超硬合金在使用上具有高強度高硬度耐磨耗的表現，非常適合作為模具刀具。但其製造過程卻也因為其特性變得相當困難，因此在本研究中，針對加工超硬合金的方法，磨削加工，且針對超硬合金材料中具有代表性之材料，碳化鎢，進行研究。
磨削加工超硬合金材料在長年研究中加入超聲輔助已證明對其材料移除率的提升、磨削力下降及砂輪磨耗等表現都有良好的結果。本研究進一步針對超聲輔助的頻率差異進行實驗，且使用碳化鎢作為實驗對象，實驗以材料移除率、表面粗糙度、磨削力、比磨削能及工件的表面狀況作為判斷依據。最後根據磨削效能及磨削參數之關係，了解頻率對於超聲輔助磨削加工的影響，藉以在未來可選擇適當頻率加工難削材。

Cemented Carbide is a hard material with great strength, hardness and wear resistance as a cutting tool and mold. However, the process of manufacturing has become quite difficult because of its characteristics. Therefore, grinding tungsten carbide which is one of the Cemented Carbide were studied in this thesis.
Ultrasonic Assisted Grinding(UAG) has been verified that it can be used to grind hard materials such as Cemented Carbide efficiently. In this thesis, the frequencies of the ultrasonic assisted grinding were further tested by using the Tungsten Carbide as the experimental object. The experiment was based on material removal rate, surface roughness, grinding force, specific grinding energy and surface condition of the workpiece. Finally, the influence of frequencies on ultrasonic assisted grinding is understood according to the relationship between the result of grinding experiments and the parameters of the experiments so that the appropriate frequency dealing with Cemented Carbide such as tungsten carbide will be selected in the future.

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