犁面的计算机辅助设计

为采用计算机辅助设计犁体曲面,提出以耕作速度为基础的十二参数设计法。通过其设计原理分析,建立数学模型,研制了计算机辅助设计硬、软件系统。应用该软件计算、绘制各种幅宽犁体曲面及犁面展开图方便、快捷,比人工设计提高工效20倍以上;按绘图试制的30cm幅宽犁体,经生产试验表明,较对照犁体使用性能良好,降阻10％左右。

CAD System of Plow Body Surface

To develop CAD of plow body surface, 12-paramter plow design method is presented on the basis of plow velocity as primary design parameter. Through analysing design principle of plow body surface, mathematical model of plow body surface is established and a system of software and hardware of CAD is developed. Plow body surface drawing and its expending drawing with all sorts of plow body width is calculated and drawn by this software. The speed of drawing and expending plow body surface is 20 times faster than normal design,and the precision is high.Depending on the CAD system, NO. 34 plow body has been trial produced and tested. This article describes the comparative test results between No. 34 and BT-30 plow body in detail.Through all sorts of trial manufacture and tests, it has proved that performance of No. 34 plow body is better than BT-30, with resistance reduced by 10 percent.