Brushless direct current stranding machine length control device and method based on mechanical guide rail

Abstract

The invention discloses a brushless direct-current stranding machine length control device based on a mechanical guide rail, and the device comprises a mechanical limiting guide rail assembly which comprises a guide rail main body, a fixed pedestal which is disposed below the guide rail and is used for fixing the guide rail main body, a graduated scale which is disposed along the length direction of the guide rail, a slidable limiting block, and a detachable fixed part. The limiting block is fixed to the preset position of the guide rail through a detachable fixing piece. The air cylinder clamping module comprises an air cylinder, a clamping jaw and a trigger device. The trigger device drives the air cylinder to close the clamping jaw so as to clamp a wire. The air cylinder clamping module is positioned through a limiting block; and the turn number control and shutdown control module comprises a counter and a linkage signal circuit, the counter is linked with a rotating shaft of the stranding machine, detects the turn number of the stranding machine, triggers the generator to be powered off and shut down when the turn number reaches a preset value, and synchronously controls the cylinder to reset and loosen the clamp. And the submillimeter positioning accuracy (the error is less than or equal to + / -1mm) of the wire rod processing length and the time sequence synchronization rate (the action synchronization error is less than or equal to 0.3 second) of the whole process action are realized.

Description

Technical Field

[0001] The present invention relates to the technical field of wire harness processing equipment, and in particular to industrial equipment that realizes stranded wire length and stranding accuracy through guide rail limiting mechanisms and electromechanical linkage control. Background Art

[0002] Traditional stranding machines have the following technical defects:

[0003] 1. Insufficient clamping stability: One end of the wire is manually fixed rather than mechanically fixed, which can easily cause the wire to deviate during processing, resulting in uneven twisting.

[0004] 2. Rough length control: Relying on manual visual inspection or experience, and one end of the wire is not mechanically fixed. The length after twisting is easily changed, with an error exceeding ±5mm, which cannot meet the requirements of standardized production.

[0005] 3. Unbalanced tension control: Since one end of the wire is fixed by a clamp and the other end is manually pinched and fixed, the overall tension of the wire is easily uneven during the twisting process;

[0006] 4. The operation process is cumbersome: a single operation requires multiple steps: measuring the wire length → clamping the wire → measuring the wire length again → manually pinching and straightening the wire → starting the equipment → visually stopping the machine → disassembling. Multiple measurements of wire length and limit adjustments are required, resulting in low production efficiency.

[0007] 5. Manual visual circle measurement causes shutdown delay (delay error is about 0.5-3 seconds).

[0008] 6. The existing clamping device is easy to damage the surface of the wire (surface indentation rate>15%).

[0009] 7. Lack of precise coordination between clamping force and shutdown timing.

[0010] The disclosure of the above background technology content is only used to assist in understanding the concept and technical solution of the present invention. It does not necessarily belong to the prior art of this patent application. In the absence of clear evidence that the above content has been disclosed on the filing date of this patent application, the above background technology should not be used to evaluate the novelty and creativity of this application. Summary of the Invention

[0011] The present invention proposes a brushless DC stranding machine length control device and method based on mechanical guide rails, which realizes multi-parameter coordination of strand length positioning accuracy, stranding start-up and clamping action timing error, and constant and controllable clamping force to meet the needs of standardized mass production.

[0012] In order to achieve the above object, the present invention adopts the following technical solutions:

[0013] A brushless DC stranding machine length control device based on mechanical guide rails, comprising: a mechanical limit guide rail assembly, comprising: a guide rail body, a fixed base installed under the guide rail for fixing the guide rail body, a scale ruler arranged along the length direction of the guide rail, a slidable limit block and a detachable fixing piece, wherein the limit block is fixed to a preset position of the guide rail by the detachable fixing piece; a cylinder clamping module: comprising: a cylinder, a clamping jaw and a trigger device, wherein the trigger device drives the cylinder to close the clamping jaw to clamp the wire; the cylinder clamping module is positioned by the limit block; a turn number control and shutdown control module, comprising: a counter and a linkage signal circuit, wherein the counter is linked to the stranding machine rotating shaft, detects the number of stranded turns and triggers the motor to power off and stop when the preset value is reached, and synchronously controls the cylinder to reset and release the clamp.

[0014] In some embodiments, the following technical features are also included:

[0015] The minimum division of the scale ruler is ≤1mm, and the limit block is provided with an indicator mark aligned with the ruler.

[0016] In some embodiments, the following technical features are also included:

[0017] The linkage signal circuit includes a relay module, and the relay controls the cylinder solenoid valve to switch the air circuit to achieve synchronization of the clamping action and the shutdown signal.

[0018] In some embodiments, the following technical features are also included:

[0019] The detachable fixing part includes a clamping jaw module and a hand-tightening bolt; the triggering device includes a foot pedal and a pneumatic pressure regulating valve. The foot pedal triggers the cylinder to close the clamping jaw, and the clamping force is preset to 50-100N through the pneumatic pressure regulating valve.

[0020] In some embodiments, the following technical features are also included:

[0021] The counter is coaxially mounted with the rotating shaft and triggers a counting signal every time the shaft rotates 360°.

[0022] In some embodiments, the following technical features are also included:

[0023] An anti-skid layer is provided on the inner side of the clamping jaw to prevent the wire from slipping.

[0024] In some embodiments, the following technical features are also included:

[0025] The contact surface of the cylinder clamping module is provided with a flexible buffer layer.

[0026] In some embodiments, the following technical features are also included:

[0027] A time delay control unit is included to ensure that the start of the motor has a preset delay time relative to the clamping action.

[0028] In some embodiments, the following technical features are also included:

[0029] The guide rail assembly is made of highly wear-resistant metal, and the moving parts are made of lightweight alloy materials; an anti-slip rubber pad is provided on the inside of the clamping jaw to prevent damage to the wire surface during clamping.

[0030] The present invention also adopts the following technical solutions:

[0031] A method for controlling the length of a stranding machine comprises the following steps: S1, setting a predetermined processing length on a guide rail with a scale by means of a slidable limit block; S2, triggering a cylinder clamping module to fix the wire with a preset pressure; S3, driving a rotating shaft after a preset delay after completing the clamping action; S4, detecting the state of the rotational motion in real time by means of a counter and a linkage signal circuit; S5, when the detected value reaches a set threshold, synchronously triggering the motor to stop and the cylinder to reset and release the clamp.

[0032] In some embodiments, the following technical features are also included:

[0033] The preset delay of step S3 is adjustable within a range of 0.5-2 seconds.

[0034] In some embodiments, the following technical features are also included:

[0035] After step S5 is executed, the counter is automatically reset and the system enters the standby cycle state.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] The present invention adopts a brushless DC stranding machine device with a mechanical guide rail and a basic length control system, and realizes stable control of the strand length and path through mechanical limiting. The cylinder clamping module is linked with the foot pedal to reduce manual intervention and improve production efficiency. Through the coordinated use of the scale ruler and the slidable limit block of the mechanical limit guide rail assembly, combined with the voltage regulation control of the cylinder clamping module and the synchronous shutdown design of the number of turns control, the sub-millimeter positioning accuracy of the wire processing length (error ≤ ± 1mm) and the timing synchronization rate of the full process action (action synchronization error ≤ 0.3 seconds) are achieved. It utilizes the mechanical principle of spatial precision locking, the electrical principle of the time relay delaying the stranding start and the clamping action timing synchronization, and the mechanical principle of the pneumatic pressure regulating valve being preset to the clamping force independent of manual experience, to achieve:

[0038] 1. Improved length control accuracy: The positioning error of the manual limit block meets general industrial requirements (in the embodiment, it can reach ≤±1mm);

[0039] 2. Enhanced operational convenience: The scale ruler intuitively displays the length, and the time required to adjust the limit block in the embodiment is reduced by 60%;

[0040] 3. Optimized clamping efficiency: The foot pedal completes clamping and starting with one click, and the cylinder-assisted clamping module reduces the intensity of manual operation. In the embodiment, the production cycle is increased by 40%.

[0041] 4. Automatic clamping: the clamping jaws are released synchronously with the shutdown signal, reducing manual intervention;

[0042] In some embodiments, the present invention also has the following beneficial effects:

[0043] Enhanced stability: Highly wear-resistant metal guide rails and lightweight moving parts (such as aluminum alloy limit blocks) are used to ensure long-term use without deformation.

[0044] Anti-slip rubber pads prevent cable damage.

[0045] Delayed start control prevents the motor from starting before clamping is complete.

[0046] The cylinder clamping force is coordinated with the counter to improve the yield rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 : Schematic diagram of the mechanical guide rail assembly (including scale, fixed base, and slidable limit block);

[0048] Figure 2 : Cylinder clamping module and linkage circuit structure diagram;

[0049] Figure 3 : Schematic diagram of the control circuit (including the linkage relationship between the time relay and the counter);

[0050] Figure 4 : Schematic diagram of the overall structure.

[0051] The description of the accompanying drawings is as follows:

[0052] 1: Mechanical limit guide rail, 2: Cylinder clamping and limit mechanism, 10: Scale ruler, 11: Fixed base, 12: Guide rail, 20: Anti-slip rubber gasket, 21: Clamping claw, 22: Double-acting cylinder, 23: Sliding limit block, 24: Hand-tightening bolt, FU: Fuse, FR: Thermal relay, SB2: Foot pedal switch, KC: Mechanical counter, KA: Intermediate relay, KT: Time relay, KM: Motor controller, Y1: Cylinder solenoid valve clamping end, Y2: Cylinder solenoid valve loosening end, QF: Circuit breaker. DETAILED DESCRIPTION

[0053] The following is a detailed description of the embodiments of the present invention. It should be emphasized that the following description is only exemplary and is not intended to limit the scope of the present invention and its application.

[0054] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element. In addition, the term "connected" can be used for both fixing and circuit / signal communication.

[0055] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0056] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0057] Traditional equipment has decoupling of the three major systems of mechanical positioning, electrical timing, and clamping force control, resulting in:

[0058] Length error>±5mm (mechanical and electrical separation);

[0059] There are many manual intervention links (failure of timing coordination);

[0060] Unable to meet standardized mass production (system out of control);

[0061] To this end, the core of the following embodiments of the present invention lies in the following design:

[0062] 1. Mechanical limit guide rail assembly:

[0063] Sliding limit block: The guide rail body is made of stainless steel, and a scale is set along the length of the guide rail, with a minimum division of 1mm;

[0064] Manual locking mechanism: The limit block is fixed to the preset position of the guide rail (such as 100mm, 150mm) by hand-tightening bolts, with a positioning accuracy of ±1mm;

[0065] 2. Cylinder clamping module:

[0066] Foot pedal trigger clamping: Hold the wire and straighten it so that it passes through the cylinder clamping jaws. Press the foot pedal to drive the double-acting cylinder to close the clamping jaws. The clamping force is preset by the pressure regulating valve (50-100N), ensuring that the wire is fixed during the stranding process without being crushed.

[0067] Loosening and clamping linkage design: the clamping force is preset by the pneumatic pressure regulating valve (50-100N), and the loosening action is linked with the stop signal. After the stranding is completed, the cylinder resets and the clamping jaws automatically release the wire.

[0068] 3. According to the linkage logic (pedal triggers clamping → delayed start of motor and counting → stop and release clamp when counting reaches the target), the circuit is designed as follows:

[0069] Initial state (pedal not pressed):

[0070] The foot pedal switch (SB2) is disconnected → the time relay (KT) is not energized → the KT contacts are disconnected, and the motor and the rotating shaft are stationary;

[0071] The cylinder solenoid valve (Y1) loses power → the cylinder is in the unclamped state;

[0072] The normally closed contact of the mechanical counter (KC) is closed, but there is no signal input.

[0073] Press the foot pedal to trigger the clamping:

[0074] The foot pedal switch (SB2) is closed → the time relay (KT) coil is energized and timing begins (1s delay);

[0075] The coil of the intermediate relay (KA) is energized → its contacts are closed, the cylinder solenoid valve (Y1) is energized → the double-acting cylinder is supplied with air, and the clamping jaws close to clamp the wire (the clamping force is preset by the pressure regulating valve);

[0076] The contacts of the intermediate relay (KA) remain closed to ensure that the cylinder remains clamped after the foot pedal is released (to prevent accidental loosening).

[0077] Delayed start of motor and count:

[0078] After the time relay (KT) times for 1 second, the KT delayed closing contact closes → the motor controller (KM) receives the start signal and the brushless DC motor begins to rotate;

[0079] Every time the stranding machine clamp rotates 360°, the internal gear of the mechanical counter (KC) counts (the display shows the number of revolutions).

[0080] The count reaches the target and triggers the machine to stop and release the clamp:

[0081] When the mechanical counter accumulates to the preset number of turns, the internal mechanical structure moves → the normally closed contact, and the mechanical counter contact (KC) is disconnected;

[0082] The time relay (KT) coil loses power → the motor controller (KM) has no signal input, and the stranding machine clamp stops rotating;

[0083] The mechanical counter contact (KC) is disconnected → the intermediate relay (KA) coil loses power → its contacts switch, the cylinder solenoid valve clamping terminal (Y2) is energized → the double-acting cylinder is exhausted, and the clamp releases the wire;

[0084] The operator takes out the finished product, and the mechanical counter automatically resets (KC contacts reclose) and enters the next cycle.

[0085] Example 1

[0086] This embodiment is a brushless DC stranding machine length control device based on a mechanical guide rail, comprising:

[0087] Mechanical limit rail assembly: includes a rail body, a fixed base installed under the rail for fixing the rail body, a scale set along the length of the rail, a slidable limit block and a detachable fixing piece. The limit block is fixed to a preset position on the rail by a detachable fixing piece to achieve positioning of the wire clamping end;

[0088] Cylinder clamping module: includes a cylinder, a clamping jaw and a trigger device. The trigger device drives the cylinder to close the clamping jaw to clamp the wire. The clamping force is preset by the pressure regulating device.

[0089] Turn number control and shutdown control module: includes a counter and a linkage signal circuit. The counter is linked to the twisting machine's rotating shaft to detect the number of twisted turns and trigger the motor to power off and stop when the preset value is reached, and synchronously control the cylinder to reset and release the clamp.

[0090] The minimum division of the scale ruler is ≤1mm, and the limit block is provided with an indicator mark aligned with the ruler.

[0091] The linkage signal circuit includes a relay module, and the relay controls the cylinder solenoid valve to switch the air circuit to achieve synchronization of the clamping action and the shutdown signal.

[0092] The detachable fixing part includes a clamping jaw module and a hand-tightening bolt; the triggering device includes a foot pedal and a pneumatic pressure regulating valve. The foot pedal triggers the cylinder to close the clamping jaw, and the clamping force is preset to 50-100N through the pneumatic pressure regulating valve.

[0093] The counter is coaxially mounted with the rotating shaft and triggers a counting signal every time the shaft rotates 360°.

[0094] An anti-skid layer is provided on the inner side of the clamping jaw to prevent the wire from slipping.

[0095] The contact surface of the cylinder clamping module is provided with a flexible buffer layer.

[0096] A time delay control unit is included to ensure that the start of the motor has a preset delay time relative to the clamping action.

[0097] The guide rail assembly is made of highly wear-resistant metal, and the moving parts are made of lightweight alloy materials; an anti-slip rubber pad is provided on the inside of the clamping jaw to prevent damage to the wire surface during clamping.

[0098] The length control method of the stranding machine of this embodiment includes the following steps: S1. Setting a predetermined processing length on a guide rail with a scale through a slidable limit block; S2. Triggering the cylinder clamping module to fix the wire with a preset pressure; S3. After completing the clamping action and after a preset delay, driving the rotating shaft; S4. Real-time detection of the rotational motion state through a counter and a linkage signal circuit; S5. When the detection value reaches the set threshold, synchronously triggering the motor to stop and the cylinder to reset and release the clamp.

[0099] The preset delay of step S3 is adjustable within a range of 0.5-2 seconds.

[0100] After step S5 is executed, the counter is automatically reset and the system enters the standby cycle state.

[0101] Example 2

[0102] Specifically, the mechanical limit rail assembly of this embodiment includes: a stainless steel rail body (providing high strength and wear resistance), a fixed base installed below the rail to fix the rail body, a scale set along the length of the rail, a slidable limit block and a clamping claw module, and a hand-tightening bolt. The limit block is fixed to a preset position on the rail by a hand-tightening bolt, with a positioning accuracy of ±1mm.

[0103] The cylinder clamping module includes a double-acting cylinder, a clamping jaw, a foot pedal, and a pneumatic pressure regulating valve. The foot pedal triggers the cylinder to close the clamping jaw, and the clamping force is preset to 50-100N by the pressure regulating valve.

[0104] The turn count control and shutdown module is a pre-set turn count start and stop control module, including a mechanical counter and linkage signal circuit. The mechanical counter is installed at the end of the stranding machine's rotating shaft (coaxial with the stranding machine clamp). Its counting trigger end is linked to the rotating shaft (triggering a count every 360° of rotation), and the display screen is exposed on the stranding machine operation panel (function: real-time display of the number of stranded turns). When the preset number of turns is reached, the counter triggers the motor to shut down and simultaneously sends a signal to the cylinder to reset and release the clamp.

[0105] The minimum division of the scale ruler is 1mm. The surface of the limit block is provided with an indicator mark aligned with the ruler, which is used to intuitively set the stranded wire length; the 0 scale line of the guide rail scale ruler is flush with the surface of the limit block, and the clamping claw is flush with the surface of the limit block. At this time, the distance between the 0 scale line and the limit block is the stranded wire length. By sliding the limit block, the indicator mark is aligned with the target scale of the ruler (such as 150mm). At this time, the distance between the clamping claw and the stranding machine clamp is the stranded wire length (150mm). One end of the wire is clamped by the stranding machine clamp (corresponding to the 0 point of the ruler), and the other end is clamped by the limit block clamping claw (corresponding to the target scale point of the ruler). After the wire is straightened, it is parallel to the length direction of the guide rail to ensure that the measured length is the actual stranded length.

[0106] The loosening action of the cylinder clamping module is linked to the shutdown signal, which triggers the cylinder to reset after shutdown;

[0107] The linkage signal circuit includes a relay module, which controls the cylinder solenoid valve to switch the air path to complete the clamping after receiving the power-off signal.

[0108] There is an anti-slip rubber pad on the inside of the clamping jaws to prevent damage to the wire surface when clamping.

[0109] A twister clamp is installed at the end of the brushless DC motor's rotating shaft to hold one end of the wire. The motor's control circuit is linked to the pedal signal from the cylinder clamping module, and a time relay is used to provide a 1-second start delay. This ensures that the cylinder is fully clamped before twisting begins.

[0110] The stranding machine clamp is installed at the end of the rotating shaft, clamping one end of the wire and rotating synchronously with the rotating shaft; the cylinder clamping module is installed in combination with the slidable limit block to clamp the other end of the wire and keep it fixed; the motor provides rotational power, and the rotating shaft transmits torque to the stranding machine clamp;

[0111] The guide rails are made of stainless steel (for better wear resistance), while the limit blocks and cylinder housings are coated with aluminum alloy to reduce the overall weight.

[0112] Taking the stranded length of 150mm electronic wire as an example, after operating the stranding machine to set the number of strands, the following process is carried out:

[0113] 1. Length setting: Slide the limit block along the scale to the 150mm position and tighten the thumb bolts to secure;

[0114] 2. Wire fixing: Hold the wire through the cylinder clamp and step on the foot pedal to trigger the cylinder to clamp;

[0115] 3. Start twisting the wire: After the cylinder is clamped, there is a delay of about 1 second, and the brushless DC motor starts to drive the wire clamp to rotate the wire;

[0116] 4. Automatic shutdown: When the stranding machine counter accumulates to the set number of turns, the electromagnetic clutch is powered off and shut down, and the cylinder is triggered to release the clamp;

[0117] 5. Reclaiming cycle: The operator takes out the finished product and puts in new wire to enter the next cycle.

[0118] Example 3

[0119] More specifically, if Figure 1 、 2 As shown, the mechanical limit guide rail assembly of this embodiment includes a guide rail body 1, a fixed base 11 installed under the guide rail for fixing the guide rail body, a scale ruler 10 arranged along the length direction of the guide rail, a slidable limit block 23 and a detachable fixing part. The limit block is fixed to the preset position of the guide rail by the detachable fixing part to realize the positioning of the wire clamping end; the cylinder clamping module includes a cylinder, a clamping jaw and a trigger device, the trigger device drives the cylinder to close the clamping jaw to clamp the wire, and the clamping force is preset by the voltage regulating device; the number of turns control and shutdown control module includes a counter and a linkage signal circuit, the counter is linked to the rotating shaft of the stranding machine, detects the number of stranding turns and triggers the motor to power off and stop when the preset value is reached, and synchronously controls the cylinder to reset and release the clamp.

[0120] The guide rail body 1 is made of SUS304 stainless steel (supplier: Baosteel, dimensions 1200×50×30mm, tolerance ±0.1mm, hardness HRC58-60); the removable fixings are M8 thumb screws (model: FH-M8-316); the clamping force is preset to 80±5N via an SMC pneumatic pressure regulating valve (model: AR20-03BG), and the limit blocks are made of 6061-T6 aluminum alloy.

[0121] The circuit of this embodiment is as follows Figure 3 As shown in the figure, fuse FU1 and thermal relay FR provide dual overload and short-circuit protection, ensuring safe operation of the equipment. Start button SB2 controls cylinder clamping terminal Y1 via intermediate relay KA, closing the cylinder jaws. Start button SB2 controls motor KM via time relay KT. When the preset number of revolutions is reached, KC opens, de-energizing time relay KT and stopping motor KM. KC disconnects, de-energizing intermediate relay KA, energizing cylinder opening terminal Y2 and opening the jaws. The linkage signal circuit uses an Omron relay (model: MY4NJ, control voltage 24VDC).

[0122] This embodiment as a whole is as follows Figure 4 Its working principle is as follows:

[0123] After receiving the counter signal, the relay switches the solenoid valve air path (intake → exhaust).

[0124] The steps for using the brushless DC stranding machine length control device based on the mechanical guide rail in this embodiment are as follows:

[0125] 1. Slide the limit block to the target position of the ruler (such as 150mm) and tighten the thumb bolts;

[0126] 2. Press the foot pedal to trigger the clamp to close, and start the motor after the wire is straightened;

[0127] 3. When the counter detects that the number of circles reaches the standard, the motor will be stopped and the cylinder will be released synchronously.

[0128] Technical verification:

[0129] Test items Example 3 Comparative example (without guide rail) Improvement rate Length error (mm) ±1.0 ±5.2 80％↑ Single operation time (s) 15 25 40％↓

[0130] Wear resistance test: After 10,000 sliding tests, the guide rail wear is ≤0.05mm.

[0131] Example 4

[0132] Based on Example 3, this example adopts the following variations:

[0133] Guide rail assembly: SUS316L stainless steel guide rail (purchased from Shanghai Baosteel, size: length 1200±0.5mm×width 50±0.2mm)

[0134] Clamping module: SMC CDU32-40D double-acting cylinder (clamping force 50±5N~100±5N adjustable)

[0135] Turn control: Omron H7EC-NB mechanical counter (detection accuracy: ±0.5 turn)

[0136] Effect verification:

[0137] Test items Comparative example (without guide rail) Example 4 Improvement rate Length deviation (mm) ±5.8 ±0.9 84.5％ Single operation time (s) 18.7 11.2 40.1％

[0138] The background section of the present invention may contain background information about the problem or environment of the present invention rather than describing prior art by others. Therefore, the inclusion of content in the background section is not an admission by the applicant that the prior art is available.

[0139] The above description further details the present invention in conjunction with specific / preferred embodiments, and the specific implementation of the present invention should not be construed as being limited to these descriptions. Persons skilled in the art will appreciate that, without departing from the spirit of the present invention, they may make various substitutions or modifications to the described embodiments, and these substitutions or modifications should be considered to fall within the scope of protection of the present invention. Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "preferred embodiments," "examples," "specific examples," or "some examples" indicates that the specific features, structures, materials, or characteristics described in conjunction with such embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine and assemble the different embodiments or examples described in this specification, as well as features from different embodiments or examples, without conflicting opinions. Although the embodiments of the present invention and their advantages have been described in detail, it should be understood that various changes, substitutions, and modifications may be made herein without departing from the scope of the appended claims.

Claims

1. A brushless DC stranding machine length control device based on a mechanical guide rail, characterized in that: include: The mechanical limit rail assembly includes: a rail body, a fixed base installed below the rail for fixing the rail body, a scale provided along the length of the rail, a slidable limit block and a detachable fixing member, wherein the limit block is fixed to a preset position of the rail by the detachable fixing member; Cylinder clamping module: includes: a cylinder, a clamping jaw and a trigger device, the trigger device drives the cylinder to close the clamping jaw to clamp the wire; the cylinder clamping module is positioned by the limit block; The coil number control and shutdown control module includes: a counter and a linkage signal circuit. The counter is linked to the stranding machine rotating shaft to detect the number of coils and trigger the motor to power off and stop when the preset value is reached, and synchronously control the cylinder to reset and release the clamp.

2. The device according to claim 1, characterized in that: The minimum division of the scale ruler is ≤1mm, and the limit block is provided with an indicator mark aligned with the ruler.

3. The device according to claim 1, characterized in that: The linkage signal circuit includes a relay module, and the relay controls the cylinder solenoid valve to switch the air circuit to achieve synchronization of the clamping action and the shutdown signal.

4. The device according to claim 1, characterized in that: The detachable fixing part includes a clamping jaw module and a hand-tightening bolt; the triggering device includes a foot pedal and a pneumatic pressure regulating valve. The foot pedal triggers the cylinder to close the clamping jaw, and the clamping force is preset to 50-100N through the pneumatic pressure regulating valve.

5. The device according to claim 1, characterized in that: The counter is installed coaxially with the rotating shaft and triggers a counting signal every 360° rotation; an anti-slip layer is provided on the inner side of the clamping jaw to prevent the wire from slipping; and a flexible buffer layer is provided on the contact surface of the cylinder clamping module.

6. The device according to claim 1, characterized in that: A time delay control unit is included to ensure that the start of the motor has a preset delay time relative to the clamping action.

7. The device according to claim 1, characterized in that: The guide rail assembly is made of highly wear-resistant metal, and the moving parts are made of lightweight alloy materials; an anti-slip rubber pad is provided on the inside of the clamping jaw to prevent damage to the wire surface during clamping.

8. A method for controlling the length of a stranding machine, characterized in that The following steps are involved: S1. Set the predetermined processing length on the guide rail with a scale using a slidable stopper; S2. Trigger the cylinder clamping module to secure the wire with a preset pressure; S3. After completing the clamping action and after a preset delay, drive the rotating shaft; S4. Detect the rotational motion status in real time using a counter and linkage signal circuit; S5. When the detection value reaches the set threshold, the motor is synchronously triggered to stop and the cylinder is reset to release the clamp.

9. The method according to claim 8, characterized in that: The preset delay of step S3 is adjustable within a range of 0.5-2 seconds.

10. The method according to claim 8, characterized in that: After step S5 is executed, the counter is automatically reset and the system enters the standby cycle state.

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