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Projects / Programmes source: ARIS

Computer Aided Insole Design and Manufacturing

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Research activity

Code Science Field Subfield
2.11.00  Engineering sciences and technologies  Mechanical design   

Code Science Field
T111  Technological sciences  Imaging, image processing 
Keywords
insole, surface, prototype, computer program, scanning, milling, database
Evaluation (rules)
source: COBISS
Evaluation of bibliographic research performance indicators according to ARIS methodology
Citations Citations for bibliographic records in COBIB.SI that are linked to records in citation databases
source: WoS source: Scopus source: COBISS
Researchers (10)
no. Code Name and surname Research area Role Period No. of publications
1.  20863  PhD Tomaž Berlec  Manufacturing technologies and systems  Researcher  2008  351 
2.  02859  PhD Jože Duhovnik  Mechanical design  Researcher  2007 - 2009  1,027 
3.  21238  PhD Matija Jezeršek  Manufacturing technologies and systems  Researcher  2007 - 2010  375 
4.  28200  Matej Jurca  Economics  Researcher  2007 - 2010  0 
5.  14128  PhD Tomaž Kolšek  Mechanical design  Head  2007 - 2010  66 
6.  12725  PhD Leon Kos  Mechanical design  Researcher  2008 - 2010  249 
7.  12558  Robert Križnar  Manufacturing technologies and systems  Researcher  2007 - 2010  11 
8.  30539  Tanja Mavrič Rušt    Technical associate  2009 - 2010  0 
9.  25057  MSc Igor Zupan  Manufacturing technologies and systems  Researcher  2007 - 2010  5 
10.  10978  PhD Roman Žavbi  Mechanical design  Researcher  2007 - 2009  190 
Organisations (2)
no. Code Research organisation City Registration number No. of publications
1.  0782  University of Ljubljana, Faculty of Mechanical Engineering  Ljubljana  1627031  29,223 
2.  1664  ALPINA, shoe factory, d.o.o.  Žiri  5034728  36 
Abstract
The preparation of the shoe lasts for shoe mass production is a procedure, which traditionally requires a lot of hand skills and experience. The procedure starts with the initial prototype shoe last, which is later scaled, multiplied and reworked to obtain graded shoe lasts containing a mechanism to be dissassembled. The manufacturing of an initial shoe last shape is time consuming , dependent on skills and experience of an individual. Besides, the changes to the shape with respect to previous shoe last models are not trackable. In addition, using current technologies for scaling and multiplication of the lasts on specialized milling machines causes considerable differences in shape and dimensions with respect to initial model. As a consequence, the complementary shoe parts (the sole, insole and leather parts) have troubles fitting together, causing delays in mass production. In the project proposal we intend to reduce the described problems in a systematic way using innovative scientific approach. The project will introduce the ability to describe and track the shapes with advanced computer tools. We will scan the existing materialized shoe lasts and consequently analyze them by means of shape parameters. A comprehensive database will be assembled, where a user will be able to quickly browse through related shapes and extract the most convenient to use as a basis for new shoe model. The project will result in the computer tools, which will import and export standard shape computer data formats and enable interactive 3D visualization and interaction. Non-standard functions will be implemented, such as extraction of shoe last technological edge and other extraction of curved shapes, important for technological process. There are no such solutions available in current commercially available equipment. The project will finally result in a transfer of the prototype shapes from a computer model to materialized shape on a specially designed rapid prototyping milling machine, where high accuracy is expected.
Significance for science
The research of complex geometrical shapes and thir description with a small number of parameters is relevant from scientific point of view, however, the number of relevant work is low. There are no correlations between several characteristical dimensions and transformation to smooth surfaces. One can even buy a feet shape or last shape database , but no model exist to match one shape to another. Our research also includes sharp edge detection and object orientation recognition. We have shown on industrial 3D model examples, that it is possible to design consistent data models, which can describe complex shapes with a small number of parameters. The precision is sufficient for industrial application. We employed new methods for measuring the shoe inner dimensions, which enables new assessment of foot-last fit. Until now, only feet were measured.
Significance for the country
The increased added value is very important when observing any industrial production process. It is obvious, that production of such products is desired, which are truly result of proprietary development, based on usage of innovative algorithms. The keeping of work positions and jobs and opening of new ones is based on an assumption, that company sends such products on the market, which have competitive advantages in speed of production, engineering design, perfection of technology and ecological acceptance. For an industrial partner ALPINA, who holds more than 700 jobs is this of crucial importance.
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