S形φ4钢筋系使用在预应力屋面板中,作为主肋的横向钢筋。依靠其上下两端的弯钩把预应力主筋和上部板网伸入主肋中的φ4纵向钢筋连系起来。以前,我车间加工这种钢筋,需要经过调直、切断、成型等多道工序。各工序虽然使用了机器,但效率不高,并且操作人员总得守在机旁从事繁琐的体力劳动。1974年底,我们经过反复试验,制成了S形钢筋连续成型机(图1),实现了自动喂料、弯曲成型和切断,提高工效3～4倍。S形钢筋连续成型机外形尺寸为:800 The S-shaped φ4 steel bar is used in the prestressed roof panel as the transverse reinforcement of the main rib. Depending on the hooks at the upper and lower ends, the prestressed main ribs and the upper webs are joined together by a φ4 longitudinal bar that extends into the main ribs. In the past, my shop had to process such steel bars and needed to go through several processes such as straightening, cutting and forming. Although the machines were used in various processes, the efficiency was not high, and the operators had to keep busy working on the machines. At the end of 1974, after repeated trials, we made a S-shaped continuous bar forming machine (Figure 1), which achieved automatic feeding, bending and cutting, and improved work efficiency by 3 to 4 times. S-shaped continuous steel forming machine dimensions: 800