Ställtidsreducering med SMED-metoden vid Duroc Special Steel

• Main Author: Bergquist, Mattias
• Format: Bachelor Thesis
• Language: Swedish
• Published: 2011
• Subjects: Technology; Teknik; SMED; ställtid; omställningsarbete; participation; flaskhals; Luleå
• Online Access: http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-55688

Duroc Special Steel is a so called re-roller operation and is located within SSAB:s industrial area in Luleå. The production includes rolling, annealing and slitting of warm and cold rolled metal strips in customized sizes. Along with 17 other companies Duroc Special Steel represents the Duroc group. The company has recently found that the slitting lines set up time is far too long considering the current state of production. In some cases the slitting line becomes a bottleneck operation. This occurs when the employees do not have enough time to finish a set up before the new product is ready to be produced. Therefore a study is needed to examine what can be done to shorten the set up time and also improve the building operation of the slitting tools, which is the main part of the set work. As a result, this thesis has been developed based on these two main problems; set up time and building slitting tools. The goal of this master thesis is therefore to demonstrate the ability to shorten set up times, improve set work and its work practices and also give solutions as to how this can be accomplished. The project’s primary implementation is based on a literature study consisting mainly of the SMED method, but also set up time and workers participation. Additionally during the project SMED has been the prinicipal tool for the task at hand and has therefore had a significant role in the work. Workers participation, in the form of completed workshops, has also been of great importance to the project. The literature study was used to anchor the implementation of the project and its ideas to achieve a result with credibility. A specification of demands was made containing criteria of what the solutions would bring and result in. It was later used in the project’s final stage to evaluate the different solutions and ideas. The problem solving of this master thesis has resulted in several proposals of what can be done to shorten the set up time, reduce the risk of bottleneck operations, improve set work and the building ...