Mogućnost predviđanja kvalitete namještaja trodimenzionalnim modeliranjem u CAD programu Inventor

undergraduate thesis

• Title (english): The possibility of predicting the quality of furniture by three-dimensional modeling in the Inventor CAD program
• Author: Petar Konsa
• Mentor: Silvana Prekrat (mentor)
• Granter: University of Zagreb; Faculty of Forestry and Wood Technology; Zagreb
• Defense date and country: 2023-09-01, Croatia
• Scientific / art field, discipline and subdiscipline: BIOTECHNICAL SCIENCES; Wood Technology; Construction and Design of Wood Products

Abstract

Problematika koju rad proučava proizlazi iz prilagodbe novim tehnologijama i novim tržišnim nastojanjima finalne obrade unutar drvnotehnološke industrije. U fokusu rada nalazi se predviđanje karakteristika oblikovnog rješenja prije njegove stvarne izrade, metodom konačnih elemenata, podržane programom za 2D crtanje i 3D modeliranje Inventor. Rad je za cilj imao utvrditi programske mogućnosti primjene unutar procesa plasiranja proizvoda u fazu proizvodnje. Kao podlogu za ispitivanje rad objedinjuje mehaničke zakonitosti deformabilnih tijela unutar statičkog ispitivanja provedenog prema važećoj normi za ispitivanje stolice, odnosno konkretno riječ je o normi: HRN EN 1728:2012 – Namještaj – Namještaj za sjedenje – metode ispitivanja za određivanje čvrstoće i trajnosti, u odnosu na odabrane materijale i dimenzije proizvoda, odnosno obzirom na oblikovno riješenje. Rad se također bavi analizom dobivenih rezultata i prilagodbom istih u odnosu na dimenzioniranje i izbor materijala izrade. Na navedenom primjeru modeliranja stolice s metalnim nožištem dokazana je mogućnost predviđanja kvalitete namještaja trodimenzionalnim modeliranjem u CAD programu Inventor. Definiranjem materijala za nožište u ovome slučaju, izabranog kromiranog čelika i materijala za sjedalo i naslon za koje je odabrano drvo hrasta na modelu, utvrđena je masa stolice koja iznosi 6,29.kg. Program nudi i promatranje položaja težišta stolice što daje idealan uvid i direktno je povezano sa njezinom stabilnošću. Za prvo predloženi promjer cijevi nožišta od 20 mm utvrđena je nedopuštena deformacija u smjeru osi z od 52,5238 koja je promjenom promjera od 40 mm smanjena na dopuštenu 23,5365 mm. Ova simulacija spriječila je izradu prototipa koji sigurno nebi zadovoljio ispitivanje, skraćeno je vrijeme do proizvodnje proizvoda željene kvalitete u ranoj fazi projektiranja.

Abstract (english)

The research addresses the challenges arising from the adaptation to new technologies and market demands in the final processing within the wood technology industry. The primary focus of the study is on the predictive analysis of the design characteristics before its actual production using the finite element method, supported by the 2D drafting and 3D modeling software Inventor. The objective of the study was to assess the software's capabilities in product development and manufacturing. The research integrates the mechanical properties of deformable bodies in static testing conducted in accordance with the applicable standard for chair testing, specifically the norm: HRN EN 1728:2012 - Furniture - Seating - Test methods for the determination of strength and durability concerning chosen materials and product dimensions, with consideration of the design concept. The study also involves analyzing the obtained results and adjusting them in terms of sizing and material selection. Through the example of modeling a chair with a metal frame, the feasibility of predicting furniture quality using three-dimensional modeling in CAD program Inventor is demonstrated. By specifying materials for the frame, in this case, chrome-plated steel, and materials for the seat and backrest, oak wood in the model, the weight of the chair is determined to be 6.29 kg. The program also allows examining the chair's center of gravity, providing valuable insights directly related to its stability.Initially proposed with a 20 mm diameter, the frame's tube exhibited an unacceptable deformation of 52.5238 mm the z-axis. However, by changing the diameter to 40 mm, the deformation reduced to an acceptable 23.5365 mm. This simulation prevented the production of a prototype that would not have passed testing, significantly reducing the time required to develop a product of desired quality during the early design stage.

• Keywords: Inventor; 2D crtanje; 3D modeliranje; metoda konačnih elemenata; kvaliteta
• Keywords (english): Inventor; 2D drawing; 3D modeling; finite element method; quality
• Language: croatian
• URN:NBN: urn:nbn:hr:108:657340
• Study programme: Title: Wood Technology; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka drvne tehnologije (sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka drvne tehnologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Access restricted to students and staff of home institution
• Created on: 2023-08-30 06:14:04