CN108416137B - Method for conveniently dividing and tracking simplified expression standard part in aircraft manufacturing - Google Patents
Method for conveniently dividing and tracking simplified expression standard part in aircraft manufacturing Download PDFInfo
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Abstract
The invention belongs to the technical field of airplane digital manufacturing, and provides a method for conveniently dividing and tracking simplified expression standard parts in airplane manufacturing, which mainly comprises the following four steps: 1) acquiring the hierarchical structure of the parameter set in the three-dimensional model and the linear position of each positioning nail hole point; 2) instantiating the simplified expression standard parts, and calculating the position of each standard part; 3) the instantiated standard parts are divided in a consumption mode in the process procedure; 4) analyzing the three-dimensional model, judging the change type of the standard component expressed by the model, and tracking and positioning. The invention realizes instantiation management of the simplified expression standard component, effectively solves the phenomenon of missing use or repeated use of the simplified standard component in the use process, and reduces the occurrence rate of errors of the type in the dividing process to zero; the efficiency of change implementation is improved.
Description
Technical Field
The invention belongs to the technical field of airplane digital manufacturing, and provides a method for dividing and tracking simplified expression standard parts in airplane manufacturing.
Background
The standard parts needed in the aircraft manufacturing process are very many, and if the standard parts are expressed in a single instance and are provided with a solid three-dimensional model in the design stage, the three-dimensional model of the aircraft is too large, and the three-dimensional model is inconvenient to change, store and view. In this case, it is necessary to simplify the expression of a part of the standard, and it is a conventional method to use a line to indicate the position of a nail hole point and to mark the standard used at the nail hole point. A three-dimensional model file is used for storing the information, and the lines are organized and classified by using a tree structure. As shown in fig. 1, dotted line set 1 means that the HBXXX1 and HBXXX2 standard are installed at the positions of both straight lines 1 and 2. Meanwhile, if the standard parts have symmetrical structures, the work is not required to be repeated, and only the three-dimensional model file (the reverse part) is required to record which three-dimensional model file has the symmetrical structure of the standard part. The tree structure that organizes such simplified expressions varies from requirement to requirement, but the meaning of the expressions is about the same.
The method solves a series of problems caused by large using amount of standard parts in the design stage, but causes great trouble in the process using stage. Each three-dimensional model file for the standard parts comprises a large number of standard parts, the standard parts need to be divided into a plurality of process rules in the actual use process, and only structural information and straight line position information are recorded in the file, and each straight line represents the installation positions of the plurality of standard parts, so that only the standard part of which figure number is used and the use number can be recorded in the process rules. If the three-dimensional model file is changed, the process rules influenced by the change cannot be quickly positioned, and all process rules using the three-dimensional model need to be checked. If the reverse piece in the symmetrical piece is used in the process procedure, the change needs to be carried out by referring to the display piece in the symmetrical piece. In the aviation industry, the three-dimensional model files are changed in a large amount, the phenomenon that standard parts in process specifications are inconsistent with standard parts expressed in the three-dimensional model files in the number or the number is easily caused after the three-dimensional model files are changed in a large amount, an effective mechanism is not provided for checking the inconsistency, and the inconsistency can be checked and compared only by manpower.
Disclosure of Invention
The invention provides a method for conveniently dividing and tracking simplified expression standard parts, aiming at the problems of complex management, large workload, inaccurate data and the like of a manufacturing end caused by the fact that a design end uses a large number of simplified expression standard parts to issue three-dimensional models in the current aviation manufacturing industry. The method has the characteristics of high efficiency, high data accuracy, high computer aided degree and the like.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a method for facilitating division and tracking of a simplified representation standard in aircraft manufacturing, comprising the steps of:
firstly, acquiring the hierarchical structure of a parameter set in a three-dimensional model and the linear position of each positioning nail hole point
a) Obtaining the relative position M of the three-dimensional model fileD(pd，Td) Wherein p isdAs a starting point, TdIs a deflection matrix. Acquiring a three-dimensional model file of a simplified expression standard part, reading MBD information, judging whether the three-dimensional model file is a symmetrical part, if not, entering the step b to analyze structural information, if so, continuously judging whether the file is a display part or a reverse part in the symmetrical part, if so, directly entering the step b, and if not, acquiring the three-dimensional model file of the display part and markingThen step b is entered.
b) Reading the hierarchical structure for organizing the standard parts in the three-dimensional model file, and the picture numbers and the straight line names of the standard parts.
c) And reading the information of each straight line, wherein the information comprises a starting point, a direction and a length.
And temporarily storing the information acquired in the step for subsequent processing.
Secondly, instantiating the simplified expression standard parts and calculating the position of each standard part
a) Instantiating the simplified expression standard according to the hierarchical structure obtained in the first step:
set the straight lines L { L under the same level1，l2，l3，......，lnSet of standards N { N }1，n2，n3，......，nmCarrying out Cartesian product operation:
S＝N×L＝{(n1,l1),(n1,l2)……(n1,ln),……(nm,l1),(nm,l2)……(nm,ln)}
＝{s1,s2,s3……sy}
the set S is a set of instantiated standards.
b) For each standard instance S in the set SiIs a straight line liThe location of the location; if the three-dimensional file origin position Md(pd，Td) If the position is not the origin in the global position, the global position of the standard component needs to be calculated, and only two end points (p) of the straight line are neededi1，pi2) Calculating the starting point and end point positions pi1′、pi2', wherein
pij′＝pij×Td+pd(ii) a If the file is the reverse of a symmetric piece, p also needs to be calculatedij", which is pij' is a point of symmetry about a plane of symmetry.
c) For each standard instance siCalculating and generating a unique code c according to the path of the level in which the unique code c is positioned, the straight line name and the labeliObtaining the unique code set C { C) of all the examples under the three-dimensional model file1，c2，......cnAnd record ciAnd siThe corresponding relationship of (1).
And (3) creating a database table, taking the set C as a main key, and storing the information of the set S, wherein the stored content comprises unique codes, instance numbers, drawing numbers, path information and position information.
Thirdly, analyzing for the first time, and dividing instantiated standard parts in a consumption type in the process procedure
For the standard example s obtained in the second stepiTo the process rule A { a }1，a2，a3......anConsumption partitioning, creating database table records siDividing the relation into A. Dividing S into AiAnd marking the divided standard parts in the database, wherein the standard parts with the marks cannot be divided again, so that repeated division is avoided. And inquiring the example information without division marks in the database, obtaining the standard component without division and reminding to avoid neglected loading.
And fourthly, analyzing the three-dimensional model, judging the change type of the standard component expressed by the model, and tracking and positioning.
If the three-dimensional model file with the same number is changed and then issued again, the first step and the second step are executed in sequence to obtain an instantiation standard component set SaAnd number set CaComparison sets C and Ca：
If c isiC and C isi∈CaThen c is requirediCorresponding s1，sa1If the positions are different, locating s1Is divided into ax。
If c isiIs epsilon of C and
then locate ciCorresponds to s1Is divided into ax。
If it is not
And c isi∈CaThen the third step of repartitioning is performed.
The simplified expression standard component divided by the steps can not only ensure the accuracy of data, but also track the direction of the standard component and quickly position and change.
The invention has the beneficial effects that: the invention realizes instantiation management of the simplified expression standard component, effectively solves the phenomenon of missing use or repeated use of the simplified expression standard component in the use process, and reduces the occurrence rate of the errors in the dividing process to zero. Aiming at simplifying the change of the expression standard part, the invention provides a method for positioning the change of the standard part to a specific process procedure, and improves the efficiency of the change implementation.
Drawings
FIG. 1 is a diagram of an implementation process of instantiation, consumption-type partitioning of a simplified representation standard.
FIG. 2 is a simplified instantiation, partitioning, and alteration process of an expression standard.
Detailed Description
The first invention is further described below with reference to specific embodiments, which is mainly divided into four steps, as shown in fig. 2: 1) acquiring the hierarchical structure of the parameter set in the three-dimensional model and the linear position of each positioning nail hole point; 2) instantiating the simplified expression standard parts, and calculating the position of each standard part; 3) the instantiated standard parts are divided in a consumption mode in the process procedure; 4) analyzing the three-dimensional model, judging the change type of the standard component expressed by the model, and tracking and positioning. Now, the following description is specifically provided in conjunction with the data processing method:
the step 1) carries out secondary development and reads data in the three-dimensional model file through an interface provided by three-dimensional design software:
a) relative position M of the three-dimensional model filed(pd，Td) Wherein p isdAs a starting point, TdIs a deflection matrix. Obtaining three-dimensional model file of simplified expression standard component, and readingAnd B, judging whether the three-dimensional model file is a symmetrical part or not by the MBD information, if not, entering the step b, if so, continuously judging whether the file is a display part or a reverse part in the symmetrical part, if so, directly entering the step b, and if the file is the reverse part, acquiring the three-dimensional model file of the display part and marking the three-dimensional model file, and then entering the step b.
b) Reading the hierarchical structure for organizing the standard parts in the three-dimensional model file, and the picture numbers and the straight line names of the standard parts.
c) The information of each line is read, and the information comprises a starting point, a direction and a length.
And temporarily storing the information acquired in the step for subsequent processing.
Step 2) instantiating the simplified expression standard component according to the hierarchical structure information acquired in step 1):
the straight lines under the same level are collected into L { L }1，l2，l3，......，lnSet of standards N { N }1，n2，n3，......，nmCarrying out Cartesian product operation:
S＝N×L＝{(n1,l1),(n1,l2)……(n1,ln),……(nm,l1),(nm,l2)……(nm,ln)}
＝{s1,s2,s3……sy}
the set S is a set of instantiated standards.
For each standard instance S in the set SiIs a straight line liAt the position of the three-dimensional file origin Md(pd，Td) If the position is not the origin in the global position, the global position of the standard component needs to be calculated, and only two end points (p) of the straight line are neededi1，pi2) Calculating the starting point and end point positions pi1′、pi2', wherein pij′＝pij×Td+pd(ii) a If the file is the reverse of a symmetric piece, p also needs to be calculatedij", itIs pij' point of symmetry about the plane of symmetry.
For each standard instance siThe unique code is calculated from the way of the level where it is located + the line name + the label. For example, the serial number of a part HBXXX1.1 arranged on a nail hole point marked by a line 1 under a line 1 in FIG. 1 is calculated according to MD5 codes of 'XX three-dimensional model file \ point line set 1\ line 1\ HBXXX 1.1', and a unique code c with a fixed length is generatediObtaining the unique code set C { C) of all the examples under the three-dimensional model file1，c2，......cnAnd record ciAnd siThe corresponding relationship of (1).
And (3) creating a database table, taking the set C as a main key, and storing the information of the set S, wherein the stored content comprises a unique number, an instance number, a drawing number, path information and position information.
The step 3) is to the standard component example s obtained in the step 2)iTo the process rule A { a }1，a2，a3......anConsumption partitioning, creating database table records siDividing the relation into A. Dividing S into AiAnd marking the divided standard parts in the database, wherein the standard parts with the marks cannot be divided again, so that repeated division is avoided. And inquiring the example information without division marks in the database, obtaining the standard parts which are not divided, and reminding to avoid neglected loading.
The parts already divided in S can be recorded by using S'; and the unused standard part can be recorded and reminded by an operator by using the S ═ S-S', so that the omission can be prevented. And for siThe standard element belonging to the S' can not be divided into A again, and repeated division is avoided.
Step 4) processing the three-dimensional model file again after being changed, and sequentially executing the steps 1) and 2) to obtain an instantiated standard component set SaAnd number set CaComparison set C, Ca：
If c isiC and C isi∈CaThen c is requirediCorresponding s1，sa1If the positions are the same, marking c in the databasei∈CaTo be divided, if the positions are different, then position s1Is divided into ax。
If c isiIs epsilon of C and
then locate ciCorresponds to s1Is divided into ax。
If it is not
And c isi∈CaThen step 3) of repartitioning is performed.
Claims (1)
1. A method for facilitating division and tracking of simplified presentation standard components in aircraft manufacturing is characterized by the steps of:
firstly, acquiring the hierarchical structure of a parameter set in a three-dimensional model and the linear position of each positioning nail hole point
a) Obtaining the relative position M of the three-dimensional model filed(pd，Td) Wherein p isdAs a starting point, TdIs a deflection matrix; acquiring a three-dimensional model file of a simplified expression standard part, reading MBD information, judging whether the three-dimensional model file is a symmetrical part or not, if not, entering the step b to analyze structural information, if so, continuously judging whether the file is a display part or a reverse part in the symmetrical part, if so, directly entering the step b, and if the file is the reverse part, acquiring the three-dimensional model file of the display part and marking the three-dimensional model file, and then entering the step b;
b) reading a hierarchical structure used for organizing the standard part in the three-dimensional model file, and the picture number and the straight line name of the standard part;
c) reading the information of each straight line, wherein the information comprises a starting point, a direction and a length;
temporarily storing the information obtained in the step for subsequent processing;
secondly, instantiating the simplified expression standard parts and calculating the position of each standard part
a) Instantiating the simplified expression standard according to the hierarchical structure obtained in the first step:
set the straight lines L { L under the same level1，l2，l3，......，lnSet of standards N { N }1，n2，n3，......，nmCarrying out Cartesian product operation:
S＝N×L＝{(n1，l1)，(n1，l2)……(n1，ln)，……(nm，l1)，(nm，l2)……(nm，ln)}
＝{s1，s2，s3……sy}
the set S is a set of instantiated standard parts;
b) for each standard instance S in the set SiIs a straight line liThe location of the location; if the three-dimensional file origin position Md(pd，Td) If the position is not the origin in the global position, the global position of the standard component needs to be calculated, and only two end points (p) of the straight line are neededi1，pi2) Calculating the starting point and end point positions pi1′、pi2', wherein
pij′＝pij×Td+pd(ii) a If the file is the reverse of a symmetric piece, p also needs to be calculatedij", which is pij' is a point of symmetry about a plane of symmetry;
c) for each standard instance siCalculating and generating a unique code c according to the path of the level in which the unique code c is positioned, the straight line name and the labeliObtaining the unique code set C { C) of all the examples under the three-dimensional model file1，c2，......cnAnd record ciAnd siThe corresponding relationship of (a);
creating a database table, taking the set C as a main key, and storing the information of the set S, wherein the stored content comprises unique codes, instance numbers, drawing numbers, path information and position information;
thirdly, analyzing for the first time, and dividing instantiated standard parts in a consumption type in the process procedure
For the standard example s obtained in the second stepiTo the process rule A { a }1，a2，a3......anConsumption partitioning, creating database table records siDividing the relation into A; dividing S into AiMarking the divided standard components in a database, wherein the standard components with the marks cannot be divided again, so that repeated division is avoided; the instance information without division marks in the database is inquired, and the undivided standard component can be obtained and reminded, so that neglected loading is avoided;
fourthly, analyzing the three-dimensional model, judging the change type of the standard component expressed by the model, and tracking and positioning;
if the three-dimensional model file with the same number is changed and then issued again, the first step and the second step are executed in sequence to obtain an instantiation standard component set SaAnd number set CaComparison sets C and Ca：
If c isiC and C isi∈CaThen c is requirediCorresponding s1，sa1If the positions are different, locating s1Is divided into ax；
If c isiIs epsilon of C and
then locate ciCorresponds to s1Is divided into ax；
If it is not
And c isi∈CaThen the third step of repartitioning is performed.
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| CN111143480B (en) * | 2019-12-17 | 2023-03-21 | 李�荣 | Method for conveniently dividing and tracking simplified expression standard part in aircraft manufacturing |
| CN111368368B (en) * | 2020-02-26 | 2023-02-17 | 江南造船(集团)有限责任公司 | Method and device for constructing ship piping component library, storage medium and terminal |
| CN116976208B (en) * | 2023-07-28 | 2024-06-18 | 沈阳飞机工业（集团）有限公司 | Aviation fastener dividing method based on machine learning |
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