Presenting on Wednesday, May 18
Rikard Söderberg is Professor in Product and Production Development at Chalmers University of Technology in Gothenburg, Sweden. He is also Director of the Wingquist Laboratory VINN Excellence Centre.
Title: "Virtual Geometry Assurance Process and Toolbox"
Geometrical variation in individual manufacturing and assembly processes often propagates and accumulates, resulting in products that do not fulfil functional, esthetical or assembly conditions. Geometrical quality problems are often discovered late with huge cost for changes and delays as a consequence. The ability to simulate and foresee geometry problems early, allows robust concepts to be developed, tolerances and assembly sequences to be optimized and key inspection features to be selected.
This talk presents a comprehensive geometry assurance process with an efficient set of tools that supports the geometry assurance process from early concept phases, through verification and pre-production and finally during production.
The presentation builds on the geometry assurance process developed by the authors since 1997, implemented at a large number of companies. Some general conclusions based on the industrial implementation of the results are reported, as well as directions for future research.
Ed Morse is Professor in Mechanical Engineering at the University of North Carolina at Charlotte in Charlotte, USA.
Title: "Interoperability: Linking Design and Tolerancing with Metrology"
On October 30, 2014 the American National Standards Institute (ANSI)
approved QIF v 2.0 (Quality Information Framework, version 2.0) as an
American National Standard. Subsequently in early 2016 QIF version 2.1
was approved. This paper describes how the QIF standard models the
information necessary for quality workflow across the full metrology
After a brief description of the XML 'language' used in the standard,
this talk reports on how the standard enables information exchange
among four major activities in the metrology enterprise (product
definition; measurement planning; measurement execution; and the
analysis and reporting of the quality data).
Steven Hoffenson is an Assistant Professor in the School of Systems and Enterprises at Stevens Institute of Technology, USA.
Title: "Geometry assurance and sustainable design"
Why does geometry assurance matter in today’s world? Conversations and research about tolerancing are distantly removed from contemporary issues like climate change, sustainable energy, and international security. Sometimes, we need to take a step back and see how tolerance decision-making and geometry assurance activities fit into the big picture, namely by focusing on the product development process.
Product development in practice tends to follow a number of different process-oriented paradigms, such as engineering design, systems engineering, systems thinking, and design thinking. In each of these, geometry assurance fits in a particular way at a particular part of the process. Depending on the perspectives of the key decision-makers, the corporate and governmental policies, and the values of the society being operated within, this can be a highly-valued activity or an overlooked part of the design checklist.
One way that tolerancing activities remain relevant is in how they relate to the economic, environmental, and social sustainability of a product throughout its lifecycle. High geometry assurance can indicate a high-quality product that will last a long time, require less maintenance, and lead to fewer parts and products per year ending up in a landfill or junkyard. This talk explores the relationships between tolerancing and design, quality and sustainability, and the true value of geometry assurance in industry, academia, and everyday life.
NEW! Industrial presentation
Sandra Kronholm is the Manager of Robust Design and Tolerancing at Volvo Cars.
Casper Wickman is Technical Leader within Craftsmanship and Ergonomics at Volvo Cars and is also Project Leader for Perceived Quality in the Wingquist Laboratory at Chalmers.
Title: "Challenges within geometry assurance at Volvo Cars"
One of the most severe challenges within operational development at Volvo Cars, is the aim to reach the 20 months time plans in 2020. This vision radically changes product development doctrines in terms of re-definition of traditional working procedures and verifications. As a step towards the vision, deletion of physical series has become a reality. This presentation gives a brief description of how geometry assurance is conducted and integrated in the engineering design process in order to develop and virtually verify our next generation of premium vehicles.
Presenting on Thursday, May 19
Dariusz Ceglarek is Professor and EPSRC Research Chair at the University of Warwick, UK.
Title: "Closed-loop In-process Geometry Assurance for Multi-stage Assembly Systems"
(Co-author: Pasquale Franciosa)
Dimensional and geometric
variation related quality defects significantly affect product quality
and new production ramp-up time of multi-stage assembly systems with
compliant sheet metal parts. Process monitoring and data mining for
geometry assurance and quality control are insufficient in modern
manufacturing as they lack the capability to anticipate defects before
they occur. Nor they can isolate root causes and identify corrective
This presentation explores a novel closed-loop quality control
framework which links defect identification with root case analysis and
corrective action for assembly systems with compliant parts. It is based
on the integration of in-process monitoring and data mining with
multi-physics variation simulation analysis through the development of
simulation-driven surrogate models and closed-loop control strategy. The
framework is demonstrated using an efficient set of novel simulation
tools applied for robotic automotive door assembly.
Vijay Srinivasan is the Division Chief of the Systems Integration Division at the National Institute of Standards and Technology in Gaithersburg, USA.
Title: "Geometrical Specifications of Additively Manufactured Products"
In the world of ISO standards, geometrical product specifications (GPS) refer to both nominal geometry and its allowable variation (tolerances) of a manufactured product. The products under consideration thus far have been manufactured by traditional subtractive and formative processes. So the current GPS standards have been addressing the specifications of such products, and have been quite successful in terms of their industrial adoption. But the emergence of additive manufacturing processes has opened a new vista hitherto unexplored by the GPS community.
In this talk I will describe recent efforts to expand the current GPS standards to cover products resulting from additive manufacturing and some new frontiers in computational modeling of material structures that require fresh thinking about GPS in the context of additive manufacturing.