the feeding mechanism 3 continuously delivers the prepared material into the inner cavity of the pressure coating tube 2. The drive mechanism 6 synchronously drives the material leveling mechanism 4 and the arch-breaking mechanism 5 to operate in coordination. The material leveling mechanism 4 circumferentially leveles the material entering the cavity, ensuring that the material is evenly distributed around the outer periphery of the welding core 1. As the welding core 1 moves forward, the material adheres to the surface of the welding core 1 substrate under pressure. The arch-breaking mechanism 5 continuously and dynamically disturbs the material around the core 1, continuously breaking the arch gaps formed by the overlapping of material particles, effectively avoiding problems such as local material shortage and uneven material distribution caused by material bridging and arching; the core 1 with material attached is continuously conveyed to the forming mechanism 8 at the end of the pressure coating tube 2, and is squeezed and shaped by the forming mechanism 8, so that the coating is dense and uniformly thick and fixed on the outer surface of the core 1, improving the defects such as uneven coating thickness and local missing layers from the source, and steadily improving the overall pressure coating forming quality of the electrode coating.

[0037] Reference Figure 3 , Figure 4 , Figure 5 The inner cavity of the pressure coating tube 2 is divided into three independent functional areas along the conveying direction of the welding core 1: the feeding chamber 21, the uniform material chamber 22, and the pressure coating chamber 23. The uniform material chamber 22 is located between the feeding chamber 21 and the pressure coating chamber 23. The discharge channel of the feeding mechanism 3 is connected to the feeding chamber 21 inside the pressure coating tube 2. The uniform material mechanism 4 is correspondingly assembled in the inner space of the uniform material chamber 22, and the arch breaking mechanism 5 is installed in the pressure coating chamber 23.

[0038] When the equipment is working normally, the coating material is continuously conveyed into the feeding chamber 21 through the feeding mechanism 3. Under pressure, the material flows forward along the conveying direction of the welding core 1, passing through the feeding chamber 21 and the uniform material chamber 22 in sequence, and finally entering the end pressure coating chamber 23. The drive mechanism 6 continuously provides power to the uniform material mechanism 4, driving the uniform material mechanism 4 to continuously operate, and to stir, divide, and regulate the pressure of the coating material continuously flowing inside the uniform material chamber 22. This balances the internal pressure of the material, stabilizes the material conveying flow rate, and eliminates the problems of uneven material flow rate and local accumulation, so that the material is conveyed to the pressure coating chamber 23 in a stable and uniformly distributed state. At the same time, the arch-breaking mechanism 5 arranged in the pressure coating chamber 23 continuously disturbs and sorts the coating material around the welding core 1, effectively preventing the powder material from bridging and arching around the welding core 1, and eliminating the defect of gaps around the welding core 1.

[0039] By designing the inner cavity of the pressure coating tube 2 into functional zones, the material conveying, pressure stabilization and uniform coating, and coating forming processes are implemented in segments. This ensures that the coating material only comes into contact with the moving welding core 1 and completes the coating process in the pressure coating cavity 23 area. Before the material reaches the pressure coating cavity 23 for coating, it undergoes sufficient homogenization and pressure stabilization treatment in the uniform coating cavity 22 through the uniform coating mechanism 4. This ensures that the material can be evenly distributed around the outer wall of the welding core 1 after entering the pressure coating cavity 23, effectively preventing material deviation and aggregation, uneven coating thickness, and coating breaks. This ensures that the coating material continuously and evenly adheres to and coats the outer surface of the welding core 1, effectively improving the consistency of the coating forming of the welding core 1 and significantly improving the overall pressure coating forming quality of the welding core 1.

[0040] Reference Figure 4 , Figure 5 , Figure 6 , Figure 8 The arch-breaking mechanism 5 includes arch-breaking rods 51 and auxiliary rings 52. Multiple arch-breaking rods 51 are evenly arranged circumferentially along the outer periphery of the welding core 1. Each arch-breaking rod 51 is arranged parallel to the welding core 1, and adjacent arch-breaking rods 51 are spaced apart. The drive mechanism 6 is connected to each arch-breaking rod 51 and can drive all arch-breaking rods 51 to rotate synchronously around the axis of the welding core 1. The auxiliary ring 52 is assembled at the end of the arch-breaking rod 51 away from the drive mechanism 6. The auxiliary ring 52 is sleeved on the outside of the welding core 1, and its inner side is spaced apart from the welding core 1. The auxiliary ring 52 is also connected to the ends of all the arch-breaking rods 51, so that multiple arch-breaking rods 51 form an integrated frame structure through the auxiliary ring 52, which improves the structural stability of the arch-breaking rods 51 during operation.

[0041] During the pressure coating process of the welding core 1, the drive mechanism 6 outputs power and drives multiple anti-bridging rods 51 to rotate around the welding core 1. During rotation, the anti-bridging rods 51 continuously agitate the coating material around the outer periphery of the welding core 1, constantly disrupting the conditions for material accumulation to form a stable material arch. This effectively prevents bridging and arching around the welding core 1, ensuring continuous and sufficient contact between the material and the outer surface of the welding core 1. Simultaneously, the continuous circumferential disturbance of the anti-bridging rods 51 reshapes the material accumulation state around the welding core 1, promoting a more balanced distribution of material along the circumference of the welding core 1. This makes the compressive pressure on the outer wall of the welding core 1 more uniform, thereby ensuring that the coating material is evenly and continuously pressure coated onto the surface of the welding core 1, improving the uniformity of the coating.

[0042] In addition, an auxiliary ring 52 is configured at the end of the arch-breaking rod 51 away from the drive mechanism 6, and the ends of all the arch-breaking rods 51 are connected to the auxiliary ring 52. The auxiliary ring 52 can provide radial support and positioning constraints for multiple arch-breaking rods 51, stably maintaining equal radial spacing between each arch-breaking rod 51 and the axis of the welding core 1, preventing the arch-breaking rods 51 from deflecting and deforming under the action of material resistance. Furthermore, the auxiliary ring 52 can make multiple arch-breaking rods 51 form an integrated rotating frame, reducing the shaking and bending deformation generated when the arch-breaking rods 51 rotate, significantly improving the coaxiality and working stability of the entire arch-breaking structure during rotation, and ensuring the long-term stability of continuous arch breaking and material uniformity.

[0043] Reference Figure 4 , Figure 5 , Figure 6 , Figure 8 The drive mechanism 6 includes a drive component 61 and a drive rod 62. The drive rod 62 is rotatably installed inside the pressure coating tube 2. The drive rod 62 is arranged axially. One end of the drive rod 62 is fixedly connected to the arch-breaking rod 51. Specifically, the fixed connection between the drive rod 62 and the arch-breaking rod 51 can be achieved by welding. The other end of the drive rod 62, away from the arch-breaking rod 51, extends outward and passes through the pressure coating tube 2. The drive component 61 is a motor equipped with a gear transmission assembly. The output end of the motor establishes a transmission connection with the end of the drive rod 62 that extends out of the pressure coating tube 2 through the gear transmission assembly.

[0044] During operation, the torque output by the motor is transmitted to the drive rod 62 through the gear transmission assembly. The drive component 61 drives the drive rod 62 to rotate within the pressure coating tube 2. The rotating drive rod 62 further drives the end-connected arch-breaking rod 51 to rotate synchronously, thereby completing the driving and control of the rotation of the arch-breaking rod 51.

[0045] The drive rod 62 and the pressure coating tube 2 are arranged coaxially, with their central axes coinciding. The drive rod 62 has a through-type wire-passing groove 7 along its own axis, through which the welding core 1 can pass, achieving coaxial assembly of the welding core 1 and the drive rod 62. A guide slope 71 is machined at the end of the wire-passing groove 7 away from the arch-breaking rod 51. The guide slope 71 gradually expands in diameter from the port of the wire-passing groove 7 outwards, and the inner diameter of the outer port of the guide slope 71 is significantly larger than the inner diameter of the main body of the wire-passing groove 7, forming a tapered guide flaring structure.

[0046] During operation, the drive rod 62 can rotate around the outer circumference of the welding core 1. The through-type wire groove 7 provides a continuous conveying channel for the welding core 1, so that the rotation of the drive rod 62 and the axial feed of the welding core 1 do not interfere with each other, ensuring that the welding core 1 can be continuously and smoothly conveyed forward.

[0047] During the wire feeding and insertion stages of the welding core 1, the guide bevel 71 guides and corrects the end of the welding core 1, facilitating its smooth alignment and insertion into the wire feeding groove 7, reducing the difficulty of welding core 1 insertion, and avoiding the problems of the welding core 1 end easily getting stuck and difficult to align with the wire feeding groove entrance. In addition, the inner wall of the wire feeding groove 7 provides radial limiting and auxiliary support for the welding core 1 during operation, continuously constraining the radial position of the welding core 1, effectively suppressing radial swaying and offset during the conveying process of the welding core 1, and preventing the welding core 1 from deviating from the central axis of the pressure coating tube 2. After the welding core 1 is stably held in the center position of the pressure coating tube 2, the coating material can be evenly applied around the outer circumference of the welding core 1, avoiding the situation where the material is concentrated on one side of the welding core 1 and the coating thickness is insufficient on the other side due to the eccentricity of the welding core 1, eliminating the defect of uneven coating thickness, and effectively improving the overall coating quality and consistency of the surface coating of the welding core 1.

[0048] Reference Figure 4 , Figure 5 , Figure 8 The material leveling mechanism 4 includes a material leveling impeller 41 and a material leveling plate 42. The material leveling impeller 41 is fixedly sleeved on the outer periphery of the drive rod 62 and can rotate synchronously with the drive rod 62. The material leveling plate 42 is assembled between the material leveling chamber 22 and the pressure coating chamber 23. That is, the material leveling plate 42 divides the inside of the pressure coating tube 2 to form the material leveling chamber 22 and the pressure coating chamber 23. Several through holes 421 are opened on the plate body of the material leveling plate 42, which form a channel for material flow between the material leveling chamber 22 and the pressure coating chamber 23. The drive rod 62 extends axially, and its end passes through the material leveling plate 42 and is connected to the arch breaking rod 51 to realize synchronous power transmission.

[0049] When the equipment is working, the drive rod 62 rotates continuously under the drive of the drive component 61. On the one hand, it drives the front-end anti-bridging rod 51 to rotate synchronously, performing anti-bridging treatment on the material. On the other hand, the drive rod 62 drives the uniform material impeller 41 fixed thereon to rotate synchronously inside the uniform material chamber 22. The continuously rotating uniform material impeller 41 circulates and stirs the material accumulated inside the uniform material chamber 22, eliminating the uneven density of the material and promoting the uniform density of the material in the uniform material chamber 22 to tend to be uniform. At the same time, the rotating uniform material impeller 41 generates an axial pushing force, continuously pushing the uniformly stirred material in the uniform material chamber 22 through the through hole 421 on the uniform material plate 42 and conveying it into the pressure coating chamber 23. With the synergistic effect of the uniform material impeller 41 stirring and mixing and directional feeding, the material is homogenized before entering the pressure coating chamber 23, ensuring that the material flow rate entering the pressure coating chamber 23 through the through hole 421 is stable and uniformly distributed, effectively avoiding the problems of material deviation and large differences in feed density, and providing material uniformity guarantee for the subsequent pressure coating process.

[0050] Reference Figure 5 , Figure 7 , Figure 8The centerlines of the material leveling chamber 22 and the pressure coating chamber 23 are arranged coaxially, and the material leveling plate 42 is assembled perpendicular to the centerline of the material leveling chamber 22. Multiple through holes 421 are evenly arranged circumferentially around the centerline of the material leveling chamber 22 on the surface of the material leveling plate 42. Material in the material leveling chamber 22 can simultaneously pass through multiple through holes 421 on the material leveling plate 42 and be synchronously transported to the interior of the pressure coating chamber 23 at multiple circumferential positions, forming a multi-point feeding material conveying method. This multi-point feeding structure guides the material to spread rapidly and fully within the pressure coating chamber 23, facilitating the pressure coating process. The material concentration and material layer in the entire cavity 23 tend to be consistent, which improves the uniformity of material distribution in the cavity and effectively suppresses the problem of large accumulation of material in local areas. It avoids the sharp increase of local fluid pressure caused by local material accumulation and prevents uneven pressure distribution and drastic pressure fluctuations in the pressure coating cavity 23. By maintaining a continuous and stable pressure field inside the pressure coating cavity 23, it can reduce the adverse problems caused by abnormal pressure, such as coating thickness deviation, local material shortage, and coating peeling, and continuously ensure the consistency of coating molding on the outer wall of the welding core 1 and the quality of the finished product.

[0051] Reference Figure 1 , Figure 2 , Figure 4 The feeding mechanism 3 includes a feeding hopper 31, a feeding pipe 32 and a spiral conveyor 33. One end of the feeding pipe 32 is connected to the pressure coating pipe 2. The feeding hopper 31 is fixedly installed on the upper part of the feeding pipe 32 and communicates with its inner cavity. The spiral conveyor 33 is rotatably assembled inside the feeding pipe 32, and its axial end extends outward and into the feeding cavity 21.

[0052] During operation, after the material is fed into the feeding hopper 31, it continuously falls into the inner cavity of the feeding pipe 32 under the action of gravity. As the spiral conveyor blade 33 rotates stably, the material in the feeding pipe 32 is continuously transported to the pressure coating pipe 2 by the axial pushing action of the spiral blade, thereby achieving a stable and controllable continuous material supply. At the same time, the end of the spiral conveyor blade 33 extends into the feed chamber 21. After the material leaves the spiral conveyor blade 33 at the end of the conveying stroke, it can be directly fed into the feed chamber 21 without the need for an additional transfer structure. After entering the feed chamber 21, the material flows into the uniform mixing chamber 22 for uniform mixing treatment, ensuring that the material state is uniform in subsequent processes.

[0053] Reference Figure 4 , Figure 5 , Figure 6 The forming mechanism 8 includes a first mold 81 and a second mold 82. Both the first mold 81 and the second mold 82 have forming holes 9 at their center positions. Each forming hole 9 is arranged coaxially with the center line of the pressure coating tube 2. The first mold 81 is installed at the end of the pressure coating tube 2 by bolts and nuts, and the second mold 82 is installed on the outside of the first mold 81 by bolts and nuts. The end of the first mold 81 facing the pressure coating tube 2 is provided with a forming guide surface 811.

[0054] During the continuous forward conveying of the welding core 1, it passes sequentially through the forming guide surface 811 and the forming hole 9. Along the conveying direction of the welding core 1, the flow section of the forming guide surface 811 has a gradually narrowing structure. When the flux material moves forward with the welding core 1, the gradually narrowing forming guide surface 811 generates a gathering and squeezing effect, causing the material to adhere and coat the outer circumference of the welding core 1 evenly. Subsequently, the welding core 1 carries the material through the forming hole 9 of the mold. The forming hole 9 performs outer diameter regularization and forming correction on the coated flux, finally completing the continuous pressure coating forming process of the flux coating on the outer surface of the welding core 1. In addition, the second mold 82 and the first mold 81 are detachably connected by bolts and nuts. When it is necessary to perform pressure coating processing on welding cores 1 with different diameter specifications, the second mold 82 with a different inner diameter forming hole 9 can be replaced to adapt to the production and processing needs of welding cores 1 of various specifications.

[0055] Reference Figure 6 The forming guide surface 811 of the mold 81 is provided with an installation groove 812. The auxiliary ring 52 is rotatably assembled in the installation groove 812. The installation groove 812 and the auxiliary ring 52 are used to form a cooperation to support the auxiliary ring 52, thereby improving the stability of the drive rod 62 under rotation.

[0056] The implementation principle of this invention is as follows: The material is fed into the interior of the pressure coating pipe 2 through the feeding chamber 21, flows through the feeding chamber 21 and the uniform material chamber 22 in sequence, and then enters the pressure coating chamber 23. After entering the uniform material chamber 22, the material is homogenized and uniformly transported to the pressure coating chamber 23 under the combined action of the rotation and stirring of the uniform material impeller 41 and the diversion and flow restriction of several through holes 421 on the uniform material plate 42. The welding core 1 continuously and uniformly passes through the interior of the pressure coating chamber 23. The high-pressure material entering the pressure coating chamber 23 continuously adheres to and coats the outer surface of the welding core 1. During the process of the material coating the welding core 1, multiple arch-breaking rods 51 rotate synchronously around the axis of the welding core 1, continuously disturbing the material in the surrounding area of ​​the welding core 1, effectively breaking the material arch formed by the accumulation of material, preventing material bridging, stagnation and arching, and avoiding problems such as poor local material flow and uneven material layer thickness. By cooperating with the uniform impeller 41 and the through hole 421, the overall material flow and density of the pressure coating chamber 23 are uniformly distributed. With the cooperation of the rotating arch-breaking rod 51, on the one hand, the material arching and bridging is eliminated, and on the other hand, the material around the welding core 1 is continuously stirred, so that the material distribution around the welding core 1 tends to be consistent, ensuring that the material can uniformly and continuously coat the welding core 1, and improving the quality of the coating molding.

[0057] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A welding electrode coating pressure coating forming device, comprising a coating tube and a welding core passing through the center of the coating tube, characterized in that: The inner cavity of the pressure coating tube is sequentially arranged with a feeding chamber, a uniform material chamber, and a pressure coating chamber along the welding core conveying direction. The pressure coating tube is equipped with a feeding mechanism connected to the feeding chamber, a uniform material mechanism located in the uniform material chamber, an arch-breaking mechanism located in the pressure coating chamber, and a driving mechanism for driving the uniform material mechanism and the arch-breaking mechanism. The arch-breaking mechanism includes multiple arch-breaking rods arranged circumferentially around the welding core, which are parallel to the welding core and spaced apart from each other. The material is conveyed to the feeding chamber by the feeding mechanism and flows sequentially through the feeding chamber and the uniform material chamber before entering the pressure coating chamber. The driving mechanism drives the uniform material mechanism to perform uniform pressure treatment on the material in the uniform material chamber, so that the material is evenly conveyed to the pressure coating chamber. At the same time, the driving mechanism drives the arch-breaking rods to rotate around the welding core to eliminate the arching phenomenon of the material around the welding core.

2. The electrode coating pressing and forming device according to claim 1, characterized in that, The drive mechanism includes a drive component and a drive rod. The drive rod is rotatably assembled inside the pressure coating tube. One end of the drive rod is connected to the arch-breaking rod, and the other end extends to the outside of the pressure coating tube and is connected to the output end of the drive component.

3. The electrode coating pressing and forming device according to claim 2, characterized in that, The material leveling mechanism includes a material leveling impeller and a material leveling plate. The material leveling impeller is fixedly sleeved on the outside of the drive rod. The material leveling plate is located between the material leveling chamber and the pressure coating chamber. The material leveling plate has a through hole connecting the material leveling chamber and the pressure coating chamber. The end of the drive rod passes through the material leveling plate and is connected to the arch-breaking rod.

4. The electrode coating forming device according to claim 3, characterized in that, The center lines of the uniform material chamber and the pressure coating chamber are on the same straight line. The uniform material plate is perpendicular to the center line of the uniform material chamber, and multiple through holes are arranged circumferentially around the center line of the uniform material chamber.

5. The electrode coating pressing and forming device according to claim 1, characterized in that, The feeding mechanism includes a feeding hopper, a feeding pipe and a screw conveyor. The feeding pipe is connected to the coating pipe, the feeding hopper is located on the feeding pipe, and the screw conveyor is rotatably assembled inside the feeding pipe.

6. The electrode coating pressing and forming device according to claim 5, characterized in that, The ends of the spiral conveyor blades extend into the feed chamber.

7. The electrode coating pressing and forming device according to claim 2, characterized in that, The drive rod has a through-hole along the axial direction, through which the welding core is threaded.

8. The electrode coating pressing and forming device according to claim 7, characterized in that, A guide slope is provided at the end of the wire-threading groove that is away from the end of the arch-breaking rod.

9. The electrode coating pressing and forming device according to claim 2, characterized in that, The end of the pressure coating tube is provided with a forming mechanism, which includes mold one and mold two. Both mold one and mold two have forming holes at their centers. The forming holes are concentric with the center line of the pressure coating tube. Mold one is installed on the pressure coating tube, and mold two is installed on mold one. Mold one has a forming guide surface on the side near the pressure coating tube.

10. The electrode coating pressing and forming device according to claim 9, characterized in that, An auxiliary ring is provided at the end of the arch-breaking rod away from the drive rod. The auxiliary ring is connected to multiple arch-breaking rods and is sleeved on the outside of the welding core. An installation groove is provided on the forming guide surface of the mold, and the auxiliary ring is rotatably assembled in the installation groove.

Images