A cable armoring wrapping machine

Abstract

The present application relates to cable armoring technical field, disclose a kind of cable armoring wrapping machine, including machine base, machine base two ends are respectively provided with take-up and pay-off assembly, for clamping and driving cable core moves along its axial direction, still include the wrapping mechanism and extrusion setting mechanism sequentially arranged along the direction of cable core movement;The wrapping mechanism includes gantry fixedly connected with the machine base, rotating cylinder is rotatably supported on the gantry, and the rotating cylinder outer wall is close to the one end of cable core feed-in and is provided with the pay-off assembly for carrying metal band roll, the rotating cylinder outer wall is away from the one end of cable core feed-in and is provided with mounting bracket, and mounting bracket is rotatably connected with the drive roller synchronous rotation with rotating cylinder.The present application is established fixed mechanical transmission chain between rotating cylinder revolution and drive roller autorotation by driven gear along fixed gear ring rolling, so that metal band pay-off linear speed and cable core advancing speed keep constant speed ratio, fundamentally realizes the automatic accurate control of pay-off tension.

Description

Technical Field

[0001] This invention relates to the field of cable armoring technology, specifically a cable armoring wrapping machine. Background Technology

[0002] In the cable manufacturing industry, the armoring process typically involves wrapping the cable core with metal strips or wires in a spiral manner to form a continuous, dense metal protective layer. The core function of this process is to significantly enhance the mechanical strength of the cable, enabling it to effectively withstand tension, compression, impact, and external mechanical damage that may occur during laying, construction, and long-term operation, thereby ensuring the cable's reliability and service life.

[0003] In existing technologies, most wrapping equipment used for the aforementioned armor wrapping can only perform the basic action of simply wrapping the metal strip around the cable. During the unwinding process, to achieve stable tension output, a magnetic powder brake is usually used as a tension regulating element, applying a corresponding braking torque by adjusting its excitation current. However, as the armoring operation continues, the diameter of the metal strip roll gradually decreases due to the continuous unwinding of the strip. Assuming a constant tension setting, according to the torque balance relationship, the braking torque required by the magnetic powder brake should match the real-time roll diameter. If the braking torque remains unchanged, the actual unwinding tension will continuously increase as the roll diameter decreases, easily causing the tension on the strip to exceed the permissible range, leading to quality problems such as uneven winding tightness or even strip breakage. Therefore, operators must frequently adjust the braking force of the magnetic powder brake manually according to changes in the roll diameter during production to maintain relative tension stability. This kind of operation method, which relies on manual experience and repeated adjustments, is not only cumbersome and labor-intensive, but also has a lagging response and insufficient precision in tension control. It is difficult to ensure the consistency of the armor layer winding density and appearance quality, which seriously restricts the improvement of production efficiency and automation level, and urgently needs to be improved. Summary of the Invention

[0004] This invention provides a cable armor wrapping machine, which solves the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A cable armor wrapping machine includes a base, with winding and unwinding assemblies respectively provided at both ends of the base for clamping and driving the cable core to move along its axial direction, and also includes a wrapping mechanism and a compression shaping mechanism arranged sequentially along the moving direction of the cable core.

[0007] The wrapping mechanism includes a gantry frame fixedly connected to a base, a rotating drum for the cable core to pass through which is rotatably supported on the gantry frame, a feeding assembly for carrying the metal strip roll is provided at the end of the outer wall of the rotating drum near the cable core feeding end, a mounting frame is provided at the end of the outer wall of the rotating drum away from the cable core feeding end, a drive roller that rotates synchronously with the rotating drum is rotatably connected to the mounting frame, a positioning assembly for pressing the metal strip tightly against the outer circumference of the drive roller is provided on the side of the mounting frame, the drive roller is configured to rotate on its own when the rotating drum rotates, so as to pull the metal strip out from the feeding assembly and spirally wrap it around the outside of the cable core;

[0008] The extrusion shaping mechanism is used to extrude and shape the metal strip wound around the outside of the cable core.

[0009] As a preferred embodiment of the present invention, a fixed gear ring coaxially arranged with the rotating cylinder is fixed on the gantry frame, and a driven gear meshing with the fixed gear ring is fixed at the end of the drive roller, so that the drive roller rotates around its own axis while revolving with the rotating cylinder. A drive device for driving the rotating cylinder to rotate is provided on the side of the gantry frame near the machine base.

[0010] As a preferred embodiment of the present invention, the mounting bracket has a C-shaped structure, and the positioning component includes a positioning bracket fixedly connected to the mounting bracket. A transverse block is slidably connected to the middle of the positioning bracket. A positioning wheel that cooperates with the driving roller is rotatably mounted on the side of the transverse block near the driving roller. A transverse lead screw is rotatably connected to the side of the positioning bracket, and the transverse block is threadedly connected to the middle of the transverse lead screw.

[0011] As a preferred embodiment of the present invention, the drive roller has a conical structure with multiple positioning grooves on its circumference. The width of the positioning grooves is greater than the width of the metal strip. The positioning roller presses the metal strip into the positioning grooves and makes rolling contact with them.

[0012] As a preferred embodiment of the present invention, the outer periphery of the rotating cylinder is symmetrically provided with two or more sets of the feeding components and corresponding mounting brackets and positioning components. The end of the rotating cylinder near the positioning component is also fixed with a guide bracket. Two parallel guide wheels are rotatably mounted on the guide bracket, and a metal strip passes through and connects the two guide wheels.

[0013] As a preferred embodiment of the present invention, the feeding assembly includes a feeding bracket fixedly connected to the side wall of the rotating cylinder, a tray rotatably connected to the middle of the feeding bracket, a material tray for winding metal strip is placed on the tray, and a clamping plate for clamping the material tray is provided in the middle of the tray.

[0014] As a preferred embodiment of the present invention, the extrusion shaping mechanism includes a mounting back plate fixedly connected to the base, a C-shaped frame is provided on the side of the mounting back plate, mounting seats are symmetrically arranged on both sides of the C-shaped frame, and an extrusion assembly that cooperates with the cable core is provided in the middle of the mounting seat.

[0015] As a preferred embodiment of the present invention, the extrusion assembly includes an extrusion rod slidably connected to the center of the mounting base, an extrusion frame is provided at one end of the extrusion rod near the cable core, an extrusion roller is rotatably connected to the extrusion frame and makes rolling contact with the metal strip on the cable core, an extrusion spring is provided between the extrusion frame and the mounting base, the extrusion spring is used to provide an elastic force to press the extrusion roller against the cable core, and a handle is fixedly connected at one end of the extrusion rod away from the cable core.

[0016] As a preferred embodiment of the present invention, the mounting base is slidably connected to the C-shaped frame, and multiple C-shaped frames are evenly distributed on the side of the mounting back plate. Multiple limiting holes are provided on the C-shaped frames, and a guide hole is provided at the end of the mounting base. A positioning rod is provided at the end of the grip rod. When the mounting base moves to the point where its guide hole is aligned with a certain limiting hole, the positioning rod is simultaneously inserted into the guide hole and the limiting hole.

[0017] As a preferred embodiment of the present invention, the winding and unwinding assembly includes a support leg fixedly connected to the base, and a clamping head is provided at the end of the support leg away from the base. The clamping head is detachably connected to the reel, and the cable core is wound around the outside of the reel.

[0018] The present invention has the following advantages:

[0019] 1. Automatic and constant unloading tension significantly improves product quality: The fixed mechanical transmission chain (driven gear rolling along a fixed gear ring) established between the revolution of the rotating drum and the rotation of the drive roller ensures that the unloading linear speed of the metal strip and the traveling speed of the cable core maintain a constant speed ratio. This fundamentally eliminates the drawback of the traditional magnetic powder brake requiring frequent manual adjustment, and realizes automatic, precise, and stable control of the unloading tension, ensuring a high degree of consistency in the pitch and tightness of the armor layer.

[0020] 2. Convenient and reliable tension adjustment, good process adaptability: The drive roller adopts a conical structure and has multiple positioning grooves at different diameters. Operators only need to change the metal strip to different positioning grooves to easily change the actual unwinding radius, thereby adjusting the unwinding linear speed and winding tension, realizing multiple tension options. Moreover, the adjustment process does not require any change of transmission parameters. The structure is simple and the operation is intuitive.

[0021] 3. Smooth metal strip guidance and better winding quality: The inclined surface of the tapered drive roller provides a natural deflection path for the metal strip, so that the metal strip begins to gradually turn towards the cable core axis when it leaves the drive roller. Combined with the precise positioning of the guide wheel, the metal strip can enter the spiral winding in a smoother and more natural manner, effectively reducing the twisting, folding and stress concentration of the strip, and improving the appearance quality of the winding.

[0022] 4. Elastic extrusion shaping, dense and strong armor layer: Multiple sets of radially evenly distributed elastic extrusion rollers are set downstream of the wrapping. The compression springs provide continuous and uniform radial extrusion force, which can effectively compact the gaps between the metal strip layers after winding, so that the armor layer is tightly attached to the surface of the cable core, greatly improving the density, roundness and resistance to mechanical damage of the armor layer.

[0023] 5. High structural integration and convenient operation and maintenance: The whole machine adopts a modular layout, with the wrapping and shaping functions integrated on the same base, resulting in a compact structure; the feeding component adopts a quick clamping structure, making material replacement convenient; tension adjustment, extrusion roller opening and closing, and other operations are all designed with manual quick adjustment mechanisms, allowing for operation switching and daily maintenance without the need for complex tools, effectively reducing the labor intensity of operators and improving production efficiency. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of a cable armor wrapping machine.

[0026] Figure 2 This is a front view of a cable armor wrapping machine.

[0027] Figure 3 This is a schematic diagram of the winding and unwinding assembly in a cable armor wrapping machine.

[0028] Figure 4 This is a schematic diagram of the extrusion and shaping mechanism in a cable armor wrapping machine.

[0029] Figure 5 This is a schematic diagram of the C-shaped frame in a cable armor wrapping machine when it is open.

[0030] Figure 6 This is a schematic diagram of the extrusion assembly in a cable armor wrapping machine.

[0031] Figure 7This is a schematic diagram of the wrapping mechanism in a cable armor wrapping machine.

[0032] Figure 8 This is a front view of the wrapping mechanism in a cable armor wrapping machine.

[0033] Figure 9 This is a schematic diagram of the drive roller in a cable armor wrapping machine.

[0034] Figure 10 This is a schematic diagram of the positioning component in a cable armor wrapping machine.

[0035] Figure 11 This is a schematic diagram of the feeding assembly in a cable armor wrapping machine.

[0036] In the diagram: 1. Base; 2. Unwinding / rewinding assembly; 3. Cable core; 4. Metal strip; 5. Wrapping mechanism; 6. Extrusion and shaping mechanism; 7. Support leg; 8. Clamping head; 9. Cable reel; 10. Mounting back plate; 11. C-frame; 12. Mounting base; 13. Extrusion assembly; 14. Limiting hole; 15. Extrusion rod; 16. Handle; 17. Positioning rod; 18. Guide hole; 19. Extrusion spring; 20. Extrusion frame; 21. Extrusion roller; 22. Gantry frame; 23. Drive unit; 24. Rotary cylinder; 25. Feeding assembly; 26. Drive roller; 27. Driven gear; 28. Fixed gear ring; 29. ​​Mounting bracket; 30. Positioning assembly; 31. Guide bracket; 32. Guide wheel; 33. Positioning bracket; 34. Transverse lead screw; 35. Transverse block; 36. Positioning wheel; 37. Positioning groove; 38. Feeding bracket; 39. Pallet; 40. Clamping plate; 41. Material tray. Detailed Implementation

[0037] 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.

[0038] In one embodiment, see Figure 1 and Figure 2 A cable armor wrapping machine mainly includes: a base 1, a winding and unwinding assembly 2, a wrapping mechanism 5, and an extrusion and shaping mechanism 6.

[0039] The base 1 is welded from I-beams, possessing sufficient strength and rigidity to provide a stable mounting foundation for all working components. Extending longitudinally, the base 1 has a set of take-up / unwinding assemblies 2 at each end, used to support the cable core 3 to be armored and the already armored finished cable, respectively, and to collaboratively drive the cable core 3 to move at a uniform speed along its axial direction during operation. Between the two sets of take-up / unwinding assemblies 2, along the direction of travel of the cable core 3 (from left to right in the figure), a wrapping mechanism 5 and a compression shaping mechanism 6 are sequentially fixedly installed, with the wrapping mechanism 5 located closer to the side where the cable core enters, and the compression shaping mechanism 6 located downstream of it.

[0040] In one instance of this embodiment, please refer to Figures 7-11 The wrapping mechanism 5 is used to evenly wrap the metal strip 4 around the outer circumference of the cable core 3 in a spiral shape.

[0041] The wrapping mechanism 5 includes a gantry frame 22 bolted to the base 1. The gantry frame 22 is welded from structural steel, forming a portal frame structure with ample stability and load-bearing capacity. A hollow rotating cylinder 24 is rotatably supported in the middle of the crossbeam of the gantry frame 22 by two oppositely arranged tapered roller bearings. The inner diameter of the through-hole of the rotating cylinder 24 is larger than the outer diameter of the largest cable core 3 to be processed, ensuring that the cable core 3 can pass smoothly through it. The axial ends of the rotating cylinder 24 are rotatably supported by the gantry frames 22 located on the left and right sides, forming a stable simply supported beam structure.

[0042] On the outer circumferential surface of the rotating cylinder 24, near the feed end of the cable core 3 (left end in the figure), two sets of feeding assemblies 25 are uniformly welded and fixed along the circumferential direction. Each feeding assembly 25 includes a feeding bracket 38 fixedly connected to the outer wall of the rotating cylinder 24. A circular tray 39 is rotatably mounted on the middle of the horizontal section of the feeding bracket 38 via a deep groove ball bearing. The tray 39 is used to place the material tray 41 wound with metal strip 4. A screw is vertically welded to the middle of the tray 39, and a clamping plate 40 is threaded onto the screw. During loading, the material tray 41 is fitted onto the screw and placed on the tray 39. Tightening the clamping plate 40 will firmly press the material tray 41 onto the tray 39, effectively preventing it from loosening or axially shifting during high-speed rotation.

[0043] On the outer circumferential surface of the rotating cylinder 24, away from the feed end (right end in the figure), a set of mounting brackets 29 is welded and fixed to each set of feeding components 25. The mounting bracket 29 has a C-shaped opening structure, and a drive roller 26 is rotatably supported between its two side walls by bearings. The drive roller 26 has a conical structure, with its large-diameter end close to the center of the rotating cylinder 24 and its small-diameter end away from the rotating cylinder 24. On the conical outer circumferential surface of the drive roller 26, multiple positioning grooves 37 are evenly opened along its axial direction. In this embodiment, 3 to 5 grooves are used as an example. The width of the positioning grooves 37 is slightly larger than the width of the metal strip 4, and the depth is about half the thickness of the metal strip 4, used to accommodate and guide metal strips 4 of different specifications.

[0044] A driven gear 27 is fixedly mounted on one end of the drive roller 26 near the center of the rotating drum 24 via a flat key. Correspondingly, a fixed gear ring 28 is fixedly mounted on the left side wall of the right gantry 22 via bolts, and the fixed gear ring 28 is coaxially arranged with the rotating drum 24. The driven gear 27 and the fixed gear ring 28 are constantly meshed. Thus, when the rotating drum 24 rotates, the mounting frame 29 and the drive roller 26 revolve around the axis of the cable core 3 with the rotating drum 24. At the same time, the driven gear 27 drives the drive roller 26 to rotate around its own axis by rolling engagement with the fixed gear ring 28, thereby achieving active traction of the metal strip 4.

[0045] The conical structure of the drive roller 26 has two beneficial effects: First, because the radius varies at different axial positions on the conical surface, the outer circumferential linear velocity at different positioning slots 37 differs at the same rotational speed. Operators can place the metal strip 4 in different positioning slots 37 according to process requirements, thus fine-tuning the actual unwinding linear speed of the metal strip 4 and achieving multi-level adjustable winding tension. Second, the conical surface itself has a guiding effect. As the metal strip 4 travels along the conical surface after being released from the material tray 41, its direction gradually deflects towards the axis of the cable core 3, allowing the metal strip 4 to enter the spiral winding trajectory more smoothly and naturally, reducing strip twisting and stress concentration.

[0046] A drive unit 23 is bolted to the lower part of the left gantry 22. The drive unit 23 consists of a servo motor and a planetary reducer, with a drive gear fixedly mounted on the output shaft of the reducer. A large gear ring is fixedly mounted on the outer wall of the left end of the rotating drum 24 via a flat key, and the drive gear meshes with the large gear ring. By precisely adjusting the speed of the servo motor through the control system, stepless control of the rotation speed of the rotating drum 24 can be achieved, thereby changing the winding pitch of the metal strip 4 to meet the armoring process requirements of cables of different specifications.

[0047] A positioning assembly 30 is fixedly installed on the side wall of each mounting bracket 29 to reliably press the traveling metal strip 4 into the positioning groove 37 on the outer circumferential surface of the drive roller 26, establishing a stable frictional traction relationship. The positioning assembly 30 includes a positioning bracket 33 fixedly welded to the side wall of the mounting bracket 29. The positioning bracket 33 is U-shaped, with its opening facing the drive roller 26, and is arranged slightly inclined along the radial direction of the drive roller 26 to maintain parallelism with the conical surface. A transverse block 35 is slidably installed in the middle of the positioning bracket 33. A positioning wheel 36 is rotatably mounted on the side of the transverse block 35 near the drive roller 26 via a bearing. The wheel surface of the positioning wheel 36 is embedded in the positioning groove 37, pressing the metal strip 4 tightly against the bottom of the groove, and passively rotating as the metal strip 4 moves during operation. The outer circumferential surface of the positioning wheel 36 is preferably covered with a rubber layer or a polyurethane layer to increase friction and prevent scratching the surface of the metal strip 4.

[0048] To allow for flexible adjustment of the position of the positioning wheel 36, a transverse sliding screw 34 is rotatably mounted on the middle of the side wall of the positioning bracket 33 via a bearing. The transverse sliding screw 34 is connected to the threaded hole in the middle of the transverse sliding block 35. Rotating the transverse sliding screw 34 drives the transverse sliding block 35 to reciprocate along the guide groove of the positioning bracket 33, thereby causing the positioning wheel 36 to switch between different positioning grooves 37 or adjust its pressure on the metal strip 4. Because the surface of the positioning wheel 36 has a rubber layer or a polyurethane layer, it can deform slightly during movement, thus transferring between different positioning grooves 37.

[0049] On the right end face of the rotating drum 24, a guide bracket 31 is welded and fixed to each set of feeding components 25. Two parallel guide wheels 32 are rotatably mounted on the guide bracket 31 via pins. The gap between the two guide wheels 32 is slightly larger than the thickness of the metal strip 4. The metal strip 4, pulled from between the drive roller 26 and the positioning wheel 36, passes through the gap between the two guide wheels 32 and then winds onto the surface of the cable core 3. The guide wheels 32 serve to finally position and flatten the metal strip 4, ensuring that it enters the winding and covering area in a stable and flat manner.

[0050] In one instance of this embodiment, please refer to Figures 4-6 The extrusion and shaping mechanism 6 is located downstream of the wrapping mechanism 5. It is used to extrude and shape the metal strip 4 that has been wrapped around the outside of the cable core 3 to eliminate the wrapping gap and improve the density of the armor layer and its fit with the cable core.

[0051] The extrusion and shaping mechanism 6 includes a mounting back plate 10 that is bolted to the base 1. The mounting back plate 10 is a rectangular thick steel plate, preferably 20 to 30 mm thick, with sufficient rigidity. On the front side of the mounting back plate 10, three sets of C-shaped frames 11 are uniformly welded along the moving direction of the cable core 3. Each set consists of two C-shaped frames 11 and is arranged symmetrically from left to right. The openings of the C-shaped frames 11 face forward (operating side).

[0052] Each C-shaped frame 11 has a mounting base 12 slidably mounted on its upper and lower side arms. A row of multiple limiting holes 14 are evenly spaced along the length of the side arm of the C-shaped frame 11, and a guide hole 18 is correspondingly provided at the end of the mounting base 12. The mounting base 12 can move to different positions along the side arm of the C-shaped frame 11. When the guide hole 18 aligns with a certain limiting hole 14, it can be locked by a pin or positioning rod 17.

[0053] Each mounting base 12 is equipped with a set of extrusion assemblies 13 at its center for applying radial extrusion force to the armor layer. The extrusion assembly 13 includes an extrusion rod 15 slidably passing through the center of the mounting base 12, with the axis of the extrusion rod 15 pointing towards the center of the cable core 3. An extrusion frame 20 is fixedly connected to one end of the extrusion rod 15 near the cable core 3. The extrusion frame 20 has a U-shaped opening structure, and an extrusion roller 21 is rotatably mounted inside it via bearings. The surface of the extrusion roller 21 is also covered with a rubber layer of 5 to 10 mm thickness, which provides appropriate friction and effectively prevents damage to the surface of the metal strip 4 during the extrusion process.

[0054] A compression spring 19 is fitted onto the compression rod 15. One end of the compression spring 19 abuts against the outer wall of the compression frame 20, and the other end abuts against the inner wall of the mounting base 12. In its natural state, the compression spring 19 is in a compressed and energy-storing state, continuously providing a pre-tightening force to elastically press the compression roller 21 against the cable core 3. A handle 16 is also welded to the end of the compression rod 15 away from the cable core 3, allowing the operator to manually pull out the compression rod 15 for operations such as threading and adjustment. A positioning rod 17 is provided at the end of the handle 16. The positioning rod 17 is inserted into the guide hole 18 and the corresponding limiting hole 14, locking the relative positions of the mounting base 12 and the C-shaped frame 11.

[0055] In one instance of this embodiment, please refer to Figure 1 and Figure 3 Two sets of take-up and unwinding assemblies 2 are respectively located at both ends of the base 1, and have the same structure.

[0056] The winding and unwinding assembly 2 includes a support leg 7 bolted to the base 1, which is welded from square steel. A clamping head 8 is rotatably mounted on the upper end of the support leg 7 via a bearing seat. The clamping head 8 preferably employs a three-jaw self-centering chuck structure, capable of automatic centering and reliably clamping coils 9 of different diameters, offering good versatility. Before operation, the coil 9 with the cable core 3 to be armored is clamped onto the clamping head 8 of the left winding and unwinding assembly 2, and the empty coil 9 is clamped onto the clamping head 8 of the right winding and unwinding assembly 2. The right coil 9 is used to wind up the finished armored cable. Each winding and unwinding assembly 2 is also equipped with an independent servo motor (not shown in the figure), connected to the rotating shaft of the clamping head 8 via a reducer to precisely control the winding and unwinding speed and tension of the cable core 3.

[0057] The following describes in detail the working process of the cable armor wrapping machine in this embodiment, based on the above structure.

[0058] I. Preparatory Work

[0059] Step 1: Adjust the extrusion and shaping mechanism 6 to the open position.

[0060] The operator holds the levers 16 of each extrusion assembly 13 and pulls them away from the center of the C-frame 11, causing the extrusion rods 15 to retract the extrusion frames 20 and extrusion rollers 21 outwards. When the guide holes 18 on the mounting base 12 are misaligned with the positioning holes on the C-frame 11, the operator releases the levers 16, the positioning rods 17 press against the outer wall of the C-frame 11, and the two extrusion rollers 21 separate, providing sufficient space for the cable core 3 to be inserted.

[0061] Step 2: Thread the cable core 3.

[0062] The cable core 3 to be armored is pulled out from the reel 9 of the left take-up and unwinding assembly 2, passes through the hollow inner cavity of the rotating cylinder 24 from left to right, and continues to be pulled to the right, so that it passes through the central area of ​​each C-shaped frame 11 of the compression and shaping mechanism 6, and finally the free end of the cable core is fixedly clamped on the empty reel 9 of the right take-up and unwinding assembly 2.

[0063] Step 3: Load the metal strip 4 material tray 41.

[0064] The material trays 41 with the metal strip 4 wound on them are placed one by one on the trays 39 of each feeding component 25, so that the center hole of the material tray 41 is fitted into the screw, and then the clamping plate 40 is tightened to firmly press the material trays 41.

[0065] Step 4: Thread the metal strip 4.

[0066] Pull the free end of the metal strip 4 from the material tray 41. Select a suitable positioning groove 37 on the drive roller 26 according to the required winding tension. Embed the metal strip 4 into the selected positioning groove 37. Then rotate the transverse lead screw 34, driving the transverse block 35 to move the positioning wheel 36, which presses the metal strip 4 tightly against the bottom of the positioning groove 37. Next, lead the end of the metal strip 4 out from between the drive roller 26 and the positioning wheel 36, pass it through the gap between the two guide wheels 32 on the guide bracket 31, and finally pre-fix the end of the metal strip 4 to the starting position on the outer surface of the cable core 3 by welding, tape bonding, or fixing with a clamp.

[0067] Step 5: Reset the extrusion and shaping mechanism 6.

[0068] Pull the lever 16 outward to disengage the positioning rod 17 from the C-frame 11, thus unlocking the mounting base 12. Slide each mounting base 12 along the C-frame 11 to the working position, aligning each set of extrusion rollers 21 with the cable core 3. Release the lever 16; the positioning rod 17 simultaneously inserts into the limiting hole 14 and the guide hole 18 to complete the positioning. Under the elastic force of the extrusion spring 19, the extrusion rollers 21 automatically and elastically press against the outer circumference of the cable core 3 (and the subsequently wound metal strip 4). By finely adjusting the position of the mounting base 12 along the C-frame 11, multiple sets of extrusion rollers 21 can be evenly distributed along the cable core axis, ensuring a reasonable extrusion coverage area.

[0069] II. Start-up and Armor Wrapping

[0070] Step 6: Start the device.

[0071] The servo motors of the drive unit 23 and the take-up / unwind assembly 2 are synchronously started by the control system. The drive unit 23 drives the rotating drum 24 to rotate at a set speed through a reducer and gear transmission; the take-up / unwind assembly 2 drives the cable core 3 to move uniformly from left to right along the axial direction at a matching linear speed.

[0072] Step 7: Wrapping the bag around the package.

[0073] The rotation of the rotating drum 24 causes the feeding assembly 25, mounting frame 29, drive roller 26, and positioning assembly 30 mounted on it to revolve around the axis of the cable core 3. Simultaneously, the driven gear 27 mounted at the end of the drive roller 26 rolls along the tooth surface of the fixed gear ring 28, thereby driving the drive roller 26 to rotate around its own axis. Under the pressure of the positioning wheel 36, there is sufficient static friction between the metal strip 4 and the positioning groove 37 of the drive roller 26, and the rotation of the drive roller 26 continuously and uniformly pulls the metal strip 4 out of the material tray 41.

[0074] Step 8: Spiral winding.

[0075] As the revolution of the rotating drum 24 and the axial linear motion of the cable core 3 are superimposed, the metal strip 4 is uniformly wound around the outer surface of the cable core 3 in a continuous spiral shape according to the preset pitch. Since a fixed transmission ratio is established between the rotational speed of the drive roller 26 and the revolutional speed of the rotating drum 24 through the tooth ratio of the driven gear 27 and the fixed gear ring 28, the proportional relationship between the linear speed of the metal strip 4 and the travel speed of the cable core remains constant, realizing automatic and stable control of the winding tension without manual intervention.

[0076] Step 9: Continuous operation and material changeover.

[0077] When the metal strip 4 on a material tray 41 is about to run out, the equipment can be paused. The operator releases the clamping tray 40, removes the empty material tray 41, and replaces it with a new, fully wound material tray 41. Then, the metal strip 4 threading steps are repeated to resume production. If the process requires the armor layer to consist of multiple layers of metal strip 4, multiple sets of feeding components 25 on the circumference can be used simultaneously for synchronous multi-layer winding, with each layer of metal strip 4 wrapped sequentially at a certain angle in space.

[0078] III. Extrusion Shaping and Winding

[0079] Step 10: Extrusion shaping.

[0080] The wound metal strip 4 layers continue to move to the right along with the cable core 3, entering the working area of ​​the extrusion and shaping mechanism 6. Six extrusion rollers 21 on three sets of C-shaped frames 11, driven by the elastic force of their respective extrusion springs 19, simultaneously apply uniform extrusion force to the metal strip 4 armor layer from different radial directions. This extrusion force compacts the tiny gaps between the metal strip 4 layers, ensuring a tight fit between the metal strip 4 and the surface of the cable core 3, effectively improving the roundness, density, and overall mechanical strength of the armor layer.

[0081] Step 11: Rewind the finished product.

[0082] After being extruded and shaped, the armored cable passes through the extrusion and shaping mechanism 6 and continues to the right to reach the right-side take-up and unwinding assembly 2, where it is orderly wound onto the side reel 9. When the armoring operation of the entire cable is completed, all drive devices 23 are stopped, and the finished reel 9 is removed from the clamping head 8, thus completing a complete armoring production cycle.

[0083] This invention provides a cable armor wrapping machine. A fixed mechanical transmission chain is established between the revolution of the rotating drum 24 and the rotation of the drive roller 26 via a driven gear 27 rolling along a fixed gear ring 28. This maintains a constant speed ratio between the unwinding linear speed of the metal strip 4 and the traveling speed of the cable core 3, fundamentally achieving automatic and precise control of the unwinding tension. Frequent manual adjustment of the magnetic powder braking force is unnecessary, significantly improving the consistency of armor pitch and tightness. The drive roller 26 adopts a conical structure with multiple positioning grooves 37. Switching between these grooves allows for convenient changes to the unwinding radius, enabling multiple tension levels to be selected. The adjustment is intuitive and reliable, and the conical surface provides a natural deflection for the metal strip 4, resulting in smoother winding. Downstream, multiple sets of elastic extrusion rollers 21 continuously compact the armor layer, eliminating gaps, improving density, and ensuring uniform shaping. The machine features an integrated structure, convenient operation, effectively reducing labor intensity and improving production efficiency.

[0084] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

Claims

1. A cable armor wrapping machine, comprising a base, with winding and unwinding assemblies respectively provided at both ends of the base for clamping and driving the cable core to move along its axial direction, characterized in that, It also includes a wrapping mechanism and an extrusion shaping mechanism arranged sequentially along the moving direction of the cable core; The wrapping mechanism includes a gantry frame fixedly connected to a base, a rotating drum for the cable core to pass through which is rotatably supported on the gantry frame, a feeding assembly for carrying the metal strip roll is provided at the end of the outer wall of the rotating drum near the cable core feeding end, a mounting frame is provided at the end of the outer wall of the rotating drum away from the cable core feeding end, a drive roller that rotates synchronously with the rotating drum is rotatably connected to the mounting frame, a positioning assembly for pressing the metal strip tightly against the outer circumference of the drive roller is provided on the side of the mounting frame, the drive roller is configured to rotate on its own when the rotating drum rotates, so as to pull the metal strip out from the feeding assembly and spirally wrap it around the outside of the cable core; The extrusion and shaping mechanism is used to extrude and shape the metal strip wound around the outside of the cable core; A fixed gear ring coaxially arranged with the rotating cylinder is fixed on the gantry frame. A driven gear meshing with the fixed gear ring is fixed at the end of the drive roller, so that the drive roller rotates around its own axis while revolving with the rotating cylinder. A drive device for driving the rotating cylinder is provided on the side of the gantry frame near the machine base. The mounting frame has a C-shaped structure. The positioning assembly includes a positioning bracket fixedly connected to the mounting frame. A transverse block is slidably connected to the middle of the positioning bracket. A positioning wheel that cooperates with the drive roller is rotatably mounted on the side of the transverse block near the drive roller. A transverse lead screw is rotatably connected to the side of the positioning bracket. The transverse block is threadedly connected to the middle of the transverse lead screw.

2. The cable armor wrapping machine according to claim 1, characterized in that, The drive roller has a conical structure with multiple positioning grooves on its circumference. The width of the positioning grooves is greater than the width of the metal strip. The positioning roller presses the metal strip into the positioning grooves and makes rolling contact with them.

3. The cable armor wrapping machine according to claim 1, characterized in that, Two or more sets of feeding components and corresponding mounting brackets and positioning components are symmetrically arranged on the outer periphery of the rotating cylinder. A guide bracket is also fixed at one end of the rotating cylinder near the positioning component. Two parallel guide wheels are rotatably mounted on the guide bracket, and a metal strip passes through and connects the two guide wheels.

4. A cable armor wrapping machine according to claim 1, characterized in that, The feeding assembly includes a feeding bracket fixedly connected to the side wall of the rotating cylinder. A tray is rotatably connected to the middle of the feeding bracket. A material tray for winding metal strip is placed on the tray. A clamping plate for clamping the material tray is provided in the middle of the tray.

5. A cable armor wrapping machine according to claim 1, characterized in that, The extrusion shaping mechanism includes a mounting back plate fixedly connected to the base, a C-shaped frame on the side of the mounting back plate, mounting seats symmetrically arranged on both sides of the C-shaped frame, and an extrusion assembly that mates with the cable core in the middle of the mounting seat.

6. A cable armor wrapping machine according to claim 5, characterized in that, The extrusion assembly includes an extrusion rod slidably connected to the center of the mounting base. An extrusion frame is provided at one end of the extrusion rod near the cable core. An extrusion roller that rolls in contact with the metal strip on the cable core is rotatably connected to the extrusion frame. An extrusion spring is provided between the extrusion frame and the mounting base. The extrusion spring is used to provide an elastic force to press the extrusion roller against the cable core. A handle is fixedly connected to one end of the extrusion rod away from the cable core.

7. A cable armor wrapping machine according to claim 6, characterized in that, The mounting base is slidably connected to the C-shaped frame. Multiple C-shaped frames are evenly distributed on the side of the mounting back plate. Multiple limiting holes are provided on the C-shaped frames. A guide hole is provided at the end of the mounting base. A positioning rod is provided at the end of the grip rod. When the mounting base moves to the point where its guide hole is aligned with a certain limiting hole, the positioning rod is simultaneously inserted into the guide hole and the limiting hole.

8. A cable armor wrapping machine according to claim 1, characterized in that, The take-up and unwind assembly includes a support leg fixedly connected to the base. A clamping head is provided at the end of the support leg away from the base. The clamping head is detachably connected to the spool, and the cable core is wound around the outside of the spool.

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