Research On Path Generation Of Five-axis Machining For Engraving In Golden Jewelry

In processing industrial of gold jewelry,processing technic plays an important role in the artistic effect and it also determines the market value of jewelry.The processing technic of gold jewelry isn't single,but the complicated operation and high technology in jewelry processing will require the operators to have more professional skills.In recent years,most industries begin to use multi-axis machining in order to improve production efficiency.However,due to the particularity of processing gold jewelry,there is a lack of tool path generation algorithm.Under this background,this paper gives further research on this topic.The main content of this paper is as follows:1.Establish a parameterized model for the tool-path generation of a single pattern.We use a mapping algorithm to map the 2D patterns into the surface of bangle and form3 D patterns.In order to figure out the pose of the cutter in each point during the multiaxis machining process,we define the local coordinate system and use threedimensional coordinate rotation matrix,Rodriguez rotation formula to calculate the pose of the cutter in each key points.Finally,use the interpolation algorithm to obtain a smooth machining tool path.2.Using the Ant Colony Optimization Algorithm to optimize the tool path between every single pattern.In this paper,the tool path connection of complex points is abstracted as a TSP model.We establish the model of ant colony algorithm and adjust the parameters of this model in order to achieve fast convergence of results,which will compute the shortest path as soon as possible.Through the comparison of simulation time between the tool path using the Ant Colony Optimization Algorithm or not,we can prove that using this algorithm will shorten the machining time and improve the machining efficiency.3.On the basis of the algorithm described above,this paper develops a prototype system of tool path generation in the environment of VS and Siemens NX platform.A virtual kinematics model of the five-axis gold jewelry machine tool has been built in NX post-processor.Based on the research achievement of this paper and the function of the CAM model in NX software,we verified the validity and practicability of the whole algorithm by several simulations and machine simulation examples.