Evaluation of finished surface of cemented carbide by direct cutting using diamond-coated carbide end mill
Evaluation of finished surface of cemented carbide by direct cutting using diamond-coated carbide end mill
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DOI：
10.1016/j.procir.2018.08.234
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
Masato Okada;R. Suzuki;A. Kondo;Hidehito Watanabe;T. Miura;M. Otsu
中科院分区：
文献类型：
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作者：
Masato Okada;R. Suzuki;A. Kondo;Hidehito Watanabe;T. Miura;M. Otsu
本研究主要探讨硬质合金之精加工表面，以金刚石涂层硬质合金立铣刀直接切削硬质合金。使用金刚石涂层硬质合金立铣刀在超小进给速度下直接切削硬质合金时，可实现出色的切削性能。成品表面的质量主要根据表面外观、轮廓和横向断裂强度进行评价。还对通过电火花加工和机械抛光获得的成品表面进行了评价，以比较表面质量。使用WC-Co复合硬质合金材料（CIS VC-70）作为工件，按照CIS 026 B进行横向断裂强度试验。通过直接切削和机械抛光获得的加工表面显示为镜面。在通过直接切削获得的精加工表面上观察到的WC晶粒的尺寸小于在切削过程之前工件的平均晶粒尺寸。与机械抛光相比，通过直接切削获得的成品表面上的微小不均匀性是明显的。三种加工方法中，直接切削加工的工件横向断裂强度最高。
This study investigates the finished surface of cemented carbide obtained by direct cutting with a diamond-coated carbide end mill. Excellent cutting performance in the direct cutting of cemented carbide can be achieved using a diamond-coated carbide end mill under ultrasmall feed rates. The quality of the finished surface was primarily evaluated in terms of surface appearance, profile, and transverse rupture strength. The finished surfaces obtained by electric discharge machining and mechanical polishing were also evaluated to compare the surface quality. A WC-Co composite cemented carbide material (CIS VC-70) was used as the workpiece, and the transverse rupture strength test was conducted according to the CIS 026B. The finished surfaces obtained by direct cutting and mechanical polishing were shown as mirror surface. The size of the WC grain observed on the finished surface obtained by direct cutting was smaller than the mean grain size of the workpiece before the cutting process. Minute unevenness was conspicuous on the finished surface obtained by direct cutting when compared with that by mechanical polishing. The transverse rupture strength of the workpiece finished by direct cutting was the highest in the three types of processing method.