Osiris Canciglieri

Information sharing in multiviewpoint injection moulding design and manufacturing

Global competitiveness challenges manufacturing industry to bring to market well designed and manufactured new products at competitive prices in as short a lead-time as possible. To achieve this, inputs are needed from experts in a multitude of disciplines as well as from customers and suppliers. While the use of design teams is achieving success, there is a need for modern software tools that support design and manufacture to be radically improved. Typically, design for manufacture software systems does not support the multiple views of information needed for information systems to be able to support multiple manufacturing perspectives. This paper proposes a linked, multiviewpoint, product model structure as a means of supporting the many views of product information necessary in team-based design and manufacturing systems. To test the ideas developed, an experimental product model has been implemented using an object-oriented database that focuses on views related to the design and manufacture of injection-moulded products. The experimental system explores the relationships between three views: mouldability, cavity design and cavity machining views.

Towards expressive ontology-based approaches to manufacturing knowledge representation and sharing

The present capability that ontological approaches offer to formally represent and share manufacturing knowledge is dependent on the choice of ontological formalism. Currently, there exists a spectrum of these formalisms, which is being subjectively exploited across multiple domains in design and manufacture. Hence, there is an important prerequisite to achieve an understanding of which family of formalism strictly enables the expressive capture of semantics to progress towards meaningful information and viable knowledge sharing. This article analyses the relative strengths and weaknesses in employing a ‘lightweight’ ontology versus a ‘heavyweight’ version of the ontology to represent and share knowledge between multiple domains in injection moulding design and manufacture. A pertinent direction, from an ontology perspective, is then exposed as a prescription for the improved capture and dissemination of formal semantics, to support multi-domain knowledge sharing.

Information mapping across injection moulding design and manufacture domains

The process of developing new products is complex, partly due to the wide areas of expertise that need to work together to achieve the best results. Whilst a broad range of software tools is now available to support specific areas of product development, and Product Lifecycle Management systems are starting to support information sharing, the provision of software environments that enable the sharing of information and knowledge across multiple domains of expertise is still a major issue. This paper utilises a set of engineering domain ontologies and investigates the development of mapping methods between them. The work focuses on the development of plastic injection moulded products and has used the particular domains of mouldability, mould cavity design and mould cavity manufacturing to explore the mapping methods across domains. It identifies the critical requirement for mapping methods as understanding the pre-conditional knowledge that constrains the domain boundaries. Experimental mapping methods based on these requirements have been constructed and are discussed in the context of case studies in information sharing for injection moulded product development.

Manufacturing information interactions in data model driven design

Abstract This paper presents a novel view of a software environment that has the potential to provide manufacturing information support to product design in line with the aims of concurrent engineering. The arguments developed should have significant consequences for future computer aided engineering (CAE) systems development and support the continuing globalization in business development. The approach taken has at the centre of its philosophy the need to provide designers with high-quality information on which to base their decisions. The concept of an information supported product design environment is not new, but a range of issues related to information interactions has yet to be resolved. This paper explores the use of information models to support functional and manufacturing interactions in design as well as the issues that are raised in attempting to support multiple views in design for manufacture. The design of injection moulded products is used as the focus against which the ideas in the paper are explored.

Multi-attribute method for prioritization of sustainable prototyping technologies

The integration and quickness between the phases of product development process are key elements for companies’ competitiveness and the prototyping technologies provide relevant means for the development of new products. The prototyping of products by additive manufacturing can vary in quality, costs, materials and characteristics, however, incorporating environmental and sustainable attributes are important strategies to support the design for manufacturing. This paper proposes method for multi-attribute evaluation of prototyping technology associated with sustainable product conception. This proposal focuses on improving the decision-making process and provide the prioritization of technical characteristics and it was evaluated and validated, through case studies, applying selective laser sintering and fused deposition modelling technologies into two prototype developments: a bristles protector (lightweight composite product) and a toothbrush (single massive product). The research innovates by proposing a matrix that allows the inclusion of environmental and sustainable features in the design decision-making process, promoting the integration of multiple perspectives that involves customer, product and technology associated with sustainable concepts meeting the current demand of the society and companies for the development of sustainable products.

Sustainable Product Design: The Development of a Conceptual Model

This paper presents the development of a conceptual model for Method Integrated Product Development Oriented for Sustainability. The proposed method aims to assist designers in the development process, generating design alternatives directed at sustainable development and full life cycle of the product. This research was limited to application of the method to a product category through a case study. The research objective is to present the process of development and application of the method. The results indicate that the proposed method provides the development process to insert the rationale for the development of sustainability-oriented products as a complement to traditional design requirements in existing models of product development. It is believed that its application to other product designs is promising for the development of sustainable solutions.

CT slice retrieval by shape ellipses descriptors for skull repairing

This paper addresses the problem of automated prosthesis modelling and manufacturing, whose machining parameters are based on images extracted from different medical databases. The specific case of 3D surface restoration of a defective skull was used as study case. A method based on adjusted ellipses on skull bone curvature performs the symbolic representation of searching parameters. The superellipse concept permits to define geometric parameters to fit an ellipse on each Computed Tomography slice. Those ellipse descriptors can be used as a template for the retrieval of similar images from databases whose parameters match the sampled image. The similarity is measured according to the best fitness values through an optimization algorithm. The slices found by similarity are retrieved from all databases in order to build the 3D model. Experiments show that the proposed method is a promising technique for content based image retrieval.

Semantic interoperability for an integrated product development process: a systematic literature review

Global competitiveness challenges manufacturing industry to rationalise different ways of bringing to the market new products in a short lead-time with competitive prices whilst ensuring higher quality levels and customisation. Industries need to effectively share heterogeneous information during Product Development Process (PDP) within and across their institutional boundaries to be competitive. However, problems with misinterpretation and mistakes have been identified during information exchange due to the semantic interoperability obstacles. Thus, this research proposes a systematic literature review to identify the main researches and the milestones reference works on semantic interoperability field. A rigorous methodology was conducted in different databases, covering the articles published in scientific journals from 2005 to 2015 as a preliminary study had indicated that the incidence of articles related to the subject was more frequent from the second half of the 2000s. The research structure consisted of four steps: Survey – searching, analysis and selection of recent researches; Categorisation – categorisation of the selected papers; References citation frequency analysis – the selected papers were analysed and the main researches and milestones references were identified; and Main researches critical analysis – the main researches were analysed for their contributions and limitations, their contributions and limitations, resulting in 14 selected scientific articles and 8 identified milestones references. It is evident that this field has interesting perspectives on future research opportunities on semantic interoperability of information issues across PDP, contributing to the new concepts of future factories.

Geometric modeling from the medical images in the CAD system to support prosthesis design

This paper presents an individual designing prosthesis for surgical use and proposes a methodology for such design through mathematical extrapolation of data from digital images obtained via tomography of individual patients bones. Individually tailored prosthesis designed to fit particular patient requirements as accurately as possible should result in more successful reconstruction, enable better planning before surgery and consequently fewer complications during surgery. Fast and accurate design and manufacture of personalized prosthesis for surgical use in bone replacement or reconstruction is potentially feasible through the application and integration of several different existing technologies, which are each at different stages of maturity. Initial case study experiments have been undertakeSn to validate the research concepts by making dimensional comparisons between a bone and a virtual model produced using the proposed methodology and a future research directions are discussed.

Development of White Goods Parts in a Concurrent Engineering Environment Based on DFM/DFA Concepts

The classical way to manage the product development processes for massive production has been changing as the high pressure for cost reduction, higher quality standards and market seeking for innovation lead to the necessity of new tools for development control. This context and the learning from the automotive, aerospace industries and others segments were the starting point to understand and apply manufacturing and assembly oriented designs to ease the task of generate goods and from this to obtain at least part of the expected results. This paper demonstrates the applicability of the concepts of Concurrent Engineering and DFM/DFA (design for manufacturing and assembly) in the development of products and parts for the White Goods industry in Brazil (major appliances as refrigerators, cookers and washing machines), showing one case concerning to the development and releasing of a component. Finally, it shows, shortly, how using these techniques as a solution had provided cost savings and reduction in delivery time.