按规范规定,在钢筋的弯折处,Ⅰ级、Ⅱ级、Ⅲ级钢筋的弯曲直径分别为2.5 d、4 d、5 d;对于弯起钢筋的中间部位弯折,弯曲直径不应小于5 d。为适应规范要求,我们将弯曲机上的心轴直径加大至100 mm、150 mm,将挡板做成分离式,见图1(a)(d)。分离式挡板上后挡板的长短是可调的,楔铁紧一点,挡距变 According to the regulation, the bending diameters of Grade Ⅰ, Grade Ⅱ and Grade Ⅲ steel bars are 2.5 d, 4 d and 5 d respectively at the bending place of the steel bars; the bending diameter of the middle part of the steel bars should not be less than 5 d. In order to meet the specifications, we increased the diameter of the mandrel on the bending machine to 100 mm and 150 mm, and made the baffles separate. See Figure 1 (a) (d). The length of the rear baffle on the separate baffle is adjustable, the wedge iron is tight, and the pitch varies