Retaining frame production mold demagnetization device

Abstract

The application discloses a bearing retainer production mold demagnetization device, and belongs to the field of mold demagnetization. The device comprises a support rack, a positioning support platform fixedly arranged on the support rack and used for bearing the bearing retiner production mold to be demagnetized, a full-coverage dynamic demagnetization module comprising a demagnetization coil assembly capable of linearly moving along the support rack, wherein the demagnetization coil assembly moves to the position of the positioning support platform, and the magnetic field range of the demagnetization coil assembly can completely cover the geometric contour of the mold to be demagnetized, and a demagnetization control unit electrically connected with the demagnetization coil assembly and a demagnetization power supply and configured to trigger the demagnetization power supply to output an alternating magnetic field with preset parameters when the demagnetization coil assembly moves to completely cover the mold, wherein the alternating magnetic field has a constant amplitude and a periodically reversed magnetic field direction; meanwhile, when the demagnetization coil assembly reversely moves away from the mold to a preset distance, the demagnetization current decays to zero, and the mold is demagnetized in a mode of combination of moving away and decay.

Description

Technical Field

[0001] This application belongs to the field of mold demagnetization, and in particular relates to a demagnetization device for bearing cage production molds. Background Technology

[0002] In modern manufacturing, stamping technology has become an indispensable key technology in many processing fields due to its outstanding advantages such as high efficiency, precision, and the ability to achieve mass production. As the core equipment in the stamping process of bearing cages, the performance and quality of stamping dies directly determine the precision, quality, and production efficiency of stamped products. During the stamping process, the die must withstand extremely high pressure. Under the repeated stamping cycle, the die material is continuously subjected to strong extrusion, resulting in significant changes in its internal crystal lattice structure. From a microscopic perspective, the distortion, deformation, and rearrangement of the crystal lattice disrupt the original magnetic domain structure balance of the material, thereby causing the die to generate remanence, and the depth of remanence is usually quite large.

[0003] This deep-seated residual magnetism can cause multiple negative effects: the mold surface easily attracts impurities such as metal shavings and iron filings. During the stamping process, these impurities may mix between the mold and the blank, causing scratches and wear on the mold surface or the cage, significantly shortening the mold's service life. Therefore, effective demagnetization treatment of stamping dies is crucial.

[0004] However, demagnetizing large stamping dies presents unique challenges. These dies are enormous and significantly heavy, placing extremely high demands on existing die movement drive systems. To ensure smooth die movement, the drive system must possess powerful output capabilities to provide sufficient traction or thrust to overcome the die's weight. This not only significantly increases equipment purchase costs but also severely tests the reliability and stability of the drive system. Therefore, existing technologies still have room for improvement and require further optimization to meet actual production needs. Summary of the Invention

[0005] This invention provides a demagnetizing device for bearing cage production molds, which solves the problem that existing devices for driving the molds to move into the demagnetizing device have sufficient power to overcome the weight of the molds, thus increasing the cost of equipment purchase, maintenance and operation.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A demagnetizing device for bearing cage production molds, comprising:

[0008] Support frame;

[0009] The positioning platform is fixedly installed on the support frame and is used to support the production mold of the bearing cage to be demagnetized;

[0010] The full-coverage dynamic demagnetization module includes a demagnetization coil assembly that can move linearly along the support frame. When the demagnetization coil assembly moves to the positioning platform, its magnetic field range can completely cover the geometric contour of the mold to be demagnetized.

[0011] The demagnetizing control unit, electrically connected to the demagnetizing coil assembly and the demagnetizing power supply, is configured as follows:

[0012] When the demagnetizing coil assembly moves to completely cover the mold, it triggers the demagnetizing power supply to output an alternating magnetic field with preset parameters. The alternating magnetic field has a constant amplitude and the magnetic field direction is periodically reversed. At the same time, when the demagnetizing coil assembly moves away from the mold to a preset distance, the demagnetizing current decays to zero, realizing demagnetization through a combination of mold relocation and decay.

[0013] In a preferred embodiment, the support frame includes upper and lower crossbeams that are parallel to each other and vertically corresponding. A connecting beam connects two upper crossbeams and two lower crossbeams to form vertically corresponding and parallel rectangular frames. Support beams are set at the four corners of the two opposing rectangular frames. A high-load-bearing positioning platform is set on the upper side of the upper rectangular frame. The demagnetizing coil assembly is set on the upper side of the lower rectangular frame, and the upper crossbeam passes through the central demagnetizing area of ​​the demagnetizing coil assembly.

[0014] In a preferred embodiment, the bottom of the demagnetizing coil assembly is provided with a slider, and the lower crossbeam is provided with a guide rail extending along its length. The slider is mounted on the guide rail, and the bottom of the demagnetizing coil assembly is connected to a movable seat of a ball screw moving mechanism. The movable seat can move linearly with the screw. The screw is connected to a reduction motor, and the action of the reduction motor causes the screw to rotate, driving the movable seat to move and thus moving the demagnetizing coil assembly.

[0015] In a preferred embodiment, the lower crossbeam is equipped with a laser sensor, which corresponds to the demagnetizing coil assembly. The laser sensor measures the distance between itself and the demagnetizing coil assembly and transmits the distance to the controller. The controller controls the demagnetizing power supply to start or stop and controls the geared motor to rotate forward and backward based on the distance signal. The demagnetizing coil assembly and the support frame are equipped with safety light curtains to prevent the mold from being placed irregularly and hitting the demagnetizing coil.

[0016] In a preferred implementation, a control system is also included. The control system stores various workpiece demagnetization current parameters and inputs the workpiece part number through a display screen to achieve automated demagnetization.

[0017] In a preferred implementation, the demagnetizing power supply is a three-phase full-wave DC ultra-low frequency demagnetizing power supply.

[0018] In a preferred implementation, an adaptive cable control device is also included, comprising a flexible cable and a cable attitude control mechanism. The flexible cable is used to establish an electrical connection between the demagnetizing coil assembly and the demagnetizing power supply. The cable attitude control mechanism can adjust the cable attitude during the movement of the demagnetizing coil assembly, maintain connection stability, and prevent grounding wear.

[0019] In a preferred embodiment, the cable attitude control mechanism includes a fall protection component, which is respectively disposed in the preset mounting positions of the demagnetizing coil assembly housing and the demagnetizing power supply housing. The fall protection component partially fixes the cable segment near the connection position of the demagnetizing coil assembly and the demagnetizing power supply and maintains a preset tension in the cable between the connection position and the clamping part. When the demagnetizing coil assembly moves, the tension of the cable between the connection position and the fall protection component remains unchanged, preventing the connection position from being subjected to additional tension.

[0020] In a preferred implementation, a follow-up component is also included, which is located in the middle region of the cable connected between the two fall arrest components. The demagnetizing coil component can move during the movement of the cable, so that the cable is unfolded segment by segment. When the demagnetizing coil component is reset, the cable is retracted in an orderly manner, so that the lowest point of the cable does not come into contact with the ground and is not worn.

[0021] In a preferred embodiment, the follower component includes a movable frame, a sliding part at the bottom of the movable frame, the sliding part being connected to a movable guide rail on the side of the support frame, a clamping part at the top of the movable frame for clamping cables, a motor connected at the bottom, a gear connected to the output shaft of the motor, and a rack at the bottom of the support frame, with the gear and rack engaging.

[0022] The above structure has the following beneficial effects:

[0023] The bearing cage production mold demagnetizing device of this application, through a full-coverage dynamic demagnetizing module and a composite demagnetizing method, can more thoroughly eliminate residual magnetism inside the bearing cage production mold. The periodic reversal of the alternating magnetic field and the control of current decay help to break the imbalance of magnetic domain structure caused by the distorted and deformed lattice structure inside the mold material due to repeated stamping, fundamentally solving the problem of residual magnetism in the mold, reducing the possibility of metal debris, iron filings and other impurities adsorbed on the mold surface, thereby reducing the risk of scratches and wear on the mold surface or the cage, and extending the service life of the mold.

[0024] The bearing cage production mold demagnetizing device of this application significantly optimizes the cable management problem of demagnetizing equipment in long-distance movement scenarios by introducing a follower component. By dynamically adjusting the cable shape, mechanical protection is achieved, and the cable is always in a safe state without interrupting the demagnetizing process due to wear or entanglement. Attached Figure Description

[0025] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this invention, illustrate exemplary embodiments of the invention and, together with their description, serve to explain this application and do not constitute an undue limitation of the invention. In the drawings:

[0026] Figure 1 A schematic three-dimensional structural diagram of one embodiment of the demagnetizing device for bearing cage production molds of this application is shown.

[0027] Figure 2 A schematic three-dimensional structural diagram illustrating one embodiment of the demagnetizing device for the bearing cage production mold of this application, with a flexible cable installed;

[0028] Figure 3 This application is illustrated. Figure 2 An enlarged structural schematic diagram of one embodiment of part A in the diagram;

[0029] Figure 4 The illustration shows a three-dimensional structural diagram of one embodiment of the demagnetizing device for the bearing cage production mold of this application moving to the covering mold;

[0030] Label Explanation:

[0031] 1. Frame; 10. Upper crossbeam; 11. Lower crossbeam; 110. Moving guide rail; 12. Support beam; 13. Connecting beam; 14. Rack; 2. Positioning platform; 20. Through hole; 3. Demagnetizing coil assembly; 30. Forced air cooling device; 31. Safety light curtain; 4. Control system; 50. Guide rail; 51. Slider; 52. Gear motor; 53. Lead screw; 6. Laser sensor; 7. Flexible cable; 8. Mold; 90. Fall protection assembly; 910. Moving frame; 9100. Sliding part; 911. Clamping part; 912. Motor; 9120. Gear. Detailed Implementation

[0032] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit and scope of the invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0033] The present invention will now be described with reference to the accompanying drawings.

[0034] The specific solution adopted is as follows:

[0035] like Figure 1-4 As shown, the present invention provides a demagnetizing device for bearing cage production molds, comprising:

[0036] Support frame 1;

[0037] Positioning platform 2 is fixedly set on support frame 1 and is used to support bearing cage production mold 8 to be demagnetized;

[0038] The full-coverage dynamic demagnetization module includes a demagnetization coil assembly 3 that can move linearly along the support frame 1. The demagnetization coil assembly 3 moves to the positioning platform 2 and its magnetic field range can completely cover the geometric contour of the mold 8 to be demagnetized.

[0039] The demagnetizing control unit, electrically connected to the demagnetizing coil assembly 3 and the demagnetizing power supply, is configured as follows:

[0040] When the demagnetizing coil assembly 3 moves to completely cover the mold 8, it triggers the demagnetizing power supply to output an alternating magnetic field with preset parameters. The alternating magnetic field has a constant amplitude and the magnetic field direction is periodically reversed. At the same time, when the demagnetizing coil assembly 3 moves away from the mold 8 to a preset distance, the demagnetizing current decays to zero, realizing demagnetization by moving away from the mold 8 and decaying in a combined manner.

[0041] The demagnetizing device for bearing cage production mold 8 of this application features a demagnetizing coil assembly 3 in a fully covered dynamic demagnetizing module that can move linearly along the support frame 1. When it moves to the positioning platform 2, its magnetic field range can completely cover the geometric contour of the mold 8 to be demagnetized. This ensures that every part of the mold 8 is within the effective range of the demagnetizing magnetic field, avoiding the problem of local residual magnetism caused by incomplete magnetic field coverage. As a result, residual magnetism on the surface and inside of the mold 8 can be eliminated more thoroughly, improving the demagnetizing effect.

[0042] Demagnetization employs a combined approach of moving away from the mold 8 and attenuation. When the demagnetizing coil assembly 3 moves to completely cover the mold 8, it triggers the demagnetizing power supply to output an alternating magnetic field with preset parameters. This alternating magnetic field has a constant amplitude and its direction periodically reverses. This alternating magnetic field can more effectively disrupt the magnetic domain structure inside the mold 8, accelerating the elimination of residual magnetism. Simultaneously, when the demagnetizing coil assembly 3 moves away from the mold 8 to a preset distance, the demagnetizing current attenuates to zero. This combined approach integrates the effects of magnetic field action and distance variation on demagnetization, further improving demagnetizing efficiency and shortening demagnetizing time.

[0043] The demagnetizing control unit is electrically connected to the demagnetizing coil assembly 3 and the demagnetizing power supply, enabling automated control of the entire demagnetizing process. Operators only need to set the relevant parameters, and the device can automatically complete the demagnetizing operation according to the preset program, reducing manual intervention, lowering operational difficulty and labor intensity, and improving production efficiency. It avoids the difficulty of directly moving the large mold 8. The demagnetizing coil assembly 3 is relatively lightweight, requiring less power to move, and placing lower demands on the drive system, thus reducing equipment purchase costs and the burden on the reliability and stability of the drive system.

[0044] See Figure 1In a preferred embodiment of this application, the support frame 1 includes an upper crossbeam 10 and a lower crossbeam 11 that are parallel and vertically corresponding to each other. These two beams are connected by a connecting beam 13 to form vertically corresponding and parallel rectangular frames. The rectangular frame is a very stable and regular geometric structure. When subjected to external forces, the force distribution is relatively uniform, effectively distributing the force acting on the frame to each beam, avoiding local stress concentration, and thus ensuring that the entire frame is not easily deformed or damaged when subjected to large loads. Support beams 12 are located at the four corners of the two opposing rectangular frames, serving to connect and reinforce the two rectangular frames. They tightly combine the upper and lower rectangular frames together to form a more stable overall structure, greatly enhancing the rigidity of the entire support frame 1. During the operation of the demagnetizing device, when subjected to external forces such as the weight of the mold 8 and the force generated by the movement of the demagnetizing coil assembly 3, the support beams 12 can effectively resist the frame deformation caused by these forces, ensuring that the shape and size of the support frame 1 remain stable.

[0045] The high-load-bearing positioning platform 2 is specifically designed to support the production mold 8 of the bearing cage to be demagnetized. It is positioned on the upper rectangular frame, fully utilizing the stable support of the upper frame to provide a stable and reliable support platform for the mold 8. The demagnetizing coil assembly 3 is positioned on the lower rectangular frame, which provides a stable support foundation for it. During demagnetization, the demagnetizing coil assembly 3 needs to generate an alternating magnetic field and will move linearly. Stable support ensures that the coil assembly will not shake or shift during operation, guaranteeing a stable and uniform magnetic field, thereby improving the demagnetization effect. The upper crossbeam 10 passes through the central demagnetizing area of ​​the demagnetizing coil assembly 3. On the one hand, the presence of the upper crossbeam 10 will not significantly interfere with the magnetic field generated by the demagnetizing coil assembly 3. The upper crossbeam 10 can be made of non-magnetic material, which will not affect the distribution and intensity of the magnetic field. On the other hand, this layout makes the entire device more compact, making reasonable use of space, and also helps to optimize the distribution of the magnetic field, allowing the magnetic field to better cover the mold 8 to be demagnetized, thus improving demagnetization efficiency.

[0046] Furthermore, the bottom of the demagnetizing coil assembly 3 is equipped with a slider 51, and a guide rail 50 extending along the length of the lower crossbeam 11 provides a precise guiding path for the movement of the demagnetizing coil assembly 3. The slider 51 is mounted on the guide rail 50, and the two fit tightly together, ensuring that the demagnetizing coil assembly 3 can only move along the direction set by the guide rail 50. This effectively avoids deviation, swaying, or lateral displacement during movement, ensuring the accuracy of the movement direction. The contact surface between the slider 51 and the guide rail 50 is made of a low-friction coefficient material or surface coating, which can significantly reduce the friction between them. This low-friction design makes the movement of the demagnetizing coil assembly 3 smoother, requires less driving force, reduces energy consumption, and also reduces heat and wear caused by friction, extending the service life of the slider 51 and the guide rail 50.

[0047] The ball screw 53 moving mechanism is a high-precision transmission device that converts rotary motion into linear motion. In the moving system of the demagnetizing coil assembly 3, the geared motor 52 has a large starting torque and a low starting current, providing smooth and sufficient power to the ball screw 53 at startup. The ball screw 53 can accurately convert the rotary motion output by the geared motor 52 into the linear movement of the demagnetizing coil assembly 3, achieving high transmission accuracy and meeting the positional accuracy requirements of the demagnetizing coil assembly 3. When the demagnetizing coil assembly 3 needs to precisely cover a specific part of the mold 8, the ball screw 53 can ensure that it accurately reaches the designated position, guaranteeing the uniformity and consistency of the demagnetizing effect.

[0048] Furthermore, the lower crossbeam 11 is equipped with a laser sensor 6. Laser sensors are installed before and after the demagnetizing coil to monitor material feeding and discharge as well as collision prevention. At the same time, demagnetization is started after material is received and stopped after material is discharged, repeating the cycle. Specifically, the laser sensor 6 corresponds to the demagnetizing coil assembly 3. The laser sensor 6 measures the distance between itself and the demagnetizing coil assembly 3 and transmits it to the controller. The controller controls the demagnetizing power supply to start or stop and controls the geared motor 52 to rotate forward and backward according to the distance signal. The demagnetizing coil assembly and the supporting frame are equipped with a safety light curtain 31 to prevent the mold from being placed irregularly and hitting the demagnetizing coil.

[0049] Specifically, before the system starts working, a series of key parameters need to be preset in the controller according to the demagnetization process requirements. These parameters include the standard distance range between the demagnetizing coil assembly 3 and the mold 8, the distance thresholds corresponding to the start and stop of the demagnetizing power supply, the moving speed of the geared motor 52, and the forward and reverse control logic. For example, the laser sensor 6 on the right side of the diagram is set to start the demagnetizing power supply when it detects that the distance to the demagnetizing coil assembly 3 is less than 10mm; and to stop the demagnetizing power supply when the distance is greater than 50mm. At the same time, the forward and reverse speeds of the geared motor 52 are set under different distance conditions to achieve precise movement control of the demagnetizing coil assembly 3. When the laser sensor on the left side of the diagram detects that the distance to the demagnetizing coil assembly 3 is less than 10mm, the demagnetizing coil returns to its initial position, preventing further displacement and impact with the control system housing.

[0050] After the system starts, the laser sensor 6 begins to work, emitting a laser beam towards the demagnetizing coil assembly 3 and receiving the reflected laser signal. The controller determines that the measured distance is greater than the upper limit of the standard distance range, indicating that the demagnetizing coil assembly 3 is too far from the target demagnetizing area and needs to be moved closer to the target. At this time, the controller sends a forward rotation signal to the reduction motor 52. Upon receiving the signal, the reduction motor 52 begins to rotate forward, driving the demagnetizing coil assembly 3 along the guide rail 50 towards the mold 8 via the ball screw 53 moving mechanism. During the movement, the laser sensor 6 continuously measures the distance and feeds the real-time distance signal back to the controller. The controller adjusts the speed of the reduction motor 52 in real time according to the distance changes to ensure that the demagnetizing coil assembly 3 moves smoothly at a suitable speed. Upon reaching the designed coverage position, the demagnetizing power supply receives the signal and begins to work, providing the required current to the demagnetizing coil assembly 3 to generate an alternating magnetic field. Simultaneously, the controller sends a reverse rotation signal to the reduction motor 52, causing the reduction motor 52 to reverse and drive the demagnetizing coil assembly 3 along the guide rail 50 away from the mold 8 via the ball screw 53 moving mechanism. Similarly, the laser sensor 6 provides real-time distance information, and the controller adjusts the motor speed according to the distance changes to achieve smooth movement.

[0051] Throughout the demagnetizing process, the laser sensor 6 continuously measures the distance to the demagnetizing coil assembly 3 and transmits the distance signal to the controller in real time. The controller continuously makes judgments and decisions based on this real-time data, dynamically adjusting the working state of the demagnetizing power supply and the forward and reverse rotation and speed of the reduction motor 52, forming a closed-loop control system 4 to achieve precise demagnetizing operation and improve the demagnetizing effect and quality.

[0052] In addition, a light grating is added to the demagnetizing coil to prevent the mold from colliding with it due to irregular placement. By setting safety light gratings on the front side of the demagnetizing coil and the end of the support frame, when the mold is placed off-center, part of it enters the detection area of ​​the safety light grating, and the demagnetizing coil does not start to move, thus preventing a collision.

[0053] Furthermore, the system includes a control system 4. This system is password-protected; after entering the password, users can access the system for modification and settings. The control system 4's storage module pre-stores demagnetizing current parameters for various workpieces, ensuring optimal demagnetization for each type of workpiece. Operators input the part number of the workpiece to be demagnetized through the input interface on the display screen. The display screen can be a touchscreen for convenient input. After input, the control system 4 quickly retrieves and matches parameters from the stored parameter database based on the input part number. The system then automatically completes a series of operations, including parameter retrieval, positioning of the demagnetizing coil assembly 3, and demagnetizing current control, improving production efficiency and reducing labor intensity.

[0054] In a preferred embodiment of this application, the demagnetizing power supply is a three-phase full-wave DC ultra-low frequency demagnetizing power supply. During the demagnetization process, the current direction continuously changes, while the current intensity gradually decreases to zero. This design causes the magnetic domains inside the mold 8 to gradually lose their orderly arrangement as the magnetic field direction repeatedly changes and the intensity decreases, eventually returning to a disordered state. The DC magnetic field acts directly on the surface of the mold 8, and the surface residual magnetism is quickly eliminated by the reverse cancellation between the magnetic field intensity and the residual magnetism direction. The penetrability of the ultra-low frequency current allows the magnetic field to penetrate deep into the interior of the mold 8, and combined with the commutation attenuation mechanism, ensures that the deep residual magnetism is eliminated synchronously.

[0055] The demagnetization of the large mold 8 requires a magnetic field strength of 300 Gs, necessitating a large current flow through the demagnetizing coil. This large current requires a large-section cable, which significantly increases the weight. The demagnetizing coil needs to reciprocate, and the cable connecting it to the demagnetizing power supply requires frequent bending and dragging, easily leading to friction with the ground or equipment. Stress concentration at the bends causes fatigue fracture of the copper core, reducing conductivity. Furthermore, the cable's gravity pull on the coil or power supply interface can cause it to detach, resulting in poor contact. Therefore, to address these issues, this application also includes an adaptive cable control device, comprising a flexible cable 7 and a cable attitude control mechanism. The flexible cable 7 establishes the electrical connection between the demagnetizing coil assembly 3 and the demagnetizing power supply. The cable attitude control mechanism adjusts the cable attitude during the movement of the demagnetizing coil assembly 3, maintaining connection stability and preventing grounding wear.

[0056] For details, see Figures 2-4 The cable attitude control mechanism includes a fall protection component 90, which is respectively installed in the preset mounting positions of the demagnetizing coil assembly 3 housing and the demagnetizing power supply housing. The fall protection component 90 partially fixes the cable segment near the connection position between the demagnetizing coil assembly 3 and the demagnetizing power supply and keeps the cable between the connection position and the clamping part 911 at a preset tension. When the demagnetizing coil assembly 3 moves, the tension of the cable between the connection position and the fall protection component 90 remains unchanged to prevent the connection position from bearing additional tension.

[0057] The principle is to divide the cable into a "segment near the connection point" and a "sag section in the middle." The anti-fall component 90 locally secures the cable near the connection point, while the middle section of the cable remains in a natural sag state. The anti-fall component 90, through its supporting structure, bears the weight of the sag section, ensuring the connection point bears only a small amount of cable weight, thus reducing the mechanical load on the connection point. When the demagnetizing coil assembly 3 moves, the cable length between the anti-fall component 90 and the connection point remains fixed, and the tension remains constant; the sag section of the cable naturally expands and contracts to adapt to the moving distance, preventing stress on the connection point due to pulling.

[0058] Anti-fall components 90 are installed at predetermined locations near the cable connection interface, such as on the side, to secure the cable near the connection location. Similarly, symmetrical anti-fall components 90 are installed at corresponding locations on the demagnetizing power supply housing. The anti-fall components 90 include a support frame and a wire harness fixing component. The support frame is L-shaped and can be fixed to the housing surface with bolts. The wire harness fixing component can be a clip, with the appropriate size selected according to the cable diameter. The clip is lined with rubber or silicone pads to prevent damage to the cable insulation layer during clamping.

[0059] Furthermore, it also includes a follow-up component, located in the middle region of the cable connected between the two anti-fall components 90. This component can move during the movement of the demagnetizing coil assembly 3, allowing the cable to unfold segment by segment. When the demagnetizing coil assembly 3 resets, it orderly retracts the cable, ensuring no contact wear between the lowest point of the cable and the ground. This solves the problem of the cable drooping in the middle dragging on the ground due to gravity, excessive bending leading to insulation damage, and copper core fatigue fracture during long-distance movement (e.g., >2m). It achieves "zero contact wear" during cable movement and avoids cable accumulation and tangling during reset.

[0060] The central drooping cable is divided into multiple movable segments by a follow-up component. Each segment is supported by an independent support unit and unfolds or retracts segment by segment as the demagnetizing coil assembly 3 moves.

[0061] initial state

[0062] The demagnetizing coil assembly 3 is located at the starting point of the track, with the cable hanging naturally, its lowest point suspended above the ground, forming an initial relaxed arc. At this time, the follower assembly 91 is in standby mode, maintaining a preset distance from the coil assembly. As shown in the diagram, the cable is divided into two sections.

[0063] First segment: The cable between the coil assembly and the follower assembly hangs naturally;

[0064] Second section: The cable between the follower component and the power interface hangs down naturally.

[0065] Movement Deployment Phase

[0066] The coil assembly begins moving along the track, gradually stretching the first cable segment. This segment unfolds with a preset slack to prevent stress concentration caused by tautness. When the first cable segment reaches the set length (i.e., the coil has moved the designed distance), the follower assembly activates, maintaining the current curvature of the first cable segment while simultaneously moving synchronously with the coil assembly. During the follower assembly's movement, the second cable segment is gradually stretched, following the same unfolding logic as the first segment, maintaining consistent slack in each segment through segmented control.

[0067] If the moving distance is long (e.g., >3m), multiple follow-up components can be added to release the cable segment by segment in a progressive mode of "deploy-synchronize-re-deploy".

[0068] End point state

[0069] The coil assembly reaches the end of the track, all cable segments are fully deployed, and the lowest point is still suspended above the ground.

[0070] Reset and storage stage

[0071] The coil assembly starts to move in the opposite direction. The first section of cable is retracted to the designed bending angle (i.e., the coil moves a distance that meets the design value). The follower assembly moves in the opposite direction at the same speed as the coil assembly. The second section of cable gradually contracts and folds in an orderly manner under the action of traction. The coil assembly returns to the starting point, and all cable sections are neatly stored.

[0072] The lowest point of the cable is always suspended in the air, completely eliminating the risk of dragging on the ground. The follow-up component ensures that the cable moves along the same path every time it is extended / retracted. During extension, the cable forms a preset arc, eliminating tensile stress from a taut state and compressive stress from excessive bending. Fixed bending points ensure that the bending angle of the cable remains essentially consistent each time it is retracted, extending the cable's lifespan.

[0073] See Figure 2 and Figure 3 The follow-up assembly includes a movable frame 910, with a sliding part 9100 at its bottom. The sliding part 9100 is connected to a movable guide rail 110 on the side of the support frame 1. A clamping part 911 is provided at the upper part of the movable frame 910 to clamp the cable, and a motor 912 is connected at the lower part. The output shaft of the motor is connected to a gear 9120. A rack 14 is provided at the bottom of the support frame 1, and the gear 9120 and the rack 14 are connected in a cooperative manner. The support frame 1 can install 2-4 sets of follow-up assemblies in parallel, each set can be controlled independently, and it is suitable for the segmented synchronous deployment and storage of ultra-long cables (>10m).

[0074] In addition, the equipment can operate continuously for 8 hours. The coil is a combination of thickened copper wire and silicon steel sheet, which does not generate heat and does not affect the demagnetization effect.

[0075] In addition, a foot cup is added to the bottom of the device, with an adjustment range of 100-200mm.

[0076] In addition, the equipment is placed in a pit, which facilitates the loading and unloading of large molds.

[0077] For any parts not mentioned in this invention, existing technologies can be used or referenced.

[0078] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in the present invention, and these should all be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A demagnetizing device for a bearing cage production mold, characterized in that, include: Support frame; The positioning platform is fixedly installed on the support frame and is used to support the production mold of the bearing cage to be demagnetized; The full-coverage dynamic demagnetization module includes a demagnetization coil assembly that can move linearly along the support frame. When the demagnetization coil assembly moves to the positioning platform, its magnetic field range can completely cover the geometric contour of the mold to be demagnetized. The demagnetizing control unit, electrically connected to the demagnetizing coil assembly and the demagnetizing power supply, is configured as follows: When the demagnetizing coil assembly moves to completely cover the mold, it triggers the demagnetizing power supply to output an alternating magnetic field with preset parameters. The alternating magnetic field has a constant amplitude and the magnetic field direction is periodically reversed. At the same time, when the demagnetizing coil assembly moves away from the mold to a preset distance, the demagnetizing current decays to zero, realizing demagnetization by a combination of mold moving away and decay. It also includes an adaptive cable control device, including a flexible cable and a cable attitude control mechanism. The flexible cable is used to establish an electrical connection between the demagnetizing coil assembly and the demagnetizing power supply. The cable attitude control mechanism can adjust the cable attitude during the movement of the demagnetizing coil assembly, maintain connection stability and prevent grounding wear. The cable attitude control mechanism includes a fall protection component, which is respectively installed in the preset mounting positions of the demagnetizing coil assembly housing and the demagnetizing power supply housing. The fall protection component partially fixes the cable segment near the connection position of the demagnetizing coil assembly and the demagnetizing power supply and keeps the cable between the connection position and the clamping part at a preset tension. When the demagnetizing coil assembly moves, the tension of the cable between the connection position and the fall protection component remains unchanged to prevent the connection position from being subjected to additional tension. It also includes a follow-up component, which is set in the middle area of ​​the cable between the two fall arrest components. The demagnetizing coil component can move during the movement of the cable, so that the cable is unfolded segment by segment. When the demagnetizing coil component is reset, the cable is retracted in an orderly manner, so that the lowest point of the cable has no contact wear with the ground. The follow-up component includes a movable frame, a sliding part at the bottom of the movable frame, the sliding part being connected to a movable guide rail on the side of the support frame, a clamping part at the top of the movable frame to clamp the cable, and a motor connected at the bottom. The output shaft of the motor is connected to a gear, and a rack is provided at the bottom of the support frame. The gear and rack are connected in a meshing manner.

2. The demagnetizing device for bearing cage production molds according to claim 1, characterized in that, The support frame includes upper and lower crossbeams that are parallel to each other and vertically corresponding. Connecting beams connect two upper crossbeams and two lower crossbeams to form vertically corresponding and parallel rectangular frames. Support beams are set at the four corners of the two opposing rectangular frames. A high-load-bearing positioning platform is set on the upper side of the upper rectangular frame. The demagnetizing coil assembly is set on the upper side of the lower rectangular frame, and the upper crossbeam passes through the central demagnetizing area of ​​the demagnetizing coil assembly.

3. The demagnetizing device for bearing cage production molds according to claim 2, characterized in that, The bottom of the demagnetizing coil assembly is provided with a slider, and the lower crossbeam is provided with a guide rail extending along its length. The slider is mounted on the guide rail. The bottom of the demagnetizing coil assembly is connected to the moving seat of the ball screw moving mechanism. The moving seat can move linearly with the screw. The screw is connected to a reduction motor. The action of the reduction motor causes the screw to rotate and drive the moving seat to move, thereby moving the demagnetizing coil assembly.

4. The demagnetizing device for bearing cage production molds according to claim 3, characterized in that, The lower crossbeam is equipped with a laser sensor, which corresponds to the demagnetizing coil assembly. The laser sensor measures the distance between itself and the demagnetizing coil assembly and transmits the distance to the controller. The controller controls the demagnetizing power supply to start or stop and controls the geared motor to rotate forward and backward based on the distance signal. The demagnetizing coil assembly and the support frame are equipped with safety light curtains to prevent the mold from hitting the demagnetizing coil due to irregular placement.

5. The demagnetizing device for bearing cage production molds according to claim 1, characterized in that, It also includes a control system that stores various workpiece demagnetization current parameters and allows for automated demagnetization by inputting the workpiece part number through a display screen.

6. The demagnetizing device for bearing cage production molds according to claim 1, characterized in that, The demagnetizing power supply is a three-phase full-wave DC ultra-low frequency demagnetizing power supply.

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