Fixturutveckling
Utveckling och konstruktion av fixtur förskärande bearbetning
This thesis has been performed at International Aluminum Casting AB in Eskilstuna,Sweden.International Aluminum Casting is currently working with a number of improvementsin their production in order to achieve their vision of being the leading aluminum foundry in Sweden. As a step in their improvement efforts, focus was directed ondeveloping the company's fixtures for machining.Efforts were focused on two main objectives: to develop a complete proposal on afixture which leads to a more rational use of an assigned part and also form general design advice for development of fixtures in the future.During the work progress, discussions have been made with experts at International Aluminum Casting within the field of fixture design. The objective was to obtain sufficient knowledge about the underlying problems with the current fixture for the part. At this stage of the thesis, a number of essential criteria for fixture design were produced. Information and inspiration were obtained by examining the company?s currently developed fixtures.After gathering the necessary information the process of developing three different fixture concepts started. In order to produce these three drafts a couple of tools to form concepts where used and in that brainstorming played a crucial role. To determine which of these concepts who had the greatest potential the PUGH-method where used and the best concept could be determined. The starting point to develop the best concept was based on the criteria previously mentioned for designing fixtures.The result of this thesis became a fixture which has a capacity to fit six details instead of the previous four, which gives it an advantage from a manufacturing standpoint. The developed fixture has also enabled a faster production time for the part itself because the machine movements in the manufacturing process have been reduced. These movements manifest itself most clearly in tool changes and rotations of the fixture in the machining process. A shorter processing time resulting in reduced manufacturing costs. The fastening features of the part in the fixture have been improved, resulting in a simpler and a better work environment for the operator.