Technologies Research On Turbodrill Blade In Electrochemical Machining(ECM)

In the petroleum field,because the use of turbodrills as power equipment can effectively improve drilling efficiency,it is widely used in the petroleum production industry.However,the overall structure of the turbodrill is complicated and it is not easy to assemble,which seriously restricts the performance improvement of the drill.Especially the design and processing of turbine blades,which are key components of turbodrills,have always been a very important part in the development of turbodrills.In recent years,with the improvement of the performance of turbine drilling tools,the design of turbine blades has become more complicated,the materials are more special,and the requirements for processing technology have become higher and higher.Therefore,it is necessary to introduce new processing techniques to better manufacture turbodrill blades.As an emerging special processing technology,electrolytic processing technology has the characteristics of no loss of tool cathode,high production efficiency,suitable for processing under high temperature and high pressure conditions,which can make up for the shortcomings of traditional processing technology.Therefore,this thesis proposes the use of electrolytic machining technology to manufacture turbine drill blades.According to the current research status of electrolytic machining technology,this thesis mainly studies several key technologies of electrolytic machining technology for future research reference.The main research contents of this thesis are:1.The design of the cathode tool for the electrolytic machining of turbodrill blades was studied.Taking the design of turbodrill blades as an example: First,based on the method of polynomial curve fitting,Using M language to program the blade calculation process and running the program in MATLAB to draw the initial blade curve;then import the obtained curve into Auto CAD,and repair the geometric drawing of the blade profile based on the blade geometric parameters obtained by theoretical calculation.2.Designed three models of idealized flow channel,blade cathode flow channel and near-contour flow channel,and simulated the flow field distribution of the electrolyte in the three flow channels.At the same time,when studying the cathode flow channel model of the blade,the flow field distribution when the inflow angle of the electrolyte is 0°,15°,30° and 45° respectively,and when adding the vertical and tangential flow segments,the flow field distribution in the two diversion modes.The results show that the near-contour flow channel model can obtain better flow field distribution,which has a guiding role in the electrolytic machining of actual turbine drill blades.3.The COMSOL software was used to simulate the coupling between electric field,flow field and electrochemical reaction field during the electrolytic machining of turbodrill blades.The main research is the change of temperature field in the process of electrolytic machining and the dynamic simulation of the machining process.After comprehensively considering the coupling effect between the various physical fields,the simulation obtained the influence of the electrolytic machining parameters on the temperature during the blade machining and the profile of the blade after the machining.The results show that the multiphysics coupling model proposed in this thesis can effectively predict the forming contour of the blade,and the uniform distribution of the field parameters in the machining gap effectively improves the surface of the anode workpiece material.