执手多型腔压铸工艺优化  

Optimization of Multi-cavity Die Casting Process for Handle

作　　者：陈璇 杨程[1] 张金虎 谢晓东 CHEN Xuan;YANG Cheng;ZHANG Jin-hu;XIE Xiao-dong(School of Metallurgical Engineering,Xi'an University of Architectural Science and Technology,Xi'an 710055,China;Guangdong Hehe Construction Hardware Manufacturing Co.,Ltd.,Guangdong Foshan 528100,China)

机构地区：[1]西安建筑科技大学冶金工程学院,西安710055 [2]广东合和建筑五金制品有限公司,广东佛山528100

出　　处：《精密成形工程》2023年第1期25-33,共9页Journal of Netshape Forming Engineering

基　　金：国家自然科学基金(51874226);陕西省重点研发计划(2018ZDXM–GY–120)。

摘　　要：目的研究适用于执手产品稳定生产的浇注方案及其工艺参数。方法采用控制变量法,以模具型腔表面热集中区域的等效应力为指标,分别分析两种浇注方案在不同压射比压、压射速度和浇注温度下的型腔表面稳定性,通过正交试验优化工艺参数,并对执手产品进行生产验证。结果当模具达到热平衡状态后,阶梯式浇注方案在各组工艺参数下的等效应力均小于分散式浇注,对阶梯式浇注方案的工艺参数进行正交试验优化,发现工艺参数对型腔表面稳定性的影响程度从大到小依次是压射比压、浇注温度、压射速度。正交试验优化后的结果为A_(1)B_(1)C_(1),即压射比压10 MPa、压射速度5 m/s、浇注温度640℃。选择优化后的工艺参数进行执手生产,得到的执手产品外形轮廓清晰,且无缩孔缺陷。结论执手产品阶梯式浇注在各组工艺参数下的型腔表面稳定性均优于分散式浇注。阶梯式浇注工艺参数优化后试生产得到的产品质量良好,确定为执手产品最终的生产方案。The work aims to study the casting scheme and process parameters suitable for stable production of handle.With the equivalent stress of the heat concentration area on the surface of the die cavity as the index,the control variable method was used to analyze the stability of the cavity surface by two casting schemes under the conditions of different specific injection pressure,injection speed and casting temperature.The process parameters were optimized by orthogonal test,and the handle was verified in production.When the die reached heat balance state,the equivalent stress of step casting scheme under each group of process parameters was less than that of dispersed casting.The process parameters of step casting scheme were optimized by orthogonal test and it was found that the effect degree of process parameters on the surface stability of cavity was specific injection pressure,casting temperature and injection speed in descending order.The result optimized by orthogonal test was A_(1)B_(1)C_(1),i.e.specific injection pressure of 10 MPa,injection speed of 5 m/s and casting temperature of 640℃.The optimized process parameters were selected for production of handle,and the shape of the handle was clear without defects such as shrinkage cavity.The cavity surface stability of step casting is better than that of dispersed casting.After the step casting process parameters are optimized,the product obtained from trial production has good quality,so the step casting is determined as the final production scheme of the handle.

关 键 词：执手产品 等效应力 最大变形量 浇注方案 正交试验 

分 类 号：TG292[金属学及工艺—铸造]