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A new model,called object model,for the simulation of cold roll-forming of tubes is presented.The model inherits the advantages of old models and is the embodiment of forming process that the strip is rolled step by step from feed rollers to last rolling pass.The elastic-plastic large deformation spline finite strip method based on updated Lagrangian method has been developed by improving the stiffness and transition matrix.Combined theory formulas and new analytical model,the forming process of a tube has been simulated successfully as an example.The analytical results are submitted and indicate that the proposed simulation method and new model are applicable.
A new model, called object model, for the simulation of cold roll-forming of tubes is presented. The model inherits the advantages of old models and is the embodiment of forming process that the strip is rolled step by step from the feed rollers to last rolling pass. The elastic-plastic large deformation spline finite strip method based on updated Lagrangian method has been developed by improving the stiffness and transition matrix. Combined theory formulas and new analytical model, the forming process of a tube has been simulated successfully as an example. The analytical results are submitted and indicate that the proposed simulation method and new model are applicable.