2016 occurred in a two shipyard users of Φ88.9mm × 3.05mm specification 304 steel pipe and Φ60mm × 3.5mm specification 316L pipe bend wrinkle wave problem is extremely typical.
In the manufacturing process of stainless steel elbow or manufacturing process of stainless steel bend, it will be accompanied by uneven wall thickness, wrinkle wave and rebound, roundness distortion and other problems, which are of considerable concern. Stainless steel pipe application process will inevitably involve the elbow or bend. Stainless steel pipe manufacturing standards allow to and do tolerance zone is often greater than the “thin” wall bend necessary for the mold gap, sometimes in small batches of multiple specifications of stainless steel bend wrinkles, but as long as the grasp of the “thin” wall degree, pay attention to the mandrel structure, mold gap and reasonable adjustment of the bending parameters, stainless steel cold bending pipe when the problem of wrinkled waves can be solved. According to the steel pipe to/do and Ro/do decision of the bend “thin” wall degree, the reasonable setting of mandrel type and other mold processing and installation accuracy to determine the “gap”, in order to mechanically enhance the “compression bar “Compressive stability, which is necessary to prevent wrinkles guarantee. The analysis points out that the essence of the wrinkle wave is the arch belly compression plastic deformation zone of the “compression bar” instability buckling phenomenon. In order to prevent the problem of wrinkles when cold bending stainless steel, first from the standardization of pipe fitting manufacturing perspective to examine and assess the advantages of cold bending methods and their reasonable range of applications, and then analyze the occurrence of wrinkles when cold bending stainless steel “thin” wall conditions, influencing factors, and through the analysis of two typical cases.
0 kommentar(er)
