1、2500 英文单词， 13500 英文字符 ， 中文 4150 字 文献出处： Grigoriev S N, Kutin A A, Pirogov V V. Advanced method of NC programming for 5-axis machiningJ. Procedia CIRP, 2012, 1: 102-107. Advanced method of NC programming for 5-axis machining Sergej N. Grigoriev, A.A. Kutin, V.V.Pirogov Abstract This paper presents a
2、method to simultaneously increase the accuracy and decrease the calculation time for complex tool path programming in multi-axis machining centers. Examples of complex parts requiring such complex tool paths include various kinds of turbine blades, pump-forcing augers, teeth surfaces, etc. It explai
3、ns the creation of topological structures on the basis of analytical spline curves with floating range definitions. The method for tool path calculation accommodates the specific requirements for multi-axis milling. The algorithms developed are the foundation for the CAD/CAM software that allows for
4、 NC programming and machining on 5-axis centers employing any design model. Industrial tests reveal a 70-80% reduction of NC programming time of parts with complex surfaces, reduced machining time of approximately 40-50% using basic high-speed cutting methods and custom-made tools. The advanced meth
5、ods of NC programming result in substantially increasing machining accuracy. Keywords: NC programming, multi-axis milling, CAD/CAM software, machining accuracy 1. Introduction Recently, computer capabilities have substantially increased the programming speeds which in turn enabled a 90% reduction of
6、 machining time for components using a variety of methods 1, 2. However, implementing high speed and multi-axis machining in manufacturing requires new software for complex surfaces. At the same time, developers continuously improve and develop more elaborate products that cause additional difficulties in manufacturing. These problems cannot be solved by using todays mainstream algorithms. As an example, consider a turbine wheel with blades of double curvature (fig 1). In order to increase
