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通常,我们使用的材料试验机仅配备几只常用的冷弯压头,在此我们介绍一种金属冷弯弯心压头的简易制作方法:当我们做冷弯试验需要不同规格的压头时,可在原有较小尺寸的压头外面用冷弯180°的方法包上一层钢板,使经过冷弯的钢板两外侧面距离正好等于所需的冷弯弯心,最后将两者一起作为所需的冷弯压头,若原有的弯心压头尺寸过小,而找不到冷弯性能及厚度都较适宜的钢板时,也可用叠合2～3层钢板的办法来代替,以便最终得到所需的弯心压头。现举例说明,如有一块厚度a=10mm的钢板欲做冷弯试验,要求弯心d=3a=30mm,原有的弯心压头d=20mm,我们只需切取一块5mm厚冷弯性能较
In general, we use a material testing machine equipped with only a few commonly used cold bending head, here we introduce a simple method of making a metal cold bending bending head: when we do cold bending test requires different specifications of the pressure head , In the original small size of the outside of the head with a 180 ° cold bending method of a layer of steel plate, so that the two sides of the cold-rolled steel plate by the distance just equal to the desired bending of the cold bend, and finally the two together as The required cold bending indenter, if the original curved hearthead size is too small, and can not find the cold bending performance and thickness are more suitable steel, but also laminated 2 to 3 layers of steel instead, in order to Finally get the required bending pressure head. For example, if a plate thickness of a = 10mm cold bending test to be done, the required bending d = 3a = 30mm, the original bending pressure head d = 20mm, we only need to cut a 5mm thick cold bending performance than