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圈绕角钢通常在成形后再截取、焊接。这样做不仅费工费料,也不利于批量生产。下面介绍一种圈绕等边角钢的近似计算公式,可以实现先下料后成形,保持焊缝平行,便于焊接。现以圈绕外圆周为例,推导其公式。先作以下5个假设: 1.角钢材质均匀,各向同性,且认为由理想弹塑性材料组成。 2.角钢几何宽度B相对于欲要圈绕的直径D较小。 3.角钢由平直和常温初始状态,在纯弯矩载荷作
Circle around the angle of the steel is usually formed after the interception, welding. This is not only a waste of effort, but also not conducive to mass production. The following describes a similar formula around the equilateral angle of the circle, you can achieve the first after forming the shape, keep the weld parallel, easy to weld. Now around the outer circumference as an example, derive its formula. First make the following five assumptions: 1. Angle steel material isotropic, isotropic, and that the ideal elastic plastic material. 2. Angular geometric width B relative to the diameter of the circle to be smaller D. 3. Angle steel from the initial state of straight and normal temperature, load in the pure bending moment