Research On Multiple Grains Micro Edge Honing Characteristics Of Int Ernal Honing Gear Face

With the development of high quality in aerospace,robot,automobile and other fields,the machining ac curacy,fatigue strength and transmission noise of hard gear face are required to be higher.Numerical control internal meshing power honing technology is considered as an advanced manufacturing technology for honin g hard gear with high precision,low roughness,small residual stress and regular honing pattern.The honing p rocess is complicated,uncertain and random due to the irregular superhard abrasive particles randomly distrib uted on honing gear surface,which affects the wide application of internal meshing power honing technologyPlover paper around the tooth surface of abrasive micro blade plover cut more features,from multiple pl over of abrasive micro blade cutting theory,plover cutting characteristic key parameters affecting the quality of gear honing evaluation,plover of abrasive micro blade cutting characteristics from five aspects,such as the finite element analysis and experimental verification is mainly studied the interaction relationship between a brasive grain and workpiece,to work out high quality hard tooth surface gear provides the necessary theoretic al reference.The research contents are as follows:(1)Based on the internal honor-workpiece space coordinate system,the equation of the spiral asymptotic surface of the workpiece and the meshing principle of space gear,the contact line trajectory equation of the a brasive particle and the workpiece was deduced.Based on the formula of honing force,the equivalent diamet er and contact arc length of honing model were modified and the equivalent formula of honing force was esta blished considering the influence of the axis Angle on equivalent diameter and contact arc length in honing.It provides a theoretical basis for the research of the following chapters.(2)with the aim to evaluate the gear honing quality,through the way of progressive levels,in order to ge ar honing accuracy,plover cutting efficiency and surface quality as an indicator to evaluate the quality of the gear honing and as a rule layer,rule layer for refinement,established by a single pitch deviation,the tooth pro file total deviation,helix deviation,material removal rate and surface roughness of rule layer.Based on the ch aracteristics of multi-abrasive micro-edge wear and morphology,abrasive wear,abrasive fracture,abrasive sh edding,cutting Angle of grinding edge,abrasive shape,abrasive size and abrasive spacing were used as evalu ation indexes and measure layer factors.Combined with the characteristics of the evaluation target,the ahp-t rapezoidal fuzzy-set pair analysis is determined as a comprehensive evaluation method.The significance anal ysis of the evaluation results shows that the wear factor of particle shedding and the morphology factor of par ticle size have the most significant effect on honing quality.The sensitivity analysis of the evaluation results s hows that the particle size affects the honing quality mainly by affecting the machining efficiency and surface quality,and the particle shedding affects the honing quality mainly by affecting the honing accuracy and effi ciency.(3)Based on the abrasive contact line equation and CBN geometric Angle modeling,the equivalent mod el of multi-abrasive micro-edge honing was established,and the single factor finite element simulation and ho ning experiment of multi-abrasive micro-edge equivalent honing were designed by taking abrasive particle sh edding and abrasive particle size as research objects.The variation rules of material removal efficiency,honin g force and surface roughness were analyzed by simulation.The variation rules of five sub-criteria including single pitch deviation,total deviation of tooth profile,total deviation of helix,material removal rate and surfa ce roughness are analyzed experimentally.(4)The experimental results show that the effect of abrasive particle size on surface quality and honing e fficiency is contradictory.With the increase of abrasive particle size,honing efficiency and surface roughness value increase.As the abrasive particles fall off,the local contour of honing wheel envelope surface changes,which affects the honing precision.At the same time,the effective number of abrasive particles in the honing area will be reduced,resulting in the reduction of honing efficiency.The simulation and experimental results are consistent with the evaluation sensitivity analysis,which verifies the validity of the evaluation system an d evaluation results.(5)Based on the difference in the influence degree of each index of evaluation weight on honing quality,combined with the objectivity of experimental values of sub-criteria of different factors,the merits and disad vantages of honing quality corresponding to each factor in the experiment were comprehensively evaluated.I t is obtained that 300#and 60min of thickening are the better parameters in comparison factors.It has some re ference significance to the preparation and selection of honing wheel.In order to improve the honing characte ristics and obtain the gear with better honing characteristics,based on the simulation and experimental results,it is proposed that honing wheels with different abrasive sizes can be used for rough and fine honing of diffe rent precision workpiece.Rough honing improves machining efficiency and fine honing improves surface rou ghness.Control the drop off of honing wheel to ensure the precision of honing wheel tooth surface and impro ve the service life of honing wheel.