我厂在制造各种型号的凹底平车时,经常要进行焊接翻转及吊装各种形状的对称长大钢板。原来采用大型钢架使钢板固定,通过天车翻转或吊装。操作既不方便,又不安全,而且易造成焊缝开裂。经过反复试验我们设计了如图1所示的滑轮翻转吊具,经过两年多应用,证明此翻转吊具结 I plant in the manufacture of various types of concave flat car, often have to be inverted flip and lifting of various shapes symmetrical growth of steel. The original use of large-scale steel plate to make the plate fixed by crane or hoisting. Operation is neither convenient nor safe, and can easily lead to weld cracking. After trial and error, we designed a pulley turning spreader as shown in Figure 1. After more than two years of application, we proved that the turning spreader