摘要
以医疗用17-4PH不锈钢导引衬套的射出成型加工过程为例,探讨了金属在射出成型过程中所产生的黑痕与熔接线现象;建立数学模组分析了射出成型阶段的射出速度、保压压力、料温、模温等工艺参数对黑痕与熔接线的影响。并运用反应曲面法(RSM)并结合连续近似最佳法(SAO)来获取17-4PH不锈钢最佳化生产品质之工艺参数。结果表明,保压压力对于黑痕面积的影响远大于射出速度对其影响,但射出速度的提高不利于减少黑痕面积;在低的模温和高的料温下,黑痕面积出现最小值;而在高的模温和料温下,熔接线的区域则最小。工艺参数优化后,其生坯表面所形成的黑痕与熔接线面积较初始值分别减少了78.81%和83.85%。
The 17-4PH stainless steel guide bushing used for medical was adopted to investigate the phenomenon of black area and welding lines in the metal injection molding, and the mathematical model was presented to analyze the influences of operating parameters such as injection velocity, holding pressure, material molten temperature and mold temperature on black area and welding lines. The response surface methodology （RSM） associated with the sequential approximation optimization （SAO） method would be used to obtain the optimum parameters of 17-4PH stainless steel. The results show that the effect of holding pressure on black area is far greater than that of injection velocity, but the increase of injection velocity is not conducive to reducing black area. Under the low mold temperature and high material molten temperature, the minimum of the black area is found, whereas in the high mold and material molten temperature, the area of weld lines is the smallest. The black area and weld lines are reduced by 78.81% and 83.85%, respectively.
出处
《铸造技术》
北大核心
2017年第10期2490-2494,共5页
Foundry Technology
基金
江苏高校品牌专业建设工程资助项目(PPZY2015B186)
