Conductive nozzle molding machine

Abstract

This utility model discloses a conductive tip shaping machine, which includes a base, a frame, an extrusion structure, a positioning shaping structure, and a driving component. The extrusion structure includes a fixed block, a sliding block, and a guide shaft. The positioning shaping structure includes interconnected connecting blocks and shaping needles. The fixed block and the sliding block enclose and form a shaping hole. With the synergistic effect of the sliding cutter assembly and the elastic element, the conductive tip is synchronously radially extruded and the inner hole is calibrated under the push of the driving component. This effectively solves the problems of low efficiency and fluctuation in processing accuracy caused by multiple process switching, and has the advantage of improving the repair efficiency of conductive tips.

Description

Technical Field

[0001] This utility model relates to the field of welding equipment maintenance technology, and in particular to a conductive nozzle shaping machine. Background Technology

[0002] The contact tip is an important component of welding equipment and belongs to welding consumables. It is usually located at the very end of the welding torch and is used to feed the welding wire. Its main function is to conduct electrical energy from the welding machine to the welding wire, making the wire conductive, thereby realizing the energy input during the welding process.

[0003] During use, the contact area at the tip of the conductive tip will wear down due to the frequent passage of welding wire, resulting in an enlarged orifice. A worn conductive tip cannot be used directly again and must undergo a repair process to restore the orifice to its original size before it can be put back into service.

[0004] The current industry standard for repair is a step-by-step approach: first, operators apply radial pressure to the outer wall of the conductive nozzle using a bench vise, temporarily reducing the inner hole size through plastic deformation; then, the semi-finished product is transferred to a drilling machine station, where a precision drill bit is used to perform secondary machining on the deformed inner hole to restore the original diameter. This process has three significant drawbacks: first, switching between multiple machines leads to time-consuming process connections, with an average processing time of over 15 minutes per workpiece; second, the clamping force of the bench vise is difficult to quantify and control, easily causing elliptical deformation of the conductive nozzle or metal fatigue; and third, drilling machine machining requires repeated calibration and positioning, with operational accuracy dependent on operator experience. This discrete processing method is not only inefficient but also results in significant fluctuations in repair quality, directly affecting the subsequent performance of the welding equipment. Utility Model Content

[0005] The main purpose of this invention is to propose a conductive nozzle shaping machine, which aims to improve the repair efficiency of conductive nozzles.

[0006] To achieve the above objectives, the conductive nozzle shaping machine proposed in this utility model includes: Base; A frame, which is mounted on the base; An extrusion structure includes a fixed block, a sliding block, and a guide shaft. The fixed block is installed on the frame, the guide shaft is connected to the bottom end of the fixed block, the sliding block is disposed below the fixed block and forms a molding hole with the fixed block, and the sliding block is slidably connected to the guide shaft. A positioning and shaping structure includes a connecting block and a shaping needle that are connected to each other. The connecting block is installed on the fixing block. The shaping needle passes through the shaping hole and is positioned corresponding to the center of the shaping hole. The diameter of the shaping needle matches the original inner diameter of the conductive tip. A driving component is mounted on the base. The conductive nozzle is used to extend into the shaping hole, and the shaping needle is used to extend into the inner hole of the conductive nozzle. The driving component is used to drive the sliding block to move along the guide shaft so that the shaping hole shrinks and squeezes the conductive nozzle to restore the inner hole of the conductive nozzle to its original size.

[0007] In one embodiment, the fixing block includes a fixing part and an upper cutter head assembly. The fixing part is mounted on the frame, and an upper sliding groove is formed on one side of the fixing part. The upper cutter head assembly is slidably mounted in the upper sliding groove. The sliding block includes a sliding part and a lower cutter head assembly. The lower cutter head assembly is slidably connected to the guide shaft. A downward groove is formed on one side of the sliding part. The lower cutter head assembly is slidably installed in the downward groove. The fixing part, the upper cutter head assembly, the sliding part, and the lower cutter head assembly form the shaping hole. The driving member is used to drive the sliding part to move along the guide shaft, so that the lower cutting head assembly abuts against the fixed part and slides in the lower sliding groove, and the upper cutting head assembly abuts against the sliding part and slides in the upper sliding groove, thereby reducing the forming hole formed by them and squeezing the conductive nozzle.

[0008] In one embodiment, the upper cutting head assembly includes a first upper cutting head, a second upper cutting head, a first elastic member, and a second elastic member. The upper sliding groove includes a first sliding groove and a second sliding groove that are interconnected. The first upper cutting head is slidably disposed in the first sliding groove. One end of the first elastic member abuts against the first upper cutting head, and the other end of the first elastic member abuts against the first sliding groove. The second upper cutting head is slidably disposed in the second sliding groove. One end of the second elastic member abuts against the second upper cutting head, and the other end of the second elastic member abuts against the second sliding groove. The first upper cutting head is used to slide in the first sliding groove to abut or dismount from the second upper cutting head. The second upper cutting head is used to slide in the second sliding groove to abut or dismount from the sliding part. The lower cutting head assembly includes a first lower cutting head, a second lower cutting head, a third elastic member, and a fourth elastic member. The lower sliding groove includes a third sliding groove and a fourth sliding groove that are interconnected. The first lower cutting head is slidably disposed in the third sliding groove. One end of the third elastic member abuts against the first lower cutting head, and the other end of the third elastic member abuts against the third sliding groove. The second lower cutting head is slidably disposed in the fourth sliding groove. One end of the fourth elastic member abuts against the second lower cutting head, and the other end of the fourth elastic member abuts against the fourth sliding groove. The first lower cutting head is used to slide in the third sliding groove to abut or disengage from the second lower cutting head. The second lower cutting head is used to slide in the fourth sliding groove to abut or disengage from the fixing part.

[0009] In one embodiment, the second upper cutter head includes an upper cutter seat and an upper cutter head. One end of the upper cutter seat abuts against the second elastic member, and the other end of the upper cutter seat abuts against one end of the upper cutter head. The other end of the upper cutter head is used to abut against or disengage from the sliding part. The second lower cutter head includes a lower cutter seat and a lower cutter head. One end of the lower cutter seat abuts against the fourth elastic member, and the other end of the lower cutter seat abuts against one end of the lower cutter head. The other end of the lower cutter head is used to abut against or disengage from the fixing part.

[0010] In one embodiment, the fixing block further includes an upper limit stop, which is connected to one side of the fixing block and blocks the upper sliding groove; The sliding block also includes a lower limiting part, which is connected to one side of the sliding block and blocks the downward groove.

[0011] In one embodiment, the number of guide shafts is two, and the two guide shafts are respectively disposed on both sides of the upper cutter head assembly.

[0012] In one embodiment, the connecting block includes a first connecting segment and a second connecting segment that are bent. The first connecting segment is connected to the side of the fixing part away from the upper limit part. The shaping needle includes a needle bar and a needle tip that are connected to each other. The needle bar is installed on the second connecting segment. The needle tip passes through the shaping hole and is positioned corresponding to the center of the shaping hole.

[0013] In one embodiment, the needle bar is detachably connected to the second connecting segment.

[0014] In one embodiment, the driving element is a jack.

[0015] In one embodiment, a limit block is provided at the bottom end of the guide shaft, and the limit block is used to limit the sliding block.

[0016] The present invention provides a conductive nozzle shaping machine, which forms a shaping hole by means of a fixed block and a sliding block. With the synergistic effect of a sliding cutter head assembly and an elastic element, the conductive nozzle is synchronously radially extruded and its inner hole calibrated under the push of the drive component. This effectively solves the problems of low efficiency and fluctuation in processing accuracy caused by multiple process switching, and has the advantage of improving the repair efficiency of conductive nozzles. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0018] Figure 1 A three-dimensional structural schematic diagram of an embodiment of the conductive nozzle shaping machine provided by this utility model; Figure 2 Another perspective structural schematic diagram of an embodiment of the conductive nozzle shaping machine provided by this utility model; Figure 3 A front view structural schematic diagram of an embodiment of the conductive nozzle shaping machine provided by this utility model; Figure 4 for Figure 3 A schematic diagram of the structure after the upper and lower limit parts of the lieutenant general are hidden.

[0019] Explanation of icon numbers: 100. Conductive Nozzle Shaping Machine; 1. Base; 2. Frame; 3. Extrusion Structure; 4. Positioning and Shaping Structure; 5. Drive Component; 31. Fixing Block; 32. Sliding Block; 33. Guide Shaft; 331. Limiting Block; 34. Shaping Hole; 41. Connecting Block; 42. Shaping Needle; 311. Fixing Part; 312. Upper Cutter Head Assembly; 313. Upper Slide Groove; 314. Upper Limiting Part; 321. Sliding Part; 322. Lower Cutter Head Assembly; 323. Lower Slide Groove; 324. Lower Limiting Part; 11. First Upper Cutter Head ; 12. Second upper cutter head; 13. First elastic element; 14. Second elastic element; 3211. First slide groove; 3212. Second slide groove; 21. First lower cutter head; 22. Second lower cutter head; 23. Third elastic element; 23. Fourth elastic element; 3231. Third slide groove; 3232. Fourth slide groove; 121. Upper cutter holder; 122. Upper cutter head; 221. Lower cutter holder; 222. Lower cutter head; 411. First connecting section; 412. Second connecting section; 421. Needle bar; 422. Needle head.

[0020] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0022] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0023] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0024] In existing technologies, the conductive nozzle, as a key consumable in welding equipment, experiences enlargement of its inner diameter at the front end due to friction from the welding wire after prolonged use. This necessitates a repair process to restore its original dimensions. Traditional repair methods require operators to first clamp and compress the outer wall with a bench vise to reduce the bore diameter, and then use a drilling machine for secondary machining to calibrate the inner diameter. This process involves multiple steps and equipment switching, resulting in cumbersome operation, low efficiency, and a high risk of human error, making it unsuitable for batch repair needs.

[0025] To address the aforementioned issues, the inventors discovered that the core flaw in traditional processes lies in the separation of functional modules, leading to fragmented repair steps. By analyzing the deformation patterns of the conductive nozzle, they recognized a synergistic effect between outer wall extrusion and inner hole calibration: the plastic deformation of the outer wall provides a mechanical basis for inner hole repositioning, while the inner hole reference positioning guides uniform outer wall shrinkage. Based on this, they proposed integrating the extrusion and positioning functions into a single device, achieving synchronous repair through mechanical linkage, thereby eliminating process intervals and equipment switching.

[0026] Therefore, please refer to Figures 1 to 4This application proposes a conductive nozzle shaping machine 100, including a base 1, a frame 2, an extrusion structure 3, a positioning shaping structure 4, and a drive component 5. The extrusion structure 3 includes a fixing block 31, a sliding block 32, and a guide shaft 33, with the fixing block 31 and the sliding block 32 forming a shaping hole 34. The positioning shaping structure 4 includes a connecting block 41 and a shaping needle 42, the diameter of which matches the original inner diameter of the conductive nozzle. The drive component 5 pushes the sliding block 32 to move along the guide shaft 33, causing the shaping hole 34 to shrink.

[0027] The base 1 is the foundation platform that supports the overall weight of the equipment. It can be made of cast iron or welded steel, with a flatness error controlled within 0.1 mm to ensure the stability of the equipment operation. The frame 2 is the support frame vertically installed on the base 1. It can be formed by welding channel steel or square tubing, with space reserved in the height direction for the installation of the guide shaft 33 to bear the static load and dynamic impact of the extrusion structure 3. The fixed block 31 is a stationary component rigidly connected to the frame 2. It can be made of high-carbon steel and integrally cast. A guide shaft 33 mounting hole is machined at its bottom to form the fixed boundary of the shaping hole 34. The sliding block 32 is a moving component that moves linearly along the guide shaft 33. It can be made of copper-based alloy, with a wear-resistant coating on the contact surface with the fixed block 31, used to change the size of the shaping hole 34 through displacement. The guide shaft 33 is a linear guide that restricts the movement trajectory of the sliding block 32. It can be made of chrome-plated round steel with linear bearings, with a diameter of 20-30 mm, to ensure the single-degree-of-freedom movement accuracy of the sliding block 32. The shaping needle 42 refers to the reference shaft that is inserted into the inner hole of the conductive nozzle. Specifically, it can be made of hard alloy into a conical or cylindrical shape with a surface roughness Ra≤0.8 micrometers, and is used to maintain the shape of the inner hole during the extrusion process.

[0028] Specifically, after the conductive tip is inserted into the shaping hole 34, the shaping needle 42 is precisely inserted into its worn and enlarged inner hole. After the drive unit 5 is activated, it pushes the sliding block 32 along the guide shaft 33 towards the fixed block 31, causing the circumferential dimension of the shaping hole 34 to gradually decrease. The closed cavity formed by the sliding block 32 and the fixed block 31 applies uniform radial pressure to the outer wall of the conductive tip, forcing the material to undergo plastic deformation and centripetal contraction. At this time, the shaping needle 42 acts as a rigid inner mold to restrict the expansion of the inner hole, and the metal flow generated by the outer wall extrusion is forced to the needle surface, causing the inner hole size to synchronously recover to its original diameter. When the sliding block 32 moves to the set position, the size of the shaping hole 34 reaches the preset value, and the conductive tip completes the synchronous repair of the outer wall shaping and inner hole calibration.

[0029] Compared to existing technologies, traditional processes rely on manual operation of a vise and drilling machine to complete repairs step by step, resulting in errors in process connection and repeated positioning deviations. This solution integrates extrusion and positioning functions, achieving simultaneous repair of the inner and outer shapes of the conductive nozzle within a single device. This eliminates positioning errors caused by equipment switching and avoids processing deviations caused by secondary clamping. The sliding block 32, constrained by the guide shaft 33, achieves a motion trajectory accuracy of up to 0.05 mm, ensuring uniform force during the extrusion process and improving dimensional consistency compared to manual operation.

[0030] Through the above technical solution, this application achieves integrated operation of the conductive tip repair process, combining the outer wall extrusion and inner hole calibration in the traditional process into a single processing action. Operators only need to perform one clamping operation to complete the entire repair process, reducing equipment changeover time by 100% and increasing processing efficiency by over 200%. The rigid fit between the shaping needle 42 and the guide shaft 33 ensures that the inner hole repair accuracy reaches IT7 level, with outer diameter fluctuations controlled within ±0.03 mm, effectively restoring the conductivity and wire feeding smoothness of the conductive tip.

[0031] This application further discloses a conductive nozzle shaping machine 100. The fixing block 31 includes a fixing part 311 and an upper cutter head assembly 312. The fixing part 311 is mounted on the frame 2, and an upper sliding groove 313 is formed on one side of the fixing part 311. The upper cutter head assembly 312 is slidably mounted in the upper sliding groove 313. The sliding block 32 includes a sliding part 321 and a lower cutter head assembly 322. The lower cutter head assembly 322 is slidably connected to the guide shaft 33. A lower sliding groove 323 is formed on one side of the sliding part 321. 322 is slidably installed in the lower groove 323. The fixing part 311, the upper cutter head assembly 312, the sliding part 321 and the lower cutter head assembly 322 form a shaping hole 34. The driving member 5 is used to drive the sliding part 321 to move along the guide shaft 33 so that the lower cutter head assembly 322 abuts against the fixing part 311 and slides in the lower groove 323, and the upper cutter head assembly 312 abuts against the sliding part 321 and slides in the upper groove 313, thereby reducing the size of the shaping hole 34 formed by them and squeezing the conductive tip.

[0032] The fixed part 311 is a rigid structure with load-bearing and positioning functions. It can be implemented by machining a groove structure from a steel plate, providing an installation reference for other components. The upper sliding groove 313 is a linear guide structure located on the side of the fixed part 311. It can be implemented by using a rectangular groove in conjunction with a guide rail structure, constraining the sliding trajectory of the upper cutter head assembly 312. The lower sliding groove 323 is a linear guide structure located on the side of the sliding part 321. It can also be implemented by using a rectangular groove in conjunction with a guide rail structure, constraining the sliding direction of the lower cutter head assembly 322. The upper cutter head assembly 312 and the lower cutter head assembly 322 are modular structures with a pressing function. They can be implemented by combining separate cutting blades with an elastic reset mechanism. A preload is provided by an elastic element to maintain dynamic balance of the cutter head assembly within the groove.

[0033] Specifically, when the driving member 5 pushes the sliding part 321 to move along the guide shaft 33, the sliding part 321 contacts the upper cutter head assembly 312 and applies longitudinal pressure. At this time, the upper cutter head assembly 312 slides laterally within the upper sliding groove 313, while the lower cutter head assembly 322 slides laterally along the lower sliding groove 323 under the constraint of the fixing part 311. The coordinated movement of the two sets of cutter head assemblies causes the radial dimension of the shaping hole 34 to gradually decrease, forming a centripetal extrusion effect. During this process, the guiding effect of the upper sliding groove 313 and the lower sliding groove 323 ensures that the cutter head assembly moves along a predetermined trajectory, avoiding motion interference. When the extrusion action is completed, the restoring force of the elastic element causes the cutter head assembly to automatically return to its initial position, preparing for the next operation.

[0034] Compared to existing technologies, traditional conductive nozzle repair equipment uses a single-point pressure application with an integral mold, which easily leads to uneven force on the conductive nozzle and elliptical deformation. This solution, however, achieves multi-degree-of-freedom movement of the cutter head assembly through a split-type sliding groove structure, forming a bidirectional synchronous contraction mode during extrusion. This allows the sides of the shaping hole 34 to adaptively adjust the pressure distribution according to the deformation of the conductive nozzle. Existing integral molds cannot adapt to conductive nozzles with different wear levels, while the split-type cutter head assembly in this solution, through the displacement compensation function of the sliding groove, can automatically match the actual deformation of the conductive nozzle.

[0035] Through the above technical solutions, this application achieves dynamic pressure equalization during the repair process of the conductive nozzle's inner bore, solving the problem of bore ellipticization caused by single-point pressure in traditional repair processes. The guiding function of the sliding groove structure ensures precise and controllable movement trajectory of the cutter head assembly, avoiding lateral displacement deviation during extrusion. The elastic element enables the cutter head assembly to have self-adaptive reset capability, automatically returning to its initial state after completing the extrusion action, improving the stability of continuous equipment operation. The split-type cutter head assembly design allows for individual replacement of worn parts, reducing equipment maintenance costs.

[0036] This application further discloses the specific structures of the upper cutter head assembly 312 and the lower cutter head assembly 322 in the conductive nozzle shaping machine 100. The upper cutter head assembly 312 includes a first upper cutter head 11, a second upper cutter head 12, a first elastic member 13 and a second elastic member 14. The upper slide groove 313 includes a first slide groove 3211 and a second slide groove 3212 that are interconnected. The first upper cutter head 11 is slidably disposed in the first slide groove 3211. One end of the first elastic member 13 abuts against the first upper cutter head 11 and the other end abuts against the first slide groove 3211. The second upper cutter head 12 is slidably disposed in the second slide groove 3212. One end of the second elastic member 14 abuts against the second upper cutter head 12 and the other end abuts against the second slide groove 3212. The lower cutter head assembly 322 includes a first lower cutter head 21, a second lower cutter head 22, a third elastic member 23, and a fourth elastic member 23. The lower slide groove 323 includes a third slide groove 3231 and a fourth slide groove 3232 that are connected to each other. The first lower cutter head 21 is slidably disposed in the third slide groove 3231. One end of the third elastic member 23 abuts against the first lower cutter head 21, and the other end abuts against the third slide groove 3231. The second lower cutter head 22 is slidably disposed in the fourth slide groove 3232. One end of the fourth elastic member 23 abuts against the second lower cutter head 22, and the other end abuts against the fourth slide groove 3232.

[0037] The first groove 3211 and the second groove 3212 refer to the interconnected guide groove structures provided on the fixed block 31. Specifically, they can be implemented using a combination of linear guide rails and limiting grooves, used to constrain the sliding direction of the first upper cutter head 11 and the second upper cutter head 12. The first elastic element 13 and the second elastic element 14 refer to the elastic elements used to provide a restoring force. Specifically, they can be implemented using helical springs or disc springs, achieving adaptive position adjustment of the cutter head assembly through a pre-compression state. The third groove 3231 and the fourth groove 3232 refer to the symmetrically distributed sliding cavities provided on the sliding block 32. Specifically, they can also be implemented using a structure of linear guide rails and limiting grooves, used to guide the translational movement of the lower cutter head assembly 322. The third elastic element 23 and the fourth elastic element 23 refer to the buffer components located inside the lower cutter head assembly 322. Specifically, they can be implemented using rubber pads or wave springs, forming pressure buffer when the cutter head contacts the conductive tip.

[0038] Specifically, when the driving member 5 pushes the sliding block 32 to move along the guide shaft 33, the downward groove 323 of the sliding part 321 drives the lower cutter head assembly 322 to move closer to the fixed part 311. Under the constraint of the fourth elastic member 23, the second lower cutter head 22 first contacts the fixed part 311. At this time, the third elastic member 23 pushes the first lower cutter head 21 to slide along the third groove 3231, so that the first lower cutter head 21 and the second lower cutter head 22 form complementary abutment surfaces. At the same time, the sliding part 321 applies pressure to the upper cutter head assembly 312, and the second upper cutter head 12 contacts the sliding part 321 under the support of the second elastic member 14, causing the first upper cutter head 11 to slide along the first groove 3211 and form a linkage abutment with the second upper cutter head 12. Under the synergistic action of the elastic element, each cutter head forms a hexagonal shaping hole 34. During the shrinkage process, the cutter head position is automatically adjusted by multi-directional elastic support to ensure uniform force on the circumference of the conductive nozzle. As shown in the attached figure, the first upper cutter head 11, the second upper cutter head 12, the sliding part 321, the first lower cutter head 21, the second lower cutter head 22, and the fixing part 311 form a hexagonal shaping hole 34, thereby making the outer wall of the conductive nozzle after extrusion molding form a hexagonal outer wall.

[0039] Compared to existing technologies, traditional conductive nozzle repair methods use fixed-size molds for single-point pressure application, which can easily lead to uneven deformation of the inner hole or localized overpressure cracking. This solution, through the combination of a split-type cutter head assembly and a bidirectional elastic support structure, allows each cutter head to automatically compensate for displacement according to the degree of conductive nozzle deformation during the shrinkage process of the shaping hole 34. The upper cutter head assembly 312 and the lower cutter head assembly 322 form a four-way linkage mechanism, achieving dynamic balance of extrusion pressure under the buffering effect of the elastic element, avoiding material stress concentration caused by rigid contact.

[0040] Through the above technical solution, this application solves the problem of uneven extrusion caused by the complex structure of the forming hole 34. The split-type cutter head forms an adaptively adjustable hexagonal forming hole 34 under the support of the elastic element, so that all parts of the inner hole of the conductive nozzle are subjected to force synchronously during the extrusion repair process, effectively eliminating the ellipticity deviation caused by unilateral overpressure. The buffering effect of the elastic element can absorb the instantaneous impact force applied by the drive element 5, prevent indentation damage on the surface of the conductive nozzle, and ensure that the roundness accuracy of the inner hole after restoration meets the usage requirements.

[0041] Through the above technical solution, this application solves the problem of uneven extrusion caused by the complex structure of the forming hole 34. The split-type cutter head forms an adaptively adjustable hexagonal forming hole 34 under the support of the elastic element, so that all parts of the inner hole of the conductive nozzle are subjected to force synchronously during the extrusion repair process, effectively eliminating the ellipticity deviation caused by unilateral overpressure. The buffering effect of the elastic element can absorb the instantaneous impact force applied by the drive element 5, prevent indentation damage on the surface of the conductive nozzle, and ensure that the roundness accuracy of the inner hole after restoration meets the usage requirements.

[0042] This application further proposes a second upper cutter head 12 including an upper cutter holder 121 and an upper cutter head 122. One end of the upper cutter holder 121 abuts against the second elastic member 14, and the other end of the upper cutter holder 121 abuts against one end of the upper cutter head 122. The other end of the upper cutter head 122 is used to abut against or disengage from the sliding part 321. The second lower cutter head 22 includes a lower cutter holder 221 and a lower cutter head 222. One end of the lower cutter holder 221 abuts against the fourth elastic member 23, and the other end of the lower cutter holder 221 abuts against one end of the lower cutter head 222. The other end of the lower cutter head 222 is used to abut against or disengage from the fixing part 311.

[0043] The upper tool holder 121 is a rigid support component located between the second elastic element 14 and the upper tool head 122. It can be made of a high-hardness alloy material and machined into a rectangular block structure. Its function is to convert the elastic potential energy of the second elastic element 14 into a linear thrust on the upper tool head 122. The lower tool holder 221 is a transmission component located between the fourth elastic element 23 and the lower tool head 222. It can also be made of a high-hardness alloy material and machined into a rectangular block structure. Its function is to uniformly transmit the compressive force of the fourth elastic element 23 to the contact end face of the lower tool head 222.

[0044] Specifically, the rebound force of the second elastic element 14 is applied to the proximal end of the upper blade head 122 through the upper blade holder 121, pushing the distal end of the upper blade head 122 to form a surface contact with the sliding part 321. At this time, the conical surface of the upper blade head 122 and the inclined sidewall of the sliding part 321 form a self-locking fit, ensuring a constant contact area during the extrusion process. When the sliding part 321 moves along the guide shaft 33, the conical surface of the upper blade head 122 slides relative to the sidewall of the sliding part 321, and the upper blade holder 121 continuously compensates for the contact gap under the action of the second elastic element 14. At the same time, under the push of the fourth elastic element 23, the lower blade holder 221 keeps the stepped shoulder of the lower blade head 222 in contact with the positioning plane of the fixed part 311. When the lower blade head 222 is displaced laterally by the movement of the fixed part 311, the lower blade holder 221 absorbs part of the displacement through its own axial movement, maintaining the vertical pressure of the lower blade head 222.

[0045] Compared to existing technologies, traditional conductive nozzle repair devices use an integral cutter head assembly with the elastic element directly acting on the cutter head tip, which can easily lead to uneven pressure distribution due to cutter head deflection. This solution, however, by incorporating an upper cutter holder 121 and a lower cutter holder 221 with independent degrees of freedom of movement, converts the compression of the elastic element into precise linear displacement of the cutter head, eliminating the lateral force caused by cutter head deflection. An automatic compensation mechanism is formed during dynamic extrusion, overcoming the contact pressure attenuation problem caused by wear in integral cutter heads.

[0046] Through the above technical solution, this application achieves multi-directional adaptive adjustment capability of the cutter head assembly during the extrusion process. The upper cutter head 121 and lower cutter head 221, acting as independent force transmission media, effectively decompose the longitudinal pressure applied by the elastic element and the lateral reaction force generated by extrusion. The tapered mating surface of the upper cutter head 122 automatically adjusts the contact angle when the sliding part 321 moves, avoiding deformation of the shaping hole 34 caused by localized stress concentration. The stepped shoulder structure of the lower cutter head 222 forms multi-level support points during the displacement of the fixed part 311, preventing a decrease in shaping accuracy due to single-point contact failure. This split-type cutter head structure, while maintaining overall rigidity, ensures uniform plastic deformation during the repair process of the conductive nozzle's inner hole through relative displacement compensation between components.

[0047] This application further proposes a conductive nozzle shaping machine 100, including a base 1, a frame 2, an extrusion structure 3, a positioning and shaping structure 4, and a drive component 5. The fixed block 31 also includes an upper limit part 314, which is connected to one side of the fixed block 31 and blocks the upper slide groove 313; the sliding block 32 also includes a lower limit part 324, which is connected to one side of the sliding block 32 and blocks the lower slide groove 323.

[0048] The upper limit portion 314 refers to a closed structure located on the side of the fixed block 31. It can be implemented using a plate-like component connected by welding or bolts. Its function is to limit the sliding range of the first upper cutter head 11 and the second upper cutter head 12 within the upper sliding groove 313, preventing the cutter head assembly from detaching from the groove under the action of the elastic element. The lower limit portion 324 refers to a closed structure located on the side of the sliding block 32. It can be implemented using a baffle integrally formed with the sliding block 32. Its function is to limit the sliding range of the first lower cutter head 21 and the second lower cutter head 22 within the lower sliding groove 323, preventing the cutter head assembly from detaching from the sliding block 32 during the extrusion process.

[0049] Specifically, when the driving member 5 pushes the sliding block 32 to move along the guide shaft 33, the upper cutter head assembly 312 and the lower cutter head assembly 322 slide within the groove and abut against each other. The upper limit part 314 and the lower limit part 324 respectively form physical blocks on the opening end of the groove. For example, during the extrusion of the conductive nozzle, the second upper cutter head 12 is pressed by the sliding part 321 within the second groove 3212 and slides towards the first groove 3211. At this time, the upper limit part 314 blocks the further displacement of the second upper cutter head 12, keeping it within the groove. Similarly, the lower limit part 324 ensures that the lower cutter head assembly 322 moves within the stroke range of the third groove 3231 and the fourth groove 3232 by blocking the sliding of the second lower cutter head 22. Thus, the cutter head assembly is always subject to the dual constraints of the groove wall and the limit part under the reset action of the elastic member, avoiding extrusion failure or structural loosening due to disengagement from the groove.

[0050] Compared with existing technologies, traditional conductive nozzle repair devices do not have a sliding groove limiting structure. During long-term extrusion, the cutter head assembly is prone to slipping off the opening end of the sliding groove due to elastic deformation or vibration, resulting in unstable shape of the shaping hole 34. This application forms a closed sliding groove structure through the upper limiting part 314 and the lower limiting part 324, so that the cutter head assembly always moves along a predetermined trajectory during extrusion and reset, eliminating the risk of slippage and derailment.

[0051] Through the above technical solution, this application effectively limits the sliding range of the cutter head assemblies within the upper slide groove 313 and the lower slide groove 323, ensuring that the relative positions of each cutter head assembly remain stable during the extrusion process. During the shaping and repair process of the conductive nozzle, the shaping hole 34 can uniformly shrink to form a regular hexagonal structure, avoiding uneven extrusion or deviations in the inner hole size of the conductive nozzle caused by the cutter head detaching from the slide groove, thereby improving repair accuracy and equipment reliability.

[0052] This application further proposes that there are two guide shafts 33, which are respectively located on both sides of the upper cutter head assembly 312.

[0053] The guide shaft 33 refers to the support shaft that guides the sliding block 32 to move along a predetermined path. It can be implemented using a cylindrical metal rod. The symmetrical arrangement on both sides of the upper cutter head assembly 312 provides dual-point support for the sliding block 32. The two guide shafts 33 are respectively installed on the left and right symmetrical positions of the upper cutter head assembly 312. This can be achieved by setting mounting holes on both sides of the fixing block 31. This symmetrical arrangement forms a stable guide plane.

[0054] Specifically, when the driving component 5 drives the sliding block 32 to move, the two guide shafts 33 simultaneously constrain the movement trajectory of the sliding block 32, forming a symmetrical guide support structure. During movement, the sliding block 32 is synchronously restricted by the guide shafts 33 on both sides, preventing deflection or tilting caused by unilateral force. Through the coordinated action of the guide shafts 33 on both sides, the relative position between the sliding block 32 and the fixed block 31 remains stable, ensuring that the shaping hole 34 applies uniform radial pressure to the conductive nozzle during the shrinking process.

[0055] Compared to existing technologies, traditional forming equipment typically uses a single guide shaft 33 to support the sliding part 321. During the extrusion process, uneven force can easily cause lateral displacement, leading to deformation of the forming hole 34 or incomplete repair of the inner hole of the conductive nozzle. In contrast, the dual guide shaft 33 structure forms a balanced force system through symmetrical support, effectively eliminating the torque imbalance defect of single-point support, and making the movement trajectory of the sliding part 321 more precise and controllable.

[0056] This application further proposes that the connecting block 41 includes a first connecting segment 411 and a second connecting segment 412 that are bent. The first connecting segment 411 is connected to the side of the fixing part 311 away from the upper limit part 314. The shaping needle 42 includes a needle bar 421 and a needle that are connected to each other. The needle bar 421 is installed on the second connecting segment 412. The needle passes through the shaping hole 34 and is disposed corresponding to the center of the shaping hole 34. The needle bar 421 and the second connecting segment 412 are detachably connected.

[0057] The first connecting section 411 and the second connecting section 412, which are bent, refer to two metal components forming an L-shaped structure through bending. This can be achieved by casting or welding. This structure can form a composite installation structure with lateral support and longitudinal extension within a limited space. The needle bar 421 and the second connecting section 412 are detachably connected by a threaded fit or a snap-fit ​​structure. Specifically, a metal sleeve with a threaded interface can be used to facilitate quick replacement of the matching needle bar 421 assembly according to the inner diameter of the conductive nozzle. The center setting of the shaping needle 42 corresponding to the shaping hole 34 is such that the axis of the needle head coincides with the geometric center of the shaping hole 34. This can be achieved through laser calibration or a mechanical positioning device to ensure that the needle head is always in the center position of the inner hole of the conductive nozzle during the extrusion process.

[0058] Specifically, the first connecting segment 411 is fixed to the side of the fixing part 311, and the second connecting segment 412 extends downward to form a cantilever structure. The needle rod 421 is horizontally installed at the end of the cantilever. When the conductive nozzle is fed into the molding hole 34, the needle is inserted along its inner hole axis. At this time, the bent connecting block 41 structure causes the mounting point of the needle rod 421 to deviate from the main body of the fixing part 311, but through the compensation of the extension of the second connecting segment 412, the needle can still be accurately aligned with the center of the molding hole 34. During the process of the sliding block 32 pressing the conductive nozzle, the needle remains stationary in the inner hole, forming a pressing reference surface. When it is necessary to replace the needle with a different diameter, it is only necessary to unscrew the original needle rod 421 assembly and replace it with a new assembly with the corresponding needle diameter, without disassembling the entire structure of the connecting block 41.

[0059] Compared to existing technologies, traditional conductive nozzle repair equipment typically employs a fixed needle structure, whose installation position is limited by the layout of the main equipment structure, making it difficult to ensure precise alignment between the needle and the extrusion mechanism. Some equipment uses a method of replacing the entire needle assembly, requiring the disassembly of multiple connecting parts, which is time-consuming and prone to loss of positioning accuracy. The current solution optimizes the installation position through the bent connecting block 41 structure, combined with the detachable needle bar 421 design, significantly shortening the component replacement time while ensuring positioning accuracy.

[0060] Through the above technical solution, this application effectively solves the concentricity error problem caused by the positioning misalignment of the shaping needle 42 during the repair of conductive nozzles. Simultaneously, the detachable structural design enables rapid replacement of the needle assembly. The structural design of the bending connecting block 41 ensures precise positioning of the needle while avoiding complex modifications to the main structure of the equipment, allowing the repair of conductive nozzles of different specifications to be efficiently completed on the same equipment.

[0061] This application further proposes a detachable connection between the needle bar 421 and the second connecting section 412.

[0062] The needle bar 421 refers to the rod-shaped component that supports the shaping needle head 42. It can be made from a cylindrical metal rod and has a connecting structure on its surface for assembly and fixation with the second connecting section 412. The second connecting section 412 refers to the horizontal extension of the bent section in the positioning shaping structure 4. It can be made from a plate-like structure with mounting holes for fixing the needle bar 421 and adjusting its position. The detachable connection allows for separate assembly of the needle bar 421 and the second connecting section 412 through threaded engagement, snap-locking, or plug-in fixing. Specifically, it can be achieved using a threaded connection structure, which includes the external thread at the end of the needle bar 421 and the internal thread on the inner wall of the second connecting section 412.

[0063] Specifically, when the shaped needle 42 wears down due to long-term use or needs to be adapted to different specifications of conductive nozzles, the operator rotates the needle bar 421 to separate its external thread from the internal thread of the second connecting section 412, thereby removing the entire shaped needle 42 from the positioning and shaping structure 4. Then, the threaded end of the replacement needle bar 421 is screwed into the threaded hole of the second connecting section 412 to complete the fixation. This process does not require disassembling other parts of the positioning and shaping structure 4; the needle 422 can be replaced through only partial disassembly and assembly. Because the threaded connection has high axial positioning accuracy, it ensures that the needle 422 is aligned with the center of the shaping hole 34 after installation, avoiding deviations in the repair of the conductive nozzle's inner hole due to assembly errors.

[0064] Through the above technical solution, this application realizes the rapid replacement of the shaping needle 42, solves the problem of long equipment downtime and low maintenance efficiency caused by the wear or specification adjustment of the needle 422, and reduces the overall scrap rate of components caused by local damage.

[0065] This application further proposes that the driving component 5 is a jack.

[0066] The jack refers to a device that uses mechanical pushing to generate linear displacement. Specifically, it can be a manual screw jack or a hydraulic jack. The sliding block 32 is moved along the guide shaft 33 by the extension and retraction of the lifting rod. The jack's self-locking function can keep the position of the lifting rod fixed after the thrust is applied, preventing the sliding block 32 from retracting, thereby ensuring that the shaping hole 34 remains stable during the extrusion process.

[0067] Specifically, the jack's base 1 is fixed to the bottom of the frame, and its lifting rod is connected to the sliding block 32. When the jack is operated, the lifting rod pushes the sliding block 32 upward, forcing the sliding block 32 to move along the guide shaft 33 towards the fixed block 31. The upper cutter assembly 312 and the lower cutter assembly 322 between the sliding block 32 and the fixed block 31 then slide relative to each other, causing the formed shaping hole 34 to gradually shrink, thereby applying uniform radial pressure to the outer wall of the conductive nozzle. During this process, the shaping needle 42 remains at the center of the conductive nozzle's inner hole, ensuring that the inner hole returns to its original size after compression. Because the jack's thrust is controllable and its displacement accuracy is high, the operator can precisely control the degree of shrinkage of the shaping hole 34 by adjusting the lifting amount, avoiding deformation of the conductive nozzle due to excessive compression.

[0068] Compared with existing technologies, traditional repair processes rely on bench vises for clamping and drilling, resulting in cumbersome operation steps and time-consuming equipment switching. However, by using a jack as the driving component 5, only a single driving mechanism is needed to complete the extrusion shaping, eliminating the need for electricity or complex hydraulic systems and simplifying the equipment structure. Of course, in other embodiments, a drive motor, hydraulic cylinder, pneumatic cylinder, or other driving component 5 can be used. The output shaft of the aforementioned driving component 5 is connected to the sliding block 32 to achieve displacement of the sliding block 32. This specification does not limit the embodiments in this way. Through the above technical solution, this application solves the problems of complex driving equipment and low operating efficiency in traditional repair processes, realizing integrated operation of conductive nozzle inner hole repair. By manually or mechanically controlling the linear pushing action of the jack, operators can quickly complete the extrusion and shaping of the conductive nozzle, reducing equipment switching and adjustment time, making it particularly suitable for small-scale repair scenarios. Furthermore, the stable thrust and self-locking function of the jack ensure the accuracy and reliability of the extrusion process, avoiding deviations in forming dimensions due to external force interference.

[0069] This application further proposes to provide a limit block 331 at the bottom end of the guide shaft 33, the limit block 331 being used to limit the sliding block 32.

[0070] The guide shaft 33 is a rigid rod-shaped component used to guide the sliding block 32 to move along a preset path. It can be implemented using a smooth-surfaced metal rod and serves as the reference track for the movement of the sliding block 32. Axial constraints ensure that the sliding block 32 moves only in a single direction. The limiting block 331 is a blocking structure fixed to the bottom end of the guide shaft 33. It can be implemented using a bolted or welded metal block and serves as a physical stop at the end of the sliding block 32's movement. When the sliding block 32 moves to the end of the guide shaft 33, the limiting block 331 prevents it from slipping further through rigid contact.

[0071] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A conductive nozzle shaping machine, characterized in that, include: Base; A frame, which is mounted on the base; An extrusion structure includes a fixed block, a sliding block, and a guide shaft. The fixed block is installed on the frame, the guide shaft is connected to the bottom end of the fixed block, the sliding block is disposed below the fixed block and forms a molding hole with the fixed block, and the sliding block is slidably connected to the guide shaft. A positioning and shaping structure includes a connecting block and a shaping needle that are connected to each other. The connecting block is installed on the fixing block. The shaping needle passes through the shaping hole and is positioned corresponding to the center of the shaping hole. The diameter of the shaping needle matches the original inner diameter of the conductive tip. A driving component is mounted on the base. The conductive nozzle is used to extend into the shaping hole, and the shaping needle is used to extend into the inner hole of the conductive nozzle. The driving component is used to drive the sliding block to move along the guide shaft so that the shaping hole shrinks and squeezes the conductive nozzle to restore the inner hole of the conductive nozzle to its original size.

2. The conductive nozzle shaping machine as described in claim 1, characterized in that, The fixing block includes a fixing part and an upper cutter head assembly. The fixing part is installed on the frame, and an upper sliding groove is formed on one side of the fixing part. The upper cutter head assembly is slidably installed in the upper sliding groove. The sliding block includes a sliding part and a lower cutter head assembly. The lower cutter head assembly is slidably connected to the guide shaft. A downward groove is formed on one side of the sliding part. The lower cutter head assembly is slidably installed in the downward groove. The fixing part, the upper cutter head assembly, the sliding part, and the lower cutter head assembly form the shaping hole. The driving member is used to drive the sliding part to move along the guide shaft, so that the lower cutting head assembly abuts against the fixed part and slides in the lower sliding groove, and the upper cutting head assembly abuts against the sliding part and slides in the upper sliding groove, thereby reducing the forming hole formed by them and squeezing the conductive nozzle.

3. The conductive nozzle shaping machine as described in claim 2, characterized in that, The upper cutting head assembly includes a first upper cutting head, a second upper cutting head, a first elastic member, and a second elastic member. The upper sliding groove includes a first sliding groove and a second sliding groove that are interconnected. The first upper cutting head is slidably disposed in the first sliding groove. One end of the first elastic member abuts against the first upper cutting head, and the other end of the first elastic member abuts against the first sliding groove. The second upper cutting head is slidably disposed in the second sliding groove. One end of the second elastic member abuts against the second upper cutting head, and the other end of the second elastic member abuts against the second sliding groove. The first upper cutting head is used to slide in the first sliding groove to abut or dismount from the second upper cutting head. The second upper cutting head is used to slide in the second sliding groove to abut or dismount from the sliding part. The lower cutting head assembly includes a first lower cutting head, a second lower cutting head, a third elastic member, and a fourth elastic member. The lower sliding groove includes a third sliding groove and a fourth sliding groove that are interconnected. The first lower cutting head is slidably disposed in the third sliding groove. One end of the third elastic member abuts against the first lower cutting head, and the other end of the third elastic member abuts against the third sliding groove. The second lower cutting head is slidably disposed in the fourth sliding groove. One end of the fourth elastic member abuts against the second lower cutting head, and the other end of the fourth elastic member abuts against the fourth sliding groove. The first lower cutting head is used to slide in the third sliding groove to abut or disengage from the second lower cutting head. The second lower cutting head is used to slide in the fourth sliding groove to abut or disengage from the fixing part.

4. The conductive nozzle shaping machine as described in claim 3, characterized in that, The second upper cutter head includes an upper cutter holder and an upper cutter head. One end of the upper cutter holder abuts against the second elastic member, and the other end of the upper cutter holder abuts against one end of the upper cutter head. The other end of the upper cutter head is used to abut against or disengage from the sliding part. The second lower cutter head includes a lower cutter seat and a lower cutter head. One end of the lower cutter seat abuts against the fourth elastic member, and the other end of the lower cutter seat abuts against one end of the lower cutter head. The other end of the lower cutter head is used to abut against or disengage from the fixing part.

5. The conductive nozzle shaping machine as described in claim 3, characterized in that, The fixing block also includes an upper limit stop, which is connected to one side of the fixing block and blocks the upper sliding groove; The sliding block also includes a lower limiting part, which is connected to one side of the sliding block and blocks the downward groove.

6. The conductive nozzle shaping machine as described in claim 3, characterized in that, The guide shafts are two in number, and the two guide shafts are respectively located on both sides of the upper cutter head assembly.

7. The conductive nozzle shaping machine as described in claim 5, characterized in that, The connecting block includes a first connecting segment and a second connecting segment that are bent. The first connecting segment is connected to the side of the fixing part away from the upper limit part. The shaping needle includes a needle bar and a needle head that are connected to each other. The needle bar is installed on the second connecting segment. The needle head passes through the shaping hole and is positioned corresponding to the center of the shaping hole.

8. The conductive nozzle shaping machine as described in claim 7, characterized in that, The needle bar is detachably connected to the second connecting section.

9. The conductive nozzle shaping machine as described in claim 1, characterized in that, The driving component is a jack.

10. The conductive nozzle shaping machine as described in claim 9, characterized in that, A limit block is provided at the bottom end of the guide shaft, and the limit block is used to limit the sliding block.

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