Influencing characteristic of submicroscopic chamfering cutting edge on the cutting property of cemented carbide insert

In order to study the action mechanism of micro cutting edge form of carbide insert on the cutting performance, aiming at the problems of tipping and brittle fracture of carbide insert during interrupted cutting, interrupted cutting experiments are carried out using two different grades of cemented carbide indexable inserts under the condition of multiple submicroscopic structures of cutting edge.The three dimensional stress analyzer and high-speed camera are used to data monitoring and collection of impact and cutting force in the cutting process.Then the strengthening effect mechanism of the micro chamfering edge on the cemented carbide insert is researched combining with graphic statistical analysis method with the goal of revealing the influence rule of cutting edge geometry parameters on the blade life, proposing the curvilinear relationship between chamfering edge parameters and feed rate.The results prove that the larger critical angle β_C, chamfer angle β and the smaller chamfering width L should be selected under the condition of large feed rate f.Conversely, the smaller critical angle β_C, chamfer angle β and the larger chamfering width L have better performance under the small feed rate f.The results can provide data and technical support for the strengthening design of cemented carbide indexable insert.