The Research On The Free-form Surface Design And Five-Axis And High-speed NC Machining Of Impeller

It is the tendency for modern machine manufacture field to attain the high accuracy and high efficiency. It is also an important goal that modern numerical control technology pursues. The technology of five-axis numerical control machining machine is a very important way to carry out large,different and complicate accessories. And high-speed machining is the best way to improve the efficiency and achieve the purpose of mirror-milling. Especially on the machining of ultra-thin parts , which can not be substituted by other technology.Impeller is a type of freeform surface part. The traditional manufacture method of it is laborious and time consuming and the precision can't be guaranteed. And the professional Impeller CAD/CAM software are expensive. Therefor, by studying the use of existing common CAD/CAM software to design, machine the impeller,it has a very important significance for the actual production of the similar parts.On the basis of seriously studying the free-form surface design principles and five-axis and high-speed machining , this paper use the method of B-spline to get the second-order continuous surface of the impller ,by rectified the fair weight term and deviate weight term. Import the CAD model of the impeller into CAM module. Researching it's processing plan and choosing the parameters of the 5-axis and high-speed machining, the cuter position is calculated. And the NC code of impeller,which accord to MIKRON UCP 800 machine can be got through the post-processing. In the last, validate the accuracy of the NC cord by simulation, the impller can be produced. The method can be used to ensure the accuracy under the premise of fully utilizing the of software's function design,machining and simulation, such as UG,PowerMill and Vericut. It provides the effective design and the processing method for typical thin free-form surface parts as impller.