Articles de revues : « Assembly planning system »

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Müller, Rainer, Matthias Vette, Leenhard Hörauf et Christoph Speicher. « Identification of Assembly System Configuration for Cyber-Physical Assembly System Planning ». Applied Mechanics and Materials 840 (juin 2016) : 24–32. http://dx.doi.org/10.4028/www.scientific.net/amm.840.24.

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To respond to challenges created by an increase of product variants, multi-variant lines are used as today’s assembly systems. In these multi-variant lines different product variants with diverse lot sizes can be efficiently assembled. These assembly systems are characterized by modular structures that allow assembly system adaptation by reconfiguration.The variety of parameters to be considered from the product’s perspective and the correct allocation of different assembly modules increases the complexity when planning these systems. This complexity makes it difficult to successfully plan and implement production processes. Therefore, digital planning tools and models have to be used to schedule new product variants and to verify that the assembly is possible, given by the modules in the assembly line.Due to its ability to reconfigure, the actual assembly system is adaptable to different product variants. But these modifications are performed by the operator on the shop floor and are often neither properly documented nor communicated to the assembly planer. Thus, the configuration status in reality and the virtual model differ from each other. Using the outdated model for planning without taking into account the changes can result in an unrealizable assembly plan.To overcome this problem, the presented paper introduces a method and technical system to identify the actual assembly system configuration before the assembly planning is done. Due to the subsequent update of the virtual model depending on the actual configuration, the assembly planner is supported with the latest version of the assembly system configuration. Furthermore, the assembly planning process is improved, because possible failures are detected in advance in the virtual planning environment.

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Chen, C. L. Philip, et C. A. Wichman. « A systematic approach for design and planning of mechanical assemblies ». Artificial Intelligence for Engineering Design, Analysis and Manufacturing 7, n^o 1 (février 1993) : 19–36. http://dx.doi.org/10.1017/s0890060400000044.

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A system that integrates design and planning for mechanical assemblies is presented. The system integrates neural network computing that captures designer's design concept and rule-based system to generate a task-level assembly plan automatically. The design concept is expressed by a standard pattern format representing qualitative assembly information. A neural network model together with feature-based model translates the input pattern into a preliminary boundary representation (B-rep). Based on a refinement B-rep assembly representation, assembly plans are generated for practical use in a single-robot assembly workcell. A feasible assembly plan that minimizes tool changes and subassembly reorientations is generated from the system. A robust part collision detection algorithm to generate the precedence relationships among the assembly's components is included in the system. By contrast with many assembly planning systems that used a prolonged question-and-answering session or required knowledge beyond what is typically available in the design database, an automated assembly planning system presented here draws input relationships directly from the conceptual design and the geometry of the assembly. The system developed under this study extracts all reasoning information from the product model and permits the components to be assembled in a multitude of directions. Several experiments illustrate the effectiveness of the designed assembly planning system.

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Zorc, Samo, Tomaž Perme et Dragica Noe. « Assembly planning system for an intelligent assembly cell ». IFAC Proceedings Volumes 32, n^o 2 (juillet 1999) : 85–90. http://dx.doi.org/10.1016/s1474-6670(17)56017-6.

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Burggräf, P., M. Dannapfel, T. Adlon, A. Riegauf, K. Müller et C. Fölling. « Agile Montage*/Agile assembly – Assembly planning and assembly system as integral elements of factory planning ». wt Werkstattstechnik online 109, n^o 09 (2019) : 622–27. http://dx.doi.org/10.37544/1436-4980-2019-09-8.

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Produzierende Unternehmen intensivieren aufgrund zunehmend volatiler Kundenbedürfnisse die Anwendung agiler Produktentwicklungsansätze. Ziel des Beitrags ist die Einführung eines Konzepts zur Befähigung dieser dynamischen Produktentwicklung in der Montage. Der integrative Lösungsansatz basiert auf der wirtschaftlichen Optimierung des Agilitätsgrades von Montagesystemen sowie dem selektiven Einsatz agiler Methoden in der traditionell plangetriebenen Montageplanung als Teil der Fabrikplanung.   To meet more volatile customer needs, manufacturing companies increasingly make use of agile product development approaches. This article aims to introduce a concept to enable for dynamic product development in assembly. This integrative solution approach is based on the economic optimization of the degree of agility of assembly systems and on the selective use of agile methods in traditional, plan-driven assembly planning as part of factory planning.

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Liu, Jianhua. « Integrated Virtual Assembly Process Planning System ». Chinese Journal of Mechanical Engineering 22, n^o 05 (2009) : 717. http://dx.doi.org/10.3901/cjme.2009.05.717.

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Bikas, Charisis, Angelos Argyrou, George Pintzos, Christos Giannoulis, Kostantinos Sipsas, Nikolaos Papakostas et George Chryssolouris. « An Automated Assembly Process Planning System ». Procedia CIRP 44 (2016) : 222–27. http://dx.doi.org/10.1016/j.procir.2016.02.085.

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Wang, Wurong, Guanlong Chen, Zhonqin Lin et Xinmin Lai. « Automated Hierarchical Assembly System Construction in Automobile Body Assembly Planning ». Journal of Mechanical Design 127, n^o 2 (1 mars 2005) : 347–51. http://dx.doi.org/10.1115/1.1829724.

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DFA (design for assembly) is an approach to designing products with ease of assembly in mind. Multilayer assembly system construction and possible assembly sequencing are important information for DFA, especially at the prototype design stage of an automobile. This paper aims to help automobile designers construct a hierarchical assembly system, develop a systematic approach to automated subassembly detection, and assembly sequencing in automobile body assembly planning. Modeling of an automobile assembly is given, based on precedence knowledge among automobile parts. Algorithms to detect possible subassemblies with two-step verification and to generate all available sequences are also developed in this study.

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Bozhko, A. N. « Structural Analysis of Product and Computer-Aided Assembly Planning in AssemBL Software Package ». Mechanical Engineering and Computer Science, n^o 8 (22 octobre 2018) : 11–33. http://dx.doi.org/10.24108/0818.0001424.

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Computer-aided design of assembly processes (Computer aided assembly planning, CAAP) of complex products is an important and urgent problem of state-of-the-art information technologies. Intensive research on CAAP has been underway since the 1980s. Meanwhile, specialized design systems were created to provide synthesis of assembly plans and product decompositions into assembly units. Such systems as ASPE, RAPID, XAP / 1, FLAPS, Archimedes, PRELEIDES, HAP, etc. can be given, as an example. These experimental developments did not get widespread use in industry, since they are based on the models of products with limited adequacy and require an expert’s active involvement in preparing initial information. The design tools for the state-of-the-art full-featured CAD/CAM systems (Siemens NX, Dassault CATIA and PTC Creo Elements / Pro), which are designed to provide CAAP, mainly take into account the geometric constraints that the design imposes on design solutions. These systems often synthesize technologically incorrect assembly sequences in which known technological heuristics are violated, for example orderliness in accuracy, consistency with the system of dimension chains, etc.An AssemBL software application package has been developed for a structured analysis of products and a synthesis of assembly plans and decompositions. The AssemBL uses a hyper-graph model of a product that correctly describes coherent and sequential assembly operations and processes. In terms of the hyper-graph model, an assembly operation is described as shrinkage of edge, an assembly plan is a sequence of shrinkages that converts a hyper-graph into the point, and a decomposition of product into assembly units is a hyper-graph partition into sub-graphs.The AssemBL solves the problem of minimizing the number of direct checks for geometric solvability when assembling complex products. This task is posed as a plus-sum two-person game of bicoloured brushing of an ordered set. In the paradigm of this model, the brushing operation is to check a certain structured fragment for solvability by collision detection methods. A rational brushing strategy minimizes the number of such checks.The package is integrated into the Siemens NX 10.0 computer-aided design system. This solution allowed us to combine specialized AssemBL tools with a developed toolkit of one of the most powerful and popular integrated CAD/CAM /CAE systems.

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Sunil, V. B., et S. S. Pande. « WebROBOT : Internet based robotic assembly planning system ». Computers in Industry 54, n^o 2 (juin 2004) : 191–207. http://dx.doi.org/10.1016/j.compind.2003.07.008.

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Köhne, Axel. « Integration of Action Planning and Configuration in Assembly System Planning ». IFAC Proceedings Volumes 25, n^o 28 (octobre 1992) : 276–80. http://dx.doi.org/10.1016/s1474-6670(17)49509-7.

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Zhang, Dan, Guang Ming Jiao, Dun Wen Zuo, Jian Xie, J. P. Li et Hua Lin Zhou. « Study on Desktop Virtual Assembly System for Interactive Assembly Process Planning ». Key Engineering Materials 426-427 (janvier 2010) : 371–75. http://dx.doi.org/10.4028/www.scientific.net/kem.426-427.371.

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Aiming at the shortcomings of traditional assembly process design and immersive virtual assembly system, the architecture of Desktop Virtual Assembly System (DVAS) for interactive assembly process planning is presented. The key technologies such as data conversion and reconstruction of assembly models, assembly intention recognition and assembly control navigation are studied. The lightweight storage of assembly models’ data and the intelligent constraints recognition are realized. The problem of assembly operations resulted from the lack of immersion is solved by movement navigation. The algorithms were proposed and applied to the DVAS prototype, and an application case is studied to demonstrate the effectiveness of the system.

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Miura, Jun, et Katsushi Ikeuchi. « Task Planning of Assembly of Flexible Objects and Vision-Based Verification ». Robotica 16, n^o 3 (mai 1998) : 297–307. http://dx.doi.org/10.1017/s026357479800037x.

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The ability of manipulating flexible objects, such as rubber belts and paper sheets, is important in automated manufacturing systems. This paper describes a novel approach to vision-guided assembly of flexible objects. The operation dealt with in this paper is to assemble a rubber belt with fixed pulleys. By analyzing possible states of the belt based on the empirical knowledge of the belt, we can derive a method to have not only the action planning but also the visual verification planning. We have implemented a belt assembly system using the two manipulators and a laser range finder as the sensor, and succeeded in performing the belt-pulley assembly. The extension of our approach to other kinds of assembly of flexible objects is also discussed.

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Ying, Kuo-Ching, Pourya Pourhejazy, Chen-Yang Cheng et Chi-Hsin Wang. « Cyber-physical assembly system-based optimization for robotic assembly sequence planning ». Journal of Manufacturing Systems 58 (janvier 2021) : 452–66. http://dx.doi.org/10.1016/j.jmsy.2021.01.004.

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Liu, Xiaojun, Xiaokang Xu, Yang Yi, Zhonghua Ni et Yang Zhang. « An assembling algorithm for fixture in an assembly process planning system ». Proceedings of the Institution of Mechanical Engineers, Part B : Journal of Engineering Manufacture 234, n^o 8 (10 mars 2020) : 1133–55. http://dx.doi.org/10.1177/0954405420904848.

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Three-dimensional assembly process planning is a precondition for achieving full product lifecycle management based on three-dimensional modelling. Information expression and management operations of fixture models are key to three-dimensional assembly process planning systems. To reasonably and efficiently achieve the goal of planning assembly processes with a fixture model, the application of a fixture information model to a three-dimensional assembly process planning system is investigated. First, to manage tooling information, a fixture information model is defined that consists of management information, display information, geometric information, assembly constraints and degrees of freedom. Then, based on the analysis of the degrees of freedom of components and the assembly constraint relationship, a method of solving assembly constraints based on degrees of freedom reasoning is proposed. Finally, by using the method of solving assembly positioning based on geometric constraints, the pose transformation and assembly positioning of parts are achieved. Through the development of a tooling function module, the three-dimensional assembly process planning system is improved. The feasibility of the above method is verified using part of a spacecraft as an example.

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Chen, Peng, Ping Jun Xia, Yue Dong Lang et Ying Xue Yao. « A Human-Centered Virtual Assembly System ». Applied Mechanics and Materials 16-19 (octobre 2009) : 796–800. http://dx.doi.org/10.4028/www.scientific.net/amm.16-19.796.

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Virtual manufacturing technology has become an effective method for decision and planning in manufacturing. Due to ergonomics problems are widely concerned in assembly design planning, a human-centered virtual assembly system framework is proposed for ergonomics analysis for assembly operation in this paper. The six-layer framework integrates virtual human modeling, motion capture and recognition, ergonomics evaluation and virtual assembly process planning as an organic whole. Data exchanging and system function are discussed based on this framework. The work in virtual reality (VR) technology, motion capture technology, ergonomics method and optimization method for implementing the system is also described. The framework would provide a new approach for the combination of virtual manufacturing and ergonomics analysis in the future.

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ALFADHLANI, T. M. A. ARI SAMADHI, ANAS MA'RUF et ISA SETIASYAH TOHA. « AUTOMATIC COLLISION DETECTION FOR ASSEMBLY SEQUENCE PLANNING USING A THREE-DIMENSIONAL SOLID MODEL ». Journal of Advanced Manufacturing Systems 10, n^o 02 (décembre 2011) : 277–91. http://dx.doi.org/10.1142/s021968671100220x.

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Assembly sequence planning of a product involves several steps, including generation of precedence constraints, generation of assembly sequences, and selection of assembly sequences. Generation and selection of assembly sequences should be able to guarantee the feasibility of assembly. Assembly will be feasible if there is no collision between components when assembled. Detection of collision-free path of assembly can be done in an automated way. There are a number of collision detection methods that have been developed, but the method requires a complicated process of data geometry analysis. This paper proposes a method for detecting a collision-free path of the assembly component in a more simple way. Geometrical data required, taken from the three-dimensional (3D) solid drawing in the form of stacked drawing in computer-aided design (CAD) systems. Retrieval of geometrical data of components and detection of the collision-free path of an assembly were done in an automated way, directly from the CAD system.

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Sun, Hongyan. « Development of a Robot Assembly Task Planning System ». IFAC Proceedings Volumes 31, n^o 7 (mai 1998) : 23–28. http://dx.doi.org/10.1016/s1474-6670(17)40251-5.

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Tönshoff, H. K., E. Menzel et H. S. Park. « A Knowledge-Based System for Automated Assembly Planning ». CIRP Annals 41, n^o 1 (1992) : 19–24. http://dx.doi.org/10.1016/s0007-8506(07)61143-3.

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Kong, Sang Hoon, Sang Do Noh, Young-Geun Han, Gibom Kim et Kyo Il Lee. « An agent-based collaborative assembly process planning system ». International Journal of Advanced Manufacturing Technology 28, n^o 1-2 (13 avril 2005) : 176–83. http://dx.doi.org/10.1007/s00170-004-2347-5.

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Zhao, J., et S. Masood. « An Intelligent Computer-Aided Assembly Process Planning System ». International Journal of Advanced Manufacturing Technology 15, n^o 5 (18 mai 1999) : 332–37. http://dx.doi.org/10.1007/s001700050075.

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Arai, Eiji, et Kazuaki Iwata. « CAD system with product assembly/disassembly planning function ». Robotics and Computer-Integrated Manufacturing 10, n^o 1-2 (janvier 1993) : 41–48. http://dx.doi.org/10.1016/0736-5845(93)90024-e.

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Lin, Alan C., et Tien-Chien Chang. « 3D MAPS : Three-dimensional mechanical assembly planning system ». Journal of Manufacturing Systems 12, n^o 6 (janvier 1993) : 437–56. http://dx.doi.org/10.1016/0278-6125(93)90342-q.

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Choudhury, B. B., et Bibhuti Bhusan Biswal. « Integrated Multi-Robotic Assembly Planning for Improved Productivity ». Advanced Materials Research 383-390 (novembre 2011) : 6357–62. http://dx.doi.org/10.4028/www.scientific.net/amr.383-390.6357.

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In product assembly, optimized sequence is a prerequisite for automated systems. The assembly process can be optimized through appropriate selection and allocation of the given tasks in a multi-device framework. These two discrete tasks need to be integrated to produce the optimum result and a cost effective system to cope with the needs of the system, the present work attempts to generate an automatic assembly sequence and seeks for optimal allocation of tasks amongst the available robots. Further, an effective task allocation approach considers the capabilities of the deployable robots. This paper presents an integrated approach for assembly sequence generation and task allocation for multi-robot systems by considering their capability in terms of time and space. An example of a 21 part drive assembly is given to illustrate the concept and procedure of the proposed methodology.

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Chen, Lei, Ming Ran Deng et Zheng Feng Jiang. « Study on Visual Assembly Process Planning System Based on 3DVIA Composer ». Advanced Materials Research 179-180 (janvier 2011) : 734–39. http://dx.doi.org/10.4028/www.scientific.net/amr.179-180.734.

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Errors often occur in the assembling process because traditional two-dimensional process cards are lack of three-dimensional realistic in assembling site. Aimed at this problem, a visual assembly process planning system is proposed, which turns assembly process into assembly animation on the basis of three-dimensional model on the platform of 3DVIA Composer. This System combines assembly process planning with assembly simulation, and then realizes the assembly process related to three-dimensional process model and assembly animation and assembly process visualization in assembling site by the application programming interface provided by 3DVIA Composer. The system has been applied to some aircraft parts manufacturing enterprise, and then obviously shortens assembling time and guarantees assembling quality.

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Gallegos-Nieto, Enrique, Hugo I. Medellin-Castillo, Yan Xiu-Tian et Jonathan Corney. « Haptic-enabled virtual planning and assessment of product assembly ». Assembly Automation 40, n^o 4 (9 mai 2020) : 641–54. http://dx.doi.org/10.1108/aa-10-2019-0169.

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Purpose This study aims to present a new haptic-enabled virtual assembly system for the automatic generation and objective assessment of assembly plans. The system is intended to be used as an assembly planning tool along the product development process. Design/methodology/approach The generation of product assembly plans is based on the analysis of the assembly movements and operations performed by the user during the virtual assembly execution, and the objective assessment of product assembly is based on the definition and computation of new proposed assembly metrics. Findings To evaluate the system, a case study corresponding to the assembly of a mechanical component is presented and analyzed. The results demonstrate that the proposed system is an effective tool to plan and evaluate different product assembly strategies in a more practical and objective approach than existing assembly planning methods. Research limitations/implications Although the virtual assembly execution time is larger than the real assembly execution time, the assembly planning and evaluation results provided by the system are valid. However, the development of higher performance collision detection algorithms is needed to reduce the simulation time. Originality/value The proposed virtual assembly system is able to not only simulate and automatically generate assembly plans but also objectively assess them from the virtual assembly task execution. The introduction and use of several assembly performance metrics to objectively evaluate assembly strategies in virtual assembly also represents a novel contribution.

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Özmen, Özkan, Turgay Batbat, Tolgan Özen, Cem Sinanoğlu et Ayşegül Güven. « Optimum Assembly Sequence Planning System Using Discrete Artificial Bee Colony Algorithm ». Mathematical Problems in Engineering 2018 (2018) : 1–14. http://dx.doi.org/10.1155/2018/3407646.

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Assembly refers both to the process of combining parts to create a structure and to the product resulting therefrom. The complexity of this process increases with the number of pieces in the assembly. This paper presents the assembly planning system design (APSD) program, a computer program developed based on a matrix-based approach and the discrete artificial bee colony (DABC) algorithm, which determines the optimum assembly sequence among numerous feasible assembly sequences (FAS). Specifically, the assembly sequences of three-dimensional (3D) parts prepared in the computer-aided design (CAD) software AutoCAD are first coded using the matrix-based methodology and the resulting FAS are assessed and the optimum assembly sequence is selected according to the assembly time optimisation criterion using DABC. The results of comparison of the performance of the proposed method with other methods proposed in the literature verify its superiority in finding the sequence with the lowest overall time. Further, examination of the results of application of APSD to assemblies consisting of parts in different numbers and shapes shows that it can select the optimum sequence from among hundreds of FAS.

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Murayama, Takeshi, Yuichi Mine, Hiroshi Fujinaka et Toru Eguchi. « Assembly Sequence Planning by Probabilistic Tree Transformation ». EMITTER International Journal of Engineering Technology 6, n^o 2 (29 décembre 2018) : 354–68. http://dx.doi.org/10.24003/emitter.v6i2.308.

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Various types of computer systems including CAD/CAM systems have been introduced in machine industry. Some of the systems can handle assembly sequence planning, however it requires long time for planning. This paper proposes a method of generating assembly sequences efficiently. This method extracts some parts and/or subassemblies whose possibilities of being removed from a product are strong, and tests whether they can be removed without any geometric interference. By performing these operations repeatedly, the method generates a disassembly sequence of the product, and obtains an assembly sequence by reversing it. The extraction of some parts and/or subassemblies is performed, based on probabilistic tree transformation. The authors present a calculation example by using a software tool integrated with a CAD system.

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Gao, Qing Feng, Li Long Shang et Li Xuan Zhang. « An Efficient Method of Assembly Path Planning in Virtual Manufacturing System ». Advanced Materials Research 468-471 (février 2012) : 550–58. http://dx.doi.org/10.4028/www.scientific.net/amr.468-471.550.

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With the development of information technology, such as CAD, CAPP and CAM, assembly process, which accounts for large amount of time and cost of manufacturing, to be included in virtual manufacturing system is urgently required. According to the principle that the sequence and path in assembly and disassembly process are reversible, the assembly path can be obtained on the basis of assembly constraints analysis and information model building through optimized and reversed. The method of assembly path planning presented in this paper can effectively reduce computational complexity and improve planning efficiency, whose correctness and efficiency is proven by an application example.

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Mao, En Hui, Wen Hua Zhu, Benoit Eynard et Matthieu Bricogne. « Studies on Techniques of Integrated House Assembly Simulation ». Advanced Materials Research 1039 (octobre 2014) : 462–68. http://dx.doi.org/10.4028/www.scientific.net/amr.1039.462.

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This thesis introduces integrated house assembly simulation platform technology. It is divided into three categories: assembly simulation for the center with product design, assembly simulation for the center with assembly planning and assembly simulation for the center with virtual prototype. According to the characteristics of the integrated house assembly and modeling, it puts forward level assembly analysis method and studies the assembly system planning, assembly sequence planning and assembly path planning simulation technology. The results show that through the production system and assembly operation simulation technology research, it improves the rationality of the integrated house assembly process planning.

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Chang, Qing, Jun Ni, Pulak Bandyopadhyay, Stephan Biller et Guoxian Xiao. « Maintenance Opportunity Planning System ». Journal of Manufacturing Science and Engineering 129, n^o 3 (7 février 2007) : 661–68. http://dx.doi.org/10.1115/1.2716713.

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Timely performance of preventive maintenance (PM) tasks is a critical element of manufacturing systems. Since the majority of PM tasks requires that equipment be stopped, these tasks can generally only be performed during nonproduction shifts, breaks, or other scheduled downtime. Thus, there is a trade-off between time dedicated to production and time available for preventive maintenance. One approach to mitigate this trade-off is to perform maintenance during scheduled production time by strategically shutting down equipment for short time periods. This research developed a systematic method on when to shut down equipment to do maintenance in an automotive assembly environment. It is called maintenance opportunity. The method incorporated real-time information about production and machine failure conditions. A simulation-based algorithm is developed by utilizing the buffer contents as well as machine starvation and congestion to obtain maintenance opportunities during production time.

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Ali, Ahmad, et Ji Yeong Lee. « Integrated Motion Planning for Assembly Task with Part Manipulation Using Re-Grasping ». Applied Sciences 10, n^o 3 (21 janvier 2020) : 749. http://dx.doi.org/10.3390/app10030749.

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This paper presents an integrated planner based on rapidly exploring random tree (RRT) for an assembly task with possible re-grasping. Given multiple grasp poses for the part to assemble, the planner chooses candidate grasp poses considering the environment (including the partially finished assembly) in addition to the initial and final poses of the part. Orientation graph search based re-grasping approach is proposed for part manipulation which is needed when there is no feasible grasp solution for a part between its initial and final poses. Orientation graph search helps finding a series of the intermediate poses of the part needed between its initial and final poses so that robot can grasp and assemble it without interfering the pre-assembled parts. Then while extending the tree, the algorithm tries to connect the tree to a robot configuration with a chosen candidate grasp pose. Also, since the task space undergoes changes at each step of the assembly task, a node or edge in the tree can become in collision during the assembly of later parts, making the node in collision and its descendant nodes disconnected from the whole tree. To handle this, Two stage extended RRT strategy is proposed. The disconnected parts of the main tree are put into forest, and attempts are made to re-connect the tree in the forest to main tree while extending the main tree, thus making it possible to use the disconnected part again. The algorithm is implemented in Linux based system using C++. The proposed algorithm is demonstrated experimentally using UR5e robot manipulator by assembling the soma puzzle pieces in different 3D formations.

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Kroll, Ehud, Ehud Lenz et John R. Wolberg. « Rule-based generation of exploded-views and assembly sequences ». Artificial Intelligence for Engineering Design, Analysis and Manufacturing 3, n^o 3 (août 1989) : 143–55. http://dx.doi.org/10.1017/s0890060400001190.

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AbstractDirect planning of assembly sequences is either very complicated computationally, or requires an ‘expert’ user. This paper presents a new approach to the automatic generation of assembly plans which involves two phases. An ‘exploded’ layout of the assembled product is first found from its topological and geometric description by a graph-based procedure. Then, a knowledge-based technique is used for planning of selected assembly sequences by utilizing theoretical as well as heuristic knowledge of mechanical components and assembly processes. Besides serving the assembly planning phase, automatic generation of exploded-views could also be a most desirable feature of any computer-aided design system. An example demonstrates the application of the method to an actual product.

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Zhang, Qi, Hong Fei Zhao, Hai Tao Wang et Xiao Fa Diao. « Design of Virtual Assembly Sequence Planning System Based on Double Bases Cooperation Mechanism ». Applied Mechanics and Materials 422 (septembre 2013) : 159–64. http://dx.doi.org/10.4028/www.scientific.net/amm.422.159.

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Currently, the result of automatic assembly sequence planning shows bad practicality of engineering, and the assembly experience is not being fully utilized. For solving the problem, this paper introduces the double bases cooperating mechanism to aid the planning of the assembly process. By standardizing characteristic attribute of parts, the expert knowledge base that based on semantics is established. The expert knowledge base will assist the process of automatic assembly sequence planning. Desktop virtual reality technology is utilized for simulating the process of assembly operations. The status information of operations is fed back to the database for mining and learning, thus this progressive reasoning sequence meets the requirements of engineering, the final result of planning is stored into the database as an index case, it can provides a reference for subsequent similar assembly. Finally, the effectiveness of the method is verified by the example.

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Röhrdanz, F., H. Mosemann et F. M. Wahl. « HighLAP : A High Level System for Generating, Representing, and Evaluating Assembly Sequences ». International Journal on Artificial Intelligence Tools 06, n^o 02 (juin 1997) : 149–63. http://dx.doi.org/10.1142/s0218213097000086.

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In this paper we present our high level assembly planning system HighLAP·HighLAP generates and evaluates all assembly sequences of a mechanical assembly with minimal user interaction. For the evaluation of all feasible assembly sequences several criteria are taken into account. HighLAP considers for example the separability and the manipulability of the generated (sub)assemblies. Furthermore, the necessity of reorientation for a mating operation and parallelism during plan execution is considered. Another important criterion is the stability of the generated (sub)assemblies. Most of the assembly planners developed up to date use heuristics or user defined criteria to determine assembly stability for plan evaluation. In order to bring automatic assembly planning closer to reality HighLAP performs a powerful geometrical and physical reasoning. The presented system is the first assembly planning system taking into account the range of all stable orientations of an assembly considering friction for plan evaluation.

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Tohidi, Hossein, et Tarek AlGeddawy. « Planning of Modular Fixtures in a Robotic Assembly System ». Procedia CIRP 41 (2016) : 252–57. http://dx.doi.org/10.1016/j.procir.2015.12.090.

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Kern, Wolfgang, Fabian Rusitschka et Thomas Bauernhansl. « Planning of Workstations in a Modular Automotive Assembly System ». Procedia CIRP 57 (2016) : 327–32. http://dx.doi.org/10.1016/j.procir.2016.11.057.

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Eversheim, W., P. Kettner et K. P. Merz. « Planning a Highly Mechanized Assembly System for Product Variants ». CIRP Annals 34, n^o 1 (1985) : 9–12. http://dx.doi.org/10.1016/s0007-8506(07)61711-9.

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Tran, Phong, et Simmy Grewal. « A data model for an assembly planning software system ». Computer Integrated Manufacturing Systems 10, n^o 4 (octobre 1997) : 267–75. http://dx.doi.org/10.1016/s0951-5240(97)00019-0.

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Xu, Li Da, Chengen Wang, Zhuming Bi et Jiapeng Yu. « AutoAssem : An Automated Assembly Planning System for Complex Products ». IEEE Transactions on Industrial Informatics 8, n^o 3 (août 2012) : 669–78. http://dx.doi.org/10.1109/tii.2012.2188901.

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Hsu, Yung-Yuan, Pei-Hao Tai, Min-Wen Wang et Wen-Chin Chen. « A knowledge-based engineering system for assembly sequence planning ». International Journal of Advanced Manufacturing Technology 55, n^o 5-8 (30 décembre 2010) : 763–82. http://dx.doi.org/10.1007/s00170-010-3093-5.

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Sanii, Ezat T., et Jong-Shin Liau. « An expert process planning system for electronics PCB assembly ». Computers & ; Electrical Engineering 19, n^o 2 (mars 1993) : 113–27. http://dx.doi.org/10.1016/0045-7906(93)90041-o.

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Zhang, Kai, Guo Xi Li, Jing Zhong Gong, Bao Zhong Wu, Meng Zhang, Xin Yin et Fei Wan. « Research on Data Modeling for Management System of Alignment Information ». Applied Mechanics and Materials 575 (juin 2014) : 848–53. http://dx.doi.org/10.4028/www.scientific.net/amm.575.848.

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Due to lack of considering the non-geometric process parameters during assembly process planning, it is difficult to control the production cycle, cost, quality, reliability, stability and consistency of high-performance mechanical systems. To change this situation, a prototype software is developed by taking into account the non-geometric process parameters. Based on the alignment information, this paper concentrates on the data modeling of the system. With the system, the manufacturing process can achieve the assembly materials management, assembly process planning, alignment process monitoring, alignment data collection and statistical analysis. After analyzing the process data, design parameters will be refined and assembly performance will be optimized.

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Zhang, Xiang Hua, Guo Hong Dai, Feng Xie et Xiao Ying Dong. « Computer Aided Generation the Assembly Process Files for Virtual Assembly ». Applied Mechanics and Materials 201-202 (octobre 2012) : 1008–12. http://dx.doi.org/10.4028/www.scientific.net/amm.201-202.1008.

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Computer Aided Assembly Process Planning is a method of automatically generating assembly process files with computer. This paper describes an integrated assembly process files generation system for virtual assembly. The objectives of this study are to integrate assembly planning of a product with its CAD model, generate a correct and practical assembly sequence and establish a software system to generate the assembly process files. The method of generating assembly process charts for virtual assmbly is researched. The system framework of generating assembly process charts is been set up. The assembly model information that needed for the assembly process charts generation is analyzed. The expression method of assembly sequence and arithmetic of generating assembly process charts is put forward. A speed reducer is used as an example to check the system.

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Jayaram, Uma, YoungJun Kim, Sankar Jayaram, Venkata K. Jandhyala et Tatsuki Mitsui. « Reorganizing CAD Assembly Models (as-Designed) for Manufacturing Simulations and Planning (as-Built) ». Journal of Computing and Information Science in Engineering 4, n^o 2 (28 mai 2004) : 98–108. http://dx.doi.org/10.1115/1.1737772.

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A CAD assembly model is a collection of components, comprised recursively of various levels of individual parts and sub-assembly models. Although the overall geometry in the CAD assembly model accurately represents the final finished product, this model is often meaningless from a manufacturing planning and simulation point of view. The grouping of the components into sub-assemblies and the assembly sequence implied by the CAD model does not accurately represent the manufacturing/assembly sequence or process. Reordering, regrouping, and modifying existing sub-assemblies, or creating new sub-assemblies in the CAD model may be needed to ensure this correspondence for simulation or assembly planning tools that derive the manufacturing sequence directly from the CAD system. Although this task can be performed using the existing functionality of the CAD system, it quickly becomes unwieldy for large industry-grade models due to the assembly constraints and relationships in place during the model creation. In industry today, there are several digital mockup and assembly planning tools that greatly outstrip the ability of CAD systems in loading complete models and creating assembly plans. Methods to organize the CAD model assembly quickly and easily for use in these systems, and to record the “as manufactured” assembly in the CAD data format are needed to close the loop and ease the transfer, storage, and maintenance of model data between the CAD systems, PDM systems, and these new age planning and mockup systems. In this paper, a new hybrid method is proposed to provide this functionality. Of key significance is the fact that using this approach, polygonal representations of any new or modified sub-assemblies designated in the reorganized hierarchy can be produced and that the original constraints used in the original assembly are transformed in a consistent manner to the new components. In addition, corresponding property files for the new components can be created for use in the assembly planning tool. In order to validate this hybrid approach, the time required to rearrange the assembly hierarchy and output the required information using both methods are compared–1) the traditional method using the CAD system alone, and 2) the new hybrid system. A statistical analysis using three treatment factors indicates that if the number of components is more than 15, then it is far more efficient to use the hybrid method over the CAD system by itself. This hybrid method implementation has now been used very successfully in virtual assembly simulations of many industry models, some with several hundred components, provided by various industry partners.

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Zahn, Erich, Andreas Bunz et Lienhard Hopfmann. « System dynamics models : A tool for strategic planning of flexible assembly systems ». System Dynamics Review 3, n^o 2 (1987) : 150–55. http://dx.doi.org/10.1002/sdr.4260030206.

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ZHA, X. F. « Neuro-fuzzy comprehensive assemblability and assembly sequence evaluation ». Artificial Intelligence for Engineering Design, Analysis and Manufacturing 15, n^o 5 (novembre 2001) : 367–84. http://dx.doi.org/10.1017/s0890060401155010.

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Analysis of assembly properties of a product is needed during the initial design stage in order to identify potential assembly problems, which affect product performance in the later stages of life cycle. Assemblability analysis and evaluation play a key role in assembly design, assembly operation analysis and assembly planning. This paper develops a novel approach to assemblability and assembly sequence analysis and evaluation using the concept of the fuzzy set theory and neuro-fuzzy integration. Assemblability is described by assembly-operation difficulty, which can be represented by a fuzzy number between 0 and 1. Assemblability evaluation is therefore fuzzy evaluation of assembly difficulty. The evaluation structure covers not only the assembly parts' geometric and physical characteristics, but also takes into account the assembly operation data necessary to assemble the parts. The weight of each assemblability factor is subject to change to match the real assembly environments based on expert advice. The approach has the flexibility to be used in various assembly methods and different environments. It can be used in a knowledge-based design for assembly expert system with learning ability. Through integration with the CAD system, the developed system can effectively incorporate the concurrent engineering knowledge into the preliminary design process so as to provide users with suggestions for improving a design and also helping to obtain better design ideas. The applications in assembly design and planning show that the proposed approach and system are feasible.

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Abidi, Mustufa H., Abdulrahman M. Al-Ahmari, Ali Ahmad, Saber Darmoul et Wadea Ameen. « Semi-Immersive Virtual Turbine Engine Simulation System ». International Journal of Turbo & ; Jet-Engines 35, n^o 2 (25 mai 2018) : 149–60. http://dx.doi.org/10.1515/tjj-2017-0004.

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AbstractThe design and verification of assembly operations is essential for planning product production operations. Recently, virtual prototyping has witnessed tremendous progress, and has reached a stage where current environments enable rich and multi-modal interaction between designers and models through stereoscopic visuals, surround sound, and haptic feedback. The benefits of building and using Virtual Reality (VR) models in assembly process verification are discussed in this paper. In this paper, we present the virtual assembly (VA) of an aircraft turbine engine. The assembly parts and sequences are explained using a virtual reality design system. The system enables stereoscopic visuals, surround sounds, and ample and intuitive interaction with developed models. A special software architecture is suggested to describe the assembly parts and assembly sequence in VR. A collision detection mechanism is employed that provides visual feedback to check the interference between components. The system is tested for virtual prototype and assembly sequencing of a turbine engine. We show that the developed system is comprehensive in terms of VR feedback mechanisms, which include visual, auditory, tactile, as well as force feedback. The system is shown to be effective and efficient for validating the design of assembly, part design, and operations planning.

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Lang, Yue Dong, Ying Xue Yao, Ping Jun Xia et J. G. Li. « Virtual Assembly System for Large-Scale Complex Products ». Applied Mechanics and Materials 10-12 (décembre 2007) : 444–50. http://dx.doi.org/10.4028/www.scientific.net/amm.10-12.444.

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Due to complex process and high difficult operation for large-scale products assembly, the application of virtual assembly (VA) has an important significance and also an actual value. In this paper the key techniques of VA for large-scale complex products are proposed, and their assembly characteristics (such as their organization form, human participation, process planning and optimization and so on) are analyzed. First, a new virtual environment (VE) system considering human activities is set up. Second, an integration approach is realized to transform data from CAD to VA system, and a hybrid method on the basis of virtual reality (VR) and intelligent algorithm is applied to optimize and evaluate assembly process planning. Moreover, assembly documents generation and Web training for assembly workers are implemented. Finally, an application case of the VA system for a complex product is given, and further work is pointed out.

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Gielisch, Christoph, Karl-Peter Fritz, Benedikt Wigger et André Zimmermann. « Conceptual Planning of Micro-Assembly for a Better Utilization of Reconfigurable Manufacturing Systems ». Applied Sciences 10, n^o 8 (18 avril 2020) : 2806. http://dx.doi.org/10.3390/app10082806.

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Reconfigurable manufacturing systems (RMS) can be used to produce micro-assembled products that are too complex for assembly on flat substrates like printed circuit boards. The greatest advantage of RMS is their capability to reuse machine parts for different products, which enhances the economical efficiency of quickly changing or highly individualized products. However, often, process engineers struggle to achieve the full potential of RMS due to product designs not being suited for their given system. Guaranteeing a better fit cannot be done by static guidelines because the higher degree of freedom would make them too complex. Therefore, a new method for generating dynamic guidelines is proposed. The method consists of a model, with which designers can create a simplified assembly sequence of their product idea, and another model, with which process engineers can describe the RMS and the procedures and operations that it can offer. By combining both, a list of possible machine configurations for an RMS can be generated as an automated response for a modeled assembly sequence. With the planning tool for micro-assembly, an implementation of this method as a modern web application is shown, which uses a real existent RMS for micro-assembly.

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Chiang, Yu Cheng, Chumpol Yuangyai et Chen yang Cheng. « Intelligent robot of inclined assembly sequence planning in Industrial 4.0 ». MATEC Web of Conferences 192 (2018) : 01006. http://dx.doi.org/10.1051/matecconf/201819201006.

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In the industry 4.0, the Cyber-physical system (CPS) is one of the most important core which makes the manufacturing process more intelligent. Intelligent assembly operation is an important key in intelligent manufacturing of CPS. To complete the intelligent assembly operation, the cooperation between assembly robotic arm and assembly sequence planning (ASP) is necessary. However, the ASP and writing robotic codes manually is time consuming and requires professional knowledge and experience. Because the Local Coordinate System (LCS) is often ignored when checking for interference. If product have inclined interference and without considering LCS and causing and infeasible ASP. Therefore, this paper proposes a LCCPIAS (Local Coordinate Cyber-Physical Intelligent Assembly System) system to achieve three objective functions. First, this paper presents a dual-projected-based interference analysis approach (DPIAA) that analyzes the relations between components. Second, this paper generates optimal assembly sequence automatically to let the assembly sequence more suitable for the robotic arm to perform the assembly operation. The last one is LCS can recognize inclined interference between components and generate feasible ASP. Furthermore, this paper uses CAD model to verify that the DPIAA is faster and consider LCS interference can solve inclined interference problem. In the future assembly factory, the proposed method can help to realize intelligent manufacturing.

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