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A System for Computer Aided Design of Cold Forging Process

冷锻工艺计算机辅助设计系统

基本信息

批准号：
01850156
负责人：
OSAKADA Kozo
金额：
$ 3.9万
依托单位：
Osaka University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research
财政年份：
1989
资助国家：
日本
起止时间：
1989 至 1991
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-01850156/
关键词：
Forging Process Design Expert System Simulation FEM AI Neural Network Fuzzy

项目摘要

An expert system has been developed to assist the cold forging engineers in planning the forming process by utilizing various innovative technologies. The primary functions of the system can be enumerated as knowledge acquisition, product registration, process generation, determination of order of evaluation, process evaluation, process visualization, and verification of metal flow of process in the order of their successive implementations in the system.Process candidates of any given product are generated efficiently with either the variant-and-generative approach or the neural network system for process generation. The process evaluation strategy to evaluate each process according to the order of evaluation determined significantly reduces the time spent for evaluation, and the metal flow simulation carried out at the end of the process evaluation ensures only a pretty feasible process is adopted as the actual process. The combination of FEM simulation and neural networks is found effective to acquire knowledge to compensate the deficiency of the knowledge base of the system.Although the prototype of the system has been established, there is a lot of work that needs to be accomplished in the future to complete the expert system for process planning of cold forging.(1) At the present stage, only four forming methods are considered in the system. Other combined cold-forming methods should be taken into account.(2) The knowledge base of the system is still not sufficient to enable quantitative evaluation of various operations. The applicability of the system should be broadened in the future.(3) Occurrence of the internal ductile fracture and the surface crack of the product should be predicted by the evaluation system. Fatigue crack, tribology, etc. of the tool have to be considered in a system to predict tool life.(4) Energy consumption, cost, and other economical factors should also be accounted in process selection.

利用各种创新技术，开发了一个专家系统，以帮助冷锻工程师规划成形工艺。该系统的主要功能包括知识获取、产品注册、工艺生成、评价顺序确定、工艺评价、工艺可视化、和验证过程的金属流的顺序在系统中的连续实施。任何给定的产品的工艺候选人有效地产生与变体和-生成的方法或神经网络系统的过程生成。根据确定的评估顺序对每个工艺进行评估的工艺评估策略大大减少了评估所花费的时间，并且在工艺评估结束时进行的金属流动模拟确保了仅采用相当可行的工艺作为实际工艺。将有限元模拟与神经网络相结合，可以有效地获取知识，弥补系统知识库的不足，虽然系统的原型已经建立，但要完善冷锻工艺设计专家系统还有许多工作要做。(1)现阶段，该系统只考虑了四种成形方法。应考虑其他组合冷成型方法。(2)该系统的知识库仍然不足以对各种业务进行定量评价。今后应扩大该制度的适用范围。(3)评价系统应预测产品内部韧性断裂和表面裂纹的发生。刀具的疲劳裂纹、摩擦学等必须在一个系统中加以考虑，以预测刀具寿命。(4)在工艺选择中还应考虑能耗、成本和其他经济因素。