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Fixtur till 30k TEC: Konceptframtagning
University West, Department of Engineering Science, Division of Industrial Engineering and Management, Electrical- and Mechanical Engineering.
2019 (Swedish)Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesisAlternative title
30k TEC fixture : Concept development (English)
Abstract [sv]

Tillverkningen av 30k TEC, ingående komponent i Pratt & Whitney´s PW1000 motor, medför problem. Materialets höga hållfasthet i kombination med detaljens komplexa geometri försvårar fastspänning av detaljen i tillverkningsfixturen. Detaljen bearbetas med skärande bearbetning vars höga värmeutveckling ger upphov till geometriförändringar av detaljen. Från geometriändringarna uppstår vibrationer mellan skärverktyget och detaljen vilket förkortar verktygslivslängd och försämrad slutresultatet. I rapporten undersöks metoder för att förbättra tillverkningsprocessen av 30k TEC genom framtagning av en ny tillverkningsfixtur. Arbetet omfattar insamling av kundkrav, fastställning av målspecifikationer och slutligen konceptgenerering med följande konceptval.

Arbetet resulterade i ett koncept av en tillverkningsfixtur vilket i teorin kan bidra till att förbättra tillverkningsprocessen. Detaljen fixtureras med hjälp av pneumatik i fixturen och detaljens geometriförändringar kompenseras med ett stöd som utnyttjar vakuum. För att fastställa om fixturen uppnått målspecifikationerna och förbättrar tillverkningsprocessen behövs konceptet eller delar av det testas i praktiken.

Abstract [en]

This report regards the manufacturing process of 30K TEC, an ingoing part to the PW1000 engine from Pratt & Whitney. The complexity of the parts geometry and the material makes for a problematic manufacturing process. The part is strapped down into a milling fixture which holds the part in place. The part is then machined with a cutting process to it final geometry. The process produces a high temperature on both the tool and part which leads to a geometry change in the part. Due to the geometry changes vibrations occur and affects the result on the part with poor surface and shortened tool life. In this report a concept is established for a milling fixture that accounts for the manufacturing aspects named above. The report and work follow the general concept development process from establishing the customer´s needs to generating concepts and selecting the final concept.

The work resulted in a concept for a fixture witch in theory meets the customer´s needs and favors the process. The fixture holds the part down with help of pneumatics and controls the geometry changes with vacuum to prevent vibrations. To evaluate if the fixture achieves the established target specifications further work is needed. The fixture or parts of it needs testing in practice before the result can be fully evaluated.

Place, publisher, year, edition, pages
2019. , p. 36
Keywords [en]
30k TEC, PW1000, engine part, manufacturing process, concept
Keywords [sv]
30k TEC, PW1000, motorkomponent, tillverkningsprocess, koncept
National Category
Mechanical Engineering
Identifiers
URN: urn:nbn:se:hv:diva-14390Local ID: EXM502OAI: oai:DiVA.org:hv-14390DiVA, id: diva2:1349519
Subject / course
Mechanical engineering
Educational program
Maskiningenjör
Supervisors
Examiners
Available from: 2019-09-09 Created: 2019-09-09 Last updated: 2019-09-09Bibliographically approved

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