【作者】 张春燕；

【导师】 祁文军；

【作者基本信息】 新疆大学 ， 材料加工工程， 2009， 硕士

【摘要】 本文研究的是车体焊装夹具中的重要部分——轿车车体后地板的焊装夹具设计,生产线设计及点焊机器人焊接轨迹仿真。全文首先介绍了轿车车体的特点、焊装线及夹具设计要求,这是车体焊装线及夹具设计的基础;然后根据焊接的要求,对车体焊接中最常用的点焊技术做了详细介绍,对激光焊等技术做了简要说明。重点是对后地板进行三维夹具设计和分析。具体设计过程是:首先,依据待焊工件的特点,确定了两种设计方案,并进行评价,特别对实际采用方案重点进行了结构分析;然后,对设计好的夹具每个单元进行模拟、检查干涉,并介绍了焊钳的设置原则。整个夹具三维设计过程体现了柔性焊装生产思想。再次,结合车间具体情况,对后地板焊装总线进行规划、设计。最后,完成了三维夹具的二维图绘制,包括基准图绘制和元件尺寸标注。同时,二维尺寸标注部分不但详细介绍了尺寸、公差的标注原则和方法,给出了生产加工的工艺要求,而且用具体例子进行验证。文中采用焊装夹具设计方法也可以用于轿车车体其他部分的夹具设计,具有一定的通用性。对后地板焊接点焊机器人轨迹具体模拟分析部分:采用DELMIA软件对焊接机器人进行模拟,进行焊接路径规划,确定机器人型号、台数及焊钳可达性,最终希望能生成焊接轨迹代码,将生成的代码传入焊接机器人控制系统内,使焊接机器人按照模拟的轨迹运行,以减少调试时间。本研究设计了机器人焊接轿车后地板左后侧梁分总成31个焊点的运动路径,运用DELMIA设计并运行,证明了该路径的合理性。更多还原

【Abstract】 In this paper, the important part of body welding fixture——rear floor of the car body welding fixture design and production line design are researched, And spot welding robot body trajectory is simulated. The characteristics of the car body and design for welding line and fixture are introduced at the first of the text. Then, in accordance with the requirements of welding, spot welding techniques are described in detail which are used in Welding of the body, other kind of welding like laser welding techniques are briefly described.The fixture of the rear floor body’s three-dimensional design and analysis is focused on, Specific design process is: Firstly, two types of design proposals are identified and assessed based on the characteristics of items to be welded, A structural analysis of the practical application proposal is particular conducted.Then, Simulation is carried out for each unit to check interference of the designed fixture. And the principle of setting welding gun is introduced. The thinking of flexible assembly is reflected throughout the process of three-dimensional fixture design. That after, Combined with the specific circumstances of the workshop, rear floor’welding assembly line is designed and planned. Finally, Two-dimensional works of three-dimensional jig mapping is completed, including benchmarks and component mapping dimension. Meanwhile, Dimensioning of two-dimensional part is not only detailed information on size, tolerance principles and methods of marking, production and processing requirements of the process is given, but also specific examples are given to verified. The design method in the paper used for welding fixture can also use for other parts car body’s design. Spot welding robot body trajectory simulation are as follows: Using DELMIA software to simulate the welding robot and plan welding path to ensure robot’s type、number and welding guns’reach. The Path planning is the most influential factors in robot itself, so as to focus on the control of robot itself. Ultimately hope to generate welding trajectory code. In order to reduce the debugging time, use DELMIA application to design the robot welding car’s left behind rear floor beam thirty-one of the movement path spot and run a simulation example to show the rationality of the path.更多还原