摘要夹具作为机械制造业的一种重要工艺装备，它的设计与制造会直接影响到产品的研发周期和质量。缩短夹具设计周期，是计算机辅助夹具设计研究的重要领域，也是提高企业快速反应能力的一个重要环节。管件种类繁多，且空间走向各异，加上管件焊接对于管件两端的几何关系有着严格的要求，这些都增加了管件焊接的难度。目前来说，管件焊接的定位和夹紧主要是依靠操作人员的经验，这大大降低了管件焊接的精度。该设计提供一套可以夹持焊接管件并精确定位多管件及管件与法兰之间的相对位置，同时还适宜不同尺寸、多样化的空间走势的管件焊接柔性夹具。通过对夹具、管件装夹方案进行运动仿真，检验装夹方案的正确性，对操作人员进行指导，从而提高效率、降低成本、提高焊接精度。

针对上述现实问题，本文在已有管件焊接夹具设计工作的基础上进一步完善了其结构设计，扩展了管件焊接夹具装夹方案智能CAD系统的功能，开发了在ADAMS软件基础上的管件焊接夹具智能仿真模块，本文的主要研究工作包括以下几个方面：49810

(1) 调研收集分析有关资料，整理有关焊接管件图纸及焊接工艺资料；

(2) 制定管件安装规则与工艺，开发管件安装方位计算软件，根据管件的变化，按照决策规则能够自动计算管件的安装位置，计算装夹定位点坐标；

(3) 根据装夹定位点坐标进行夹具系统三维虚拟仿真；

(4) 利用Visual Basic语言对Solid Edge软件进行二次开发，提取管件和装配体的特征信息，实现焊接管件的优化布置并生成夹具的装夹方案；

(5) 结合C语言和cmd语言对ADAMS软件进行二次开发实现了焊接夹具的虚拟仿真。

毕业论文关键词：柔性夹具；管件焊接；运动仿真；ADAMS二次开发

 Abstract

Fixture as an important machinery manufacturing technology and equipment, it will directly affect the design and manufacture of the product development cycle and quality. Shorten the fixture design cycle, and is aided fixture design important area of research, but also improve rapid response capabilities is an important part. A wide range of pipe fittings and spatial orientation varies, plus pipe welded pipe ends for the geometric relationship has strict requirements, which have increased the difficulty of welding pipe fittings. Currently, the pipe welding positioning and clamping mainly rely on the operator's experience, which greatly reduces the precision welding pipe fittings. The design provides a weld fittings can clamp and more precise positioning of pipe and fittings and the relative position between the flanges, but also suitable for different sizes, a wide range of spatial movement of the flexible pipe welding fixture. Through the fixtures, fittings clamping motion simulation program to test the correctness of clamping scheme, to guide the operator to improve efficiency, reduce costs, improve welding accuracy.

In response to these practical problems, this paper has pipe welding fixture design based on the work to further improve its structural design, extends the pipe welding fixture clamping scheme intelligent CAD system functionality, developed in ADAMS software based on pipe welding fixture Smart simulation module, the main research work includes the following aspects:

（1）collect and analyze relevant information research, collate relevant weld pipe fittings drawings and welding process information;

（2） development of pipe installation rules and technology, the development pipe mounting orientation calculation software, according to changes in tube according to decision rules can be calculated automatically pipe installation location point coordinate calculation clamping positioning.