模具设计与制造专业英语第2版王晓江lesson5课件教学.pptVIP

Unit Two  Lesson5 Jig and Fixture Design 教学目标及要求 1.掌握课文中有关钻具、夹具等方面的专业词汇和专业术语； 2.结合钻具、夹具的相关专业知识阅读课文，提高翻译能力。 重点 1.钻具、夹具的专业词汇和专业术语； 2.翻译课文重点：钻具、夹具的概念及类型； 钻具、夹具设计时需考虑的因素。 难句分析及翻译的基础知识 Part（Ⅱ） 翻译的基本技巧 一、词义引申（三）词义抽象化;（四）词的搭配 教学思路设计 时间分配（共100min）： 1、讲解课文中的专业词汇和术语； 2、讲解课后生词、大声朗读； 3、翻译课文，注意穿插相关专业知识； 4、分析难点句型，讲解相关语法和翻译技巧； 5、学生答疑。 Contents Background Knowledge New Words and Phrased Text Analysis Questions Glossary of Terms Language Points Translating Techniques Reading Materials Summary References Background Knowledge Jig and Fixture Design Jigs are workholders which are designed to hold, locate,and support a workpiece while guiding the cutting tool throughout its cutting cycle. Jigs can be divided into two general classifications: drill jigs and boring jigs. Fixtures are workholders which are designed to hold, locate, and support the workpiece during the machining cycle. Unlike jigs, fixtures do not guide the cutting tool, but rather provide a means to reference and align the cutting tool to the workpiece. New Words and Expressions Terms： 1. machining: 切削加工 drill 钻孔 bore 镗孔 tap 攻螺纹 chamfer 倒角 countersink 钻埋头孔/钻锥形孔 counterbore 扩孔 New Words and Expressions Terms： 2. production cost 生产成本 production capacity 生产能力 production quantity 生产量 production-runs 流水线生产 productivity 生产率 go into production 投入生产 a finished product 成品率 mass production 大量生产 Drilling jig Text Jig Drill jigs are, by far, the most common. Drill jigs are generally used for drilling, tapping, and reaming, but may also be used for countersinking, counterboring, chamfering, and spotfacing. Boring jigs, on the other hand, are normally used exclusively for boring