卷板工艺卷板工艺过程，我们大致分为一下几个步骤。预弯卷板中，平板两端各

Coiling process The <br>rolling process is roughly divided into the following steps. <br>In the pre-bent <br>coil, each end of the plate has a length. Because it cannot touch the upper roller, it does not bend. We call it the remaining straight edge. <br>Symmetrical bending: The <br>remaining straight edge is about half of the center distance of the lower roller. At the same time, this is also related to plate thickness. <br>Asymmetrical bending: The <br>remaining straight sides are approximately one-sixth to one-tenth of symmetrical bending. <br>This part of the remaining straight edges is difficult to completely eliminate when rounding. This is easy to cause quality and equipment accidents, <br>so we need to pre-bend the sheet. <br>If there is no pre-bending, the mold can be used for correction after the final rolling.

Roll plate process.<br>The roll plate process, we roughly divided into a few steps.<br>Pre-bend.<br>In the roll plate, there is a length at each end of the plate. Bending occurs because it does not touch the upper roller. We call it the remaining straight edge.<br>Symmetry bending:<br>The remaining straight edges are approximately half the center distance of the lower roller. At the same time, this is also related to the thickness of the board.<br>Asymmetric bending:<br>The remaining straight edges are about one-sixth to one-tenth of the symmetrical lysy bends.<br>The remaining straight edges of this part are difficult to completely eliminate during rounding. This can easily lead to quality and equipment accidents,<br>Therefore, we need to pre-bend the plate.<br>If there is no pre-bending, the final roll can be corrected with the mold.

Rolling process<br>The rolling process is roughly divided into the following steps.<br>Prebending<br>In the rolling plate, there is a length at both ends of the plate. It does not bend because it does not touch the upper roll. We call it residual straight edge.<br>Symmetrical bending:<br>The remaining straight edge is about half of the center distance of the lower roller. At the same time, this is also related to plate thickness.<br>Asymmetric bending:<br>The remaining straight edge is about one sixth to one tenth of the symmetrical bending.<br>It is difficult to eliminate the remaining straight edges completely when straightening. This can easily lead to quality and equipment accidents<br>Therefore, we need to pre bend the sheet metal.<br>If there is no pre bending, the die can be used to correct after the final rolling.<br>