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本文归纳了高分子薄膜的润滑特点,分别从成形时高分子薄膜与高强钢的接触特点、高分子薄膜润滑剂的接触状态和润滑特征、薄膜在板料拉深成形中的形态变化3方面分析了聚四氟乙烯高分子薄膜的润滑机理,通过摩擦磨损实验研究了薄膜的承载能力。结果表明:润滑过程中,在高分子薄膜发生粘着磨损的区域出现撕裂,在无粘着磨损区域,薄膜随坯料的变形而变形,始终覆盖在其表面;高分子薄膜作拉深润滑剂时,会形成大量的磨屑,磨屑会粘附在坯料上随着工艺进行起润滑作用;随着薄膜厚度增加,摩擦系数增加,薄膜承载能力增加,但薄膜太厚或太薄,都会导致摩擦力增大,影响零件成形质量。
This article summarizes the lubricating characteristics of polymer films. From the contact characteristics of polymer films with high strength steel during forming, the contact state and lubrication characteristics of polymer film lubricants, and the morphological changes of the films in sheet metal forming The polytetrafluoroethylene polymer film lubrication mechanism, through the friction and wear experiments to study the bearing capacity of the film. The results show that during the lubricating process, the polymer film appears tear in the area of adhesive wear. In the non-adhesive wear area, the film deforms with the deformation of the material and always covers the surface. When the polymer film is used as the drawing lubricant, Will form a large amount of debris, wear debris will be adhered to the blank as the process of lubrication; as the film thickness increases, the friction coefficient increases, the film carrying capacity increases, but the film is too thick or too thin, will lead to friction Increase, affecting the quality of parts forming.