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一、教材分析1.地位和作用内容选取全国中等职业技术学校机械类专业通用教材《机械基础》第七章第三节。它是“铰链四杆机构的演化”知识的讲授基础,也是进一步学习凸轮机构、其他常用机构和后续课程“刨削、插削”内容的理论精华。因此,可以说本节课是第七章内容的核心,是《机械基础》课程学习的重点,在理论课与专业课之间起着承上启下的作用。2.教学目标根据本教材教学大纲及教学内容,结合学生的接受能力和实际水平,确定本节课的教学目标。(1)知识目标:掌握和理解铰链四杆机构的曲柄存在条件及其推论,并能灵活运用。(2)能力目标:通
First, the textbook analysis 1, the status and role Select the contents of the National Secondary Vocational and Technical School of Mechanical Engineering, general textbook “mechanical basis” Chapter VII of the third quarter. It is the basis for teaching “The Evolution of a Four-Bar Hinge Mechanism,” and is the theoretical essence of further learning about cam mechanisms, other commonly used mechanisms, and subsequent courses. Therefore, it can be said that this lesson is the core of the seventh chapter, which is the focus of the “mechanical foundation” course. It plays the role of a link between theoretical courses and specialized courses. 2. Teaching Objectives According to the textbook syllabus and teaching content, combined with the acceptability of students and the actual level to determine the teaching objectives of this lesson. (1) Knowledge Objectives: To master and understand the existence of the crank of the hinged four-bar mechanism and its corollary, and can be flexibly applied. (2) ability target: pass