砖块打包机摩擦焊接臂的振动特性分析

Analysis of Vibration Characteristics of Friction Welding Arm in Brick Packaging Machine

中文关键词: 摩擦焊接  振动  温度场  频率  转速

英文关键词: friction welding  vibration  temperature field  frequency  speed

中文摘要:

      目的 减小共振疲劳对摩擦焊接机构的影响，提高砖块打包机的可靠性、性能及使用寿命。方法 建立摩擦焊接机构模型，分析不同振动频率下的摩擦振动臂位移振幅与应力振幅。以理想焊接温度为基础，焊接时间为参数，确定振动频率与马达转速。结果 在所测试的频率范围内，随着振动频率不断增加，Z方向位移振幅较大于X、Y方向，Y方向应力振幅较大于X、Z方向，3个方向位移振幅与应力振幅均呈上升趋势。振动频率为440 Hz时，焊接时间至少需要2.0 s;振动频率为450 Hz和460 Hz时，焊接时间至少需要1.9 s。摩擦振动臂底端温度分布基本一致且均达到理想焊接温度，最终选取振动频率为450 Hz，马达转速设定为27 000 r/min。结论 最终确定的转速不仅需要满足共振疲劳影响最小化，还需结合砖块打包机实际焊接温度及效率因素，以此提高砖块打包机的可靠性与使用寿命。

英文摘要:

      The work aims to reduce the impact of resonance fatigue on friction welding mechanisms and improve the reliability, performance, and service life of brick packaging machine. A friction welding mechanism model was established to analyze the displacement amplitude and stress amplitude of the friction vibration arm under different vibration frequencies. Based on the ideal welding temperature and welding time as parameters, the vibration frequency and motor speed were determined. Within the tested frequency range, as the vibration frequency increased, the displacement amplitude in the Z direction was greater than that in the X and Y directions, and the stress amplitude in the Y direction was greater than that in the X and Z directions. The displacement amplitude and stress amplitude in all three directions showed an upward trend. When the vibration frequency was 440 Hz, the welding time was at least 2.0 s, and when the vibration frequencies were 450 Hz and 460 Hz, the welding time was at least 1.9 s. The temperature distribution at the bottom of the friction vibration arm was basically consistent and reached the ideal welding temperature. Finally, the vibration frequency was selected as 450 Hz, and the motor speed was set to 27 000 r/min. The final determined speed not only needs to minimize the impact of resonance fatigue, but also needs to be combined with the actual welding temperature and efficiency factors of the brick packaging machine, in order to improve the reliability and service life of the brick packaging machine.