基于逆向工程的齿面修复技术研究

发布时间：2018-05-28 17:57

本文选题：直齿轮 + 逆向工程　；参考：《东北石油大学》2017年硕士论文

【摘要】：齿轮传动是目前运用最普遍的机械传动方式之一,具备高效、精密、稳定、传动方式多样等特性,能满足复杂的生产工艺需求。随着科技进步与生产需求的提高,齿轮传动也逐渐向更精密、更复杂、寿命更长的方向发展,齿轮结构更复杂、尺寸更大型、精度要求更严格,备受国内外工业领域的重视。但在实际生产工况下,个别齿轮的局部失效将导致整套设备乃至整条生产线瘫痪,给生产带来不可逆转的损失,因此齿轮失效的预防与修复一直是国内外学者研究的重中之重。但是传统的修复方法应用局限性大、修复时间长且修复精度不高,一些方法只能暂时维持生产并未从实质上对失效齿轮进行修复。而随着再制造概念的提出,如何快速、精确地对失效零件进行修复使其质量达到甚至超过新品的质量成为研究的热点问题。本文根据逆向工程与NURBS曲面的基本理论,以渐开线圆柱直齿轮为例进行了以下几方面的研究,旨在更快速、更精确地修复失效齿轮。在研究直齿轮的数学表达、加工成型等理论的基础上,结合逆向工程表面数据采集方法的特点,提出基于特征点反求直齿轮参数的方法,给出特征点选择和加工参数反求的计算理论。利用三坐标测量设备对已知参数的失效直齿轮进行实验,验证了这种方法的正确性。对缺损区域重构方法进行研究,提出了针对轮齿断裂截面的最优测量方法与缺损部位重构的方法。研究的关键在于NURBS理论在轮齿断裂截面拟合重构上的应用,并在失效直齿轮上成功地进行了实验验证。
[Abstract]:Gear transmission is one of the most widely used mechanical transmission methods at present. It has the characteristics of high efficiency, precision, stability and variety of transmission modes, and can meet the needs of complex production technology. With the progress of science and technology and the improvement of production demand, gear transmission is gradually developing towards more precise, more complex and longer life. The structure of gear is more complex, the size is larger, and the precision requirement is more stringent. However, under the actual production conditions, the partial failure of individual gears will lead to the paralysis of the whole equipment and even the whole production line, which will bring irreversible losses to the production. Therefore, the prevention and repair of gear failure has always been the most important research focus of domestic and foreign scholars. However, the traditional repair methods are limited in application, long repair time and low precision. Some methods can only maintain the production temporarily and do not repair the failure gear in essence. With the development of the concept of remanufacturing, how to repair failure parts quickly and accurately so that their quality can reach or exceed the quality of new products has become a hot issue. Based on the basic theory of reverse engineering and NURBS surface, this paper takes involute cylindrical spur gear as an example to study the following aspects, in order to repair the failure gear more quickly and accurately. On the basis of studying the mathematical expression, machining and forming theory of spur gear and combining the characteristics of surface data acquisition method of reverse engineering, a method of inversely calculating the parameters of spur gear based on feature point is put forward. The calculation theory of feature point selection and machining parameter inversion is given. The validity of this method is verified by the experiment of three-coordinate measuring equipment on the failed spur gear with known parameters. The method of reconstruction of defect region is studied, and the optimal measuring method for fracture section of gear tooth and the method of reconstruction of defect site are proposed. The key point of the study is the application of NURBS theory to the fitting and reconstruction of the broken section of the gear teeth, and the experimental results have been successfully verified on the failed spur gears.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TH132.41

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