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Research on Process and NC Scan Route of Rapid Prototyping Based on Powder of Wood

Author: FangXiaoLin
Tutor: GuoYanLing；ZhaoHui
School: Northeast Forestry University
Course: Mechanical Design and Theory
Keywords: Rapid Prototyping Wood flour Scan path Process parameters
CLC: TH166
Type: Master's thesis
Year: 2008
Downloads: 93
Quote: 4
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Abstract

Since the introduction of the world's first commercialization of rapid prototyping equipment since the rapid prototyping of advanced manufacturing technology boomed. Countries for rapid prototyping of new materials, new processes have been in continuous exploration. Popularization of rapid prototyping, rapid prototyping materials are more expensive, largely restricted to cheap new materials and new techniques quickly become a hot research. Wood flour compared with the current rapid prototyping material has the advantage of cheap, environmentally friendly, and preparation is relatively simple, so the wood flour as the main material for rapid prototyping and manufacturing must have important theoretical significance and practical value. The main content of the study, research paper focuses on the rapid prototyping of wood flour-based molding process including contour scanning path generation algorithm, the study of the impact of the rapid prototyping of process parameters on the forming quality and efficiency, as well as a process to improve parts strength. Generation algorithm based on the the STL model hierarchical algorithm, and the scan path better hierarchical algorithm, and detailed analysis of the hierarchical algorithm and path generation algorithm molding efficiency and molding quality. Combined with the characteristics of wood flour-based rapid prototyping process, better scanning path generation algorithm - the composite scan path generation algorithm, the idea is to bias contour scanning and subregional reciprocating scanning combined. This scanning method combines the high accuracy of the contour scanning, subregional reciprocally scanning shortcut the advantages of stability, to some extent overcome Offset contour scanning speed is slow, the complexity of the algorithm and not a defect of the subregion reciprocating scanning accuracy. Mixed wood powder and hot melt adhesive powder sintering experiments to analyze the impact of the rapid prototyping process parameters on the quality of the molded parts; through experimental analysis of the laser power, scan speed, scan spacing, layer thickness, scan mode the impact of process parameters on the forming quality and efficiency, has come to the main process parameters on forming quality and efficiency; comprehensive process parameters on the molded part quality and efficiency, optimization of process parameters configuration. Bonding material for molding the disadvantage of low strength and its own characteristics, and the workpieces strength to improve the theoretical, was added in each layer dusting \rate compensation to improve the workpiece strength; to adjust the mixing ratio of the hot melt and the wood flour, to add a coupling agent, and select a gum class with higher strength and adhesion, and more preferably after treatment.

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