钢板覆膜过程的温度场计算

Temperature field calculation for plate laminating process

钢板覆膜过程中钢板温度的控制对于产品质量至关重要,分别采用三维有限元法和二维有限元法对覆膜过程的温度场进行了计算。结果表明,采用三维有限元方法比二维有限元法计算效率低很多。先选取较长时间步长对整个过程进行计算,再对特定区域采用较短步长进行计算。通过实例验证了这种方法效率比较高,且该方法对于精确解析覆膜过程热量传递是非常适用的。从分析结果看,辊缝间断面的温度场变化非常快。该计算方法和结果对于覆膜机设计很有意义。

The plate temperature control is essential for the product quality in the laminating process. The heat transfer is carried out with two ways,one is 3D finite element method and another is 2D finite element method. The result indicates that the computational efficiency of 3D finite element is much lower than 2D finite element in this problem. The calculation is carried out with two time steps,one is longer time step for the whole process and another is shorter time step for a typical area. It is verified that the method is both efficient and applicable to analysis the heat transfer accurately in this process. It is found from the result of this calculation that the cross-sectional temperature distribution in roll nip changes greatly within extremely short time. The method and the result are very useful for the design of the laminating machine.