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Author: Jie Huang
Publisher:
ISBN:
Category : Machine learning
Languages : en
Pages : 224
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Book Description
Author: Jie Huang
Publisher:
ISBN:
Category : Machine learning
Languages : en
Pages : 224
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Book Description
Author: Luiz S. Homem de Mello
Publisher:
ISBN:
Category : Algorithms
Languages : en
Pages : 43
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Book Description
This paper presents an algorithm for the generation of mechanical assembly sequences and a proof of its correctness and completeness. The algorithm employs a relational model of assemblies. In addition to the geometry of the assembly, this model includes a representation of the attachments that bind one part to another. The problem of generating the assembly sequences is transformed into the problem of generating disassembly sequences in which the disassembly tasks are the inverse of feasible assembly tasks. This transformation leads to a decomposition approach in which the problem of dissassembling one assembly is decomposed into distinct subproblems, each being to disassemble one subassembly. It is assumed that exactly two parts or subassemblies are joined at each time, and that whenever parts are joined forming a subassembly, all contacts between the parts in the subassembly are established. Mechanical assembly sequences, Disassembly sequences. (jes).
Author: Alain Delchambre
Publisher: Springer Science & Business Media
ISBN: 9401123225
Category : Science
Languages : en
Pages : 284
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Book Description
The assembly sector is one of the least automated in the manufacturing industry. Automation is essential if industrial companies are to be competitive in the future. In assembly, an integrated and flexible approach is needed because 75% of the applications are produced in small and medium batches. The methodologies developed in this book deal with the integration of the assembly process from the initial design of the product to its production. In such an integrated system, assembly planning is one of the most important features. A well-chosen assembly plan will reduce both the number of tool changes and the fixtures within the assembly cell. It will prevent the handling of unstable subassemblies, simplify the design of the robot grippers and reduce production costs. An automatic generator of assembly sequences can be an efficient aid to the designer. Whenever he or she modifies features of the product, the influence of these modifications can immediately be checked on the sequences. For small batch production, the automatic generation of assembly sequences is faster, more reliable and more cost-effective than manual generation. By using this latter method interesting sequences could be missed because of the combinatorial explosion of solutions. The main subjects treated in this book are as follows. 1. Presentation and classification of existing systems of automatic generation of assembly sequences. Automatic assembly planning is, indeed, a very recent research area and, in my experience, no systematic study has been carried out up to now.
Author: SaŹ¹id Golabi
Publisher:
ISBN:
Category : Assembly-line methods
Languages : en
Pages : 510
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Book Description
Author: Alain Delchambre
Publisher: Springer
ISBN: 9789401050258
Category : Science
Languages : en
Pages : 276
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Book Description
The assembly sector is one of the least automated in the manufacturing industry. Automation is essential if industrial companies are to be competitive in the future. In assembly, an integrated and flexible approach is needed because 75% of the applications are produced in small and medium batches. The methodologies developed in this book deal with the integration of the assembly process from the initial design of the product to its production. In such an integrated system, assembly planning is one of the most important features. A well-chosen assembly plan will reduce both the number of tool changes and the fixtures within the assembly cell. It will prevent the handling of unstable subassemblies, simplify the design of the robot grippers and reduce production costs. An automatic generator of assembly sequences can be an efficient aid to the designer. Whenever he or she modifies features of the product, the influence of these modifications can immediately be checked on the sequences. For small batch production, the automatic generation of assembly sequences is faster, more reliable and more cost-effective than manual generation. By using this latter method interesting sequences could be missed because of the combinatorial explosion of solutions. The main subjects treated in this book are as follows. 1. Presentation and classification of existing systems of automatic generation of assembly sequences. Automatic assembly planning is, indeed, a very recent research area and, in my experience, no systematic study has been carried out up to now.
Author: Geoffrey Boothroyd
Publisher:
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 400
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Book Description
Author: Luc Laperriere
Publisher:
ISBN:
Category : Assembling machines
Languages : en
Pages : 264
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Book Description
Author: Yan Wei
Publisher:
ISBN: 9789065622952
Category :
Languages : en
Pages : 207
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Book Description
Author: Ranjith Poladi
Publisher:
ISBN:
Category :
Languages : en
Pages : 100
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Book Description
The Assembly sequencing problem (ASP) is part of the assembly planning process. The ASP is basically a large scale, combinatorial problem which is highly constrianed. The aim of this thesis is to automatically generate assembly sequence(s) for mechanical products. In this thesis, the CAD model of an assembly is represented or modeled as a label-rich graph. The assembly sequences are generated using graph grammar rules that are applied on the graph. The sequences are stored in a search tree and to find an optimal sequence multiple evaluation criteria like time, subassembly stability and accessibility measures are used. This research implements a novel tree search algorithm called "Ordered Depth First Search" (ODFS) to find an optimal assembly sequence in very low processing time. The software has successfully generated an optimized assembly sequence for an assembly with 14 parts.
Author: Pongsak Dulyapraphant
Publisher:
ISBN:
Category : Assembly-line methods
Languages : en
Pages : 230
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Book Description
To search for the precedence constraints, all possible disassembly directions are determined first. Then, a search for precedence constraints among parts in each predefined disassembly direction is performed. Disassembly trees are used to represent the precedence constraints among the parts, which are continuously disassembled one after the other from the same direction, while layers are used to prioritize the hierarchy among the disassembly trees. The use of layers and disassembly trees dramatically reduces the search space of the precedence constraints among parts in the assembly during assembly-sequence generation.
