Influence Of Micro Texture On The Dry Turning Performance Of PCBN Tool

Polycrystalline cubic boron nitride(PCBN)tools have excellent cutting properties and can be used to cut hard materials such as high hardness.However,with the improvement of cutting tool's performance requirements in the cutting industry,ordinary PCBN tools are still difficult to meet the requirements.In order to improve the cutting performance of PCBN tools,this paper will use multiple micro texture methods on PCBN cutting tools.The effect of micro texture on the dry turning performance of PCBN tools was studied by using the finite element simulation technique and combining the cutting test.Initially,effect,that is cutting speed on the cutting performance of PCBN tool,is studied by controlling variables under condition of certain feed rate and cutting depth.Comprehensively considering two aspects of cutting force and the surface quality,the low cutting force,low surface roughness are selected as the simulation data to study the effect of micro texture on cutting force and surface quality under optimal cutting conditions.Then the micro texture PCBN tool and the workpiece material GCr15 are modeled by the finite element simulation technology.Three micro textures designed on rake face,including microgrooves parallel to the cutting edge,microgrooves perpendicular to the cutting edge,and micro pits,which are used to study the effect of different types of micro texture on the cutting force and the surface quality of the workpiece during the cutting process.Based on the analysis of theory,laser technology is used to make micro texture processing of PCBN tool rake face.The cutting test is carried out on micro texture tools,and the cutting results are compared with the simulation cutting test results.Simulation and cutting test results show: compared with the non-micro texture PCBN tool,the cutting force produced by micro texture cutting tool is smaller,and the surface quality is better;the workpiece cut by micro texture cutting tools have small surface stress and low surface roughness,which shows that micro texture plays an active role in improving the cutting performance of PCBN tools.