但是，辊轴的刚性是和其截面模量相关的。它受设备结构及其它因素的限制。我

However, the rigidity of the roller shaft is related to its section modulus. It is limited by equipment structure and other factors. It is impossible for us to make the roller extremely thick. <br>In this case, the bending machine manufacturer should consider the design of each roller to be slightly curved according to the length of the bending machine, the performance of the coil material, and the thickness of the plate. But this only applies to a certain range of sheet thickness. <br>The purpose of the arc correction: <br>In the process of bending, when the upper and lower rollers are subjected to flexural deformation, the part holding the plate is basically straightened. That is, it is ensured that the gap between the upper and lower rollers holding the plate is consistent, so that the plate is uniformly stressed at all points along the length of the roller shaft. <br>The size of the arc should be carefully calculated by experienced professional and technical personnel according to the material and applicable sheet thickness range and other parameters.

However, the rigidity of the roller is related to its cross-sectional modulus. It is limited by the structure of the equipment and other factors. We can't make rollers particularly thick.<br>In this case, the roller manufacturer should consider the design of each roller shaft into a slightly curved arc, that is, the roller shaft arc correction according to the length of the roll plate machine and the performance of the roll plate material, plate thickness and other parameters. However, this applies only to a certain sheet thickness range.<br>Arc correction purposes:<br>In the process of rolling plate, when the upper and lower roller forces appear to be flexdeformation deformation, so that the part of its clamping plate is basically straight. That is, to ensure that the gap between the upper and lower rollers of the clamping plate is consistent, so that the plate along the roll length direction of each point of the force uniform.<br>The size of the arc size should be based on the material and the applicable plate thickness range and other parameters, by experienced professional and technical personnel to carry out careful calculation.

However, the rigidity of roller shaft is related to its section modulus. It is limited by equipment structure and other factors. It is impossible for us to make the roller shaft very thick.<br>In this case, the rolling machine manufacturer should consider to design each roller as slightly curved according to the length of the rolling machine, the performance of the rolling material and the thickness of the plate, that is, to correct the roller shaft by arc. However, this only applies to a certain range of sheet thickness.<br>Purpose of arc correction:<br>In the process of plate rolling, when the upper and lower rollers are subjected to bending deformation, the part of the plate clamped by them tends to be straight. That is to ensure that the gap between the upper and lower rollers of the clamping plate is consistent, so that the stress on each point of the plate along the length direction of the roller shaft is uniform.<br>The size of arc size shall be calculated carefully by experienced professional technicians according to the material and applicable plate thickness range.