图1所示的圆筒工件所用材料为Q235A钢,而我厂没有现成的坯料,又没有可以进行整件加工的合适设备。由于急用,决定用加热、拉压法来弯曲,然后再焊接。 具体步骤是:先在一块大而平的钢板上,用面规划出欲弯曲工件的内圆直径560mm(因为内圆不需加工),然后沿着圆弧用数块(越密越好)20～25mm厚的钢板大致拼焊出一个φ560mm×135mm的圆筒来,作为所要求弯曲件的简易靠模。弯曲前,应将事前准备好 The material used for the cylindrical workpiece shown in Figure 1 is Q235A steel, and our factory has no ready-made blanks and no suitable equipment for the entire process. Due to urgency, decided to heat, tension and compression method to bend, and then welded. The specific steps are: first in a large and flat steel, with the planning of the workpiece to be bent inner diameter of 560mm (because the inner circle without processing), and then along the arc with a few blocks (the denser the better) 20 ~ 25mm thick steel roughly spell out a φ560mm × 135mm cylinder, as the required bending pieces of simple model. Before bending, should be prepared in advance