大型锅炉的内表面,用气密性管子护板作水冷壁。采用这种管子护板,可提高动力装置的可靠性和效率,缩短其制造时间。为了解决工业上对气密性护板锅炉设备日益增长的需要,苏联乌拉尔重机厂设计了一条护板专用生产线。在这条专用生产线中,要求采用一台弯板机,可在不同方向进行任意次数的弯曲,弯曲角达150°,生产场地的费用要最低。这就需要在选定弯板方法和弯板机结构形 Large boiler inner surface, with airtight tube guard for water wall. The use of this tube guard increases the reliability and efficiency of the power plant and shortens the manufacturing time. In order to address the industry’s growing need for airtight guarded boiler equipment, the Ural Heavy Machinery Plant of the Ussr designed a dedicated line of guarded panels. In this dedicated production line, a bending machine is required to bend any number of times in different directions with a bending angle of up to 150 °, with the lowest cost of production. This requires the choice of bending method and bending plate structure