摘要
利用Pro/ENGINEER软件对注塑机合模装置的动态性能和疲劳问题进行了分析,结果表明:模态振型影响前模板、动模板、后模板和拉杆的偏移,合模装置动态频域响应分布规律基本相同,低频能量较小且集中在94.4 Hz附近,中频能量较大且集中在369.5 Hz附近,系统阻尼的增加可以改善合模装置的动态性能,动态载荷增加使得弹性振动频率能量增大.动模板最小疲劳寿命发生在安装顶出机构的十字槽中心底部,并随着设计寿命和作用载荷的增加安全系数值降低,容易产生疲劳破坏.
An analysis was made of the dynamic response and fatigue of the clamping devices of the injection molding machine using the Pro/ENGINEER software and the results showed that mode vibration affects the deviation of the front plate, moving plate, back plate and tension bar. The dynamic frequency response distribution of the clamping devices is similar. The low frequency energy is smaller and is concentrated in the neighborhood of 94.4 Hz. The middle frequency energy is larger and is concentrated in the neighborhood of 369.5 Hz. System damping increase improves the dynamic property of the clamping devices. Dynamic load increase makes elastic vibration frequency energy larger. The smallest fatigue life of the moving plate takes place in the cross slot center bottom of the ejection mechanism. The safety factor decreases with the increase of designed life and exertion load and can result in fatigue destruction of the moving plate.
出处
《五邑大学学报（自然科学版）》
CAS
2010年第1期1-7,共7页
Journal of Wuyi University(Natural Science Edition)
基金
广东省自然科学基金资助项目(9151063101000021)
广东省科技计划项目(2005B10201010)
关键词
注塑机
合模装置
动态响应
疲劳破坏
动模板
injection molding machine
clamping devices
dynamic response
fatigue destruction
moving plate
