前 言 1982年初,我厂接受制造某钢铁公司铸型场冷却台搁栅(照片)的任务。该构件是新日本制铁株式会社设计的,其结构待点是,尺寸大、焊缝多、外形精度要求较高。常规的制造方法是焊后用大型水压机进行整体矫形。经过试验,我们采用火焰切割下 弯料预制反变形,适当地控制焊口间隙 Foreword In early 1982, our factory accepted the task of manufacturing a joist (photo) for the cooling station of a steel company’s foundry. The structure is a new Nippon Steel Corporation design, the structure of the point is that the size, weld more shape accuracy requirements. The conventional method of manufacture is to use a large hydraulic press after welding for the overall orthopedic. After the test, we use flame cutting precast anti-deformation under the material, the appropriate control of weld gap