超硬金型の自動ラッピングシステムにおけるラップ剤の最適化とその評価(機械要素,潤滑,工作,生産管理など)

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Recently the dies with cemented carbide are used for many products using its high stiffness and high wear resistance. The hand lapping is even now used as finishing process of them because of difficulty of its mechanization. The new lapping system was developed in our previous study from these reasons. And the lapping system could machine to flat surface of cemented carbide (V10) with mirror-like surface. In that case, mixture of diluted starch syrup and diamond grain was used as lapping slurry. However, this slurry can machine only flat bottom surface because of dropping the grain for lapping. So, it has to improve for the lapping to three dimensional work pieces including vertical surface, concave-convex surface. In this study, the mixture of polymer material and diamond grain was used as new lapping slurry for suspending the diamond grain using special properties of polymer. The distribution density of grain in the slurry medium was researched by experiment. Relationship between the lapping condition and the grain retention propaties on tool head was researched. Finally improving the surface roughness of large work piece was confirmed. It is concluded from the results that; (1) New lapping slurry with polymer can keep the diamond grain while enough time for machining. (2) The best lapping condition was confirmed from TAGUCHI methods and experiment. (3) New lapping slurry can be used for lapping the mirror-like surface of large or complex dies.
2009-01-25

超硬金型の自動ラッピングシステムにおけるラップ剤の最適化とその評価(機械要素,潤滑,工作,生産管理など)

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