Study On The Performance Of Plunge Cutter On The Basis Of Length To Diameter Ratio And Shock Absorption

In recent years,the state of aerospace,hydropower and other industries more and more attention.To hydroelectric power generation in the turbine,for example,how to quickly,efficiently and economically to produce complex structure,material removal rate of high parts,which is the level of the country's manufacturing a reflection.In view of this situation,plunge milling this efficient processing methods are widely used.Compared with other processing methods,plunge milling can better meet the complex surface,the structure of complex parts processing requirements.Turbine in the flow channel processing,the need for length and diameter ratio of 14.9: 1 cutter.As the aspect ratio is too large,so in the processing process is very easy to produce vibration,cutting in the large margin,the blade severely damaged,but also produce a series of noise and other hazards.In order to make milling can be a better application in the manufacturing industry,to solve the vibration in the processing of large problems.In this paper,the following research:First of all,through the introduction of the world's existing vibration arbor,from which to select the most widely used vibration reduction technology,analysis of the principle of vibration reduction,the preferred vibration model.The simplified model of the tool bar is established and the simplified model is analyzed to analyze the main parameters affecting the vibration.Secondly,the overall structure of the vibration damping system design.By using cantilever beam simplification method,the mass ratio of arbor is calculated.And the main structural parameters of the vibration damping system are determined by simulation analysis of the internal main structure using simulation software.Thirdly,the experiment of inserting and milling is carried out,the parameters of inserting and milling are collected,and the main cutting parameters affecting the vibration are analyzed by orthogonal experiment.The genetic algorithm was used to optimize the parameters,and the experiment was carried out to validate the optimization results.Finally,the finite element simulation method was used to analyze the dynamics of the three types of arbor and observe the modal and frequency response characteristics.The internal structure of the arbor is simulated and analyzed,and the influence rule of the main result parameters on the vibration reduction effect is obtained.Do cutting experiments,verify the accuracy of simulation results.The damping shank designed in this paper can be tested by experiments,which can achieve a certain damping effect,which provides some reference basis for the improvement and optimization of the damping shank.