Abstract:Today the assembly sequence for the products is often carried out manually and its definition, typically, is very expensive, not guaranteeing optimal solutions. Coming up with an efficient assembly sequence is the essential step to improve process productivity and reduces the time and costs related to assembly machines and equipment. The issue related to the assembly sequence of a product depends on the total number of the its components. In particular, the number of the possible sequences can be obtained thro… Show more
“…Viganò and Gómez speed up their search by delaying evaluation of feasibility until after sub-assemblies are identified. [15] B. ASP with Motion Planning Current methods seek to incorporate motion planning into ASP. That is, the cost and quality of motion plans influences arXiv:1907.03835v1 [cs.RO] 8 Jul 2019 Fig.…”
Section: Related Work a Subassembly Identificationmentioning
The sequence in which a complex product is assembled directly impacts the ease and efficiency of the assembly process, whether executed by a human or a robot. A sequence that gives the assembler the greatest freedom of movement is therefore desirable. Our main contribution is an expression of obstruction relationships between parts as a disassembly interference graph (DIG). We validate this heuristic by developing a disassembly sequence planner that partitions assemblies in a way that prioritizes access to parts, resulting in plans that are comparable in efficiency to two state-of-the-art assembly methods in terms of total plan length. Using DIG, our method generates successive subassembly decompositions, yielding a tree structure that makes parallization opportunities apparent. Our planner generates viable disassembly plans by minimizing our part blockage measure, and thereby demonstrates that this measure is a valuable addition to the Assembly Sequence Planning toolkit.
“…Viganò and Gómez speed up their search by delaying evaluation of feasibility until after sub-assemblies are identified. [15] B. ASP with Motion Planning Current methods seek to incorporate motion planning into ASP. That is, the cost and quality of motion plans influences arXiv:1907.03835v1 [cs.RO] 8 Jul 2019 Fig.…”
Section: Related Work a Subassembly Identificationmentioning
The sequence in which a complex product is assembled directly impacts the ease and efficiency of the assembly process, whether executed by a human or a robot. A sequence that gives the assembler the greatest freedom of movement is therefore desirable. Our main contribution is an expression of obstruction relationships between parts as a disassembly interference graph (DIG). We validate this heuristic by developing a disassembly sequence planner that partitions assemblies in a way that prioritizes access to parts, resulting in plans that are comparable in efficiency to two state-of-the-art assembly methods in terms of total plan length. Using DIG, our method generates successive subassembly decompositions, yielding a tree structure that makes parallization opportunities apparent. Our planner generates viable disassembly plans by minimizing our part blockage measure, and thereby demonstrates that this measure is a valuable addition to the Assembly Sequence Planning toolkit.
“…Computer-aided methods and algorithms were developed to extract liaison matrix through APIs from 3D CAD models to perform ASG. 21,75,82–84 Figure 4 represents a flow chart to extract liaison matrix from 3D CAD model by performing assembly contact analysis. Figure 4.Mechanism to extract liaison matrix.…”
Section: Terminology Associated With Asgmentioning
confidence: 99%
“…The recent research has been focused on achieving feasible assembly sequences directly through 3D CAD model without any user intervention. [80][81][82][83][84] The present article describes the efforts made in the area of ASG methods and its automation from past three decades. The paper is organised as follows, the next section discusses basic assumptions followed in ASG methods, and the subsequent section is focused on the most common terminology associated with ASG and their advancements.…”
Section: Introductionmentioning
confidence: 99%
“…The recent research has been focused on achieving feasible assembly sequences directly through 3D CAD model without any user intervention. 80–84…”
Sequence of feasible mechanical assembly operations plays significant role in overall cost optimisation process for manufacturing industry and thus great importance is given to assembly sequence generation from past four decades. Though achieving at least one feasible sequence is focused in the earlier stages of research, the introduction of soft computing techniques attracted the industrial engineers towards cost-effective, optimised assembly sequences to attain economical manufacturing process. The integration of assembly sequence generation methods with computer aided design environment ensures more correctness and flexibility to automate the process. In this paper, a detailed review on various methods, their applications and limitations is presented and well discussed.
“…16 Viganò and Gómez presented an automatic method based on the contacts and interferences information obtained from the CAD model. 17 The proposed approach reduces the number of obtained assembly sequence and assures at least a feasible one. The appearance of automation does not only offer the user ergonomics, but contributes more to the accuracy and efficiency of results by reducing human intervention.…”
Assembly sequence planning has drawn the attention of many researchers over the last years. Despite, the great development of CAD software in many aspects (simulation algorithms, interfaces, and ergonomics), automatic generation of assembly sequence planning from CAD assembly remains an issue to improve especially with the increasing complexity of industrial products. In this paper, an approach of assembly sequence planning generation from a CAD assembly model is presented. In order to generate feasible assembly sequence planning, the developed approach begins with the exploration of CAD assembly. Then, a collision analysis is performed to identify all possible obstacles during the components’ motion. An example of CAD assembly is presented in all sections of this paper in order to demonstrate the efficiency of the proposed approach.
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