接铁压形模开裂原因分析及设计改进

CAUSE OF DIE CRACKS AND ITS DESIGN IMPROVEMENTS ON PRESSING CONNECTING IRON

以接铁压形模为例,说明了在高密度异形件的设计中,强度计算的重要性。通过接铁模具的强度计算,找到了模具开裂的真正原因是强度不足,改进设计的正确途径是材料选择,应选用强度较高的钢,用合金钢(调质40Cr或轴承钢GCr15)做模套比用碳钢(45号钢)优越。

By taking a die for forming connecting iron as an example, the importance to the strength calculation of die design for high density and irregular shape parts has been outlined.The real reason of die cracks is that the strength is insufficient The correct way for design improvement is to choose proper materials. The steel with higher strength should be used.Alloying steel (modified 40Cr or bearing steel GCr15) is better than carbon steel (45~#steel) for making die sleeves.