Research On Cooling Mechanism And Chip Breaking Performance Of High Pressure Internal Cooling Turning Tool

304 stainless steel in harsh environments such as high,rotting candle has good comprehensive performance,so it is widely used in medical,aerospace,nuclear power,naval ship,such as high-tech fields,but the 304 stainless steel mechanical properties,physical properties are also greatly influenced its machinability,which brought a lot of inconvenience to the machining process.Scraps produced in the process of turning 304 stainless steel continuous,very difficult to deal with,so the chip if it is not very good control,let its winding on the tool or workpiece,or damage to the machined surface is likely to cut the workpiece has been cutting tool,parking in the process of processing chip might even hurt the staff.This paper through high pressure cooling conditions YG8 cemented carbide cutting tools in cutting simulation and experimental research of 304 stainless steel analysis under the condition of meet the cutting tool material strength,high pressure inside the cooling machining effect on the deformation of cutting temperature and tool,at the same time in the process ofthis chip curling broken mechanism and chip morphology change law were studied.Firstly,By studying the high pressure jet,the structure of the cutting tool used in this machining process,as well as the velocity and flow field of the high pressure jet were determined.Secondly,the cutting tool stress and cutting heat in the cutting process are studied theoretically,and the tool stress field and temperature field in the process of high pressure internal cooling cutting and dry cutting are simulated through COMSOL Multiphysics,so as to analyze the influence of high pressure internal cooling cutting technology on cutting temperature and tool service life.The research shows that the high pressure internal cooling turning tool can greatly reduce the cutting temperature of the tip in the process of turning 304 stainless steel under the condition that the cutting strength of the cutting tool material is satisfied,thus improving the service life of the turning tool.Then,the thermal deformation of the cutting tool in the process of cutting is studied theoretically,and the thermal deformation of the cutting tool in the process of high pressure internal cooling cutting and dry cutting is simulated through COMSOL Multiphysics,and the influence of high pressure internal cooling cutting technology on the tool deformation is analyzed.The results show that the thermal deformation of the turning tool produced by the high pressure internal cooling cutting is much smaller than that by the dry cutting in the metal cutting process.Therefore,high pressure internal cooling turning tool in theprocess of turning 304 stainless steel,can be very good to reduce the thermal deformation of turning tool,so that the workpiece processing accuracy has been effectively improved.Finally,the high pressure inside the cooling tool to study the mechanism of chip breaker,through AdvantEdge FEM process of high pressure inside the cooling cutting and dry cutting scraps breaking process simulation in the process of comparison,and through the experiment of high pressure cooling cutting and dry cutting chip inside,validate the cutting technology can be better for the chip broken;In addition,AdvantEdge FEM was used to compare the chip breaking effect of 45 o and 60 o high pressure internal cooling turning tool respectively.Research shows that: under different cutting parameter,cutting process of high pressure inside the cooling chip curling radius are far less than the radius of chip curling of dry cutting produce,shows that high pressure inside the cooling machining can effectively reduce the radius of chip curling,led chip increases the degree of bending,chip produced by bending strain increase,to achieve ultimate strain of material and then break off soon.And cutting fluid channel hole is 60 o high pressure internal cooling turning tool chip breaking effect than cutting fluid channel hole is 45 o high pressure internal cooling turning tool chip breaking effect is better,can be more effective and timely to make the chip quickly break.