Search Results

Since changes in market trends occur faster compared to the past and the market itself has become extremely diversified, the production line in plants needs to feature higher levels of flexibility and agility. To achieve goals, one possible option is the use of a single-spindle ultra-high-speed machine with a parallel link mechanism, which would substitute the conventional multi-spindle machine. Multi-spindle-type machinery has been widely used in aluminum component machining/transferring facilities, including, among others, those for cylinder blocks and cylinder heads. To ensure the required production line flexibility, it is necessary to modify the machinery to minimize the investment and lead time for new model production. This paper reports on the background, target and structure of parallel link-type machinery.

A new chemical process of forming a non-corrosive flux for aluminum brazing has been investigated. The flux is built up onto an aluminum surface in a layer form, which consists of K2AlF5·H2O or K2AlF5-H2O/Zn codeposition. The K2AlF5-H2O layer formed through a chemical reaction between the aluminum metal and an aqueous treating solution gives a good adherency to the substrate and acts as the flux for brazing. The codeposition flux has an advantage of eliminating a pre-zincplating for sacrificial corrosion, since a Zn diffusion layer is formed on the aluminum surface at the brazing process.