An approach to determine geometric feasibility to assembly states by intersection matrices in assembly sequence planning

Sınanoğlu, Cem; Börklü, Hüseyin Rıza

doi:10.1023/b:jims.0000034118.19127.48

Cited by 9 publications

(7 citation statements)

References 6 publications

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“…Wang et al [9] coupled the solution space generation and disassembly solution optimization into one technical framework, represented all assembly/disassembly sequences in the DFIG (disassembly feasibility information graph) model, and proposed an integrated methodology for mechanical assembly planning. Sinanoǧlu and Börklü [10] proposed an approach for the development of a process for the determination of geometric feasibility whose binary vector representation corresponds to assembly states. Zhong et al [11] presented a determination system of assembly units for the hull structure in order to shorten construction cycle time and construction quality in shipbuilding and introduced the assessment model by fuzzy synthetic evaluation.…”

Section: Assembly Sequence Planningmentioning

confidence: 99%

Research on Key Technologies of Unit-Based CNC Machine Tool Assembly Design

Sheng

Zhang

Xie

et al. 2014

Mathematical Problems in Engineering

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Assembly is the part that produces the maximum workload and consumed time during product design and manufacturing process. CNC machine tool is the key basic equipment in manufacturing industry and research on assembly design technologies of CNC machine tool has theoretical significance and practical value. This study established a simplified ASRG for CNC machine tool. The connection between parts, semantic information of transmission, and geometric constraint information were quantified to assembly connection strength to depict the assembling difficulty level. The transmissibility based on trust relationship was applied on the assembly connection strength. Assembly unit partition based on assembly connection strength was conducted, and interferential assembly units were identified and revised. The assembly sequence planning and optimization of parts in each assembly unit and between assembly units was conducted using genetic algorithm. With certain type of high speed CNC turning center, as an example, this paper explored into the assembly modeling, assembly unit partition, and assembly sequence planning and optimization and realized the optimized assembly sequence of headstock of CNC machine tool.

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Section: Assembly Sequence Planningmentioning

confidence: 99%

Research on Key Technologies of Unit-Based CNC Machine Tool Assembly Design

Sheng

Zhang

Xie

et al. 2014

Mathematical Problems in Engineering

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“…In [4] a classification of the different types of connections is provided, and in [18,6] the graphs of connections are represented as liaison matrices. There are also more particular representations [21] where predicates are used to specify the relative positions of the different parts (part 1 on top of 2, part 2 at +x with respect to part 5, etc.).…”

Section: Geometric Analysis and Problem Representationmentioning

confidence: 99%

“…The AND branches represent the disassembly of a part (or a subset of parts), whereas the OR branches (different paths from the same node) represent different disassembly options. In a later stage, it is possible to analyze the feasibility of the sequences using knowledge databases [4], geometrical approaches [18], ad-hoc algorithms [23] that differentiate parts and connectors, or building Non-Directional Blocking Graphs [22]. Finally, an algorithm based on the so-called motion space is presented in [7].…”

Section: Geometric Analysis and Problem Representationmentioning

confidence: 99%

Local Heuristics Analysis in the Automatic Computation of Assembly Sequences for Building Structures with Multiple Aerial Robots

Sempere

Llorente

Maza

et al. 2014

ROBOT2013: First Iberian Robotics Conference

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Abstract. This paper deals with the automatic computation of the assembly sequence for building truss structures from their 3D geometrical analysis. This functionality is part of the autonomous planning architecture of a team of aerial robots equipped with on-board robotic arms. The mission of the team is the construction of a structure in places where the access is difficult by conventional means. The assembly sequence is computed by applying the well known "assembly-by-disassembly" technique to the Non-Directional Blocking Graphs (NDBG) obtained from the geometrical analysis of the structure. In this paper two novel local heuristics are presented to solve the assembly problem: the former is based on the number of free nodes in the graphs and the latter is related to the size of the resulting connected subgraphs when each disconnection is applied to a set of parts. Both techniques are designed to compute the assembly sequence that allows to parallelize the building process of the structure if enough robots are available. Simulation results as well as experimental results with an aerial robot are presented in the paper.

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“…In this system, in order to get contact matrices in the direction of Cartesian coordinate axis, assembly view of pincer system was used. These matrices were automatically constructed (Sinanoğlu & Börklü, 2004). Contact matrices of the pincer assembly system are also shown in Fig.…”

Section: Definition Of Contact Matrices and Acgmentioning

confidence: 99%

“…Scanning module scans various assembly views of any product whose assembly view is produced by CAD packet program in the computer environment and determines to contact and interference relations between parts (Sinanoğlu & Börklü, 2004).…”

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confidence: 99%