進水用獸脂塗抹厚さ決定に関する一考察

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In spite of the recent introduction of launching by ball method, it is prevalent that a great number of shipyards still adopt launching by tallow method, because of its relatively stable faculty as lubrication and the easiness in handling. While there have been published many results of experiment concerning the lubrication faculty of tallow, only few attempts were made for the study and experiments of coating thickness of tallow which is one of the factors closely related to the economy and safety of the use of tallow. Such thickness is determined solely based on the tradition of each company.From the analysis of past launching data in Kawasaki Dockyard Company, Ltd., as well as from numerous experiments, the authors have succeeded in determining the thickness of tallow which is satisfactory from the view points of both experiment and theory.By the use of these diagrams and formula, thickness of tallow required for launching will be determined from the minimum thickness required at each part of launching way multiplied by adequate safety factor. These diagrams and formula are based on the following factors.1. Load 2. Temperature 3. Quality of tallow 4. Friction's loss 5. Lubricant 6. Roughness of coating surface The result of thickness thus obtained has safely attained considerable economy in the amount of tallow.Actual application method of tallow, as well as the result of experiment, is detailed below.
社団法人日本船舶海洋工学会の論文

進水用獸脂塗抹厚さ決定に関する一考察

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