Study On Simulation Analysis Of Micro Heat Pipe Groove Ploughing-Tension Forming And Cutter Optimization

With the improvement of the speed and machining accuracy of mechanical equipment,the proportion of manufacturing error caused by thermal deformation of machine tool is increased.Heavy-duty CNC machine tools are of great quality and inertia and the driving system requires more power,cause the part heating is more serious and the thermal error is more obvious,the conventional thermal error compensation method and the air forced convection and other machine cooling technology have been unable to meet the requirements.In consideration of convenience,reliability and low cost,the heat transfer method is used for the heat transfer of microgroove heat pipe with several orders of magnitude higher than aluminum or copper.In this paper,the core component of micro-groove capillary of micro-groove is affected rby the heat transfer capability,the core components that affect the heat transfer ability of micro-heat pipe are microgroove capillary core structure.This paper presents a new method for the forming of a plough-pulsed microgroove.It use the multi-tooth core head as the forming tool,the wing structure can be formed between the grooves in the inner wall of the heat pipe,which can significantly improve the heat transfer performance of the heat pipe.Aiming at the problem of thermal error of heavy CNC machine tool,select micro-channel heat pipe heat transfer mode and according to the characteristics of the suction core structure,the new micro-groove forming method is proposed,the numerical simulation of micro-groove forming process was carried out by finite element method,the research is carried out from the following three aspects.Firstly,based on the characteristics of the forming process of the plough-pulsed microgroove,refer to the advantages of cutting extrusion,considering the material physical properties of metal and tool metals of micro heat pipe workpiece,the cutter is designed for the forming of multi-tooth core head.The design of this tool is mainly from two aspects:one is the design of single-tooth tool in multi-tooth core cutter,the other is considering the structure of the equipment of the plough-pulsed micro-groove forming device,the design of the multi-tooth core is applied to the device.Secondly,based on the particularity of the plough cutting-pull multi-tooth core cutter,a single-tooth cutter is selected as the research object.On the basis of metal plastic deformation,finite element theory and material constitutive relation,ABAQUS software was used to establish the rigid plastic finite element model of single tooth tool plough cutting and pulping micro-channel forming.The material constitutive model,friction model and meshing technique are analyzed in detail.In addition to the rigid-plastic finite element theory are analyzed,based on plough cut again-micro grooves forming finite element model,and the finite element simulation research on micro groove geometry morphology.Finally will pick the plough cut-pull the plough cut-speed,depth and the cutting tool extrusion pressure Angle as the research factors,plough cut-pressure drawing force as the research target,by controlling the single variable method study the three factors on the micro grooves plough cut the influence of tension and compression forming process.Finally,The geometrical parameters of the plough cutting-drawing single tooth cutter were optimized by orthogonal test.On the basis of controlling the geometrical shape of the microgroove,it is necessary to keep the tool forming Angle and plough cutting depth.Plough cut-pressure drawing force as the test index,in a single tooth cutter after extrusion Angle,inclination Angle,Angle of the three as test factors,through orthogonal design orthogonal test table,the three factors influence the forming force the extent of the primary and secondary relations are studied,finally through the analysis of the poor got the optimal combination of cutting tool geometry parameter.