Design Of Geometric Simulation System For Peripheral Grinding Of Indexable Inserts

The "Made in China 2025" and "Internet plus" national development strategies promote the deep integration of the new generation of information technology and AI technology with manufacturing industry.They also enhance the manufacturing capacity and promote the rapid development of manufacturing industry.Digital twin technology is important for the idea of intelligent manufacturing.It can realize the interaction of physical world and information world.The geometric simulation system is a key part of peripheral grinding digital twin system.It can be used to realize the geometric simulation of peripheral grinding,and get the virtual machining results.According to the grinding simulation,designers can modify and optimize the machining process in advance.The method effectively reduces the production risk and shorten the development cycle.In this paper,the previous research results of the research group were combined with digital twin technology and geometric simulation technology.The futher research was carried out in the following aspects:(1).The overall design of the peripheral grinding geometry simulation system for indexable inserts was carried out.Then the design principles and development process of the simulation system were proposed.According to the development process,the requirements for the simulation system were analyzed and the overall structure was designed.Based on the application development technology of OpenGL and c++,the geometric simulation system for peripheral grinding was customized.(2)Based on the characteristics of peripheral grinding environment,the shell model of indexable inserts blank with triangular mesh and the 3D geometric model of peripheral grinding machine were established.The view interactive control technology was studied.And the grinding simulation scenes with different perspectives were presented by the window view transformations.By changing the size of projection area in camera coordinate space,the simulation view can be zoomed under the effect of projection transformation.The quaternion rotation matrix based on trackball principle was derived.Then the view transformation parameters were extracted from the matrix.The simulation view rotation was realized by view transformation.(3)The compiler of NC machining program was developed.It used to realize the analysis of grinding program.The Time Division algorithm was used to interpolate the motion path of peripheral grinding.Then the continuous timer response was used to realize the motion control of the simulation model.As a result,the simulation animation was obtained.(4)The Ray Intersection method for grinding Boolean subtraction was proposed.That realized the intersection calculation between indexable inserts model and wheel model in peripheral grinding simulation.The indexable inserts’ three-dimensional model was reconstruction with the result of Ray Intersection.The Boundary Detection method for the collision detection was proposed.It automatically detected collision between the wheel and the other parts of grinding machine.(5)Finally,the development of the peripheral grinding geometry simulation system was completed.The simulation examples showed that all functions of the system can be executed normally.The geometric simulation for peripheral grinding of indexable inserts can be realized.The simulation animation was smooth.