Usporedba metoda za analizu tolerancija

master's thesis

• Title (english): Comparative study of tolerance analysis methods
• Author: Petar Kosec
• Mentor: Stanko Škec (mentor)
• Granter: University of Zagreb; Faculty of Mechanical Engineering and Naval Architecture; Zagreb
• Defense date and country: 2019-12-06, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mechanical Engineering; General Mechanical Engineering (Construction)

Abstract

Tolerancijska analiza neophodna je u modernim proizvodnim procesima. Zbog toga postoji velik broj metoda za tolerancijsku analizu. Međutim, razlike u metodama često rezultiraju različitim rezultatima. Ovisno o vrsti problema, potrebno je odabrati odgovarajuću metodu za analizu. U radu je provedena usporedba četiri različite metode tolerancijske analize na dva primjera. Metode koje su se uspoređivale su: tablična Worst Case metoda, Monte Carlo simulacija, vector loop i unificirana Jacobian – torsor metoda. Svaka metoda detaljno je objašnjena i prikazani su koraci potrebni za provedbu svake metode. Rezultati su pokazali da je unificirana Jacobian - torsor metoda najopsežnija, ali također ima vrlo složen postupak. Monte Carlo simulacija pogodna je za analizu dijelova proizvedenih u velikim serijama, ponajviše zbog statističkog pristupa, dok su vector loop i tablična Worst Case analiza prikazali slične rezultate.

Abstract (english)

Tolerance analysis is indispensable in modern manufacturing processes. Thus, practitioners have many methods and tools at their disposal. Unfortunately, differences in methods often result in different outputs – depending on the problem, some of the methods may be more convenient than the others. A case study has been performed, aiming to compare the performances of four different tolerance analysis methods. Two assemblies were used to compare the tolerance chart analysis, Monte Carlo simulation, vector loop, and unified Jacobian-torsor method. Each method was explained in detail, and the steps needed to carry it out were shown. The results have shown that unified Jacobian – torsor method is the most comprehensive, but also has the most complex procedure. Monte Carlo simulation is suitable for analysis of parts produced in large series, mostly due to its statistical approach. Lastly, vector loop and tolerance chart analysis displayed similar results, with the former being suitable for solving 2D and 3D problems.

• Keywords: tolerancijska analiza; Computer-aided tolerancing (CAT) alati; unificirana Jacobian – torsor metoda; vector loop; Monte Carlo
• Keywords (english): Tolerance analysis; Computer-aided tolerancing (CAT) tools; Unified Jacobian-torsor method; vector loop; Monte Carlo.
• Language: croatian
• URN:NBN: urn:nbn:hr:235:343374
• Study programme: Title: Mechanical Engineering; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka strojarstva (magistar/magistra inženjer/inženjerka strojarstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access; Embargo expiration date: 2021-11-28
• Created on: 2019-11-28 10:39:03