数控技术专业英语

• 将……扩展成 expand…..into • 焊接 welding • 汽车工业 automotive industry • 器具, 器械, 装置，（家用）电器 appliance • 模具 die • 原始设备制造商 OEM original equipment manufacturer • 立式铣床 Vertical milling machine • 原型 Prototype • 快速原型制造 Rapid prototyping manufacturing • 弯曲 Bending 冲压 Stamping
• 冷却液 coolant • 柔性制造 flexible manufacturing • 工件夹紧 workholding • 小批量 small part lots • 中小批量生产 middle or small batch production • 大批量生产 mass production • 装配 assembly • 详细目录, 存货清单,（商店的）存货，库存 inventory • 第一次/第二次工业革命 the first/second industrial revolution
二、重难点句 • Let us assume that a part spent 50 hours from the time it arrived at a plant as a rough casting or bar stock to the time it was a finished product. During this time, it would be on the machine for only 2.5 hours and be cut for only 0.75 hours. The rest of the time would be spent on waiting, moving, setting up, loading, unloading, inspecting the part, setting speeds and feeds, and changing cutting tools. • NC reduces the amount of non-chip-producing time by selecting speeds and feeds, making rapid moves between surfaces to be cut, using automatic fixtures, automatic tool changing, controlling the coolant, in-process gaging, and loading and unloading the part. • The NC unit takes symbolic input and changes it to useful output, expanding a person’s concepts into creative and productive results. • Computer-assisted manufacturing (CAM) and computer integrated machining (CIM) are certainly where the future of manufacturing lies, and considering the developments of the past, it will not be too far in the future before the automated factory is a reality.
• 夹具 四、练习
Unit 8 servo controls
一、专业词汇 • 伺服控制 Servo control • 液压的 Hydraulic • 气压的 Pneumatic • 开环系统 Open-loop system • 闭环系统 closed-loop system • 伺服电机 Servomotor • 步进电机 stepper motor; stepping motor • 直流电机 DC (direct current) motor
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三、专业知识点
• OEM：即代工生产，也称为定点生产，俗称代工，基本含义为品牌生 产者不直接生产产品，而是利用自己掌握的关键的核心技术负责设计 和开发新产品，控制销售渠道，具体的加工任务通过合同订购的方式 委托同类产品的其他厂家生产。之后将所订产品低价买断，并直接贴 上自己的品牌商标。这种委托他人生产的合作方式简称OEM，承接加 工任务的制造商被称为OEM厂商，其生产的产品被称为OEM产品。 • 原始设计制造商，即ODM （Original Design Manufacturer）。某些 制造商设计出产品后，会被别的企业看中，要求配上该企业自己的品 牌名称来生产、销售，或者做一些小的设计上的改动进行生产，并且 以自己的品牌来销售。这样做的最大的好处是后者减少了自己的研发 时间。习惯称前者为后者的ODM。 • 工装即工艺装备，指制造过程中所用的各种工具的总称。包括刀具/夹 具/模具/量具/检具/辅具/钳工工具/工位器具等。工装为其通用简称。
• 交流电机 AC (alternate current) motor • 三相异步电机 three-phase asynchronous motor • 精密丝杆 precision lead screw • 滚珠丝杆 ball screw • 反馈 feedback • 传感器,变频器;变换器 transducer • 补偿 compensation • 误差 error • 切削力 cutting force • 机床控制单元 MCU (machine control unit)
三、专业知识点 • 数控机床分类 四、练习
Unit3 advantages of NC
一、专业词汇 • 工厂 Plant • 毛坯铸件 Rough casting • 棒材 Bar stock • 安装 setting up • 转速 Speed • 进给 feed • 非切削加工时间 non-chip-producing time • 待加工表面 surface to be cut • 夹具 fixture
• 轴 Axis • 工作台 Table • 回转体工件 Round part • 滑板架 Carriage • 主轴箱 Headstock • 成型加工 Contouring • 齿轮加工 Gear cutting • 镗孔 Boring • 铰孔 Reaming • 立柱 Column • 升降台 Knee • 金属切削 Metal cutting
二、重难点句 • A numerical control machine is a machine positioned automatically along a preprogrammed path by means of coded instructions. • Advances in microelectronics and microcomputers have allowed the computer to be used as the control unit on modern numerical control machinery. • Computer aided programming languages allowed a part programmer to develop an NC program using a set of universal “pidgin English” commands, which the computer then translated into machine codes and punched into the tape. • Direct numerical control involved using a computer as a partial or complete controller of one or more numerical control machines. • Distributive numerical control employs a network of computers to coordinate the operation of a number of CNC machines. Ultimately, it may be possible to coordinate an entire factory in this manner.
三、专业知识点 • 数控系统的组成 四、练习
Unit 2 machines using NC
一、专业词汇 • 机床 Machine tool • 人工成本 Cost of labor • 切削材料/金属 Removing material/metal • 刀具 Cutting tool • 钻床 Drilling machine • 车床 Lathe • 铣床 Milling machine • 车削中心 Turning center • 加工中心 Machining center • 主轴 Spindle
Unit1 history of NC
一、专业词汇 • 数控 NC (numerical control) • 车间 Shop • 柔性的 Flexible • 控制单元 Control unit • 手工编程 Manual programming • 计算机辅助编程 CAP (computer aided programming) • 手动数据输入 MDI (manual data input) • 前进、发展 Advance • 机床 Machine tool
• 读带机 Tape reader • 穿孔带 Punched tape • 计算机数控 CNC (computer numerical control) • 三轴联动 Simultaneous three-axis movements • 立式主轴 Vertical spindle • 普遍的, 通用的 Universal • (并用两种或多种语言的)混杂语 Pidgin • 协调（v），坐标（n） Coordinate • 直接数控 DNC (Direct numerical control) • 分布式数控 DNC (Distributive numerical control) • 主机 Host computer
• 精度 Accuracy • 转塔头 Turret head • 卧式加工中心 Horizontal spindle machining center • 立式加工中心 Vertical spindle machining center
二、重难点句
• Machining center greatly increased production rates because more operations could be performed on a workpiece in one setup. • Most drilling machines are programmed on three axes. • The milling machine has always been one of the most versatile machine tools used in industry.
二、重难点句 • Servo controls can be any group of electrical, hydraulic, or pneumatic devices which are used to control the position of machine tool slides. • In the open-loop system, the tape is fed into a tape reader which decodes the information punched on the tape and stores it briefly until the machine is ready to use it. The tape reader then converts the information into electrical pulses or signals. These signals are sent to the control unit, which energizes the servo control units. The servo control units direct the servomotors to perform certain functions according to the information supplied by the tape. The amount each servomotor will move depends upon the number of electrical pulses it receives from the servo control unit. • The closed-loop system is similar to the open-loop system with the exception that a feedback unit is introduced into the electrical circuit. This feedback unit, often called a transducer, compares the amount the machine table has been moved by the servomotor with the signal sent by the control unit. The control unit instructs the servomotor to make whatever adjustments are necessary until both the signal from the control unit and the one from the servo unit are equal.