四辊卷板机：

结构特点：
       该机结构形式四辊式，上辊为主传动，通过减速机的输出齿轮与上齿轮啮合，为卷制板材提供扭矩；下辊作垂直升降运动，通过液压缸内的液压油作用于活塞而获得，以便夹紧板材，为液压传动；在下辊的两侧设有侧辊并沿着机架导轨作倾运动，通过丝杆螺母蜗轮蜗杆传动；该机优点是板材端部预弯及卷园可以在同一设备上进行。

StructuraI characteristics
      The machine adopts the four-roller structure with the upper roller as the main drive，providing the plates bending with torque through the engagement between the gear of the moderatorand the gear of the upper roller The Iower toiler makes vertil movements and imposes a force on the piston through the hydraulic oll in the hydraulic cylinder so as to clamp the plate tght side rollers are arranged onthe two sides of the Iides of the Iower roller，and make lnclining movement along the guide ralI，and provide drive through the screw，the nut，the worm and the Iead screw．The advantage of the machine is that the preliminary bending and rolling of the top ends of the plates can be conducted on the same machine