摘要
The temperature change of the die surface in practical aluminum alloy die casting process was analyzed,and a 2D model was formulated on the basis of a deep concave round cavity without sliding core to analyze thestress distributions along the die surface in detail. Equipment was designed to test the thermal state of the die steelin different thermal loading conditions. The results of stress analysis showed that, the value of thermal stress (maximum1.5 GPa) caused in the die filling and die spraying stages was larger than the mechanical stress (maximum 85 MPa)caused in the die locking stage. The results of the thermal check experiment showed that there were three stages ofdie dissolving, and that the stress distribution shown by the samples' cracking routine was close to the die surfacestress analysis.
The temperature change of the die surface in practical aluminum alloy die casting process was analyzed, and a 2D model was formulated on the basis of a deep concave round cavity without sliding core to analyze the stress distributions along the die surface in detail. Equipment was designed to test the thermal state of the die steel in different thermal loading conditions. The results of stress analysis showed that, the value of thermal stress （maximum 1.5 GPa） caused in the die filling and die spraying stages was larger than the mechanical stress （maximum 85 MPa） caused in the die locking stage. The results of the thermal check experiment showed that there were three stages of die dissolving, and that the stress distribution shown by the samples＇ cracking routine was close to the die surface stress analysis.
基金
Shandong Postdoctoral Innovation Special Fund (No. 200703073)
关键词
拉模铸造
模具
温度变化
压力分布
die temperature
die stress
die filling
die locking
die spraying
die casting
