Utveckling av snabbfäste och verktyg för byte av sågklinga

Sammanfattning: This thesis is based upon the work done at Westinghouse electric company (WEC)in Västerås during the spring semester of 2015 and describes the development of a quick coupler with associated blade changing tool. These are meant to be used together with a sawing tool that the company uses for the dismantling of nuclear reactors, which is performed under water. The aim of the thesis was to develop a complete manufacturing documentation with drawings and related CAD models which Westinghouse later can use to manufacture the tool and the quick coupler. It was also included in the assignment to, if necessary, modify parts of the saw tool to adapt these to the intended blade changing tool. A number of visits to the company's workshop was made during the time to study the saw that the thesis is based upon. The purpose of these visits was to get a better idea of the dimensions, construction and the field of use of the saw. On three of those occasions various engineers and consultants accompanied us to discuss possible problems with different ideas. This was interspersed with information in the form of literature studies on quick couplers to create a clearer picture of the nature of the task. When enough information had been gathered a functional analysis was made to divide the main problem into sub this phase the idea and concept generating process took place. The methods used for this was mainly brain writing and brainstorming. When enough ideas and concepts had been generated the most promising ideas was selected by using an evaluation matrix, in which the various suggestions were weighted against the parameters that our supervisor thought mattered the most. The next step was to create a computer model of the best concept and finding suitable components in worm gear, electric motor, planetary gears, screws, etc. During the modeling phase further developed of the concept was made until the tool and quick coupler received its final shape whereupon the manufacturing documentation was created.