An aerial cable stranding machine and a control method thereof

Abstract

The application discloses an aviation cable stranding machine and a control method thereof. The aviation cable stranding machine comprises a pay-off rack, a cable collecting drum, a guide plate, a cable distributing plate, a rotating main shaft and a parallel cable die. First and second cable stabilizing mechanisms are sequentially arranged between the pay-off rack and the guide plate along the cable transmission direction. The first cable stabilizing mechanism comprises a stabilizing drum 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 drum. 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 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. A metal damping ring is arranged on the inner side of the two U-shaped magnetic cores. The first and second cable stabilizing mechanisms are arranged, and are matched with the tension sensor on the pay-off rack, so that the problem that the stranding quality is reduced due to the vibration and jumping of the cable during the pay-off process is avoided.

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:

[0007] 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.

[0008] 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.

[0009] 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.

[0010] 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.

[0011] Further, the inner wall of the metal damping ring is provided with a ceramic protrusion, the ceramic protrusion is in a semispherical shape.

[0012] 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.

[0013] 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.

[0014] Further, the flexible clamping mechanism further comprises a linear movement module, the linear movement module is connected with the fixed seat, and the linear movement module is used for driving the fixed seat to move along the axis direction of the rotating main shaft.

[0015] In another aspect, the present application also provides a control method of the aviation cable stranding machine.

[0016] The tension sensor is used for detecting the cable laying tension and the tension fluctuation frequency in real time.

[0017] If the cable laying tension is detected to increase, the airflow of the airflow nozzle is increased, and if the cable laying tension is detected to decrease, the airflow of the airflow nozzle is decreased.

[0018] 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.

[0019] Further, the present application further comprises:

[0020] The pressure detector is used for detecting the contact pressure between the elastic pad and the cable in real time.

[0021] 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.

[0022] 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 distributing plate, a rotating main shaft and a parallel cable die, the pay-off rack, the guide plate, the cable distributing plate and the parallel cable die are coaxially and spacedly arranged in sequence along the cable transmission direction, the pay-off rack, the guide plate and the cable distributing 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, a tension sensor is arranged on the pay-off rack, a first cable stabilizing mechanism and a second cable stabilizing mechanism are arranged in sequence between the pay-off rack and the guide plate along the cable transmission direction, the first cable stabilizing mechanism comprises a stabilizing cylinder coaxial with the cable transmission axis, an air flow nozzle, an air flow adjusting valve and an air source, the air flow nozzle is arranged on the stabilizing cylinder, the air flow nozzle is connected with the air source through an air pipe, and the air flow 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 a metal damping ring is arranged on the inner side of the two U-shaped magnetic cores.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 air flow size is adjusted in real time according to the pay-off 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 tension change, the magnetic field strength is changed by adjusting the excitation coil current through the adjustable power supply according to the tension fluctuation frequency detected by the tension sensor, 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 motion 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.

[0023] 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, it can be implemented according to the content of the specification, 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

[0024] 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.

[0025] Figure 1 A structure schematic diagram of an aviation cable stranding machine provided by the specific embodiment of the present application is shown in the figure.

[0026] Figure 2 A structure schematic diagram of the first cable stabilizing mechanism of the aviation cable stranding machine provided by the specific embodiment of the present application is shown in the figure.

[0027] Figure 3A first wire stabilizing mechanism of an aviation cable stranding machine according to an embodiment of the present application;

[0028] Figure 4 A structure diagram of a stabilizing cylinder of an aviation cable stranding machine according to an embodiment of the present application;

[0029] Figure 5 An installation diagram of a second wire stabilizing mechanism of an aviation cable stranding machine according to an embodiment of the present application;

[0030] Figure 6 A structure diagram of a second wire stabilizing mechanism of an aviation cable stranding machine according to an embodiment of the present application;

[0031] Reference signs:

[0032] 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 distributing plate; 31, a wire distributing 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

[0033] The technical solutions of the present application will be described clearly and completely below in combination with the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0034] In the description of the present application, it should be understood that 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" and the like indicate the orientation or positional relationship based on the orientation or positional relationship 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 referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0035] In addition, the terms "first", "second", etc. are used only for descriptive purposes and do not connote or imply relative importance or an ordering between or among the indicated technical features. Thus, a feature defined with "first", "second", etc. can include at least one of the features, explicitly or implicitly. In the description of the present application, the meaning of "a plurality" is at least two, for example, two, three, etc., unless otherwise explicitly and specifically defined.

[0036] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly 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.

[0037] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be directly above or obliquely above the first feature, or only indicate 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 directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0038] 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 only for illustrative purposes and do not represent the only implementation.

[0039] 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 single wire primary stranding, secondary stranding and composite stranding, and finally form 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.

[0040] In actual production, multiple aviation cable stranding machines are arranged linearly 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, the cable diameter is gradually increased through multi-stage stranding, and finally a finished product cable meeting the standard is obtained.

[0041] As shown in Figures 1 to 6 The embodiment of the application provides an aviation cable stranding machine, which comprises a controller, a frame plate 12, a pay-off rack 1, a wire collecting drum 11, a wire guide plate 2, a wire distribution plate 3, a rotating main shaft 4 and a wire combining die 5. The pay-off rack 1, the wire guide plate 2, the wire distribution plate 3 and the wire combining die 5 are coaxially and spaced apart in sequence along the cable transmission direction. The rotating main shaft 4 is installed on two relatively 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 stranded wire 100 passes through the hollow structure of the rotating main shaft 4. The pay-off rack 1, the wire guide plate 2 and the wire distribution plate 3 are fixed on the rotating main shaft 4 by key connection and rotate with the rotating main shaft 4. The wire collecting drum 11 is used for winding the single wire to be processed. The wire collecting drum 11 is detachably installed on the pay-off rack 1 by bolts and can rotate relative to the pay-off rack 1 to pay off the wire.

[0042] The wire combining die 5 is centrally provided with a stranding hole matched with the diameter of the target stranded wire 100, which is used for restraining multiple single wires into a preset stranding mode. The wire combining die 5 belongs to the prior art and will not be described in detail here.

[0043] The tension sensor is fixed on the single wire output end of the pay-off rack 1 through a support, the detection end of the tension sensor is attached to the surface of the single wire, the pay-off tension and the tension fluctuation frequency in the transmission process of the single wire are collected in real time, and the detection signal is transmitted to the controller (not shown in the figure) of the stranding machine, so that the adjustment of the first wire stabilizing mechanism 7 and the second wire stabilizing mechanism 8 is provided.

[0044] In order to solve the vibration problem of the single wire in high-speed transmission, the first wire stabilizing mechanism 7 and the second wire stabilizing mechanism 8 are arranged in sequence along the transmission direction of the single wire between the pay-off rack 1 and the wire guide plate 2: the first wire stabilizing mechanism 7 wraps and limits the single wire through flexible airflow to suppress the radial deviation caused by the change of the tension; the second wire stabilizing mechanism 8 attenuates the high-frequency vibration of the single wire through electromagnetic damping effect, and the two cooperate to ensure that the single wire enters the subsequent stranding process in a stable state.

[0045] Specifically, the first stabilizing mechanism 7 comprises a stabilizing cylinder 75 coaxial with the cable transmission axis, an air flow nozzle, an air flow adjusting valve 73, an air source 71, and a mounting sleeve 74 with a sleeve opening 741 in the center thereof and sleeved on the rotating main shaft 4, the mounting sleeve 74 not rotating with the rotating main shaft 4, the bottom of the mounting sleeve 74 being supported by a support. The mounting sleeve 74 is provided with a plurality of mounting holes 742 in the peripheral direction of the sleeve opening 741, the stabilizing cylinder 75 being mounted in the mounting holes 742, the air flow nozzle being arranged on the stabilizing cylinder 75, the air flow nozzle being connected to the air source 71 through an air pipe 72, and the air flow adjusting valve 73 being arranged on the air pipe 72.

[0046] The stabilizing cylinder 75 is provided with a cylinder center hole 751 in the center thereof, the axis of the cylinder center hole 751 coinciding with the monomer cable transmission axis, and the monomer cable passing through the cylinder center hole 751. A plurality of nozzle mounting holes 752 are uniformly arranged in the peripheral direction of the cylinder wall of the stabilizing cylinder 75, the axis of the nozzle mounting hole 752 being at a preset angle with the radial direction of the stabilizing cylinder 75, so as to ensure that, after the air flow nozzle is mounted, the jet direction of the air flow nozzle is directed towards the monomer cable and is inclined in the cable transmission direction, all the air flow nozzles being inclined clockwise or counterclockwise in the cable transmission direction, for example, at an angle of 30 degrees or 35 degrees, etc., so that the air flow can form a spiral air flow field inside the stabilizing cylinder 75 after being jetted, and a wrapping stabilizing force is generated on the monomer cable.

[0047] In order to facilitate the installation of the air flow nozzle, an internal thread is arranged in the nozzle mounting hole 752, the internal thread being matched with an external thread on the outer surface of the air flow nozzle, so as to realize detachable connection. An air flow passage in the air flow nozzle is in communication with the jetting port at one end thereof and is connected to the air source 71 through the air pipe 72 at the other end thereof. The air source 71 is a dry compressed air source 71 (the pressure range being adjustable), which is used to provide clean and impurity-free air flow. One end of the air pipe 72 is in communication with the air outlet of the air source 71, and the other end thereof is in parallel communication with a plurality of air flow nozzles through a three-way joint, so as to ensure that the air flow pressures of the air flow nozzles are consistent. The air flow adjusting valve 73 is in series on the air pipe 72, the control end thereof being electrically connected to the controller, so as to adjust the air flow rate and pressure in the air pipe 72 according to the instruction of the controller, and further change the air flow intensity of the air flow nozzle jetted to the surface of the monomer cable.

[0048] In an embodiment, the inner wall of the stabilizing cylinder 75 is provided with a plurality of spiral air flow deflectors (not shown in the figure), each air flow deflector extending in the peripheral direction of the inner wall of the stabilizing cylinder 75, and the air flow deflectors being arranged in a staggered manner with the air flow nozzles. The spiral air flow deflectors are arranged to guide the air flow to form a stable spiral air flow field in cooperation with the air flow nozzles, so as to avoid the air flow being turbulent inside the stabilizing cylinder 75, and further improve the wrapping stabilizing effect on the monomer cable.

[0049] Specifically, the airflow guide plate is an arc-shaped thin sheet structure matched with the inner wall of the stabilizing cylinder 75, a plurality of airflow guide plates are distributed along the axial direction of the stabilizing cylinder 75, and each airflow guide plate continuously extends along the circumferential direction of the inner wall of the stabilizing cylinder 75. For example, the extension trajectory of the airflow guide plate has a preset helical angle with the axis of the stabilizing cylinder 75, and the helical angle is consistent with the inclination direction of the airflow nozzle, so that the airflow guide plate can guide the airflow sprayed by the airflow nozzle to flow along a helical trajectory to form a continuous and stable helical airflow field. At the same time, the fixing mode of the airflow guide plate and the inner wall of the stabilizing cylinder 75 adopts laser welding.

[0050] In order to avoid the airflow guide plate shielding the spray port of the airflow nozzle, and to ensure that the airflow sprayed by the airflow nozzle can directly enter the inside of the stabilizing cylinder 75 and then be guided by the guide plate to form a helical airflow, the airflow guide plate is arranged in a staggered manner with the airflow nozzle. The requirement for staggered arrangement is that, when viewed along the axial direction of the stabilizing cylinder 75, the circumferential distribution area of the airflow guide plate does not overlap with the mounting position of the airflow nozzle.

[0051] In order to improve the airflow guiding effect, the upper surface (the side facing the airflow flow direction) of the airflow guide plate is polished to reduce the friction coefficient between the airflow and the surface of the guide plate, so that the airflow can smoothly flow along the surface of the guide plate and reduce the energy loss of the airflow.

[0052] 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 includes 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. A field winding 83 is wound around the outer circumferential surface of the core of each U-shaped magnetic core 82. The field winding 83 can be wound by enameled copper wire. The two ends of the field winding 83 are electrically connected to 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 to the controller, so that the output current can be adjusted according to the instruction of the controller, and the magnetic field strength generated by the field winding 83 is changed.

[0053] A metal damping ring 84 is arranged on the inner side of the two U-shaped magnetic cores 82, and the single wire passes through the metal damping ring 84. The metal damping ring 84 can be made of red copper 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.

[0054] 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 elastic connectors. The elastic connectors can be made of beryllium bronze elastic sheets. The elastic sheets are uniformly distributed along the circumference 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 through welding, and the second end is fixed to the outer circumferential surface of the metal damping ring 84 through a bolt, so that the metal damping ring 84 can swing slightly in the radial direction, while ensuring that the metal damping ring 84 is always within the magnetic field formed by the U-shaped magnetic core 82.

[0055] In an embodiment, the inner wall of the metal damping ring 84 is provided with ceramic protrusions (not shown in the figure). The ceramic protrusions can be uniformly and spacedly arranged along the circumferential direction of the inner wall of the metal damping ring 84. The ceramic protrusions are in a semispherical shape. The ceramic protrusions are used to enhance the air damping effect between the metal damping ring 84 and the single-phase line without direct contact with the single-phase line, and to assist the eddy current damping force in further attenuating the vibration of the single-phase line.

[0056] Specifically, the ceramic protrusions are made of wear-resistant aluminum oxide ceramic material. The ceramic protrusions are in a semispherical structure, with the spherical side as the acting surface and the flat side as the mounting surface. The flat side needs to ensure the 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 the predetermined position, which 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 side 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 sealing 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 prevents the ceramic protrusion from falling off during the vibration of the metal damping ring 84 with the single-phase line.

[0057] It should be noted that when the inner diameter of the metal damping ring 84 is larger, 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, that is, the circumferential positions of the adjacent two groups of protrusions do not overlap, so as to avoid forming a dead angle of air flow in the direction of single wire vibration, and to ensure that the single wire can be subjected to the air damping effect generated by the ceramic protrusions regardless of the direction of vibration.

[0058] 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 a 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 hemispherical structure design of the ceramic protrusions can avoid the formation of sharp turbulent flow of air on the protrusion surface, reduce the irregular impact of air flow on the single wire, and ensure the stability of the damping effect.

[0059] In the working process of a single stranding machine, the single wire released by the collecting cylinder 11 first passes through the tension sensor, and 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-stabilized single wire, it passes through the wire guide hole of the wire guide plate 2 (the wire guide plate 2 is used to uniformly distribute multiple single wires on the outer periphery of the stranded wire 100), and a wire guide wheel 21 is arranged in the wire guide hole to facilitate the movement of the single wire. After the single wire passes through the wire guide plate 2, it is guided through the wire guide hole 31 of the wire distribution 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 distribution plate 3, the wire guide plate 2 and the wire distribution plate 3 to rotate synchronously, so that multiple 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 multiple single wires of the stranding machine are stranded again, and through multiple stages of processing, the finished aviation cable is finally formed.

[0060] The first stabilizing mechanism 7 and the second stabilizing mechanism 8 are arranged, and cooperate with the tension sensor on the pay-off rack 1, the size of the airflow 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, and according to the tension fluctuation frequency detected by the tension sensor, the current of the excitation coil 83 is adjusted by the adjustable power supply to change the magnetic field strength, and then the eddy current damping force of the metal damping ring 84 on the cable is adjusted, so that the vibration and jumping of the cable under high-speed motion when reaching the stranded position are effectively suppressed, and the first stabilizing mechanism 7 and the second stabilizing mechanism 8 do not directly contact the cable, thereby reducing the friction on the cable to a certain extent.

[0061] In an embodiment, the aircraft cable stranding machine further comprises a flexible clamping mechanism, which is a downstream stabilizing and guiding component of the aircraft cable stranding machine, and the core object is the stranded wire 100 formed by the preliminary stranding of the doubling die 5. The flexible clamping mechanism is arranged downstream of the doubling die 5 and is used for accurately clamping and limiting the stranded wire 100 after stranding and posture correction, so as to ensure that the stranded wire 100 enters the subsequent winding process or the next stage of the stranding machine in a stable state, and avoid the posture deviation of the stranded wire 100 caused by downstream transmission disturbance.

[0062] 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 in the guide cavity in opposition, and the movable clamping block is located above the fixed clamping block. One side of the fixed clamping block and the movable clamping block in opposition is provided with a fixed arc-shaped groove. One side of the movable clamping block in opposition 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 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. Meanwhile, the clamping cylinder supports small-angle deflection adjustment.

[0063] The flexible clamping mechanism is arranged downstream of the doubling die 5 and is spaced apart along the transmission direction of the twisted wire 100. The fixed seat has a cuboid structure, and a guide cavity is formed through the front and back of one side of the fixed seat. The guide cavity is a rectangular cavity, and 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 and fixing the fixed clamping block. The positioning groove and the outer peripheral surface of the fixed clamping block are in transition fit, and 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 twisted wire 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 realize clamping and releasing of the twisted wire 100, and the T-shaped structure can limit the lateral deviation of the movable clamping block to ensure the accuracy of the clamping action.

[0064] A mounting through hole is formed in the central position of the top of the fixed seat and is in communication with the guide cavity. The clamping cylinder is fixed to the top of the fixed seat through a flange plate. The piston rod of the clamping cylinder extends into the guide cavity through the mounting through hole and is threadedly connected to the top of the movable clamping block.

[0065] Both the fixed clamping block and the movable clamping block are 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. Elastic pads are arranged on the groove walls of the fixed arc-shaped groove and / or the movable arc-shaped groove. 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.

[0066] A plurality of micro pressure sensors are arranged in the elastic pads. 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 prearranged in the fixed clamping block and the movable clamping block. The ends of the leads are connected to the twisting machine controller through connectors to transmit contact pressure data in real time.

[0067] The clamping limiting hole formed by the combination of the fixed arc-shaped groove and the movable arc-shaped groove has a diameter slightly smaller than the outer diameter of the twisted 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 twisted wire 100, which ensures that the twisted wire 100 is limited and avoids radial jumping during downstream transmission.

[0068] 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.

[0069] Specifically, the linear movement module adopts a ball screw type linear module, which comprises a module base, a sliding table, a ball screw, a servo motor and a guide slide rail. The module base is fixed on 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 stranding wire 100 (i.e. the axis of the rotating main shaft 4), so as to ensure that the sliding table drives the fixed seat to move accurately along the transmission direction of the stranding wire 100. The bottom of the fixed seat is rigidly connected with the sliding table of the linear movement 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.

[0070] The servo motor of the linear movement module is electrically connected with the controller, and the rotation speed and direction thereof can be accurately controlled through the controller, so as to adjust the moving speed and displacement of the sliding table.

[0071] Through the linear movement 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 stranding wire 100 according to actual needs.

[0072] The embodiment of the application also provides a control method of the aviation cable stranding machine, which comprises the following steps: S10-S30.

[0073] S10, the tension of the cable is detected in real time by a tension sensor.

[0074] Before detection, the tension sensor needs to be calibrated. After the aviation cable stranding machine is started, the single wire is released from the cable collecting drum 11 and transmitted to the downstream first wire stabilizing mechanism 7 through the detection end of the tension sensor.

[0075] When the pay-off tension is detected, the tension sensor collects the pressure signal of the single wire on the detection surface in real time, converts the pressure signal into an electric signal and transmits the electric signal to the controller. The controller calculates the real-time pay-off tension value (unit: N) according to the preset electric signal and tension value calibration curve. The detection sampling frequency is set to 100 Hz, so as to ensure that the instantaneous tension change can be captured.

[0076] When the tension fluctuation frequency is detected: 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 changing with time, and the main frequency component is the "tension fluctuation frequency" (unit: Hz). For example, when the single wire vibrates at a high frequency due to high-speed transmission, the tension value will fluctuate periodically, and the main frequency (such as 120 Hz) of the fluctuation can be obtained after FFT transformation, which reflects the severity of the vibration.

[0077] 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 a local database, facilitating 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 0.3-0.5N, and the fluctuation frequency threshold is ≤100Hz), and triggers the subsequent adjustment step when the detected value exceeds the threshold.

[0078] S20, if the pay-off tension is detected to increase, the airflow of the airflow nozzle is increased, and if the pay-off tension is detected to decrease, the airflow of the airflow nozzle is decreased.

[0079] The airflow regulating valve 73 is an electromagnetic proportional regulating valve, the control end of which is electrically connected to the controller, and 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 correlated with the valve opening).

[0080] Before adjustment, the corresponding relationship between the pay-off tension and the opening of the airflow regulating valve 73 needs to be established. Specifically, the optimal airflow intensity for maintaining stable transmission of the single wire under different pay-off tensions can be tested through experiments, for example, when the pay-off tension is 0.3N (lower limit of the threshold), the opening of the airflow regulating valve 73 is set to 30%, and the airflow intensity is just enough to suppress the slack swing of the single wire; when the tension is 0.5N (upper limit of the threshold), the opening is set to 70%, and the airflow intensity is sufficient to offset the swing tendency of the single wire; the valve opening data corresponding to different tensions are stored in the controller as the basis for adjustment.

[0081] The controller compares the detected pay-off tension value with the preset threshold range in real time, and when the detected pay-off tension value exceeds the upper limit of the threshold (such as greater than 0.5N) or the tension value does not exceed the upper limit but continuously increases (such as increasing from 0.4N to 0.48N within 1s, with an increase of 20%), the controller determines that the single wire has a risk of swing deviation, at which time the controller retrieves the target valve opening corresponding to the tension, outputs the PWM signal to control the airflow regulating valve 73 to increase the opening, and increases the jet airflow intensity of the airflow nozzle. For example, when the tension increases from 0.5N to 0.6N, 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 single wire is enhanced, offsetting the swing tendency caused by the increase in tension and making the single wire return to the transmission axis; at the same time, the controller continuously monitors the tension value, and when the tension falls to the threshold range (such as 0.45N), the valve opening falls to 60% to avoid excessive deviation of the single wire caused by excessive airflow.

[0082] When the detected wire tension value is lower than the lower threshold (e.g. <0.3N), or the tension value is continuously decreasing (e.g. from 0.4N to 0.32N in 1s, a decrease of 20%), the controller determines that the monomer wire is at risk of swinging, at which time the controller retrieves the target opening corresponding to the tension value, and controls the airflow regulating valve 73 to reduce the opening, thereby reducing the airflow intensity of the airflow nozzle. For example, when the tension decreases from 0.3N to 0.2N, the valve opening decreases from 30% to 15%, and after the airflow intensity is reduced, the swinging monomer wire is prevented from being blown off by excessive airflow; when the tension rises to 0.35N, the opening is adjusted back to 40%, ensuring that the airflow can stabilize the monomer wire without causing additional tension.

[0083] S30, if the frequency of the tension fluctuation is detected to be increasing, the output current of the adjustable power supply is increased, and if the frequency of the tension fluctuation is detected to be decreasing, the output current of the adjustable power supply is decreased.

[0084] The output current range of the adjustable power supply is matched with the number of turns of the excitation coil 83 (e.g. in the present embodiment, the number of turns of the coil is 800, and the current range is 0.5-5A), the current size is positively correlated with the magnetic field strength 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).

[0085] Before adjustment, the corresponding relationship between the frequency of the tension fluctuation and the current of the adjustable power supply needs to be established: through experimental tests, the optimal current value that makes the amplitude of the monomer wire vibration ≤0.1mm under different fluctuation frequencies is determined. For example, when the fluctuation frequency is 100Hz (upper threshold), the current is set to 2A, and the damping force just suppresses the high-frequency vibration; when the frequency is 150Hz (50% above the threshold), the current is set to 3.5A, and the damping force is significantly enhanced; the current data corresponding to different frequencies are stored in the controller as a reference for adjustment.

[0086] The controller compares the detected tension fluctuation frequency with the preset threshold range in real time. When the fluctuation frequency is detected to be above the upper threshold (e.g. >100Hz), or the frequency is not above the upper threshold but is continuously increasing (e.g. from 80Hz to 98Hz in 1s, an increase of 22.5%), the controller determines that the monomer wire vibration is increasing, 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 100Hz to 120Hz, the current increases from 2A to 2.8A, 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 cooperates to rapidly 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 90Hz, the current is adjusted back to 1.8A, to avoid excessive damping force affecting the transmission speed of the monomer wire.

[0087] When the fluctuation frequency is detected to be lower than the lower threshold (e.g. < 50 Hz), or the frequency continues to decrease (e.g. from 100 Hz to 60 Hz in 1 s, a decrease of 40%), the controller determines that the single-wire vibration has been effectively suppressed. At this time, if the high current is maintained, it will cause excessive damping force, increase the transmission resistance of the single-wire, and the controller retrieves the target current value corresponding to the frequency to control 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. After the damping force is weakened, the transmission resistance of the single-wire decreases, avoiding the increase of tension caused by excessive damping. When the frequency stabilizes at 80 Hz, the current is maintained at 1.6 A, ensuring that the damping force matches the vibration intensity.

[0088] In an embodiment, the control method of the aviation cable stranding machine further comprises the following steps: S40-S50.

[0089] S40, the contact pressure between the elastic pad and the cable is detected in real time by the pressure detector.

[0090] The controller presets a contact pressure threshold range, including a minimum threshold (e.g. 0.1 MPa, below which the clamping force is insufficient) and a maximum threshold (e.g. 0.5 MPa, above which the clamping force is too large).

[0091] When the stranded wire 100 enters the flexible clamping mechanism after being stranded by the parallel line die 5, 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 stranded wire 100 in real time, and transmits the voltage value converted from the signal 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 50 Hz.

[0092] For example, there are 8 groups of pressure sensors, and the controller calculates the average value of the 8 groups of pressure sensors on the same circumferential surface. If the detection value of a pressure sensor deviates from the average value by more than 5%, it is determined that the pressure in that direction is uneven (e.g. the stranded wire 100 deviates to the side of the fixed clamping block, causing the pressure on the fixed side to be too high and the pressure on the movable side to be too low); at the same time, the average values of the 3 groups of sensors in the axial direction are compared, and if the deviation between the groups is greater than 5%, it is determined that the pressure distribution in the length direction of the stranded wire 100 is uneven.

[0093] S50, if the contact pressure between the elastic pad and the cable is detected to be less than the minimum threshold, the extension distance of the piston rod of the clamping cylinder to the cable is controlled.

[0094] The controller compares the detected contact pressure values with the preset minimum threshold value in real time. If the pressure values of all detection points are lower than the minimum threshold value (e.g., generally 0.07 MPa, lower than the threshold value 0.1 MPa), and the uniformity deviation is within the allowable range, the controller determines that the overall clamping force is insufficient. At this time, the controller calls 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 uniformly extend by the difference.

[0095] If only the pressure value in one direction (e.g., the side of the movable clamping block) is lower than the minimum threshold value, the controller determines that the partial clamping force is insufficient due to the offset of the twisted wire 100. At this time, the controller does not perform overall extension of the piston rod, but outputs a small deflection command of the piston rod (the clamping cylinder supports small-angle deflection adjustment, and the deflection range is ±1°), so that the movable clamping block tilts to the side with low pressure, increasing the contact area and pressure of the elastic pad and the twisted wire 100 on that side.

[0096] 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 range 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 to the cable is controlled.

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