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针对模具设计的教学特点和要求,阐述了课程改革中进行案例教学的实践过程。采用启发式教学方式,通过教师与学生对案例的互动分析,引导学生从生产实际出发,主动思考案例中相关问题的解决方案,并基于对方案的比较以及对相关正反案例的比较,使学生在了解模具设计新理念和技术的同时,深层次系统地理解模具设计相关概念、基础理论与设计要点。 相似文献
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语言文字,是智慧的灵魂;语文水平高,口吐莲花,妙语连珠,人脉成串;执笔从容,临纸挥毫,文章锦绣。本文从教学方法要先进合理开始谈起,论述了多赞美少批评的意义,解读了书写速度与阅读速度的关系,最后以提问、思考促进思维发展结尾。 相似文献
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The structure stiffness of presses has great effects on the forming precision of workpieces, especially in near-net or net shape forming. Conventionally the stiffness specification of presses is empirically determined, resulting in poor designs with insufficient or over sufficient stiffness of press structures. In this paper, an approach for the structure design of hydraulic presses is proposed, which is forming-precision-driven and can make presses costeffective by lightweight optimization. The approach consists of five steps:(1)the determination of the press stiffness specification in terms of the forming precision requirement of workpieces;(2)the conceptual design of the press structures according to the stiffness and workspace specifications, and the structure configuration of the press;(3)the prototype design of the press structures by equivalently converting the conceptual design to prototypes;(4)the selection of key structure parameters by sensitivity analysis of the prototype design; and(5)the optimization of the prototype design. The approach is demonstrated and validated through a case study of the structure design of a 100 MN hydraulic press. 相似文献
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