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Circular Interpolation Algorithms of 5-axis Simultaneous CNC System

武汉理工大学学报 2006年第S2期28卷 407-411页

作者： ZHENG Kuijing~(1.2) SHANG BO~2 1.Mechanical Engineering College,Yanshan University,Qinhuangdao 066004,China 2.Research and Development Center,GSK CNC Equipment Co.,Ltd.,Guangzhou 510165,China Mechanical Engineering College Yanshan UniversityQinhuangdao 066004China Research and Development Center GSK CNC Equipment Co.Ltd.Guangzhou 510165China Research and Development Center GSK CNC Equipment Co.Ltd.Guangzhou 510165China

Spatial circular arc can be machined conveniently by a 5-axis NC machine *** on the data sampling method,circular interpolation in two-dimensional plane is discussed *** key is to solve the problem of circular center ex- pressed in the workpiece coordinate system by means of the transformation *** interpolation in three-dimensional space is analyzed in *** method of undetermined coefficient is used to solve the center of the spatial circle and the method of coor- dinate transformation is used to transform the spatial circle into the *** arc in three-dimensional space can be ma- chined by the positional 5-axis machining and the conical surface can be machined by the continuous 5-axis *** velocity control is presented to avoid the feedrate *** interpolation algorithms are tested by a simulation example and the inter- polation algorithms are proved *** algorithms are applied to the 5-axis CNC system software.

关键词： Index Terms-Circular interpolation 5-axis CNC

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Dual Drive Curve Tool Path Planning Method for 5-axis NC Machining of Sculptured Surfaces

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Chinese Journal of Aeronautics 2010年第4期23卷 486-494页

作者：徐汝锋陈志同陈五一吴献珍朱剑军北京航空航天大学机械工程及自动化学院北京100191 昌河飞机工业集团景德镇333000

The problem of finished surface being not first-order continuous commonly exists in machining sculptured surfaces with a torus cutter and some other types of cutters. To solve this problem, a dual drive curve tool path planning method is proposed in this article. First, the maximum machining strip width of a whole tool path can be obtained through optimizing each tool position with multi-point machining （MPM） method. Second, two drive curves are then determined according to the obtained maximum machining strip width. Finally, the tool is positioned once more along the dual drive curve under the condition of tool path smoothness. A computer simulation and cutting experiments are carried out to testify the performance of the new method. The machined surface is measured with a coordinate measuring machine （CMM） to examine the machining quality. The results obtained show that this method can effectively eliminate sharp scallops between adjacent tool paths, keep tool paths smooth, and improve the surface machining quality as well as machining efficiency.

关键词： dual drive curve tool path planning multi-point machining 5-axis sculptured surfaces numerical control (NC) machining

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Smoothing strategy for corner of small curvature radius by abrasive waterjet machining

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Advances in Manufacturing 2023年第3期11卷 390-406页

作者： Jian-Feng Chen Ye-Min Yuan Hang Gao Tian-Yi Zhou State Key Laboratory of High-Performance Precision Manufacturing School of Mechanical EngineeringDalian University of TechnologyDalian 116024People's Republic of China

Abrasive waterjet(AWJ)is widely applied in 2D machining as it offers high machining efficiency and low machining ***,machining a 3D surface,especially for a small curvature radius freeform surface(SCRFS),results in over-erosion of the corner,and has been one of the greatest issues of *** solve this problem,a local smoothing algorithm for SCRFS is developed by the junction of two linear segments at the corner by inserting cubic second-order B-spline to smooth the nozzle path and posture under the setting tolerance error,which is aimed to avoid over-erosion due to the change in dwell *** solutions of the smooth corner position and orientation of the nozzle path are obtained by evaluating a synchronization *** to the set tolerance error of the nozzle position and orientation,the interpolation of the smooth path of the corner meets the constraint conditions of the linear feed *** simulation and experimental results show that the proposed method is validated by the experimental results and has been applied to the integral blisk machining of an aero-engine.

关键词： 5-axis Cubic B-splines Overcut Abrasive waterjet(AWJ) Corner smoothing

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A novel method for sculptured surface subdivision

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Computer Aided Drafting,Design and Manufacturing 2012年第1期22卷 15-19页

作者： You Sikun Liu Xiaochu Deng Hongguang Liu Jun Department of Mechanical Engineering School of Mechanical and ElectricGuangzhou UniversityGuangzhou 510006China

In this work, a novel method for sculptured surface subdivision to improve the machinery＇s ability and efficiency in 5-axis CNC machining complex surface is introduced. The method subdivides automatically a monolithic convex or concave or simultaneously complex sculptured surface into a number of surface patches and achieves the goal of similar normal directions and small difference between the curvatures in every patch by using weight fuzzy cluster algorithm which takes the curvatures and normal vectors of the sculptured surface into account simultaneously. The inclination angle variation between every two Cutter Contact Points （CC Points） is decreased in every patch to avoid large-angle rotation of tool to save machining time when a flat-end mill is used. This work contributes to automating 5-axis CNC tool path generation for sculptured part machining and forming a foundation for further research.

关键词： 5-axis fuzzy cluster curvature and normal direction surface subdivision

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