Aviation cable stranding machine and control method thereof

Abstract

The invention discloses an aviation cable stranding machine and a control method thereof.The aviation cable stranding machine comprises a pay-off rack, a wire collecting barrel, a wire guiding plate, a wire distributing plate, a rotating main shaft and a wire doubling mold, and a first wire stabilizing mechanism and a second wire stabilizing mechanism are sequentially arranged between the pay-off rack and the wire guiding plate in the cable transmission direction; the first wire stabilizing mechanism comprises a stabilizing cylinder coaxial with a cable transmission axis, an airflow nozzle, an airflow adjusting valve and an air source, the airflow nozzle is arranged on the stabilizing cylinder and connected with the air source through an air pipe, the airflow adjusting valve is arranged on the air pipe, the second wire stabilizing mechanism comprises two U-shaped magnetic cores with opposite openings, and magnet exciting coils are arranged on iron cores of the U-shaped magnetic cores. The magnet exciting coil is connected with an adjustable power supply, and a metal damping ring is arranged on the inner sides of the two U-shaped magnetic cores. The first wire stabilizing mechanism and the second wire stabilizing mechanism are arranged and matched with the tension sensor on the pay-off rack, so that the problem that the quality of stranded wires is reduced due to the fact that the cables are prone to vibration and jumping in the pay-off process is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cable production, in particular to an aviation cable stranding machine and a control method thereof. BACKGROUND

[0002] As the core component of power transmission and signal interaction in aerospace equipment, the performance of aviation cable directly determines the reliability and safety of the aviation equipment. In the production process of aviation cable, the stranding machine is the core equipment for realizing the stranding of multiple single cables, and the cable transmission stability directly affects the quality of the final product.

[0003] At present, various stranding machine structures have been developed in the cable manufacturing field to adapt to the production needs of different cables. For example, a cable and wire stranding machine is disclosed in Chinese patent publication No. CN111696726A, which realizes cable guiding and stranding through structures such as rotating rollers, twisting discs, and wire guides. The twisting disc is provided with a lead cavity and a deviation prevention mechanism, and only relies on mechanical guide wheels for cable limiting; a multi-disc stranding machine is disclosed in Chinese patent publication No. CN103050193B, which sets up a tension control device on the pay-off stand to adjust the tension of each stranding, but only realizes static tension value control by changing the pay-off resistance; a cable stranding machine is disclosed in Chinese patent publication No. CN119541955B, which guides cable transmission through fixed wheels, movable wheels, and stabilizing frames to prevent cable splashing after breaking, but its wire stabilizing method still relies on mechanical contact limiting.

[0004] However, the above-mentioned existing stranding machines still have the following difficult-to-overcome technical defects when adapting to aviation cable production. High-frequency vibration and radial jumping may occur due to pay-off tension fluctuation, air flow interference, or deviation of guide wheel surface precision during high-speed pay-off. The existing stranding machines only rely on the mechanical guide wheels of the lead cavity of the twisting disc and the wire guide for limiting, and the vibrating cable is prone to severe friction with equipment components (such as the inner wall of the twisting disc and the edge of the wire distribution plate hole), resulting in deviation of the centering accuracy during stranding, and further leading to uneven stranding pitch, which cannot meet the stringent requirements of the aviation field on cables. SUMMARY

[0005] The present application aims to overcome the shortcomings of the prior art and provide an aviation cable stranding machine and a control method thereof, which aims to solve the problem of cable vibration and jumping during the pay-off process of the existing aviation cable stranding machine, leading to a decrease in stranding quality.

[0006] To achieve the above-mentioned purpose, the present application adopts the following technical solutions: In one aspect, the present application provides an aviation cable stranding machine, comprising a pay-off rack, a collecting drum, a guide plate, a dividing plate, a rotating main shaft and a combining die, the pay-off rack, the guide plate, the dividing plate and the combining die are coaxially and spacedly arranged in sequence along the cable transmission direction, the pay-off rack, the guide plate and the dividing plate are fixed on the rotating main shaft and rotate with it, the collecting drum is arranged on the pay-off rack, a tension sensor is arranged on the pay-off rack, a first stabilizing mechanism and a second stabilizing mechanism are arranged in sequence between the pay-off rack and the guide plate along the cable transmission direction, the first stabilizing mechanism comprises a stabilizing cylinder coaxial with the cable transmission axis, an airflow nozzle, an airflow adjusting valve and an air source, the airflow nozzle is arranged on the stabilizing cylinder, the airflow nozzle is connected with the air source through an air pipe, the airflow adjusting valve is arranged on the air pipe, the second stabilizing mechanism comprises two U-shaped magnetic cores with opposite openings, an excitation coil is arranged on the core of the U-shaped magnetic core, the excitation coil is connected with an adjustable power supply, a metal damping ring is arranged on the inner side of the two U-shaped magnetic cores.

[0007] Further, the stabilizing cylinder is provided with a plurality of nozzle mounting holes, the plurality of nozzle mounting holes are distributed in an array along the inner wall circumference of the stabilizing cylinder, the airflow nozzles are mounted in the nozzle mounting holes, and the jet directions of the airflow nozzles are towards the cable.

[0008] Further, the airflow nozzles are arranged at an angle with the cable surface, and all the airflow nozzles are inclined clockwise or counterclockwise along the cable transmission direction.

[0009] Further, the inner wall of the stabilizing cylinder is provided with a plurality of spiral airflow deflectors, each of the airflow deflectors extends along the circumferential direction of the inner wall of the stabilizing cylinder, and the airflow deflectors are arranged staggered with the airflow nozzles.

[0010] Further, the inner wall of the metal damping ring is provided with a ceramic protrusion, the ceramic protrusion is in a semispherical shape.

[0011] Further, an elastic connecting piece is arranged between the outer side of the metal damping ring and the inner side of the U-shaped magnetic core, the elastic connecting piece has at least a first end and a second end arranged oppositely, the first end of the elastic connecting piece is fixedly connected with the inner side of the U-shaped magnetic core, and the second end of the elastic connecting piece is fixedly connected with the outer side of the metal damping ring.

[0012] Further, the flexible clamping mechanism comprises a fixed seat, a fixed clamping block, a movable clamping block and a clamping cylinder, the fixed seat is provided with a guide cavity, the fixed clamping block and the movable clamping block are oppositely arranged in the guide cavity, and the movable clamping block is located above the fixed clamping block, one side of the fixed clamping block and the movable clamping block opposite to each other is provided with a fixed arc-shaped groove, one side of the movable clamping block opposite to the fixed clamping block is provided with a movable arc-shaped groove, the groove wall of the fixed arc-shaped groove and / or the movable arc-shaped groove is provided with an elastic pad, a plurality of pressure sensors are arranged in the elastic pad, the pressure sensors are used for detecting the contact pressure between the elastic pad and the cable, the fixed arc-shaped groove and the movable arc-shaped groove are combined to form a clamping limiting hole through which the cable can pass, and the piston rod of the clamping cylinder is connected with the movable clamping block to drive the movable clamping block to move.

[0013] Further, the flexible clamping mechanism further comprises a linear motion module, the linear motion module is connected with the fixed seat, and the linear motion module is used for driving the fixed seat to move along the axis direction of the rotating main shaft.

[0014] In another aspect, the present application also provides a control method of the aviation cable stranding machine, comprising: detecting the cable laying tension and the tension fluctuation frequency in real time through the tension sensor; if the laying tension is detected to increase, the airflow of the airflow nozzle is increased, and if the laying tension is detected to decrease, the airflow of the airflow nozzle is decreased; if the tension fluctuation frequency is detected to increase, the output current of the adjustable power supply is increased, and if the tension fluctuation frequency is detected to decrease, the output current of the adjustable power supply is decreased.

[0015] Further, the present application further comprises: detecting the contact pressure between the elastic pad and the cable in real time through the pressure detector; if the contact pressure between the elastic pad and the cable is detected to be less than the minimum threshold value, the extending distance of the piston rod of the clamping cylinder to the cable is controlled.

[0016] The beneficial effect of the present application compared with the prior art is that the aviation cable stranding machine comprises a pay-off rack, a cable collecting drum, a guide plate, a cable dividing plate, a rotating main shaft and a parallel cable die, the pay-off rack, the guide plate, the cable dividing plate and the parallel cable die are coaxially and spaced apart in sequence along the cable transmission direction, the pay-off rack, the guide plate and the cable dividing plate are fixed on the rotating main shaft and rotate with the rotating main shaft, the cable collecting drum is arranged on the pay-off rack, the pay-off rack is provided with a tension sensor, and the pay-off rack and the guide plate are provided with a first cable stabilizing mechanism and a second cable stabilizing mechanism in sequence along the cable transmission direction, the first cable stabilizing mechanism comprises a stabilizing cylinder coaxial with the cable transmission axis, an airflow nozzle, an airflow adjusting valve and an air source, the airflow nozzle is arranged on the stabilizing cylinder, the airflow nozzle is connected with the air source through an air pipe, and the airflow adjusting valve is arranged on the air pipe, the second cable stabilizing mechanism comprises two U-shaped magnetic cores with opposite openings, an excitation coil is arranged on the core of the U-shaped magnetic core, the excitation coil is connected with an adjustable power supply, and the inner sides of the two U-shaped magnetic cores are provided with a metal damping ring, the first cable stabilizing mechanism and the second cable stabilizing mechanism are arranged, and the tension sensor on the pay-off rack is matched, the airflow size is adjusted in real time according to the pay-off tension detected by the tension sensor, the flexible wrapping force of the airflow on the cable is used to suppress the radial deviation caused by the tension change, the tension fluctuation frequency detected by the tension sensor is used to adjust the excitation coil current through the adjustable power supply to change the magnetic field strength, and then the eddy current damping force of the metal damping ring on the cable is adjusted, the vibration and jumping of the cable under high-speed movement when reaching the stranding position are effectively suppressed, and the first cable stabilizing mechanism and the second cable stabilizing mechanism do not directly contact the cable, so that the friction on the cable is reduced to a certain extent.

[0017] The above description is only a summary of the technical scheme of the present application, in order to more clearly understand the technical means of the present application, the content of the specification can be implemented, and in order to make the above and other purpose characteristics and advantages of the present application more obvious and easy to understand, the following preferred embodiments are described in detail as follows. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creating laborious work.

[0019] Figure 1 A structure schematic diagram of an aviation cable stranding machine provided by a specific embodiment of the present application is shown in the figure. Figure 2 A structure schematic diagram of a first cable stabilizing mechanism of an aviation cable stranding machine provided by a specific embodiment of the present application is shown in the figure. Figure 3 An exploded view of a first cable stabilizing mechanism of an aviation cable stranding machine provided by a specific embodiment of the present application is shown in the figure. Figure 4 A structure schematic view of a stabilizing cylinder of an aviation cable stranding machine is provided for a specific embodiment of the present application; Figure 5 An installation schematic view of a second wire stabilizing mechanism of an aviation cable stranding machine is provided for a specific embodiment of the present application; Figure 6 A structure schematic view of a second wire stabilizing mechanism of an aviation cable stranding machine is provided for a specific embodiment of the present application; Reference signs: 1, a wire rack; 11, a wire collecting cylinder; 12, a rack plate; 2, a wire guide plate; 21, a wire guide wheel; 3, a wire dividing plate; 31, a wire dividing hole; 4, a rotating main shaft; 5, a wire combining die; 6, a main shaft driving motor; 7, a first wire stabilizing mechanism; 71, an air source; 72, an air pipe; 73, an air flow adjusting valve; 74, a mounting sleeve; 741, a sleeve opening; 742, a mounting hole; 75, a stabilizing cylinder; 751, a cylinder center hole; 752, a nozzle mounting hole; 8, a second wire stabilizing mechanism; 81, a mounting disc; 811, a wire passing hole; 812, a disc sleeve opening; 82, a U-shaped magnetic core; 83, an excitation coil; 84, a metal damping ring; 100, a stranded wire. DETAILED DESCRIPTION

[0020] The technical solutions of the present application will be described clearly and completely below in combination with specific embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0021] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms “center”, “longitudinal”, “transverse”, “length”, “width”, “thickness”, “upper”, “lower”, “front”, “rear”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential” are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0022] In addition, the terms “first” and “second” are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with “first” and “second” can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of “a plurality of” is at least two, such as two, three, etc., unless otherwise specifically limited.

[0023] In the present application, unless specifically defined and limited otherwise, the terms "mounting", "connected", "connection", "fixed", and the like, should be construed broadly and are used in connection with what is claimed as being a means for providing a desired function along with structural contributions, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium, it can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0024] In the present application, unless specifically defined and limited otherwise, the first feature is "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0025] It should be noted that when an element is referred to as "fixed to" or "provided on" another element, it can be directly on another element or there can be a middle element. When an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and are not the only implementation.

[0026] The embodiment of the present application provides an aviation cable stranding machine, which is mainly applied to the production of aviation cables in the aviation field. It should be noted that the cable needs to pass through a multi-stage processing flow of primary stranding, secondary stranding and composite stranding of single wires, and finally forms a finished cable with a diameter meeting the design requirements. For the sake of description, a single cable is referred to as a single wire, and a wire after stranding of multiple single wires is referred to as a stranded wire.

[0027] In actual production, multiple aviation cable stranding machines are linearly arranged to form a multi-stage stranding system, a primary stranding machine strands multiple single wires to form a secondary stranded wire 100, and a secondary stranding machine strands the secondary stranded wire 100 with new multiple single wires, gradually increases the cable diameter through multi-stage stranding, and finally obtains a finished cable meeting the standard.

[0028] As Figures 1 to 6As shown, the embodiment of the present application provides an aviation cable stranding machine, which comprises a controller, a frame plate 12, a pay-off stand 1, a collecting drum 11, a guide plate 2, a separating plate 3, a rotating main shaft 4 and a parallel line die 5. The pay-off stand 1, the guide plate 2, the separating plate 3 and the parallel line die 5 are coaxially and spaced apart in sequence along the cable transmission direction. The rotating main shaft 4 is installed on the two oppositely arranged frame plates 12. The rotating main shaft 4 is driven by a main shaft driving motor 6, and the rotating speed can be adjusted according to the cable stranding pitch requirement. The rotating main shaft 4 has a hollow structure, and the stranding wire 100 passes through the hollow structure of the rotating main shaft 4. The pay-off stand 1, the guide plate 2 and the separating plate 3 are fixed on the rotating main shaft 4 by key connection and rotate with the rotating main shaft 4. The collecting drum 11 is used for winding the single wire to be processed. The collecting drum 11 is detachably installed on the pay-off stand 1 by bolts and can rotate relative to the pay-off stand 1 to pay off the wire.

[0029] The parallel line die 5 has a stranding hole with a diameter matched with that of the target stranding wire 100 in the center, which is used for restraining the multiple single wires into a preset stranding mode with the stranding wire 100. The parallel line die 5 belongs to the prior art, and will not be described in detail here.

[0030] The tension sensor is fixed on the single wire output end of the pay-off stand 1 by a support. The detection end of the tension sensor is attached to the surface of the single wire to collect the pay-off tension and tension fluctuation frequency in the single wire transmission process in real time, and transmit the detection signal to the controller (not shown in the figure) of the stranding machine to provide a basis for the adjustment of the first wire stabilizing mechanism 7 and the second wire stabilizing mechanism 8.

[0031] In order to solve the vibration problem of the single wire during high-speed transmission, the first wire stabilizing mechanism 7 and the second wire stabilizing mechanism 8 are sequentially arranged between the pay-off stand 1 and the guide plate 2 along the single wire transmission direction. The first wire stabilizing mechanism 7 wraps and limits the single wire by flexible airflow to suppress the radial deviation caused by tension change. The second wire stabilizing mechanism 8 attenuates the high-frequency vibration of the single wire by electromagnetic damping effect, and the two mechanisms cooperate to ensure that the single wire enters the subsequent stranding process in a stable state.

[0032] Specifically, the first wire stabilizing mechanism 7 comprises a stabilizing cylinder 75 coaxial with the cable transmission axis, an airflow nozzle, an airflow adjusting valve 73, an air source 71 and a mounting sleeve 74. The mounting sleeve 74 has a sleeve opening 741 in the center and is sleeved on the rotating main shaft 4 by the sleeve opening 741. The mounting sleeve 74 does not rotate with the rotating main shaft 4, and the bottom of the mounting sleeve 74 is supported by a support. A plurality of mounting holes 742 are arranged on the periphery of the sleeve opening 741 of the mounting sleeve 74, and the stabilizing cylinder 75 is installed in the mounting hole 742. The airflow nozzle is arranged on the stabilizing cylinder 75, the airflow nozzle is connected to the air source 71 through an air pipe 72, and the airflow adjusting valve 73 is arranged on the air pipe 72.

[0033] The center of the stabilizing cylinder 75 is provided with a cylinder center hole 751, the axis of which coincides with the monomer line transmission axis, and the monomer line passes through the cylinder center hole 751. A plurality of nozzle mounting holes 752 are uniformly opened on the cylinder wall of the stabilizing cylinder 75 in the circumferential direction, the axis of the nozzle mounting hole 752 forms a preset included angle with the radial direction of the stabilizing cylinder 75, which ensures that after the gas flow nozzle is installed, the jet direction is towards the monomer line and is inclined along the cable transmission direction. All gas flow nozzles are inclined clockwise or counterclockwise along the cable transmission direction, for example, the inclination angle is 30 degrees or 35 degrees, etc., so that the gas flow can form a spiral airflow field inside the stabilizing cylinder 75 after being sprayed, and a wrapping stabilizing force is generated on the monomer line.

[0034] In order to facilitate the installation of the gas flow nozzle, an internal thread is arranged in the nozzle mounting hole 752, which cooperates with the external thread on the outer surface of the gas flow nozzle to realize detachable connection. One end of the gas flow channel in the gas flow nozzle is communicated with the jet port, and the other end is connected with the gas source 71 through the gas pipe 72. The gas source 71 is a dry compressed air source 71 (the pressure range can be adjusted), which is used to provide clean and impurity-free gas flow. One end of the gas pipe 72 is communicated with the gas outlet of the gas source 71, and the other end is communicated with a plurality of gas flow nozzles in parallel through a three-way joint, which ensures that the gas flow pressure of each gas flow nozzle is consistent. The gas flow regulating valve 73 is connected in series on the gas pipe 72, the control end of which is electrically connected with the controller, which can adjust the gas flow and pressure in the gas pipe 72 according to the instruction of the controller, and then change the gas flow intensity of the gas flow nozzle sprayed to the surface of the monomer line.

[0035] In an embodiment, the inner wall of the stabilizing cylinder 75 is provided with a plurality of spiral airflow deflectors (not shown in the figure), each airflow deflector extends along the circumferential direction of the inner wall of the stabilizing cylinder 75, and the airflow deflectors are arranged in a staggered manner with the gas flow nozzles. The spiral airflow deflectors are arranged to cooperate with the gas flow nozzles to guide the gas flow to form a stable spiral airflow field, avoid the gas flow to be turbulent inside the stabilizing cylinder 75, and thus improve the wrapping and stabilizing effect on the monomer line.

[0036] Specifically, the airflow deflector is an arc-shaped sheet structure matched with the inner wall of the stabilizing cylinder 75, a plurality of airflow deflectors are distributed in the axial direction of the stabilizing cylinder 75, and each airflow deflector continuously extends along the circumferential direction of the inner wall of the stabilizing cylinder 75, for example, the extension trajectory of the airflow deflector forms a preset spiral angle with the axis of the stabilizing cylinder 75, which is consistent with the inclination direction of the gas flow nozzle, so that the airflow deflector can guide the gas flow sprayed by the gas flow nozzle to flow along the spiral trajectory, forming a continuous and stable spiral airflow field. At the same time, the fixing mode of the airflow deflector and the inner wall of the stabilizing cylinder 75 adopts laser welding.

[0037] In order to avoid the air flow deflector shielding the jet port of the air flow nozzle, and to ensure that the air flow jetted from the air flow nozzle can directly enter the inside of the stabilizing cylinder 75 and then be guided by the deflector to form a spiral air flow, the air flow deflector is arranged in a staggered manner with the air flow nozzle. The requirement for the staggered arrangement is that, when viewed along the axial direction of the stabilizing cylinder 75, the circumferential distribution area of the air flow deflector does not overlap with the mounting position of the air flow nozzle.

[0038] In order to improve the air flow guiding effect, the upper surface (the surface facing the air flow direction) of the air flow deflector is polished to reduce the friction coefficient between the air flow and the surface of the deflector, so that the air flow can smoothly flow along the surface of the deflector and reduce the energy loss of the air flow.

[0039] The second wire stabilizing mechanism 8 is used to adjust the electromagnetic damping force to suppress the high-frequency vibration of the single wire according to the frequency of the tension fluctuation of the single wire detected by the tension sensor. The second wire stabilizing mechanism 8 comprises a mounting disc 81, two open-opposed U-shaped magnetic cores 82, the mounting disc 81 is provided with a disc sleeve opening 812 at the center, and the disc sleeve opening 812 is sleeved on the rotating main shaft 4, the mounting disc 81 does not rotate with the rotating main shaft 4, and the bottom of the mounting disc 81 is supported by a support. A plurality of wire passing holes 811 are formed in the circumferential direction of the mounting disc 81, and the two open-opposed U-shaped magnetic cores 82 are mounted on the wire passing holes 811. The U-shaped magnetic core 82 can be made of ferrite material. The outer circumferential surface of the core of each U-shaped magnetic core 82 is wound with an excitation coil 83, the excitation coil 83 can be wound with enameled copper wire, and the two ends of the excitation coil 83 are electrically connected with the output end of an adjustable power supply through a wire. The adjustable power supply is a direct current adjustable power supply, the output current range of which can be set according to the demand of the magnetic field strength, and the control end is electrically connected with the controller, so that the output current can be adjusted according to the instruction of the controller, and then the magnetic field strength generated by the excitation coil 83 is changed.

[0040] The inner side of the two U-shaped magnetic cores 82 is provided with a metal damping ring 84, and the single wire passes through the metal damping ring 84. The metal damping ring 84 can be made of red copper material and has an elliptical ring structure, the axis of which coincides with the transmission axis of the single wire and is sleeved on the outer periphery of the single wire.

[0041] In an embodiment, the outer side of the metal damping ring 84 is fixedly connected with the inner side of the U-shaped magnetic core 82 through an elastic connecting piece. The elastic connecting piece can be made of beryllium bronze elastic sheet, and the elastic sheets are uniformly distributed along the circumferential direction of the metal damping ring 84. The first end of each elastic sheet is fixed to the inner side wall of the U-shaped magnetic core 82 by welding, and the second end is fixed to the outer circumferential surface of the metal damping ring 84 by a bolt, so that the metal damping ring 84 can swing slightly in the radial direction, and at the same time, it is ensured that the metal damping ring 84 is always within the magnetic field formed by the U-shaped magnetic core 82.

[0042] In an embodiment, the inner wall of the metal damping ring 84 is provided with ceramic protrusions (not shown in the figure), which are specifically uniformly spaced along the circumferential direction of the inner wall of the metal damping ring 84, and are in the shape of a hemisphere. The ceramic protrusions are used to enhance the air damping effect between the metal damping ring 84 and the single line without direct contact with the single line, and to assist the eddy current damping force in further attenuating the vibration of the single line.

[0043] Specifically, the ceramic protrusions are made of wear-resistant alumina ceramic material. The ceramic protrusions are in the shape of a hemisphere as a whole, with one side of the spherical surface being an action surface and the other side being a mounting surface. The flat side needs to ensure a high degree of fit with the inner wall of the metal damping ring 84 to avoid gaps that cause airflow turbulence after installation. The ceramic protrusions can be fixed by a combination of interference fit and high-temperature glue, for example, a circular mounting groove is formed in the inner wall of the metal damping ring 84 at a predetermined position and is adapted to the flat side of the ceramic protrusion. The depth of the mounting groove is slightly smaller than the thickness of the flat side of the ceramic protrusion, so that the spherical surface of the ceramic protrusion can protrude out of the inner wall of the metal damping ring 84 after installation. High-temperature epoxy glue is applied to the inner wall of the mounting groove, and the flat side of the ceramic protrusion is pressed into the mounting groove to achieve preliminary fixation by interference fit, and the connection strength and tightness are enhanced by the high-temperature epoxy glue. It should be noted that if the superimposed Δf1 causes the "initial frequency + Δf1" to exceed the maximum allowable frequency of the compressor (for example, the maximum allowable frequency of a 1.5-horsepower variable frequency air conditioner compressor is usually 75 Hz), the maximum allowable frequency of the compressor is taken as the final target initial frequency to avoid overloading of the compressor; if the superimposed Δf1 causes the "initial frequency + Δf1" to be lower than the minimum stable operating frequency of the compressor (usually 20 Hz), the minimum stable operating frequency is taken as the final target initial frequency to ensure that the compressor can start normally. The sealing property prevents the ceramic protrusions from falling off during the vibration of the metal damping ring 84 along with the single line.

[0044] It should be noted that when the inner diameter of the metal damping ring 84 is large, the number of ceramic protrusions in each group can be appropriately increased to ensure the uniformity of the air damping effect. At the same time, the multiple groups of ceramic protrusions along the axis direction of the metal damping ring 84 are staggered, i.e., the circumferential positions of the adjacent two groups of protrusions do not overlap, to avoid forming a dead angle of airflow in the vibration direction of the single line and to ensure that the single line can be subjected to the air damping effect of the ceramic protrusions regardless of the direction of vibration.

[0045] In actual work process, when the single wire generates radial vibration due to high-speed transmission, the air between the surface of the single wire and the inner wall of the metal damping ring 84 will flow with the vibration of the single wire; since the ceramic protrusions protrude from the inner wall of the metal damping ring 84, the flowing air will collide with the spherical surface of the ceramic protrusions, forming turbulent air vortex, which will generate reverse resistance (i.e. air damping force) to the vibration of the single wire. At the same time, the metal damping ring 84 generates eddy current damping force under the magnetic field of the U-shaped magnetic core 82, and the air damping force and the eddy current damping force cooperate to quickly consume the vibration energy of the single wire, so as to further reduce the vibration amplitude of the single wire. In addition, the semi-spherical structure design of the ceramic protrusions can avoid the formation of sharp turbulent flow on the surface of the protrusions, reduce the irregular impact of air flow on the single wire, and ensure the stability of the damping effect.

[0046] In the working process of the single stranding machine, the single wire released by the collecting drum 11 first passes through the tension sensor, then passes through the through hole of the shelf plate 12 close to the first wire stabilizing mechanism 7, and then enters the stabilizing cylinder 75 of the first wire stabilizing mechanism 7. The spiral air flow in the stabilizing cylinder 75 preliminarily stabilizes the single wire and suppresses the deviation caused by the change of tension. Then, the single wire enters the inner side of the metal damping ring 84 of the second wire stabilizing mechanism 8, and the high-frequency vibration is attenuated by the eddy current damping force. After the double wire stabilization, the single wire passes through the wire guide hole of the wire guide plate 2 (the wire guide plate 2 is used to uniformly distribute the plurality of single wires to the outer periphery of the stranded wire 100), and the wire guide hole is provided with a wire guide wheel 21 to facilitate the movement of the single wire. After the single wire passes through the wire guide plate 2, it is guided by the wire separation hole 31 of the wire separation plate 3 (further optimizing the stranding angle of the single wire), and finally enters the stranding hole of the parallel line die 5; at the same time, the rotating main shaft 4 drives the wire releasing frame 1, the wire guide plate 2 and the wire separation plate 3 to rotate synchronously, so that the plurality of single wires rotate around the stranded wire 100 passing through the center of the rotating main shaft 4, and form a new stranded wire 100 with a predetermined pitch under the constraint of the parallel line die 5. The new stranded wire 100 can be used as the stranded wire 100 of the next stage stranding machine, and the plurality of single wires of the stranding machine are stranded again, and through multi-stage processing, the finished aviation cable is finally formed.

[0047] The first wire stabilizing mechanism 7 and the second wire stabilizing mechanism 8 are provided, and the tension sensor on the wire releasing frame 1 is matched, the air flow size is adjusted in real time according to the wire releasing tension detected by the tension sensor, the flexible wrapping force of the air flow on the cable is used to suppress the radial deviation caused by the change of tension, and the magnetic field strength is changed by adjusting the current of the excitation coil 83 through the adjustable power supply according to the tension fluctuation frequency detected by the tension sensor, so as to adjust the eddy current damping force of the metal damping ring 84 on the cable, effectively suppress the vibration and jumping of the cable when reaching the stranding position under high-speed movement, and the first wire stabilizing mechanism 7 and the second wire stabilizing mechanism 8 do not directly contact the cable, so that the friction on the cable is reduced to a certain extent.

[0048] In an embodiment, the aviation cable stranding machine further comprises a flexible clamping mechanism as a downstream line stabilizing and guiding component of the aviation cable stranding machine, and the core object is to precisely clamp and position the preliminary stranded cable 100 formed by the doubling die 5, and to ensure that the stranded cable 100 enters the subsequent winding process or the next stage of the stranding machine in a stable state, thereby avoiding the posture deviation of the stranded cable 100 caused by downstream transmission disturbance.

[0049] The flexible clamping mechanism comprises a fixed seat, a fixed clamping block, a movable clamping block, and a clamping cylinder. The fixed seat is provided with a guide cavity. The fixed clamping block and the movable clamping block are oppositely arranged in the guide cavity, and the movable clamping block is located above the fixed clamping block. One side of the fixed clamping block and the movable clamping block opposite to each other is provided with a fixed arc-shaped groove. One side of the movable clamping block opposite to the fixed clamping block is provided with a movable arc-shaped groove. The groove wall of the fixed arc-shaped groove and / or the movable arc-shaped groove is provided with an elastic pad. A plurality of pressure sensors are arranged in the elastic pad. The pressure sensors are used to detect the contact pressure between the elastic pad and the cable. The fixed arc-shaped groove and the movable arc-shaped groove are combined to form a clamping and limiting hole through which the cable can pass. The piston rod of the clamping cylinder is connected with the movable clamping block to drive the movable clamping block to move, and the clamping cylinder supports small-angle deflection adjustment.

[0050] The flexible clamping mechanism is arranged downstream of the doubling die 5 and is spaced apart along the transmission direction of the stranded cable 100. The fixed seat is in the form of a cuboid structure. One side of the fixed seat facing the doubling die 5 is provided with a guide cavity extending from front to back. The guide cavity is in the form of a rectangular cavity. The upper and lower inner walls of the guide cavity are respectively provided with positioning structures. The lower side is a rectangular positioning groove for embedding the fixed clamping block. The positioning groove and the outer circumferential surface of the fixed clamping block are in transition fit. The fixed clamping block is locked by the internal hexagonal bolts distributed along the side surface of the fixed seat to prevent the fixed clamping block from being displaced due to vibration during the transmission of the stranded cable 100. The upper side is a T-shaped sliding groove matched with a T-shaped sliding block at the top of the movable clamping block. The movable clamping block can slide up and down along the T-shaped sliding groove to clamp and release the stranded cable 100. The T-shaped structure can limit the lateral deviation of the movable clamping block to ensure the accuracy of the clamping action.

[0051] An installation through hole communicating with the guide cavity is formed in the central position of the top of the fixed seat. The clamping cylinder is fixed to the top of the fixed seat by a flange plate.

[0052] The fixed clamping block and the movable clamping block are both made of polyether ether ketone (PEEK) material. The opposite sides of the two are respectively provided with a fixed arc-shaped groove and a movable arc-shaped groove. The groove walls of the fixed arc-shaped groove and / or the movable arc-shaped groove are provided with elastic pads. In this embodiment, elastic pads are bonded to the groove walls of the fixed arc-shaped groove and the movable arc-shaped groove. The elastic pads can be made of fluorosilicone rubber material. The elastic pads are bonded to the groove walls of the fixed arc-shaped groove and the movable arc-shaped groove through high-temperature-resistant epoxy glue.

[0053] The elastic pads are provided with a plurality of micro pressure sensors. The pressure sensors can be thin film pressure sensors. The pressure sensors are uniformly distributed along the circumferential direction and the axial direction of the arc-shaped groove. The leads of the pressure sensors are led out through the micro threading holes pre-set in the fixed clamping block and the movable clamping block. The ends of the leads are connected to the controller of the stranding machine through connectors, and the contact pressure data is transmitted in real time.

[0054] The fixed arc-shaped groove and the movable arc-shaped groove combine to form a clamping limiting hole, and the diameter of the clamping limiting hole is slightly smaller than the outer diameter of the stranded wire 100. When the movable clamping block moves downward under the drive of the clamping cylinder, the elastic pads are extruded to deform, and the deformation force forms a flexible clamping on the stranded wire 100, which ensures that the stranded wire 100 is limited and avoids radial jumping during downstream transmission.

[0055] In an embodiment, the flexible clamping mechanism further comprises a linear motion module, the linear motion module is connected with the fixed seat, and the linear motion module is used to drive the fixed seat to move along the axis direction of the rotating main shaft 4.

[0056] Specifically, the linear motion module adopts a ball screw type linear module, which includes a module base, a sliding table, a ball screw, a servo motor and a guide rail. The module base is fixed to the machine table of the stranding machine through expansion bolts, and the axis of the module base is completely parallel to the transmission axis of the stranded wire 100 (i.e. the axis of the rotating main shaft 4), which ensures that the sliding table drives the fixed seat to move accurately along the transmission direction of the stranded wire 100. The bottom of the fixed seat is rigidly connected with the sliding table of the linear motion module through bolts, and two positioning pins are arranged between the connecting surfaces, and the positioning pins and the positioning holes of the fixed seat and the sliding table are in interference fit.

[0057] The servo motor of the linear motion module is electrically connected with the controller, and the speed and direction of the servo motor can be accurately controlled through the controller, so as to adjust the moving speed and displacement of the sliding table.

[0058] Through the linear motion module, the position of the flexible clamping mechanism can be adjusted within a certain range, so that the flexible clamping mechanism can clamp and limit the stranded wire 100 according to actual needs.

[0059] The embodiment of the present application also provides a control method of the aviation cable stranding machine, which comprises the following steps: S10-S30.

[0060] S10, detecting the pay-off tension and tension fluctuation frequency of the cable in real time through the tension sensor.

[0061] Before detection, the tension sensor needs to be calibrated. After the aviation cable stranding machine is started, the single wire is released from the collecting drum 11 and transmitted to the first wire stabilizing mechanism 7 downstream through the detection end of the tension sensor.

[0062] When detecting the pay-off tension, the tension sensor collects the pressure signal of the single wire on the detection surface in real time, converts the pressure signal into an electrical signal, and transmits it to the controller. The controller calculates the real-time pay-off tension value (unit: N) according to the preset electrical signal and tension value calibration curve. The detection sampling frequency is set to 100 Hz to ensure the capture of instantaneous tension changes; When detecting the tension fluctuation frequency: the controller performs fast Fourier transform (FFT) on the continuously collected pay-off tension values (such as 10 data points collected every 100 ms), extracts the main frequency component of the tension value change over time, and the main frequency component is the "tension fluctuation frequency" (unit: Hz). For example, when the single wire vibrates at high speed due to high-speed transmission, the tension value will fluctuate periodically, and after FFT transformation, the main frequency of the fluctuation (such as 120 Hz) can be obtained, reflecting the severity of the vibration.

[0063] The controller synchronously displays the real-time detected pay-off tension value and tension fluctuation frequency on the human-machine interface (such as a touch screen) and stores them in the local database, which facilitates subsequent production tracing and parameter optimization. At the same time, the controller presets a tension value threshold range and a tension fluctuation frequency threshold range (which can be determined according to the material, diameter, and stranding process of the single wire, for example, the tension value threshold is 0.3-0.5 N, and the fluctuation frequency threshold is ≤100 Hz). When the detected value exceeds the threshold, the controller triggers the subsequent adjustment step.

[0064] S20, if the detected pay-off tension increases, increase the airflow of the airflow nozzle, and if the detected pay-off tension decreases, decrease the airflow of the airflow nozzle.

[0065] The airflow regulating valve 73 is an electromagnetic proportional regulating valve, and its control end is electrically connected to the controller. The valve opening can be adjusted according to the PWM signal (pulse width modulation signal) output by the controller, thereby changing the airflow flow rate and pressure in the air pipe 72, and finally controlling the jet airflow intensity of the airflow nozzle (the airflow intensity is positively related to the valve opening).

[0066] Before adjustment, the correspondence between the wire tension and the opening of the airflow adjusting valve 73 needs to be established. Specifically, the optimal airflow intensity that can keep the monomer line stable under different wire tensions can be tested through experiments. For example, when the wire tension is 0.3 N (lower limit of the threshold), the opening of the airflow adjusting valve 73 is set to 30%, and the airflow intensity is just enough to suppress the swinging of the monomer line. When the tension is 0.5 N (upper limit of the threshold), the opening is set to 70%, and the airflow intensity is sufficient to offset the swinging trend of the monomer line. The valve opening data corresponding to different tensions are stored in the controller as the basis for adjustment.

[0067] The controller compares the detected wire tension value with the preset threshold range in real time. When it is detected that the wire tension value exceeds the upper limit of the threshold (e.g., greater than 0.5 N) or the tension value continuously increases (e.g., from 0.4 N to 0.48 N in 1 s, with an increase of 20%) without exceeding the upper limit, the controller determines that the monomer line has a risk of swinging deviation. At this time, the controller retrieves the target valve opening corresponding to the tension and outputs a PWM signal to control the airflow adjusting valve 73 to increase the opening, thereby increasing the airflow intensity of the airflow nozzle. For example, when the tension increases from 0.5 N to 0.6 N, the valve opening increases from 70% to 85%, and after the airflow intensity is increased, the wrapping force of the spiral airflow in the stabilizing cylinder 75 on the monomer line is enhanced, offsetting the swinging trend caused by the increase in tension and making the monomer line return to the transmission axis. At the same time, the controller continuously monitors the tension value, and when the tension falls within the threshold range (e.g., 0.45 N), the adjusting valve opening falls to 60% to avoid excessive deviation of the monomer line caused by excessive airflow.

[0068] When it is detected that the wire tension value is lower than the lower limit of the threshold (e.g., <0.3 N) or the tension value continuously decreases (e.g., from 0.4 N to 0.32 N in 1 s, with a decrease of 20%), the controller determines that the monomer line has a risk of swinging deviation. At this time, the controller retrieves the target valve opening corresponding to the tension and controls the airflow adjusting valve 73 to decrease the opening, thereby reducing the airflow intensity of the airflow nozzle. For example, when the tension decreases from 0.3 N to 0.2 N, the valve opening decreases from 30% to 15%, and after the airflow intensity is reduced, it avoids blowing the relaxed monomer line off track due to excessive airflow; when the tension rises to 0.35 N, the opening is adjusted back to 40% to ensure that the airflow can stabilize the monomer line without causing additional tension.

[0069] S30, if it is detected that the tension fluctuation frequency increases, the output current of the adjustable power supply is increased, and if it is detected that the tension fluctuation frequency decreases, the output current of the adjustable power supply is decreased.

[0070] The output current range of the adjustable power supply is matched with the number of turns of the excitation coil 83 (e.g., the number of turns of the coil is 800 in this embodiment, and the current range is 0.5-5 A), the current size is positively correlated with the magnetic field intensity generated by the U-shaped magnetic core 82, and in turn is positively correlated with the eddy current damping force of the metal damping ring 84 (the larger the current, the stronger the magnetic field, and the greater the damping force).

[0071] Before adjustment, the correspondence between the tension fluctuation frequency and the adjustable power supply current needs to be established: through experimental tests under different fluctuation frequencies, the optimal current value that makes the monomer wire vibration amplitude decrease to ≤0.1 mm is determined. For example, when the fluctuation frequency is 100 Hz (upper threshold), the current is set to 2 A, and the damping force just suppresses the high-frequency vibration; when the frequency is 150 Hz (50% above the threshold), the current is set to 3.5 A, and the damping force is significantly enhanced; the current data corresponding to different frequencies are stored in the controller as the basis for adjustment.

[0072] The controller compares the detected tension fluctuation frequency with the preset threshold range in real time. When it is detected that the fluctuation frequency exceeds the upper threshold (such as >100 Hz), or the frequency has not exceeded the upper threshold but continues to rise (such as increasing from 80 Hz to 98 Hz within 1 s, an increase of 22.5%), the controller determines that the monomer wire vibration is intensified, at which time the controller retrieves the target current value corresponding to the frequency and outputs a control signal to adjust the adjustable power supply to increase the output current of the excitation coil 83. For example, when the frequency increases from 100 Hz to 120 Hz, the current increases from 2 A to 2.8 A, the magnetic field strength of the U-shaped magnetic core 82 is enhanced, the eddy current damping force induced by the metal damping ring 84 is increased, and the air damping force of the ceramic protrusion is cooperated to quickly attenuate the vibration energy of the monomer wire, so that the fluctuation frequency falls; at the same time, the controller monitors the frequency change through the tension sensor, and when the frequency decreases to 90 Hz, the current is adjusted back to 1.8 A to avoid excessive damping force affecting the transmission speed of the monomer wire.

[0073] When it is detected that the fluctuation frequency is lower than the lower threshold (such as <50 Hz), or the frequency continues to decrease (such as decreasing from 100 Hz to 60 Hz within 1 s, a decrease of 40%), the controller determines that the monomer wire vibration has been effectively suppressed, at which time if the high current is maintained, it will cause excessive damping force and increase the transmission resistance of the monomer wire. The controller retrieves the target current value corresponding to the frequency and controls the adjustable power supply to reduce the output current. For example, when the frequency decreases from 100 Hz to 70 Hz, the current decreases from 2 A to 1.5 A, and after the damping force is weakened, the transmission resistance of the monomer wire is reduced to avoid the tension increasing due to excessive damping; when the frequency stabilizes at 80 Hz, the current is maintained at 1.6 A to ensure that the damping force matches the vibration intensity.

[0074] In an embodiment, the control method of the aviation cable stranding machine further comprises the following steps: S40-S50.

[0075] S40, the contact pressure between the elastic pad and the cable is detected in real time by the pressure detector.

[0076] The controller presets a contact pressure threshold range, including a minimum threshold (such as 0.1 MPa, below which the clamping force is insufficient) and a maximum threshold (such as 0.5 MPa, above which the clamping force is excessive).

[0077] When the twisted wire 100 is twisted by the parallel line die 5 and enters the flexible clamping mechanism, and the clamping cylinder completes the initial clamping action. Each pressure sensor collects the pressure signal at the contact between the elastic pad and the twisted wire 100 in real time, and transmits the signal converted into a voltage value to the controller. The controller calculates the real-time contact pressure value of each detection point according to the calibration curve of voltage and pressure, and the sampling frequency is set to 50Hz.

[0078] For example, 8 groups of pressure sensors are provided, and the controller calculates the average value of the detection values of the 8 groups of pressure sensors on the same circumferential surface. If the detection value of a certain pressure sensor deviates from the average value by more than 5%, it is determined that the pressure in that direction is uneven (for example, the twisted wire 100 deviates to the side of the fixed clamping block, resulting in higher pressure on the fixed side and lower pressure on the movable side); at the same time, the average values of the 3 groups of axial sensors are compared, and if the deviation between the groups is greater than 5%, it is determined that the pressure distribution of the twisted wire 100 in the length direction is uneven.

[0079] S50, if the contact pressure between the elastic pad and the cable is detected to be less than the minimum threshold value, the extension distance of the piston rod of the clamping cylinder to the cable is controlled.

[0080] The controller compares the detected contact pressure value with the preset minimum threshold value in real time. If the pressure values of all detection points are lower than the minimum threshold value (such as generally 0.07MPa, lower than the threshold value 0.1MPa), and the uniformity deviation is within the allowable range, the controller determines that the overall clamping force is insufficient. At this time, the controller retrieves the piston rod extension amount corresponding to the target pressure (minimum threshold value), calculates the difference between the current extension amount and the target extension amount, and outputs a position command to control the piston rod to extend at a uniform speed by the difference value.

[0081] If only the pressure value in a certain direction (such as the side of the movable clamping block) is lower than the minimum threshold value, the controller determines that the twisted wire 100 is offset, resulting in insufficient local clamping force. At this time, the controller does not perform overall extension of the piston rod, but outputs a small amount of deflection command of the piston rod (the clamping cylinder supports small angle deflection adjustment, the deflection range is ±1°), so that the movable clamping block tilts to the side with lower pressure, increasing the contact area and pressure between the elastic pad and the twisted wire 100 on that side.

[0082] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present application, and these modifications or replacements should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An aerial cable stranding machine comprising a pay-off stand, a collecting drum, a conductor plate, a separating plate, a rotating main shaft and a combining die, said pay-off stand, said conductor plate, said separating plate and said combining die are coaxially and spacedly arranged in sequence along the cable transmission direction, said pay-off stand, said conductor plate, said separating plate are fixed on said rotating main shaft and rotate with it, said collecting drum is arranged on said pay-off stand, characterized in that, The tension sensor is arranged on the pay-off rack, and the first line stabilizing mechanism and the second line stabilizing mechanism are sequentially arranged between the pay-off rack and the wire board along the cable transmission direction.

2. An aircraft cable stranding machine according to claim 1, wherein, The stabilizing cylinder is provided with a plurality of nozzle mounting holes which are distributed in the circumferential direction of the inner wall of the stabilizing cylinder, and the air flow nozzles are mounted in the nozzle mounting holes and directed towards the cable.

3. An aircraft cable stranding machine as claimed in claim 1, wherein, The air flow nozzles are arranged at an angle with the cable surface and all the air flow nozzles are inclined clockwise or counterclockwise along the cable transmission direction.

4. An aircraft cable stranding machine as claimed in claim 1, wherein, The inner wall of the stabilizing cylinder is provided with a plurality of spiral air flow guide plates which extend in the circumferential direction of the inner wall of the stabilizing cylinder, and the air flow guide plates are arranged in a staggered manner with the air flow nozzles.

5. An aircraft cable stranding machine as claimed in claim 1, wherein, The inner wall of the metal damping ring is provided with ceramic protrusions which are in the shape of a hemisphere.

6. An aircraft cable stranding machine as claimed in claim 1, wherein, The elastic connecting member is arranged between the outer side of the metal damping ring and the inner side of the U-shaped magnetic core, and has at least a first end and a second end arranged oppositely, the first end of the elastic connecting member is fixedly connected with the inner side of the U-shaped magnetic core, and the second end of the elastic connecting member is fixedly connected with the outer side of the metal damping ring.

7. An aircraft cable stranding machine according to any one of claims 1 to 6, wherein, The flexible clamping mechanism comprises a fixed seat, a fixed clamping block, a movable clamping block and a clamping cylinder, the fixed seat is provided with a guide cavity, the fixed clamping block and the movable clamping block are arranged oppositely in the guide cavity, and the movable clamping block is located above the fixed clamping block, one side of the fixed clamping block and the movable clamping block oppositely is provided with a fixed arc-shaped groove, the other side of the movable clamping block oppositely the fixed clamping block is provided with a movable arc-shaped groove, the groove wall of the fixed arc-shaped groove and / or the movable arc-shaped groove is provided with an elastic pad, a plurality of pressure sensors are arranged in the elastic pad, the pressure sensors are used for detecting the contact pressure between the elastic pad and the cable, the fixed arc-shaped groove and the movable arc-shaped groove are combined to form a clamping limiting hole through which the cable can pass, and the piston rod of the clamping cylinder is connected with the movable clamping block to drive the movable clamping block to move.

8. An aircraft cable stranding machine according to claim 7, wherein, The flexible clamping mechanism further comprises a linear motion module, the linear motion module is connected with the fixed seat, and the linear motion module is used for driving the fixed seat to move along the axis direction of the rotating main shaft.

9. A control method for an aerial cable stranding machine as claimed in any one of claims 7-8, characterized in that, The tension sensor is arranged on the pay-off rack, and the first line stabilizing mechanism and the second line stabilizing mechanism are sequentially arranged between the pay-off rack and the wire board along the cable transmission direction. The tension sensor is arranged on the pay-off rack, and the first line stabilizing mechanism and the second line stabilizing mechanism are sequentially arranged between the pay-off rack and the wire board along the cable transmission direction. ​ If the tension fluctuation frequency is detected to be increased, the output current of the adjustable power supply is increased, and if the tension fluctuation frequency is detected to be decreased, the output current of the adjustable power supply is decreased.

10. The control method of an aircraft cable stranding machine according to claim 9, characterized in that, Also included are: The contact pressure between the elastic pad and the cable is detected in real time by a pressure detector. If the contact pressure between the elastic pad and the cable is detected to be less than a minimum threshold, the extension distance of the piston rod of the clamping cylinder toward the cable is controlled.

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