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| 1 | ZL101齿轮箱箱体砂型铸造工艺优化显示文摘根据齿轮箱箱体的结构特点及技术要求,选择砂型铸造方法进行铸造工艺设计,选择树脂砂作为造型材料。利用ViewCast软件进行充型和凝固模拟,预测铸造缺陷产生位置,分析了充型和凝固过程中铸件产生缺陷的原因。在此基础上,对齿轮箱箱体的铸造工艺方案进行了优化,最终选择阶梯式浇注系统,直浇道、横浇道、内浇道截面积比为1:2:4,冒口选择发热保温冒口,浇注温度为750℃。使用优化后的铸造工艺方案进行了数值模拟及实际浇注试验,发现铸件几乎没有缺陷,满足了实际生产中对铸件质量的要求。 | 陈鹏飞 米国发 王建军 毛长城 许磊 | 2018 | 铸造2018，67，12： | 6 |
| 2 | Using finite difference method to simulate casting thermal stress显示文摘Thermal stress simulation can provide a scientific reference to eliminate defects such as crack,residual stress centralization and deformation etc.,caused by thermal stress during casting solidification.To study the thermal stress distribution during casting process,a unilateral thermal-stress coupling model was employed to simulate 3D casting stress using Finite Difference Method(FDM),namely all the traditional thermal-elastic-plastic equations are numerically and differentially discrete.A FDM/FDM numerical simulation system was developed to analyze temperature and stress fields during casting solidification process.Two practical verifications were carried out,and the results from simulation basically coincided with practical cases.The results indicated that the FDM/FDM stress simulation system can be used to simulate the formation of residual stress,and to predict the occurrence of hot tearing.Because heat transfer and stress analysis are all based on FDM,they can use the same FD model,which can avoid the matching process between different models,and hence reduce temperature-load transferring errors.This approach makes the simulation of fluid flow,heat transfer and stress analysis unify into one single model. | Liao Dunming Zhang Bin Zhou Jianxin Liu Ruixiang Chen Liliang | 2011 | China Foundry2011，8，2： | 6 |
| 3 | New filling system design for bolster casting and computer simulation显示文摘The new filling system is smooth filling without gas gap. It works well in avoiding the generation of defects such as porosity and inclusion. The pouring basin, sprue, runner and the gate of the bolster casting were designed according to the principle of the new filling system. The filling and solidifciation process of the bolster casting were also simulated. It was found that the filling process was smooth, and air entrapment and shrinkage were avoided. Finally, a further validation of the new filling system of bolster casting was carried out in a foundry. | Zhang Yutuo Li Guimao Zhang Wanning Wang Chengzhi | 2010 | China Foundry2010，7，4： | 4 |
| 4 | 挤压机前梁充型过程数值分析显示文摘本文对挤压机前梁铸件充型过程进行分析,设计合理的阶梯式浇注系统,并采用数值模拟和水力学计算两种方法对挤压机前梁铸件充型过程进行分析。首先,根据挤压机前梁铸件的尺寸形状,设计出合理的阶梯式浇注系统。然后,利用有限元软件PROCAST对初始工艺方案的流动场进行模拟分析,并对初始工艺方案进行优化改进,同时对优化后的工艺方案进行流动场的数值模拟。最后,对初始工艺方案和优化工艺方案建立水力学模型,并对两种工艺方案下的钢液流动状态进行分析。通过分析验证,优化工艺方案下铸件充型过程平稳,不易产生缺陷。 | 史艳国 刘振华 张庆玲 李敏 | 2013 | 新型工业化2013，2，6： | 1 |
| 5 | 板状铸钢件凝固补缩规律研究显示文摘采用铸造模拟软件ProCAST研究多种铸造工艺参数对板状铸钢件补缩距离的影响,包括冷铁的使用,板状件的宽厚比,铸件的化学成分,以及浇铸温度等。研究结果表明,冷铁对板状件的冒口区基本没有影响,而末端区长度随着冷铁厚度的增大逐渐增长,且增长趋势逐渐变平缓;同种材料的板状件,冒口区和末端区的长度均随着宽厚比的增加而增加,当宽厚比达到某一临界值之后补缩距离不再增加;化学成分以及过热度对板状件补缩的影响相似,但不同情况下的最大补缩长度不同。 | 刘孝山 吉晓霞 郭建政 | 2015 | 一重技术2015，，5： | 1 |
| 6 | Techniques for improving computational speed in numerical simulation of casting thermal stress based on finite difference method显示文摘Finite difference method (FDM) was applied to simulate thermal stress recently, which normally needs a long computational time and big computer storage. This study presents two techniques for improving computational speed in numerical simulation of casting thermal stress based on FDM, one for handling of nonconstant material properties and the other for dealing with the various coefficients in discretization equations. The use of the two techniques has been discussed and an application in wave-guide casting is given. The results show that the computational speed is almost tripled and the computer storage needed is reduced nearly half compared with those of the original method without the new technologies. The stress results for the casting domain obtained by both methods that set the temperature steps to 0.1 ℃ and 10 ℃, respectively are nearly the same and in good agreement with actual casting situation. It can be concluded that both handling the material properties as an assumption of stepwise profile and eliminating the repeated calculation are reliable and effective to improve computational speed, and applicable in heat transfer and fluid flow simulation. | Xue Xiang Wang Yueping | 2013 | China Foundry2013，10，2： | 0 |
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