Study On Tooth Profile Forming Mechanism And Digital Design Method Of Tools For Machining ZC1 Worm By Hard Whirling

ZC1 arc cylindrical worm has the advantages of high tooth bending strength,high impact load,small induced curvature radius,small tooth surface contact stress,and high transmission efficiency.It is a heavy-duty or precision worm drive in metallurgy,mining,environmental protection and other industries.main form.With the in-depth application of ZC1 worms in key industrial fields,higher and higher requirements are placed on the design and manufacture of worms,especially how to achieve efficient and precise manufacturing of ZC1 worms has become one of the urgent problems to be solved.At present,the processing of ZC1 worm mainly adopts the method of turning and grinding,but this method generally adopts the combination of rough turning and fine grinding.The tool setting deviation between multiple processes and each process easily leads to unstable machining accuracy,and the machining Inefficient and complicated post-processing steps.As an efficient and green large-scale thread manufacturing method,cyclone hard milling can significantly improve productivity and surface quality,and can even achieve "milling instead of grinding".The obvious processing advantages have attracted more and more attention in the field of cutting.Become one of the alternative processes for high-performance ZC1 worm machining.However,due to the complex cutting motion and the relative positional relationship between the cutter and the workpiece during whirl milling,the forming cutter designed according to the traditional profile design method will produce overcut or undercut during the machining process,resulting in an increase in the worm tooth profile error,restricting the application of hard spin milling in ZC1 worm machining.Therefore,this paper studies the digital model of ZC1 worm and the fast acquisition method of section data,and establishes an accurate design method of tool profile based on the worm axial equidistant section envelope.The relative motion law of the tool and the workpiece in the hard rotary milling process was studied,and the 3D model generation technology of the worm tooth profile in the hard rotary milling process was established,and the influence of different machining parameters on the tooth profile error was deeply analyzed.Through the combination of experimental method and simulation,the accuracy of the tool profile is verified.The profile design process of ZC1 worm hard rotary milling tool was sorted out,and a rapid digital profile design system was developed.The main work is as follows:(1)Research the precise measurement method of the ZC1 worm axial tooth profile,and realize the fast and accurate acquisition of the discrete point cloud data of the tooth profile.The characteristics of the ZC1 worm tooth profile were analyzed,the inverse modeling method of the tooth profile was studied,and the efficient digital reconstruction of the complete tooth profile was completed based on the discrete cross-section data.The principle of tool-piece homogeneous coordinate transformation is studied,and ZC1 worm is used to digitize tooth profile data to realize the reverse calculation of tool profile discrete data.(2)Analyze the kinematic characteristics of hard rotary milling,study the coupling relationship between the cutter profile and the tooth profile in a specific process system,establish the ZC1 worm envelope forming model,use the motion simulation method to verify the profile design effect,and analyze the effect of different machining parameters on the tooth profile error.influences.Study the changing law of cutting force in the process of ZC1 worm hard rotary milling,establish a macroscopic deformation model of the process system under actual working conditions,and based on the experimental method,study the influence of cutting process parameters on tool-part deformation and tooth formation error,and carry out the worm profile.Local correction.(3)Establish the accurate design process of ZC1 worm hard rotary milling tool profile,and develop a tool profile rapid design system based on the existing digital modeling platform to realize tooth profile reconstruction,tool profile reverse calculation and correction,tool digital model and engineering Document output and other functions.