Research On Key Technology Of Virtual Processing Of Solid Carbide Milling Cutter

The solid carbide milling cutter has a complicated structure,and the hardness of the hard alloy material is higher than that of the general metal material,and the processing difficulty coefficient is large,and a special five-axis tool grinding machine is needed.In production,the grinding process is the bottleneck.Grinding programming is difficult and requires the use of special grinder software.If the NC code is generated incorrectly,it may cause overcutting or less cutting,which may result in unqualified and scrapped machining parameters.In actual production,it is necessary to adjust the cutter several times to verify the correctness of the cutting parameters and cause a lot of waste.Virtual manufacturing technology solves this problem effectively.Grinding simulation can verify the accuracy of NC code,while neglecting the actual processing constraints,processing as fast as possible,and improving production efficiency.In order to fill the shortage of domestic grinding software,this project cooperated with Dalian Guangyang Technology Group Co.,Ltd.,the largest manufacturer of five-axis tool grinding machines in China,with the support of major national science and technology.The following research was carried out on the key technologies of solid carbide milling cutter virtual processing:(1)In order to meet the requirements of five-axis grinding,the octree structure is used to establish the blank model.The octree model is not only simple in structure,but also easy to store data.At the same time,the octree cube node can satisfy the Marching Cubes algorithm to extract the isosurface data.Require data reuse and efficiency.To realize the cutting simulation to transform the octree model into the volume data structure,this paper proposes a new method to establish an implicit volume based on the octree model.The implicit volume is based on the Signed Distance Field(Signed Distance Field).The distance field is used to represent the implicit volume,the solid model is not generated,the solid model is not needed,the amount of Boolean operation data is reduced,and the removal speed of the cutting simulation material is effectively improved.Only the intersection of the tool and the blank is octree divided to reduce the amount of calculation.(2)Create the Marching Cubes algorithm to extract the isosurface.The MC algorithm generates the isosurfaces,only the eight vertex coordinates of the octree node cube,and the corresponding vertex signed distance field.It is simple and efficient,no need to generate other data information,and reduce unnecessary space.waste.The polygon surface is extracted according to the data structure of the isosurface from the MC algorithm,and the polygon surface is approximated to approximate the surface of the cutting surface.(3)The model reconstruction coordinate data is huge.This paper uses VBO technology to improve vertex data transmission efficiency and reduce system resource usage.According to the 3D coordinate data obtained after each cutting,the OpenGL double buffering technology is used to realize the smoothness and realism of the cutting simulation animation.The cutting surface and the stock are rendered in different colors,and the display is more intuitive.