The Research And Application Of Chamfer With Equal Front Angle And Large Space Chip-removing Groove

The chamfering process in the CNC machining process cannot meet the requirements of high-speed and high-efficiency requirements as an important part of the finishing process.In a sense,the chamfering process to a certain extent delays the modern cutting process to the direction of automation and intelligence.This development process has greatly hindered the rapid improvement of cutting accuracy and processing efficiency.Therefore,developing a chamfering tool system for intelligent manufacturing and automated machining equipment is an indispensable part of research in advanced manufacturing.This paper firstly studies the cutting mechanism of chamfer,analyzes the shortcomings of traditional chamfer,and proposes a new type of chamfer design.It also establishes a new mathematical model of chamfer cutting edges and further constructs them.The parameterized three-dimensional model was used to perform the finite element simulation analysis of the cutting process,and the best tool geometry parameters were obtained.Finally,the cutting parameters were verified and optimized through cutting experiments.The main research contents of this article are as follows:(1)Put forward the problems of the traditional chamfer in the machining process and analyze the cutting mechanism of the chamfer regarding their geometric structure and defects in the cutting performance.Furthermore proposed the improvement of the cutting edge and structure of the new chamfer.It is envisaged that a geometric mathematical model of a new type of chamfer blade will be initially established.(2)By analyzing the grinding conditions in the manufacturing process of chamfer,a cross-section movable frame for the change of the spatial position of the grinding wheel is established,which combines the grinding wheel grinding path and the grinding path of the chamfer.The new chamfer blade geometry model was optimized,and a parametric 3D model was constructed.Based on this,the secondary development of the new chamfer digital model was realized.(3)A simulation model of the cutting process was established for the boring machining with the drilling model as the model and the chamfering with the milling model as the model.Thesimulation experiment was established with the geometric parameters of the tool's rake angle,relief angle,base circle percentage,and helix angle.The geometric parameters of the chamfer were optimized through experimental data analysis.(4)Orthogonal experiment method was used to establish an orthogonal experiment table with cutting depth,cutting speed and cutting amount per tooth.The cutting force experiment was conducted to verify the tool geometry parameters obtained by cutting simulation and further obtained by measurement.Cutting force data and surface roughness data combined with machining efficiency yield optimized cutting parameters.Finally,by comparing the cutting force and the surface roughness of the conventional chamfer and the new chamfer under the same cutting conditions,the superior cutting performance of the new chamfer is verified,which provides a theoretical basis in the design and development of a series of new chamfer.