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.