A lightweight radio frequency microwave cable and a manufacturing method thereof

Abstract

The invention relates to the technical field of cable manufacturing, and in particular to a lightweight radio frequency microwave cable and a manufacturing method thereof, comprising: obtaining a silver-plated copper conductor; extruding a PTFE microporous medium through an extruder, and coating the PTFE microporous medium on the silver-plated copper conductor with a stretching machine to form a dielectric layer; spirally winding a silver-plated flat copper strip on the PTFE microporous medium to form an outer conductor, determining whether the process of spirally winding the silver-plated flat copper strip is qualified based on a deviation characterization parameter of the silver-plated flat copper strip relative to the axis of the PTFE microporous medium, and determining whether to increase the extrusion temperature or extrusion pressure of the extruder according to the relative difference between the deviation characterization parameter and a deviation characterization parameter threshold; winding 1 / 2 of a polyimide aluminum foil folded edge on the outer conductor to form an electromagnetic shielding layer, weaving silver-plated copper wires on the outside of the electromagnetic shielding layer to form a braided shielding layer, and extruding a fluoroplastic sheath outside the braided shielding layer to form a sheath. The invention improves the manufacturing efficiency of the dielectric layer of the radio frequency microwave cable.

Description

Technical Field

[0001] The present invention relates to the technical field of cable manufacturing, and in particular to a lightweight radio frequency microwave cable and a manufacturing method thereof. Background Art

[0002] In airborne or satellite communication systems, RF microwave cables play a core role in signal transmission, and their performance has a direct impact on the stability and reliability of the entire system. With the rapid development of aerospace technology, the demand for lightweight communication equipment is becoming increasingly urgent, which poses new challenges to the design and manufacture of RF microwave cables. Traditional RF microwave cables use more complex structural designs and heavy materials, resulting in a large overall weight, which makes it difficult to meet the high requirements for lightweight equipment in the aerospace field. In the aerospace field, lightweighting is crucial to improving the fuel efficiency, load capacity and maneuverability of aircraft. Therefore, developing an RF microwave cable that has both high performance and lightweight has become an important direction for the current development of aerospace technology.

[0003] Chinese patent application publication number: CN109390652A discloses a method for manufacturing a radio frequency cable, including the following steps: 1) heating the copper wire; 2) pressing the heated copper wire with at least one set of rolling rollers; 3) drawing the pressed copper wire with a wire drawing die to finally obtain an inner conductor. This manufacturing method can improve the tensile properties of the copper wire when it cooperates with the rolling roller and the wire drawing die by heating the copper wire, which is convenient for processing while effectively ensuring the tensile quality and reducing the probability of defects; the copper wire is initially drawn thin by rolling, and finally an inner conductor of corresponding size is obtained by a wire drawing die. However, the prior art has the following problems: the prior art does not refine the manufacturing process of the dielectric layer of the radio frequency microwave cable, resulting in low manufacturing quality of the dielectric layer of the radio frequency microwave cable, increasing the loss and rework rate in the production process, thereby leading to the problem of low manufacturing efficiency of the dielectric layer of the radio frequency microwave cable. Summary of the invention

[0004] To this end, the present invention provides a lightweight radio frequency microwave cable and a manufacturing method thereof, so as to overcome the problem of low manufacturing efficiency of the dielectric layer of the radio frequency microwave cable in the prior art.

[0005] To achieve the above object, the present invention provides a lightweight radio frequency microwave cable and a manufacturing method thereof, comprising:

[0006] Get silver-plated copper conductors;

[0007] The PTFE microporous medium is extruded by a pusher, and the PTFE microporous medium is coated on the silver-plated copper conductor by a stretching machine to form a dielectric layer, and the bonding state of the PTFE microporous medium and the silver-plated copper conductor is determined based on the gap between the PTFE microporous medium and the silver-plated copper conductor;

[0008] In the case where the lamination state is unqualified, determining whether there are bubbles on the inner surface of the PTFE microporous medium;

[0009] In the case where it is determined that bubbles exist, determining to increase the stretching rate of the stretching machine based on the difference between the bubble evaluation value and the preset bubble evaluation value;

[0010] When it is determined that there are no bubbles, increasing the extrusion rate of the pusher based on the condition that the PTFE microporous medium is unevenly distributed on the silver-plated copper conductor;

[0011] The silver-plated flat copper strip is spirally wound on the PTFE microporous medium to form an outer conductor, and whether the process of spirally winding the silver-plated flat copper strip is qualified is determined based on the deviation characterization parameter of the silver-plated flat copper strip relative to the axis of the PTFE microporous medium, and the extrusion temperature or extrusion pressure of the extruder is increased according to the relative difference between the deviation characterization parameter and the deviation characterization parameter threshold;

[0012] A 1 / 2 folded edge of polyimide aluminum foil is wound on the outer conductor to form an electromagnetic shielding layer, silver-plated copper wire is woven outside the electromagnetic shielding layer to form a braided shielding layer, and a fluoroplastic sheath is extruded outside the braided shielding layer to form a sheath.

[0013] Furthermore, under the condition that the PTFE microporous medium material is coated on the silver-plated copper conductor, it is determined that the bonding state between the PTFE microporous medium and the silver-plated copper conductor is unqualified based on the comparison result that the gap between the PTFE microporous medium and the silver-plated copper conductor is greater than the preset gap.

[0014] Furthermore, based on the comparison result that the bubble evaluation value of the inner surface of the PTFE microporous medium is greater than a preset bubble evaluation value, it is determined that bubbles exist on the inner surface of the PTFE microporous medium, and based on the comparison result that the difference between the bubble evaluation value and the preset bubble evaluation value is less than or equal to the preset difference, it is determined to increase the stretching rate of the stretching machine by a first preset stretching adjustment coefficient.

[0015] Furthermore, based on the comparison result that the bubble evaluation value of the inner surface of the PTFE microporous medium is greater than a preset bubble evaluation value, it is determined that bubbles exist on the inner surface of the PTFE microporous medium, and based on the comparison result that the difference between the bubble evaluation value and the preset bubble evaluation value is greater than the preset difference, it is determined to increase the stretching rate of the stretching machine by a second preset stretching adjustment coefficient.

[0016] Further, based on a comparison result that the ratio of the distribution uniformity value to the preset distribution uniformity value is less than or equal to the preset ratio, it is determined that the extrusion rate of the pusher is increased by a first preset extrusion adjustment coefficient.

[0017] Further, based on the comparison result that the ratio of the distribution uniformity value to the preset distribution uniformity value is greater than the preset ratio, it is determined to increase the extrusion rate of the pusher by a second preset extrusion adjustment coefficient.

[0018] Furthermore, based on the comparison result that the deviation characterization parameter of the silver-plated flat copper strip relative to the axis of the PTFE microporous medium is greater than the deviation characterization parameter threshold, it is determined that the spiral winding process of the silver-plated flat copper strip is unqualified.

[0019] Further, based on the comparison result that the relative difference between the deviation characterization parameter and the deviation characterization parameter threshold is less than or equal to the preset relative difference, it is determined to increase the extrusion temperature of the pusher by a preset temperature adjustment coefficient.

[0020] Furthermore, based on the comparison result that the relative difference between the deviation characterization parameter and the deviation characterization parameter threshold is greater than a preset relative difference, it is determined that the extrusion pressure of the pusher is increased by a preset pressure adjustment coefficient.

[0021] Another aspect of the present invention further provides a lightweight radio frequency microwave cable, comprising:

[0022] conductor,

[0023] A dielectric layer, which is arranged outside the conductor to protect the conductor;

[0024] An outer conductor, which is arranged outside the dielectric layer to shield external interference signals;

[0025] An electromagnetic shielding layer, which is arranged outside the outer conductor to shield external electromagnetic interference signals;

[0026] A braided shielding layer, which is arranged outside the electromagnetic shielding layer and is used to reduce external electromagnetic influence;

[0027] The sheath is arranged outside the braided shielding layer and is used for protecting the cable.

[0028] Compared with the prior art, the invention has the beneficial effect that the invention coats the PTFE microporous medium on the silver-plated copper conductor to form a dielectric layer through a pusher and a stretcher, checks the lamination quality and bubble situation, adjusts the extrusion rate according to the uniformity of the dielectric layer distribution, and then spirally winds the silver-plated flat copper strip to form an outer conductor, and checks the qualification of the winding process to adjust the extrusion temperature or extrusion pressure, thereby improving the overall performance and reliability of the cable. At the same time, by adjusting the process parameters, the manufacturing quality of the dielectric layer of the radio frequency microwave cable is improved, thereby improving the manufacturing efficiency of the dielectric layer of the radio frequency microwave cable.

[0029] Furthermore, the present invention determines the eligibility of the bonding between the PTFE microporous medium and the silver-plated copper conductor by comparing the gap between the two with the preset gap. When the bonding state is unqualified and bubbles exist on the inner surface of the PTFE microporous medium, the stretching rate of the stretching machine is adjusted according to the difference between the bubble evaluation value and the preset bubble evaluation value, thereby improving the bonding quality between the PTFE microporous medium and the silver-plated copper conductor, timely discovering and correcting poor bonding and bubble problems, and improving the overall quality of the cable by adjusting the stretching rate.

[0030] Furthermore, the present invention determines whether the distribution is uniform by comparing the distribution uniformity value of the PTFE microporous medium on the silver-plated copper conductor with a preset distribution uniformity value, and adjusts the extrusion rate of the pusher when it is uneven, thereby accurately controlling the distribution uniformity of the PTFE microporous medium on the silver-plated copper conductor, thereby improving production efficiency and product qualification rate.

[0031] Furthermore, the present invention determines the acceptability of the winding process by comparing the deviation characterization parameter with the deviation characterization parameter threshold after spirally winding the silver-plated flat copper strip to form an outer conductor, and for unqualified cases, increases the extrusion temperature or extrusion pressure of the pusher are adjusted according to the relative difference between the deviation characterization parameter and the deviation characterization parameter threshold, thereby ensuring the accuracy and stability of the spiral winding of the outer conductor, adjusting the extrusion temperature and extrusion pressure of the pusher, and improving the winding quality of the silver-plated flat copper strip. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a flow chart of a method for manufacturing a lightweight radio frequency microwave cable according to an embodiment of the present invention;

[0033] Figure 2 This is a schematic diagram of the structure of a lightweight radio frequency microwave cable according to an embodiment of the present invention;

[0034] Figure 3 A flow chart for determining the conformity of the PTFE microporous medium and the silver-plated copper conductor in an embodiment of the present invention;

[0035] Figure 4 A flow chart for determining the eligibility of a spiral winding process of a silver-plated flat copper strip according to an embodiment of the present invention;

[0036] In the figure, 1, conductor; 2, dielectric layer; 3, outer conductor; 4, electromagnetic shielding layer; 5, braided shielding layer; 6, sheath. DETAILED DESCRIPTION

[0037] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0038] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0039] It should be pointed out that the data in this embodiment are obtained by comprehensive analysis and evaluation of the historical test data and the corresponding historical test results of the present invention in the three months before this test. It can be understood by those skilled in the art that the present invention can determine the above parameters for a single item by selecting the highest proportion of values ​​as the preset standard parameters according to the data distribution, using weighted summation to use the obtained values ​​as the preset standard parameters, substituting each historical data into a specific formula and using the values ​​obtained by the formula as the preset standard parameters or other selection methods, as long as the present invention can clearly define different specific situations in the single determination process through the obtained values.

[0040] See also Figure 1-Figure 4 As shown, Figure 1 This is a flow chart of a method for manufacturing a lightweight radio frequency microwave cable according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of a lightweight radio frequency microwave cable according to an embodiment of the present invention; Figure 3 A flow chart for determining the conformity of the PTFE microporous medium and the silver-plated copper conductor in an embodiment of the present invention; Figure 4 The present invention is a flowchart for determining the eligibility of a spiral winding process of a silver-plated flat copper strip according to an embodiment of the present invention.

[0041] The method for manufacturing a lightweight radio frequency microwave cable according to an embodiment of the present invention comprises:

[0042] Get silver-plated copper conductors;

[0043] The PTFE microporous medium is extruded by a pusher, and the PTFE microporous medium is coated on the silver-plated copper conductor by a stretching machine to form a dielectric layer, and the bonding state of the PTFE microporous medium and the silver-plated copper conductor is determined based on the gap between the PTFE microporous medium and the silver-plated copper conductor;

[0044] In the case where the lamination state is unqualified, determining whether there are bubbles on the inner surface of the PTFE microporous medium;

[0045] In the case where it is determined that bubbles exist, determining to increase the stretching rate of the stretching machine based on the difference between the bubble evaluation value and the preset bubble evaluation value;

[0046] When it is determined that there are no bubbles, increasing the extrusion rate of the pusher based on the condition that the PTFE microporous medium is unevenly distributed on the silver-plated copper conductor;

[0047] The silver-plated flat copper strip is spirally wound on the PTFE microporous medium to form an outer conductor, and whether the process of spirally winding the silver-plated flat copper strip is qualified is determined based on the deviation characterization parameter of the silver-plated flat copper strip relative to the axis of the PTFE microporous medium, and the extrusion temperature or extrusion pressure of the extruder is increased according to the relative difference between the deviation characterization parameter and the deviation characterization parameter threshold;

[0048] A 1 / 2 folded edge of polyimide aluminum foil is wound on the outer conductor to form an electromagnetic shielding layer, silver-plated copper wire is woven outside the electromagnetic shielding layer to form a braided shielding layer, and a fluoroplastic sheath is extruded outside the braided shielding layer to form a sheath.

[0049] An embodiment of the present invention provides a lightweight radio frequency microwave cable, comprising:

[0050] Conductor 1,

[0051] A dielectric layer 2, which is arranged outside the conductor 1 to protect the conductor 1;

[0052] An outer conductor 3, which is arranged outside the dielectric layer 2 and is used to shield external interference signals;

[0053] An electromagnetic shielding layer 4, which is arranged outside the outer conductor 3 to shield external electromagnetic interference signals;

[0054] A braided shielding layer 5, which is arranged outside the electromagnetic shielding layer 4, and is used to reduce external electromagnetic influence;

[0055] The sheath 6 is arranged outside the braided shielding layer 5 and is used to protect the cable.

[0056] In the embodiment of the present invention, the conductor is a silver-plated copper conductor; the dielectric layer is a PTFE microporous dielectric; the outer conductor is a single-layer multi-silver-plated flat copper tape; the electromagnetic shielding layer is a polyimide aluminum foil; the braided shielding layer is a silver-plated copper wire; and the sheath is a fluoroplastic sheath.

[0057] In the embodiment of the present invention, the extruder is a single-screw extruder or a twin-screw extruder, which is not specifically limited and only needs to meet the preparation requirements.

[0058] In the embodiment of the present invention, during the manufacturing process of the lightweight radio frequency microwave cable, the cable is photographed by a camera device, and the camera device is an industrial camera or an infrared camera, which is not specifically limited.

[0059] In an embodiment of the present invention, the pusher extrude the PTFE microporous medium at an extrusion rate of 20 cm / min, an extrusion temperature of 100°C, and an extrusion pressure of 15 MPa. The extrusion rate is the average extrusion rates of several qualified medium layers prepared in the past, the extrusion temperature is the average extrusion temperatures of several qualified medium layers prepared in the past, and the extrusion pressure is the average extrusion pressures of several qualified medium layers prepared in the past.

[0060] In the embodiment of the present invention, the stretching machine is a double-roll stretching machine or a multi-roll stretching machine, which is not specifically limited and only needs to meet the preparation requirements.

[0061] In the embodiment of the present invention, the stretching machine covers the PTFE microporous medium on the silver-plated copper conductor at a stretching rate of 15 cm / min, and the stretching rate is an average of the stretching rates of several qualified medium layers prepared in the past.

[0062] Specifically, the present invention uses a pusher and a stretcher to coat the PTFE microporous medium on the silver-plated copper conductor to form a dielectric layer, and checks the lamination quality and bubble situation, adjusts the extrusion rate according to the uniformity of the dielectric layer distribution, and then spirally winds the silver-plated flat copper strip to form an outer conductor, and checks the eligibility of the winding process to adjust the extrusion temperature or extrusion pressure, thereby improving the overall performance and reliability of the cable. At the same time, by adjusting the process parameters, the manufacturing quality of the RF microwave cable dielectric layer is improved, thereby improving the manufacturing efficiency of the RF microwave cable dielectric layer.

[0063] Specifically, the embodiment of the present invention determines the eligibility of the bonding between the PTFE microporous medium and the silver-plated copper conductor according to the comparison result of the gap between the PTFE microporous medium and the silver-plated copper conductor and the preset gap of 0.1 mm;

[0064] If the gap is less than or equal to the preset gap, it is determined that the PTFE microporous medium and the silver-plated copper conductor are in good condition;

[0065] If the gap is larger than the preset gap, it is determined that the bonding state between the PTFE microporous medium and the silver-plated copper conductor is unqualified.

[0066] In the embodiment of the present invention, the preset gap value is 0.1 mm, but the above value is not limited thereto, and those skilled in the art may also adjust the value according to actual needs.

[0067] Specifically, the embodiment of the present invention calculates the gap according to the following formula, setting:

[0068] ;

[0069] Where P represents the gap, d i is the distance from the inner surface of the PTFE microporous medium to the outer surface of the silver-plated copper conductor measured at the i-th measuring point, D i is the radius of the silver-plated copper conductor measured at the i-th measuring point, the value range of i is 1-n, the measuring point is the inner surface of the PTFE microporous medium and the point mapped from the inner surface of the PTFE microporous medium to the silver-plated copper conductor, the d i With the D i All are determined through video equipment.

[0070] Specifically, in the embodiment of the present invention, under the condition that the bonding state between the PTFE microporous medium and the silver-plated copper conductor is determined to be unqualified, whether there are bubbles on the inner surface of the PTFE microporous medium is determined based on the comparison result of the bubble evaluation value on the inner surface of the PTFE microporous medium and the preset bubble evaluation value of 0.05;

[0071] If the bubble evaluation value is less than or equal to the preset bubble evaluation value, it is determined that there are no bubbles on the inner surface of the PTFE microporous medium;

[0072] If the bubble evaluation value is greater than the preset bubble evaluation value, it is determined that bubbles exist on the inner surface of the PTFE microporous medium.

[0073] In the embodiment of the present invention, the preset bubble evaluation value is 0.05, but the above value is not limited thereto, and those skilled in the art may also adjust the value according to actual needs.

[0074] Specifically, the bubble evaluation value is the ratio of the bubble area on the inner surface of the PTFE microporous medium to the inner surface area of ​​the PTFE microporous medium, and both the bubble area and the surface area are determined by the imaging device.

[0075] Specifically, under the condition that bubbles are determined to exist on the inner surface of the PTFE microporous medium, the embodiment of the present invention determines to adjust the stretching rate of the stretching machine according to the comparison result of the difference between the bubble evaluation value and the preset bubble evaluation value and the preset difference value of 0.01;

[0076] If the difference is less than or equal to the preset difference, it is determined to increase the stretching rate of the stretching machine to a corresponding value using a first preset stretching adjustment coefficient of 1.04;

[0077] If the difference is greater than the preset difference, it is determined to increase the stretching rate of the stretching machine to a corresponding value using a second preset stretching adjustment coefficient of 1.08;

[0078] The difference is the difference between the bubble evaluation value and the preset bubble evaluation value, that is, the preset bubble evaluation value is subtracted from the bubble evaluation value.

[0079] In the embodiment of the present invention, the preset difference value is 0.01, but the above value is not limited thereto, and those skilled in the art may also adjust the value according to actual needs.

[0080] In the embodiment of the present invention, the increased stretching rate is the product of the stretching rate and the nth preset stretching adjustment coefficient, and the value of n is 1 or 2. In order to ensure that the adjusted stretching rate meets the actual needs, the adjustment range should not be too large to avoid excessive stretching. In actual situations, the adjustment range can be set by technicians in this field to between 0.02 and 0.12 times the initial stretching speed. Therefore, the adjustment coefficient is set accordingly to control the adjustment range. The adjustment coefficient is set L1 to the first preset stretching adjustment coefficient of 1.04, and L2 to the second preset stretching adjustment coefficient of 1.08.

[0081] Specifically, the calculation formula of the preset stretch adjustment coefficient is expressed as:

[0082] ;

[0083] Wherein, L represents the preset stretch adjustment coefficient, H represents the bubble evaluation value, and H0 represents the preset bubble evaluation value.

[0084] Specifically, the present invention determines the eligibility of the bonding between the PTFE microporous medium and the silver-plated copper conductor by comparing the gap between the two with the preset gap. When the bonding state is unqualified and bubbles exist on the inner surface of the PTFE microporous medium, the stretching rate of the stretching machine is adjusted according to the difference between the bubble evaluation value and the preset bubble evaluation value, thereby improving the bonding quality between the PTFE microporous medium and the silver-plated copper conductor, timely discovering and correcting poor bonding and bubble problems, and improving the overall quality of the cable by adjusting the stretching rate.

[0085] Specifically, in the embodiment of the present invention, under the condition that it is determined that there are no bubbles, whether the PTFE microporous medium is evenly distributed on the silver-plated copper conductor is determined based on the comparison result of the distribution uniformity value of the PTFE microporous medium on the silver-plated copper conductor and the preset distribution uniformity value of 0.86;

[0086] If the distribution uniformity value is less than or equal to the preset distribution uniformity value, it is determined that the PTFE microporous medium is evenly distributed on the silver-plated copper conductor;

[0087] If the distribution uniformity value is greater than the preset distribution uniformity value, it is determined that the PTFE microporous medium is unevenly distributed on the silver-plated copper conductor.

[0088] In the embodiment of the present invention, the preset distribution uniformity value is 0.86, but the above value is not limited thereto, and those skilled in the art may also adjust the value according to actual needs.

[0089] Specifically, the embodiment of the present invention calculates the distribution uniformity value according to the following formula, setting:

[0090] ;

[0091] Where Q represents the distribution uniformity value, is the standard deviation of the diameter of the PTFE microporous medium, is the average value of the diameter of the PTFE microporous medium, is the standard deviation of the thickness of the PTFE microporous medium, The average value of the thickness of the PTFE microporous medium.

[0092] Specifically, in the embodiment of the present invention, under the condition that the PTFE microporous medium is determined to be unevenly distributed on the silver-plated copper conductor, the extrusion rate of the pusher is adjusted according to the comparison result of the ratio of the distribution uniformity value to the preset distribution uniformity value and the preset ratio 1.03;

[0093] If the ratio is less than or equal to the preset ratio, it is determined to increase the extrusion rate of the pusher to a corresponding value by a first preset extrusion adjustment coefficient of 1.05;

[0094] If the ratio is greater than the preset ratio, it is determined to increase the extrusion rate of the pusher to a corresponding value using a second preset extrusion adjustment coefficient of 1.09;

[0095] The ratio is a ratio of the distribution uniformity value to the preset distribution uniformity value.

[0096] In the embodiment of the present invention, the preset ratio is 1.03, but the above value is not limited thereto, and those skilled in the art may also adjust the value according to actual needs.

[0097] In the embodiment of the present invention, the increased extrusion rate is the product of the extrusion rate and the mth preset extrusion adjustment coefficient, and the value of m is 1 or 2. In order to ensure that the adjusted extrusion rate meets the actual needs, the adjustment range should not be too large. In actual situations, the adjustment range can be set by technicians in this field to between 0.02 and 0.15 times the initial extrusion rate. Therefore, the adjustment coefficient is set accordingly to control the adjustment range. The adjustment coefficient is set T1 to the first preset extrusion adjustment coefficient of 1.05, and T2 to the second preset extrusion adjustment coefficient of 1.09.

[0098] Specifically, the calculation formula of the preset extrusion adjustment coefficient is expressed as:

[0099] ;

[0100] Wherein, T represents a preset extrusion adjustment coefficient, Q represents a distribution uniformity value, and Q0 represents a preset distribution uniformity value.

[0101] Specifically, the present invention determines whether the distribution is uniform by comparing the distribution uniformity value of the PTFE microporous medium on the silver-plated copper conductor with the preset distribution uniformity value, and adjusts the extrusion rate of the pusher if it is uneven, thereby accurately controlling the distribution uniformity of the PTFE microporous medium on the silver-plated copper conductor, thereby improving production efficiency and product qualification rate.

[0102] Specifically, in the embodiment of the present invention, under the condition that the PTFE microporous medium and the silver-plated copper conductor are qualified for bonding, a silver-plated flat copper strip is spirally wound on the PTFE microporous medium to form an outer conductor.

[0103] Specifically, under the condition of forming an outer conductor, the embodiment of the present invention determines whether the process of spiral winding of the silver-plated flat copper strip is qualified according to the comparison result of the deviation characterization parameter of the silver-plated flat copper strip relative to the axis of the PTFE microporous medium and the deviation characterization parameter threshold value 0.67 during the spiral winding of the silver-plated flat copper strip;

[0104] If the deviation characterization parameter is less than or equal to the deviation characterization parameter threshold, it is determined that the spiral winding process of the silver-plated flat copper strip is qualified;

[0105] If the deviation characterization parameter is greater than the deviation characterization parameter threshold, it is determined that the spiral winding process of the silver-plated flat copper strip is unqualified.

[0106] In the embodiment of the present invention, the deviation characterization parameter threshold value is 0.67, but the above value is not limited to this, and those skilled in the art can also adjust the value according to actual needs.

[0107] Specifically, the embodiment of the present invention calculates the deviation characterization parameter according to the following formula, setting:

[0108] ;

[0109] Wherein, E represents the deviation characterization parameter, A1 is the distance from one side edge of the silver-plated flat copper strip to the axis center of the PTFE microporous medium, A2 is the distance from the other side edge of the silver-plated flat copper strip to the axis center of the PTFE microporous medium, and w is the width of the silver-plated flat copper strip. A1, A2 and w are all determined by the image taken by the camera device.

[0110] Specifically, under the condition that the spiral winding process of the silver-plated flat copper strip is determined to be unqualified, the adjustment method of the pusher is determined according to the comparison result of the relative difference between the deviation characterization parameter and the deviation characterization parameter threshold and the preset relative difference of 0.75;

[0111] If the relative difference is less than or equal to the preset relative difference, it is determined to increase the extrusion temperature of the extruder to a corresponding value by a preset temperature adjustment coefficient of 1.15;

[0112] If the relative difference is greater than the preset relative difference, it is determined to increase the extrusion pressure of the pusher to a corresponding value by a preset pressure adjustment coefficient of 1.25;

[0113] The relative difference is the relative difference between the deviation characterization parameter and the deviation characterization parameter threshold, that is, the difference between the deviation characterization parameter and the deviation characterization parameter threshold divided by the deviation characterization parameter threshold.

[0114] In the embodiment of the present invention, the preset relative difference value is 0.75, but the above value is not limited thereto, and those skilled in the art may also adjust the value according to actual needs.

[0115] In the embodiment of the present invention, the increased extrusion temperature is the product of the extrusion temperature and the preset temperature adjustment coefficient of 1.15, and the increased extrusion pressure is the product of the extrusion pressure and the preset pressure adjustment coefficient of 1.25. In order to ensure that the adjusted extrusion temperature and extrusion pressure meet the actual needs, the adjustment range should not be too large. In actual situations, the adjustment range can be set by technicians in this field to between 0.12 and 0.35 times of the initial extrusion temperature and the initial extrusion pressure, so the adjustment coefficient is set accordingly to control the adjustment range.

[0116] It is understandable that the extrusion temperature affects the fluidity of the PTFE microporous medium. Properly increasing the extrusion temperature can make the PTFE microporous medium flow more easily, thereby making it easier to evenly coat the silver-plated copper conductor and reduce the deviation when the silver-plated flat copper tape is wound. The extrusion pressure affects the density and uniformity of the PTFE microporous medium. Properly increasing the pressure can make the PTFE microporous medium more tightly coated on the silver-plated copper conductor. In actual production, by first adjusting the temperature to ensure that the PTFE microporous medium has good fluidity, and then adjusting the pressure to optimize the molding effect, invalid pressure adjustment due to insufficient temperature can be avoided.

[0117] Specifically, the calculation formula of the preset temperature adjustment coefficient is expressed as:

[0118] ;

[0119] Among them, R represents the preset temperature adjustment coefficient, E represents the deviation characterization parameter, and E0 represents the deviation characterization parameter threshold.

[0120] Specifically, the calculation formula of the preset pressure adjustment coefficient is expressed as:

[0121] ;

[0122] Wherein, W represents the preset pressure adjustment coefficient, E represents the deviation characterization parameter, and E0 represents the deviation characterization parameter threshold.

[0123] Specifically, the present invention determines the acceptability of the winding process by spirally winding a silver-plated flat copper strip to form an outer conductor, and then compares the deviation characterization parameter with the deviation characterization parameter threshold. For unqualified cases, the extrusion temperature or extrusion pressure of the pusher is increased according to the relative difference between the deviation characterization parameter and the deviation characterization parameter threshold, thereby ensuring the accuracy and stability of the spiral winding of the outer conductor, adjusting the extrusion temperature and extrusion pressure of the pusher, and improving the winding quality of the silver-plated flat copper strip.

[0124] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

[0125] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for manufacturing a lightweight radio frequency microwave cable, characterized in that: include: Get silver-plated copper conductors; The PTFE microporous medium is extruded by a pusher, and the PTFE microporous medium is coated on the silver-plated copper conductor by a stretching machine to form a dielectric layer, and the bonding state of the PTFE microporous medium and the silver-plated copper conductor is determined based on the gap between the PTFE microporous medium and the silver-plated copper conductor; In the case where the lamination state is unqualified, determining whether there are bubbles on the inner surface of the PTFE microporous medium; In the case where it is determined that bubbles exist, determining to increase the stretching rate of the stretching machine based on the difference between the bubble evaluation value and the preset bubble evaluation value; When it is determined that there are no bubbles, increasing the extrusion rate of the pusher based on the condition that the PTFE microporous medium is unevenly distributed on the silver-plated copper conductor; The silver-plated flat copper strip is spirally wound on the PTFE microporous medium to form an outer conductor, and whether the process of spirally winding the silver-plated flat copper strip is qualified is determined based on the deviation characterization parameter of the silver-plated flat copper strip relative to the axis of the PTFE microporous medium, and the extrusion temperature or extrusion pressure of the extruder is increased according to the relative difference between the deviation characterization parameter and the deviation characterization parameter threshold; A 1 / 2 folded edge of polyimide aluminum foil is wound on the outer conductor to form an electromagnetic shielding layer, silver-plated copper wire is woven outside the electromagnetic shielding layer to form a braided shielding layer, and a fluoroplastic sheath is extruded outside the braided shielding layer to form a sheath.

2. The method for manufacturing a lightweight radio frequency microwave cable according to claim 1, characterized in that: Under the condition that the PTFE microporous medium material is coated on the silver-plated copper conductor, it is determined that the bonding state between the PTFE microporous medium and the silver-plated copper conductor is unqualified based on the comparison result that the gap between the PTFE microporous medium and the silver-plated copper conductor is greater than the preset gap.

3. The method for manufacturing a lightweight radio frequency microwave cable according to claim 2, characterized in that: Based on the comparison result that the bubble evaluation value of the inner surface of the PTFE microporous medium is greater than the preset bubble evaluation value, it is determined that bubbles exist on the inner surface of the PTFE microporous medium, and based on the comparison result that the difference between the bubble evaluation value and the preset bubble evaluation value is less than or equal to the preset difference, it is determined to increase the stretching rate of the stretching machine by the first preset stretching adjustment coefficient.

4. The method for manufacturing a lightweight radio frequency microwave cable according to claim 2, characterized in that: Based on the comparison result that the bubble evaluation value of the inner surface of the PTFE microporous medium is greater than the preset bubble evaluation value, it is determined that bubbles exist on the inner surface of the PTFE microporous medium, and based on the comparison result that the difference between the bubble evaluation value and the preset bubble evaluation value is greater than the preset difference, it is determined to increase the stretching rate of the stretching machine by a second preset stretching adjustment coefficient.

5. The method for manufacturing a lightweight radio frequency microwave cable according to claim 1, characterized in that: Based on a comparison result that the ratio of the distribution uniformity value to the preset distribution uniformity value is less than or equal to the preset ratio, it is determined to increase the extrusion rate of the pusher by a first preset extrusion adjustment coefficient.

6. The method for manufacturing a lightweight radio frequency microwave cable according to claim 1, characterized in that: Based on the comparison result that the ratio of the distribution uniformity value to the preset distribution uniformity value is greater than the preset ratio, it is determined to increase the extrusion rate of the pusher by a second preset extrusion adjustment coefficient.

7. The method for manufacturing a lightweight radio frequency microwave cable according to claim 1, characterized in that: Based on the comparison result that the deviation characterization parameter of the silver-plated flat copper strip relative to the axis of the PTFE microporous medium is greater than the deviation characterization parameter threshold, it is determined that the spiral winding process of the silver-plated flat copper strip is unqualified.

8. The method for manufacturing a lightweight radio frequency microwave cable according to claim 7, characterized in that: Based on the comparison result that the relative difference between the deviation characterization parameter and the deviation characterization parameter threshold is less than or equal to the preset relative difference, it is determined to increase the extrusion temperature of the pusher by a preset temperature adjustment coefficient.

9. The method for manufacturing a lightweight radio frequency microwave cable according to claim 7, characterized in that: Based on the comparison result that the relative difference between the deviation characterization parameter and the deviation characterization parameter threshold is greater than the preset relative difference, it is determined to increase the extrusion pressure of the pusher by a preset pressure adjustment coefficient.

10. A lightweight radio frequency microwave cable, using the lightweight radio frequency microwave cable manufacturing method according to any one of claims 1 to 9, characterized in that: include: conductor, A dielectric layer, which is arranged outside the conductor to protect the conductor; An outer conductor, which is arranged outside the dielectric layer to shield external interference signals; An electromagnetic shielding layer, which is arranged outside the outer conductor to shield external electromagnetic interference signals; A braided shielding layer, which is arranged outside the electromagnetic shielding layer and is used to reduce external electromagnetic influence; The sheath is arranged outside the braided shielding layer and is used for protecting the cable.

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