Research On Layering And Path Planning Algorithm Of 3D Printing Gun Drill

At present,gun drills have long manufacturing cycles,rapid wear of the alloy tip,and repeated sharpening or replacement,which reduces productivity and increases costs.The rapid production of gun drills is the long-term research direction of many manufacturers and researchers.3D printing technology has overturned the traditional process of manufacturing gun drills.The main algorithm used in model data processing is a key step that affects the accuracy of model printing,and it is also a major and difficult problem of 3D printing.In this paper,the key algorithms of 3D printing,such as layered slicing and path planning,are studied.This topic has done research on the preprocessing process of gun drill model,including reading of gun drill STL file,determination of adaptive layering algorithm,generation of section profile,planning of layer scanning path,and design of preprocessing software.In view of the phenomenon that triangular surfaces in STL files share two vertices,the redundant data is deleted without affecting the printing accuracy,which saves memory and improves algorithm efficiency.Aiming at the complexity of the model layering parameters and the difficulty of calculating the surface complex model,this paper proposes a method of triangles in vector new algorithm of adaptive,determine the accuracy of the model,according to the current layer thickness,the normal vector calculated parameters is simple and convenient calculation.Through the display of gun drill layering,the layering is reduced while ensuring the characteristics of the model,which verifies the feasibility of the layering algorithm.Aimed at the existence of less than the printer precision of the line segment causing printer pause,according to the dot product formula of the vector,the middle point of the three intersections of approximately collinear is deleted,which reduces the amount of calculation and printing time and makes data processing more convenient.To analyze several common path scanning algorithms,this paper proposes a compound scanning algorithm.In view of the warpage of the printed model caused by the shrinkage stress during cooling,the contour offset algorithm is adopted to make the model stress balance during cooling;aiming at the drawing caused by frequent nozzle ups and downs in the printing process,which affects the quality of the model,the internal area after the contour offset is divided,the odd and even layer is used to alternately fill the reciprocating straight line,and the corners of the reciprocating straight line are adjusted with 3B-splines the uniform transition of the path at the location effectively avoids the phenomenon of wire drawing,and reduces the over-filling and under-filling caused by the corners in the path.By displaying the print path of the gun drill,the correctness of the composite scanning algorithm is verified.To verify the algorithm,based on VC++6.0 and Open GL programming,a simple software operation interface is designed.Through software debugging,the defects and loopholes in the algorithm are found to facilitate the correction and improvement of the algorithm.