STL Straightener 1This is a special designed straightener for plane materials that need high precision punching treatment. As we all know, coil material can not produce good products without flattening and stress relieving treatments; Therefore, the performance of the straightener is critical in the production process 2. Since the curvature of each point is different, it the difficult to reach high precision straightening requirement by only rectifying roll laying. STL adopts rough straightening for the wide rows, precise straightening for narrow rows and the diverse laying straightening principle. The rough straightening brings the material the bend arcs, then use the precise straightening to meet the customer punching requirement 3. The flattening and the straightening secondary wheels adopt the imported SUJ2, milling after HRC60 heat treatment and starts production after plating the hard chrome to ensure evenness of the chrome layers and the form tolerances of each bearing.
