激光冲击强化设备的开发

胡太友, 乔红超, 赵吉宾, 等. 激光冲击强化设备的开发[J]. 光电工程, 2017, 44(7): 732-737. doi: 10.3969/j.issn.1003-501X.2017.07.010
引用本文: 胡太友, 乔红超, 赵吉宾, 等. 激光冲击强化设备的开发[J]. 光电工程, 2017, 44(7): 732-737. doi: 10.3969/j.issn.1003-501X.2017.07.010
Taiyou Hu, Hongchao Qiao, Jibin Zhao, et al. Development of laser shock peening equipment[J]. Opto-Electronic Engineering, 2017, 44(7): 732-737. doi: 10.3969/j.issn.1003-501X.2017.07.010
Citation: Taiyou Hu, Hongchao Qiao, Jibin Zhao, et al. Development of laser shock peening equipment[J]. Opto-Electronic Engineering, 2017, 44(7): 732-737. doi: 10.3969/j.issn.1003-501X.2017.07.010

激光冲击强化设备的开发

  • 基金项目:
    国家自然科学基金资助项目(51501219)
详细信息
    通讯作者: 乔红超, E-mail: hcqiao@sia.cn
  • 中图分类号: TN249

Development of laser shock peening equipment

  • Fund Project:
More Information
  • 针对目前国内激光冲击强化设备工业化程度不高的问题,采用固定光路系统结构形式和模块化设计方法,研制了一款激光冲击强化设备。分析了激光冲击强化设备的设计方案、激光光路布置特点以及系统控制方法,并对激光冲击强化设备技术指标进行了测试。保持室温在(22±2) ℃以内,设备开机20 min后,输出最大脉冲能量可达25 J,能量波动范围不超过3%,脉宽在16 ns~20 ns之间连续可调,波动范围在-1 ns~1 ns以内,光束的发散角小于2.5 mrad,光束指向波动小于50 μrad,重复频率0.5 Hz~5 Hz可调,光路系统的传输效率约为92%,约束层厚度均匀、且流量连续可控。测试结果表明,激光冲击强化设备的各项性能良好。

  • Abstract: Laser shock peening is a new type of metal surface modification technology. Compared to the traditional strengthening method, its enhancement effect and applicability are better. The applications of laser shock peening technology are closely related to the equipment development technology. At present, foreign countries have developed a series of laser shock enhancement equipments, but there is a big gap between domestic and foreign countries because of the late start and foreign related technology blockade, mainly for the performance of equipment instability, poor environmental adaptability and low degree of automation control. It is difficult to achieve industrial production applications. In view of the above problems, a fixed optical system structure and modular design method are used to develop a laser shock peening equipment. It can complete the processing of aero engine blade with once clamping, and has a high degree of automation and high precision characteristics. Laser shock peening equipment is mainly composed of the control system, high-energy pulse laser, optical shaping system, trajectory robot, water supply robot, monitoring system and other modules. Under the coordination of the control system, the laser outputs short pulse high energy, and laser beam forms a different mode of laser through the optical path shaping system. Meanwhile, the track robot and waterjet robot in accordance with the pre-programmed program movement, and equipment equipped with monitoring system can monitor the operation of each sub-module system and read the running data and fault alarm in real time, and the formation of closed-loop control system feedback control each sub-module system. When the 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 adjusted between 16 ns and 20 ns, pulse width instability within -1 ns~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 thickness 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.

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  • 图 1  激光冲击强化设备组成示意图.

    Figure 1.  Diagram of laser shock peening equipment.

    图 2  激光器组成示意图.

    Figure 2.  Diagram of laser composition.

    图 3  光束传导图.

    Figure 3.  Diagram of beam transmission.

    图 4  方形光斑整形示意图.

    Figure 4.  Diagram of square spot shaping.

    图 5  方形光斑光强分布.

    Figure 5.  Intensity distribution of the square spot.

    图 6  控制系统.

    Figure 6.  Control system.

    图 7  激光冲击强化设备实物图.

    Figure 7.  Photo of laser shock peening system.

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出版历程
收稿日期:  2017-04-04
修回日期:  2017-06-20
刊出日期:  2017-07-15

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