Uporaba A3 metodologije za strukturirano reševanje težav na primeru krivljenja robu pokrovne plošče zračne vzmeti

Janhar, Žiga (author), Oman, Simon (mentor), Nagode, Marko (comentor)

Pri proizvodnji zračnih vzmeti v procesu sestavljanja občasno nastane odpadek, ker med krivljenjem roba pokrovne plošče okrog noge gumenega meha pride do neenakomernega zaviha po obsegu pokrovne plošče in jedro v določenem delu zgreši zavih. S pomočjo A3 metodologije za strukturirano reševanje težav smo obravnavali omenjeni proces in iskali vzroke za nastanek napake, ki vodi v odpadek. S pomočjo analize smo ugotovili, da gre v osnovi za dva tipa napake, kjer je prvi posledica napake v predhodni operaciji, drugi pa je posledica raztegovanja jedra. Prvega smo odpravili tako, da smo spremenili navodila za delo v predhodni operaciji, medtem ko smo drugega opravili tako, da smo spremenili orodje za krivljenje roba pokrovne plošče. S spremembo orodja se je spremenil profil zaviha, kar je odpravilo težavo z raztegovanjem jedra. S pomočjo teh sprememb smo v celoti odpravili omenjeni odpadek.

• Language: Slovenian
• Keywords: zračne vzmeti, krivljeni dizajn, A3 metodologija, strukturirano reševanje težav, orodje za krivljenje, gumeni mehi
• Work type: Bachelor thesis/paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: FS - Faculty of Mechanical Engineering
• Place of publishing: Ljubljana
• Publisher: [Ž. Janhar]
• Year: 2023
• Number of pages: XII, 52 f.
• PID: 20.500.12556/RUL-148259
• UDC: 62-272.84:621.7(043.2)
• COBISS.SI-ID: 162754307
• Publication date in RUL: 08.08.2023

Secondary language

• Language: English
• Title: Use of A3 methodology for structured problem solving on example of air spring bead plate edge bending

Abstract

During the production of air spring assembly process, bead plate edge banding process around bead area of rubber flex member, scrap can sometimes occur. This can happen when bead plate does not have even shape of crimp around the circumference of bead plate and in one area bead misses crimp. The problem was addressed with A3 methodology for structured problem solving which enables detection of root cause for error leading into scrap. With help of analysis we identified two types of error, the first type is a consequence of predeceasing production step and the second type is caused by stretching the bead. We eliminated the first type with a change of work instruction on the predeceasing production step, while the second type was resolved by changing the crimping tooling for edge bending of bead plate. Adjustment of tooling resulted in changed profile of crimp and eliminated the problem with stretching the bead. With mentioned modifications we managed to completely eliminate above mentioned scrap.

• Keywords: air springs, crimped design, A3 methodology, structured problem solving, crimping tooling, rubber flex members