Parameterized Design Modeling Of Staggered Tooth BTA Drill And Optimization Of Structure

Deep hole machining technology is widely used in mechanical manufacturing field with high quality of processed hole,Large length to diameter ratio of the hole and high machining efficiency,especially in the field of nuclear power,the deep hole processing is one of the critical processes in manufacturing of nuclear power tube plate.The processing of Deep hole machining is complicate and its cutting condition is poor,besides,it exists chip breaking,chip removing,stability,guidance and wear problem,which make it become an important problem in the field of manufacturing.This paper taking the staggered tooth BTA deep-hole drill as the research object,analyzed the design theory and methods of the drill,built a parametric design modeling system based on SolidWorks,using the finite element method to analyze the structure and contact area of the drill and optimize related parameters optimization,provided platform of parametric modeling and optimized design for the staggered tooth BTA drill.This paper systematically elaborated the working principle and structure of the staggered tooth BTA deep hole drill,configuration problem of the cutter.Established drilling force model by analyzing the drilling mechanical characteristics.According to the analysis and calculation of force balance principle and stability principle,the article obtained the position range of two guide pads and distribution of the working width of the blade.It provided guidance for the design of chip breaker and chip removal channel by analyzing parameters which impact chip form and chip removal channel area on the aspect of chip removing.Analyzed the impact of parameters on the performance of the staggered tooth drill,summarized the design method and experience of the staggered tooth drill,completed the parametric design of blade parts,guiding parts,chip removing and other body parts of the staggered tooth drill.This paper gave the overall structure of parameterized modeling system of the staggered tooth BTA drill,and completed the design of the system function module by requirement and process analysis of the system.On the basis of the further study of the database technology and secondary development technology of SolidWorks,completed the main function modules development of parametric design,management of parameters,automatic entity modeling.Through the design of the system interface and program structure,finished the integration and control of each function module of the system.The test of different specifications modeling of the drill by the system showed that the system ran well and the design efficiency was greatly improved.This paper established the drill geometry entity model using the staggered tooth drill modeling system and established the drill finite element analysis model based on the actual work and the stress distribution of the drill.Using ABAQUS to complete simulation analysis of the intensity of drill body and the contact of guide pads,it got the stress and strain distribution of drill body and the contact area,and verified the accuracy of the simulation results by the strength test and the actual work situation.It optimized structure parameters of drill body by finite element analysis method and obtained the optimal structure parameters that could satisfy the requirement of blade strength.Article studied the contact situation of two guide pads in different position,guided by the two relatively stable contact area,the smaller the contact stress and stress difference as the goal,optimize the guide pads position,obtained optimal distribution Angle of the two guide pads.