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裁切不锈钢冲孔板要注意

作者:【admin】 来源:【原创】 发表时间:【2016-04-22 16:33:36】 浏览:【次】

    不锈钢冲孔板出现间隙不一定是质量问题,专业人员给您详解一下: 不锈钢冲孔板间隙的出现其实是由剪切的剪切压应力控制,剪切产生两个力,一个是剪切拉应力,一个是剪切压应力。不锈钢冲孔网在剪切压应力下当不容易产生裂纹时冲孔板间隙就会变小。反之,在剪切拉应力下当拉应力下的剪切就会变大。

那么如何剪切出良好的冲孔板外形呢?

      间隙对尺寸精度的影响,在间隙很小的区域,光亮带宽,而且在板面方向的力丁为压力,放尺寸偏差为正;当间隙(c/f)增至州以上时,光亮带减小,尺寸偏差为负;若间隙达30%以上,由于丁的拉伸值也增加,放尺寸也有较大的负差。还比较万三种材料的情况,回弹冲孔筛板材料愈大,其尺寸变化愈大。

      剪切冲孔网是为了得到所需要的外型尺寸,一般认为,只要把凹模孔的尺寸加工成与制件尺寸同样大小即可,特产生百分之几毫米的误差。其原因是由于冲栽后的回弹所致。冲裁时,制件尺寸是它的最大尺寸,是位于光亮带和药裂带交界处的尺寸。由于回弹引起板料的回转,所以,假如该边界是在材料的小面以上,则尺寸增大,在中面以下则尺寸减小。

 


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