本文从刀片槽型结构出发,通过调节刃带宽度和刀具前角设计四款不同槽型刀片,对GH4169进行车削试验.通过测力仪(Kistler 5070)测量刀片切削力和超景深显微镜(Easson)观察刀具的磨损形貌,分析刀片的受力曲线和磨损曲线.试验表明:切削速度在45～85 m/min范围内,随着切削速度的增加,不同槽型刀片切削力都是先增大后减小;相同参数条件下,刀片槽型前角越大,剪切变形减小,受力越小;切削速度较低时,3°～15°前角范围内,刀具刃口强度好的刀片寿命好;切削速度较高时,通过增大第一前角和切削刃强度有助于提高刀具寿命;切削速度45 m/min时,刃口强度好的SNR1槽型切削寿命好;切削速度65 m/min,槽型最锋利且有加强筋强化切削刃的SNR4槽型切削寿命好;切削速度85 m/min,刃口强度和前角都较大的SNR2槽型切削寿命好.在本文切削速度范围内,SNR2能较好的满足使用要求.
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