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自紧版创工作原理简析

 日期:2019/4/30 13:35:40 人气:92 

自紧螺栓是在版和垫片的接触面上做文章,用特别的自紧王工艺制成螺旋面并博以特定的螺旋角制成。这样,就可以防止相对于母螺纹产生的任何螺纹的横向或者纵向移动。

标准螺纹啮合后,啮合各牙的受力极不均匀。第一牙受力最大,第二牙次之,最后一牙最小甚至是悬浮状态,头两牙受力之和一般是螺栓张力的70%甚至80%。这是一种很不稳定的受力状态,在据烈振动及温差大的情况下前一牙的应力可能超过屈服点而发生塑性变形,造成松动。这也就容易理解标准螺纹头几牙容易磨损及滑牙了。

自紧王由于配合面为螺旋斜面,使得旋合区各螺纹的受力极为均匀。自紧王抗震防松版螺栓不仅克服了造成普通标准螺纹松动的两个根本原因,即横向间隙及各牙受力极不均匀现象的存在,同时,在安装后反方向回旋版可额外放大预紧力,这是所有最新所不能的核心之处,也是自紧王产品的核心所在。

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