摘要
    随着国内工程机械行业的快速发展,挖掘机市场的竞争也日趋激烈,各主机厂不但从成本上,也在质量上展开了激烈的竞争。动臂部分,作为挖掘机最重要的承载结构,在工作中承受着绝大多数的载荷,是最常发生故障的部分,而其中尤以动臂的失效影响最大,动臂质量成为影响整机产品可靠性的因素之一。 我国生产的挖掘机从仿制开始起步，近期产品的质量较早期有所提高。但受国产对挖掘机的焊接质量及设计水平等的影响，我国目前生产的挖掘机的总体水平，与进口产品及港口用户的要求仍有较大差距，焊接工艺之间的差距尤为明显，为满足市场及焊接工艺需求，对挖掘机焊接工艺进行深层次的研究和分析势在必行！
    本设计课题来自于企业的生产实际，通过对挖掘机焊接工艺进行分析和设计，掌握挖掘机焊接的整个生产流程，培养工程意识。随着国家经济的繁荣及基础建设的飞速发展，挖掘机的应用及需求日益增长。然而在挖掘机生产制造过程中的动臂焊接工艺成为挖掘机整机质量及性能的重要决定因素，焊接变形的控制对挖掘机动臂焊接工艺有着重要的意义。
 
关键词：行业；挖掘机；焊接工艺；意义

Abstract
 For a lot of special places, like the risk is very big, or we are difficult to reach, such as disarm bombs, unknown corresponding domains such as detection, probing deep of more dangerous situation usually need to implement the robot.It’s a main part of robot for micro pedipulator, walking robots and more than six feet, compared to the eight legged robot, because of strong bearing capacity, good stability, which the meritss is simple construction, So a large number of researchers around the world, start .This paper mainly to the four bar mechanism as the main execution elements to design of micro walking the whole scheme of the four bar mechanism.
 Its principle is diagonal synchronization, leg activity by the structure of the crank rocker, front leg movements around the same, it detailed performance curve characteristics of the connecting rod,when the curve trajectory diagonal straight line segment, the robot is stationary, the motion trajectory when the diagonal curve is slanting line do the walking. 
 
Keywords：Manufacturing ,Location, Clamping, Process
目 录