卷板预弯工艺的对中操作介绍精品.pdf

卷板预弯工艺的对中操作介绍 Three bending process 1 卷板由预弯（压头） 、对中和卷弯三个过程组成。 1 roll plate by bending (head), and roll bending of three process. 2 预弯（压头）在三棍卷板机或预弯压力机上进行。当预弯 板厚不超过 20mm 的情况下， 可采用预弯也一块钢板作为弯 模，其厚度不应大于板厚的两倍，长度应比板略长，将弯曲 模放入辊筒中，将板料置于弯模上，压下上辊并使弯模来回 滚动使板料边缘达到所要求的弯曲半径。同时采用弯模预弯 时，必须控制弯曲功率不超过设备能力 60% ，操作时应严格 控制上辊的压下量，以防过载损坏设备。在压力机上用模具 预弯适用于各种板厚，用长度比板料短的通用模具，预弯时 必须分段进行，预弯两端，预弯尺寸根据工件卷圆卷板机种 类而定。如 20*2000 卷板机端面预弯尺寸是 250-300 ；8*2000 卷板机端面预弯尺寸是 150-200 。 2 bending (pressure head) in three stick machine or bending machine. When bending thickness under the condition of less than 20 mm, bending can be used also as a steel plate bending die, its thickness should not be greater than twice the thickness, length should be slightly longer than the board, the bending die is put into the roller, puts sheet metal bending mold, pressure roller and the bending modulus back and forth rolling sheet edge to achieve the required bending radius. Using curved bending mould at the same time, must control bending power equipment capacity by 60%, not more than operation should strictly control the roll reduction, in case of overload damage the equipment. In presses with bending mould is suitable for various thickness, with a general mold length shorter than sheet metal, and must be segments when bending, bending, bending the size according to the type of workpiece, roll round machine. Such as 20 * 2000 rolls end bending size is 250-300; 8 * 2000 bending roll end bending size is 150-200. 3 对中，将预弯的板料置于卷板机上滚弯时，为防止产生扭 曲将板料对中，要使板料的纵向中心线与辊筒轴线保持平 行。对中方法有几种： 3 on, bending sheet metal in roll on roll bending machine, in order to prevent