1982年我们接受了试轧周期花边π型钢的任务。这种型钢工艺复杂,轧制难度大,因为很难在水平辊轧机上轧制对称的π型钢两翼花边,达不到花边对角线公差的技术要求,因此这种钢材在国内并没有成为正式产品。 我们接受试轧任务后,针对实际问题及几次试轧的经验,在有关单位的协助下,研制了一台专用π型钢万能轧机,简称“πW轧机”。这台轧机的主要作用是,用一对同步转速的周期齿形立辊和上、下水平导辊加工周期花边,并根据下列两种情况增设了相位调整机构。 1.由于机加工及装配中的积累误差,使两个齿形辊在πW轧机上的初始位置不对称,需要相位 In 1982 we accepted the task of testing and rolling periodic lap π steel. This type of steel complex process, the rolling is difficult, because it is difficult to roll symmetrical π-beam on both sides of the horizontal roller mill lace, lace diagonal tolerance technical requirements, so this kind of steel in the country did not become formal product. After we accepted the task of trial rolling, in response to the actual problems and the experience of several trials and trials, we developed a dedicated π-shaped steel universal mill, referred to as “πW mill” with the help of the relevant units. The main function of this rolling mill is to process the periodic lace with a pair of synchronous tooth profile vertical rollers and upper and lower horizontal guide rollers, and the phase adjustment mechanism is added according to the following two cases. 1. Because of the accumulated errors in machining and assembly, the initial position of the two toothed rollers on the πW mill is not symmetrical and requires a phase