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On optimal tolerancing in computer-aided design

H. Pottmann, B. Odehnal, M. Peternell, J. Wallner, R.A. Haddou
2000 Proceedings Geometric Modeling and Processing 2000. Theory and Applications  
We also study congruence transformations in the presence of errors and families of circles arising in metric constructions under the assumption of tolerances in the input.  ...  The computation of the boundaries of the tolerance zones for curves / surfaces is discussed.  ...  Acknowledgements This research has been supported in part by projects P12252-MAT and P13648-MAT of the Austrian Science Fund. R.  ... 
doi:10.1109/gmap.2000.838266 dblp:conf/gmp/PottmannOPWH00 fatcat:wxoxrpkwvzerbfil25qrk3wkaq

Tolerancing Informatics: Towards Automatic Tolerancing Information Processing in Geometrical Variations Management

Benjamin Schleich, Nabil Anwer
2020 Applied Sciences  
The management of geometrical variations throughout the product life cycle strongly relies on the gathering, processing, sharing and dissemination of tolerancing information and knowledge.  ...  In this regard, the main aim of the paper is to structure existing tolerancing informatics workflows as well as to derive future research potentials and challenges in this domain.  ...  information (PMI) in three-dimensional part views of computer-aided design models, which is supported by most commercial computer-aided design tools.  ... 
doi:10.3390/app11010198 fatcat:x7fcyb3xmrdkxlxe6enjtn5udy

How can Computer Aided Tolerancing Support Closed Loop Tolerance Engineering?

Benjamin Schleich, Sandro Wartzack
2014 Procedia CIRP  
Therefore, in this paper, the prerequisites for a holistic computer aided tolerancing process during product development based on the CLTE model are analysed.  ...  Though computer aided engineering tools are widely spread in product development practice with the aim to ease product design and analysis, these tools are mainly used separately and are not integrated  ...  However, computer-aided engineering tools are widely spread in product development practice with the aim to ease product design and analysis, such as e. g. computer-aided design and computer-aided analysis  ... 
doi:10.1016/j.procir.2014.03.129 fatcat:2dtj5bdkejg5jbdl5lnnrx7wri

Managing uncertainty in the new manufacturing era

Giovanni Moroni, Stefano Petrò
2018 Procedia CIRP  
To design and optimize production systems as well as to choose the optimal product matches, product analysis methods are needed.  ...  and product designers.  ...  Acknowledgements The 15th CIRP Conference on Computer Aided Tolerancing has been organized by the Department of Mechanical Engineering of Politecnico di Milano, with the support of the Italian Association  ... 
doi:10.1016/j.procir.2018.07.001 fatcat:czd43ig7pvcq5gfnth3ujxtzne

Recent Developments in Tolerancing Techniques

Kamlesh Purohit, C.S. Sharma
1999 Defence Science Journal  
This paper reviews the recent developments in the field of tolerancing techniques, particularly with reference to the use of computers, cost tolerance relationship and tolerance design for quality improvement  ...  Mechanical tolerances are specified in conjunction with part geometry, material type and other technical specifications during the design of mechanical components and assemblies. , These tolerances ensure  ...  However, the use of neural network in computer-aided tolerancing has yet to emerge. CONCLUSION In this paper, a survey of various tolerancing techniques is presented.  ... 
doi:10.14429/dsj.49.3841 fatcat:6nsonqlhybg7ppbqwpaekqsvnu

Key research on computer aided tolerancing

Yan-long Cao, Luc Mathieu, Jane Jiang
2015 Journal of Zhejiang University: Science A  
Computer aided tolerancing (CAT) covers a wide range of subjects including specification and standardization, tolerancing in design/manufacturing process/product life management, verification and metrology  ...  These standards have evolved and their rapid development has brought about many significant changes to tolerancing in design and manufacturing.  ...  process in order to establish a connection between a computer aided design and computer aided inspection system.  ... 
doi:10.1631/jzus.a1500093 fatcat:ldiv66e7d5bubopx4ltrbjskjq

Tolerancing from STL data: A Legacy Challenge

Torbjørn Langedahl Leirmo, Oleksandr Semeniuta, Kristian Martinsen
2020 Procedia CIRP  
Computer aided tolerancing of actual part geometry is hindered by the sparse information about the nominal geometry directly available in STL data, therefore the feature information is often assumed or  ...  To design and optimize production systems as well as to choose the optimal product matches, product analysis methods are needed.  ...  Computer aided tolerancing (CAT) heavily relies on the availability of feature information, but in a situation where the original CAD file is unavailable, this 16th CIRP Conference on Computer Aided Tolerancing  ... 
doi:10.1016/j.procir.2020.05.180 fatcat:pwkuve3tvjacvghtmjhvydnv7u

Opportunities and Constraints in the Standardization of Geometrical Product Specification

Edward Morse
2020 Procedia CIRP  
A key focus of the CIRP CAT 2020 is the role of standardization in GPS specification, and the constraints and opportunities provided by standards throughout the design lifecycle, including in the verification  ...  The CIRP CAT conferences provide an opportunity for researchers and practitioners to exchange new ideas and discuss the implications of new and evolving research in the areas of geometrical tolerancing  ...  Acknowledgements The 16 th CIRP Conference on Computer-Aided Tolerancing has been organized with the resources of the Department of Mechanical Engineering and Engineering Science at the University of North  ... 
doi:10.1016/j.procir.2020.07.001 pmid:32834984 pmcid:PMC7429515 fatcat:ebzsz6ccsned5efw45pdptazlm

Special issue: Uncertainties in geometric design

Tony C. Woo
1993 Computer-Aided Design  
These two questions form the theme of this special issue of Computer-Aided Design.  ...  In geometric computing, the 'logic' for performing set operations is not necessarily the classical binary one. How, then, does one ensure a robust process, if not error-free results?  ...  Tony C Woo University of Michigan USA 0010-4485193/090523-01 © 1993 Butterworth-Heinemann Ltd Computer-Aided Design Volume 25 Number 9 September 1993 523  ... 
doi:10.1016/0010-4485(93)90068-y fatcat:o5ihpnwcxvaexine5dml7z7ode

Review: geometric and dimensional tolerance modeling for sheet metal forming and integration with CAPP

Wang Rui, Georg Lothar Thimm, Ma Yongsheng
2010 The International Journal of Advanced Manufacturing Technology  
with computer-aided process planning systems.  ...  The cross-section in all orientations is potentially changed. Table 2 Common operations on sheet metal parts Cutting operations Bending operations  ...  In: Proceedings of the 5th CIRP Seminar on Computer-Aided Tolerancing. Toronto, Ontario 32.  ... 
doi:10.1007/s00170-010-2663-x fatcat:m7kuyeauufccrckwofpn5bgerq

A statistical approach for tolerancing from design stage to measurements analysis

Ambre Diet, Nicolas Couellan, Xavier Gendre, Julien Martin, Jean-Philippe Navarro
2020 Procedia CIRP  
Acknowledgment Industrial application on tolerance definition is the topic of a patent application FR15508 n o 1912668.  ...  This work was partly supported by the Agence Nationale de la Recherche through a CIFRE contract 2017/1390 in partnership with Airbus.  ...  In [6] , they also present different tools such as 3D software for computer aided design and tolerancing.  ... 
doi:10.1016/j.procir.2020.05.171 fatcat:js5xyz7kxfarpczwtryv5vk3o4

Reflections on the role of science in the evolution of dimensioning and tolerancing standards

Vijay Srinivasan
2012 Proceedings of the Institution of mechanical engineers. Part B, journal of engineering manufacture  
This trend encountered a major hurdle in early 1980s when the emergence of computer-aided design and manufacturing systems forced a drastic reexamination of these standards with a greater emphasis on mathematical  ...  Dimensioning and tolerancing standards originated about 75 years ago in the form of various national and company standards that governed engineering drafting and documentation practices.  ...  Acknowledgements I would like to acknowledge the contributions of various subject matter experts in the ASME and ISO standards committees to the developments reported in this paper.  ... 
doi:10.1177/0954405412464012 fatcat:ij3dsltcrnezrh3ipiosvxousm

Analysis of Approaches of Tolerance Allocation regarding to Economic Efficiency

Peter Gust, Alina Sersch, Tobias Steger, Christoph Schluer
2019 Proceedings of the International Conference on Engineering Design  
of the specifications selected for tolerancing be determined in a technical drawing during the product development process in accordance with GPS on the basis of the current state of research?  ...  AbstractThe aim of this paper is to examine the current state of research on tolerance-induced costs in Germany.  ...  Computer-aided procedures in particular are of great importance for the economic allocation of tolerances.  ... 
doi:10.1017/dsi.2019.355 fatcat:fjsvndkfczcrjeadnrnikaej2e

A nonlinear programming approach to optimal design centering, tolerancing, and tuning

J. Bandler, P. Liu, H. Tromp
1976 IEEE Transactions on Circuits and Systems  
He is author or coauthor of fbur papers appearing in Computer-Aided Filter Des&n. G. Szentirmai, Ed., IEEE Press, 1973.  ...  A Nonlinear Programming Approach to Optimal Design Centering, Tolerancing, and Tuning JOHN W. BANDLER, SENIOR MEMBER, IEEE, PETER C.  ... 
doi:10.1109/tcs.1976.1084191 fatcat:43dhhydvezagrbbnkhvftctgcq

Review of dimensioning and tolerancing: representation and processing

U. Roy, C.R. Liu, T.C. Woo
1991 Computer-Aided Design  
in computer-aided mechanical design.  ...  design computer-aided design Farmer, L E and Gladman, C A 'Tolerance technology -computer based analysis' ManuL Tech.  ... 
doi:10.1016/0010-4485(91)90045-x fatcat:bnolfpvr6fefzgqnhat74bszw4
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