Research On Aero-engine Air Distribution Box Processing Technology

With thedevelopment of aero-engine technology,it uses of lightweight and high strength thin-wall parts to reduce weight to increase thrust-weight ratio whitch is an important technical performance index of aero-engine Operating Mechanism,higher requirements have been put forward for the performance and weight of the part.Air distribution box is a typical thin-walled part whitch mainly control the flow and the course of the air.If the parts Deform or the surface quality does not reach the standard required of the planner,and then does not reach the standard required of engine cooling projected whitch leads to the overheat of part of Aero-Engine,in the severe cases,this can reduce the life of the Aero-Engine by huge amounts.So it is important to control the deformation,dimensional accuracy and surface quality under the premise of thin-walled part machining.In this article,the achievements and work is as follow:(1)Explore and make the casting process route,analyze the cause of the deformation,improve the deformation by increasing the ribs,the part quality has been significantly improved.But the deformation still goes beyond the prescribed requirements,so we discarded this scheme;(2)The blank is changed to forging on the failure of casting processing,all of the surfaces are machined,make the Optimal processing route by try two different schemes of machining process.(3)Regarding the problem of the part deformation,application of ANSYS to analyse the connection between cutting force and deformation,determine the scope of reasonable processing parameters;(4)With the first piece of processing qualified,study the deformation mechanism by CMM,improve the machining precision availably by using the technology of error compensation.The qualified rate with new parameters and process routes of the parts reached 100%,and the part surface quality is increased sharply after finishing machining,the parts control the flow and the course of the air availably on the component in the manipulation of the assembly.