Study On Properties Of Dry Cutting Titanium Alloy Of Laser Micro-grooved Texture PCBN Tool

At this stage,with the continuous improvement of industrial production requirement,the performance requirement for the material itself are becoming more and more stringent.Titanium alloys are widely used due to their superior performance such as greater specific strength,higher corrosion resistance,and lower thermal conductivity.It has been applied in aerospace engineering,chemical medicine and other fields.It is precisely because of these characteristics that the processing of titanium alloys is more difficult,so the processing of titanium alloys is an important research direction at present.The birth of surface micro-texturing technology provides a feasibility for improving the processing performance of titanium alloys.Numerous studies have concluded that the placement of micro-texture on the tool surface can reduce the contact area between the tool and the chips,alleviate the friction between them,reduce surface wear,and improve the cutting performance of the tool.In this paper,a micro-groove PCBN tool cutting TC4 titanium alloy experiment was carried out to study the influence of the size parameters of the micro-groove on the cutting performance of the tool:(1)The micro-grooves on the tool surface are designed by selecting the width,spacing,distance from the edge of the cutting edge,and depth of the micro-grooves.During the test,a laser marking machine was used to fabricate micro-grooves on the surface of the tool,and various parameters of the laser during the machining process were studied,and appropriate parameters were selected to process the micro-groove tool that meets the requirements of the cutting test.(2)Carry out the finite element simulation test of micro-groove PCBN tool cutting TC4 titanium alloy.In the simulation process,the cutting force and temperature of the tool were processed and analyzed,and the influence of micro-groove parameters on the cutting performance of the tool was studied.It is concluded that suitable tool surface microgrooves can reduce the cutting force and temperature of the tool.(3)The dry-cutting test of TC4 titanium alloy with ordinary non-textured PCBN tools was carried out.And it was concluded that among the three elements of the cutting parameters of the tool,the cutting speed has the smallest effect on the cutting force of the tool,and the largest is the depth of cut,and its influence is far greater.The smallest impact on the surface quality of the processed TC4 titanium alloy is the depth of cut,and the largest is the feed rate.Appropriate micro-grooves can reduce the force in the cutting process and improve the machining performance.The impact on the cutting force from large to small is micro-groove spacing,micro-groove depth,micro-groove width,and distance between micro-grooves and cutting edge edge.The greatest impact on the quality of the processed surface of titanium alloy is the distance between the micro groove and the edge of the cutting edge.A relatively moderate edge distance can not only reduce the impact on the strength of the tool,but also ease the friction on the contact surface of the tool and the chip,thereby improving the quality of the processed surface of the workpiece.This paper mainly studies the effect of the placement of the micro-groove texture on the rake face of PCBN tools on the cutting performance of the tool when processing TC4 titanium alloy.Through finite element simulation and cutting machining tests,it is shown that a suitable tool rake face micro-groove can reduce the contact area between the tool and the chip,alleviate the friction between them,reduce the wear of the tool,and improve its cutting performance.The completion of this article provides ideas research on the influence of the micro-texture size parameters of the tool rake face on the cutting performance of the tool.