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铸铁件重量及浇冒口系统的计算机辅助计算与设计程序ＺＴＰＲＯ采用多级菜单引导，人机对话输入输出，在ＡＵＴＯＣＡＤ环境下绘制典型件的工艺图及工艺卡；铸件规则形体部分用公式精确计算重量，不规则部分用积分方法近似计算，二者的有机结合，使铸件重量计算精确；采用最佳的阻流面积计算法设计浇注系统；球铁件采用先进的无冒口技术设计冒口。最后，举例说明了ＺＴＰＲＯ程序的应用。
ZTPRO multi-level menu guide, man-machine dialogue input and output, in the AUTOCAD environment to draw a typical piece of the process drawings and technology cards; cast part of the body shape formula accurately calculated using the formula The weight and irregularity are approximated by the integral method. The organic combination of the two makes the calculation of the weight of the castings accurate. The casting system is designed by the best method of calculating the area of baffled area. The ductile iron is designed with the advanced riserless technology. Finally, an example of the application of the ZTPRO program is given.