基于砂型柔性挤压成形工艺的起模时间实验研究  

Experimental Study on Stripping Time of Molding Sand Based on Flexible Extrusion Process

作　　者：董晓传 单忠德[1] 刘丽敏 杨颜绮 顾兆现 姜二彪 DONG Xiaochuan;SHAN Zhongde;LIU Limin;YANG Yanqi;GU Zhaoxian;JIANG Erbiao(State Key Laboratory of Advanced Forming Technology and Equipment,China Academy of Machinery Science and Technology,Beijing 100044,China;National-Local Joint Engineering Laboratory of Intelligent Manufacturing Oriented Automobile Die&Mould,Tianjin University of Technology&Education,Tianjin 300222,China)

机构地区：[1]机械科学研究总院集团有限公司先进成形技术与装备国家重点实验室,北京100044 [2]天津职业技术师范大学汽车模具智能制造技术国家地方联合工程实验室,天津300222

出　　处：《铸造技术》2020年第12期1109-1112,共4页Foundry Technology

基　　金：国家杰出青年科学基金资助项目(51525503);机械科学研究总院技术发展基金(312008Q9)。

摘　　要：基于数字化砂型柔性挤压/切削复合成形技术,研究不同树脂及硬化剂含量对砂型起模时间及性能的影响。实验结果表明,硬化剂含量的变化仅对起模时间呈现非线性影响,而对砂型24 h抗拉强度和透气性几乎无影响。随着树脂含量的增加,砂型起模时间减小,24 h抗拉强度增加,透气性降低,同时对不同硬化剂和树脂配比导致的起模时间规律曲线进行多元线性回归,获得了不同树脂及硬化剂配比条件下的砂型起模时间的预测模型,为砂型柔性挤压成形工艺的排产及生产效率的提高提供了理论依据。Based on the flexible extruding/cutting composite forming technology of digital sand mould,the effects of different resin and catalyst content on the stripping time and performance of sand mould were studied.The results show that the change of catalyst content has a nonlinear effect only on the molding time,but has little effect on the 24 h tensile strength and air permeability of sand mold.With the increase of the content of resin sand mould stripping time decreases,and 24 h increase tensile strength,permeability is lower,at the same time with different ratio of resin and catalyst to draw time rule curve of multivariate linear regression,the ratio of different resin and catalyst under the condition of sand mould stripping the prediction model of time,flexible extrusion forming technology for sand production scheduling and production efficiency to provide a theoretical basis.

关 键 词：砂型挤压/切削复合成形技术 柔性挤压 配比方案 起模时间 

分 类 号：TG242[金属学及工艺—铸造]