扫描轨迹可控的电子束钎焊  

Control on electron beam scanning track in brazing

作　　者：王学东[1] 姚舜[1] 

机构地区：[1]上海交通大学焊接研究所,上海200030

出　　处：《焊接学报》2004年第6期31-34,共4页Transactions of The China Welding Institution

基　　金：国防科工委资助项目

摘　　要：提出一种电子束扫描轨迹和扫描方式控制方法 ,采用二维曲线来描述电子束扫描轨迹 ,根据实际焊缝的形状、扫描区域的尺寸、扫描方式等建立曲线方程 ,并对其进行离散化处理 ,然后经D/A转换产生所需的模拟信号 ,该信号经放大后输入给偏转线圈驱动电子束按设定的扫描轨迹和扫描方式运动。不仅扫描轨迹可根据实际焊接的需要任意编辑 ,而且扫描方式也可任意设定 ,如连续或断续扫描、点、线、区域扫描等 ,使电子束成为可控移动热源 。A control method of electron beam scanning track and scanning mode was put forward, in which the curvilinear equations describing the electron beam scanning track were established according to the shape of the actual welding seam, the size of scanning region, scanning mode etc., then the equations were discretized to obtain a series of discrete coordinate components which were used to generate the analog signals by D/A, after being magnified the signals were input to the deflection coil to drive the electron beam to move following the predefined scanning track and mode. Not only scanning track can be easily edited according to actual welding requirements, but also the scanning mode can be set easily such as continuous or discontinuous scanning, points and lines scanning, region scanning, any complicated scanning graph etc. This makes electron beam become controllable and movable welding heat source, and this method has been used in electron beam brazing successfully.

关 键 词：电子束 扫描轨迹 扫描方式 钎焊 

分 类 号：TG156[金属学及工艺—热处理]