Study On The Manufacturing Technology Of Stator With Laminated Equal Wall Thickness

Because of its excellent output performance,simple ground facilities and directional drill,equal wall thickness screw drill has been favored by drill tools market both at home and abroad.However,the problems of poor meshing performance,complex processing technology,high manufacturing cost and easy shedding of rubber layer restrict the further popularization and application of the screw drill tool.Therefore,solving the existing problems of equal wall thickness stator is of great significance to promote the popularization of equal wall thickness screw drill and to reduce drill cost.First of all,this paper deduces the line profile of motor section by complex vector method,and develops a program for calculating the shape of the screw drill string based on MATLAB software.After inputting linear control parameters,a variety of linear visualization graphics and data coordinates can be obtained,which is easy for designers to modify and optimize.At the same time,in order to improve the linear meshing performance and reduce the wear of the rubber layer,the equidistant line of hypocycloid is further optimized.Then,based on the laminated manufacturing method,a new type stator with laminated structure of equal wall thickness screw drill is proposed.The laminated structure can transform the complex three-dimensional surface of equal thickness stator into two-dimensional laminations for manufacturing.The laminated stators can be manufactured by stacking and pressing processes,which can achieve high efficiency and high automation manufacturing.Next,the ANSYS software is used to calculate the interference amount of the laminated stators and the shell.Subject to the precision of the given assembly process,a design of the 5lz165 screw drill tool is carried out,and the assembly strength is verified by finite element method.Finally,based on the finite element analysis,the Mooney-Rivlin rubber model and the Debonding stripping model are used to calculate the rubber compression performance and the peeling force of the laminated rubber.The results indicate that the rubber compression performance and the peeling force of the rubber layer for laminated stators are better than those of conventional equal wall thickness screw drills,and the optimized cross section curve of the stator has better meshing performance.The new laminated stator screw drill,calculation software of cross section curve and optimization method of curves proposed in this paper have important theoretical significance and reference value on the further development of equal wall thickness screw drill.It can also provide reference for the improvement of low cost and high performance screw drill.