大型平板圆法兰在工业锅炉烟囱的制造中大量应用。少量生产时往往用气割在钢板上把法兰分成三段或四段圆弧切割下来,再用气焊拼焊而成。这不仅材料浪费大,且质量也很难保证。对于工业锅炉烟囱制造时,需用的大量圆法兰制造,急需一种加热压延大型平板圆法兰专用设备。为此,我们自己动手制作了图1所示的专用设备。平板圆法兰坯料是带钢料。其宽厚同被压延的圆法兰相当,长度相当于圆法兰中径展开长度。坯料一端弯成90°装夹头。压延圆法兰的胎具内径比被压延圆法兰内径d Large flat circular flange in the manufacture of industrial boilers in a large number of applications. A small amount of production is often used gas cutting the flange on the plate is divided into three sections or four sections of the arc cut, and then welding welded together. This is not only a waste of materials, and the quality is difficult to guarantee. For industrial boiler chimney manufacturing, the need to use a large number of round flange manufacturing, an urgent need for a large-scale flat-rolled flange heating flange special equipment. To do this, we made our own dedicated device shown in Figure 1. Flat flange round billet is strip material. Its width is equal to the circular flange being calendered, and the length corresponds to the extended length of the circular flange. One end of the blank is bent into a 90 ° chuck. Calender round flange diameter than the inner diameter of the round flange is d