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1.减小凹模刃口高度h值在冲裁模中,有各种不同类型的刃口形状,但常用的形状如图所示。这种模具通常取α=2°～3°,刃口高度h值为几毫米。苏联研究设计和目前采用的同样刃口形状的模具,其寿命就有显著的提高。其主要特点是:刃口高度h=0.1mm,当被冲压材料厚度在1.5mm以下时,α=0.5°;当材料厚度超过1.5mm时,则α=0.75°,且冲头进入凹模的深度不超过0.1～0.2mm。此外模具的间隙为常用值的1/2。据说按
1. Reduce the die edge height h value In the blanking die, there are different types of edge shape, but the commonly used shape as shown. This mold is usually taken α = 2 ° ~ 3 °, the blade height h value of a few millimeters. Soviet Union research and design and the current use of the same edge shape of the mold, the life expectancy has significantly improved. Its main features are: the edge height h = 0.1mm, when the thickness of the material being pressed 1.5mm below, α = 0.5 °; when the material thickness exceeds 1.5mm, then α = 0.75 °, and the punch into the die Depth of not more than 0.1 ~ 0.2mm. In addition the gap between molds for the common value of 1 / It is said to press