合成樹脂の切削における工具摩耗について

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タイトル別名
  • On the Tool Wear in Cutting of Plastics
  • ゴウセイ ジュシ ノ セッサク ニ オケル コウグ マモウ ニ ツイテ

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In this paper, an elemental study related to the selection of tool materials used to cut plastics is discussed, the tool wears caused by cutting of plastics by High-Speed-Steel tool and some kind of carbide tools are discribed. From these studies, Some effects of cutting conditions upon the tool wear and the kind of tool materials most suitable for cutting plastics are made clear. Some experimental results obtained are as follows : (1) In cutting of Phenol Resin, hard PVC Resin and Nylon, the flank wear of the HSS-Tool is more remarkable than that of the carbide tool. (2) As for cutting of plastics by the carbide tool, P-Class (marked ISO) is suitable for ductile materials and K-Class is suitable for brittle materials, respectively. (3) Referring to the cutting mechanism of plastics, the carbide tool of P-Class is usefull for a flow-type cutting and that of K-Class is usefull for a shear or crack type cutting, as observed in cutting of metals. (4) The flank wear of tool is more remarkable in cutting of plastics which show an intermittent cutting phenomenon like Phenol Resin than in cutting of plastics like hard PVC Resin and Nylon, hereupon the former is formed in laminae by fibers but the latters have no laminae. (5) Both the cutting ratio and the shear angle of plastics are larger than those of metals.

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