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1、 Lesson 20 Beyond CNC MachiningPPT模板下载: 行业PPT模板: 节日PPT模板: PPT素材下载: PPT图表下载: 优秀PPT下载: PPT教程: Word教程: Excel教程: 资料下载: PPT课件下载: 范文下载: 试卷下载: 教案下载: PPT论坛: TABLE OFCONTENT 1 Passage2 New Words and Expressions3 Notes4 Reading MaterialLesson 20 Beyond CNC Machining Modem manufacturing is interwoven with and
2、controlled by computer technology. Although CNC is a historical core of Computer-Integrated Manufacturing (CIM), the power of the microprocessor is used in every aspect of the manufacturing process. In this unit, we Will look at some of the other uses of computers in the CNC process. 现代制造业与计算机技术是相互交
3、织,并由计算机技术控制。虽然在历史上,CNC是计算机集成制造(CIM)的核心,但是,微处理器已经应用到制造过程的方方面面。在这一章我们将介绍一下CNC技术中计算机的其他应用。 Lesson 20 Beyond CNC Machining1. Computer-Integrated Manufacturing Computer-Integrated Manufacturing (CIM) is the overall umbrella of computer management in the manufacturing process. CIM is a system whereby all
4、aspects of a companys operation are computerized and tied to a common database. An important element of CIM is CAD/CAM and DNC. A CIM system unifies business. engineering, process planning, inventory, manufacturing, and postproduction. A CIM system is like an orchestra. Each component duty must work
5、 with the others through a single database, central software, and an open communications network. Each task is an independent process that must work with all others. Many types of strategies have been formulated to increase the efficiency of operations within CIM. Chief among them are Group Technolo
6、gy (GT) and Just-In-Time (JIT). Group Technology is a system for reducing needless duplication of effort. Just- In-Time is a way of operating such that all unnecessary waste and invaluable elements are eliminated.1计算机集成制造 计算机集成制造(CIM)犹如一把大伞,覆盖计算机对整个制造过程的管理。将公司各方面的工作都计算机化并连接到一个公用的数据库,由此形成的系统称为计算机集成制造
7、(CIM)系统。 CIM的一个重要部分就是CAD/CAM和DNC。CIM系统能将商务、工程、工艺规划、库存、加工以及后处理整合起来。它就好像一个管弦乐队,通过唯一的数据库、中央软件以及开放的通信网络,每一部分的工作都必须与其他部分协调完成。 为了提高CIM的工作效率,人们设计出许多不同的方法。其中主要有:成组技术与准时制造。成组技术是一种减少不必要的重复性工作的系统。准时制造是一种去除所有不必要的浪费以及没有价值的环节的操作方法。 Lesson 20 Beyond CNC Machining2柔性制造系统 柔性制造系统(FMS)是CNC机床、机器人、工件传输装置的集成系统,该系统能从毛坯件或铸
8、件开始,完成所有必需的加工,工件处理与检测,最终形成一个工件或组件成品。它完全是一个基于软件的全自动无人生产装配线(图20-1)。柔性制造系统由4个主要部分组成:CNC数控机床、工件装配机器人、工件或刀具传输装置。 2. Flexible Manufacturing System A flexible machining system is a system of CNC machines, robots, and part transfer vehicles that can take a part form raw stock or casting and perform all nece
9、ssary machining, part handling, and inspection operations to make a finished part or assembly (Figure 20-1). It is an entire unmanned, software-based, manufacturing/assembly line. 图20-1 柔性制造系统Lesson 20 Beyond CNC MachiningFigure 20-1 A flexible manufacturing system FMS is capable of round-the-clock
10、production with little, if any, wasted time and less human intervention. Efficient use of FMS can reduce costs in two ways. They can reduce costs through more efficient part production and through lower labor costs. Lesson 20 Beyond CNC Machining FMS能够进行连续不断的生产,很少有浪费时间和人工干预的情况。有效利用FMS能够在两个方面降低成本,一是提
11、高零件生成效率,二是降低人员成本。Note 其中,if any是对little的进一步说明,由于不大符合汉语的语言习惯,所以可以不必翻译出来。 interweave ;int=(:)wi:v v.(使)交织,织进, (使)混杂 historical hist6rik=l adj. 历史(上)的,有关 历史的 core k6: n. 果核,中心,核心 integrated intiGreitid adj. 综合的,完整的 aspect 7spekt n. 样子,外表,面貌,(问题等的)方面 overall =uv=r6:l adj. 全部的,全面的 umbrella 2mbrel= n. 伞,庇
12、护 computerize k=mpju:t=raiz vt. 用计算机处理,使计算机化 New Words and Expressions orchestra 6:kistr= n. 管弦乐队,乐队演奏处 duty dju:ti n.义务,责任,职责,职务,税 incapable inkeip=bl adj. 无能力的,不能的 duplication ;dju:plikei5=n n. 副本,复制 inspection inspek5=n n. 检查,视察 round-the-clock 全天的,全天候的,不分昼夜的,连续不停的 intervention ;int=(:)ven5=n n. 干涉 coordinate k=u6:dinit vt. 调整,整理Lesson 20 Beyond CNC Machining