光固化快速成型工艺参数的优化研究
发布时间：2018-11-13 17:11
【摘要】：光固化快速成型技术是快速成型制造技术中最早发展起来的,也是目前研究较为深入的一种快速成型技术。该技术适合于新产品的开发、不规则或复杂形状零件制造,如具有复杂形面的飞行器模型和风洞模型、外观评估和装配检验、快速反求与复制,也适用于难加工材料的制造。这项技术不仅在制造业具有广泛的应用,而且在材料科学与工程、医学、文化艺术等领域也有广阔的应用前景。 近些年国内研发出了以紫外光作为主要光源的光固化快速成型机,这类机器的设备造价和运行成本都明显低于激光成型机,但是成型精度较差。本文以紫外光快速成型精度问题为主要研究对象,以CPS350快速成型机为实验设备,在理论分析的基础上,进行大量基础性实验研究。 本文从理论上介绍光固化快速成型的基本原理,并系统的分析了成型的前期数据处理、成型加工过程和后处理三个阶段各因素对成型精度的影响。 针对光敏树脂溶胀性问题,进行了实验分析；应用反求技术对异形件进行数据采集及建模,然后对实验后出现的尺寸偏差及其变化规律等问题,进行进一步的实验,可以总结出扫描线长、树脂性能及扫描系统加减速运动等因素对成型制件精度的影响规律,从而提出光扫描运动控制系统在换向阶段采用变加速度运动方式的改进措施。针对实验中出现的X型缺陷,提出增加可控遮光系统的观点。 由于影响光固化快速成型制件精度的工艺参数有很多,本文以三方向尺寸误差为测量指标,设计并进行四因素三水平的正交试验,利用方差分析的方法,研究扫描速度、光斑补偿、分层厚度和扫描间距对成型制件精度的影响规律,并试图给出一定范围内的最佳工艺参数组合。 同时,提出了改进成型制件精度的措施和方法,对紫外光快速成型技术的发展有一定的指导意义。
[Abstract]:The rapid prototyping technology of light curing is the earliest developed in the rapid prototyping manufacturing technology, and it is also a kind of rapid prototyping technology studied more deeply at present. This technology is suitable for the development of new products, the manufacture of irregular or complex shape parts, such as the aircraft model and wind tunnel model with complex shape surface, appearance evaluation and assembly inspection, rapid reverse calculation and reproduction, and also suitable for the manufacture of difficult to be machined material. This technology not only has a wide application in manufacturing industry, but also has a broad application prospect in material science and engineering, medicine, culture and art and so on. In recent years, a light curing rapid prototyping machine with ultraviolet light as the main light source has been developed in China. The equipment cost and operation cost of this kind of machine are obviously lower than that of laser molding machine, but the forming accuracy is poor. In this paper, the precision of UV rapid prototyping is taken as the main research object, and the CPS350 rapid prototyping machine is used as the experimental equipment. On the basis of theoretical analysis, a large number of basic experimental studies are carried out. In this paper, the basic principle of light curing rapid prototyping is introduced in theory, and the influence of three factors on the forming precision is analyzed systematically, such as the data processing in the early stage, the process of forming and the post-processing. The swelling property of Guang Min resin was analyzed experimentally. The data acquisition and modeling of the special-shaped parts are carried out by using reverse engineering technology. Then, the scanning line length can be summed up by further experiments on the problems such as the size deviation and its variation law after the experiment. The influence of resin properties and acceleration and deceleration motion of scanning system on the precision of forming parts is discussed. Therefore, the improvement measures of variable acceleration motion mode in the phase of commutation of optical scanning motion control system are put forward. Aiming at the X-type defect in the experiment, the idea of adding controllable shading system is put forward. Because there are many technological parameters that affect the precision of photocuring rapid prototyping, this paper designs and carries out the orthogonal experiment with four factors and three levels, and studies the scanning speed by means of variance analysis, taking the three-direction dimension error as the measuring index. The effect of spot compensation, layer thickness and scanning spacing on the precision of the forming parts is discussed. The optimum process parameters are also given in a certain range. At the same time, the measures and methods to improve the precision of forming parts are put forward, which is of certain guiding significance to the development of UV rapid prototyping technology.
【学位授予单位】：沈阳工业大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH16
本文编号：2329800
[Abstract]:The rapid prototyping technology of light curing is the earliest developed in the rapid prototyping manufacturing technology, and it is also a kind of rapid prototyping technology studied more deeply at present. This technology is suitable for the development of new products, the manufacture of irregular or complex shape parts, such as the aircraft model and wind tunnel model with complex shape surface, appearance evaluation and assembly inspection, rapid reverse calculation and reproduction, and also suitable for the manufacture of difficult to be machined material. This technology not only has a wide application in manufacturing industry, but also has a broad application prospect in material science and engineering, medicine, culture and art and so on. In recent years, a light curing rapid prototyping machine with ultraviolet light as the main light source has been developed in China. The equipment cost and operation cost of this kind of machine are obviously lower than that of laser molding machine, but the forming accuracy is poor. In this paper, the precision of UV rapid prototyping is taken as the main research object, and the CPS350 rapid prototyping machine is used as the experimental equipment. On the basis of theoretical analysis, a large number of basic experimental studies are carried out. In this paper, the basic principle of light curing rapid prototyping is introduced in theory, and the influence of three factors on the forming precision is analyzed systematically, such as the data processing in the early stage, the process of forming and the post-processing. The swelling property of Guang Min resin was analyzed experimentally. The data acquisition and modeling of the special-shaped parts are carried out by using reverse engineering technology. Then, the scanning line length can be summed up by further experiments on the problems such as the size deviation and its variation law after the experiment. The influence of resin properties and acceleration and deceleration motion of scanning system on the precision of forming parts is discussed. Therefore, the improvement measures of variable acceleration motion mode in the phase of commutation of optical scanning motion control system are put forward. Aiming at the X-type defect in the experiment, the idea of adding controllable shading system is put forward. Because there are many technological parameters that affect the precision of photocuring rapid prototyping, this paper designs and carries out the orthogonal experiment with four factors and three levels, and studies the scanning speed by means of variance analysis, taking the three-direction dimension error as the measuring index. The effect of spot compensation, layer thickness and scanning spacing on the precision of the forming parts is discussed. The optimum process parameters are also given in a certain range. At the same time, the measures and methods to improve the precision of forming parts are put forward, which is of certain guiding significance to the development of UV rapid prototyping technology.
【学位授予单位】：沈阳工业大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH16
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