An automatic stranding and welding apparatus for cable heads

Abstract

The application belongs to the technical field of cable welding, and discloses an automatic wire twisting and welding device for a cable head, which comprises a twisting and welding positioning seat, a layered wire twisting assembly is fixedly installed on the inner side of the twisting and welding positioning seat, guide assemblies are fixedly installed on the left side and the right side of the layered wire twisting assembly, a moving assembly is fixedly installed on the back of the two guide assemblies, a wire placing assembly is movably assembled on the top of the moving assembly, a lifting assembly is fixedly installed on the front side of the wire placing assembly, and a circular uniform welding assembly is fixedly installed on the front side of the lifting assembly. Through the circular uniform welding assembly and the rotatable wire placing assembly which cooperate with each other, the guide pipe can drive the welding wire to make circular motion around the wire butt joint, the welding head synchronously performs circular heating welding on the wire butt joint, uniform and stable conveying of the welding wire and circular synchronous welding are realized, the welding wire is accurately sent to the wire butt joint, circular and uniform welding of the wire butt joint is realized, welding defects such as blowhole, inclusion, crack and uneven weld are effectively avoided, and the welding quality is improved.

Description

Technical Field

[0001] This invention belongs to the field of cable welding technology, specifically an automatic wire rolling and welding device for cable heads. Background Technology

[0002] In fields such as power transmission, communication engineering, and industrial equipment connection, cables serve as the core carrier of energy and signal transmission, and their connection quality directly determines the stability, safety, and service life of the entire transmission system.

[0003] Currently, the industry generally adopts a process of first twisting the wires, then welding, and finally attaching the heat shrink tubing to connect two cable conductors. However, existing operations rely on multiple independent machines to complete the process step by step. In the wire twisting stage, existing wire twisting equipment lacks a targeted layered twisting structure, which cannot adapt to the twisting needs of the cable conductor and the rubber outer layer separately. It also cannot accurately control the force, density, and uniformity of the twisting, which easily leads to problems such as loose twisting resulting in poor conductor connection, or excessive twisting causing damage or breakage of the conductor and the rubber outer layer. Furthermore, existing welding equipment lacks coordination with the wire twisting process, making it impossible to accurately connect the twisted conductors. It also lacks a stable welding wire feeding, welding positioning, and annular heating structure, which easily leads to welding defects such as porosity, inclusions, cracks, and uneven welds. These defects reduce the strength and conductivity of the conductor connection, causing localized heating, poor contact, and even short circuit faults, seriously affecting the transmission efficiency and service life of the cable. Summary of the Invention

[0004] The purpose of this invention is to provide an automatic wire twisting and welding device for cable heads to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an automatic wire rolling and welding device for cable heads, comprising a wire rolling positioning seat, wherein a layered wire rolling assembly for wire rolling processing of the cable head end is fixedly installed on the inner side of the wire rolling positioning seat, guide components are fixedly installed on both the left and right sides of the layered wire rolling assembly, the two guide components are coaxially arranged with the layered wire rolling assembly, a moving assembly is fixedly installed on the back of the two guide components, a wire feeding assembly is movably arranged on the top of the moving assembly, a lifting assembly is fixedly installed on the front side of the wire feeding assembly, and a circumferential welding assembly is fixedly installed on the front side of the lifting assembly; the circumferential welding assembly includes a heating block, a ring motor is fixedly installed on the bottom of the heating block, a clamping block is coaxially fixedly connected to the output shaft of the ring motor, a guide tube for guidance is fixedly clamped on the inner side of the clamping block, a welding head is also fixedly installed on the bottom of the heating block, the welding end of the welding head is correspondingly arranged with the wire outlet of the guide tube, and the guide tube can rotate circumferentially around the joint of the cable head to be welded with the ring motor.

[0006] Furthermore, the layered thread rolling assembly includes an L-shaped plate fixedly installed on the inner wall of the thread rolling positioning seat. Two parallel hydraulic rods are fixedly installed on the inner side of the L-shaped plate. The telescopic ends of the two hydraulic rods are fixedly connected to a rectangular plate. Multiple parallel thread rolling guide rails are fixedly connected to the inner walls of the L-shaped plate and the rectangular plate. Each thread rolling guide rail has a lifting block that can be adjusted along the axial direction of the thread rolling guide rail movably sleeved on its outer edge. Two sets of symmetrically arranged long plates are fixedly installed between the two opposing lifting blocks. A first thread rolling plate is embedded in the inner edge of each set of long plates, and a second thread rolling plate is embedded in the other side of each of the two first thread rolling plates.

[0007] Furthermore, the first rubbing board is made of rubber, and the spacing density of its surface rubbing strips is less than that of the second rubbing board, used to rub the guide wire portion at the end of the cable; the second rubbing board is made of metal, and the spacing density of its surface rubbing strips is greater than that of the first rubbing board, used to rub the rubber outer layer at the end of the cable.

[0008] Furthermore, the guiding component includes an inverted U-shaped plate, which is fixedly installed on the top of the welding positioning seat. The left and right inner walls of the inverted U-shaped plate are elastically connected to a first arc-shaped block and a second arc-shaped block, respectively. Two symmetrical vertical plates are installed through the middle of the first arc-shaped block and the second arc-shaped block. A first guide wheel is rotatably installed between each pair of opposite vertical plates.

[0009] Furthermore, both the first and second arc-shaped blocks are made of elastic metal, and when they are joined together, they form a circular tubular guide channel coaxial with the layered wire twisting assembly; the two first guide wheels are symmetrically distributed in the guide channel, which can radially clamp and axially guide and limit the cable passing through the guide channel.

[0010] Furthermore, the movable component includes a U-shaped block fixedly installed on the back of the welding positioning seat, a horizontal plate fixedly installed on the front side of the U-shaped block, a groove opened on the top right side of the horizontal plate, a first lead screw rotatably installed at the middle position of the horizontal plate, a first ring welding synchronous motor for driving the rotation of the first lead screw fixedly connected to the left side, and a winch rotatably installed on the back of the horizontal plate, with welding wire wound around the outer edge of the winch.

[0011] Furthermore, the wire feeding assembly includes a convex plate that is movably engaged in the groove. A ring is fixedly installed on the top of the convex plate, and two arc-shaped springs are symmetrically installed on the inner wall of the ring. The opposite ends of the two arc-shaped springs are movably engaged with a round rod. Two second springs are sleeved on the outer edge of the round rod, and a C-shaped block is movably sleeved on the top of the round rod through the second springs. Two vertically symmetrical second guide wheels are rotatably installed on the inner side of the C-shaped block. The rotation shaft of one of the second guide wheels is fixedly connected to a wire feeding motor for driving its rotation. The welding wire is led out from the winch and passes through the gap between the two second guide wheels.

[0012] Furthermore, the lifting assembly includes a Z-shaped block, which is threaded onto the outer edge of the first lead screw and can move axially along the horizontal plate as the first lead screw rotates; a second ring-welded synchronous motor is fixedly installed on the top of the Z-shaped block, and the output shaft of the second ring-welded synchronous motor is fixedly connected to the second lead screw; a movable block is threaded onto the outer edge of the second lead screw, and the movable block is movably engaged with the front side of the Z-shaped block and can be adjusted vertically as the second lead screw rotates.

[0013] Furthermore, the heating block and the welding head are both fixedly installed on the front side of the movable block, and can synchronously complete the lateral displacement and vertical lifting adjustment with the movable block; the inside of the guide tube is provided with welding wire extending from the second guide wheel, and the wire outlet of the guide tube faces the welding end of the welding head.

[0014] The beneficial effects of this invention are as follows: 1. This invention utilizes a circumferential uniform welding assembly and a rotatable wire feeding assembly that work together. A ring motor starts, driving the clamping block and guide tube to rotate synchronously. The guide tube causes the welding wire to move in a ring around the wire connection point. Simultaneously, the welding head performs ring heating and welding on the wire connection point. This achieves uniform and stable wire feeding and synchronous ring welding, ensuring precise delivery of the welding wire to the wire connection point. The welding wire and welding head move in a uniform ring around the connection point, achieving uniform ring welding at the wire connection point. This effectively avoids welding defects such as porosity, inclusions, cracks, and uneven welds, thus improving welding quality.

[0015] 2. This invention utilizes a follow-up wire feeding assembly. During annular welding, the C-shaped block can be pulled left and right in the horizontal direction to obtain lateral movement space. The angle can be adjusted by moving the round rod left and right within the annulus to compress the arc spring. This allows for uniform wire feeding even when the welding wire is pulled to different positions, effectively resolving the tensile stress caused by the change in the trajectory of the welding wire during annular welding. This avoids problems such as wire jamming, wire breakage, or uneven wire feeding, ensuring the uniformity and density of the annular weld at the wire guide joint and improving the overall welding quality.

[0016] 3. This invention, through its layered rubbing design and precise adjustment mechanism, adapts to the different rubbing requirements of the cable guide wire and the rubber outer layer, ensuring the density and uniformity of the rubbing. This avoids damage to the guide wire and the rubber outer layer, while also creating a uniform rubbing texture on the surface of the guide wire and a rough surface on the rubber outer layer. This improves the subsequent welding adhesion and the heat shrink tubing adhesion, ensuring the strength and insulation of the cable connection. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a top view of the overall structure of the present invention; Figure 3 This is a schematic diagram of the layered wire rolling assembly structure of the present invention; Figure 4 For the present invention Figure 3 Enlarged schematic diagram of the structure at point A in the middle; Figure 5 This is a schematic diagram of the guiding component structure of the present invention; Figure 6 This is a schematic diagram of the lifting component structure of the present invention; Figure 7 This is a schematic diagram of the structure of the mobile component of the present invention; Figure 8 This is a schematic diagram of the wire feeding assembly structure of the present invention.

[0018] In the diagram: 1. Thread rolling positioning seat; 2. Layered thread rolling assembly; 3. Guide assembly; 4. Moving assembly; 5. Wire feeding assembly; 6. Lifting assembly; 7. Circumferential uniform welding assembly; 21. L-shaped plate; 22. Hydraulic rod; 23. Rectangular plate; 24. Thread rolling guide rail; 25. Lifting block; 26. Long plate; 27. First thread rolling plate; 28. Second thread rolling plate; 31. Inverted U-shaped plate; 32. First arc-shaped block; 33. Second arc-shaped block; 34. Vertical plate; 35. First guide wheel; 41. U-shaped block; 42. 43. Horizontal plate; 44. Groove; 45. First lead screw; 46. First ring welding synchronous motor; 47. Winch; 58. Welding wire; 59. Convex plate; 50. Ring; 51. Arc spring; 52. Round rod; 53. Second spring; 54. C-shaped block; 55. Second guide wheel; 66. Wire feeding motor; 77. Z-shaped block; 68. Second ring welding synchronous motor; 79. Second lead screw; 70. Movable block; 71. Heating block; 72. Ring motor; 73. Clamping block; 74. Guide tube; 75. Welding head. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] like Figure 1 , 2 As shown, it includes a welding positioning seat 1, a layered wire twisting assembly 2 for wire twisting treatment of cable head ends is fixedly installed on the inner side of the welding positioning seat 1, guide assemblies 3 are fixedly installed on both the left and right sides of the layered wire twisting assembly 2, the two guide assemblies 3 are coaxially arranged with the layered wire twisting assembly 2, a moving assembly 4 is fixedly installed on the back of the two guide assemblies 3, a wire feeding assembly 5 is movably arranged on the top of the moving assembly 4, a lifting assembly 6 is fixedly installed on the front side of the wire feeding assembly 5, and a circumferential uniform welding assembly 7 is fixedly installed on the front side of the lifting assembly 6. The circumferential uniform welding assembly 7 includes a heating block 71, a ring motor 72 is fixedly installed at the bottom of the heating block 71, a clamping block 73 is coaxially fixedly connected to the output shaft of the ring motor 72, a guide tube 74 for guidance is fixedly clamped on the inner side of the clamping block 73, a welding head 75 is also fixed at the bottom of the heating block 71, the welding end of the welding head 75 is correspondingly set with the wire outlet of the guide tube 74, and the guide tube 74 can rotate circumferentially around the joint of the cable head to be welded with the ring motor 72; During operation, the heating block 71 is activated to preheat the welding head 75, bringing it to a suitable welding temperature. Simultaneously, the ring motor 72 is activated, driving the clamping block 73 and the guide tube 74 to rotate synchronously. The guide tube 74 drives the welding wire 47 to make a ring motion around the wire joint. The welding head 75 simultaneously performs ring heating and welding on the wire joint. Since the guide tube 74 and the welding head 75 are correspondingly set, and the ring motor 72 drives the welding wire 47 and the welding head 75 to make a uniform ring motion, uniform ring welding at the wire joint can be achieved.

[0021] As a preferred embodiment of the present invention, such as Figure 3 , 4As shown, the layered thread rolling assembly 2 includes an L-shaped plate 21 fixedly installed on the inner wall of the thread rolling positioning seat 1. Two parallel hydraulic rods 22 are fixedly installed on the inner side of the L-shaped plate 21. The telescopic ends of the two hydraulic rods 22 are fixedly connected to a rectangular plate 23. Multiple parallel thread rolling guide rails 24 are fixedly connected to the inner walls of the L-shaped plate 21 and the rectangular plate 23. Each thread rolling guide rail 24 has a lifting block 25 movably sleeved on its outer edge, which can be adjusted along the axial direction of the thread rolling guide rail 24. The lifting blocks on both sides are relatively adjustable. Two sets of symmetrically arranged long plates 26 are fixed together between the blocks 25. A first rubbing plate 27 is embedded in the inner edge of each set of long plates 26, and a second rubbing plate 28 is embedded in the other side of each first rubbing plate 27. The first rubbing plate 27 is made of rubber, and the spacing density of the rubbing strips on its surface is smaller than that of the second rubbing plate 28. It is used to rub the guide wire part at the end of the cable. The second rubbing plate 28 is made of metal, and the spacing density of the rubbing strips on its surface is greater than that of the first rubbing plate 27. It is used to rub the rubber outer layer at the end of the cable. During operation, the lifting block 25 moves up and down along the thread rolling guide rail 24, driving the long plate 26 and the rolling plate to flexibly adjust their positions, ensuring that the rolling plate fully contacts the cable surface. The hydraulic rod 22 can precisely control the extension and retraction force, thereby adjusting the rolling force of the rolling plate on the cable, avoiding problems such as loose thread rolling leading to loose wire connection, or excessive thread rolling causing damage to the wire and rubber outer layer. At the same time, it ensures the thread rolling density and uniformity, so that the wire surface forms a uniform rolling texture, improving the adhesion of subsequent welding. After the rubber outer layer is rolled, a rough surface is formed, thereby enhancing the adhesion with the heat shrink tubing.

[0022] As a preferred embodiment of the present invention, such as Figure 5 As shown, the guide assembly 3 includes an inverted U-shaped plate 31, which is fixedly installed on the top of the thread rolling positioning seat 1. The left and right inner walls of the inverted U-shaped plate 31 are elastically connected to a first arc-shaped block 32 and a second arc-shaped block 33, respectively. Two symmetrical vertical plates 34 are installed through the middle of the first arc-shaped block 32 and the second arc-shaped block 33. A first guide wheel 35 is rotatably installed between each pair of opposite vertical plates 34. The first arc-shaped block 32 and the second arc-shaped block 33 are both made of elastic metal. After they are joined together, they form a circular tubular guide channel coaxial with the layered thread rolling assembly 2. The two first guide wheels 35 are symmetrically distributed in the guide channel, which can radially clamp and axially guide and limit the cable passing through the guide channel. During operation, the two cables to be connected are fed into the guide components 3 on the left and right sides of the equipment respectively. The cables pass through the guide channel formed by the first arc block 32 and the second arc block 33. The first guide wheel 35, which is symmetrical in the upper and lower parts, adheres tightly to the surface of the cable under the elastic force to guide and limit the cable.

[0023] As a preferred embodiment of the present invention, such as Figure 7As shown, the moving component 4 includes a U-shaped block 41 fixedly installed on the back of the welding positioning seat 1. A horizontal plate 42 is fixedly installed on the front side of the U-shaped block 41. A groove 43 is provided on the top right side of the horizontal plate 42. A first lead screw 44 is rotatably installed in the middle of the horizontal plate 42. A first ring welding synchronous motor 45 for driving its rotation is fixedly connected to the left side of the first lead screw 44. A winch 46 is rotatably installed on the back of the horizontal plate 42. Welding wire 47 is wound around the outer edge of the winch 46. During operation, the first ring welding synchronous motor 45 starts, driving the first lead screw 44 to rotate. The rotation of the first lead screw 44 causes the Z-shaped block 61 to move horizontally along the horizontal plate 42, which in turn causes the lifting assembly 6 and the circumferential uniform welding assembly 7 to move horizontally synchronously until the welding head 75 of the circumferential uniform welding assembly 7 is precisely aligned with the joint of the two cable guide wires.

[0024] As a preferred embodiment of the present invention, such as Figure 8 As shown, the wire feeding assembly 5 includes a convex plate 51 that is movably engaged in the groove 43. A ring 52 is fixedly installed on the top of the convex plate 51. Two arc-shaped springs 53 are symmetrically installed on the inner wall of the ring 52. A round rod 54 is movably engaged at the opposite ends of the two arc-shaped springs 53. Two second springs 55 are sleeved on the outer edge of the round rod 54. A C-shaped block 56 is movably sleeved on the top of the round rod 54 through the second springs 55. Two vertically symmetrical second guide wheels 57 are rotatably installed on the inner side of the C-shaped block 56. The rotation shaft of one of the second guide wheels 57 is fixedly connected to a wire feeding motor 58 for driving its rotation. The welding wire 47 is led out from the winch 46 and passes through the gap between the two second guide wheels 57. During operation, the wire feeding motor 58 starts, driving one of the second guide wheels 57 to rotate. The two second guide wheels 57 are in close contact with the welding wire 47. Through the rotation of the second guide wheels 57, the welding wire 47 wound on the winch 46 is fed evenly and stably into the guide tube 74. The guide tube 74 guides the welding wire 47, ensuring that the welding wire 47 is accurately fed to the welding head 75 and the guide wire docking point. During ring welding, the C-shaped block 56 can be pulled left and right in the horizontal direction to obtain lateral movement space. The angle can be adjusted by moving the round rod 54 left and right in the ring 52 to compress the arc spring 53, so that the welding wire 47 can be evenly fed when it is pulled to different positions.

[0025] As a preferred embodiment of the present invention, such as Figure 6 As shown, the lifting assembly 6 includes a Z-shaped block 61, which is threaded onto the outer edge of the first lead screw 44 and can move axially along the horizontal plate 42 as the first lead screw 44 rotates; a second ring-welded synchronous motor 62 is fixedly installed on the top of the Z-shaped block 61, and the output shaft of the second ring-welded synchronous motor 62 is fixedly connected to a second lead screw 63; a movable block 64 is threaded onto the outer edge of the second lead screw 63, and the movable block 64 is movably engaged with the front side of the Z-shaped block 61 and can be adjusted vertically as the second lead screw 63 rotates; During operation, the second ring welding synchronous motor 62 in the lifting assembly 6 starts, driving the second lead screw 63 to rotate. The movable block 64 is threaded onto the second lead screw 63 and is movably engaged in front of the Z-shaped block 61. The rotation of the second lead screw 63 drives the movable block 64 to move up and down, thereby driving the heating block 71, the ring motor 72, the clamping block 73, the guide tube 74, and the welding head 75 to rise and fall synchronously, adjusting the vertical distance between the welding head 75 and the guide wire connection point to ensure accurate welding position.

[0026] Furthermore, the heating block 71 and the welding head 75 are both fixedly installed on the front side of the movable block 64, and can synchronously complete the lateral displacement and vertical lifting adjustment with the movable block 64; the guide tube 74 is provided with a welding wire 47 extending from the second guide wheel 57, and the wire outlet of the guide tube 74 faces the welding end of the welding head 75. During operation, the guide tube 74 and the welding head 75 are set in a corresponding manner, and the ring motor 72 drives the welding wire 47 and the welding head 75 to make a uniform ring motion, which can realize uniform ring welding at the guide wire joint and avoid welding defects such as porosity, inclusions, cracks, and uneven welds.

[0027] Working principle: When using this device, two cables to be connected are fed into the guide components 3 on the left and right sides of the device respectively. The cables pass through the guide channel formed by the first arc block 32 and the second arc block 33. The first guide wheel 35, which is symmetrical in the upper and lower parts, is in close contact with the surface of the cable under the elastic force to guide and limit the cable.

[0028] After the cable is guided and positioned, the two parallel hydraulic rods 22 on the inner side of the L-shaped plate 21 shorten synchronously, pushing the rectangular plate 23 to move towards the L-shaped plate 21 until the first rubbing plate 27 and the second rubbing plate 28 on the two long plates 26 are respectively attached to the corresponding parts of the cable. The first rubbing plate 27, which is made of rubber and has a small surface rubbing density, is precisely attached to the guide wire part of the cable, while the second rubbing plate 28, which is made of metal and has a large surface rubbing density, is attached to the rubber outer layer of the cable, realizing the layered rubbing of the guide wire and the rubber outer layer, adapting to the different rubbing requirements of the two.

[0029] During the rubbing process, the lifting block 25 moves up and down along the rubbing guide rail 24, driving the long plate 26 and the rubbing plate to flexibly adjust their positions, ensuring that the rubbing plate is fully in contact with the cable surface. The hydraulic rod 22 can precisely control the extension and retraction force, thereby adjusting the rubbing force of the rubbing plate on the cable, avoiding problems such as loose rubbing leading to loose wire connection, or excessive rubbing causing damage to the wire and the outer rubber layer. At the same time, it ensures the density and uniformity of rubbing, so that a uniform rubbing texture is formed on the surface of the wire, improving the adhesion of subsequent welding. After rubbing, the outer rubber layer can form a rough surface, thereby enhancing the adhesion with the heat shrink tubing.

[0030] After the wire rolling is completed, the moving component 4 and the lifting component 6 work together to drive the circumferential welding component 7 and the wire feeding component 5 to precisely align the wire-rolled cable guide wires. The hydraulic rod 22 increases its stroke, causing the rectangular plate 23 to move away from the L-shaped plate 21. Then, the first circumferential welding synchronous motor 45 starts, driving the first lead screw 44 to rotate. The rotation of the first lead screw 44 drives the Z-shaped block 61 to move horizontally along the horizontal plate 42, which in turn drives the lifting component 6 and the circumferential welding component 7 to move horizontally synchronously until the welding head 75 of the circumferential welding component 7 is precisely aligned with the connection point of the two cable guide wires.

[0031] Simultaneously, the second ring welding synchronous motor 62 in the lifting assembly 6 starts, driving the second lead screw 63 to rotate. The movable block 64 is threadedly connected to the second lead screw 63 and is movably engaged in front of the Z-shaped block 61. The rotation of the second lead screw 63 drives the movable block 64 to move up and down, thereby driving the heating block 71, the ring motor 72, the clamping block 73, the guide tube 74, and the welding head 75 to rise and fall synchronously, adjusting the vertical distance between the welding head 75 and the guide wire connection point to ensure accurate welding position.

[0032] Before welding, the wire feeding motor 58 is started, driving one of the second guide wheels 57 to rotate. The two second guide wheels 57 are in close contact with the welding wire 47. Through the rotation of the second guide wheels 57, the welding wire 47 wound on the winch 46 is fed into the guide tube 74 at a uniform speed and stably. The guide tube 74 guides the welding wire 47, ensuring that the welding wire 47 is accurately fed to the welding head 75 and the wire guide joint.

[0033] Once the welding position and the welding wire 47 feed are in place, the heating block 71 is activated to preheat the welding head 75, bringing it to a suitable welding temperature. Simultaneously, the ring motor 72 is activated, driving the clamping block 73 and the guide tube 74 to rotate synchronously. The guide tube 74 drives the welding wire 47 to make a ring motion around the wire connection point, and the welding head 75 simultaneously performs ring heating welding on the wire connection point. Because the guide tube 74 and the welding head 75 are correspondingly set, and the ring motor 72 drives the welding wire 47 and the welding head 75 to make a uniform ring motion, uniform ring welding at the wire connection point can be achieved.

[0034] During ring welding, the C-shaped block 56 can be pulled left and right in the horizontal direction to obtain lateral movement space. The angle can be adjusted by moving the round rod 54 left and right within the ring 52 to compress the arc spring 53. This allows the welding wire 47 to be pulled to different positions and still be fed evenly, avoiding welding defects such as porosity, inclusions, cracks, and uneven welds. After welding is completed, the worker pulls the welded cable out of the equipment and then uses a heat shrink sleeve to shrink and insulate the welded part. This completes the workflow.

[0035] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, or similar improvements made within the theoretical and principle scope of the present invention should be included within the protection scope of the present invention.

Claims

1. An automatic wire twisting and welding device for cable heads, comprising a wire twisting and welding positioning seat (1), characterized in that: The inner side of the welding positioning seat (1) is fixedly installed with a layered wire rolling assembly (2) for wire rolling treatment of cable head end. The left and right sides of the layered wire rolling assembly (2) are fixedly installed with guide assemblies (3). The guide assemblies (3) are coaxially arranged with the layered wire rolling assembly (2). The back of the guide assembly (3) is fixedly installed with a moving assembly (4). The top of the moving assembly (4) is movably provided with a wire feeding assembly (5). The front side of the wire feeding assembly (5) is fixedly installed with a lifting assembly (6). The front side of the lifting assembly (6) is fixedly installed with a circumferential uniform welding assembly (7). The circumferential uniform welding assembly (7) includes a heating block (71). A ring motor (72) and a welding head (75) are fixedly installed at the bottom of the heating block (71). A clamping block (73) is coaxially fixedly connected to the output shaft of the ring motor (72). A guide tube (74) for guidance is fixedly clamped on the inner side of the clamping block (73). The welding end of the welding head (75) is correspondingly set with the wire outlet of the guide tube (74), and the guide tube (74) can rotate circumferentially around the joint of the cable head to be welded with the ring motor (72).

2. The automatic wire twisting and welding equipment for cable heads according to claim 1, characterized in that: The layered thread rolling assembly (2) includes an L-shaped plate (21) fixedly installed on the inner wall of the thread rolling positioning seat (1). A hydraulic rod (22) is fixedly installed on the inner side of the L-shaped plate (21). A rectangular plate (23) is fixedly connected to the telescopic ends of the hydraulic rod (22). Parallel thread rolling guide rails (24) are fixedly connected to the inner walls of the L-shaped plate (21) and the rectangular plate (23). A lifting block (25) that can be adjusted along the axial direction of the thread rolling guide rail (24) is movably sleeved on the outer edge of the thread rolling guide rail (24). A long plate (26) is fixedly fixed between the two opposite lifting blocks (25). A first thread rolling plate (27) is embedded in the inner edge of the long plate (26). A second thread rolling plate (28) is embedded in the other side of the first thread rolling plate (27).

3. The automatic wire twisting and welding equipment for cable heads according to claim 2, characterized in that: The first rubbing board (27) is made of rubber, and the spacing density of the rubbing strips on its surface is less than that of the second rubbing board (28), which is used to rub the guide wire part at the end of the cable; the second rubbing board (28) is made of metal, and the spacing density of the rubbing strips on its surface is greater than that of the first rubbing board (27), which is used to rub the rubber outer layer at the end of the cable.

4. The automatic wire twisting and welding equipment for cable heads according to claim 1, characterized in that: The guide assembly (3) includes an inverted U-shaped plate (31), which is fixedly installed on the top of the welding positioning seat (1). The left and right inner walls of the inverted U-shaped plate (31) are elastically connected to a first arc block (32) and a second arc block (33). A vertical plate (34) is installed through the middle of the first arc block (32) and the second arc block (33). Two vertical plates are symmetrically arranged, and a first guide wheel (35) is rotatably installed between each pair of opposite vertical plates.

5. An automatic wire twisting and welding device for cable heads according to claim 4, characterized in that: The first arc block (32) and the second arc block (33) are both made of elastic metal. After they are joined together, they form a circular tubular guide channel coaxial with the layered wire twisting assembly (2). The first guide wheel (35) is symmetrically distributed in the guide channel, which can radially clamp and axially guide and limit the cable passing through the guide channel.

6. The automatic wire twisting and welding equipment for cable heads according to claim 1, characterized in that: The moving component (4) includes a U-shaped block (41) fixedly installed on the back of the welding positioning seat (1). A horizontal plate (42) is fixedly installed on the front side of the U-shaped block (41). A groove (43) is provided on the top right side of the horizontal plate (42). A first lead screw (44) is rotatably installed in the middle of the horizontal plate (42). A first ring welding synchronous motor (45) for driving the rotation of the first lead screw (44) is fixedly connected to the left side. A winch (46) is rotatably installed on the back of the horizontal plate (42). Welding wire (47) is wound around the outer edge of the winch (46).

7. An automatic wire twisting and welding device for cable heads according to claim 1, characterized in that: The wire feeding assembly (5) includes a convex plate (51), which is movably engaged in the groove (43) of the moving assembly (4). A ring (52) is fixedly installed on the top of the convex plate (51), and an arc spring (53) is symmetrically installed on the inner wall of the ring (52). A round rod (54) is movably engaged at the opposite ends of the arc spring (53). A second spring (55) is sleeved on the outer edge of the round rod (54), and a C-shaped block (56) is movably sleeved on the top of the round rod (54) through the second spring (55). Two symmetrical second guide wheels are rotatably installed on the inner side of the C-shaped block (56). The rotating shaft of one of the second guide wheels is fixedly connected to a wire feeding motor (58) for driving its rotation. The welding wire (47) is led out from the winch (46) and passes through the gap between the two second guide wheels.

8. An automatic wire twisting and welding device for cable heads according to claim 1, characterized in that: The lifting assembly (6) includes a Z-shaped block (61), which is threaded onto the outer edge of the first lead screw (44) of the moving assembly (4) and can move axially along the horizontal plate (42) as the first lead screw (44) rotates; a second ring welding synchronous motor (62) is fixedly installed on the top of the Z-shaped block (61), and a second lead screw (63) is fixedly connected to the output shaft of the second ring welding synchronous motor (62). A movable block (64) is threaded onto the outer edge of the second lead screw (63), and the movable block (64) is movably engaged with the front side of the Z-shaped block (61) and can be adjusted vertically as the second lead screw (63) rotates.

9. An automatic wire twisting and welding device for cable heads according to claim 1, characterized in that: The heating block (71) and the welding head (75) are both fixedly installed on the front side of the movable block (64) and can be adjusted horizontally and vertically in sync with the movable block (64); the guide tube (74) is provided with a welding wire (47) extending from the second guide wheel (57), and the wire outlet of the guide tube (74) faces the welding end of the welding head (75).

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