Closed-loop management and control method and system for precise machining of automobile high-speed and high-frequency wire harness working procedure

Abstract

The invention belongs to the technical field of automatic production and control, and particularly relates to a closed-loop management and control method and system for precise machining of an automobile high-speed and high-frequency wire harness working procedure. By constructing a complete closed-loop system from machining to detection to feedback adjustment, intelligent management and control of the multi-process machining process of the high-speed and high-frequency wire harness of the automobile are achieved, and the consistency of the machining precision and the product quality is improved; original physical characteristics such as the bending degree of the cable are obtained in the initial machining stage and serve as input parameters of subsequent procedures, compensatory adjustment is carried out in advance, state data in the machining process are collected in real time, error analysis is carried out on a final finished product, error signals are converted into specific calibration instructions, and the calibration accuracy is improved. And the cutting, stripping and crimping parameters of the front end are dynamically adjusted, so that the process deviation caused by material difference or equipment state change is effectively compensated, and each product is ensured to meet the harsh precision standard.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of automation production and control technology, and particularly relates to a closed-loop management and control method and system for precision machining of automobile high-speed high-frequency wire harness process. BACKGROUND

[0002] In the field of modern communication and automobile electronics, as a key component for transmitting high-frequency signals, the machining quality of automobile high-speed high-frequency wire harness directly affects the signal integrity and reliability of the entire system. In the production process, the wire harness needs to go through multiple precision processes such as cutting and stripping, terminal crimping, and outer conductor installation. Any slight deviation in any link may cause signal attenuation or reflection, thereby causing functional failure. Therefore, how to ensure the consistency and high precision of automobile high-speed high-frequency wire harness in the multi-process machining process is a prominent problem currently faced by the industry.

[0003] The existing wire harness machining method has basically met the use requirements, but still has certain deficiencies, (1) the traditional wire harness machining method mainly relies on semi-automatic equipment and manual operation, which cannot effectively cope with the batch differences of raw materials and the wear and aging of the equipment itself. Fixed machining parameters are difficult to adapt to these dynamic changes, resulting in large fluctuations in product quality and unstable yield. (2) The traditional wire harness machining method mainly relies on manual sampling inspection, and the offline sampling inspection mechanism has a lag. When unqualified products are found, a large number of scrap products have been produced, causing serious material waste and cost increase. (3) The traditional wire harness machining method lacks real-time feedback and dynamic adjustment capability, and cannot realize fine management and control of the machining process, making it difficult to meet the increasingly stringent high-precision and high-reliability production requirements. SUMMARY

[0004] In view of this, in order to solve the problems raised in the background art, a closed-loop management and control method and system for precision machining of automobile high-speed high-frequency wire harness process are provided.

[0005] The purpose of the application can be achieved by the following technical solutions: The first aspect of the application provides a closed-loop management and control method for precision machining of automobile high-speed high-frequency wire harness process, comprising: S1, taking a to-be-machined automobile high-speed high-frequency coaxial cable as a target coaxial cable, obtaining its original data and performing precision cutting and stripping operation, generating a pretreatment wire harness data set of the target coaxial cable, and performing quality judgment. If qualified, execute S2.

[0006] S2, based on the pretreatment wire harness data set, perform center terminal crimping operation, and generate center terminal crimping state data set of the target coaxial cable.

[0007] S3, based on the center conductor offset angle, perform outer conductor installation and crimping operation, and generate outer conductor crimping data set of the target coaxial cable.

[0008] S4, the outer conductor crimping dataset is processed through deviation comparison to generate an error measurement dataset of the target coaxial cable, and the error measurement dataset is stored in a quality database.

[0009] S5, based on the error measurement dataset, a closed-loop signal generation operation is performed to generate a closed-loop calibration signal of the target coaxial cable, and the closed-loop calibration signal is applied to adjust process parameters of the precision stripping operation and the center terminal crimping operation, and closed-loop control is completed.

[0010] The second aspect of the application provides a closed-loop control system for multi-process precision machining of automobile high-speed high-frequency wire harness, comprising: a wire harness preprocessing module, a center terminal crimping module, an outer conductor installation and crimping module, an error detection module and a closed-loop control module.

[0011] The wire harness preprocessing module is connected with the center terminal crimping module, the center terminal crimping module is connected with the outer conductor installation and crimping module, the outer conductor installation and crimping module is connected with the error detection module, and the error detection module is connected with the closed-loop control module.

[0012] The wire harness preprocessing module, the automobile high-speed high-frequency coaxial cable to be machined is denoted as a target coaxial cable, the original data thereof is obtained and a precision stripping operation is performed, a preprocessing wire harness dataset of the target coaxial cable is generated, and quality judgment is performed thereon, and if qualified, the center terminal crimping module is executed.

[0013] The center terminal crimping module, based on the preprocessing wire harness dataset, performs a center terminal crimping operation to generate a center terminal crimping state dataset of the target coaxial cable.

[0014] The outer conductor installation and crimping module, based on the center conductor offset angle, performs an outer conductor installation and crimping operation to generate an outer conductor crimping dataset of the target coaxial cable.

[0015] The error detection module, the outer conductor crimping dataset is processed through deviation comparison to generate an error measurement dataset of the target coaxial cable, and the error measurement dataset is stored in a quality database.

[0016] The closed-loop control module, based on the error measurement dataset, performs a closed-loop signal generation operation to generate a closed-loop calibration signal of the target coaxial cable, and the closed-loop calibration signal is applied to adjust process parameters of the precision stripping operation and the center terminal crimping operation, and closed-loop control is completed.

[0017] Compared with the prior art, the application has the following advantages: 1, the application constructs a complete closed-loop system from machining to detection and feedback adjustment, realizes intelligent control of the multi-process machining process of the automobile high-speed high-frequency wire harness, and improves the consistency of machining precision and product quality.

[0018] 2、The present application obtains the original physical characteristics such as the bending degree of the cable at the initial stage of processing, and uses it as the input parameter of the subsequent process, and compensates in advance, and collects the state data in the processing process in real time, and analyzes the error of the final product, and converts the error signal into specific calibration instruction, dynamically adjusts the stripping and crimping parameters of the front end, effectively compensates the process deviation caused by the material difference or the change of the equipment state, and ensures that each product meets the strict precision standard. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed for the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0020] Figure 1 The method embodiment flowchart of the present application.

[0021] Figure 2 The system module connection diagram of the present application.

[0022] Figure 3 The automobile high-speed high-frequency wire harness multi-process precision machining flowchart of the present application. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0024] Embodiment one Please refer to Figure 1 The present application provides a closed-loop control method for automobile high-speed high-frequency wire harness process precision machining, and the specific steps are as follows: S1, the automobile high-speed high-frequency coaxial cable to be processed is marked as target coaxial cable, the original data is obtained and the precision stripping operation is performed, the pretreatment wire harness data set of the target coaxial cable is generated, and the quality is judged, if qualified, S2 is executed.

[0025] It should be further pointed out that the automobile high-speed high-frequency wire harness multi-process precision machining flowchart is shown in Figure 3 .

[0026] It should be noted that the high-speed high-frequency coaxial cable is a coaxial cable for high-speed signal transmission, and its characteristic attributes are physical structures, including a center conductor, an insulating layer, a shielding layer, and an outer sheath. The length range is 1 to 6 meters, which is set according to the requirements of industrial applications, and is optimized by analyzing a plurality of sets of communication equipment sample data.

[0027] In a preferred feasibility example of the present application, the specific process of generating the pre-processing harness data set of the target coaxial cable includes: sequentially stripping the sheath, aluminum foil, insulating layer, and shielding layer of the target coaxial cable using a cutting device to ensure that the sheath cut gap meets the preset accuracy requirement and the shielding layer edge is smooth.

[0028] It should be noted that the cutting device can be a rotating blade, which is an external stripping device, and its function is to accurately remove each layer of the cable, and its setting basis is the manufacturer's equipment manual. When performing the sequential stripping operation, the cut accuracy is required to be less than 0.1 mm, and the setting basis is obtained from experimental test data.

[0029] The bending arc of the target coaxial cable is detected by a deformation sensor, and the alignment state of the shielding layer of the target coaxial cable is scanned by a visual detection device, so as to obtain the bending arc and the alignment state parameter of the shielding layer of the target coaxial cable, which are collectively referred to as the pre-processing harness data set of the target coaxial cable.

[0030] It should be noted that the bending arc is the waveform data of the bending degree of the cable, reflecting the bending arc deviation of the cable; the alignment state parameter of the shielding layer is the alignment deviation degree of the shielding layer and the center conductor, reflecting the relative position accuracy of the shielding layer and the inner conductor of the cable, such as alignment deviation angle and edge smoothness.

[0031] Exemplarily, when a high-speed high-frequency coaxial cable with a length of 3 meters is obtained, after stripping the sheath, aluminum foil, insulating layer, and shielding layer by the cutting device, the rotating blade controls the cut accuracy, the sheath cut gap is actually measured to be 0.08 mm, the shielding layer edge is smooth without silk, and the insulating layer is intact without damage. The deformation sensor measures the bending arc signal value to be 0.2 radian, and the visual detection device detects the alignment state of the shielding layer to be 0.03 mm deviation, which is recorded as the pre-processing harness data set of the high-speed high-frequency coaxial cable. The data directly verifies that the cut accuracy is less than 0.1 mm and the effectiveness of the alignment state of the shielding layer.

[0032] In a preferred feasible example of the present application, the specific process of quality determination of the pre-processed harness data set of the target coaxial cable includes: determining whether the bending curvature and the shielding layer alignment state parameters of the target coaxial cable are qualified based on the quality determination standard respectively, if both the bending curvature and the shielding layer alignment state parameters of the target coaxial cable are qualified, the quality determination of the pre-processed harness data set of the target coaxial cable is recorded as qualified, otherwise, the quality determination of the pre-processed harness data set of the target coaxial cable is unqualified, and the processing flow of the current harness is terminated before performing the center terminal crimping operation.

[0033] It should be noted that the specific process of determining whether the bending curvature and the shielding layer alignment state parameters of the target coaxial cable are qualified based on the quality determination standard respectively includes: comparing the bending curvature of the target coaxial cable with the permitted range in the quality determination standard, if the bending curvature is within the permitted range, it means that the bending curvature is qualified, otherwise, it means that the bending curvature is unqualified; comparing the shielding layer alignment state parameter of the target coaxial cable with the corresponding standard in the quality determination standard, if the shielding layer alignment state parameter meets the edge smoothness without burrs and the alignment deviation angle with the inner conductor is less than the permitted difference, it means that the shielding layer alignment state parameter is qualified, otherwise, it means that the shielding layer alignment state parameter is unqualified.

[0034] The quality determination standard is an industry precision specification or an enterprise internal standard.

[0035] It should be explained that by introducing the combination of early quality screening and processing flow control, subsequent processing of unqualified semi-finished products is avoided, thereby improving the overall production efficiency and qualification rate.

[0036] S2, based on the pre-processed harness data set, performing a center terminal crimping operation to generate a center terminal crimping state data set of the target coaxial cable.

[0037] In a preferred feasible example of the present application, the specific process of generating the center terminal crimping state data set of the target coaxial cable includes: extracting the bending curvature of the target coaxial cable from the pre-processed harness data set, and dynamically setting the crimping pressure according to a pre-defined logical rule to compensate for the crimping unevenness caused by bending.

[0038] It should be noted that the specific content of the pre-defined logical rule is that the pressure increases accordingly as the bending value increases.

[0039] Illustratively, the dynamic setting of the crimping pressure specifically includes: setting a pressure adjustment ratio in combination with the actual situation of the cable and production experience, when the bending curvature is 0.3 radian, the corresponding crimping pressure is dynamically set to 600 Newton; when the bending curvature is 0.5 radian, the corresponding crimping pressure is dynamically set to 1000 Newton.

[0040] The center terminal is crimped by a crimping machine based on the crimping pressure to ensure that the core wire is not exposed, and the center conductor offset angle of the target coaxial cable after crimping is detected, which is recorded as the center terminal crimping state data set of the target coaxial cable.

[0041] It should be noted that the target crimping height and width are set based on industrial precision specifications, and the crimping machine is used to crimp the center terminal. The target crimping height is the vertical size of the terminal after crimping, and the target crimping width is the horizontal size of the terminal after crimping. The target value is set based on the specification, and the crimping error is controlled within 0.2 mm. During the crimping process, it is ensured that the core wire is not exposed or protrudes outside the terminal.

[0042] The center conductor offset angle of the target coaxial cable after crimping is detected by an angle measuring instrument to obtain the deviation angle between the crimping position and the ideal position of the center conductor after crimping.

[0043] For example, when the bending radius in the pre-processing harness data set is 0.2 rad, the crimping pressure is dynamically set to 500 N based on this value. The center terminal is crimped using a crimping machine, and the target crimping height is set to 5 mm and the width is set to 3 mm. The actual crimping height is 5.05 mm and the width is 2.99 mm, with an error controlled within 0.2 mm, and the core wire is not exposed. The center conductor offset angle is detected to be 0.3 degrees, which is recorded as the center terminal crimping state data set. The data directly verifies the effectiveness of the error control within 0.2 mm and the offset angle measurement.

[0044] S3, based on the center conductor offset angle, performing outer conductor installation and crimping operation, generating outer conductor crimping data set of target coaxial cable.

[0045] In a preferred example of the present application, the specific process of generating the outer conductor crimping data set of the target coaxial cable includes: reading the center conductor offset angle of the target coaxial cable in the center terminal crimping state data set, using it as the outer conductor installation position compensation amount to adjust with a servo motor drive, and realizing fine adjustment to compensate for the offset angle. The servo motor drive adjustment mechanism realizes fine adjustment to compensate for the offset angle, ensuring accurate interface size. The interface size is defined as the deviation between the target size and the actual size of the outer conductor and the center terminal interface, which is controlled within 0.1 mm.

[0046] The outer conductor is installed and crimped using a crimping tool, and the sleeve and sheath gap value, the diameter and length of the conductor, and the center line alignment parameter of the target coaxial cable after crimping are detected in real time, which are collectively referred to as the outer conductor crimping data set of the target coaxial cable.

[0047] It should be noted that the sleeve and sheath gap value is the minimum distance between the outer wall of the sleeve and the inner wall of the sheath, and the center line alignment parameter is the deviation angle of the outer conductor center line and the center conductor center line.

[0048] It should be further noted that the specific acquisition method of the sleeve and sheath gap value, the diameter and length of the conductor and the center line alignment parameter of the target coaxial cable after crimping is as follows: the sleeve and sheath gap after crimping is detected by a range finder, the size of the outer conductor including the diameter and the length is measured by a caliper, and the center line alignment parameter is detected by a laser alignment instrument.

[0049] Illustratively, when the input center terminal crimping state data set contains an offset angle of 0.3 degrees, the outer conductor installation position is adjusted by 0.3 degrees according to the value to compensate for the deviation, and the interface size deviation after installation is measured to be 0.05 mm. The outer conductor is crimped using a crimping tool, the sleeve and sheath gap is measured to be 0.8 mm, the size of the outer conductor is measured to be 4.5 mm in diameter and 15 mm in length, and the center line alignment parameter deviation is 0.2 degrees, which is recorded as the outer conductor crimping data set. Among them, the data directly verifies that the gap is not more than 1 mm and the effectiveness of the center line alignment parameter.

[0050] S4, the outer conductor crimping data set is processed by deviation comparison to generate an error measurement data set of the target coaxial cable, and is stored in a quality database.

[0051] In a preferred feasibility example of the present application, the specific process of generating the error measurement data set of the target coaxial cable includes: extracting the sleeve and sheath gap value, the diameter and length of the conductor and the center line alignment parameter of the target coaxial cable after crimping from the outer conductor crimping data set, and respectively comparing them with the corresponding preset standard values to obtain the deviation values of the sleeve and sheath gap value, the diameter and length of the conductor and the center line alignment parameter of the target coaxial cable after crimping and the corresponding preset standard values.

[0052] The error values are compared with the corresponding preset industrial precision specifications respectively to determine the error representative values of the sleeve and sheath gap value, the diameter and length of the conductor and the center line alignment parameter of the target coaxial cable after crimping.

[0053] It should be noted that when the deviation value of the sleeve and sheath gap value of the target coaxial cable after crimping is not within the corresponding preset industrial precision specification, the error representative value of the sleeve and sheath gap value of the target coaxial cable after crimping is recorded as 1, otherwise, the error representative value of the sleeve and sheath gap value of the target coaxial cable after crimping is recorded as 0, and the error representative values of the diameter and length of the conductor and the center line alignment parameter of the target coaxial cable after crimping can be obtained in the same way.

[0054] The error representative value is 0, indicating that there is an error, and the error representative value is 1, indicating that there is no error.

[0055] The deviation value and the error representative value are collectively referred to as the error measurement data set of the target coaxial cable.

[0056] It should be further pointed out that after generating the error measurement data set, the following steps are further included: generating a unique identity for the target coaxial cable currently processed, associating its error measurement data set with the unique identity, storing it in the quality database, and establishing a real-time error data and product identity traceability association.

[0057] Exemplarily, when the input outer conductor crimping data set contains an outer conductor size diameter of 4.5 mm, a length of 15 mm, and a center line alignment parameter of 0.2 degrees, a high-precision camera device is called to scan the crimping result, and the industrial precision specification target diameter is 5 mm, the target center line offset is 0 degrees, and there is no shielding layer defect requirement. The size deviation error is calculated as 0.5 mm, the center line offset is measured as 0.2 degrees, and the shielding layer defect state is detected as 0 without defects, which is recorded as the error measurement data set. Among them, the data directly verifies the effectiveness of the size deviation error calculation and the shielding layer defect state setting.

[0058] The present application obtains the bending degree and other original physical characteristics of the cable at the initial stage of processing, and uses them as input parameters for subsequent processes, and performs compensatory adjustment in advance. Real-time acquisition of various state data during processing, error analysis of the final product, conversion of error signals into specific calibration instructions, dynamic adjustment of front-end stripping and crimping parameters, effective compensation of process deviations caused by material differences or equipment state changes, and ensuring that each product meets the strict precision standards.

[0059] S5, based on the error measurement data set, performing a closed-loop signal generation operation to generate a closed-loop calibration signal for the target coaxial cable, and applying it to adjust the process parameters of the precision stripping operation and the center terminal crimping operation to complete closed-loop control.

[0060] In a preferred feasibility example of the present application, the specific process of generating a closed-loop calibration signal for the target coaxial cable includes: generating a correction instruction based on the error measurement data set according to the correction instruction generation logic, and converting it into a mechanical adjustment signal.

[0061] The mechanical adjustment signal is recorded as the closed-loop calibration signal of the target coaxial cable.

[0062] It should be noted that the closed-loop signal generation operation is a functional process, indicating the behavior of generating a feedback control signal. The correction instruction is a data instruction, the characteristic attribute is a control parameter, the setting basis is an error analysis algorithm rule, the mechanical adjustment signal is a physical signal, the characteristic attribute is an electrical pulse waveform, and the setting basis is an actuator interface standard. The closed-loop calibration signal is a data structure, the characteristic attribute is a control instruction set, and the setting basis is an industrial communication protocol MODBUS-RTU.

[0063] Exemplarily, when the input error measurement data set contains a dimensional error of 0.5 mm, the analysis generates a correction instruction: adjustment amplitude mm, the direction is to reduce the cutting depth. The mechanical adjustment signal is converted to a 200 ms pulse width pulse. The output closed-loop calibration signal data packet contains a crimping pressure correction amount of -30 Newton and a cutting position offset of -0.4 mm. Among them, the data directly verifies the effectiveness of the correction instruction formula and signal conversion.

[0064] In a preferred feasibility example of the present application, the calibration instruction specifically includes correction direction and correction amplitude information, wherein the correction direction includes direction correction of the cutting position and direction correction of the crimping pressure and crimping speed adjustment, and the correction amplitude information includes the cutting depth value and the crimping pressure value and the crimping speed value.

[0065] The specific content of the correction instruction generation logic includes: when the error representative value of the target coaxial cable after crimping sleeve and sheath gap value, conductor diameter and length, and center line alignment parameter is 1, it means that it needs to be corrected, and further match the deviation value of the target coaxial cable after crimping sleeve and sheath gap value, conductor diameter and length, and center line alignment parameter with the corresponding preset standard value, determine the correction direction and the correction amplitude information.

[0066] It should be noted that the preset corresponding relationship refers to the preset matching rule between the deviation value of each parameter of the outer conductor after crimping, i.e. the sleeve and sheath gap value, the conductor diameter and length, the center line alignment parameter, and the preset standard value, and the correction direction and the correction amplitude information. Specifically as follows: (1) the preset corresponding relationship of the sleeve and sheath gap value deviation: if the gap value is greater than the preset standard value, i.e. the deviation value is positive, the correction direction is to reduce the cutting depth, and the correction amplitude information is determined according to the size of the deviation value, for example, the cutting depth is reduced by 0.08 mm for every 0.1 mm of the gap value.

[0067] (2) The preset corresponding relationship corresponding to the conductor diameter deviation: if the diameter is greater than the preset standard value, i.e. the deviation value is positive, the correction direction is to reduce the crimping pressure, and the correction amplitude is that the diameter is 0.1 millimeter larger, and the crimping pressure is correspondingly reduced by a certain value such as 20 newtons; if the diameter is less than the preset standard value, i.e. the deviation value is negative, then the correction direction is to increase the crimping pressure, and the amplitude is the same.

[0068] (3) The preset corresponding relationship corresponding to the conductor length deviation: if the length is greater than the preset standard value, i.e. the deviation value is positive, the correction direction is to speed up the cutting speed to reduce the cutting length, and the correction amplitude is that the length is 0.5 millimeter longer, and the cutting speed is correspondingly increased by a certain percentage such as 5%; if the length is less than the preset standard value, i.e. the deviation value is negative, then the correction direction is to slow down the cutting speed, and the amplitude is the same.

[0069] (3) The preset corresponding relationship corresponding to the center line alignment parameter deviation: if there is an offset angle in the center line alignment, i.e. the deviation value is positive, the correction direction is to adjust the crimping position to compensate for the offset, and the correction amplitude is that the offset angle is increased by 0.1 degree, and the crimping position is correspondingly adjusted by a certain distance such as 0.05 millimeters.

[0070] Exemplarily, when it is detected that the target coaxial cable crimped sleeve and sheath gap value is 0.2 millimeters greater than the preset standard value, i.e. the deviation value is 0.2 millimeters, according to the preset corresponding relationship, it is determined that the correction direction is to reduce the cutting depth, and the correction amplitude is 0.16 millimeters, i.e. 0.2 millimeters x 0.8, i.e. by reducing the cutting depth by 0.16 millimeters to make the cable sleeve and sheath gap value of subsequent processing meet the standard.

[0071] In a preferred feasible example of the present application, the specific process of completing closed-loop control includes: reading the closed-loop calibration signal, and reversely adjusting the cutting depth and position in the precise cutting and stripping operation based on the cutting position offset parameter contained in the closed-loop calibration signal.

[0072] Based on the crimping pressure correction amount parameter contained in the closed-loop calibration signal, the crimping pressure and the crimping speed in the center terminal crimping operation and the outer conductor crimping operation are synchronously adjusted.

[0073] By simultaneously adjusting the parameters of the cutting and crimping two different processes, the processing precision is cooperatively optimized, and faster error convergence than single parameter adjustment is realized.

[0074] Specifically, first read the closed-loop calibration signal, which contains the cutting position offset parameter and the crimping pressure correction parameter. Based on the cutting position offset value, the cutting depth and position in step S1 are adjusted in reverse, the cutting depth represents the depth parameter of the mechanical cutting tool cutting into the cable sheath, and the position represents the three-dimensional spatial coordinates of the cutting point; the adjustment logic directly modifies the cutting equipment control parameters according to the offset value, for example, when the offset value is negative, the cutting depth is reduced and the position coordinates are moved correspondingly. At the same time, based on the crimping pressure correction, the crimping pressure setting in step S2 is adjusted, the crimping pressure represents the force value applied to the terminal; and the crimping speed setting is adjusted, the crimping speed represents the movement speed of the crimping operation. Similarly, the crimping pressure and speed settings in step S3 are adjusted. Then, the complete sequence of steps from step S1 to obtain the original data of the coaxial cable to step S5 to generate the closed-loop calibration signal is re-executed. In the re-execution process, the error measurement data set generated by step S4 is used to detect the updated error value in real time. The sequence is executed in a continuous loop, and when the dimensional error value in the error measurement data set is less than the preset threshold value, the loop is stopped to eliminate the error, and the closed-loop control process is completed.

[0075] For example, when the input closed-loop calibration signal contains a cutting position offset of -0.4 mm and a crimping pressure correction of -30 N, the cutting depth in step S1 is adjusted to decrease by 0.4 mm, and the position coordinates are offset by -0.4 mm; the crimping pressure in step S2 is adjusted to decrease by 30 N, and the crimping speed is set to 2 mm / s; and the crimping pressure and speed settings in step S3 are adjusted. After re-executing the S1 to S5 sequence, the new error measurement data set has a dimensional error value of 0.05 mm, which is less than the preset threshold value of 0.1 mm, and the loop is stopped to complete the closed-loop control. The data directly verifies the effectiveness of the cutting depth adjustment, the crimping speed setting, and the closed-loop loop termination condition.

[0076] The present application realizes intelligent control of the multi-process machining of automobile high-speed high-frequency wire harness by constructing a complete closed-loop system from machining to detection and then to feedback adjustment, and improves the consistency of machining precision and product quality.

[0077] Embodiment Two Please refer to Figure 2 The present application provides a closed-loop control system for multi-process precision machining of automobile high-speed high-frequency wire harness, and the specific module distribution is as follows: a wire harness preprocessing module, a center terminal crimping module, an outer conductor installation and crimping module, an error detection module, and a closed-loop control module.

[0078] The wire harness preprocessing module is connected to the center terminal crimping module, the center terminal crimping module is connected to the outer conductor installation and crimping module, the outer conductor installation and crimping module is connected to the error detection module, and the error detection module is connected to the closed-loop control module.

[0079] The wire harness preprocessing module takes the automotive high-speed high-frequency coaxial cable to be processed as a target coaxial cable, acquires original data thereof and performs a precise stripping operation, generates a preprocessing wire harness data set of the target coaxial cable, and performs quality determination thereon, and if qualified, performs the center terminal crimping module.

[0080] The center terminal crimping module performs a center terminal crimping operation based on the preprocessing wire harness data set, and generates a center terminal crimping state data set of the target coaxial cable.

[0081] The outer conductor installation and crimping module performs an outer conductor installation and crimping operation based on the center conductor offset angle, and generates an outer conductor crimping data set of the target coaxial cable.

[0082] The error detection module performs deviation comparison processing on the outer conductor crimping data set, generates an error measurement data set of the target coaxial cable, and stores the error measurement data set in a quality database.

[0083] The closed-loop control module performs a closed-loop signal generation operation based on the error measurement data set, generates a closed-loop calibration signal of the target coaxial cable, and applies the closed-loop calibration signal to adjust process parameters of the precise stripping operation and the center terminal crimping operation, and completes closed-loop control.

[0084] Embodiment three In the third embodiment of the present application, in combination with the above-mentioned closed-loop control method for precise machining of an automotive high-speed high-frequency wire harness process, the present embodiment provides the following technical solution: a storage medium, the storage medium has a computer program stored thereon, the computer program is executed by a processor to realize the above-mentioned closed-loop control method for precise machining of an automotive high-speed high-frequency wire harness process.

[0085] Those skilled in the art can understand that the logic and steps described in the flowchart or otherwise herein, for example, can be considered as a sequence of data tables of executable instructions for implementing logical functions, which can be embodied in any computer readable medium for use by or in conjunction with an instruction execution system, device or apparatus, such as a computer-based system, a system including a processor or other system that can fetch and execute instructions from an instruction execution system, device or apparatus. For the purposes of this specification, a "computer readable medium" can be any device that can contain, store, communicate, propagate or transport programs for use by or in conjunction with an instruction execution system, device or apparatus, or in conjunction with these instruction execution systems, devices or apparatus.

[0086] More specific examples (a non-exhaustive list) of the computer-readable medium include the following: an electrical connection having one or more wires (electrical devices), a portable computer diskette (magnetic devices), a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or Flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer readable medium can be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, for instance via an optical scanner, or other suitable device and stored in computer memory.

[0087] It should be understood that aspects of the application can be implemented in hardware, software, firmware or combinations thereof. In the embodiments described above, various steps or methods can be implemented, for example, by software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, and in another embodiment, any of the following technologies, or combinations thereof, can be used: a discrete logic circuit having logic gates for implementing logic functions upon data signals, an application specific integrated circuit having appropriate combinational logic gates, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0088] The foregoing is merely illustrative of the principles of the application and various modifications can be made by persons skilled in the art without departing from the scope of the application as defined by the appended claims.

Claims

1. A closed-loop management method for precise processing of high-speed high-frequency wire harness procedures for automobiles, characterized by: The application relates to a method for processing a target coaxial cable of an automobile high-speed high-frequency coaxial cable. S1, a target coaxial cable to be processed is recorded as a target coaxial cable, original data of the target coaxial cable is acquired, and precise stripping operation is performed to generate a pretreatment harness data set of the target coaxial cable, and quality judgment is performed on the pretreatment harness data set, if the quality judgment is qualified, S2 is executed; S2, based on the pretreatment harness data set, center terminal crimping operation is performed to generate a center terminal crimping state data set of the target coaxial cable; S3, based on the center conductor offset angle, outer conductor installation and crimping operation are performed to generate an outer conductor crimping data set of the target coaxial cable; S4, the outer conductor crimping data set is processed through deviation comparison to generate an error measurement data set of the target coaxial cable, and the error measurement data set is stored in a quality database; S5, based on the error measurement data set, closed-loop signal generation operation is performed to generate a closed-loop calibration signal of the target coaxial cable, and the closed-loop calibration signal is applied to adjust process parameters of the precise stripping operation and the center terminal crimping operation, and closed-loop control is completed.

2. The closed-loop management method for precise machining of an automobile high-speed high-frequency wire harness process according to claim 1, characterized in that: The specific process of generating the pretreatment harness data set of the target coaxial cable comprises the following steps: The sheath, aluminum foil, insulating layer and shielding layer of the target coaxial cable are sequentially stripped by using a cutting device; The bending curvature of the target coaxial cable is detected by a deformation sensor, and the shielding layer alignment state of the target coaxial cable is scanned by using a visual detection device, so that the bending curvature and the shielding layer alignment state parameters of the target coaxial cable are obtained, which are collectively referred to as the pretreatment harness data set of the target coaxial cable.

3. The closed-loop management method for precise machining of a high-speed high-frequency wire harness process of an automobile according to claim 2, characterized in that: The specific process of performing quality judgment on the pretreatment harness data set of the target coaxial cable comprises the following steps: Based on the quality judgment standard, whether the bending curvature and the shielding layer alignment state parameters of the target coaxial cable are qualified is determined respectively, if the bending curvature and the shielding layer alignment state parameters of the target coaxial cable are both qualified, the quality judgment of the pretreatment harness data set of the target coaxial cable is qualified, otherwise, the quality judgment of the pretreatment harness data set of the target coaxial cable is unqualified, and the processing flow of the current harness is terminated before the center terminal crimping operation is performed.

4. The closed-loop management method for precise machining of a high-speed high-frequency wire harness process for an automobile according to claim 1, characterized in that: The specific process of generating the center terminal crimping state data set of the target coaxial cable comprises the following steps: The bending curvature of the target coaxial cable is extracted from the pretreatment harness data set, and the crimping pressure is dynamically set according to the predefined logical rule; The center terminal is crimped by a crimping machine based on the crimping pressure, and the center conductor offset angle of the target coaxial cable after crimping is detected, which is recorded as the center terminal crimping state data set of the target coaxial cable.

5. The closed-loop management method for precise machining of a high-speed high-frequency wire harness process for an automobile according to claim 1, characterized in that: The specific process of generating the outer conductor crimping data set of the target coaxial cable comprises the following steps: The center conductor offset angle of the target coaxial cable in the center terminal crimping state data set is read, and is used as an outer conductor installation position compensation amount to be adjusted by using a servo motor to realize fine adjustment and compensation of the offset angle; The outer conductor is installed and crimped by using a crimping tool, and the sleeve and sheath gap value, the diameter and length of the conductor and the center line alignment parameter of the target coaxial cable after crimping are detected in real time, which are collectively referred to as the outer conductor crimping data set of the target coaxial cable.

6. The closed-loop management method for precise processing of an automobile high-speed high-frequency wire harness process according to claim 1, characterized in that: The specific process of generating the error measurement data set of the target coaxial cable comprises the following steps: extracting the target coaxial cable from the outer conductor crimping data set after the sleeve and sheath gap value, the diameter and length of the conductor and the center line alignment parameter, and comparing them with the corresponding preset standard values respectively, to obtain the deviation value of the target coaxial cable from the sleeve and sheath gap value, the diameter and length of the conductor and the center line alignment parameter after crimping and the corresponding preset standard value; comparing the error value with the corresponding preset industrial precision specification respectively to determine the error representative value of the sleeve and sheath gap value, the diameter and length of the conductor and the center line alignment parameter of the target coaxial cable after crimping; the deviation value and the error representative value are collectively referred to as error measurement data set of the target coaxial cable.

7. The closed-loop management method for precise processing of an automobile high-speed high-frequency wire harness process according to claim 1, characterized in that: The specific process of generating the closed-loop calibration signal of the target coaxial cable includes: Based on the error measurement data set, the correction instruction is obtained according to the correction instruction generation logic, and is converted into a mechanical adjustment signal.

8. The mechanical adjustment signal is recorded as the closed-loop calibration signal of the target coaxial cable.

9. The closed-loop management method for precise machining of a high-speed high-frequency wire harness process for an automobile according to claim 7, characterized in that: The calibration instruction is specifically the correction direction and the correction amplitude information, wherein the correction direction includes the direction correction of the cutting position and the direction correction of the crimping pressure and crimping speed adjustment, and the correction amplitude information includes the cutting depth value and the crimping pressure value and crimping speed value; The specific content of the correction instruction generation logic includes: when the error representative value of the target coaxial cable from the sleeve and sheath gap value, the diameter and length of the conductor and the center line alignment parameter after crimping is 1, it means that it needs to be corrected, and further matching the deviation value of the target coaxial cable from the sleeve and sheath gap value, the diameter and length of the conductor and the center line alignment parameter after crimping with the corresponding preset standard value respectively with the preset corresponding relationship, to determine the correction direction and the correction amplitude information.

10. The closed-loop management method for precise machining of an automobile high-speed high-frequency wire harness process according to claim 8, characterized in that: The specific process of completing closed-loop control by applying the closed-loop calibration signal to adjust the process parameters of the precise stripping operation and the center terminal crimping operation includes: read the closed-loop calibration signal; Based on the cutting position offset parameter contained in the closed-loop calibration signal, the cutting depth and position in the precise stripping operation are adjusted in reverse; Based on the crimping pressure correction amount parameter contained in the closed-loop calibration signal, the crimping pressure and crimping speed in the center terminal crimping operation and the outer conductor crimping operation are adjusted synchronously.

11. A system for performing the closed-loop management method of claim 1-9 for the precision machining of a high-speed high-frequency wire harness process for a vehicle, characterized in that it comprises: including The wire harness preprocessing module records the automobile high-speed high-frequency coaxial cable to be processed as the target coaxial cable, obtains its original data and performs precise stripping operation, generates the preprocessing wire harness data set of the target coaxial cable, and performs quality judgment, and if qualified, executes the center terminal crimping module; The center terminal crimping module executes the center terminal crimping operation based on the preprocessing wire harness data set to generate the center terminal crimping state data set of the target coaxial cable; The outer conductor installation and crimping module executes the outer conductor installation and crimping operation based on the center conductor offset angle to generate the outer conductor crimping data set of the target coaxial cable; The error detection module processes the outer conductor crimping data set through deviation comparison to generate the error measurement data set of the target coaxial cable, and stores it in the quality database; The closed-loop control module performs a closed-loop signal generation operation based on the error measurement dataset, generates a closed-loop calibration signal of the target coaxial cable, and applies the closed-loop calibration signal to adjust process parameters of the precision stripping operation and the center terminal crimping operation, to complete closed-loop control.

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