Research On Parametric Modeling Of Helical Surface Based On Characteristic Line&Normal Profile And Five-axis NC Machining Technology

The helical surfaces widely used in modern mechanical manufacturing,electronics, light industry, aerospace and defense cutting-edge industry, especially insome of the special equipment on the device and process, they often played a pivotalkey role. However, due to the helical surface machining involved in a number ofspecialized theory and technology, the forming principle is more complicated andprocessing is difficult, so how to achieve the helical surface high-precision,high-quality processing of research has a very important academic significance andpractical value.Research on general mathematical model of the helical surface. In-depth analysison the basis of the helical surface movement forming principle,adapt synthesizemodular modeling ideas,proposed the construction of a complete helical surfacemathematical model based on the three core part of general mathematical model.Classification of contour busbar discussed in accordance with the movement of thehelical surface and build its general mathematical model; different parametersaccording to the inclination lead a general mathematical model of the characteristicline; build a model of generic mathematical cross-sectional coordinate system withworkpiece coordinate system conversion, realized modeling on the basis of thegeneral mathematical model of the three-part of any rotator helical surfaces, andprovide theoretical support for parametric modeling of the helical surface.Research on parametric modeling method of the helical surface. Geometriccharacteristics of the integrated use of PRO/E parametric modeling module, in-depthstudy of the exact shape of the helical surface parameterization, proposed threeparametric modeling method based on PRO/E system, combined with a generalmathematical model of the previous chapter with spiral groove scan mixed featuremodeling method to achieve the accurate modeling of the helical surface parameters.Research on milling process for helical surface processing optimized. Throughanalysis of PRO/NC each function module, create manufacturing model andcompletes the operation setting; Combined with the feature of helical groove geometry and formulate a "rough milling-half precision milling-precision millingprocessing" scheme, since the surface contour of the surface cutting way is proposedto generate tool path; Finally using PRO/NC module provides "screen demonstration","NC detection" and "cut detection" function to test the tool path until undercuttingdoes not exit, and then cutter location file to be created.Research on post processor development based on PRO/E. In this paper,exampled by a commonly used machine control system to modify, based on PRO/Esystem comes with the optional file and research on the general five-axis postprocessor, developed post processor cutter location file converted into the machineidentification code instructions,finally simulation and test by CIMCO EDIT software,so that the rear of the test developed by comparing the actual results with thetheoretical results whether the processor correctly, at the same time to verify thecorrectness of the theory above.