卷板機之所以能夠起到卷板的效果，首要仍是要來它的上下輥，并且上輥是在兩個下輥中間的對稱方位進行筆直升降運動的，當然這也要全賴液壓缸內的液壓油對活塞的效果。而兩下輥是靠主減速機的末級齒輪所帶動的，首要是作旋轉運動，從而為卷制板材供給扭矩。

卷板機上輥在兩下輥中心對稱方位經過液壓缸內的液壓油效果于活塞作筆直升降運動，經過主減速機的末級齒輪帶動兩下輥齒輪嚙協作旋轉運動，為卷制板材供給扭矩。

It’s the standard flat plastic metal plate after three working roller machine (two root rollers, a roller) between with rotary motion of the upper roller and the lower roller under pressure, the metal plate after several successive twists and turns, the plastic deformation of permanent, roll into demand the cylinder, cone or a part of them. The defects of the hydraulic three roller bending machine are that the end of the plate needs to be bent with other equipment. The plate bending machine is suitable for the large plate bending machine with a thickness of more than 50mm, and the lower part of the two lower roller adds a row of fixed idlers to shorten the span of the two lower rolls, so as to improve the accuracy of the rolled parts and the overall performance of the machine.

它的標準平坦的塑性金屬板經過卷板機的三根作業輥(二根下輥、一根上輥)之間，憑借上輥的下壓及下輥的旋轉運動，使金屬板經過多道次接連曲折，發生永久性的塑性變形，卷制成所需求的園筒、錐筒或它們的一部分。該液壓式三輥卷板機缺陷是板材端部需憑借其它設備進行預彎。卷板機適用于卷板厚度在50mm以上的大型卷板機，兩下輥下部增加了一排固定托輥，縮短兩下輥跨距，從而進步卷制工件精度及機器全體性能。

Rolling machine roll in two and symmetrical range after the hydraulic oil in the hydraulic cylinder piston effect for straight lifting movement, after the last stage gear of the main reducer driven two roller gear meshing cooperative rotary motion for coiled sheet supply torque.