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合肥钣金加工浅谈激光焊系统及控制
 

激光焊接过程控制系统(见图二)以焊接接头和焊接特性为过程控制变量,将这些焊接变量和诸如激光源、送丝速度、电压和焊缝跟踪系统等传统变量集成到一个闭环控制和检测系统中。激光焊接工艺控制系统(如图所示)包括中央处理器和多个子系统。除了过程控制外,系统还可以在焊接过程中提取焊接质量特征,并提供快速的焊接质量报告。

合肥钣金加工浅谈激光焊系统及控制

中央处理单元是控制系统的核心部分。它控制各个子系统之间的实时通信,定义焊接工艺参数,并根据其他子系统的输入,实时调节工艺参数。焊缝跟踪:焊缝跟踪子系统采用激光三角原理,根据图像提取数据,得到关节的理论精确位置,计算坡口尺寸和焊缝位置。


焊接质量监测和熔池监测:焊缝质量监测是基于焊缝轮廓数据的测量来计算角焊缝的尺寸,并确定产生的气孔或裂纹。利用熔池监控的视觉传感子系统对焊接熔池进行观察,分析焊接件的体积和焊缝的均匀性。


Laser welding process control system (see Fig. two) takes joints and welding characteristics as process control variables, and integrates these welding variables and more traditional variables, such as laser source, wire feeding speed, voltage and seam tracking system into a closed loop control and detection system. The laser welding process control system (as shown in the diagram) includes a central processor and a plurality of sub-systems. In addition to process control, the system extracts welding quality characteristics during the welding process and provides rapid welding quality report.

The central processing unit is the core of the control system. It controls the real-time communication between different subsystems, defines the welding process parameters, and regulates the process parameters in real time according to the input of other subsystems.
Seam tracking: the seam tracking subsystem uses the laser triangle principle, according to the image extraction data, we can get the theoretical precise location of the joint and calculate the groove size and weld location.

Weld quality monitoring and weld pool monitoring: the weld quality monitoring is based on the measurement of the weld profile data to calculate the size of the fillet weld, and to determine the generated pores or cracks. The weld pool is observed by the visual sensing subsystem of the molten pool monitoring, and the volume of the welded parts and the uniformity of the weld are analyzed.


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