| Aviation engine is the key structure of the development of the aviation industry,whose advantages and disadvantages present a whole level for national manufacturing industry.As an important core component of aero engine,the blisk,along with the development of the aviation manufacturing industry,puts forward higher requirements for its processing efficiency and quality.Most of the material are difficult to process material,and have complex structure characteristics,which bring great difficulties to the processing and manufacturing.How to process the blisk with high efficiency and high quality is an urgent solved problem.This paper adapts a new processing technology,namely disc / plug / side milling method,according to the slotted characteristics of the blisk channel in rough machining.Have an analysis and evaluation for design and optimization disc milling cutter,which can effectively solve the above problems.The main researches are as follows:Firstly,have an analysis for the geometric characteristics of blisks and its machining features of blade channels.Construct the offset surface model for the blisk,to ensure the region of the disc milling processing,combined with disc milling cutting motion trajectory research of tool position,which can effectively avoid the occurrence of tool and workpiece interference and provide a reference for the design of tool structure.Based on the tool structure and the proceeded characteristics of titanium alloy material,blade positioning and installation method are determined by the material of body and blade for disc milling cutter,The vector model of blade relative to the body position is built,to realize quantitative analysis for tool groove.What is more,derive the mathematical models of the main structures of the tool,and complete the construction of three-dimensional model,which provide a reference for the follow-up simulation and optimization tool.Secondly,the finite element simulation technology is used to simulate and optimize the tool.Have a finite analysis of tooth number,angle,wear for structure optimization and complete the final cutter design.Strength and mode analysis of toolare used to test the rationality of tool design,and have a refinement analysis of tool wear area for latter study.Thirdly,have a manufacture planning for disc milling cutter,whose body,blade flute,chip pocket are used by digital programming.What is more,have a titanium alloy cutting experiment,through the analysis of variance,fit test,response surface method are used to optimize the tool the cutting parameters,diminish the milling force and build a wear life model for disc milling cutter.In addition,the genetic algorithm is introduced to the material removal rate and tool life as the main optimization targets,which provide a multi-objective optimization for disc milling cutting parameters.Finally,a comprehensive evaluation of the performance of the disc milling cutter is analyzed.Milling force,tool wear and machining efficiency are the main evaluation targets of the tool.Based on the minimum membership degree and the maximum principle,the comprehensive performance of the disc milling cutter is evaluated by using the multilevel evaluation system,to achieve the comprehensive performance evaluation of disc milling cutter. |
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