机械工程专业英语课翻译

第一篇：机械工程专业英语课翻译

Unit1 Two methods of designating limit dimensions are considered as standard.One method is the maximum material method in which the large dimension is placed above the smaller dimension for male parts, and the reverse is true for female parts.This method is well suited for small lot quantities because it is likely that the machinist himself may check the dimension of the parts.In so doing he will be verifying initially the large dimension of the male parts and the smaller dimension of the female part.other method is the maximum number method and is preferred by production and quality control departments.In this method of designating a dimension , the large number is always placed above the smaller number ,regardless of whether the part is male or female.两种方法都被看作是指定极限尺寸标准。一种方法是最大的资料法,大尺寸较小的尺寸摆在上面男性部件,事实正相反对女性的部分。这种方法很适合小批量的数量,因为它是可能的,自己可能检查机械师维度的零件。

这样做的话,他就会验证最初的男大尺寸零件和小尺寸的女性的部分。另一个方法是最大的数字方法和优先生产和质量控制部门。在该方法中,指定了一个维度,大量总是摆在上面较小的号码,不管部分男”或“女”。Unit3(1)From its inception ,quantum mechanics had two apparently different mathematical forms: the wave mechanics of E.Sehrodinger ,which emphasizes the spatial probability distributions in the quantum states ,and the matrix mechanics of W.Heisenberg, which emphasizes the transitions between states.成立以来,量子力学有两个明显不同的数学形态E.Sehrodinger波动力学的,它强调在空间概率分布的量子状态时,矩阵力学的W.Heisenberg,他们

(2)the rigid-body assumption cannot be used when internal stresses and strains due to the applied forces are to be analyzed.Thus we consider the body to be capable of deforming.such analysis is frequently called elastic-body analysis, using the additional assumption that the body remains elastic within the range of the applied force.在刚体假设时不能用内部的紧张和压力是由于受力进行分析。因此我们认为身体能变形。这样的分析常被称为elastic-body分析,利用附加假设物体保持弹性范围内应用的力量。Unit4 The relation velocity or velocity polygon method of performing a velocity analysis of a mechanism is one of several methods available.The pole represents all points on the mechanism having zero velocity.Lines drawn from the pole to point on the velocity polygon represent the absolute velocities of the corresponding point on the mechanism.A line connecting any two point on the velocity polygon represents the relative velocity for the two corresponding points on the mechanism.速度或速度的关系,执行一个多边形方法速度分析机制已有方法是其中之一。杆位代表所有的点在零速度机制。线来自杆来点在多边形代表了速度绝对速度点所对应的机制。一条线连接任何两个点在多边形的相对速度速度是两个对应点的运行机制。UNIT5 The body to be guided usually is a part of a floating link, of which not only is the path of a point p prescribed, but also the rotation of a line passing through the point and embedded in the body.For instance, the line might represent a carrier link in an automatic machinery where a point located on the carrier link has a prescribed path while the carrier has a prescribed angular orientation.Prescribing the movement of the bucket for a bucket loader is another example of motion generation mechanisms.The path of tip of the bucket is critical since the tip must perform a scooping trajectory followed by a lifting and a dumping trajectory.The angular orientation of the bucket is equally important to ensure that the load is dumping form the correct position.身体被引导通常是一个浮动的一部分环节,不仅是一个p点的路径的处方,但也转动而产生的点和线通过植入人体内。例如,也许表示一个载体线自动机械连接在一个点位于承运人规定的路径而连结承运人已规定的角方向。处方的运动为一桶桶装载机的另一个例子是运动产生机理。路径的顶端的临界自桶提示必须执行作业轨迹跟随一个提升和反倾销的轨道。吊桶角定向同样重要的是确保载荷倾销形成正确的位置。UNIT6 The competent engineer should not be afraid of the possibility of not succeeding in a presentation.In fact ,occasional failure should be expected because failure or criticism seems to accompany every really creative idea.There is a great deal to be learned from a failure , and the greatest gains are obtained by those willing to risk defeat.In the final analysis , the real failure would lie deciding not to make the presentation at all.主管工程师不应该害怕没有成功的可能在一个表现。事实上,偶尔失败应该会因为失败或批评似乎伴随每一个真正具有创造性的想法。有许多让你从中得到教训是失败的,并得到了最大的收获是那些愿意冒险失败。在最后的分析中,真正的失败会撒谎决定不做演讲。UNIT7 Kinematic synthesis, on the other hand ,is the process of designing a mechanism to accomplish a desired task.Here,both choosing the type as well as the dimensions of the new mechanism is designed the way it is, and the ability to visualize relative motion ,to reason why a mechanism is designed the way it is, and the ability to improve on a particular design are marks of a successful kinematician.Although some of this ability cones in the form of innate creativity, much of it is a learned skill that improves with practice..运动合成,另一方面,是一个过程,设计一个机制来实现所需的任务。在这里,两个选择类型以及尺寸的新的机制设计的方式,能够看清相对运动,为什么一个机制设计就是这样,并且能够提高在某一个特定设计的一个成功的kinematician标志。虽然一些这样的能力锥的形式,天生的创造力,很多都是门学问,改善与实践相结合。UNIT8 The angle between the line of action perpendicular to the centerline of the two gears in meshing.Pressure Angles for spur gears are usually 14.5 or 20 degrees, although other values can be used.Meshing gears must have the same pressure angles.In the case of a rack, the teeth have the straight sides inclined at angle corresponding to the pressure angle.2)Spur gear will be considered first for several reasons.In the first place, they are the simplest and the least expensive of gears and they may be used to transmit power between parallel shafts, also, spur gears definitions are usually applicable to other types.角度的行动路线之间的垂直中心线的两档在啮合。压力角直齿圆柱齿轮通常为14.5或20度,尽管其他价值都可以使用。啮合齿轮必须具有相同的压力角。在案件的一个架子上,牙齿有直边角度斜在相应的压力角。

2)齿轮将首先被考虑几个原因。首先,他们是最简单、最便宜的齿轮和他们的可用于传输功率的平行轴之间,同时,直齿圆柱齿轮的定义通常适用于其他类型。UNIT9 Journal bearing materials should preferably have the following characteristics: good compressive and fatigue strength;good heat conductivity;chemical inertness to shaft and housing materials , as well as lubricants;ductility , to conform to the shape of housing and journal , and to permit the embedment of foreign which would otherwise scour the shaft;reasonable price.轴承材料中应当有以下特点:良好的压应力和疲劳强度,良好的导热性、化学惰性轴和建筑材料,以及润滑剂,延性、符合形状的住房和杂志,并且允许外国,否则我们就会埋冲刷轴,价格合理。

Unit10 Conventional centrifugal pumps often have double-shrouded impellers to guide the flow and support the vanes.And the vanes and impeller casing are shaped to partially convert the velocity energy into static pressure by diffusion with in the casing.this improves efficiency somewhat， but the static pressure by diffusion inside the casing forces leakage flow back to suction;therefore “wearing” rings are necessary for sealing between the impeller and casing near the hub.传统的离心泵叶轮经常有double-shrouded指导和支持叶片流动。和叶片形状、叶轮套管部分转换速度能量进入静压通过扩散与套管。这提高了行政效率有点,但静压力内部力量通过扩散套管泄漏流回抽吸,所以“穿著“环之间是必要的,为密封叶轮和泵体附近的中心。UNIT11 When a constant-displacement pump is used and when it delivers a fixed volume of fluid to the circuit, feed control must be accomplished with metering valves.Pressure-compensated variable-displacement pimps may also with flow-control valves to ensure repetitive flows in an economical pattern.When the load is reasonably constant.the metering valve can be a fixed or adjustable orifice.Such an orifice will maintain metering valves are used.The pressure compensator maintains a constant pressure drop across the orifice regardless of load.当一个constant-displacement泵使用和当它提供了一个固定量的流体,电路、饲料控制必须做到与仪表阀门。Pressure-compensated皮条客也可能与流量控制变量,以确保重复的流阀在一个经济的模式。当载荷相当稳定。计量阀可以固定或可调节孔。这样将会保持限流阀孔口使用。保持恒定的压力补偿器压力降穿过孔无论负荷。UNIT12 Although plain carbon steels work well for many uses and are the cheapest steels and therefore the most used, they can’t completely fulfill the requirements for some work.Individual or groups of properties can be improved by addition of various elements in the form of alloys.Even plain carbon steels are alloys of at least iron, carbon, and manganese, but the term alloy steel refers to steels containing elements other than these in controlled quantities greater than impurity concentration or, in the case of manganese, greater than 1.5%.虽然碳素钢好工作的许多用途,是最便宜的钢材,因此最常用的,它们不可能完全满足以上要求一些工作。个人或群体的特性,可改善添加各种形式的合金元素。即使碳素钢至少是合金铁、碳、锰,但是术语是指钢合金钢包含其它元素的数量比这比杂质浓度控制,或者在案件的锰、大于1.5%。UNIT13: 1)Forging means the shaping of metal by a series of hammer blows,or by slow application of pressure.The simplest example is a blacksmith’s forging of a hot piece of metal by hamming the workpiece on an anvil.2)Heavy smith’s forging is fundamentally similar,differing only in the scale of the operation.The workpiece may be an ingot of 100 tons and the deforming force provided by a massive forging hammer,but the whole process is controlled by the master smith,who decedes each time where,and with what force,the blow should take place.3)Forging operations may be carried out using either forging hammers or forging presser With a press,asopposed to a hammer,pressure is slowly applied and plastic deformation tends to occur fairly uniformly throughout the material.4)Forging hammers are of two basic types with the large hammer either dropping on to the workpiece accelerated by gravity alone or,as in the steam hammer,accelerated by both gravity and steam pressure.5)Smith’s or open-die forging is used for making very large forgings or when the number of forgings of a particular design is small.Open-die forging is also used to perform metal prior to find shaping by means of closed-die forging.6)Closed-die forging involves the use of accurately machined die blocks,The capital cost of a pair of die blocks is high, but this is allowable when it is required to make forgings to close dimensional tolerances and in large quality,as would be the case for,say,connecting rods for the engine of a popular car.7)Casting,then,is the process by which molten metal is transformed in one step into a part or component.The part or component produced is called a casting.8)Most cast iron is melted in a cupola.It will melt at a proper temperatue and will be fluid when it is molten 1)形成的金属锻造方法通过一系列的打击,或慢应用的压力。最简单的例子是铁匠的锻造中的一个热点块金属工件的铁砧上理论值。

2)重史密斯的锻造基本上是相似,不同的只在大规模的操作。可能是一个钢锭工件的变形力100吨,由一个巨大的锻锤,但整个过程控制,由主人史密斯,他decedes每次在哪里,用什么力量,打击应该采取的地方。

3)可以实行锻造操作使用的是锻造锤或锻造压与出版社,asopposed到一把锤子,压力是慢慢地应用和塑性变形常发生在相当均匀的物质。

4)锻造锤子的两种基本形式也有大型锤落在工件的加速重力单独或,如在蒸汽锤加速了两个重力和蒸汽压力。

5)史密斯的或开式模锻是用来生产非常大锻件锻造的数量或当某一特定的设计是小的。开式模锻金属也被用来执行之前找到通过伞齿轮完全闭塞式锻造成形。

6)伞齿轮完全闭塞式锻造涉及到使用经过精密机加工模具街区,资本成本一副死块很高,但这是有必要的时候允许使锻件尺寸公差关闭。在大的素质,同时会这样说,连杆为发动机一个受欢迎的汽车。

7)铸造,那麽,这个过程是一个转型的熔融金属步入一个部分或组件。生产部件或组件被称为铸件。

8)最铸铁在冲天炉熔化。它将会融化在适当的temperatue流体时,将是熔化的 UNIT14 Minimum hardness and maximum ductility of steel can be produced by a process called spheroidizing, which causes the iron carbide to form in small spheres or nodules in a ferrite matrix.In order to start with small grains that spheroidize more readily, the process is usually perforated on normalized steel.Several variations of processing are used, but all require the holding of the near the A1 temperature(usually slightly below)for a number of hours to allow the iron carbide to form on its more stable and lower energy state of small, rounded globules.The main need for the process is to improve the machinability quality of high carbon steel and to pretreat hardened steel to help produce greater structural uniformity after quenching.Because of the lengthy treatment time and therefore rather high cost, spheroidizing is not performed nearly as much as annealing or normalizing.硬度最小和最大延性钢可以由一个过程称为球化,使铁碳化物的形成,在小球体在铁素体基体中。为了开始小颗粒更容易,起到球,这个过程通常穿孔在规范化钢。好几个不同的处理都用得上,但是都需要的把持A1附近的温度(通常略低于)的小时数允许铁碳化物形成对其更加稳定和较低的能量状态的小,圆形的小滴。

主要需要过程改善其切削加工性能质量的预处理的高碳钢和淬硬钢的帮助产生更大的结构均匀淬火后。因为冗长的治疗时间,因此相当高成本、球化不执行了将近多达退火或规范。UNIT15 1)In turning the primary motion is provided by the rotation of the workpiece, and in planing it is provided by the translation of the table;in turning the feed motion is a continuous translation of the tool, and in planning it is an intermittent translation of the tool.2)The cutting speed v is the instantaneous velocity of the primary motion of the tool relative to the workpiece(at a selected point on the cutting edge).3)The feed motion f is provided to the tool or the workpiece and, when added to the primary motion, leads to a repeated or continuous chip removal and the creation of the desired machined surface.4)For turning and drilling, the feed f is measured per revolution(mm/rev)of the workpiece or the tool;for planning and shaping f is measured per stoke(mm/stroke)of the tool or the workpiece.5)In turning , with an axial feed, the depth of cut is a direct measure of the decrease in radius of the workpiece and with radial feed the depth of cut is equal to the decrease in the length of workpiece.1)在转弯时的主要运动是由工件的旋转,而在规划是由翻译的桌子上,在转弯时的饲料运动是一个连续的翻译工具,它是一种间歇性规划的翻译工具。

2)切削速度v瞬时速度的主要运动车刀与工件的相对(在选定点的先锋。

3)饲料运动提供工具f或工件,当添加到主要的运动,导致一个重复或连续磨屑清除和创造理想的加工表面。

4)进行车削、钻孔、饲料f是衡量每革命(毫米/启)的工件或工具,为规划和塑造f是衡量每斯托克城(mm /卒中)的工具和工件。

5)在转弯时,轴向喂料,切削深度是一个直接测量半径减少工件和径向喂切削深度等于降低工件的长度

16单元

1)The main factors in chip formaition are: the tool(material and geometry), the work material(material, geometry, and rigidity), and the cutting conditions.2)Discontinuous chips can also be produced under certain conditions with more ductile materials such as steel, causing a rough surface.3)Continuous and long chips may be difficult to handle and, consequently, the tool must be provided with a chip breaker, which curls and breaks the chip into short length.4)This is because the actual shear strain at fracture in the material in the direction of the shear plane, so that the material is removed in fairly small segments.1)在芯片formaition的主要因素是:工具(材料和几何),工作资料(材料、几何、和刚度),和切削条件。2)不连续的芯片生产还可以在一定条件下,有更多的韧性材料,如钢铁,使粗糙的表面。3)连续长芯片可能很难处理,因此,工具必须提供一个芯片断路器,该河并打破芯片短长度。4)这是由于实际剪切应变断裂资料的方向剪切平面,以便材料移到相当小的部分。

第二篇：机械工程专业英语_翻译

spark-igniton engine 电火花式发动机 acceptance sampling 认可采样 accessing 访问 accurate 准确的 acoustic 声学的 actuator 作动器 alternator 交流发动机 analog sensor 模拟传感器

analog-to-digital converter 模数转换器 armature 电枢

Artificial intelligence 人工智能 artificial neural networks 神经网络 as a general rule of thumb 按惯例 assumption 假设

asynchronous AC motors 异步交流电动机asynchronous 不同时的，异步的 bargains 讨价还价 bear on 生成 binomial 二项的 Brake system 制动系统

brushed/brushless motors 有刷/无刷电机 built into 内建

By the same token 出于同样的原因 capacitor Start 电容器启动（电动机）catastrophically 毁灭性地 charging circuit 充电电路 Charging system 供电系统 chassis 车身底盘

compression-ignition engine 压然式发动机 coil high-tension cables 线圈高压电缆 compartment 间隔间，车厢 Compound wound 复励 concerned with 与有关 concise 简洁

conductivity 传导率constant load 定常负载 contracts 合同 Converter 转换器

corporate activities 公司的行为 credited letters 对账单 cylinder 汽缸

data acquisition 数据拾取defectives 缺陷产品 derived from 起源于

destructive inspection 有损检测 Detect 检测

diesel/compression-ignition engine 柴油机 Differential 差速器

dimensions of parts 零件的尺寸 dissipate 耗尽，用完 distribution 分发 distributor 分电器

downgrade to a lower quality level 信用等级下调 dynamic braking 动态制动

Electricalsystem 电气系统electrical equipment 电气装置 electrical schematics 电气原理图 electrical system 供电系统

electromechanical system 机电系统electromechanical 机电的 eliminate 排除 emphasis on 强调 equivalent 相等的 Essential 基本的 establish 建立

expert system 专家系统

fiber-optic sensor 光纤传感器fiber-optic sensors 光纤传感器 Fiber-optic 光纤 field service 现场服务 flaws 有缺点的 flux 通量 flywheel 飞轮

fractional horsepower(rating)小功率电动机 fractional 部分的，分数的 functional 功能的gasoline/spark-ignition engine 汽油机 Gas-turbine engine汽轮机 generate 产生 geographic 地理的Gross domestic product 总产值heat engines 热机 high-tension 高压的 hood（发动机）罩 humidity 湿度 hyperbolic 双曲线的hysteresis motors磁滞式电动机 hysteresis 滞后作用，磁滞式 hysteresis:磁滞现象ignition coil 点火线圈Ignition system点火系统 imbalance 不平衡，不均衡 imperfect 不合格的 impetus 推动，激励 in terms of 根据

increase or decrease the slip speed of the rotor 增减转子的滑动速率

induction motor 感应式电机 induction 电磁感应

information technologies 信息技术 inherent 固有的initial impetus 最初的发展 Inorganic materials 无机材料 inspect 检查

Instrument servo motor 仪表伺服电机 internal combustion engine 内燃机

internal combustion 内燃机 invoices 发票

irreversible 不可逆转的leading power factor 超前功率因数 load torque负载扭矩Logicf unction 逻辑功能 logistic support 后勤保障 log-normal 对数正态的 low-tension 低压的 Magnetic slip 电磁转差率 maintained 保留 makes up for 弥补 manipulate 操纵 marginal cost 边际成本 medium 中间，媒介

mercury thermometer 水银温度计 Missile flight tracking导弹飞性追踪 moment of inertia 转动惯量 monitoring 监视

motor winding电机绕组：

national codes and standards 国标 negotiate 谈判

nondestructive inspection 无损检测 nondestructive 无损检测

Nonmentallicmaterials非金属材料 operating practice 实际操作 permanent magnet 永磁

permanent split capacitor 固定分相的电容器 permeability 渗透性 places the order 下订单 Poisson distributions 泊松分布 Polar inertia极惯性矩poly-phase AC motors 多相交流电动机 polyphase 多相的 Power factor功率因数

Price-performance ratio 性价比 Principal component 主要部件 proximity sensor 接近传感器 purchase order 订单 quality assurance 质量保证 quality in conformance 产品移植性 raw materials 原材料 Rear wheel drive后轮驱动

regenerative braking 再生制动，反馈制动 regenerative 再生的，反馈的reluctance 磁阻repulsion induction 推斥式感应repulsion start 推斥式启动 reversible 可逆的 Rotational speed转速

rotor magnetic field rotate 转子磁场运动 sampling 采样 scheme 安排

schemes 方案 scrapped 抛弃

semi-finished parts 半成品 sensor fusion 传感器融合Series wound串励shaded pole 屏蔽极式 Sheet metal shell金属板壳 Shunt wound并励 Shut-off关断

signs the agreement 签合同 single phase 单相的 smart sensor 智能传感器 somewhat 稍微，有点

sophistication 复杂性，完善化，采用先进技术spark plug cables 火花塞电缆 spark plug 火花塞 specifications 指标

speed transducer 速度传感器 split phase 分相式 squirrel cage 鼠笼式

Starting system 启动系统statistical 统计的 统计学 统计学的 steering systems 方向系统 steering 转向器 stepper motors 步进电机 strain 应变 sufficient 足够的surface treatment 表面处理surroundings 环境

Suspension system悬挂系统 suspension 悬架

switch 开关，转换器synchronous AC motors 同步交流电动机 synchronous 同时的Tactile sensing 触觉传感技术 technique-based decision 技术决策 tends to 倾向于 tenet 原则

tensile tests 拉伸实验 tensile 可拉长的 tensile 张力，拉力

the induction motor operates near the ferquency of the input source：感应式电动机在接近输入电源频率下运行。The internal combustion engine 内燃机 Tolerance levels公差等级 Torque 扭矩

torque-speed curves 转矩-速度曲线 traceability 可描绘

traditional business 传统商务 transmission systems 传动系统 transmission 变速器 trunk deck 行李箱盖

two-value capacitor start 两价电容器启动

ubiquitous 普遍存在的 ultrasonic 超声的，超声波 universal motor 交直流两用电动机 utilize 利用

variability 可变的 可变性 vehicle 车辆

Visual sensing视觉传感技术 voltage regulator 电压调整器 Weight distribution 质量分配 Winding current绕住电流

with the emergence of digital signal processors and microcontrollers 随着数字信号处理器和控制器的出现 wound rotor induction motor绕线转子电动机 wound rotor 绕线转子

第三篇：机械工程专业英语文章翻译

机

械 题目：学号：班级：数控姓名：康振平

工 程 专 业 英 语

Computer-Aided Design and Manufacturing 20110334304 121

Computer-Aided Design and Manufacturing

计算机辅助设计与制造

Computer-aided design（CAD）involves the use of computers to create design drawings and product models.Computer-aided design is usually associated with interactive computer graphics（known as a CAD system）.Computer-aided design systems are powerful tools and are used in the mechanical design and geometric modeling of products and components.计算机辅助设计（CAD）是指用计算机来创造设计图纸和产品模型。计算机辅助设计通常是与交互式计算机图形学（称为CAD系统）有关系的。计算机辅助设计系统是功能强大的工具，被用于在机械设计以及产品和零件的几何建模。

In CAD，the drawing board is replaced by electronic input and output devices.When using a CAD system，the designer can conceptualize the object to be designed more easily on the Graphics screen and can consider alternative designs or modify a particular design quickly to meet the necessary design requirements or changes.The designer can then subject the design to a variety of engineering analyses and can identify potential problems（such as an excessive load or deflection）.The speed and accuracy of such analyses far surpass what is available from traditional methods.在CAD（计算机辅助设计）中，传统的画图板被电子输入和输出设备所替换。当使用CAD系统时，设计者可以使对象概念化以便更容易在图形屏幕上设计，并且可以考虑替代设计或快速地修改一个特定的设计来达到必要的设计要求或变化。因而设计者可以提供多种工程分析并且可以识别潜在的问题（如过负荷或变形）。这些分析的速度和准确性都远远超过了传统的方法。

Draft productivity rises dramatically.When something is drawn once，it never has to be drawn again.it can be retrieved from a library ,and can be duplicated, stretched, sized, and changed in many ways without having to be redrawn。Cut and paste techniques are used as labor-saving aids.设计生产率的提高是显著的。当某些图形被绘制一次后，就没必要再画第二次。它可以从图形库中恢复，可以被复制，拉伸，改变大小，和其他许多方面的改变而无需重新绘制。剪切和粘贴技巧作为节省劳力的助手被使用。

CAD makes possible multiview 2D drawings，and the drawings can be reproduced in different levels of reduction and enlargement.It gives the mechanical engineer the ability to magnify even the smallest of components to ascertain if assembled components fit properly.Parts with different characteristics，such as movable or stationary，can be assigned different colors on the display.CAD使二维图纸多重视图变为可能，并且图形可以在大小不同的图层里重生。它使机械工程师有能力放大甚至最小的部件来确定构件是否装配合适。对于具有不同特性的零部件，如移动或静止，可以指定不同的颜色在显示屏上标示。

have even more freedom with the advent of 3-D parts and manipulate them in endless variations to achieve the desired results.Through finite element analysis，stresses can be applied to be a computer model and the results graphically displayed，giving the designer quick feedback on any inherent problems in a design before the creation of a physical prototype.随着三维建模的出现设计师有了更多自由和无限制的修改它们以实现所期望的结果。通过有限元分析，应力加到计算机模型上并且以图形化的方式显示其结果，在产品物理原型生产之前，对设计中的任何内在问题给设计者一个快速的反馈。Designers In addition to the design’s geometric and dimensional features，other information（such as a list of materials，specification，and manufacturing instructions）is stored in the CAD database.Using such information ,the designer can then analyze the economics of alternative designs.除了设计的几何和尺寸特性之外，其他信息(比如材料清单、规格、和制造说明)都存储在CAD数据库里。利用这些信息，设计师可以分析备选设计的经济性。Computer-aided manufacturing(CAM)involves the uses of computers and computer technology to assist in all the phases of manufacturing a product，including process and production planning，machining，scheduling，management，and quality control.Computer-aided design and computer-aided manufacturing are often combined into CAD/CAM systems.计算机辅助制造(CAM)包括使用计算机和计算机技术来协助制造产品的所有阶段，包括工艺和生产计划，加工，调度，管理，和质量控制。计算机辅助设计和计算机辅助制造常常是和CAD / CAM系统相结合的。

This combination allow the transfer of information from the design stage into the stage of

planning for the manufacture of a product，without the need to reenter the data on part geometry manually.The database developed during CAD is stored； then it is processed further，by CAM，into the necessary data and instructions for operating and controlling production machinery，material-handling equipment，and automated testing and inspection for product quality.这种组合允许一个产品的信息从设计阶段传递到加工规划阶段，而不需要手动重新输入几何部件的数据。计算机辅助设计研发期间存储在数据库，然后通过计算机辅助制造进一步处理，一直到必要的数据和指令的操作和控制生产机械、物料搬运设备，自动化测试和检验产品质量。

In machining operations，an important feature of CAD/CAM is its capability to describe the tool path for various operations，such as NC turning，milling，and drilling.The instructions（programs）are computer generated，and they can be modified by the programmer to optimize the tool path.The engineer or technician can then display and visually check the tool path for possible tool collisions with fixtures or other interferences.The tool path can be modified at any time，to accommodate other part shapes to be machined.在机械加工中，CAD/CAM的一个重要特征是它有可以描述刀具运动轨迹的能力，如数控车削，铣削，钻孔。指令（程序）是计算机生成的，它们可以由程序员修改优化刀具路径。工程师或技术员可以显示和检查刀具路径可能与夹具或其他干扰工具碰撞。刀具路径可以随时修改，以适应其他部分的形状被加工。

Some typical applications of CAD/CAM are：（a）programming for NC，CNC，and industrial robots；（b）design of tools and fixtures and EDM electodes；（c）quality control and inspection，for instance，coordinate-measuring machines programmed on a CAD/CAM workstation；（d）process planning and scheduling ；and（e）plant layout.CAD / CAM的一些典型应用是：（a）数控编程，计算机数控编程和工业机器人；（b）工具和夹具以及电火花电极的设计；（c）质量控制和检查，例如，在CAD / CAM工作站上的坐标测量机编程；（d）工艺规划与调度；和（e）工厂布局。

The emergence of CAD/CAM has had a major impact on manufacturing，by standardizing product development and by reducing design effort，tryout，and prototype work；it has made possible significantly reduced costs and improved productivity.The two-engine Boeing 777 passenger airplane，for example, was designed completed by computer（paperless design）.The plane is constructed directly from the CAD/CAM software developed（an enhanced CATIA system）and no prototypes or mockups were built，such as were required for previous models.CAD/CAM的出现对制造业产生了重大影响，通过产品开发的标准化和减少设计工作量，试用，和原型的工作；它有可能大大降低成本和提高生产力。例如双引擎的波音777客机就是由计算机设计完成（无纸化设计）。这架飞机直接从CAD/CAM软件开发（增强CATIA系统）并没有建立原型或实物模型的情况下制造出来，如以前所需要的的模型。

第四篇：机械工程专业求职信

尊敬的领导：

你好！

很荣幸您能在百忙之中翻阅我的求职信，谢谢！

我是xxxx机械工业学校的机械工程专业的毕业生，真诚希望成为贵公司的一员。

您翻开了这一页，就是为我打开了一扇通往机遇与成功的大门！希望它不同于您手中若干份雷同的求职信，有助于您希望得到的员工。

在校期间，在师友的严格教益及个人的努力下，我具备了扎实的基础知识，系统的掌握了机械制图，AutocAD极限配合与公差技术测量，金属材料与热处理，东工工艺，数控编程，数控工艺，机械基础，电工学，刀具与切削原理，等理论知识熟悉涉外礼仪，同时在课外也学习了许多日常应用软件，不但充实了自己，也培养了自己多方面的技能。更重要的是，严谨的学风和端正的学习态度，塑造了我朴实稳重，创新的性格。

在实践上，我不仅努力学好专业知识，还积极参加各种社会实践活动，抓住了每一个机会，不断锻炼自己。假期时间，去外出打工。在这其中，我深感受到，在竞争中获益非浅，在困难中勇敢面对，在挫折中成长。

在思想上，我思想进步积极向党组织靠拢。品质优秀，诚实守信，待人热情和谐。

在工作上，我在团体协作中有很强的集体荣誉感。我能与大家合作默契，在个人工作中我有很强的责任感，以大局为重。

通过对贵公司的认真了解后，我热爱贵公司所从事的事业，很希望能够在您的领导下，为这一光荣事业添砖加瓦，并且，在实践中不断学习进步。

最后，我郑重提出一个小小要求，无论是否选择我，尊敬的领导希望您能够接受我真诚的谢意，感谢您能在百忙之中所给我的关注！

祝愿贵公司事业蒸蒸日上，屡创佳绩！希望领导能够对我予以考虑，我热切期盼您的回音，谢谢！

此致 敬礼！

第五篇：机械工程专业自荐书

尊敬的领导：

我是一名即将于2001年7月毕业的XX大学XX校区的本科生，所学专业是机电一体化。我仰慕贵单位尊重知识、重视人才之名，希望能成为贵单位一员，为贵单位的事业发展尽我全力。

本人在大学四年中对本专业的知识学得比较扎实，而且还多方涉猎。在计算机方面，除了学DOS、AUTOCAD、FORTRAN、汇编语言外，还参加培训或自学WORD、WINDOWS、FRONTpAGE2000，另外，对CAD/CAM、智能CAD、3DS等有一定的认识。在英语方面，作为外协一员，多次参加外语协会的疯狂英语活动，具有一定的听、说、读、写以及技术资料翻译能力，曾完成5000字以上的机器人专业英语的翻译。另外，在大学伊始本人曾在校编辑部做过一年的学生通讯员，而且，作为邓小平理论研究会的一名会员，参加过多次各种邓研会议，给我的理论修养带来莫大的益处。

诚然，虽然大学四年的学习生活、一定量的社会经历，使我养成了冷静自信的性格和踏实严谨的工作作风，并赋予我参加社会竞争的勇气。然而，所学知识是有限的，大学培养的仅仅是一种思维方式和学习方法，“纸上谈兵终觉浅，绝知此事要躬行”。因此，我将在今后实践中虚心学习，不断钻研，积累工作经验，提高工作能力。久闻贵单位是深值信赖且有发展潜力的单位，神往已久，兹附上简历一份冒昧求职，希望贵单位能给我一个发挥能力的机会。

感谢阅读我的求职信，期待着您的答复。

祝事业兴旺发达！

学生：XXX

20xx年11月1日