为把5～8毫米的钢筋调直,目前均采用冷拉的办法。有的单位因为没有卡具,便把钢筋在电线杆上绕一圈,打一个结,钢筋拉直后用剪刀剪断,这样做浪费很大。如果用废旧钢筋剪刀头改装成一个紧线卡钳做为卡具还是比较简便的。制作方法如下:1.用一块厚14～15毫米铁板制成图1的形状。2.用砂轮切割机割去剪刀头的尖角,然后用砂轮磨成圆角。它的内壁 In order to straighten 5-8 mm steel bars, cold drawing methods are currently used. In some units, because there were no fixtures, the steel rods were wound around the poles to make a knot. After the reinforcements were straightened, they were cut with scissors, which was a waste. If using a scrap steel rebar head to be converted into a tight caliper as a fixture is relatively simple. The manufacturing method is as follows: 1. The shape of Figure 1 is made from a 14-15 mm thick iron plate. 2. Cut the sharp corner of the scissor head with a grinding wheel cutter and grind it with a grinding wheel. Its inner wall