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塑钢门窗近几年在国内方兴未艾，传统塑钢门窗都是推拉窗，但推拉窗气密性和开启方式等方面存在一系列不便和缺陷，而随着人们生活水平的提高，平开翻转窗开始进入市场。平开翻转窗和推拉窗的结构区别在于五金件上，目前国内平开翻转窗五金件主要从国外进口。北新建材(集团)有限公司2001年在国家经贸委的支持下上马全国第一条全自动门窗五金冲压线，对于生产出来的五金件质量的寿命检测是一个新的问题。
　　五金件质量的寿命检测目前国内没有标准，我们参考欧洲的标准主要有以下几方面要求：
　　1：开启寿命：要求不低于50000次，动作要求模拟人工开启门窗，即先平开，执手在第一开关位置时(如图1中位置)，为起始位置。逆时针转动90。　到平开位置，水平向外平开，窗扇开启大约35。(以平开转轴位置为轴心)，然后关闭窗扇，将执手顺时针旋转90。　到关闭位置;平开动作结束，执手回到第一开关位置时，再将执手逆时针转动180。　到上悬位置，向外、向下拉平开上悬，窗扇开启大约15。(以平开下转轴位置为轴心)，然后关闭窗扇，将执手顺时针旋转180。　到关闭位置;此平开与上悬为一个动作周期，为一次平开上悬开启。
　　2：开启频率：检测频率为5次/分
　　3：开关门窗力不大于100N，开启执手力矩不大于1N.m;
　　据笔者在国内和欧洲五大五金件生产厂参观的结果看，主要是用气缸来实现以上动作，虽然基本可以实现动作，但如果窗型复杂，这种设备适用的灵活性和方便性极差，我们考虑用伺服电机和滚珠丝杠来实现以上动作并克服其弊端，设备已调试完毕，运行效果良好。
我们用两台伺服电机，这里我们选用了三菱公司的MR-J2S-A型伺服电机，一台用于开执手，一台用于开窗扇，用三菱公司的FX2N型PLC控制整个系统的协调工作，系统的状态由触摸屏来显示和调整，如工作频率和次数的设定，实际工作次数、系统故障原因及拉力和扭力的显示。拉执手的长杆在执手
　　接头处有一类似于机器手的万向接，便于换向。
　　现将系统的工作流程描述于下：
　　1) 在触摸屏上设定工作频率和次数和窗型大小。
　　2) 在操作台上选定是要进行平开检测还是要进行平开上悬开检测(以下以平开上悬为例描述)，启动任务，系统开始运行。
　　3) 首先1号伺服将执手逆时针旋转90o到平开位置，即将执手置于水平位置。
　　4) 2号伺服沿丝杠方向将窗扇通过执手往外平开，窗扇开启大约35。(以平开转轴位置为轴心，即1图中的2处)。
　　5) 2号伺服沿丝杠方向将窗扇通过执手往里关上。
　　6) 1号伺服将执手顺时针旋转90o到关闭位置，即起点位置。以上完成一次平开检测。
　　7) 1号伺服将执手逆时针旋转180o到上悬位置，即和窗扇平行位置。
　　8) 2号伺服沿丝杠方向将窗扇通过执手往外平开，窗扇开启大约15。(以平开下转轴位置为轴心，即1图中的1处)。
　　9) 2号伺服沿丝杠方向将窗扇通过执手往里关上。
　　10) 1号伺服将执手顺时针旋转180o到关闭位置，即起点位置。以上完成一次平开上悬检测。
　　以上是实验机的工作流程，由于窗型大小不一，窗扇开启35o时，2号伺服
　　沿丝杠方向行走距离不一样，所以每次实验开始必须要在触摸屏上选定窗型大小，另外有外平开和平开上悬窗户的区别，它们的工作流程也不一样，所以要在工作前选好，否则会损坏五金件。

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