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成形极限图是用来评定深冲簿板成形性能的一种重要图形。它能直观、清楚地表明薄板在冲压过程中的变形情况。本文对成形极限图的意义和测定方法进行了比较详细的说明,给出了几种材料的成形极限图。零件的实际冲压结果表明,所冲零作变形接近或超过成形极限曲线就可冲裂,而变形范围在成形极限曲线下方的零件,无论冲几次都不会出现废品。因而以成形图作为组织生产、比较最佳工艺以及冲压设计及选材的依据是个可行的途径。
Forming limit chart is used to assess the forming properties of deep drawing board an important figure. It visually and clearly indicates the deformation of the sheet during stamping. In this paper, the significance and determination of the forming limit map were described in more detail, given the forming limit of several materials. The actual stamping results of the part indicate that the zeroing deformation of the punch can burst near or beyond the forming limit curve and that the part of the deformation range below the forming limit curve will not be rejected no matter how many times it is punched. Therefore, as the organizational chart for the production, the best technology and stamping design and selection of the basis is a viable approach.