CN114420376A - Phase trimming equipment and phase trimming process for high-sealing-performance cable assembly - Google Patents
Phase trimming equipment and phase trimming process for high-sealing-performance cable assembly Download PDFInfo
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- CN114420376A CN114420376A CN202210129758.XA CN202210129758A CN114420376A CN 114420376 A CN114420376 A CN 114420376A CN 202210129758 A CN202210129758 A CN 202210129758A CN 114420376 A CN114420376 A CN 114420376A
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- 238000009966 trimming Methods 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000005520 cutting process Methods 0.000 claims abstract description 7
- 238000001514 detection method Methods 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 9
- 238000003466 welding Methods 0.000 claims description 5
- 238000012545 processing Methods 0.000 abstract description 14
- 238000005516 engineering process Methods 0.000 abstract description 7
- 238000007730 finishing process Methods 0.000 abstract 1
- 238000012797 qualification Methods 0.000 abstract 1
- 238000009434 installation Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
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- 230000000712 assembly Effects 0.000 description 2
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- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/12—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for removing insulation or armouring from cables, e.g. from the end thereof
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Abstract
The invention relates to phase trimming equipment and a phase trimming process for a high-tightness cable assembly, and belongs to the technical field of high-frequency cable processing. The finishing process mainly comprises the following steps: blanking, pre-installing a connector, detecting the electrical length, finishing a wire core and detecting the electrical length of a finished product; the technology utilizes a trimming device for processing, which mainly comprises a stepping annular conveyor, a measuring assembly and a trimming assembly, wherein the measuring assembly and the trimming assembly are arranged on two sides of the stepping annular conveyor, the stepping annular conveyor circularly conveys a preassembled cable, the actual electrical length of the preassembled cable in the measuring assembly is measured, the trimming assembly cuts off a wire core with excessive length, a cutter is arranged in a trimming machine head of the trimming assembly, feeding is realized through a permanent magnet and an electromagnet on the outer side, a photoelectric sensor is matched with a servo electric push rod to determine the cutting length, when the device is used for trimming, the one-time qualification rate is more than 99.5%, the processing efficiency reaches 2800 pieces, and the quality and the efficiency are far higher than those of the prior art.
Description
Technical Field
The invention belongs to the technical field of high-frequency cable processing, and particularly relates to phase trimming equipment and a phase trimming process for a high-sealing cable assembly.
Background
With the development of science and technology, especially the high-speed development of electronic industry, communication and information industry, electronic equipment used at present stage has been gradually developed from an initial low-frequency analog circuit to a high-frequency digital circuit, and the latter has faster capability of processing data and wider application range, so that the electronic equipment is more easily accepted by the development of high-end science and technology;
high-performance phase-stable cable assemblies are commonly used as signal transmission assemblies on integrated equipment such as phased array radars and the like, in the phased array radars, a multi-channel receiver synthesis broadband imaging technology is usually adopted, the phases of the multi-channel receiver synthesis broadband imaging technology are inconsistent, the accuracy and the resolution are influenced, the simultaneous addition of multi-channel received signals is influenced, the main lobe of a useful signal is widened, and the resolution of the distance is influenced, so that the arrival time and the arrival direction (namely the phase) of the signal are required to meet certain requirements;
due to the influence of the cable material and the processing technology, the propagation rates of the cables at various points cannot be absolutely consistent, so that the signals have certain time and direction difference when passing through the cables with the same physical length, and therefore, the actual electrical length of the cables is required to be consistent when the signals are controlled to be consistent.
The processing of the stable looks cable of high leakproofness still mainly uses manual work to process as leading among the prior art, and the cable after the unloading is measured, is pruned by artifical repetition, and production efficiency is difficult to promote, and the uniformity of cable quality is difficult to guarantee.
Disclosure of Invention
In order to solve the technical problems mentioned in the background art, the invention provides a phase trimming device and a trimming process for a high-tightness cable assembly.
The purpose of the invention can be realized by the following technical scheme:
a high-tightness cable assembly phase trimming process comprises the following steps:
step S1: designing a blanking length of the high-sealing-performance cable coiled material according to working conditions, and blanking by using a wire shearing machine to obtain a batch of blank wires;
step S2: polishing the wire cores at one end of the blank wire and welding a connector, and stripping the wire cores at the other end of the blank wire by using a wire stripper to expose the wire cores to obtain a pre-installed cable;
step S3: adjusting the mounting height of an upper clamping seat of finishing equipment, clamping a pre-installed cable between the upper clamping seat and a lower clamping seat, conveying the pre-installed cable to a detection end of a vector network analyzer by a stepping annular conveyor, driving a detection port of the vector network analyzer to be communicated with a connector of the pre-installed cable by a pneumatic clamping head, opening the other end of the pre-installed cable, measuring the electrical length of the pre-installed cable, counting the measured electrical length as an absolute length and marking the pre-installed cable by a controller, comparing all measured electrical length values by the controller after all the electrical lengths of the same batch of pre-installed cables are measured, counting the minimum electrical length as a calibration length, and calculating the difference value between the absolute length and the calibration length as an intercepted length;
step S4: conveying the pre-installed cable measured in the step S3 to the upper part of a finishing machine head through a stepping annular conveyor, moving the finishing machine head upwards, determining the intercepting length by matching with a photoelectric sensor, and then finishing and cutting the wire core of the pre-installed cable by a cutter to obtain the finished cable;
step S5: and welding a connector to the cable core end of the trimmed cable, and detecting the electrical length again, wherein the detected electrical length of the same batch of cables is qualified within a tolerance range.
Further, in step S1Wherein l is the required length of the trimmed cable, λ is the wavelength of the application condition of the trimmed cable, and ε is the dielectric constant of the cable coil.
Furthermore, the trimming device comprises a stepping annular conveyor, wherein a measuring assembly is arranged on one side of the stepping annular conveyor and used for measuring the electrical length of the pre-installed cable, and a trimming assembly is arranged on the other side of the stepping annular conveyor and used for cutting off the long wire core;
the stepping type annular conveyor comprises an upper conveying chain plate and a lower conveying chain plate, a support rod is fixed between the upper conveying chain plate and the lower conveying chain plate, the bottom of the support rod is fixedly connected with a lower clamping seat, an upper clamping seat is arranged above the lower clamping seat, the upper clamping seat is sleeved on the support rod and is fixedly connected with the support rod through a clamping hoop, and the bayonet ends of the upper clamping seat and the lower clamping seat extend to the outer side of the stepping type annular conveyor;
the measuring assembly comprises a vector network analyzer, the detection end of the vector network analyzer is positioned above the upper clamping seat, the detection port of the vector network analyzer moves up and down by being clamped by the pneumatic clamping head, and the moving stroke of the pneumatic clamping head is adjusted according to the position of the upper clamping seat in advance;
the trimming assembly comprises a rack and a trimming machine head arranged on the rack, the trimming machine head comprises an outer barrel, a photoelectric sensor is arranged on the upper end face of the outer barrel, an inner barrel is arranged in the middle of the outer barrel, the inner barrel and the bottom wall of the outer barrel are rotatably arranged through a bearing, a plurality of electromagnets are fixed on the inner wall of the outer barrel and are of a fan-ring structure, the electromagnets form a ring shape, a plurality of permanent magnets are arranged on the outer side of the inner ring and have the same structure as the electromagnets, a guide rod is fixed on the outer side wall of the inner barrel along the radial direction of the inner barrel, the guide rod penetrates through the permanent magnet and is limited on the outer side of the permanent magnet by a snap ring, an opening is formed in the position where the guide rod penetrates through the permanent magnet and is used for sliding the permanent magnet on the guide rod to move, a reset spring is sleeved on the outer side of the guide rod between the permanent magnet and the inner barrel, a cutter frame rod is fixed on the end face of the permanent magnet close to the inner barrel, and a cutter is fixed on the inner side of the cutter frame rod penetrating through the inner barrel and extending to the inner barrel, when finishing, the electromagnet is electrified, so that the polarities of the near ends of the electromagnet and the permanent magnet are the same, and under the action of a repulsive force, the permanent magnet is folded towards the middle, so that the cutter is pushed to fold, and the wire core is cut off;
furthermore, the main rear knife face of the cutter is an arc face, and the core does not need to be polished after being cut off;
the bottom of urceolus is fixed with the bracket, the below at bracket middle part is provided with driving motor, driving motor passes through mounting bracket and bracket fixed connection, driving motor's output passes the bottom fixed connection of bracket and inner tube, it is rotatory to drive the inner tube through driving motor, the below equipartition of bracket border position has servo electric putter, servo electric putter's installation end and frame fixed mounting, promote urceolus and inner tube synchronous motion through servo electric putter, photoelectric sensor cooperation servo electric putter's feed speed can calculate the length of stretching into of the sinle silk of pre-installation cable, the distance between rethread calibration cutter and the photoelectric sensor, can calculate the intercepting length of sinle silk.
The invention has the beneficial effects that:
1. the invention provides a trimming process of a high-sealing cable assembly, which is characterized in that the blanking length is reasonably determined, and the actual electrical length of a cable is detected by a dynamic vector network analyzer, so that the quality consistency of products is greatly improved, and a foundation is provided for high-precision detection equipment.
2. The invention provides trimming equipment, which realizes the integrated production of measurement, trimming and detection of a high-tightness cable assembly, the primary qualified rate is more than 99.5%, the processing efficiency reaches 2800 cables per bench, and the quality and the efficiency are far higher than those of the prior art.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural view of a phase trimming apparatus for a high-hermeticity cable assembly according to the present invention;
FIG. 2 is a schematic top view of the trimmer head of the present invention;
FIG. 3 is a schematic view of a finishing head according to the present invention in partial cross-section;
in the figure:
11. a step-by-step endless conveyor; 12. a lower clamping seat; 13. a measurement assembly; 14. a vector network analyzer; 15. an upper clamping seat; 16. a strut; 17. a trim component; 18. trimming a machine head; 21. an outer cylinder; 22. a permanent magnet; 23. a cutter; 24. a guide bar; 25. a return spring; 26. an inner barrel; 27. a photosensor; 31. a servo electric push rod; 32. a bracket; 33. an electromagnet.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The present embodiment provides a trimming apparatus for a high-hermeticity cable assembly, please refer to fig. 1-3, the trimming apparatus includes a stepping ring conveyor 11, a measuring assembly 13 is disposed on one side of the stepping ring conveyor 11 for measuring the electrical length of a pre-installed cable, and a trimming assembly 17 is disposed on the other side of the stepping ring conveyor 11 for cutting off an elongated wire core;
the stepping type annular conveyor 11 comprises an upper conveying chain plate and a lower conveying chain plate, a support rod 16 is fixed between the upper conveying chain plate and the lower conveying chain plate, the bottom of the support rod 16 is fixedly connected with a lower clamping seat 12, an upper clamping seat 15 is arranged above the lower clamping seat 12, the upper clamping seat 15 is sleeved on the support rod 16, the upper clamping seat 15 is fixedly connected with the support rod 16 through a clamping hoop, and bayonet ends of the upper clamping seat 15 and the lower clamping seat 12 extend to the outer side of the stepping type annular conveyor 11;
the measuring component 13 comprises a vector network analyzer 14, the detection end of the vector network analyzer is positioned above the upper clamping seat 15, the detection port of the vector network analyzer 14 is clamped by a pneumatic clamping head to move up and down, and the moving stroke of the pneumatic clamping head is adjusted according to the position of the pre-installed upper clamping seat 15;
the trimming component 17 comprises a rack and a trimming machine head 18 arranged on the rack, the trimming machine head 18 comprises an outer barrel 21, a photoelectric sensor 27 is arranged on the upper end face of the outer barrel 21, an inner barrel 26 is arranged in the middle of the outer barrel 21, the inner barrel 26 and the bottom wall of the outer barrel 21 are rotatably arranged through a bearing, a plurality of electromagnets 33 are fixed on the inner wall of the outer barrel 21, the electromagnets 33 are of a fan-ring structure, the electromagnets 33 form a ring shape, a plurality of permanent magnets 22 are arranged on the outer side of the inner ring, the permanent magnets 22 and the electromagnets 33 are of the same structure, a guide rod 24 is fixed on the outer side wall of the inner barrel 26 along the radial direction of the inner barrel 26, the guide rod 24 penetrates through the permanent magnets 22 and is limited on the outer side of the permanent magnets 22 through a snap ring, a reset spring 25 is sleeved on the outer side of the guide rod 24 between the permanent magnets 22 and the inner barrel 26, a cutter frame rod is fixed on the end face of the permanent magnets 22 close to the inner barrel 26, the cutter frame rod penetrates through the inner barrel 26 and extends to the inner side of the inner barrel 26 and is fixed with a cutter 23, when trimming is carried out, the electromagnet 33 is electrified, so that the polarities of the near ends of the electromagnet 33 and the permanent magnet 22 are the same, under the action of a repulsive force, the permanent magnet 22 is folded towards the middle, the cutter 23 is further pushed to be folded, and the wire core is cut off;
the main rear knife face of the cutter 23 is an arc face, and the core does not need to be polished after being cut off;
the bottom of urceolus 21 is fixed with bracket 32, the below at the middle part of bracket 32 is provided with driving motor, driving motor passes through mounting bracket and bracket 32 fixed connection, driving motor's output passes the bottom fixed connection of bracket 32 and inner tube 26, it is rotatory to drive inner tube 26 through driving motor, the below equipartition of bracket 32 border position has servo electric putter 31, servo electric putter 31's installation end and frame fixed mounting, promote urceolus 21 and inner tube 26 synchronous motion through servo electric putter 31, photoelectric sensor 27 cooperates the feed speed of servo electric putter 31 can calculate the length of stretching into of the sinle silk of pre-installation cable, the distance between rethread calibration cutter 23 and the photoelectric sensor 27, can calculate the intercepting length of sinle silk.
The finishing equipment is also provided with a control system, including a control system for controlling the conveying of the stepping ring conveyor 11, a pneumatic chuck for driving the detection port to move, a control system for detecting the length mark of the cable, the feeding, starting and stopping of the finishing head 18 and the like, which belong to the prior art.
Example 2
In this embodiment, a batch of phase-stabilized cables are manufactured, and are processed by using the trimming apparatus provided in embodiment 1, as shown in fig. 1 to 3, specifically including the following steps:
step S1: taking the high-sealing cable coiled material to determine the blanking length according to the required length l of the cable finished product, the wavelength lambda of the application working condition and the dielectric constant epsilon of the cable coiled material, wherein the specific conversion mode is as follows:
k is an expansion coefficient, is related to the material and the processing technology of a cable core, is determined by testing when a cable coiled material is purchased, and is generally 1-3, in the embodiment, k is 2, and a trimming machine is adopted for blanking according to the blanking length to obtain a batch of blank wires;
step S2: polishing the wire cores at one end of the blank wire, trimming burrs at the end part to avoid connecting a virtual position, welding a connector, and stripping the wire cores at the other end of the blank wire by using a wire stripper to obtain a preassembled cable;
step S3: adjusting the installation height of an upper clamping seat 15 of a trimming device, clamping a pre-installed cable between the upper clamping seat 15 and a lower clamping seat 12, conveying the pre-installed cable to a detection end of a vector network analyzer 14 by a stepping type annular conveyor 11, driving a detection port of the vector network analyzer 14 to be communicated with a connector of the pre-installed cable by a pneumatic clamping head, measuring the electrical length of the pre-installed cable by opening the other end of the pre-installed cable, counting the measured electrical length as an absolute length by a controller and marking the pre-installed cable, comparing all measured electrical length values by the controller after all the electrical lengths of the same batch of pre-installed cables are measured, counting the minimum electrical length as a calibration length, and calculating the difference value between the absolute length and the calibration length as an intercepted length;
step S4: the pre-installed cable measured in the step S3 is conveyed to the upper side of the finishing machine head 18 by the stepping ring conveyor 11, the finishing machine head 18 moves upwards, the cutting length is determined by matching with the photoelectric sensor 27, and then the cutter 23 performs finishing cutting on the wire core of the pre-installed cable to obtain a finished cable;
step S5: and welding a connector on the wire core end of the repaired cable, detecting the electrical length again, packaging the repaired cable within the design tolerance range, and recycling the unqualified repaired cable which is lower than the design electrical length for the manual repair of which the electrical length exceeds the design range.
Example 3
In this example, a batch of cables for phased array radar was prepared, the specific implementation process was the same as in example 2, and the determination was made according to the detection
Counting the processing quality and the processing efficiency of the embodiment 2 and the embodiment 3, wherein the first-time qualified rate of the embodiment 2 is 99.8 percent, and the processing efficiency is 3200 pieces/table; wherein the first pass yield of the embodiment 3 is 99.5%, the processing efficiency is 2800 pieces/table, and the processing quality and efficiency are far higher than those of manual trimming.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is merely exemplary and illustrative of the principles of the present invention and various modifications, additions and substitutions of the specific embodiments described herein may be made by those skilled in the art without departing from the principles of the present invention or exceeding the scope of the claims set forth herein.
Claims (8)
1. The phase trimming equipment for the high-sealing-performance cable assembly comprises a stepping annular conveyor (11), and is characterized in that a measuring assembly (13) is arranged on one side of the stepping annular conveyor (11), and a trimming assembly (17) is arranged on the other side of the stepping annular conveyor (11);
the trimming component (17) comprises a rack and a trimming machine head (18) installed on the rack, the trimming machine head (18) comprises an outer barrel (21) and an inner barrel (26), the inner barrel (26) is arranged in the outer barrel (21) and is rotatably installed with the outer barrel (21), a plurality of electromagnets (33) are fixed on the inner wall of the outer barrel (21), a plurality of permanent magnets (22) are arranged on the outer side of an inner ring, a cutter rest rod is fixed on the end face, close to the inner barrel (26), of each permanent magnet (22), the cutter rest rod penetrates through the inner barrel (26) and extends to the inner side of the inner barrel (26), the inner barrel (26) is driven to rotate by a driving motor arranged below the outer barrel (21), the outer barrel (21) moves up and down by a servo electric push rod (31) arranged below the outer barrel, and a photoelectric sensor (27) is arranged on the upper end face of the outer barrel (21).
2. The phase trimming device for the high-sealability cable assembly according to claim 1, wherein the electromagnet (33) is of a fan-ring structure, and a plurality of electromagnets (33) are combined into a ring shape, and the permanent magnet (22) has the same structure as the electromagnet (33).
3. The phase trimming device for the high-sealability cable assembly according to claim 1, wherein a guide rod (24) is fixed on the outer side wall of the inner cylinder (26) along the radial direction of the inner cylinder (26), the guide rod (24) penetrates through the permanent magnet (22) and is limited at the outer side of the permanent magnet (22) by a snap ring, a return spring (25) is sleeved on the outer side of the guide rod (24), and the return spring (25) is positioned between the permanent magnet (22) and the inner cylinder (26).
4. The phase trimming apparatus for high sealability cable assembly according to claim 1, wherein the main flank surface of the cutter (23) is a circular arc surface.
5. The phase trimming device for the high-tightness cable assembly according to claim 1, wherein the stepping ring conveyor (11) comprises an upper conveying chain plate and a lower conveying chain plate, a support rod (16) is fixed between the upper conveying chain plate and the lower conveying chain plate, a lower clamping seat (12) is fixedly connected to the bottom of the support rod (16), an upper clamping seat (15) is arranged above the lower clamping seat (12), the upper clamping seat (15) is sleeved on the support rod (16), the upper clamping seat (15) is fixedly connected with the support rod (16) through a clamping hoop, and bayonet ends of the upper clamping seat (15) and the lower clamping seat (12) extend to the outer side of the stepping ring conveyor (11).
6. The phase trimming device for a high-hermeticity cable assembly according to claim 5, wherein the measuring assembly (13) comprises a vector network analyzer (14), a detection end of which is positioned above the upper clamping seat (15), and a detection port of the vector network analyzer (14) is moved up and down by a pneumatic chuck.
7. A phase trimming process for a high-sealability cable assembly, which is characterized by being processed by the trimming equipment of any one of claims 1 to 6, and specifically comprising the following steps:
step S1: taking a cable coiled material, and blanking according to the designed blanking length to obtain a batch of blank lines;
step S2: a connector is installed at one end of the blank line, and a head of the other end of the blank line is stripped to expose the wire core, so that a pre-installed cable is obtained;
step S3: debugging the height of an upper clamping seat (15), clamping a preassembled cable, conveying the preassembled cable to a vector network analyzer (14) by a stepping type annular conveyor (11), detecting the electrical length of the preassembled cable, and calculating the absolute length, wherein the electrical length of the same batch of preassembled cables is measured, the minimum absolute length value is calculated as a calibration length, and the difference value between the absolute length and the calibration length is calculated as an interception length;
step S4: the step type annular conveyor (11) conveys the pre-installed cable measured in the step S3 to the position above the trimming machine head (18), and the trimming machine head (18) trims and cuts the wire cores of the pre-installed cable according to the cutting length to obtain a trimmed cable;
step S5: and welding a connector to the cable core end of the trimmed cable, and detecting the electrical length again, wherein the detected electrical length of the same batch of cables is qualified within a tolerance range.
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN117439006A (en) * | 2023-12-20 | 2024-01-23 | 江苏洪能电缆有限公司 | Military high-voltage cable wiring system |
CN117439006B (en) * | 2023-12-20 | 2024-03-15 | 江苏洪能电缆有限公司 | Military high-voltage cable wiring system |
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Application publication date: 20220429 |