光电工程, 2017, 44 (8): 837, 网络出版: 2017-12-01  

The laser shock processing control system

The laser shock processing control system
作者单位
Shenyang Institute of Automation Chinese Academy of Science, Shenyang 110176, China
摘要
Abstract
A control system for complex curved surface laser shock processing was introduced, which was a set of automatic and digital control system operation, and controlled by the industrial PC/PLC. And it completed the real-time online monitoring and information interaction feedback, belonging to the open distributed system, by the fact that the re-mote monitoring and control system status of processing effectively avoid the occurrence of major accidents. This system was laser shock processing core device (including laser, robot, auxiliary control, quality testing device and auxiliary system, etc.), that implemented each link of information interaction and systems work together. By the remote monitoring, control system status of processing effectively avoided the occurrence of major accidents. At the same time, the control system added process of laser shock processing test data record function. According to actual demand parameters database called the background, parameter optimization was processed effectively. In addition, the system also could realize laser shock processing model established, complex surface machining trajectory plan-ning automatically and processing strategy. The system can realize the automatic production of the whole blade la-ser impact of aero engine, and it is already in the engineering application stage. In view of the problem that the pre-sent domestic industrialization level of laser shock peening equipment is not high, a laser shock peening equipment is developed by using fixed optical system structure and modular design method. The design scheme of laser shock peening equipment, the characteristics of laser optical path arrangement and the system control method are ana-lyzed, and the technical indexes of laser shock peening equipment are tested. Keep room temperature stable at (22 ± 2) ℃ and 20 minutes after the device is switched on. The technical parameters such as the maximum output single pulse energy up to 25 J, energy instability <3%, pulse width which can be continuously adjustable between 16 ns and 20 ns, pulse width instability <±1 ns, beam divergence <2.5 mrad, beam points instability<50 μrad, the repetition frequency of 0.5 Hz ?5 Hz are achieved. The transmission efficiency of the optical system is about 92%. The thick-ness of the constraint layer is uniform and the flow rate is continuously controlled. The test results show that the performance of the laser shock peening equipment is good.

Ying Lu, Jibin Zhao, Hongchao Qiao. The laser shock processing control system[J]. 光电工程, 2017, 44(8): 837. Ying Lu, Jibin Zhao, Hongchao Qiao. The laser shock processing control system[J]. Opto-Electronic Engineering, 2017, 44(8): 837.

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