Will Model-based Definition replace engineering drawings throughout the product lifecycle? A global perspective from aerospace industry (original) (raw)
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Model Based Definition: Finally, the Engineering Drawing Killer?
2019
The Engineering drawing has stood as the universal method of translating design intent since the first standard was formalized in 1927 as BS308. Further development of national and international standards has been informed by advances in CADCAM technology and the need for transfer of complex yet unambiguous definition between organisations. The emergence of model based definition (MBD) has driven a new workflow where the engineering drawing is no longer required. Instead, the dataset includes semantic, machine readable, tolerancing of surfaces and features for integration into manufacturing and metrology procedures. Despite the advantages of MBD, it has been largely ignored in UK Higher Education. However MBD is the ideal method for teaching and learning geometrical tolerancing since it ignores the theoretically exact dimensions and housekeeping, concentrating on the functional limits. Further, it utilises the 3D workspace that students are increasingly familiar with.
Computer-Aided Design and Applications, 2010
Reducing the costs of bringing a new product to market is an objective common to all industries. In aeronautics, one of the options being pursued to achieve this goal is to eliminate the use of traditional engineering drawings from the product development process-chiefly by integrating a portion of the information normally contained in these drawings into a 3D digital mockup (DMU). Before making this major change, several industrial practices must be revised and certain technological problems need to be resolved. One of the challenges is the transposition of the information found on traditional 2D engineering drawing, namely notes, dimensions and tolerances, to a 3D DMU. This article presents an evaluation of the feasibility of enriching 3D DMU with the aim of eliminating engineering drawings, based on the results of experiments in transposing samples of aerospace 2D engineering drawings to 3D environments using Catia V5 R17 SP6, a Computer-Aided Design software product. Experimental results show that placing annotations on the 3D DMU is feasible even for complex aerospace drawings. These results should help engineering design organizations decide if eliminating traditional engineering drawings is suitable for them.
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A successful implementation of the Model-Based Enterprise concept (MBE) requires maximizing the potential benefits of annotated 3D models. The foundations of the MBE model are established by digital product definition data practices, which are currently regulated by standards such as ASME Y14.41-2003 and ISO 16792:2006. At the center of the MBE concept is the notion of CAD model reusability, which relies on the idea that 3D CAD models can be reused both throughout the entire product lifecycle and as a starting point for future development of new products. In this context, a critical aspect of CAD model reuse is the proper identification and understanding of the geometric design intent that is usually expressed implicitly within the CAD model. In this work, we present a method to communicate geometric design intent explicitly by overloading and extending the scope of the current annotation instruments available in the MBE approach. We propose a new broader type of model annotation th...
Model based engineering standardization and validation
2011
3D Model-Based Engineering (MBE) is an approach to product design, manufacturing, and support where a digital three-dimensional representation of the product serves as the normative source for information communicated throughout the product's lifecycle and supply chain. MBE simplifies data management and provides a more powerful communication medium than 2D-based environments. Lightweight formats, offering a low-cost way for humans to view and potentially for applications to consume geometry and Product Manufacturing Information (PMI), are a critical component of MBE and enable collaboration without requiring that business partners buy expensive Computer-aided Design (CAD) systems. These formats are becoming increasingly popular-and increasingly complex-as their representational capabilities grow. Their value to industry is driving a push for standardization. We discuss the advent of MBE, the standards and technologies that make it possible, and the importance-and challenges-of product data validation. NOMENCLATURE
Re-engineering the Engineering Change Management process for a drawing-less environment
Computers in Industry, 2012
Engineering Change Management (ECM) Engineering drawing Drawing-less Model-based Definition (MBD) Product lifecycle A B S T R A C T Currently, 3D models and 2D drawings are the main basic elements that together form and carry the product definition throughout the product lifecycle. With the advent of the Digital Product Definition trend, industries have been interested in adopting a Model-based Definition (MBD) approach that enables the integration of drawing annotations directly onto a 3D model, thereby minimizing the need to generate engineering drawings. This drawing-less environment requires a way to adequately carry the product definition throughout a product's lifecycle while supporting all of the downstream users' specific needs. The objective of this article is to present a solution to carry the Engineering Change Management (ECM) process in a drawing-less environment. Therefore, based on ECM process requirements from two Canadian aerospace companies, we propose an MBD dataset which consists of an MBD model and a distribution file. The proposed MBD dataset is evaluated and the MBD-driven ECM process is outlined. ß
IFAC-PapersOnLine, 2016
The paper describes and analyzes the Model Based Definition (MBD) and Product Lifecycle Management (PLM) technologies and their related Computer-Aided X applications in order to enable the implementation of an integrated design and manufacturing system in Chinese aeronautical industry. Using the full three-dimensional technology allows the MBD specification of geometry, features and attributes for mechanical parts. It also supports an integrated design method for specifying MBD models of these parts. Considering the manufacturing specifications based on MBD, the feature machining and Coordinate Measuring Machine (CMM) control technologies are used for intelligent manufacturing of parts. Machining and quality inspection programs are automatically generated including the associated MBD process and quality models. Finally, the integrated design and manufacturing system based on MBD and PLM technologies is applied on the case study of an engine fan blade in order to assess the proposed method.
Integration of Design Tools and Knowledge Capture into a CAD System: A Case Study
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Conceptual design phase is partially supported by product lifecycle management/computer-aided design (PLM/CAD) systems causing discontinuity of the design information flow: customer needs -functional requirements -key characteristics -design parameters (DPs) -geometric DPs. Aiming to address this issue, it is proposed a knowledge-based approach is proposed to integrate quality function deployment, failure mode and effects analysis, and axiomatic design into a commercial PLM/CAD system. A case study, main subject of this article, was carried out to validate the proposed process, to evaluate, by a pilot development, how the commercial PLM/CAD modules and application programming interface could support the information flow, and based on the pilot scheme results to propose a full development framework.
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Journal of Engineering Design, 2013
The Decision Rationale editor (DRed), an IBIS derivative, originally developed to support the capture of design rationale has progressively evolved into a tool to map an integrated information space covering product planning, specification, design, and service. This article presents the research undertaken to enable this evolution and to test the application of the tool in industry. The work consisted of extending the notation and the functionality of the DRed tool in the service of new methods for information representation and developing a new approach to designing and its documentation by integrated diagrams. Thus far the approach has been taught for two years and a half to engineering graduates involved in the training programme of the collaborating company. The application of the approach to an aerospace engineering design task is illustrated through a case study. The results of the evaluation have shown that creating large digital information spaces is feasible and delivers benefits to users.