共查询到19条相似文献,搜索用时 154 毫秒
1.
2.
根据均衡凝固理论,用计算机辅助设计和数值模拟的方法确定汽车后桥的铸造工艺.利用UG软件精确计算铸件的模数分布情况,根据均衡凝固理论的均衡段定义划分补缩区域,确定冒口的大致位置,在此基础上,确定铸件的浇注位置、分型面;然后确定冒口的准确位置以及浇注系统的总体型式,从而得到总体铸造工艺方案;其后按照均衡凝固理论进行铸件浇冒口系统的详细计算设计;最后用FT-Star数值模拟软件对所设计的铸造工艺进行校核模拟,观察铸件充型、凝固过程,发现铸造过程中可能出现的缺陷,经比较后得到较为合理的铸造工艺. 相似文献
3.
基于铸件均衡凝固理论,拟定锌锭模铸件的浇注方案及浇注系统的设计计算;然后利用Pro/E和Procast软件,模拟锌锭模铸件的浇注工艺过程.对比结果表明,两者基本吻合.通过模拟可以预知铸件可能产生的铸造缺陷,优化铸造工艺. 相似文献
4.
5.
6.
介绍了核电三级余热排出泵的材料要求和零件结构,采用模数法设计并计算冒口,使用铸造数值模拟软件Viewcast进行充型、凝固模拟分析,验证浇注系统、冒口和冷铁的尺寸及具体位置,保证铸造工艺设计的正确性和准确性,确定铸造工艺设计的实施方案.通过加强余热排出泵铸造生产中工序环节的控制,最终得到符合标准要求的高质量铸件. 相似文献
7.
8.
门框底衬铸钢件的铸造工艺设计及数值模拟 总被引:3,自引:3,他引:0
运用传统方法设计了门框底衬铸钢件的铸造工艺:包括分型面、浇注位置的选择、铸造工艺参数的确定以及浇注系统、冒口、冷铁的设计.根据铸件形状较复杂的特点,设计了两个内浇道;将铸件划分为4个补缩区域进行补缩,并配合冷铁来实现铸件的顺序凝固.用Pro/E软件建立了铸件的三维模型,采用ViewCast铸造模拟软件对铸件的凝固过程进行了模拟计算.模拟结果显示,在门框底衬凸台处会产生缩孔、缩松缺陷.根据数值模拟结果并结合理论分析,对铸造工艺方案进行了优化.通过改进工艺,最大程度地消除了铸造缺陷,从而获得了合理的铸造工艺方案. 相似文献
9.
10.
11.
12.
13.
14.
15.
采用MAGMA 5.0软件对大型柴油机缸体KAI30 18V的铸造过程进行了模拟。以缩松、热节、最后凝固区域和铸件模数为判据,对缩松、缩孔可能出现的位置及大小进行预测,以验证工艺方案可行性。 相似文献
16.
1. IntroductionNumerical simulation of casting process is a technologyto reconstruct and advance the traditional foundry industryby using computer technology. It has important effect onreducing production cost and improving competitiveability of foundry industry. Its application and popularizat-ion will bring great economic benefits and social benefitsfor both foundry industry and society.This paper introduced the function modules of InteCASTsoftware and some new techniques adopted by InteC… 相似文献
17.
《中国铸造》2016,(6):375-382
The traditional foundry industry has developed rapidly in recently years due to advancements in computer technology. Modifying and designing the feeding system has become more convenient with the help of the casting software, InteCAST. A common method of designing a feeding system is to ifrst design the initial systems, run simulations with casting software, analyze the feedback, and then redesign. In this work, genetic, fruit lfy, and interior point optimizer (IPOPT) algorithms were introduced to guide the optimal riser design for the feeding system. The results calculated by the three optimal algorithms indicate that the riser volume has a weak relationship with the modulus constraint; while it has a close relationship with the volume constraint. Based on the convergence rate, the fruit lfy algorithm was obviously faster than the genetic algorithm. The optimized riser was also applied during casting, and was simulated using InteCAST. The numerical simulation results reveal that with the same riser volume, the riser optimized by the genetic and fruit lfy algorithms has a similar improvement on casting shrinkage. The IPOPT algorithm has the advantage of causing the smalest shrinkage porosities, compared to those of the genetic and fruit lfy algorithms, which were almost the same. 相似文献
18.
船用汽轮机后汽缸下半铸件结构复杂,质量要求高,有较高的生产难度.采用ProCAST铸造模拟软件计算铸件模数,根据模数计算设置冒口;模拟浇注过程,确保充型过程快速平稳;对铸件凝固过程模拟优化,实现顺序凝固,保证了铸件致密度. 相似文献
19.
1. IntroductionDie castings are widely used because of their highstrength and good performance. Die casting is oftenapplied in magnesium-aluminum alloys, especially forthose thin-walled components with complicate shape,because of their excellent casting ability [1].Die casting is a complex process containing severalstages. Considering the design of the vent gate and overflowin the mold, Garber simulated the tilling process [2,3]. Andhe considered the changes of melt when cast using aplunger. … 相似文献