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Effektivisering av genomloppstid inom termisk sprutning
Högskolan Väst, Institutionen för ingenjörsvetenskap, Avdelningen för Industriell ekonomi, Elektro- och Maskinteknik.
2018 (svensk)Independent thesis Basic level (professional degree), 10 poäng / 15 hpOppgaveAlternativ tittel
Throughput efficiency improvement in thermal spray process (engelsk)
Abstract [en]

The purpose of the thesis was to investigate possible ways to increase the throughput efficiency for a part that is thermally sprayed at GKN Aerospace in Trollhättan.

The goal of the project was to identify technical solutions that can reduce the lead time for the part by at least 40 % and to investigate improvements that could increase the efficiency for all the products that are coated at the department. The project was carried out because the part had one of the longest process times at the department due to a lot of handwork, masking, low-power spray gun and multiple machine stops during the spray operation. The process has been observed and employees have been interviewed to map the current state. Process documentation and part drawings have also been investigated to understand the requirements and ensure that the solutions are useful for the department. The time each activity took were mapped during the observations. Based on the recorded times histograms were made to investigate which moments are most time consuming and therefore needs to be improved. Through the interviews, observations and the benchmarking, solutions were found and further investigated and assessed to identify which ones are the most effective and implementable. Together with operators and technicians, the possible solutions were discussed for in terms of feasibility and improvements. The technicians also discussed the possible time reductions per activity that the proposed solutions are expected to entail when implemented. To achieve the goal, the masking needs to be changed as the masking tools cause the bouncing of coating on the tools and back on the gun, which makes necessary to stop the spraying process after each stroke. If the masking tools are redesigned, a five-hour deburring operation that is performed at another department can be eliminated.

The conclusion from this work is that it is possible to increase the process efficiency by 49.5% if the existing spray gun is used. If a higher-powered gun can be employed, it enables further efficiency improvement. The increased efficiency of the process makes it possible that the lead time can be shortened from seven days to four days as the part can be completed in the department.

sted, utgiver, år, opplag, sider
2018. , s. 52
HSV kategori
Identifikatorer
URN: urn:nbn:se:hv:diva-12422Lokal ID: EXM502OAI: oai:DiVA.org:hv-12422DiVA, id: diva2:1212897
Fag / kurs
Mechanical engineering
Utdanningsprogram
Maskiningenjör
Veileder
Examiner
Tilgjengelig fra: 2018-06-14 Laget: 2018-06-04 Sist oppdatert: 2018-06-14bibliografisk kontrollert

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