论文部分内容阅读
本文采用水模拟方法对阶梯式浇注系统的充填规律进行了研究,探讨了控制上层浇道提前溢流现象和各内浇道量分配方法,提出用△h=(ξ_(1-2)+ξ_0)(V_2/2g)予测和控制浇注过程中反直浇道与型腔内液面差的变化规律,引用水力学的管网计算原理,使用逐步渐近法来控制和计算各浇道的流量.文中对阶梯式浇注系统的设计方法进行了探讨.在此基础上使用微机进行浇注系统辅助设计,提供了典型铸件的浇注系统设计程序,使用此程序可以严格地控制上层浇道提前溢流现象、各层浇道的流量分配及浇口杯不发生溢流,并迅速地打印出铸造工艺卡,绘出浇注系统结构图,以所需的时间步长输出充型过程中各时刻直浇道、反直浇道和型腔中的液面上升高度及各内浇道的流量,最后在微机屏幕上显示充填过程.
In this paper, the filling rules of stepped gating system were studied by using water simulation method. The control overflow phenomenon of upper sprue and the allocation of each sprue volume were discussed. It was proposed that △ h = (ξ - (1-2) + ξ 0 ) (V 2 / 2g) to predict and control the pouring process in the pouring spout and the cavity surface of the difference between the variation, the reference to the principle of hydraulics pipe network, the use of asymptotic approach to control and calculate each runner Flow.This paper discusses the design method of stepped gating system.On the basis of this, the design of gating system of microcomputer is used to design the gating system of typical castings, and the program of gating system of typical castings can be used to strictly control the overflow of upper sprue Phenomenon, the flow of each layer of the runner gate and spill cup does not overflow, and quickly print out the casting process card, draw the pouring system structure, the time required to fill the output of the filling process at all times direct Road, anti-sprue and cavity in the liquid level rise and the flow of the runner, and finally on the computer screen to display the filling process.