With the failure of diamond coated cutting tools , built - up edge ( bue ) develops , and cutting force on the tool jumps immediately . so the failure is predictable by monitoring the devolop of bue and change of cutting force 切削过程中刀具金刚石薄膜失效时,会产生积屑瘤,且切削力骤然增大,通过监测积屑瘤的产生和切削力的变化,可以预报金刚石薄膜涂层刀具的失效。