基于弧面凸轮的分度与摆动组合传动装置设计及动力学仿真
发布时间：2018-11-15 07:50
【摘要】：制造业体现了一个国家的生产力水平,未来制造业水平的提升离不开自动生产线的发展,机械传动部分作为生产线的主体,势必要对其传动速度、精度、自动化程度提出更高标准。由于生产工艺的要求,机械传动部分往往需要实现周期性的分度以及摆动动作等,而现有的传动装置或机构大多只能实现单一的分度或摆动动作,需要分别进行控制,传动精度不高,整个传动系统复杂,也不符合现代制造集成化的要求,逐渐要被市场所淘汰。针对目前的现状,本文在现有弧面凸轮机构的基础上提出了一种应用于自动生产线的分度与摆动组合传动装置,主要从以下几个方面进行研究。(1)建立弧面凸轮的数学模型。利用弧面凸轮滚轴迹面的直纹面特征以及实际廓面与其互为等距曲面的特点,提出了采用等距曲面法建立方程的方法,建立了弧面凸轮通用廓面方程。对弧面凸轮机构的初始位置进行分析,并对压力角和曲率特性进行研究。最后设计一算例,证明所建数学模型的正确性,此方法大大简化了弧面凸轮廓面分析和求解过程。(2)设计一种基于弧面凸轮的分度与摆动组合传动装置,取代原有只能实现单一运动的传统间歇机构或装置。对该装置进行结构设计,之后为满足生产线中两工序之间大摆角要求,设计了180°摆角的弧面摆动凸轮机构,最后以LED分光机传送料系统为设计实例,计算了装置各尺寸。(3)总结分析了现有对弧面凸轮的建模方式,采用基于等距曲面原理的方法完成对弧面凸轮的建模。创建传动装置的各个零件的实体模型之后,在Pro/E的装配环境中,将已经建立好的各个零部件模型按照之前的设计进行装配,确定无误后,为了更加清晰地反应传动装置的结构组成,生成装置工程图。(4)对传动装置进行动力学仿真。首先在ADAMS软件中对装置的多刚体模型的角位移、角速度、角加速度测试,通过分析仿真结果,表明本装置的设计及建模过程是正确的,之后在ANSYS软件中对传动轴进行了模态分析,重点阐述了传动轴柔性化过程,将处理后的传动轴导入ADAMS中建立装置的刚柔耦合模型,选取输出端角加速度作为研究对象进行动力学仿真,验证本装置是否满足设计要求。
[Abstract]:The manufacturing industry embodies the level of productivity of a country. In the future, the upgrading of the manufacturing industry level cannot be separated from the development of the automatic production line. As the main part of the production line, the mechanical transmission part is bound to have a bearing on the speed and accuracy of its transmission. The degree of automation sets higher standards. Because of the requirement of production technology, the mechanical transmission part often needs to realize periodic indexing and swing action, but most of the existing transmission devices or mechanisms can only realize a single indexing or swinging movement, which need to be controlled separately. The transmission accuracy is not high, the whole transmission system is complex and does not meet the requirements of modern manufacturing integration, and will be gradually eliminated by the market. In view of the present situation, this paper presents a combined indexing and swinging transmission device for automatic production line based on the existing globoidal cam mechanism. The main contents are as follows: (1) the mathematical model of globoidal cam is established. Based on the characteristics of the straight line surface of the globoidal cam roller trace surface and the fact that the actual profile surface is equidistant with each other, the method of establishing the equation by using the equidistant surface method is proposed, and the general profile equation of the globoidal cam is established. The initial position of globoidal cam mechanism is analyzed, and the pressure angle and curvature characteristics are studied. Finally, an example is designed to prove the correctness of the established mathematical model. This method greatly simplifies the analysis and solution process of the globoidal cam profile. (2) A combined indexing and swinging transmission device based on the globoidal cam is designed. To replace a traditional intermittent mechanism or device that can only achieve a single motion. The structure of the device is designed. In order to meet the requirement of large swing angle between two processes in the production line, the globoidal swing cam mechanism with 180 掳swing angle is designed. Finally, the transmission material system of LED spectrometer is taken as a design example. The various dimensions of the device are calculated. (3) the existing modeling methods of the globoidal cam are summarized and analyzed, and the method based on the principle of equidistant surface is adopted to complete the modeling of the globoidal cam. After creating the solid model of each part of the transmission device, in the assembly environment of Pro/E, the various parts models that have already been established are assembled according to the previous design. In order to make the structure of the device more clear, the engineering drawings of the device are generated. (4) the dynamic simulation of the transmission device is carried out. First, the angular displacement, angular velocity and angular acceleration of the multi-rigid body model of the device are tested in ADAMS software. The simulation results show that the design and modeling process of the device is correct. Then the modal analysis of the transmission shaft is carried out in the ANSYS software, and the flexible process of the drive shaft is expounded, and the rigid-flexible coupling model of the device is established by importing the treated transmission shaft into the ADAMS. The angular acceleration at the output end is chosen as the research object for dynamic simulation to verify whether the device meets the design requirements.
【学位授予单位】：济南大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TH132.47
本文编号：2332641
[Abstract]:The manufacturing industry embodies the level of productivity of a country. In the future, the upgrading of the manufacturing industry level cannot be separated from the development of the automatic production line. As the main part of the production line, the mechanical transmission part is bound to have a bearing on the speed and accuracy of its transmission. The degree of automation sets higher standards. Because of the requirement of production technology, the mechanical transmission part often needs to realize periodic indexing and swing action, but most of the existing transmission devices or mechanisms can only realize a single indexing or swinging movement, which need to be controlled separately. The transmission accuracy is not high, the whole transmission system is complex and does not meet the requirements of modern manufacturing integration, and will be gradually eliminated by the market. In view of the present situation, this paper presents a combined indexing and swinging transmission device for automatic production line based on the existing globoidal cam mechanism. The main contents are as follows: (1) the mathematical model of globoidal cam is established. Based on the characteristics of the straight line surface of the globoidal cam roller trace surface and the fact that the actual profile surface is equidistant with each other, the method of establishing the equation by using the equidistant surface method is proposed, and the general profile equation of the globoidal cam is established. The initial position of globoidal cam mechanism is analyzed, and the pressure angle and curvature characteristics are studied. Finally, an example is designed to prove the correctness of the established mathematical model. This method greatly simplifies the analysis and solution process of the globoidal cam profile. (2) A combined indexing and swinging transmission device based on the globoidal cam is designed. To replace a traditional intermittent mechanism or device that can only achieve a single motion. The structure of the device is designed. In order to meet the requirement of large swing angle between two processes in the production line, the globoidal swing cam mechanism with 180 掳swing angle is designed. Finally, the transmission material system of LED spectrometer is taken as a design example. The various dimensions of the device are calculated. (3) the existing modeling methods of the globoidal cam are summarized and analyzed, and the method based on the principle of equidistant surface is adopted to complete the modeling of the globoidal cam. After creating the solid model of each part of the transmission device, in the assembly environment of Pro/E, the various parts models that have already been established are assembled according to the previous design. In order to make the structure of the device more clear, the engineering drawings of the device are generated. (4) the dynamic simulation of the transmission device is carried out. First, the angular displacement, angular velocity and angular acceleration of the multi-rigid body model of the device are tested in ADAMS software. The simulation results show that the design and modeling process of the device is correct. Then the modal analysis of the transmission shaft is carried out in the ANSYS software, and the flexible process of the drive shaft is expounded, and the rigid-flexible coupling model of the device is established by importing the treated transmission shaft into the ADAMS. The angular acceleration at the output end is chosen as the research object for dynamic simulation to verify whether the device meets the design requirements.
【学位授予单位】：济南大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TH132.47
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