Research On A New Helical Cone Grinding Theory And Cutter Grinding Machine

Drilling is one commonly-used processing method in the production process and one of most important procedures in metal-cutting process.approximately accounting for one-third of all metal-cutting processes.If the geometry and the angle of the drill point are reasonablely chosen,drilling performance will be improved and processing efficiency will be increased in a large extent, so, many scholars have been committed to the research on new drill point and new methods for grinding twist drill.On the basis of research on conical grinding method and variable lead helicoids grinding method,the author puts forward a new method for grinding twist drill—helical cone grinding method.First,the paper discusses the grinding principle and the movement form of the conical grinding method and variable lead helicoids grinding method,and proposes movement form of the helical cone grinding method.On the basis of mathematic model of conical grinding method and variable lead helicoids grinding method, the author derive the equations of rake face and flank face of the helical cone drill point in the drill point coordinate system and the grinding equation of the flank face in the machine coordinate system and determine the grinding parameters of helical cone grinding method.On the basis of determining movement form of helical cone grinding, the three-dimensional model of the helical cone cutter grinding machine is drawn by using UG softwear and the kinematics simulation is done. The relationship between grinding parameters and geometric parameters based on the mathematic model and draw the curve of grinding parameters influencing on geometric parameters is derived by using matalab.After analyzing the character of grinding parameters, one of grinding parameters is fixed and one-to-one correspondence between grinding parameters and geometric parameters is defined.Otherwise, the interface for calculating parameters of helical cone drill point is established with Delphi softwear to determine quantitative relationship between grinding parameters and geometric parameters.After analyzing sensibility of grinding parameters, how great grinding parameters impact on geometric parameters is identified to provide a basis for manufacture of structure and control system of cutter grinding machine.The three-dimensional model of helical cone drill point is established and its angels are measured proving that its back angel and its geometry are reasonable.Drilling process of helical cone drill point is simulated by using FEM analysis softwear Deform3D,comparing the result with cone drill point's to prove the machinability of helical cone drill point is better than cone drill point's.