Reasearch On Design And Optimization Methods For BTA Deep Hole Drilling Tool

Deep hole machining is widely used in energy extractive industry,Aeronautics and Astronautics,engine manufacturing,machine tool industry and so on,it is great difficulties to Process deep hole,as well as deep hole drilling is one of the critical,processes in part manufacturing.as a closed or semi-closed machining method,the process of deep hole drilling exists with some problems such as breaking chip,cooling and tool wear.In this thesis,we focus on the optimize design of BTA deep hole drilling tool and the two guide pads using modern design theory and finite alement design method,completed research h on drilling tool staties analysis as well.The paper analysis the working principle of BTA deep hole drilling tool,completed research on tool mechanical load analysis on the cutting edges and guide pads,established the mechanical model of BTA deep hole drilling tool.based on the force balance principle and the stability design principles of the design of BTA deep hole drilling tool,the thesis proposed the arrangeme t of the outer edge,center edge,middle edge and the design parameters of the cutting edge width of each tool's cutting edge.Completed research on how the angle of guide pads whith are ? and ? influence the stability of BTA drilling tool,obtained the design zone of the angle of guide pads,provide a theoretical reference for the design of BTA deep hole drilling tool.In this thesis,we build the solid geometry model of BTA deep hole drilling tool according to the actual condition of BTA deep hole drilling tool,we defines the contact relation between guide pads and guide sleeve,build the finite element analysis model of the tool,completed the the Static analysis and contact analysis of BTA deep hole drilling tool,obtained the the stress-strain distribution and deformation of the tool.The thesis discussed the changes of contact stress between the drilling tool and the guide sleeve at the different angle of two guide pads,taking the maximum contact stress as optimize design objective function,completed the optimize design of the angle of two guide pads,obtained the best angle of two guide pads.Based on the variable density method of the topology optimization theory,the thesis works on the topology optimization of the BTA deep hole drilling tool,discussed the process of topology optimization.according to the functional requirements of the drilling tool,defines the design area and the non-design area before the solving prosesss can be started,completed the topology optimization of the BTA deep hole drilling tool using topology optimization modular in ANSYS,obtained the relative density diagram of the design area,optimized the design area in which density belows the threshold value.After the optimization design of the BTA deep hole drilling tool,the maximum stress of the newly designed drilling tool is reduced and the sectional area of the chip mouth is significantly increased without losing stiffness.