Loading Mechanism And Control Method Of High-speed Milling Security Destruction

High-speed cutters security destruction problem is the critical issues to solve cutters precision and high efficiency cutting.High-speed cutters security destruction problem can be divided into three stages to interpret,they are cutters integrity destruction,cutters initial downturn and cutters security downturn.How to extend tool using life,improve the safety and reliability of cutter used and control component failure deformation time is an important issue to be solved using cutters at present.In support of the National Natural Science Fund Project "Energy-efficient Cutters Wave Dynamics Damage Mechanism and Multi-scale Collaborative Design Method(51375124)",do the following research on cutters security destruction problem,it includes initial downturn,security downturn procession,integrity destruction loading mechanism and cutters security control method:To research on high-speed cutters integrity destruction loading mechanism,divide cutters integrity behavior into some categories,combined with cutters material surface microcosmic morphology and microstructure,respectively propose identification method of cutters joint face crushing and cutters ductile fracture behavior.Through energy transfer to communicate macro/mesoscopic load,build cutters integrity destruction criterion.Respectively analyze joint face crushing and cutters ductile fracture in factors response to obtain integrity load mechanism and propose cutters integrity destruction control method.Based on high-speed cutter security and stability model and analytical results,conduct the high-speed milling experiment using four typical structure of the high-speed cutters,obtain cutters security instability characteristic behavior sequences,clarify the process of high-speed milling security instability.Through the research on centrifugal force which can cause cutters component security instability,establish cutters dynamic cutting force spectrum model and analysis method,receive high-speed cutters loading mechanism,combined with high-speed cutters security stability analysis model and experiment,raise cutters initial downturn load control method.According to the high-speed cutters vibration response analysis results,obtain component deformation and vibration behavior characteristics during the process of cutters security downturn,reveal cutters security downturn evolution process and load characteristics.Based on the cutters security downturn response analysis which under different centrifugal force,preload and cutting force,obtain high-speed cutters security downturn load mechanism.Analyze deformation rate behavior characteristic of the deformation of high-speed cutters model,obtain cutters security downturn load mechanism,combined with the experiment to raise load control method during the process of cutters downturn.Using axiomatic design theory,set up cutters security features designed model,based on the interaction generated by security design,decoupling and reconstruction cutters security design matrix,while establishing cutters underlying functional design model,proposing cutters security structure and crafts collaborative design methods.