| The deep hole processing technology is no longer confined to the relatively closedmilitary field in the early1950s.It’s quickly expanded in the aerospace,automotive enginemanufacturing,energy excavating,etc.As the market demands diversifying,the higher precisionthe deep hole machining,the more difficulties it increases.The problem of improving deephole linearity is a matter of great importance.The intention of this paper is to survey the linearity deflection of small deep hole whichdiameter ranged between φ3-16mm caused by processing.This paper discusses the factorsaffect the linearity from the aspects of gun drilling cutter parameters,machine tool auxiliaryand vibrating system in processing,and put forward some corresponding solutions accordingto various factors.It is concluded that the feasibility of the scheme will demonstrate a successby analyzing computer software (Ansys),simulation software (Matlab) and experimentalmethod.The paper firstly analyzes the straightness deviation caused by the orientation of theposition distribution through the angle of cutting tool parameters.We also cite the concept ofstability to describe the unstable state in processing one by one,at the same time,redesigningcurrent gun drill parameters by combining with computer analysis software.Secondly,analyzing the impact of linearity from machine aids aspect,we will derive the linearitydeflection predictor formula by numerical methods,and confirm the predictability andaccuracy by experimental data.Finally,analyzing from the point of machine vibration systemand discussing the flutter which is caused by cutter and work piece how to impact onlinearity.We have referred to the design methods of Magneto-rheological (MR) fluid absorberto design dampers adapted to gun drilling machine,and simulate this situation in the use ofsimulink part in Matlab.Analyse the linearity of gun drilling tool.The results of the simulationprove have a good inhibitory effect on straightness. |
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