Tool for bending large-diameter cable and working method thereof

Abstract

The invention relates to a tool for bending a large-diameter cable and a working method thereof.The tool for bending the large-diameter cable is characterized in that the tool for bending the large-diameter cable comprises a machine box and a telescopic plate which is connected to the bottom of the machine box and can do telescopic motion relative to the machine box, and two sets of adjusting supports are symmetrically installed at the free end of the telescopic plate in a hinged mode; the adjusting support is provided with two groups of compression rollers used for abutting against a cable, the case is rotatably connected with a bending block matched with the two compression rollers to abut against the cable, the bending block is arranged on the symmetric center line of the two compression rollers, and the bending block and the two compression rollers abut against the two sides of the cable. The two sets of adjusting supports are driven by a third driving mechanism arranged at the free end of the telescopic plate to swing so as to gradually reduce the included angle between the adjusting supports and the telescopic plate. The tool for bending the large-diameter cable is reasonable in design, the cable can be bent conveniently and efficiently, and the bending angle can be adjusted.

Description

Technical Field

[0001] This invention relates to an electrical tool, and more specifically to a tool for bending large-diameter cables. Background Technology

[0002] A hydraulic cable bending tool is disclosed in patent publication number CN212168807U. The device uses a base as a support foundation, and the ejector assembly (including a manual hydraulic actuator and an ejector rod) is fixed on the base. The cable fixing assembly, through the structure of "fixed block + base plate + rotatable top plate", confines the cable to the positioning hole area between the top plate and the base plate. The guide assembly (guide shaft inserted into the positioning hole, guide block sleeved on the shaft and rotatable) provides a bending path guide for the cable. The hydraulic actuator drives the ejector rod to reciprocate, and the bending block (with an arc groove) fixedly connected to the ejector rod is ejected with the ejector rod. The cable in the arc groove is pushed to fit the guide block, and finally bending deformation is achieved. The bending angle of the cable can be changed by adjusting the position of the positioning hole into which the guide block is inserted.

[0003] However, the existing technology has the following shortcomings: it relies on manual rotation of the hydraulic handle to drive the ejector rod, and the bending accuracy depends entirely on the operator's experience. The use of a manual hydraulic actuator may lead to hydraulic oil leakage problems after long-term use, affecting the stability of operation; it has insufficient bending capacity for large cross-section (such as 70 square meters or more) and high-hardness armored cables, and the ejection force is easily limited; it cannot adjust the height of the bending block according to different diameter cables to avoid eccentric pressure. Summary of the Invention

[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a tool for bending large-diameter cables. The tool for bending large-diameter cables is reasonably designed and can conveniently and efficiently bend the cable, and the bending angle can be adjusted.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: The present invention relates to a tool for bending large-diameter cables, characterized in that it includes a housing and a telescopic plate connected to the bottom of the housing and capable of telescopic movement relative to the housing. Two sets of adjusting brackets are symmetrically hinged on the free end of the telescopic plate, and two sets of pressure rollers for pressing against the cable are installed on the adjusting brackets. A bending block that cooperates with the two pressure rollers to press against the cable is rotatably connected to the housing. The bending block is located on the symmetrical center line of the two pressure rollers, and the bending block and the two pressure rollers press against both sides of the cable. The two sets of adjusting brackets are driven to swing by a third driving mechanism located at the free end of the telescopic plate to gradually reduce the angle between the adjusting bracket and the telescopic plate.

[0006] Furthermore, the aforementioned third drive mechanism includes a worm gear driven to rotate by a third motor. The inner end of the adjusting bracket is provided with a worm wheel that can mesh with the worm gear. Under the drive of the third motor, the worm gear is driven to rotate, which in turn drives the worm wheel and the adjusting bracket to swing around the hinge axis.

[0007] Furthermore, a through groove is opened in the middle of the free end of the telescopic plate along the horizontal direction, so that the telescopic plate forms two plates with upper and lower spacing at the free end. Lugs are symmetrically arranged on both sides of the two plates. The lugs are provided with through holes. The adjusting bracket is a long strip plate. The inner end of the adjusting bracket is inserted between the upper and lower lugs. The inner end of the adjusting bracket is provided with a corresponding hole. The through hole and the hole are coaxially stacked and a hinge shaft is installed through it. The worm gear is provided on the peripheral side of the adjusting bracket coaxial with the hole.

[0008] Furthermore, the aforementioned worm gear is rotatably installed in the through groove, and the third motor is fixedly installed on the free ends of the upper and lower plates, with the shaft of the third motor being coaxially and fixedly connected to the worm gear.

[0009] Furthermore, the aforementioned adjusting bracket is provided with an elongated groove, the pressure roller is arranged perpendicularly to the adjusting bracket, and the lower part of the pressure roller is provided with a screw that can pass through the elongated groove. The screw is locked by a nut below the adjusting bracket.

[0010] Furthermore, the bottom of the aforementioned chassis is provided with a guide groove for limiting the telescopic movement of the telescopic plate, and a first gear driven to rotate by a first motor is provided on the side of the guide groove inside the chassis, and a rack that can mesh with the first gear for transmission is provided on the telescopic plate.

[0011] Furthermore, the aforementioned chassis is equipped with a second drive mechanism that drives the bending block to rotate. The second drive mechanism includes a driving gear and a driven gear that mesh with each other and are installed inside the chassis. The driven gear is connected to the rotating shaft, and the bending block is connected to the rotating shaft and can be adjusted in position on the rotating shaft.

[0012] Furthermore, the aforementioned rotating shaft includes a fixed rod, a moving rod, a locking nut, and a spring. The driven gear is located on the lower end of the fixed rod. The upper part of the fixed rod is provided with a threaded rod, a circular boss, and a limiting strip. The end of the limiting strip is connected to the lower surface of the circular boss. The bending block is located on the moving rod, which has a sleeve structure. A retaining ring is provided on the top of the moving rod. The threaded rod passes through the sleeve-shaped moving rod. The lower end face of the spring contacts the upper surface of the circular boss, and the upper end face of the spring contacts the retaining ring. The spring is sleeved on the outer periphery of the threaded rod. The outer periphery of the moving rod is fixed to the center of the bending block. The inner periphery of the moving rod is provided with a groove that mates with the limiting strip. The engagement of the limiting strip and the groove allows the kinetic energy to be transmitted sequentially through the driven gear, the fixed rod, the limiting strip, and the groove to the moving rod, thereby driving the bending block to rotate together. The locking nut is threadedly connected to the threaded rod and is used to axially limit the position of the moving rod.

[0013] Furthermore, it also includes a rotation angle sensor, which comprises a main sensor and an auxiliary sensor; The main sensor is installed at the rotatable connection between the adjusting bracket and the telescopic plate, and is used to detect the included angle between the adjusting bracket and the telescopic plate. The auxiliary sensor is installed at the fixed end of the rotating shaft and is rigidly connected to the rotating shaft coaxially, and is used to collect the actual angle rotated by the fixed rod in real time. The main sensor and the auxiliary sensor are connected to the control system through an RS485 interface. It also includes two infrared alignment sensors, which are symmetrically arranged on the upper and lower parts of the bending block. The emitting end of the infrared alignment sensor points vertically to the cable surface and is symmetrical to the center line of the V-groove of the bending block. The infrared alignment sensor is used to detect the alignment error between the cable and the bending block. When the alignment error is > ±0.3mm, an alarm signal is issued.

[0014] The working method of the tool for bending large-diameter cables of the present invention is characterized in that: the large-diameter cable to be bent is placed on the upper surface of the telescopic plate, and the telescopic plate is driven by the gears and racks driven by the first motor to move closer to the machine box. When it moves to the point where the pressure roller and the bending block respectively press against both sides of the large-diameter cable, the locking nut is turned so that the center line of the V-shaped groove on the bending block is always at the same height as the axis of the cable. The two sets of adjusting brackets are driven by the third driving mechanism to swing, so that the included angle between the two sets of adjusting brackets gradually decreases. The pressure of the pressure roller and the bending block drives the cable to bend. The cable is bent from straight to a predetermined angle in two stages. The first stage is from 180 degrees to 140 degrees between the two sets of adjusting brackets, and the second stage is from 140 degrees to the set angle between the two sets of adjusting brackets. When the two sets of adjusting brackets are adjusted to the correct position in each stage, the bending block is driven by the second motor to rotate forward and backward for 30 seconds to eliminate the stress on the cable and ensure that the cable remains bent after the stress is released.

[0015] Structural advantages of the present invention: 1. Integrated transmission structure with multi-motor coordinated drive: Through the independent control and linkage design of the first motor (moving the telescopic plate), the second motor (rotating the bending block), and the third motor (adjusting the bracket angle), the automated process of cable positioning, angle adjustment, and bending forming is realized, replacing the traditional manual hydraulic drive.

[0016] 2. Removable multi-specification pressure roller adaptability structure: The pressure roller and the adjustment bracket are detachably connected, which supports the quick replacement of different models of pressure rollers according to the cable diameter. With rolling bearings and polished surface design, it takes into account both adaptability and low friction requirements.

[0017] 3. Height-adjustable moving rod buffer limit structure: It consists of a fixed rod (threaded rod, circular boss, limit bar), moving rod, spring, and locking nut. The limit bar and the slot cooperate to transmit torque, the spring buffers the force, and the locking nut fixes the height, so as to realize the adjustment of cable alignment accuracy and protection against bending force.

[0018] 4. Worm Gear Driven Adjustment Bracket Structure: The worm gear is fixedly connected to the adjustment bracket, and the worm is driven by a third motor. By utilizing the precise transmission ratio and self-locking characteristics of the worm gear, the bending angle can be precisely adjusted and the positioning can be reliably positioned after forming, thus solving the springback problem.

[0019] 5. V-groove alignment bending block design: A V-groove is set on the surface of the bending block. The cable is automatically aligned by the groove surface, ensuring that the cable axis is at the same height as the center line of the bending block during the bending process, thus improving the bending accuracy.

[0020] 6. Intelligent upgrade structure of sensor closed-loop control: integrates several sensors to realize intelligent functions such as reading data such as bending angle, accurate positioning, and monitoring cable alignment. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the tool for bending large-diameter cables according to the present invention; Figure 2 This is a three-dimensional structural diagram from another perspective of the present invention; Figure 3 yes Figure 1 A partial exploded view; Figure 4 This is a cross-sectional view of the present invention; Figure 5 yes Figure 4 A partial view.

[0022] Figure 6 This is a top view of the invention in operation (when the cable begins to bend). Figure 7 This is a top view of the invention in operation (during the bending of the cable). Figure 8 It is a cross-sectional view showing the deviation of the bending block from the center of the cable; Figure 9 It is a cross-sectional view showing the bending block aligned with the center of the cable. Detailed Implementation

[0023] 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.

[0024] The tool for bending large-diameter cables of the present invention includes a housing 1 and a telescopic plate 2 connected to the bottom of the housing 1 and capable of telescopic movement relative to the housing. The telescopic movement of the telescopic plate is controlled by a guide groove 13 provided at the bottom of the housing for limiting the telescopic movement of the telescopic plate. A first gear driven by a first motor is provided inside the housing next to the guide groove. A rack (not shown in the figure) is provided on the telescopic plate that can mesh with the first gear. When the first motor is working, it drives the first gear to rotate and drives the rack and the telescopic plate 2 to telescopically move along the guide groove 13.

[0025] Two sets of adjusting brackets 3 are symmetrically hinged on the free end of the telescopic plate 2. Two sets of pressure rollers 4 for pressing the cable are installed on the adjusting brackets 3. The adjusting brackets are provided with elongated grooves 12. The pressure rollers 4 are set vertically relative to the adjusting brackets. The lower part of the pressure rollers is provided with screws that can pass through the elongated grooves 12. The screws are locked by nuts below the adjusting brackets. This structure enables the pressure rollers 4 to be disassembled and replaced.

[0026] A bending block 5 is rotatably connected to the housing 1, which cooperates with the two pressure rollers 4 to abut against the cable 01. The bending block 5 is provided with a V-shaped groove for abutting against the cable 01. The bending block 5 is set on the symmetrical center line of the two pressure rollers, and the bending block and the two pressure rollers abut against both sides of the cable. The two sets of adjusting brackets 3 are driven to swing by the third drive mechanism set at the free end of the telescopic plate to gradually reduce the angle between the adjusting bracket and the telescopic plate.

[0027] The third drive mechanism includes a worm 6 driven to rotate by a third motor. The inner end of the adjusting bracket 3 is provided with a worm wheel 7 that can mesh with the worm 6. Under the drive of the third motor, the worm 6 is driven to rotate, which in turn drives the worm wheel and the adjusting bracket 3 to swing around the hinge axis.

[0028] Specifically, a through groove 8 is opened in the middle of the free end of the telescopic plate 2 in the horizontal direction so that the telescopic plate forms two plates with upper and lower spacing at the free end. Lugs 9 are symmetrically arranged on both sides of the two plates. Through holes 10 are provided on the lugs 9. The adjusting bracket is a long strip plate. The inner end of the adjusting bracket (the worm gear 7 is located on the inner end) is inserted between the upper and lower lugs. The inner end of the adjusting bracket is provided with a hole 11. The through hole and the hole are coaxially stacked and a hinge shaft is installed through them. The worm gear is located on the peripheral side of the adjusting bracket that is coaxial with the hole.

[0029] In the third drive mechanism, the worm gear 6 is rotatably installed in the through groove 8, and the third motor 14 is fixedly installed on the free ends of the upper and lower plates. The rotating shaft of the third motor is coaxially fixedly connected to the worm gear. The worm wheel 7 set at the inner end of the adjusting bracket meshes with the worm gear 6 for transmission. Under the drive of the third motor, the worm gear 6 rotates and drives the worm wheel 7 to rotate, causing the adjusting bracket to swing around the hinge shaft in the through hole 10 and the hole 11.

[0030] The housing 1 is equipped with a second drive mechanism that drives the bending block 5 to rotate. The second drive mechanism includes a driving gear 16 and a driven gear 17 that mesh with each other and are installed in the housing. The driven gear is connected to the rotating shaft. The bending block is connected to the rotating shaft and its position on the rotating shaft can be adjusted.

[0031] The specific rotating shaft includes a fixed rod 18, a moving rod 19, a locking nut 20, and a spring 21. A driven gear 17 is located on the lower end of the fixed rod 18. The fixed rod 18 has a threaded rod 22, a circular boss 23, and a limiting strip 24 arranged from top to bottom. The upper end of the limiting strip 24 is connected to the lower surface of the circular boss 23. A bending block 5 is located on the moving rod 19. The moving rod has a sleeve structure, and a retaining ring 25 is located on the top of the moving rod. The threaded rod passes through the retaining ring 25 of the sleeve-shaped moving rod. The lower end of the spring... The end face contacts the upper surface of the circular boss, the upper end face of the spring contacts the retaining ring, the spring is sleeved on the outer periphery of the threaded rod, the outer periphery of the moving rod is fixed on the center of the bending block (it can be fixed by welding), the inner periphery of the moving rod is provided with a groove that cooperates with the limiting strip, the cooperation between the limiting strip and the groove can enable the motion energy to be transmitted to the moving rod in sequence through the driven gear, the fixed rod, the limiting strip, and the groove, so as to drive the bending block to rotate together, and the locking nut is threadedly connected to the threaded rod to axially limit the position of the moving rod.

[0032] This application also includes a rotation angle sensor, which includes a main sensor and an auxiliary sensor; The main sensor is installed at the rotational connection between the adjusting bracket and the telescopic plate, and is used to detect the included angle between the adjusting bracket and the telescopic plate; the auxiliary sensor is installed at the fixed end of the rotating shaft and is rigidly connected to the rotating shaft coaxially, and is used to collect the actual angle rotated by the fixed rod in real time; the main sensor and the auxiliary sensor are connected to the control system via an RS485 interface; it also includes infrared alignment sensors, two of which are symmetrically arranged on the upper and lower parts of the bending block, and the emitting end of the infrared alignment sensor points vertically to the cable surface and is symmetrical with the center line of the V-groove of the bending block (e.g., ...). Figure 8 , 9 As shown in the figure, infrared sensors 26 are respectively provided on the upper and lower surfaces of the bending block; the infrared alignment sensor is used to detect the alignment error between the cable and the bending block, and when the alignment error is > ±0.3mm, an alarm signal is issued.

[0033] During operation, the large-diameter cable to be bent is placed on the upper surface of the telescopic plate. The gears and racks driven by the first motor move the telescopic plate closer to the machine housing. When it moves to the point where the pressure roller and bending block press against both sides of the large-diameter cable, the locking nut is turned to ensure that the center line of the V-groove on the bending block is always at the same height as the cable axis. The third drive mechanism drives two sets of adjusting brackets to rotate, gradually reducing the angle between them. The pressure roller and bending block push the cable to bend, and the cable bends from straight to a predetermined angle in two stages. The first stage involves the angle between the two sets of adjusting brackets decreasing from 180 degrees to 140 degrees. The second stage involves the angle between the two sets of adjusting brackets decreasing from 140 degrees to a set angle (this set angle is the final angle between the two sets of adjusting brackets, and this set angle is equal to the predetermined angle to which the cable is to be bent). When the two sets of adjusting brackets are adjusted to the correct position in each stage, the second motor drives the bending block to rotate forward and backward for 30 seconds (at a speed of 1-2 cm per second) to eliminate the stress on the cable and ensure that the cable remains bent after the stress is released.

[0034] In summary, the advantages of this application are: 1. High degree of automation and controllable bending precision: The first, second and third motors drive the telescopic plate to move, the bending block to rotate and the adjustment bracket to adjust the angle, respectively. Combined with sensor closed-loop control, it can achieve "automatic stop when in position".

[0035] 2. No hydraulic system risks and strong operational stability: It abandons the hydraulic drive structure and adopts pure electric motor + mechanical transmission (gear, worm gear), eliminating the risk of hydraulic oil leakage.

[0036] 3. Wide range of compatible specifications and strong compatibility: The roller adopts a detachable design, supporting the replacement of multiple specifications and models; the height of the moving rod can be adjusted by locking nut + spring structure; the travel of the telescopic plate is adjustable, adapting to different diameters (including large cross-sections of 70 square meters and above) and high hardness armored cables.

[0037] 4. High consistency of bending angle and no rebound displacement: The adjustment bracket adopts worm gear transmission, which has a natural self-locking function and can be reliably positioned when there is no power input.

[0038] 5. Precise cable alignment and no bending deviation: The bending block is equipped with a V-groove, which, together with the alignment sensor, ensures that the center line of the bending block is always at the same height as the cable axis.

[0039] 6. Smooth transmission and long service life: The meshing surfaces of the worm gear and worm are precision ground, resulting in a large contact area, which disperses the force and reduces wear; the rollers are polished and use rolling bearings to reduce frictional resistance.

[0040] The above descriptions are merely embodiments of the present invention, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

[0041] To improve the control effect, this application also includes some sensors, and the sensor arrangement scheme is as follows: 1. Rotation angle sensor (core component: enables reading of cable bending angle) Installation location: (1) Main and auxiliary sensors: installed at the rotational connection between the adjusting bracket and the telescopic plate (two sets are provided to detect the swing angle of the two adjusting brackets respectively). (2) Auxiliary sensor: installed on the rotating shaft (end of the fixed rod), and rigidly connected to the rotating shaft on the same axis (rotates synchronously with the bending block); Working principle: It adopts absolute value rotation encoding technology, which converts the mechanical rotation angle into a digital signal through internal photoelectric conversion. The signal is transmitted to the control system in real time via RS485 interface. It does not require power-off memory and can directly read the absolute angle value.

[0042] Example of use: When a 120 square millimeter armored cable needs to be bent 90°, the operator inputs the preset angle, the third motor drives the adjustment bracket to rotate, and the main sensor feeds back the angle of the adjustment bracket to 90° and then stops the machine; that is, the control system immediately cuts off the power to the third motor, and the bending operation is completed accurately.

[0043] 2. Linear displacement sensor Installation location: Inside the guide groove of the chassis, fixed parallel to the telescopic plate, and the sensor slider is rigidly connected to the telescopic plate through the connector (moving synchronously with the telescopic plate).

[0044] Working principle: Based on the resistive sensing principle, the movement of the telescopic plate drives the slider to change the internal resistance value of the sensor, which is converted into a 4-20mA standard current signal, corresponding to a displacement of 0-500mm.

[0045] Actual effects: (1) Real-time monitoring of the extension length of the telescopic plate with an accuracy of ±0.5mm, ensuring accurate cable bending support position; (2) Automatic setting of telescopic length in conjunction with the control system (matching according to cable specifications), replacing manual measurement.

[0046] Example of use: When bending a cable with a diameter of 60mm, the system automatically calculates that the telescopic plate needs to extend 350mm according to preset parameters. The first motor drives the telescopic plate to move. When the displacement sensor feeds back a current signal of 16mA (corresponding to 350mm), the first motor stops, and the automatic positioning is completed.

[0047] 3. Miniature pressure sensor Installation location: Inner wall of the V-groove of the curved block (embedded installation, surface flush with the groove surface), with 2 evenly arranged in each V-groove (symmetrical left and right).

[0048] Working principle: Based on the piezoresistive effect, when the cable bends, it generates pressure on the groove surface. The change in resistance value of the sensor's sensitive element is converted into a 0-5V voltage signal, reflecting the magnitude of the force on the cable.

[0049] Actual effects: (1) Real-time monitoring of contact pressure during cable bending process to avoid insulation layer damage or conductor damage; (2) Preset pressure thresholds for different cables (e.g., 300KPa for 70 square cable and 450KPa for 120 square cable), and automatically stop alarm when overloaded.

[0050] Example of use: When bending a high-hardness armored cable, if the pressure sensor detects that the pressure reaches 500 kPa (exceeding the preset 450 kPa), the control system will immediately cut off the power to the second motor, and the display screen will show "overload protection". The operator can then restart the motor after adjusting the height of the moving rod or the angle of the bracket.

[0051] 4. Infrared alignment sensor (Model EPT PS-IR 16 D) Installation location: upper and lower part of the bending block, with the sensor transmitter pointing vertically towards the cable surface.

[0052] Working principle: The emitted infrared light is reflected by the cable surface and received by the receiver. The horizontal distance between the sensor and the cable is calculated based on the reflection distance. The cable alignment is determined by the distance difference between the two sensors.

[0053] Actual effects: (1) The centering error is ≤ ±0.3mm, ensuring that the center line of the bending block is at the same height as the cable axis; (2) Automatic alarm when there is deviation, avoiding bending deviation. When the cable is crushed and bent, internal stress will be generated, which will make the cable easily return to its original state and cause bending failure.

[0054] Example of use: After the cable is installed, the upper sensor detects a distance of 2.2cm and the lower sensor detects a distance of 2.7cm (the difference is 0.5cm > the threshold of 0.3cm). The system will sound an alarm and the display will show "Cable Misalignment". The operator should loosen the locking nut and adjust the height of the moving rod until the difference is ≤0.3cm. The bending program can only be started after the alarm is cleared. By ensuring that the distance values ​​detected by the upper and lower sensors are similar, the bending block is prevented from being misaligned with the cable. This helps to prevent the cable from bending skewed, reduces the generation of internal stress, and ensures the stability of the cable bending.

[0055] Specific implementation of cable bending angle reading function (a) Core Participating Components (II) Implementation Process (Closed-Loop Control Logic) Angle preset input: The operator inputs the target bending angle (such as 45°, 90°, 135°) through the industrial touch screen, and the system stores and displays the preset value.

[0056] Adjust the bracket angle for calibration: The control system sends a drive signal to the third motor, which drives the worm gear and the adjusting bracket to rotate through the worm. The main angle sensor collects the bracket's angle signal in real time and transmits it to the microcontroller. When the angle of the adjustable bracket reaches the preset angle matching value (according to the mechanical model, the angle between the two adjustable brackets = the target bending angle), the microcontroller sends a stop signal, the third motor stops, and the angle preset is completed.

[0057] Bending process angle monitoring: The main angle sensor monitors and transmits bending angle data to the microcontroller every 1ms. The touchscreen displays "Preset Angle → Current Angle" (e.g., "90°-30°-60°-90°") in real time.

[0058] Automatically stops when in position: When the main sensor detects that the difference between the actual angle and the preset angle is ≤ ±0.5°, the microcontroller immediately sends a stop signal to the third motor driver; At the same time, the touch screen displays "Bending complete". If continuous bending is required, the system will automatically remember the current position and repeat the above process after moving the device.

Claims

1. A tool for bending a large diameter cable, characterized in that, The utility model relates to a cable bending device, including the chassis and the telescopic plate connected in the chassis bottom and can relative telescopic motion of chassis, two groups of adjusting support are symmetrically hinged on the free end of telescopic plate, two groups of pressure roller for pressing cable are installed on the adjusting support, the bending block that cooperates with two pressure rollers is toped with the rotation connection of the chassis to cable, the bending block sets up on two pressure roller symmetry center line, and bending block and two pressure rollers press in the both sides of cable, two groups of adjusting support are driven to swing by the third drive mechanism setting in the free end of telescopic plate, to gradually reduce the included angle of adjusting support and telescopic plate.

2. A tool for bending a large diameter cable according to claim 1, characterized in that The third drive mechanism includes a worm driven by a third motor, the inner end of the adjusting support is provided with a worm wheel capable of engaging with the worm, the worm is driven to rotate under the drive of the third motor, in turn driving the worm wheel and the adjusting support to swing around the hinge shaft.

3. A tool for bending a large diameter cable according to claim 2, characterized in that, The free end of the telescopic plate is provided with a through groove in the middle part in the horizontal direction, so that the telescopic plate forms two upper and lower spaced plates at the free end, and lugs are symmetrically arranged on both sides of the two plates, the lugs are provided with through holes, the adjusting support is a long strip plate, the inner end of the adjusting support is inserted between the upper and lower lugs, the inner end of the adjusting support is provided with a hole, the through hole and the hole are coaxially stacked and the hinge shaft is installed through the hole, and the worm wheel is arranged on the coaxial side of the hole of the adjusting support.

4. A tool for bending a large diameter cable according to claim 3, characterized in that The worm is rotatably installed in the through groove, and the third motor is fixedly installed on the end of the free end of the upper and lower plates, and the shaft of the third motor is coaxially fixedly connected with the worm.

5. A tool for bending a large diameter cable according to claim 4, characterized in that The adjusting support is provided with a long slot, the pressure roller is vertically arranged relative to the adjusting support, the lower part of the pressure roller is provided with a screw rod capable of penetrating the long slot, and the screw rod is locked by a nut below the adjusting support.

6. A tool for bending a large diameter cable according to claim 5, characterized in that The bottom of the chassis is provided with a guide groove for limiting the telescopic movement of the telescopic plate, a first gear driven by a first motor is arranged beside the guide groove in the chassis, and a rack capable of engaging with the first gear is arranged on the telescopic plate.

7. A tool for bending a large diameter cable according to claim 6, characterized in that The chassis is provided with a second drive mechanism for driving the bending block to rotate by a second motor, the second drive mechanism includes a driving gear and a driven gear arranged in the chassis and engaging with each other, the driven gear is connected with a rotating shaft, and the bending block is connected with the rotating shaft and can adjust the position on the rotating shaft.

8. A tool for bending a large diameter cable according to claim 7, characterized in that The rotating shaft comprises a fixed rod, a movable rod, a locking nut and a spring, a driven gear is arranged on the lower end of the fixed rod, a threaded rod, a circular boss and a limiting strip are arranged on the upper part of the fixed rod, the end of the limiting strip is connected with the lower surface of the circular boss, a bending block is arranged on the movable rod, the movable rod is in a sleeve structure, a check ring is arranged on the inner top of the movable rod, the threaded rod passes through the sleeve-shaped movable rod, the lower end surface of the spring is in contact with the upper surface of the circular boss, the upper end surface of the spring is in contact with the check ring, the spring is sleeved on the outer periphery of the threaded rod, the outer periphery of the movable rod is fixed on the central part of the bending block, the inner periphery of the movable rod is provided with a clamping groove matched with the limiting strip, the cooperation of the limiting strip and the clamping groove can make the movement be transmitted to the movable rod in sequence through the driven gear, the fixed rod, the limiting strip and the clamping groove, so as to drive the bending block to rotate, the locking nut is threadedly connected with the threaded rod, and is used for axially limiting the position of the movable rod, so as to ensure that the center line of the V-shaped groove on the bending block is always the same as the axis of the cable.

9. A tool for bending a large diameter cable according to claim 8, characterized in that Further comprising a rotation angle sensor, the rotation angle sensor comprises a main sensor and an auxiliary sensor; The main sensor is installed at the rotating connection between the adjusting support and the telescopic plate, and is used for detecting the included angle between the adjusting support and the telescopic plate; the auxiliary sensor is installed at the end of the fixed rod of the rotating shaft, and is rigidly connected with the rotating shaft coaxially, and is used for collecting the actual angle of rotation of the fixed rod in real time; the main sensor and the auxiliary sensor are connected with the control system through an RS485 interface; further comprising an infrared centering sensor, the infrared centering sensor is two, and is symmetrically arranged on the upper part and the lower part of the bending block, and the emission end of the infrared centering sensor is vertically directed to the surface of the cable, and is symmetric with the center line of the V-shaped groove of the bending block; the infrared centering sensor is used for detecting the centering error of the cable and the bending block, and an alarm signal is sent when the centering error is greater than ±0.3mm.

10. A method of operating a tool for bending a large diameter cable as claimed in claim 9, characterised in that, The large-diameter cable to be bent is placed on the upper surface of the telescopic plate, the telescopic plate is driven to move close to the cabinet by the gear and the rack driven by the first motor, when the pressing roller and the bending block press the two sides of the large-diameter cable to be bent respectively, the locking nut is rotated, so that the center line of the V-shaped groove on the bending block is always the same as the axis of the cable, the two groups of adjusting supports are driven to swing by the third driving mechanism, so that the included angle of the two groups of adjusting supports is gradually reduced, the cable is bent by the pressing of the pressing roller and the bending block, and the cable is bent to a predetermined angle in two stages, the first stage is from 180 degrees to 140 degrees, and the second stage is from 140 degrees to a set angle, when the two groups of adjusting supports are adjusted to the position in each stage, the bending block is driven to rotate forward and reverse for 30 seconds by the second motor, so as to eliminate the stress of the cable, and ensure that the cable remains bent after the force is removed.

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