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Study on Expert CAD System for Rotary Shaft

转轴专家CAD系统的研究

基本信息

批准号：
01860034
负责人：
SAKAI Jun
金额：
$ 4.1万
依托单位：
Faculty of Agriculture, Kyushu Univ.
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research (B).
财政年份：
1989
资助国家：
日本
起止时间：
1989 至 1990
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-01860034/
关键词：
Expert CAD System Tractor Rotary Blade CAM FEM Rotary Shaft デ-タベ-ス Fortran ロ-タリ耕うん刃の配列シミュレ-ションパレ-ト最適

项目摘要

This research deals with the expert CAD system to be used for the planning design of important machine elements for a tractor-mounted rotary tiller which is becoming a main tillage equipment for paddy rice cultivation in Asia. The all systems had to consist of many conventional engineering know hows with newly analyzed design equations.In case of the rotary blade, twenty-nine design parameters were selected and put into the computer for the designer to design a optimum blade within only one hour, while manual design needs one week. Then, FEM was applied to express the shape not only of three dimensional views but also from any direction, and used for calculating both the weight and the location of the center of the gravity, and also to manufacture the modern shell-mold of the blade as a CAM technology.The expert CAD system was studied to obtain an optimum rotary shaft which is equipped with many rotary blades. The equations to express basic performances of the tiller were analyzed and a new graphical expression to show all the basic performances in one page was proposed. Then, the time of astronomically numerous calculations to estimate all kinds of rotary shafts had to be shortened. The method to obtain the data-base of accumulating a few thousand candidates of only excellent rotary shafts was discussed and realized. In the next stage, a decision-making software for such weight of each performance as the designer wants was composed with the information engineering. Then. the expert CAD system to design the ideal shaft was built into a personal computer.

本研究旨在开发一个专家CAD系统，用于拖拉机悬挂式旋耕机重要机械部件的规划设计。所有的系统都必须由许多传统的工程知识和新分析的设计方程组成，以旋转叶片为例，选择了29个设计参数，并将其输入计算机，设计人员只需一个小时即可设计出最佳叶片，而手工设计需要一周。然后，应用有限元法不仅可以从三维视图而且可以从任意方向表达叶片的形状，计算叶片的重量和重心位置，还可以利用计算机辅助制造（CAM）技术制造叶片的现代壳型，并研究了专家CAD系统，以获得一个装有多个旋转叶片的最佳旋转轴。分析了表达分蘖器基本性能的方程，提出了一种新的图形表达式，可以在一个页面中显示所有的基本性能。然后，天文数字众多的计算，以估计各种旋转轴的时间必须缩短。讨论并实现了累积几千个优秀旋转轴候选数据库的方法。在下一阶段，与信息工程相结合，编制了一个决策软件，以满足设计者对各性能指标权重的要求。那设计理想轴的专家CAD系统被内置到个人计算机中。