CN102968520A - Product assembling technology generation method based on assembling process simulation - Google Patents
Product assembling technology generation method based on assembling process simulation Download PDFInfo
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Abstract
The invention provides a product assembling technology generation method based on assembling process simulation, which can be used for mapping an information model formed in the assembling simulation process into a product assembling technology. The product assembling technology generation method based on the assembling process simulation comprises four steps of product virtual assembling process simulation, product assembling simulation process information model establishment, product assembling simulation process information model to product assembling technology model mapping, and assembling operation card and detailed statement output. On the basis of a three-dimensional model, the method is characterized in that the product assembling process is subjected to real-time dynamic simulation in a man-machine interaction mode, an initial product assembling technology is formed by the record of the assembling simulation process information, finally, revision adaptive to the practical situation is carried out by the initial product assembling technology, and therefore an assembling technical document satisfying the practical enterprise requirement can be formed.
Description
Technical field
The invention belongs to mechanical engineering field, particularly a kind of method and device that generates based on the assembling process of products of assembly process simulation.
Background technology
Because the complicacy of assembly problem, the assembly process planning of complex product is that electromechanical product design is made the weak link in integrated always, particularly for complex products such as guided missile, satellites, because it has many kinds, become in batches, the assembly precision requirement is high, the assembling packed density is large, take manual setting as main and sometimes also require the characteristics such as security assembling or nonreversibility assembling, its assembly process planning and optimization problem are focus and the difficult points in the engineering always.
The appearance of virtual assembly process planning technology is for providing an effective approach from the relative present situation that falls behind with the assembly process planning technology that changes present complex mechanical product of the many-side research assembly process plannings such as how much, physics, process.Utilize the interactivity (Interactivity) of virtual reality, the property immersed (immersion) and real-time (Real-time), can be the technologist provides the interactive environment of a kind of high fidelity, nature, the people can directly carry out mutual assembly simulation operation to Virtual prototype in this environment, carry out process planning to man-machine coordination, and observe in real time assembling process and produce an effect thereof.This working method has changed traditional assembly process planning mode of operation, has brought into play to greatest extent people's wisdom and creativity.
The workflow of virtual assembly process planning technology can be divided into four-stage, and namely model data is obtained the making-up shop modelling phase at stage, facing to manufacture scene, initial assembly technology generation phase and assembly technology post-processing stages.1) to obtain the task in stage be by neutral interface document the three-dimensional modeling data in the design systems such as Pro/E or UG to be imported to virtual environment and carries out model data reconstruct to model data; 2) task of the making-up shop modelling phase at facing to manufacture scene is to set up the assembly process planning immersion scene similar to the erecting yard height, comprises parts to be assembled, instrument, anchor clamps, suspender, operator's console etc. in this scene; 3) to be man-machine interaction ground carry out the trial assembly operation to the dummy model of product to the task of initial assembly technology generation phase, with analyze and the assemble sequence of definite each parts of product, assembly path, assembling process in interference and the operability of millwright, anchor clamps etc., and form the assembly simulation procedural information model (mainly comprising the technique informations such as clamping apparatus of using in assemble sequence, assembly path, assembling animation and the assembling process) of product; 4) task of assembly technology post-processing stages is that the assembly information that forms in the assembly simulation process is organized, merged, and replenishes and improve on this basis the assembly technology information of product, forms assembly technology document perfect, that meet factory's requirement.
Summary of the invention
The invention provides a kind of method that generates based on the assembling process of products of assembly process simulation, can realize that the information model mapping that will form in the assembly simulation process is assembling process of products.
Based on the workflow of the assembling process of products generation method of assembly process simulation as shown in Figure 1, comprise that product virtual assembly process simulation, Product Assembly simulation process information model are set up, Product Assembly simulation process information model is to mapping, subassembly dispatch and four steps of detail list output of assembling process of products model.
Step 1: product-based three-dimensional model and frock three-dimensional model, the Product Assembly process is carried out emulation, mainly comprise the use procedure emulation of parts assemble sequence and assembly path emulation, frock clamp etc.
Step 2: in the Product Assembly simulation process, by the related process information (comprising assembling sequence of product, assembly path, Assembling resource information etc.) that forms in the assembly simulation process is effectively organized, set up assembly simulation procedural information model.
Step 3: the assembly information that forms in the assembly simulation process is organized, merged, replenish and improve on this basis the assembly technology information of product, form assembling process of products model perfect, that meet factory's requirement.
Step 4: in conjunction with enterprise's real needs, from the assembling process of products model, shift to an earlier date relevant information, exportable assembly technology card and the detail list that meets factory's requirement.
Assembling process of products generation method based on assembly process simulation is a kind of assembling process planning method take assembly simulation as core, it is mainly on the basis of three-dimensional model, adopt the mode of man-machine interaction that the assembling process of product is carried out real Time Dynamic Simulation, and form initial assembling process of products by the record to the assembly simulation procedural information, by this initial assembling process of products being adapted to the modification of actual conditions, can form the assembly technique file that satisfies the enterprise practical requirement at last.The core of virtual assembly process planning technology is to be assembly technology with Product Assembly simulation process information model mapping.
Description of drawings
Fig. 1 is based on the workflow diagram of the assembling process of products generation method of assembly process simulation;
The virtual assembly process simulation process flow diagram of Fig. 2;
The assembly process simulation flow process of Fig. 3 tool using;
Fig. 4 Product Assembly simulation process information model;
Fig. 5 Product Assembly procedural information model;
Fig. 6 Product Assembly task and assembly manipulation chained list;
Fig. 7 assembling process of products model;
The combination of Fig. 8 fittage and assembly process.
Embodiment
The embodiment of each step is as follows:
(1) virtual assembly process simulation flow process
Virtual assembly process simulation, main by making up the man-machine interactive assembly process planning environment of a three-dimensional, make the assembly technology designer can be under three-dimensional environment alternatively the three-dimensional model to product carry out trial assembly, assemble sequence and assembly path with foundation and each parts of analytic product, virtual assembly process simulation flow process mainly comprises following steps as shown in Figure 2:
Step 1: the designer creates fittage.Fittage refers to that (assembly refers to the current operation object in the assembling process in order to finish one or more assemblies, it both can be subassembly, also can be part) the continuous process of debuging required enforcement, usually form by creating fittage, making-up unit and end fittage.
Step 2: select the object of fittage, the object of fittage can be a plurality of parts or parts.
Step 3: obtain the current locality information of mouse, choose the current operation object.If selected operand is identical with upper one constantly operand, execution in step 4 so.If selected operand is not identical with upper one constantly operand, finish so current assembly manipulation, and be the new assembly manipulation of selected operand establishment, and with the assembly manipulation of new establishment as the current assembly manipulation of system.
Step 4: obtain the current locality information of mouse, and foundation upper locality information calculations increment constantly, with the pose conversion increment of this increment as the current operation object.
Step 5: obtain the degree of freedom information of current operation object, according to degree of freedom information and increment information, the pose conversion that the calculating operation object is feasible.
Step 6: by calculating the pose increment, the current operation object is carried out pre-conversion, use Collision Detection to carry out collision detection.If collision does not occur, confirm so this pose conversion.If bump, make different responses according to external unit type different so.If this external unit is input equipment, such as virtual gloves, mouse etc. are cancelled this conversion so, and display reminding information.If peripheral hardware can carry out information output and feedback, calculate collision response according to collision response rule so and export and feed back by peripheral hardware.
Step 7: if the designer only operated an object, record so pose information converting and the view information of this object.If the designer operated a plurality of objects, so for each object that was operated, create corresponding parallel assembly manipulation (for each operand, all creating an assembly manipulation), and record pose information converting and view information.
Step 8: circulation execution in step 3 ~ 7, until finish assembly manipulation.
Step 9: the type of judging task.If type is the assembling parts, so task object is added in the assembling program results, and the state of task object is made as assembles; If type is to adjust parts, execution in step 10 so; If type is the dismounting parts, so task object is deleted from the assembling program results, and be made as the state of task object unassembled.
Step 10: finish fittage.
In the Product Assembly simulation process, need under many circumstances tool using or anchor clamps, it is one of the content that need to consider of assembly process planning that the usage space of clamping apparatus detects.The assembly simulation process of tool using may further comprise the steps, as shown in Figure 3:
Step 1: create fittage (comprising fittage, adjustment task and dismounting task), and specify parts as task object.
Step 2: part is moved to suitable position, if do not need moving parts, then directly carry out step 3.
Step 3: tool using, the selection tool model adds it in current task to.
Step 4: Move tool if do not need Move tool, then directly carry out step 5 to suitable pose.
Step 5: instrument and part are positioned, and part will move under the constraint of instrument after the location, and namely the process synchronizing moving part of operation tool carries out collision detection of high precision and contact condition modeling in this process.
Step 6: Assembly of the parts behind the target location, releasing tool.
Step 7: instrument is put back to worktable.
Step 8: finish current task.
(2) assembly simulation procedural information model is set up
In assembly simulation process shown in Figure 2, by the related process information (comprising assembling sequence of product, assembly path, Assembling resource information etc.) that forms in the assembly simulation process is effectively organized, set up assembly simulation procedural information model.
Assembly simulation procedural information model is comprised of fittage and assembly manipulation.Fittage refers to that (assembly refers to the current operation object in the assembling process in order to finish one or more assemblies, it both can be subassembly, also can be part) assembling and the continuous process of adjusting required enforcement, usually form by creating fittage, making-up unit and end fittage.Fittage is divided into making-up unit, adjusts assembly and three kinds of task types of disconnect assembly.The making-up unit task refers to knocked-down assembly is assembled to form the process of final assembly.Adjusting the assembly task refers to the assembly that has assembled is carried out the process that pose is adjusted.The disconnect assembly task is the process that the assembly that has assembled is dismantled, and this assembly does not belong to final assembly after the dismounting.Each fittage has one group of task object of determining, and task object is to finish the required assembly of this fittage.
A fittage is comprised of a series of orderly assembly manipulations.Assembly manipulation refers to the continued operation process of one or more operands enforcements is comprised of pick-up operation object, assembly manipulation object and releasing operation object usually.The object of assembly manipulation refers to all exercisable entities of assembling process, comprises parts, part, instrument, anchor clamps etc.This object must be the instrument that uses in the task object of fittage under it or the fittage and anchor clamps etc.In a fittage, when the designer was switched the assembly manipulation object, system can create a new assembly manipulation automatically.When simultaneously a plurality of parts being carried out assembly manipulation, when perhaps simultaneously assembly and clamping apparatus being carried out assembly manipulation, the assembly manipulation that system is can be automatically parallel to each assembly manipulation Object Creation.When for example simultaneously part A and part B being carried out assembly manipulation, system can automatically for part A and part B, create two assembly manipulations (two assembly manipulations walk abreast in time series).
Based on fittage and assembly manipulation, set up a Product Assembly simulation process information model, as shown in Figure 4.In this model, the assembling process of product is divided into fittage-assembly manipulation-three levels of status data, the assembling process of product is comprised of a series of fittages, each fittage is comprised of a series of assembly manipulations, has comprised a series of orderly status data that assembly experiences in assembling process (comprising the position in space and attitude, speed, acceleration etc.) in the assembly manipulation.
The assembling process of product normally from the Assembly of the parts of bottom becomes parts, enters general assembly after several component assembles are finished.For the assembling process to parts is carried out modeling, the son assembling is incorporated in the assembling process model.Son assembling is the assembling process for the relatively independent parts of representation function and structure.The son assembling comprises a series of orderly fittages, can nested son assembling in the son assembling.Based on above-mentioned Product Assembly simulation process information model, one comprises the sub complete assembling process information model of product that assembles as shown in Figure 5.In carrying out assembling process, first parts that are assembled are the matrix of whole product by Lookup protocol, and the parts of follow-up assembling are joined at the enterprising luggage of this matrix.
Therefore, the assembling process of a product is described by a series of fittages.Each fittage is assembled one or more parts, when a fittage is finished, this task is added in the historical chained list of the corresponding fittage of product, and the assemble sequence of the parts that it assembles has been reflected in the priority position of fittage in the historical chained list of assembling.On the other hand, each fittage is realized that by a series of assembly manipulation assembly manipulation is described the complete process of this task in detail.Each assembly manipulation has one or more operands, and these operands are at the effect down conversion pose of peripheral input message, and finally finishes assembling.Each assembly manipulation comprise this operation operand a series of paths points (Node Path, NP) of process and operand at status datas such as the external force of this path point, contact force, speed, acceleration.The sample frequency of system has determined the fine degree of the status data that obtains, and the frequency of sampling during the recording status data is higher, and the data that obtain are just meticulousr.Fig. 6 is the fittage chained list that a plurality of parts of a tool using assemble simultaneously, and AT represents fittage, and AO represents assembly manipulation.Wherein fittage 2 has realized the assembling of part 2, part 3, and wherein assembly manipulation 2 and assembly manipulation 3 are parallel.
(3) Product Assembly simulation process information model is to the mapping of assembling process of products model
After assembly simulation procedural information model is set up, the whole assembling process information of product is realized by a fittage sequence, this fittage sequence Direct function description the implementation relation between product and the fittage, namely by finishing those fittages, can finally finish the assembling of this product, and describe the sequencing of these fittages.And the assembly technology of product is comprised of a series of assembly process, and assembly process is made of a series of assembling work step again, needs therefore to realize that Product Assembly simulation process information model is to the mapping of assembly technology.
Product Assembly simulation process information model mapping is assembly process model, can realize by the mode of man-machine interaction, and foundation assembling process of products model as shown in Figure 7, wherein assembling process of products is comprised of a series of assembly process, one assembly process is comprised of one or more assembling work steps, an assembling work step is comprised of one or more corresponding fittage, and a fittage is comprised of one or more corresponding assembly manipulation.
Realize Product Assembly simulation process information model to the mapping of assembling process of products model by man-machine interaction mode, only need corresponding fittage added to according to the assembly technology of reality getting final product below the corresponding assembling work step, shown in 8.
Carrying out fittage when related with assembly process, adopting the ID of fittage to traverse all fittages, then the fittage that finds is being added in the chained list of assembling work step.
Step 1: the definition interfaces of design assembling process operation and work step.In the definition interfaces of assembling process operation and work step, in operation title and operation code name, can input operation title (character) and operation number (numeral is such as 2), to click and add the operation button, title and code name are refreshed in the artistic tree and show.In work step title and work step code name, can input work step title (character) and work step number (numeral is such as 2.1), and in work step content the inside, can input the various information of this assembling activity, comprise checking information, kitting requirement also has matching requirements etc.Click and add the work step button, work step title and code name are refreshed in the artistic tree, add to below the corresponding operation, and show.If mistake appears in the user in definition procedure, can by " deletion " button of below, with operation or the work step deletion of mistake, then proceed to add.
Step 2: design fittage and the related interface of assembling work step.In this interface, click Refresh button, all fittages are shown.Click fittage and make it highlighted, by clicking " association " button, it is associated with below the corresponding assembling work step, parts can be presented at according to the hierarchical structure of assembling in the artistic tree of below.After all parts associations are finished, the assembling process of products of generation model can be arranged.
(4) subassembly dispatch and detail list output
After having finished the foundation of assembling process of products model, can from the assembling process of products model, extract relevant information, output products subassembly dispatch, technological equipment detail list, material consumption detail list and kitting detail list.
Claims (5)
1. a method that generates based on the assembling process of products of assembly process simulation is characterized in that, comprises following four steps,
The first step, product-based three-dimensional model and frock three-dimensional model carry out emulation to the Product Assembly process; Second step, by the technique information to forming in the assembly simulation process, comprise that assemble sequence, assembly path, Assembling resource information effectively organizes, set up assembly simulation procedural information model; The 3rd goes on foot, the assembly information that forms in the assembly simulation process is organized, merged, and replenishes and improve the assembly technology information of product, forms the assembling process of products model; The 4th goes on foot, shifts to an earlier date relevant information, output assembly technology card and detail list from the assembling process of products model.
2. the method that generates based on the assembling process of products of assembly process simulation as claimed in claim 1 is characterized in that the concrete steps of the first step are
Step 1: the designer creates fittage;
Step 2: the object of selecting fittage;
Step 3: obtain the current locality information of mouse, choose the current operation object, continue execution in step 4 or finish current operation;
Step 4: obtain the current locality information of mouse, and foundation upper locality information calculations increment constantly, with the pose conversion increment of this increment as the current operation object;
Step 5: obtain the degree of freedom information of current operation object, according to degree of freedom information and increment information, the pose conversion that the calculating operation object is feasible;
Step 6: by calculating the pose increment, the current operation object is carried out pre-conversion, use Collision Detection to carry out collision detection;
Step 7: record the pose information converting of this object and view information or for each object that was operated, create corresponding parallel assembly manipulation, and record pose information converting and view information;
Step 8: circulation execution in step 3 ~ 7, until finish assembly manipulation;
Step 9: the type of judging task;
Step 10: finish fittage.
3. the method that generates of the assembling process of products based on assembly process simulation as claimed in claim 1, it is characterized in that, the mode of the 3rd step by man-machine interaction realizes, adopt the ID of fittage to traverse all fittages, then the fittage that finds is added in the chained list of assembling work step.
4. the method that generates of the assembling process of products based on assembly process simulation as claimed in claim 1, it is characterized in that, in the assembling process of products model of the 3rd step formation, the assembling process of product is divided into fittage, assembly manipulation, three levels of status data, the assembling process of product is comprised of a series of fittages, each fittage is comprised of a series of assembly manipulations, has comprised a series of orderly status data that assembly experiences in assembling process in the assembly manipulation.
5. the method that generates of the assembling process of products based on assembly process simulation as claimed in claim 4 is characterized in that, status data comprises the position in space and attitude, speed, acceleration.
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Inventor after: Bai Shuqing Inventor after: Liu Jianhua Inventor after: Cai Yanli Inventor after: Yang Zhimeng Inventor after: Yang Minghui Inventor before: Bai Shuqing Inventor before: Liu Jianhua Inventor before: Cai Yanli Inventor before: Yang Zhimeng |
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| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: BAI SHUQING LIU JIANHUA CAI YANLI YANG ZHIMENG TO: BAI SHUQING LIU JIANHUACAI YANLI YANG ZHIMENG YANG MINGHUI |
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Application publication date: 20130313 |