Pipeline layout optimization method and device based on flexible pipeline size chain calculation

Abstract

The application provides a pipeline arrangement optimization method and device based on flexible pipeline size chain calculation, and the method comprises the following steps: a size chain ring composed of a flexible pipeline is split into a plurality of basic size units in minimum calculation units; a first limit deviation value of each basic size unit is calculated according to a corresponding deviation value calculation formula of each basic size unit, and a target size unit needing improvement is determined according to the calculation result; a tolerance reduction scheme is obtained, the first limit deviation value of each target size unit is reduced according to the tolerance reduction scheme, then the tolerance bandwidth of the flexible pipeline is reduced, and the reserved length of the flexible pipeline after the tolerance is reduced is calculated; wherein, the tolerance reduction scheme is formulated by analyzing each target size unit section by section. Compared with the prior art, the pipeline arrangement scheme is optimized, and the accuracy of pipeline arrangement is improved by checking and calculating the digital model size chain of the vehicle flexible pipeline.

Description

Technical Field

[0001] This invention relates to the field of pipeline layout technology in vehicle manufacturing, and in particular to a pipeline layout optimization method and apparatus based on flexible pipeline dimension chain calculation. Background Technology

[0002] With the development of vehicle technology, the electrical systems of vehicles are becoming increasingly diversified. The increased functions of engineering vehicles mean an increase in pipelines, which in turn become more numerous and complex. In order to ensure the normal operation of engineering vehicles, it is essential to ensure the proper routing and fixing of pipelines.

[0003] With the commercial vehicle market facing increasingly challenging conditions, the development timeline for new vehicles is becoming shorter and shorter. Meanwhile, the growing demand for optional features (such as retarders, fuel heating, and 360-degree reversing cameras) is adding a significant number of wiring harnesses, while the chassis width remains unchanged. This results in a more compact vehicle layout, requiring more precise wiring arrangement solutions. Existing wiring arrangement solutions rely solely on simple placement in the chassis digital model, with corner placements based on fixed dimensions without considering the actual size of the components. Wiring lengths are also pre-set to fixed lengths, leading to numerous wiring problems during actual vehicle assembly, such as insufficient length and gaps. Furthermore, wiring is only installed after other hardware components, making its placement heavily constrained by these systems, and there is no way to accurately verify the reasonableness of pre-set lengths and gaps. Summary of the Invention

[0004] To address the aforementioned issues, this invention provides a pipeline layout optimization method and apparatus based on flexible pipeline dimension chain calculation. By verifying and calculating the dimension chain of the vehicle's flexible pipeline digital model, the pipeline layout scheme is optimized, thereby improving the accuracy of the pipeline layout.

[0005] In a first aspect, embodiments of the present invention provide a pipeline layout optimization method based on flexible pipeline dimension chain calculation, comprising:

[0006] The dimensional chain link composed of flexible pipelines is divided into multiple basic dimensional units by the smallest calculation unit, which includes straight sections and turning sections;

[0007] Calculate the first limit deviation value of each basic size unit according to the deviation value calculation formula corresponding to each basic size unit;

[0008] By statistically analyzing the first limit deviation value and the corresponding theoretical length of the digital model for each of the basic size units, the target size unit that needs to be improved is determined.

[0009] A tolerance reduction scheme is obtained, and the first limit deviation value of each of the target size units is reduced according to the tolerance reduction scheme, thereby reducing the tolerance band width of the flexible pipeline; wherein, the tolerance reduction scheme is formulated by analyzing each of the target size units segment by segment;

[0010] Based on the tolerance zone width of the flexible pipeline, the offset median of the pipeline layout is calculated, and the reserved length of the flexible pipeline is determined based on the offset median.

[0011] This invention provides a pipeline layout optimization method based on flexible pipeline dimension chain calculation. The method involves splitting the dimension chain of flexible pipelines into multiple basic dimension units, calculating the limit deviations of each basic dimension unit, analyzing the limit deviations of each basic dimension unit segment by segment to formulate tolerance reduction schemes, reducing the reserved length of flexible pipelines, avoiding wasted interior space, and finally calculating the median offset based on the reduced limit deviations to determine the reserved length of the flexible pipelines, thereby improving the accuracy of pipeline layout.

[0012] Furthermore, the first limit deviation value of each of the basic size units includes:

[0013] The first limit deviation value between the positioning color mark and the positioning bolt; the first limit deviation value between the wiring harness mounting bracket and the engine rear overhang; the first limit deviation value at the bend of the first wiring harness mounting beam; the first limit deviation value between the wiring harness installation and the bracket inside and outside; the first limit deviation value at the bend of the second wiring harness mounting beam; the first limit deviation value at the bend of the wiring harness installation; the first limit deviation value between the wiring harness installation and the cable tie fixing inside and outside.

[0014] In one possible implementation, the first limit deviation value of each of the basic size units is calculated according to the deviation value calculation formula corresponding to each basic size unit, specifically as follows:

[0015] Calculate the first limit deviation value between the positioning color mark and the positioning bolt based on the width of the positioning bolt and the width of the wire harness color mark;

[0016] Based on the distance in the x-axis direction between the current wiring harness mounting bracket and the previous fixing point and the maximum offset of the flexible pipeline at the current fixing point, calculate the first limit deviation value between the wiring harness mounting bracket and the engine rear overhang.

[0017] Calculate the first limit deviation value at the bend of the first wire harness installation beam based on the wire harness turning amount and the distance between two adjacent fixed points in the x and y directions.

[0018] Based on the distance in the x-axis direction between the current wiring harness mounting bracket and the previous fixing point and the maximum offset of the flexible pipeline at the current fixing point, calculate the first limit deviation value between the wiring harness installation and the bracket inside and outside;

[0019] Based on the distances in the x, y, and z axes between the two ends of the wire harness turning point and the minimum turning limit of the wire harness, calculate the first limit deviation value at the bend of the second wire harness installation beam;

[0020] Calculate the first limit deviation value at the bend of the wire harness installation based on the fixed radius of the wire harness, the radius of the thick wire of the wire harness, the radius of the thin wire of the wire harness, and the bend angle of the wire harness.

[0021] Based on the distance in the x-axis direction between the current fixing point and the previous fixing point of the wire harness installation and the maximum offset of the flexible pipeline at the current fixing point, calculate the first limit deviation value between the wire harness installation and the cable tie fixing.

[0022] This invention specifically illustrates the limit deviation values ​​that need to be calculated for each basic dimensional unit and the digital model dimensions that need to be measured to calculate the limit deviation values. By calculating the limit deviation values, the main basic dimensional units that cause the deviation of the flexible pipeline can be analyzed. When formulating tolerance reduction schemes, these main basic dimensional units can be optimized to improve the optimization efficiency and effect of pipeline layout optimization.

[0023] Furthermore, the calculation of the first limit deviation value between the positioning color mark and the positioning bolt is specifically as follows:

[0024]

[0025] Among them, X 1+ X represents the limit deviation value for the actual pipeline being too short between the positioning color mark and the positioning bolt. 1- This indicates the limit deviation value of the actual pipeline length between the positioning color mark and the positioning bolt. K1 is the width of the positioning bolt head, and K2 is the width of the wire harness color mark.

[0026] Furthermore, the calculation of the first limit deviation value between the wiring harness mounting bracket and the engine rear overhang is specifically as follows:

[0027]

[0028] Among them, X 2+ x2 is the limit deviation value of the actual pipeline being too short between the wiring harness mounting bracket and the engine rear overhang, x2 is the distance in the x-axis direction between the current fixing point and the previous fixing point of the wiring harness mounting bracket, and T2 is the maximum offset of the flexible pipeline at the current fixing point.

[0029] Furthermore, the calculation of the first limit deviation value at the bend of the first wire harness installation beam is specifically as follows:

[0030]

[0031]

[0032] Among them, X 3- X is the limit deviation value of the actual pipeline length at the bend of the first wiring harness installation beam. 3+ R3 represents the limit deviation value for the actual pipeline being too short at the bend of the first wiring harness installation beam, where R3 is the wiring harness turning amount, and x3 and y3 are the distances between two adjacent fixed points in the x-axis and y-axis directions, respectively.

[0033] Furthermore, the calculation of the first limit deviation value between the wiring harness installation and the inside and outside of the bracket is specifically as follows:

[0034]

[0035] Among them, X 4+ x4 represents the limit deviation value of the actual arrangement of the pipeline inside and outside the bracket for the wire harness installation, x4 is the distance in the x-axis direction between the current fixing point and the previous fixing point of the wire harness installation bracket, and T4 is the maximum offset of the flexible pipeline at the current fixing point.

[0036] Furthermore, the calculation of the first limit deviation value at the bend of the second wiring harness mounting beam is specifically as follows:

[0037]

[0038]

[0039]

[0040] Among them, X 5- X represents the limit deviation value of the actual pipeline length at the bend of the second wiring harness installation beam. 5+ The limit deviation value of the actual pipeline arrangement at the bend of the second wiring harness installation beam is too short. x5, y5 and z5 are the distances between the two ends of the wiring harness bend in the x, y and z axes, respectively. α5 is the deflection angle of the wiring harness bend in three-dimensional space, and r is the minimum limit value of the wiring harness bend.

[0041] In one possible implementation, the calculation of the first limit deviation value at the bend in the wiring harness installation is specifically as follows:

[0042] X 6- =0

[0043]

[0044] Among them, X 6- X represents the limit deviation value of the actual pipeline length at the bend in the wiring harness installation. 6+R6 is the limit deviation value for the actual arrangement of the pipeline at the bend of the wiring harness installation, where R6 is the fixed radius of the wiring harness, r1 is the radius of the thick wire, r2 is the radius of the thin wire, and α6 is the bend angle of the wiring harness.

[0045] In one possible implementation, the calculation of the first limit deviation value between the wire harness installation and the cable tie fixation is specifically as follows:

[0046]

[0047] Among them, X 7+ The limit deviation value for the actual arrangement of the pipeline inside and outside the wire harness installation and cable tie fixation is the shortest possible value. x7 is the distance in the x-axis direction between the current fixing point and the previous fixing point of the wire harness installation. T7 is the maximum offset of the flexible pipeline at the current fixing point.

[0048] The embodiments of the present invention provide specific calculation formulas for calculating the limit deviation values ​​of each of the basic size units, which fully consider the relative distance between the fixed wire harnesses, the bending angle of the wire harnesses, and the thickness of the wire harnesses themselves, making the calculation of the limit deviation values ​​more reasonable and accurate, providing data reference for pipeline layout optimization, and further improving the accuracy of pipeline layout.

[0049] Furthermore, the first limit deviation value of each of the target size units is reduced according to the tolerance reduction scheme, specifically as follows:

[0050] By changing the closed loop position of the target size unit, adding the positioning color mark of the target size unit, adding the mounting bracket of the target size unit, and adjusting the assembly sequence of the target size unit, the single displacement deviation of the target size unit is split into two or more displacement deviations, or the turning deviation of the target size unit is changed into a displacement deviation, thereby reducing the first limit deviation value of each of the target size units.

[0051] This invention provides various methods for reducing the limit deviation values ​​of basic size units. By changing the position of the closed loop, adding positioning color marks, adding mounting brackets, and adjusting the assembly sequence, the deviation values ​​of basic size units are reduced, thereby reducing the tolerance of flexible pipeline wiring, saving vehicle interior space, and improving the accuracy of pipeline layout.

[0052] Secondly, correspondingly, the present invention also provides a pipeline layout optimization device based on flexible pipeline size chain calculation, including a splitting module, a deviation value calculation module, a statistics module, a tolerance reduction module and a reserved length calculation module;

[0053] The splitting module is used to split the dimensional chain of flexible pipelines into multiple basic dimensional units with the smallest calculation unit, and the smallest calculation unit includes straight sections and turning sections.

[0054] The deviation value calculation module is used to calculate the first limit deviation value of each basic size unit according to the deviation value calculation formula corresponding to each basic size unit;

[0055] The statistical module is used to calculate the first limit deviation value and the corresponding theoretical length of the digital model for each of the basic size units, and to determine the target size unit that needs to be improved.

[0056] The tolerance reduction module is used to obtain a tolerance reduction scheme and reduce the first limit deviation value of each of the target size units according to the tolerance reduction scheme, thereby reducing the tolerance band width of the flexible pipeline. The tolerance reduction scheme is formulated by analyzing each of the target size units segment by segment.

[0057] The reserved length calculation module is used to calculate the offset median of the pipeline layout of the flexible pipeline based on the tolerance zone width of the flexible pipeline, and to determine the reserved length of the flexible pipeline based on the offset median.

[0058] Furthermore, the first limit deviation values ​​of each of the basic size units include: the first limit deviation value between the positioning color mark and the positioning bolt; the first limit deviation value between the wiring harness mounting bracket and the engine rear overhang; the first limit deviation value at the bend of the first wiring harness mounting beam; the first limit deviation value between the wiring harness installation and the inside and outside of the bracket; the first limit deviation value at the bend of the second wiring harness mounting beam; the first limit deviation value at the bend of the wiring harness installation; and the first limit deviation value between the wiring harness installation and the inside and outside of the cable tie fixation.

[0059] Furthermore, the deviation value calculation module includes: a deviation value calculation unit between the positioning color mark and the positioning bolt, a deviation value calculation unit between the mounting bracket and the engine rear suspension, a deviation value calculation unit at the bend of the first wiring harness mounting beam, a deviation value calculation unit between the wiring harness installation and the bracket, a deviation value calculation unit at the bend of the second wiring harness mounting beam, a deviation value calculation unit at the bend of the wiring harness installation, and a deviation value calculation unit between the installation and the cable tie fixing.

[0060] The positioning color mark and positioning bolt deviation calculation unit is used to calculate the first limit deviation value between the positioning color mark and the positioning bolt based on the width of the positioning bolt and the width of the wire harness color mark.

[0061] The mounting bracket and engine rear overhang deviation calculation unit is used to calculate the first limit deviation value between the wiring harness mounting bracket and the engine rear overhang based on the distance in the x-axis direction between the current wiring harness mounting bracket and the previous fixed point and the maximum offset of the flexible pipeline at the current fixed point.

[0062] The first wire harness installation beam bend deviation calculation unit is used to calculate the first limit deviation value at the bend of the first wire harness installation beam based on the wire harness turning amount and the distance between two adjacent fixed points in the x-axis and y-axis directions.

[0063] The wiring harness installation and bracket deviation calculation unit is used to calculate the first limit deviation value between the wiring harness installation and the bracket inside and outside based on the distance in the x-axis direction between the current wiring harness installation bracket and the previous fixed point and the maximum offset of the flexible pipeline at the current fixed point.

[0064] The deviation calculation unit at the bend of the second wire harness installation beam is used to calculate the first limit deviation value at the bend of the second wire harness installation beam based on the distance between the two ends of the wire harness bend in the x, y, and z axes and the minimum limit value of the wire harness bend.

[0065] The wire harness installation bend deviation calculation unit is used to calculate the first limit deviation value at the wire harness installation bend based on the wire harness fixed radius, the wire harness thick wire radius, the wire harness thin wire radius and the wire harness bend angle;

[0066] The installation and cable tie fixing deviation calculation unit is used to calculate the first limit deviation value of the installation and cable tie fixing of the wire harness based on the distance in the x-axis direction between the current fixing point and the previous fixing point of the wire harness installation and the maximum offset of the flexible pipeline at the current fixing point.

[0067] In one possible implementation, the calculation of the first limit deviation value between the positioning color mark and the positioning bolt specifically involves:

[0068]

[0069] Among them, X 1+ X represents the limit deviation value for the actual pipeline being too short between the positioning color mark and the positioning bolt. 1- This indicates the limit deviation value of the actual pipeline length between the positioning color mark and the positioning bolt. K1 is the width of the positioning bolt head, and K2 is the width of the wire harness color mark.

[0070] Furthermore, the calculation of the first limit deviation value between the wiring harness mounting bracket and the engine rear overhang is specifically as follows:

[0071]

[0072] Among them, X 2+ x2 is the limit deviation value of the actual pipeline being too short between the wiring harness mounting bracket and the engine rear overhang, x2 is the distance in the x-axis direction between the current fixing point and the previous fixing point of the wiring harness mounting bracket, and T2 is the maximum offset of the flexible pipeline at the current fixing point.

[0073] In one possible implementation, the calculation of the first limit deviation value at the bend of the first wire harness mounting beam specifically involves:

[0074]

[0075]

[0076] Among them, X 3- X is the limit deviation value of the actual pipeline length at the bend of the first wiring harness installation beam. 3+ R3 represents the limit deviation value for the actual pipeline being too short at the bend of the first wiring harness installation beam, where R3 is the wiring harness turning amount, and x3 and y3 are the distances between two adjacent fixed points in the x-axis and y-axis directions, respectively.

[0077] Furthermore, the calculation of the first limit deviation value between the wiring harness installation and the inside and outside of the bracket is specifically as follows:

[0078]

[0079] Among them, X 4+ x4 represents the limit deviation value of the actual arrangement of the pipeline inside and outside the bracket for the wire harness installation, x4 is the distance in the x-axis direction between the current fixing point and the previous fixing point of the wire harness installation bracket, and T4 is the maximum offset of the flexible pipeline at the current fixing point.

[0080] In one possible implementation, the calculation of the first limit deviation value at the bend of the second wiring harness mounting beam specifically involves:

[0081]

[0082]

[0083]

[0084] Among them, X 5- X represents the limit deviation value of the actual pipeline length at the bend of the second wiring harness installation beam. 5+ The limit deviation value of the actual pipeline arrangement at the bend of the second wiring harness installation beam is too short. x5, y5 and z5 are the distances between the two ends of the wiring harness bend in the x, y and z axes, respectively. α5 is the deflection angle of the wiring harness bend in three-dimensional space, and r is the minimum limit value of the wiring harness bend.

[0085] Furthermore, the calculation of the first limit deviation value at the bend in the wiring harness installation is specifically as follows:

[0086] X 6- =0

[0087]

[0088] Among them, X 6- X represents the limit deviation value of the actual pipeline length at the bend in the wiring harness installation. 6+ R6 is the limit deviation value for the actual arrangement of the pipeline at the bend of the wiring harness installation, where R6 is the fixed radius of the wiring harness, r1 is the radius of the thick wire, r2 is the radius of the thin wire, and α6 is the bend angle of the wiring harness.

[0089] In one possible implementation, the calculation of the first limit deviation value between the wire harness installation and the cable tie fixation is specifically as follows:

[0090]

[0091] Among them, X 7+ The limit deviation value for the actual arrangement of the pipeline inside and outside the wire harness installation and cable tie fixation is the shortest possible value. x7 is the distance in the x-axis direction between the current fixing point and the previous fixing point of the wire harness installation. T7 is the maximum offset of the flexible pipeline at the current fixing point.

[0092] Furthermore, the tolerance reduction module reduces the first limit deviation value of each of the target size units according to the tolerance reduction scheme, specifically as follows:

[0093] By changing the closed loop position of the target size unit, adding the positioning color mark of the target size unit, adding the mounting bracket of the target size unit, and adjusting the assembly sequence of the target size unit, the single displacement deviation of the target size unit is split into two or more displacement deviations, or the turning deviation of the target size unit is changed into a displacement deviation, thereby reducing the first limit deviation value of each of the target size units. Attached Figure Description

[0094] Figure 1 This is a schematic flowchart of an embodiment of a pipeline layout optimization method based on flexible pipeline size chain calculation provided by the present invention.

[0095] Figure 2 This is a schematic diagram of flexible pipeline splitting, representing an embodiment of a pipeline layout optimization method based on flexible pipeline dimension chain calculation provided by the present invention.

[0096] Figure 3 This is a summary table of the limit deviation values ​​of each basic size unit in an embodiment of a pipeline layout optimization method based on flexible pipeline size chain calculation provided by the present invention.

[0097] Figure 4 This document summarizes the limit deviation values ​​of each basic size unit after implementing a tolerance reduction scheme, as part of an embodiment of a pipeline layout optimization method based on flexible pipeline size chain calculation provided by the present invention.

[0098] Figure 5 This is a schematic diagram of an embodiment of a pipeline layout optimization device based on flexible pipeline dimension chain calculation provided by the present invention.

[0099] Figure 6 : A schematic diagram of the deviation value calculation module in one embodiment of a pipeline layout optimization device based on flexible pipeline size chain calculation provided by the present invention. Detailed Implementation

[0100] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0101] It should be noted that the step numbers in this document are only for the convenience of explaining the specific embodiments and are not intended to limit the order in which the steps are performed.

[0102] Example 1:

[0103] like Figure 1 As shown, Embodiment 1 provides a pipeline layout optimization method based on flexible pipeline dimension chain calculation, including steps S1 to S5:

[0104] Step S1: Divide the dimensional chain link composed of flexible pipelines into multiple basic dimensional units with the smallest calculation unit, wherein the smallest calculation unit includes straight sections and turning sections;

[0105] Step S2: Calculate the first limit deviation value of each basic size unit according to the deviation value calculation formula corresponding to each basic size unit;

[0106] Step S3: Calculate the first limit deviation value and the corresponding theoretical length of the digital model for each basic size unit, and determine the target size unit that needs to be improved;

[0107] Step S4: Obtain a tolerance reduction plan and reduce the first limit deviation value of each of the target size units according to the tolerance reduction plan, thereby reducing the tolerance band width of the flexible pipeline; wherein, the tolerance reduction plan is formulated by analyzing each of the target size units segment by segment;

[0108] Step S5: Calculate the offset median of the flexible pipeline layout based on the tolerance zone width of the flexible pipeline, and determine the reserved length of the flexible pipeline based on the offset median.

[0109] This invention provides a pipeline layout optimization method based on flexible pipeline dimension chain calculation. The method involves splitting the dimension chain of flexible pipelines into multiple basic dimension units, calculating the limit deviations of each basic dimension unit, analyzing the limit deviations of each basic dimension unit segment by segment to formulate tolerance reduction schemes, reducing the reserved length of flexible pipelines, avoiding wasted interior space, and finally calculating the median offset based on the reduced limit deviations to determine the reserved length of the flexible pipelines, thereby improving the accuracy of pipeline layout.

[0110] In step S1, as follows Figure 2 As shown, this embodiment takes the arrangement of starter motor lines of varying lengths as an example, and divides it into multiple basic size units A to K, thereby enabling the analysis of the assembly errors of each basic size unit.

[0111] In step S2, the first limit deviation value of each of the basic size units includes:

[0112] The first limit deviation value between the positioning color mark and the positioning bolt; the first limit deviation value between the wiring harness mounting bracket and the engine rear overhang; the first limit deviation value at the bend of the first wiring harness mounting beam; the first limit deviation value between the wiring harness installation and the bracket inside and outside; the first limit deviation value at the bend of the second wiring harness mounting beam; the first limit deviation value at the bend of the wiring harness installation; the first limit deviation value between the wiring harness installation and the cable tie fixing inside and outside.

[0113] Accordingly, based on the deviation value calculation formula corresponding to each basic size unit, the first limit deviation value of each basic size unit is calculated, specifically as follows:

[0114] Based on the width of the positioning bolt and the width of the wire harness color mark, calculate the first limit deviation value between the positioning color mark and the positioning bolt, for example, calculate the limit deviation value of segment A in the embodiment of the present invention;

[0115] Based on the distance in the x-axis direction between the current wiring harness mounting bracket and the previous fixing point and the maximum offset of the flexible pipeline at the current fixing point, calculate the first limit deviation value between the wiring harness mounting bracket and the engine rear overhang, for example, calculate the limit deviation value of segment B in the embodiment of the present invention;

[0116] Based on the bending amount of the wiring harness and the distances in the x and y directions between two adjacent fixed points, calculate the first limit deviation value at the bend of the first wiring harness mounting beam, for example, the limit deviation value of segment C in the embodiment of the present invention;

[0117] Based on the distance in the x-axis direction between the current wiring harness mounting bracket and the previous fixing point and the maximum offset of the flexible pipeline at the current fixing point, calculate the first limit deviation value of the wiring harness installation inside and outside the bracket, such as the limit deviation value of segment D in the embodiment of the present invention;

[0118] Based on the distances in the x, y, and z axes between the two ends of the wire harness turning point and the minimum turning limit of the wire harness, calculate the first limit deviation value at the bend of the second wire harness mounting beam, such as the limit deviation values ​​of segments E, F, H, and I in the embodiment of the present invention;

[0119] Based on the fixed radius of the wire harness, the radius of the thick wire of the wire harness, the radius of the thin wire of the wire harness, and the turning angle of the wire harness, calculate the first limit deviation value at the bend of the wire harness installation, such as the limit deviation value of segment G in the embodiment of the present invention;

[0120] Based on the distance in the x-axis direction between the current fixing point and the previous fixing point of the wire harness installation and the maximum offset of the flexible pipeline at the current fixing point, calculate the first limit deviation value of the wire harness installation and the cable tie fixing, for example, the limit deviation value of segment J in the embodiment of the present invention.

[0121] This invention specifically illustrates the limit deviation values ​​that need to be calculated for each basic dimensional unit and the digital model dimensions that need to be measured to calculate the limit deviation values. By calculating the limit deviation values, the main basic dimensional units that cause the deviation of the flexible pipeline can be analyzed. When formulating tolerance reduction schemes, these main basic dimensional units can be optimized to improve the optimization efficiency and effect of pipeline layout optimization.

[0122] Furthermore, the calculation of the first limit deviation value between the positioning color mark and the positioning bolt is specifically as follows:

[0123]

[0124] Among them, X 1+ X represents the limit deviation value for the actual pipeline being too short between the positioning color mark and the positioning bolt. 1- This indicates the limit deviation value of the actual pipeline length between the positioning color mark and the positioning bolt. K1 is the width of the positioning bolt head, and K2 is the width of the wire harness color mark.

[0125] Furthermore, the calculation of the first limit deviation value between the wiring harness mounting bracket and the engine rear overhang is specifically as follows:

[0126]

[0127] Among them, X 2+ x2 is the limit deviation value of the actual pipeline being too short between the wiring harness mounting bracket and the engine rear overhang, x2 is the distance in the x-axis direction between the current fixing point and the previous fixing point of the wiring harness mounting bracket, and T2 is the maximum offset of the flexible pipeline at the current fixing point.

[0128] Furthermore, the calculation of the first limit deviation value at the bend of the first wire harness installation beam is specifically as follows:

[0129]

[0130]

[0131] Among them, X 3- X is the limit deviation value of the actual pipeline length at the bend of the first wiring harness installation beam. 3+ R3 represents the limit deviation value for the actual pipeline being too short at the bend of the first wiring harness installation beam, where R3 is the wiring harness turning amount, and x3 and y3 are the distances between two adjacent fixed points in the x-axis and y-axis directions, respectively.

[0132] Furthermore, the calculation of the first limit deviation value between the wiring harness installation and the inside and outside of the bracket is specifically as follows:

[0133]

[0134] Among them, X 4+ x4 represents the limit deviation value of the actual arrangement of the pipeline inside and outside the bracket for the wire harness installation, x4 is the distance in the x-axis direction between the current fixing point and the previous fixing point of the wire harness installation bracket, and T4 is the maximum offset of the flexible pipeline at the current fixing point.

[0135] Furthermore, the calculation of the first limit deviation value at the bend of the second wiring harness mounting beam is specifically as follows:

[0136]

[0137]

[0138]

[0139] Among them, X 5- X represents the limit deviation value of the actual pipeline length at the bend of the second wiring harness installation beam. 5+ The limit deviation value of the actual pipeline arrangement at the bend of the second wiring harness installation beam is too short. x5, y5 and z5 are the distances between the two ends of the wiring harness bend in the x, y and z axes, respectively. α5 is the deflection angle of the wiring harness bend in three-dimensional space, and r is the minimum limit value of the wiring harness bend.

[0140] In one possible implementation, the calculation of the first limit deviation value at the bend in the wiring harness installation is specifically as follows:

[0141] X 6- =0

[0142]

[0143] Among them, X 6- X is the limit deviation value of the actual pipeline length at the bend in the wiring harness installation.6+ R6 is the limit deviation value for the actual arrangement of the pipeline at the bend of the wiring harness installation, where R6 is the fixed radius of the wiring harness, r1 is the radius of the thick wire, r2 is the radius of the thin wire, and α6 is the bend angle of the wiring harness.

[0144] In one possible implementation, the calculation of the first limit deviation value between the wire harness installation and the cable tie fixation is specifically as follows:

[0145]

[0146] Among them, X 7+ The limit deviation value for the actual arrangement of the pipeline inside and outside the wire harness installation and cable tie fixation is the shortest possible value. x7 is the distance in the x-axis direction between the current fixing point and the previous fixing point of the wire harness installation. T7 is the maximum offset of the flexible pipeline at the current fixing point.

[0147] The embodiments of the present invention provide specific calculation formulas for calculating the limit deviation values ​​of each of the basic size units, which fully consider the relative distance between the fixed wire harnesses, the bending angle of the wire harnesses, and the thickness of the wire harnesses themselves, making the calculation of the limit deviation values ​​more reasonable and accurate, providing data reference for pipeline layout optimization, and further improving the accuracy of pipeline layout.

[0148] In step S3, as Figure 3 As shown, the first limit deviation value and the corresponding theoretical length of the digital model of each basic size unit are statistically analyzed to determine the target size unit that needs to be improved. Figure 3 This is a data summary table after calculating the limit deviation values ​​of each basic dimensional unit in this embodiment of the invention. The first column is a basic description of each basic dimensional unit in this embodiment; the second column is the corresponding label of each basic dimensional unit in this embodiment; the third column is the theoretical length of each basic dimensional unit in the digital model in this embodiment; the fourth and fifth columns are the limit deviation values ​​of each basic dimensional unit in this embodiment; and the light gray data in the data summary table, namely C, E, F, and G, are the target dimensional units that need improvement as determined in this embodiment. A tolerance reduction plan will be formulated for these target dimensional units subsequently. Figure 3 Preliminary analysis of the data summary table reveals that the maximum cumulative upper deviation of the pipeline layout is +554.73, which means the motor wire at the switch end is 554.73mm shorter; the maximum cumulative lower deviation is -168.67, which means the motor wire at the switch end is 168.67mm longer. Therefore, assembling the pipeline according to the original plan will result in an assembly deviation of 723.4mm.

[0149] In step S4, the first limit deviation value of each of the target size units is reduced according to the tolerance reduction scheme, specifically as follows:

[0150] By changing the closed loop position of the target size unit, adding positioning color marks to the target size unit, adding mounting brackets to the target size unit, and adjusting the assembly sequence of the target size unit, the single displacement deviation of the target size unit is split into two or more displacement deviations, or the turning deviation of the target size unit is changed into a displacement deviation, thereby reducing the first limit deviation value of each of the target size units. Specifically, based on the analysis of the target size unit in this embodiment, the tolerance reduction scheme is as follows:

[0151] (1) Add a second positioning color mark at the flip bracket (point G) to achieve "short connection" of the overall dimension chain, which can reduce the dimension deviation of point AG from (+491.34, -148.08) to (+45, 0);

[0152] (2) After adding the second positioning color mark, the assembly deviation of the overall dimensional chain is (+108.39, -26);

[0153] (3) Calculate the assembly scheme for the AG segment and the positioning color mark: The assembly deviation of the AD segment (+101.12, -100.5) is not completely within the assembly error absorption range of the second color mark. The assembly deviation at the EG end (+390.22, -47.58) is within the range of assembly error absorption at the second color mark. After reducing the negative deviation of the C ring turning (by adding a turning bracket in the design and ensuring the process turning operation), the assembly deviation of the AD segment (+101.12, -33.6) can meet the assembly requirements.

[0154] (4) Under the premise that the AG segment can meet the color mark positioning, the GK segment is connected first through the process method and then bundled and fixed. That is, the connection point K is used as a positioning point, and the assembly deviation of the AG segment (+45, 0) can be absorbed by the assembly deviation of the HK segment (+62.39, -20.6). The problem of the starter motor line length is solved by adjustment.

[0155] Figure 4 This is a summary table of data before and after the implementation of the reduction plan in this embodiment. The contents of the first 1 to 5 columns of this table are consistent with... Figure 3 The summary table is consistent with the previous one. Columns 6 and 7 show the specific improvement measures for each basic dimensional unit, and columns 8 and 9 show the deviation values ​​of each basic dimensional unit after implementing the tolerance reduction scheme. According to Figure 4 The data in the figure can be used to calculate the offset median of the starter motor wire length in this embodiment. When designing the parts, the starter motor wire length is adjusted according to this offset median. The original design reserved a starter motor wire length of 2250mm. After reserving a starter motor wire length of 2291.2mm according to the offset median, it can make up for the difference in pipeline length caused by changes in turning radius during actual vehicle installation and layout. The deviation between the target loop wire harness fixing tie and the connection point is 1mm, ensuring that there are no length problems during on-site assembly.

[0156] This invention provides various methods for reducing the limit deviation values ​​of basic size units. By changing the position of the closed loop, adding positioning color marks, adding mounting brackets, and adjusting the assembly sequence, the deviation values ​​of basic size units are reduced, thereby reducing the tolerance of flexible pipeline wiring, saving vehicle interior space, and improving the accuracy of pipeline layout.

[0157] Example 2:

[0158] Correspondingly, such as Figure 5 As shown, this embodiment of the invention also provides a pipeline layout optimization device based on flexible pipeline size chain calculation, including a splitting module 10, a deviation value calculation module 20, a statistics module 30, a tolerance reduction module 40, and a reserved length calculation module 50;

[0159] The splitting module 10 is used to split the dimensional chain composed of flexible pipelines into multiple basic dimensional units with the smallest calculation unit, wherein the smallest calculation unit includes a straight section and a turning section.

[0160] The deviation value calculation module 20 is used to calculate the first limit deviation value of each basic size unit according to the deviation value calculation formula corresponding to each basic size unit;

[0161] The statistical module 30 is used to calculate the first limit deviation value and the corresponding theoretical length of the digital model for each basic size unit, and to determine the target size unit that needs to be improved.

[0162] The tolerance reduction module 40 is used to obtain a tolerance reduction scheme and reduce the first limit deviation value of each of the target size units according to the tolerance reduction scheme, thereby reducing the tolerance band width of the flexible pipeline. The tolerance reduction scheme is formulated by analyzing each of the target size units segment by segment.

[0163] The reserved length calculation module 50 is used to calculate the offset median of the pipeline layout of the flexible pipeline based on the tolerance zone width of the flexible pipeline, and to determine the reserved length of the flexible pipeline based on the offset median.

[0164] Furthermore, the first limit deviation values ​​of each of the basic size units include: the first limit deviation value between the positioning color mark and the positioning bolt; the first limit deviation value between the wiring harness mounting bracket and the engine rear overhang; the first limit deviation value at the bend of the first wiring harness mounting beam; the first limit deviation value between the wiring harness installation and the inside and outside of the bracket; the first limit deviation value at the bend of the second wiring harness mounting beam; the first limit deviation value at the bend of the wiring harness installation; and the first limit deviation value between the wiring harness installation and the inside and outside of the cable tie fixation.

[0165] Furthermore, such as Figure 6As shown, the deviation value calculation module 20 includes: a deviation value calculation unit 201 between the positioning color mark and the positioning bolt, a deviation value calculation unit 202 between the mounting bracket and the engine rear overhang, a deviation value calculation unit 203 at the bend of the first wire harness mounting beam, a deviation value calculation unit 204 between the wire harness installation and the bracket, a deviation value calculation unit 205 at the bend of the second wire harness mounting beam, a deviation value calculation unit 206 at the bend of the wire harness installation, and a deviation value calculation unit 207 between the installation and the cable tie fixing.

[0166] The positioning color mark and positioning bolt deviation value calculation unit 201 is used to calculate the first limit deviation value between the positioning color mark and the positioning bolt based on the width of the positioning bolt and the width of the wire harness color mark.

[0167] The mounting bracket and engine rear overhang deviation calculation unit 202 is used to calculate the first limit deviation value between the wiring harness mounting bracket and the engine rear overhang based on the distance in the x-axis direction between the current wiring harness mounting bracket and the previous fixed point and the maximum offset of the flexible pipeline at the current fixed point.

[0168] The first wire harness installation beam bend deviation calculation unit 203 is used to calculate the first limit deviation value at the bend of the first wire harness installation beam based on the wire harness turning amount and the distance in the x-axis and y-axis directions between two adjacent fixed points.

[0169] The wiring harness installation and bracket deviation calculation unit 204 is used to calculate the first limit deviation value between the wiring harness installation and the bracket inside and outside based on the distance in the x-axis direction between the current wiring harness installation bracket and the previous fixed point and the maximum offset of the flexible pipeline at the current fixed point.

[0170] The deviation calculation unit 205 at the bend of the second wire harness installation beam is used to calculate the first limit deviation value at the bend of the second wire harness installation beam based on the distance between the two ends of the wire harness bend in the x, y, and z axis directions and the minimum limit value of the wire harness bend.

[0171] The wire harness installation bend deviation calculation unit 206 is used to calculate the first limit deviation value at the wire harness installation bend based on the wire harness fixed radius, the wire harness thick wire radius, the wire harness thin wire radius and the wire harness bend angle.

[0172] The installation and cable tie fixing deviation calculation unit 207 is used to calculate the first limit deviation value of the installation and cable tie fixing of the wire harness based on the distance in the x-axis direction between the current fixing point and the previous fixing point of the wire harness installation and the maximum offset of the flexible pipeline at the current fixing point.

[0173] In one possible implementation, the calculation of the first limit deviation value between the positioning color mark and the positioning bolt specifically involves:

[0174]

[0175] Among them, X 1+ X represents the limit deviation value for the actual pipeline being too short between the positioning color mark and the positioning bolt. 1- This indicates the limit deviation value of the actual pipeline length between the positioning color mark and the positioning bolt. K1 is the width of the positioning bolt head, and K2 is the width of the wire harness color mark.

[0176] Furthermore, the calculation of the first limit deviation value between the wiring harness mounting bracket and the engine rear overhang is specifically as follows:

[0177]

[0178] Among them, X 2+ x2 is the limit deviation value of the actual pipeline being too short between the wiring harness mounting bracket and the engine rear overhang, x2 is the distance in the x-axis direction between the current fixing point and the previous fixing point of the wiring harness mounting bracket, and T2 is the maximum offset of the flexible pipeline at the current fixing point.

[0179] In one possible implementation, the calculation of the first limit deviation value at the bend of the first wire harness mounting beam specifically involves:

[0180]

[0181]

[0182] Among them, X 3- X is the limit deviation value of the actual pipeline length at the bend of the first wiring harness installation beam. 3+ R3 represents the limit deviation value for the actual pipeline being too short at the bend of the first wiring harness installation beam, where R3 is the wiring harness turning amount, and x3 and y3 are the distances between two adjacent fixed points in the x-axis and y-axis directions, respectively.

[0183] Furthermore, the calculation of the first limit deviation value between the wiring harness installation and the inside and outside of the bracket is specifically as follows:

[0184]

[0185] Among them, X 4+ x4 represents the limit deviation value of the actual arrangement of the pipeline inside and outside the bracket for the wire harness installation, x4 is the distance in the x-axis direction between the current fixing point and the previous fixing point of the wire harness installation bracket, and T4 is the maximum offset of the flexible pipeline at the current fixing point.

[0186] In one possible implementation, the calculation of the first limit deviation value at the bend of the second wiring harness mounting beam specifically involves:

[0187]

[0188]

[0189]

[0190] Among them, X 5- X represents the limit deviation value of the actual pipeline length at the bend of the second wiring harness installation beam. 5+ The limit deviation value of the actual pipeline arrangement at the bend of the second wiring harness installation beam is too short. x5, y5 and z5 are the distances between the two ends of the wiring harness bend in the x, y and z axes, respectively. α5 is the deflection angle of the wiring harness bend in three-dimensional space, and r is the minimum limit value of the wiring harness bend.

[0191] Furthermore, the calculation of the first limit deviation value at the bend in the wiring harness installation is specifically as follows:

[0192] X 6- =0

[0193]

[0194] Among them, X 6- X represents the limit deviation value of the actual pipeline length at the bend in the wiring harness installation. 6+ R6 is the limit deviation value for the actual arrangement of the pipeline at the bend of the wiring harness installation, where R6 is the fixed radius of the wiring harness, r1 is the radius of the thick wire, r2 is the radius of the thin wire, and α6 is the bend angle of the wiring harness.

[0195] In one possible implementation, the calculation of the first limit deviation value between the wire harness installation and the cable tie fixation is specifically as follows:

[0196]

[0197] Among them, X 7+ The limit deviation value for the actual arrangement of the pipeline inside and outside the wire harness installation and cable tie fixation is the shortest possible value. x7 is the distance in the x-axis direction between the current fixing point and the previous fixing point of the wire harness installation. T7 is the maximum offset of the flexible pipeline at the current fixing point.

[0198] Furthermore, the tolerance reduction module 40 reduces the first limit deviation value of each of the target size units according to the tolerance reduction scheme, specifically as follows:

[0199] By changing the closed loop position of the target size unit, adding the positioning color mark of the target size unit, adding the mounting bracket of the target size unit, and adjusting the assembly sequence of the target size unit, the single displacement deviation of the target size unit is split into two or more displacement deviations, or the turning deviation of the target size unit is changed into a displacement deviation, thereby reducing the first limit deviation value of each of the target size units.

[0200] This invention provides a pipeline layout optimization device based on flexible pipeline dimension chain calculation. It breaks down the dimension chain of flexible pipelines into multiple basic dimension units, calculates the limit deviations of each basic dimension unit, analyzes the limit deviations of each basic dimension unit segment by segment to formulate tolerance reduction schemes to reduce each limit deviation, thereby reducing the reserved length of the flexible pipeline and avoiding wasted interior space. Finally, it calculates the median offset based on the reduced limit deviations to determine the reserved length of the flexible pipeline, improving the accuracy of pipeline layout.

[0201] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the scope of protection of the present invention. In particular, it should be noted that any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention for those skilled in the art.

Claims

1. A pipeline layout optimization method based on flexible pipeline dimension chain calculation, characterized in that, include: The dimensional chain link composed of flexible pipelines is divided into multiple basic dimensional units by the smallest calculation unit, which includes straight sections and turning sections; Calculate the first limit deviation value of each basic dimension unit according to the deviation value calculation formula corresponding to each basic dimension unit; By statistically analyzing the first limit deviation value and the corresponding theoretical length of the digital model for each of the basic size units, the target size unit that needs to be improved is determined. A tolerance reduction scheme is obtained, and the first limit deviation value of each of the target size units is reduced according to the tolerance reduction scheme, thereby reducing the tolerance band width of the flexible pipeline; wherein, the tolerance reduction scheme is formulated by analyzing each of the target size units segment by segment; Based on the tolerance zone width of the flexible pipeline, calculate the median offset of the pipeline layout of the flexible pipeline, and determine the reserved length of the flexible pipeline based on the median offset; Based on the deviation calculation formula corresponding to each basic size unit, the first limit deviation value of each basic size unit is calculated, specifically as follows: Calculate the first limit deviation value between the positioning color mark and the positioning bolt based on the width of the positioning bolt and the width of the wire harness color mark; Based on the distance in the x-axis direction between the current wiring harness mounting bracket and the previous fixing point and the maximum offset of the flexible pipeline at the current fixing point, calculate the first limit deviation value between the wiring harness mounting bracket and the engine rear overhang. Calculate the first limit deviation value at the bend of the first wire harness installation beam based on the wire harness turning amount and the distance between two adjacent fixed points in the x and y directions. Based on the distance in the x-axis direction between the current wiring harness mounting bracket and the previous fixing point and the maximum offset of the flexible pipeline at the current fixing point, calculate the first limit deviation value between the wiring harness installation and the bracket inside and outside; Based on the distances in the x, y, and z axes between the two ends of the wire harness turning point and the minimum turning limit of the wire harness, calculate the first limit deviation value at the bend of the second wire harness installation beam; Calculate the first limit deviation value at the bend of the wire harness installation based on the fixed radius of the wire harness, the radius of the thick wire of the wire harness, the radius of the thin wire of the wire harness, and the bend angle of the wire harness. Based on the distance in the x-axis direction between the current fixing point and the previous fixing point of the wire harness installation and the maximum offset of the flexible pipeline at the current fixing point, calculate the first limit deviation value between the wire harness installation and the cable tie fixing.

2. The pipeline layout optimization method based on flexible pipeline dimension chain calculation as described in claim 1, characterized in that, The calculation of the first limit deviation value between the positioning color mark and the positioning bolt is specifically as follows: in, This represents the limit deviation value for the actual pipeline being too short between the positioning color mark and the positioning bolt. This indicates the limit deviation value of the actual pipeline length between the positioning color mark and the positioning bolt. The width of the positioning bolt head, Wiring harness color code width.

3. The pipeline layout optimization method based on flexible pipeline dimension chain calculation as described in claim 1, characterized in that, The first limit deviation value between the wiring harness mounting bracket and the engine rear overhang is specifically calculated as follows: in, This refers to the limit deviation value for the actual length of the pipeline laid out between the wiring harness mounting bracket and the engine rear overhang. The distance along the x-axis between the current fixing point and the previous fixing point of the wiring harness mounting bracket. This is the maximum offset of the flexible pipeline at its current fixed position.

4. The pipeline layout optimization method based on flexible pipeline dimension chain calculation as described in claim 1, characterized in that, The calculation of the first limit deviation value at the bend of the first wire harness installation beam is specifically as follows: in, This represents the limit deviation value for the actual pipeline length at the bend of the first wiring harness installation beam. This represents the limit deviation value for the actual pipeline length being too short at the bend of the first wiring harness installation beam. For the wiring harness bending distance, and This represents the distance between two adjacent fixed points along the x-axis and y-axis.

5. The pipeline layout optimization method based on flexible pipeline dimension chain calculation as described in claim 1, characterized in that, The calculation of the first limit deviation value between the wiring harness installation and the inside and outside of the bracket is specifically as follows: in, This represents the limit deviation value for the actual length of the conduit installed within and outside the bracket, which is shorter than the actual length of the conduit. The distance along the x-axis between the current fixing point and the previous fixing point of the wiring harness mounting bracket. This is the maximum offset of the flexible pipeline at its current fixed position.

6. The pipeline layout optimization method based on flexible pipeline dimension chain calculation as described in claim 1, characterized in that, The calculation of the first limit deviation value at the bend in the wiring harness installation is specifically as follows: in, The limit deviation value for the actual length of the pipeline at the bend in the wiring harness installation. The limit deviation value for the actual length of the pipeline at the bend in the wiring harness installation is too short. To fix the radius of the wire harness, For the thick line radius, The radius of the thin line, This refers to the turning angle of the wiring harness.

7. The pipeline layout optimization method based on flexible pipeline dimension chain calculation as described in claim 1, characterized in that, The calculation of the first limit deviation value between the wire harness installation and the cable tie fixation is specifically as follows: in, The limit deviation value for the actual arrangement of pipelines inside and outside the wiring harness installation and cable tie fixing is considered to be shorter than intended. The distance along the x-axis between the current mounting point and the previous mounting point for the wire harness. This is the maximum offset of the flexible pipeline at its current fixed position.

8. The pipeline layout optimization method based on flexible pipeline dimension chain calculation as described in claim 1, characterized in that, The first limit deviation value of each of the target size units is reduced according to the tolerance reduction scheme, specifically as follows: By changing the closed loop position of the target size unit, adding the positioning color mark of the target size unit, adding the mounting bracket of the target size unit, and adjusting the assembly sequence of the target size unit, the single displacement deviation of the target size unit is split into two or more displacement deviations, or the turning deviation of the target size unit is changed into a displacement deviation, thereby reducing the first limit deviation value of each of the target size units.

9. A pipeline layout optimization device based on flexible pipeline dimension chain calculation, characterized in that, It includes a splitting module, a deviation value calculation module, a statistics module, a tolerance reduction module, and a reserved length calculation module; The splitting module is used to split the dimensional chain of flexible pipelines into multiple basic dimensional units with the smallest calculation unit, and the smallest calculation unit includes straight sections and turning sections. The deviation value calculation module is used to calculate the first limit deviation value of each basic size unit according to the deviation value calculation formula corresponding to each basic size unit; The statistical module is used to calculate the first limit deviation value and the corresponding theoretical length of the digital model for each of the basic size units, and to determine the target size unit that needs to be improved. The tolerance reduction module is used to obtain a tolerance reduction scheme and reduce the first limit deviation value of each of the target size units according to the tolerance reduction scheme, thereby reducing the tolerance band width of the flexible pipeline. The tolerance reduction scheme is formulated by analyzing each of the target size units segment by segment. The reserved length calculation module is used to calculate the offset median of the pipeline layout of the flexible pipeline based on the tolerance zone width of the flexible pipeline, and to determine the reserved length of the flexible pipeline based on the offset median. The deviation calculation module includes: a deviation calculation unit for positioning color mark and positioning bolt, a deviation calculation unit for mounting bracket and engine rear overhang, a deviation calculation unit for the first wiring harness mounting beam bend, a deviation calculation unit for wiring harness installation and bracket, a deviation calculation unit for the second wiring harness mounting beam bend, a deviation calculation unit for wiring harness installation bend, and a deviation calculation unit for installation and cable tie fixing. The positioning color mark and positioning bolt deviation calculation unit is used to calculate the first limit deviation value between the positioning color mark and the positioning bolt based on the width of the positioning bolt and the width of the wire harness color mark. The mounting bracket and engine rear overhang deviation calculation unit is used to calculate the first limit deviation value between the wiring harness mounting bracket and the engine rear overhang based on the distance in the x-axis direction between the current wiring harness mounting bracket and the previous fixed point and the maximum offset of the flexible pipeline at the current fixed point. The first wire harness installation beam bend deviation calculation unit is used to calculate the first limit deviation value at the bend of the first wire harness installation beam based on the wire harness turning amount and the distance between two adjacent fixed points in the x-axis and y-axis directions. The wiring harness installation and bracket deviation calculation unit is used to calculate the first limit deviation value between the wiring harness installation and the bracket inside and outside based on the distance in the x-axis direction between the current wiring harness installation bracket and the previous fixed point and the maximum offset of the flexible pipeline at the current fixed point. The deviation calculation unit at the bend of the second wire harness installation beam is used to calculate the first limit deviation value at the bend of the second wire harness installation beam based on the distance between the two ends of the wire harness bend in the x, y, and z axes and the minimum limit value of the wire harness bend. The wire harness installation bend deviation calculation unit is used to calculate the first limit deviation value at the wire harness installation bend based on the wire harness fixed radius, the wire harness thick wire radius, the wire harness thin wire radius and the wire harness bend angle; The installation and cable tie fixing deviation calculation unit is used to calculate the first limit deviation value of the installation and cable tie fixing of the wire harness based on the distance in the x-axis direction between the current fixing point and the previous fixing point of the wire harness installation and the maximum offset of the flexible pipeline at the current fixing point.

10. The pipeline layout optimization device based on flexible pipeline dimension chain calculation as described in claim 9, characterized in that, The calculation of the first limit deviation value between the positioning color mark and the positioning bolt is specifically as follows: in, This represents the limit deviation value for the actual pipeline being too short between the positioning color mark and the positioning bolt. This indicates the limit deviation value of the actual pipeline length between the positioning color mark and the positioning bolt. The width of the positioning bolt head, Wiring harness color code width.

11. The pipeline layout optimization device based on flexible pipeline dimension chain calculation as described in claim 9, characterized in that, The first limit deviation value between the wiring harness mounting bracket and the engine rear overhang is specifically calculated as follows: in, This refers to the limit deviation value for the actual length of the pipeline laid out between the wiring harness mounting bracket and the engine rear overhang. The distance along the x-axis between the current fixing point and the previous fixing point of the wiring harness mounting bracket. This is the maximum offset of the flexible pipeline at its current fixed position.

12. The pipeline layout optimization device based on flexible pipeline dimension chain calculation as described in claim 9, characterized in that, The calculation of the first limit deviation value at the bend of the first wire harness installation beam is specifically as follows: in, This represents the limit deviation value for the actual pipeline length at the bend of the first wiring harness installation beam. This represents the limit deviation value for the actual pipeline length being too short at the bend of the first wiring harness installation beam. For the wiring harness bending distance, and This represents the distance between two adjacent fixed points along the x-axis and y-axis.

13. The pipeline layout optimization device based on flexible pipeline dimension chain calculation as described in claim 9, characterized in that, The calculation of the first limit deviation value between the wiring harness installation and the inside and outside of the bracket is specifically as follows: in, This represents the limit deviation value for the actual length of the conduit installed between the wiring harness and the bracket, where the conduit is shorter than intended. The distance along the x-axis between the current fixing point and the previous fixing point of the wiring harness mounting bracket. This is the maximum offset of the flexible pipeline at its current fixed position.

14. The pipeline layout optimization device based on flexible pipeline dimension chain calculation as described in claim 9, characterized in that, The calculation of the first limit deviation value at the bend in the wiring harness installation is specifically as follows: in, The limit deviation value for the actual length of the pipeline at the bend in the wiring harness installation. The limit deviation value for the actual length of the pipeline at the bend in the wiring harness installation is too short. To fix the radius of the wire harness, For the thick line radius, The radius of the thin line, This refers to the turning angle of the wiring harness.

15. The pipeline layout optimization device based on flexible pipeline dimension chain calculation as described in claim 9, characterized in that, The calculation of the first limit deviation value between the wire harness installation and the cable tie fixation is specifically as follows: in, The limit deviation value for the actual arrangement of pipelines inside and outside the wiring harness installation and cable tie fixing is considered to be too short. The distance along the x-axis between the current mounting point and the previous mounting point for the wire harness. This is the maximum offset of the flexible pipeline at its current fixed position.

16. The pipeline layout optimization device based on flexible pipeline dimension chain calculation as described in claim 9, characterized in that, The tolerance reduction module reduces the first limit deviation value of each of the target size units according to the tolerance reduction scheme, specifically as follows: By changing the closed loop position of the target size unit, adding the positioning color mark of the target size unit, adding the mounting bracket of the target size unit, and adjusting the assembly sequence of the target size unit, the single displacement deviation of the target size unit is split into two or more displacement deviations, or the turning deviation of the target size unit is changed into a displacement deviation, thereby reducing the first limit deviation value of each of the target size units.

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