逆向工程辅助的零件修复技术
发布时间：2019-02-20 21:23
【摘要】：随着技术的进步,机械零件中出现了大量的有着表面形状复杂,外形呈自由曲面的零件。一旦这些零件因磨损、断裂、腐蚀等原因失效,整个机器将不可避免彻底失去其使用功能。传统的零件维修方法在修复这些失效零件,要么修复过程繁琐、复杂,要么无法修复。这造成了巨大的浪费。为了精确地、方便地修复这些形状复杂、有着自由曲面特征的零件,本文尝试了引入逆向工程技术中的表面数据采集技术,结合快速成型技术对这些失效零件进行修复,为复杂表面的失效零件提供了一种新的修复手段。 本文的研究包括以下几个方面： 1)逆向工程辅助的零件修复技术的总体方案设计,研究了使用于使用本方法进行修复的零件失效形式,逆向工程数字化采集方法的选择,以及零件缺损部位数字模型的获得和快速成型修复的总体流程。 2)研究了分析了失效零件表面数据采集与一般逆向工程数据采集之间的不同之处,提出了针对以修复零件为目的的失效零件表面数据采集的方法。 3)通过将失效零件表面数据与原始CAD模型作对比,得到零件缺损部位的数字化模型。在具体比较方法上,本文提出了点云比较法和实体比较法两种获得缺损部位的数字化模型的方法。 4)提出了使用快速成型技术,对零件进行修复的技术。本文研究了根据零件材质的不同,选择不同类型的快速成型方法进行修复。根据各种快速成型方法的技术特点,将失效零件的修复方法分为直接修复法和间接修复法两类。 论文最后,通过两个失效零件的实例数据采集与快速成型修复,验证了将逆向工程技术与快速成型手段相结合,修复复杂表面零件的可行性与实际运用价值。
[Abstract]:With the development of technology, there are a lot of parts with complicated surface shape and free-form surface. Once these parts fail due to wear, fracture, corrosion and so on, the whole machine will inevitably lose its function completely. The traditional method of repairing these invalid parts is either complicated, complicated or impossible to repair. This caused a great waste. In order to accurately and conveniently repair these parts with complex shapes and free-form surface features, this paper attempts to introduce the surface data acquisition technology in reverse engineering technology, combining with rapid prototyping technology to repair the failure parts. It provides a new repair method for the failure parts of complex surface. The research of this paper includes the following aspects: 1) the overall scheme design of the reverse engineering aided part repair technology, the research of the failure form of the parts used in the repair using this method, and the selection of the digital acquisition method of reverse engineering. As well as the part defect location digital model and rapid prototyping repair of the overall process. 2) the difference between surface data acquisition and general reverse engineering data acquisition is analyzed, and the method of surface data acquisition for repairing parts is put forward. 3) by comparing the surface data of the defective parts with the original CAD model, the digital model of the defective parts is obtained. In this paper, point cloud comparison method and solid comparison method are proposed to obtain the digital model of the defect. 4) using rapid prototyping technology to repair parts. In this paper, different types of rapid prototyping methods are chosen to repair parts according to their different materials. According to the technical characteristics of various rapid prototyping methods, the repairing methods of failure parts are divided into direct repair method and indirect repair method. Finally, the feasibility and practical application value of repairing complex surface parts by combining reverse engineering with rapid prototyping are verified by data collection and rapid prototyping repair of two invalid parts.
【学位授予单位】：南昌大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH13;TP391.72
本文编号：2427291
[Abstract]:With the development of technology, there are a lot of parts with complicated surface shape and free-form surface. Once these parts fail due to wear, fracture, corrosion and so on, the whole machine will inevitably lose its function completely. The traditional method of repairing these invalid parts is either complicated, complicated or impossible to repair. This caused a great waste. In order to accurately and conveniently repair these parts with complex shapes and free-form surface features, this paper attempts to introduce the surface data acquisition technology in reverse engineering technology, combining with rapid prototyping technology to repair the failure parts. It provides a new repair method for the failure parts of complex surface. The research of this paper includes the following aspects: 1) the overall scheme design of the reverse engineering aided part repair technology, the research of the failure form of the parts used in the repair using this method, and the selection of the digital acquisition method of reverse engineering. As well as the part defect location digital model and rapid prototyping repair of the overall process. 2) the difference between surface data acquisition and general reverse engineering data acquisition is analyzed, and the method of surface data acquisition for repairing parts is put forward. 3) by comparing the surface data of the defective parts with the original CAD model, the digital model of the defective parts is obtained. In this paper, point cloud comparison method and solid comparison method are proposed to obtain the digital model of the defect. 4) using rapid prototyping technology to repair parts. In this paper, different types of rapid prototyping methods are chosen to repair parts according to their different materials. According to the technical characteristics of various rapid prototyping methods, the repairing methods of failure parts are divided into direct repair method and indirect repair method. Finally, the feasibility and practical application value of repairing complex surface parts by combining reverse engineering with rapid prototyping are verified by data collection and rapid prototyping repair of two invalid parts.
【学位授予单位】：南昌大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH13;TP391.72
【引证文献】
相关硕士学位论文 前1条
1 张军强;数字化模型获取技术在模具修复中的应用[D];南昌大学;2012年
，本文编号：2427291
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