共查询到18条相似文献,搜索用时 218 毫秒
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盒形塑件的几何构型与计算机充模流动模拟 总被引:3,自引:0,他引:3
基于Hele_Shaw流动数学模型 ,给出了构造3D塑件CAD模型并向CAE模型转换的方法和技术 ,通过对塑件进行有限元网格的剖分以及注射成型过程的数值模拟 ,得到了减少塑件充模流动成型缺陷 ,改进熔体充模效果及产品设计的技术方法 相似文献
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Moldflow/MPI在双色注射成型中的应用 总被引:3,自引:1,他引:2
利用三维模拟软件Moldflow/MPI对MP3内、外壳双色注射成型过程进行模拟分析,对熔体充模时间、塑料熔体温度分布、塑件冷却温度和塑件翘曲进行分析比较,优化了双色注射成型工艺及模具设计。 相似文献
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通过对一种小型继电器产品中薄壁线圈架塑件成型材料及形状结构的分析,针对生产过程中线圈架塑件存在线轴壁厚不均、偏心、欠压变形等缺陷,造成继电器产品校正使用中存在高压击穿、性能参数不稳定的问题,设计完成与传统注射模结构相区别,将线圈架塑件成型主型芯倒装于注射模定模部分,成型后靠注塑机开模动作,采用斜导柱延时开模结构,将成型主型芯从线圈架塑件中脱出,而动模部分无塑件顶出系统的注射模新结构。 相似文献
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Numerical simulation and experimental investigation of two filling methods in vertical centrifugal casting 总被引:2,自引:0,他引:2
WU Shi-ping LI Chang-yun GUO Jing-jie SU Yan-qing LEI Xiu-qiao FU Heng-zhi 《中国有色金属学会会刊》2006,16(5):1035-1040
1 Introduction Titanium alloys possesses a high potential for production of work pieces with high strength, mechani- cal properties and high corrosion resistance, which makes them widely applied in aviation, astronavigation and civil fields[1- 5]. However… 相似文献
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He Yong Liu Xuefeng Wang Zhen Xie Jianxin University of Science Technology Beijing Beijing China 《稀有金属材料与工程》2011,(Z3)
Since processing parameters have always been assumed to be stable in the current finite element numerical simulation of dieless drawing process, the simulation results for the product dimension tend to stabilize gradually. In fact, the dimension fluctuation exists in the forming process all the while. A mathematical model of Gauss distribution for processing parameters was employed and a finite element numerical model of dieless drawing process with non-steady processing parameters was established. Dieless ... 相似文献
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熔模精密铸造蜡模充型过程的数值模拟 总被引:5,自引:3,他引:2
对熔模精密铸造料的流变性和充型过程进行了分析,确立了模料充型过程数值模拟的数学模型。利用计算机机数值模拟技术,建立了相关的软件系统。对端盖铸件的蜡模成型过程进行了模拟,结果与试验验证基本一致。 相似文献
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对粉末共注射充模流动过程进行数值分析和实验验证。采用实验和数值拟合的方法确定芯/壳层界面的厚度,并运用改进的控制体积法对芯、壳层喂料前沿进行追踪。采用有限元和有限差分法对控制方程组进行数值求解,用Matlab进行程序开发,获得芯、壳层充模过程中的熔体前沿分布以及温度场和压力场的分布情况。将模拟结果与实验结果进行对比分析,发现在充填初期,模拟的喂料前沿位置与实验较为吻合,但随着充填的进行,两者偏差增大,其原因可能是在模拟过程中没有考虑注射坯的收缩。 相似文献
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The microvia filling process used in the high-density interconnect printed circuit board manufacturing industry was investigated by multi-physical coupling technology. To achieve a perfect filling, SPS (bis-(sodium-sulphopropyl)-disulphide), EO/PO (ethylene oxide and propylene oxide block co-polymers) and PEOPI (polyethylene oxide-polyimide) were used. Furthermore, electrochemical behaviours of electrodeposition were investigated by cyclic voltammetry, galvanostatic potential transient measurement and dynamic potential polarisation technology. Through numerical simulation, the relationship between coverage of additive, concentration of additive, rotating speed of rotating disc electrode, exchange current density and curve slope was fitted. Based on multi-physical coupling to copper electrodeposition, a mathematical model of microvia filling was built to simulate the filling process by a finite element method, and a systematic analysis of the whole filling process was carried out. The void-free microvia filling and filling process with different shapes were finally achieved in acid copper electroplating solutions consisting of 0.3?M CuSO4·5H2O, 0.2?M H2SO4 and 80?mg?L?1 Cl? (virgin make-up solution) plus additives SPS, EO/PO and PEOPI. Subsequently, from images of the microvia filling experiment at different times, shape evolution of the microvia filling and variation of electrodeposition rate at the bottom of the microvia and surface were analysed. The modelling result was compared with the measured data and showed good agreement with the experiment. The results showed that a process model was an excellent tool for quickly and cheaply studying the process behaviour greatly reduced need to execute time-consuming and costly experiments. 相似文献