研究开发了参数化犁体CAD三维（3D）图形系统（PSCAD），以辅助犁体优化设计。将3D概念引入CAD，开发3D绘图与实体造型的三维图像模拟技术，保证了犁体研究与优化过程的直观和透明。该系统采用达到二阶参数连续的犁体曲面、样板曲线通用数学模型和参数造型，较传统建模方法光倾性有大幅度提高，可满足任意复杂及不同型式犁体的设计要求。 Research and development of a parametric plow CAD three-dimensional (3D) graphics system (PSCAD), to assist the plow optimization design. The 3D concept into CAD, the development of 3D graphics and solid modeling of three-dimensional image simulation technology to ensure that the plow body research and optimization process intuitive and transparent. The system uses the second-order parameter continuous plow surface, sample curve general mathematical model and parameter modeling, compared with the traditional modeling method greatly improve the optical inclination, to meet any complex and different types of plow body design requirements.