Activity model and computer aided system for defining sheet metal process planning

Ciurana, Joaquim; Ferrer, I.; Gao, James

doi:10.1016/j.jmatprotec.2005.11.031

Cited by 23 publications

(11 citation statements)

References 11 publications

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“…Therefore, this study is based on the premise of compliance with the principles set forth in section 3.4 to reason the acceptable and enforceable process, and allow users to modify the content of process manually in response to different conditions and circumstances (Chapman & Pinfold, 1999;Ciurana et al, 2006).…”

Section: Resultsmentioning

confidence: 99%

Design for Automotive Panels Supported by an Expert System

You¹,

Jeng²,

Liu³

2013

Advances in Industrial Design Engineering

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Section: Resultsmentioning

confidence: 99%

Design for Automotive Panels Supported by an Expert System

You¹,

Jeng²,

Liu³

2013

Advances in Industrial Design Engineering

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“…Based on this literature survey two kinds of bend sequence planning methodologies are found: (1) Bend sequence planning methodologies that are aimed to reduce allowable design tolerances for individual bends during the execution of a bending sequence [7,[10][11][12][13][16][17][18][19][20][21][22][23][24] (2) Bend sequence planning methodologies aimed to reduce total bending time by reducing tool and part handling tome, collision avoidance, ergonomic aspects, and geometric constraints [5,11,[25][26][27][28][29][30][31][32][33][34][35][36][37]. It is revealed during this survey that the effects of material and process variations on the overall part accuracy during the execution of a bending sequence is not reported in literature to the best of authors knowledge.…”

Section: Review Of Bending Processmentioning

confidence: 99%

Sheet-metal bend sequence planning subjected to process and material variations

Faraz

Haq

Ali

et al. 2016

Int J Adv Manuf Technol

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CNC press-brake forming is widely used to transform sheet-metal blanks into complex three-dimensional shapes in a low quantity high variety manufacturing environment. Sheet-metal bend sequence planning is a complex combinatorial problem. Process planning and tolerance reasoning for sheet-metal forming are critical to reduce manufacturing time and to address accuracy aspects. Handling time and accuracy of sheet-metal-formed components strongly depend upon the bending sequence. Process and material variations shrink the tolerance zones and therefore their effect must be incorporated in the overall sheet-metal process planning activity. Monte Carlo simulations are used in this article to evaluate the effect of process and material variations on bending accuracy. Branch-and-bound, traveling salesman problem (TSP)-based techniques are used to identify potential feasible bending sequences. Results from the Monte Carlo simulations are used as input for sheet-metal bend sequence planning. In the case study, proposed methodology is used for available industrial sheet-metal components. Resulted tolerance zones attenuated after the probabilistic deflection analysis. Expected error input from probabilistic deflection analysis produced bending sequences which resulted in formed components within designed accuracy limits. Possibility of forming out of tolerance components is also attenuated.

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“…However, two experts may come up with different plans when facing the same problem, indicating the high heterogeneity that exists in process planning (Ciruana et al, 2006). This has led to the development of the Computer-Aided Process Planning systems (CAPP), which are becoming more and more important in an integrated manufacturing environment (Kumar and Rajotia, 2003).…”

Section: Introductionmentioning

confidence: 99%

“…Vol.11, No.5 (2017) manufacturing processes. CAPP systems have also been developed as a link between Computer-Aided Design (CAD), Computer-Aided Manufacturing (CAM) and Material Requirement Planning (MRP) (Ciruana et al, 2006). In an integrated manufacturing environment, CAPP systems allow the designers to manage the flow of information between CAD, CAM, MRP and Numerical Control (NC) programs.…”

mentioning

confidence: 99%

Development of model identification methodology based on form recognition for Computer-Aided Process Planning

Arriba-Mangas

Fukuda

Aoyama

2017

JAMDSM

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Computer-Aided Process Planning (CAPP) systems have become essential in manufacturing environments to integrate the information between CAD and CAM systems, and to automatically generate the NC code from the CAD model. Though the future of these systems seems to belong to the use of Artificial Intelligence to create knowledge-based algorithms which emulate human decisions, the CAPP systems based on feature recognition and model matching, which use databases of previously known mechanical components to generate new process plans, are also a very interesting option due to their accuracy and smaller development costs. Many researchers have proposed different kind of feature recognition algorithms before. However, these algorithms are usually application-dependent and require external codes to identify the features of wireframe models. This paper proposes a new methodology for shape recognition and model matching stages which improves the accuracy of the recognition tasks, uses solid models instead of wireframe models and can be successfully applied to any kind of part. The methodology is based on an original coding system that links the geometric information extracted from the CAD model with the features of the part by means of an identification sequence which is detailed in the text. Also, a score system has been created for the model matching stage. The obtained results show that the system presents high accuracy in shape recognition, feature identification and model matching tasks, even when the analyzed part is similar to the ones in the database. In addition, quantitative geometric data is also extracted from the CAD model on behalf of future steps of the CAPP system, such as the NC code generation stage. In contrast to other systems, this methodology can be easily applied to the industry since it makes use of the CAD model only. Vol.11, No.5 (2017) manufacturing processes. CAPP systems have also been developed as a link between Computer-Aided Design (CAD), Computer-Aided Manufacturing (CAM) and Material Requirement Planning (MRP) (Ciruana et al., 2006). In an integrated manufacturing environment, CAPP systems allow the designers to manage the flow of information between CAD, CAM, MRP and Numerical Control (NC) programs. This paper focuses in the first stages of CAPP systems which analyze the CAD model of the part and select, from a previously known database, the most similar one. The process plan of the new part can be created automatically based on the process plans of the database's parts. Because of that, this research proposes a new methodology in order to work directly with the CAD model and, consequently, simplify the shape recognition process while improving its accuracy. To do so, the developed system has been divided in three stages (shape recognition, component identification and database-based model matching), and has been laid out as a sequential flow in which the output of a stage is the input for the next one. The proposed methodology works in a solid model environment, avoiding uncl...

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Activity model and computer aided system for defining sheet metal process planning

Cited by 23 publications

References 11 publications

Design for Automotive Panels Supported by an Expert System

Design for Automotive Panels Supported by an Expert System

Sheet-metal bend sequence planning subjected to process and material variations

Development of model identification methodology based on form recognition for Computer-Aided Process Planning

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