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Vibration reduction of pneumatic percussive rivet tools: Mechanical and ergonomic re-design approaches

机译：减少气动敲击铆钉工具的振动：机械和人体工程学的重新设计方法

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This paper presents a systematic design approach, which is the result of years of research effort, to ergonomic re-design of rivet tools, i.e. rivet hammers and bucking bars. The investigation was carried out using both ergonomic approach and mechanical analysis of the rivet tools dynamic behavior. The optimal mechanical design parameters of the re-designed rivet tools were determined by Taguchi method. Two ergonomically re-designed rivet tools with vibration damping/isolation mechanisms were tested against two conventional rivet tools in both laboratory and field tests. Vibration characteristics of both types of tools were measured by laboratory tests using a custom-made test fixture. The subjective field evaluations of the tools were performed by six experienced riveters at an aircraft repair shop. Results indicate that the isolation spring and polymer damper are very effective in reducing the overall level of vibration under both unweighted and weighted acceleration conditions. The mass of the dolly head and the housing played a significant role in the vibration absorption of the bucking bars. Another important result was that the duct iron has better vibration reducing capability compared to steel and aluminum for bucking bars. Mathematical simulation results were also consistent with the experimental results. Overall conclusion obtained from the study was that by applying the design principles of ergonomics and by adding vibration damping/isolation mechanisms to the rivet tools, the vibration level can significantly be reduced and the tools become safer and user friendly. The details of the experience learned, design modifications, test methods, mathematical models and the results are included in the paper.
机译：本文提出了一种系统的设计方法，这是多年研究工作的结果，用于对人体工学进行铆钉工具（即铆钉锤和抗弯杆）的重新设计。使用人体工程学方法和铆钉工具动态行为的力学分析进行了调查。通过田口方法确定了重新设计的铆钉工具的最佳机械设计参数。在实验室和现场测试中，对两种符合人体工程学的重新设计的带有减振/隔离机制的铆钉工具与两种传统的铆钉工具进行了测试。两种类型工具的振动特性均通过实验室测试使用定制的测试夹具进行测量。对工具的主观现场评估是由飞机维修店的六名经验丰富的铆钉机进行的。结果表明，隔离弹簧和聚合物减振器在降低未加重和加重加速条件下的整体振动水平方面非常有效。台车头和外壳的质量在减振杆的振动吸收中起着重要作用。另一个重要结果是，风管铸铁与钢和铝相比，具有更好的减振能力，以抗压钢筋。数学模拟结果也与实验结果一致。从研究中得出的总体结论是，通过应用人体工程学的设计原理以及在铆钉工具上增加减振/隔离机制，可以显着降低振动水平，并且工具变得更加安全和用户友好。本文中包括了所学经验，设计修改，测试方法，数学模型和结果的详细信息。

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