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　　The role of cold rolling finishing process of presenting machine:

　　(1) The mechanical properties of cold-rolled strip are modified, and the quality of metal strip can be improved after leveling, especially the strip shape and surface quality and surface requirements.

　　(2) Finishing is to process strips into steel sheets, strips and coils of the size and weight required by users.

　　(3) The quality grading materials are packaged in bundles to make them become the steel sheet, strip and coil products in the delivery state that users ultimately need.

　　Flattening is an important process in cold rolling production. Its functions are as follows:

　　(1) Eliminate the yield platform of annealed strip and modulate the mechanical properties of strip. A kind of

　　(2) Improve straightness of strip.

　　(3) According to the user's needs, the strip surface has a certain degree of roughness.

　　In addition, the double stand temper mill can achieve a larger reduction rate of cold rolling and produce tin plated sheets with ultra-thin thickness. After recrystallization annealing, the hardening structure of cold rolled strip is eliminated, but the mechanical properties and processing properties are deteriorated.