车身3D打印轨迹优化研究

发布时间：2018-03-29 10:53

  本文选题：快速成型　切入点：车身覆盖件　出处：《大连理工大学》2016年硕士论文

【摘要】：随着“中国制造2025”等国家政策措施对发展增材制造技术的扶持以及3D打印技术可以带来的巨大利益驱使,国内众多科研机构加大了对这一制造技术的资金和人才投入。随着研究的不断深入和市场的积极开拓,增材制造技术飞速发展、日臻完善,己走出实验室并在汽车、航空航天、工业设备、生物医药工程、食品加工、微纳制造等众多领域获得了广泛的应用。《中国制造2025》的出台加速了中国制造业的转型升级,也使得越来越多的制造企业开始将目光投向“3D打印”这一战略性新兴产业。因其加工制造灵活性强、无需开发设计模具等特点,在汽车工业方面主要应用于设计开发领域和零部件制造领域。汽车是一个大批量生产的产品,3D打印的加工效率问题决定其更适合于个性化、小批量产品的生产。如何提高3D打印加工效率也成为了一个亟待解决的重要技术问题。本文研究对象是FDM工艺中Zigzag填充扫描加工轨迹优化问题,优化目标是提高3D打印加工效率。首先建立了3D打印的运动学模型,在机构运动学参数的约束下,研究了3D打印的最优填充扫描方向问题。通过实例验证了填充扫描速度、填充扫描加速度、填充扫描线宽度是最优填充扫描方向的影响因素。为了解决扫描线连接处步进电机多次启停的问题,采用贝塞尔曲线优化了扫描线的连接方式,改变了填充扫描线连接处的运动学模型,引入样条曲线插补的原理,并采用龙格库塔算法求解插补参数,从而计算曲线连接处的加工时间。对于复杂平面轮廓的填充扫描,本文提出了一种区域分割算法,可将平面轮廓分割成若干个可以连续加工的子区域。该算法减少了喷头跨越内孔等非加工区域的抬刀次数,空行程仅发生在区域连接时。最后通过实例验证了该算法的有效性及正确性,对提高3D打印效率具有重要的研究意义。
[Abstract]:With the support of national policies and measures such as "made in China 2025" and the huge benefits that 3D printing technology can bring, Many domestic scientific research institutions have increased their capital and human resources investment in this manufacturing technology. With the continuous deepening of research and the active development of the market, the material increasing manufacturing technology has developed rapidly and is becoming more and more perfect. Industrial equipment, biomedical engineering, food processing, micro-nano manufacturing and many other fields have been widely used. The introduction of "made in China" accelerated the transformation and upgrading of China's manufacturing industry. As a result, more and more manufacturing enterprises are beginning to focus on the strategic emerging industry of "3D printing". Because of its strong flexibility in processing and manufacturing, it does not need to develop and design molds and other characteristics. It is mainly used in the field of design and development and in the field of parts and components manufacture in automobile industry. The efficiency of 3D printing of automobile is a mass production product, which is more suitable for individuation. How to improve the efficiency of 3D printing has also become an important technical problem to be solved urgently. This paper focuses on the optimization of Zigzag filling and scanning machining trajectory in FDM process. The optimization goal is to improve the processing efficiency of 3D printing. Firstly, the kinematics model of 3D printing is established. The optimal filling scanning direction of 3D printing is studied under the constraint of kinematics parameters of the mechanism. The filling scanning speed is verified by an example. In order to solve the problem of multiple start and stop of stepper motor in scan line connection, Bezier curve is used to optimize the connection mode of scan line, in order to solve the problem that the scan direction is affected by filling scan acceleration and filling scan line width. In this paper, the kinematics model of filling scanning line joint is changed, the principle of spline curve interpolation is introduced, and the interpolation parameters are solved by Runge-Kutta algorithm, so as to calculate the processing time at the junction of curve. In this paper, a region segmentation algorithm is proposed, in which the planar contour can be divided into several sub-regions that can be continuously machined. The empty stroke only occurs in the area connection. Finally, the validity and correctness of the algorithm are verified by an example, which is of great significance to improve the efficiency of 3D printing.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：U463.82

【参考文献】

中国期刊全文数据库 前10条

1 叶军祥;;3D打印在汽车行业中的应用[J];内燃机与配件;2016年02期

2 吴勇毅;陈渊源;;《中国制造2025》上的3D打印“国家战略”[J];上海信息化;2015年10期

3 牛锐敏;;3D打印汽车呼之欲出[J];汽车科技;2014年06期

4 程美;;3D打印技术及其在汽车制造业中的创新应用[J];模具制造;2014年08期

5 李小丽;马剑雄;李萍;陈琪;周伟民;;3D打印技术及应用趋势[J];自动化仪表;2014年01期

6 谷祖威;于慧;;3D打印技术对汽车零部件制造业的影响[J];现代零部件;2013年09期

7 卢秉恒;李涤尘;;增材制造(3D打印)技术发展[J];机械制造与自动化;2013年04期

8 卫洪春;彭小利;;扫描线多边形区域填充算法研究[J];四川文理学院学报;2012年05期

9 陈伟华;张铁;;三次均匀有理B样条曲线插补算法的研究[J];机械设计与制造;2010年08期

10 朱传敏;唐s，

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