机械工程专业英语介绍PPT课件下载

这是一个关于机械工程专业英语介绍PPT课件，主要介绍研究产品的尺寸、形状和详细结构的基本构思，还要研究产品在制造、销售和使用等方面的问题。现代技术对零件尺寸精度的要求越来越严格。而且，目前许多零部件是由散步在各地的不同厂家生产的，因此必须对这些零件的尺寸和生产作出严格的规定，以保证它们具有互换性。在不影响零件性能的情况下，应当给尺寸尽可能大的公差，以把生产成本降至最低。制造成本会随着公差的降低而升高。9 Introduction to Mechanical Design Tolerance，公差 Basic size 基本尺寸 Actual size 实际尺寸 Deviation 偏差 Upper deviation 上偏差 Lower deviation 下偏差 Tolerance symbols 公差符号 Roughness 粗糙度，欢迎点击下载机械工程专业英语介绍PPT课件哦。

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TECHNICAL ENGLISH MECHANICAL ENGINEERING YAN NU 9. Introduction to Mechanical Design 9 Introduction to Mechanical Design Bug ： A defect in a system or design 9 Introduction to Mechanical Design Mechanical design is the application of science and technology to devise new or improved products for the purpose of satisfying human needs. It is a vast field of engineering technology which not only concerns itself with the original conception of the product in terms of its size， shape and construction details， but also considers the various factors involved in the manufacture， marketing and use of the product. 9 Introduction to Mechanical Design Mechanical design is the application of science and technology to devise new or improved products for the purpose of satisfying human needs. It is a vast field of engineering technology which not only concerns itself with the original conception of the product in terms of its size， shape and construction details， but also considers the various factors involved in the manufacture， marketing and use of the product. 9 Introduction to Mechanical Design Mechanical design should be considered to be an opportunity to use innovative talents to envision a design of a product， to analyze the system and then make sound judgments on how the product is to be manufactured. It is important to understand the fundamentals of engineering rather than memorize mere facts and equations. There are no facts or equations which alone can be used to provide all the correct decisions required to produce a good design. 9 Introduction to Mechanical Design Mechanical design should be considered to be an opportunity to use innovative talents to envision a design of a product， to analyze the system and then make sound judgments on how the product is to be manufactured. It is important to understand the fundamentals of engineering rather than memorize mere facts and equations. There are no facts or equations which alone can be used to provide all the correct decisions required to produce a good design. 9 Introduction to Mechanical Design During the beginning stages of design， creativity should be allowed to flourish without a great number of constraints. Even though many impractical ideas may arise， it is usually easy to eliminate them in the early stages of design before firm details are required by manufacturing. In this way， innovative ideas are not inhibited. Quite often， more than one design is developed， up to the point where they can be compared against each other. 9 Introduction to Mechanical Design 在设计的初始阶段，应该允许设计人员充分发挥创造性，不受各种约束。即使产生了许多不切合实际的想法，也会在设计的早期，即绘制生产图纸之前被改正掉。只有这样，才不至于堵塞创新的思路。通常要提出几套设计方案，然后加以比较。 9 Introduction to Mechanical Design Another important point which should be recognized is that a design engineer must be able to communicate ideas to other people if they are to be incorporated. Communicating the design to others is the final， vital step in the design process. Undoubtedly many great designs， inventions， and creative works have been lost to mankind simply because the originators were unable or unwilling to explain their accomplishments to others. 9 Introduction to Mechanical Design Another important point which should be recognized is that a design engineer must be able to communicate ideas to other people if they are to be incorporated. Communicating the design to others is the final， vital step in the design process. Undoubtedly many great designs， inventions， and creative works have been lost to mankind simply because the originators were unable or unwilling to explain their accomplishments to others. 9 Introduction to Mechanical Design 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. 9 Introduction to Mechanical Design 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. 9 Introduction to Mechanical Design Translation exercise: Today’s technology requires that parts be specified with increasingly exact dimensions(尺寸）. Many parts made by different companies at widely separated locations must be interchangeable， which requires precise size specifications production. 现代技术对零件尺寸精度的要求越来越严格。而且，目前许多零部件是由散步在各地的不同厂家生产的，因此必须对这些零件的尺寸和生产作出严格的规定，以保证它们具有互换性。 9 Introduction to Mechanical Design The technique of dimensioning parts within a required range of variation to ensure interchangeable is called tolerancing. Each dimension is allowed a certain degree of variation within a specified zone， or tolerance. For example， a part’ dimension might be expressed as 20±0.50， which allows a tolerance (variation in size) of 1.00 mm. 给零件标注尺寸使其在一个规定的区间内变动，以保证它们具有互换性的技术称为公差技术。允许每个尺寸在规定范围内具有一定的变动量，称为公差。例如，一个零件的尺寸可以被表示成20±0.50，其公差（尺寸变动量）为1.00 mm。 9 Introduction to Mechanical Design A tolerance should be as large as possible without interfering with the function of the part to minimize production costs. Manufacturing costs increase as tolerance become smaller. 在不影响零件性能的情况下，应当给尺寸尽可能大的公差，以把生产成本降至最低。制造成本会随着公差的降低而升高。 9 Introduction to Mechanical Design Tolerance， 公差 Basic size 基本尺寸 Actual size 实际尺寸 Deviation 偏差 Upper deviation 上偏差 Lower deviation 下偏差 Tolerance symbols 公差符号 Roughness 粗糙度lLq红软基地

机械工程专业英语翻译PPT课件：这是一个关于机械工程专业英语翻译PPT课件，主要介绍机械工程的专业英语的相关内容。机械工程 专业英语课程介绍学习专业英语的重要性学习目的为何在大三开设这门课程专业英语的英文名称“专业英语”----- English for Special Purpose Specified English for ……. “机械工程专业英语” Specified English for Mechanical Engineering 专业英语和普通英语的区别 一. 词义特点 1. 根据词类辨明词义 e.g: (1) Round (adj.) surface reflector is a key unit for the solar energy device. 曲面反射器是太阳能装置的关键元件。 ( 2) This is the whole round (n.) of knowledge. 这是全部知识范围。 2. 区分场合确定词义（不同的场合，词义也不一样。要根据 上下文和语言环境来确定词义） e.g: (1) pig: 猪 ~ iron 生铁 (机械专业) ~ metal 金属锭 ~ copper 生铜 (2) dog: 狗 (机械专业) ~ 鸡心夹头, 挡块 3. 按照习惯搭配词义 e.g: (1) I have a short memory. (2) This biscuit eats short. (3) Indeed he has a short temper. 4. 联系上下文活用词义 e.g: (1) There is no physical contact between tool and workpiece. 工具和工件之间没有有形（直接）的接触。 (2) High-speed grinding does not know this disadvantage 高速磨削不知道（存在）这个缺点，欢迎点击下载机械工程专业英语翻译PPT课件哦。

机械工程专业描述PPT课件：这是一个关于机械工程专业描述PPT课件，主要介绍现代机械设计理论与方法、机械系统动力学、机电一体化系统设计、第二模块：数控技术、先进制造技术、精密与特种加工、第三模块：机电传动控制、状态监测与故障诊断、可编程控制技术。课程模块第一模块：现代机械设计理论与方法、机械系统动力学、机电一体化系统设计第二模块：数控技术、先进制造技术、精密与特种加工第三模块：机电传动控制、状态监测与故障诊断、可编程控制技术第四模块：发动机原理、工程车辆设计、车辆构造第五模块：测控电路、自动控制元件、测控仪器设计研讨课：煤矿综采自动、机械创新设计、液压传动系统、机电设备管理双语课： Foundation of Mechanical Engineering and Automation(机械工程及自动化基础) Introduction of MEMS Technology(MEMS微机电系统技术概论) Contemporary integrated manufacturing system(现代集成制造系统) The Technology of Robot(机器人技术) 现代机械设计理论与方法先修课程：高等数学、概率论与数理统计、机械制图、工程力学、机械原理、机械设计内容简介：本课讲述现代机械设计的基本概念、思想和方法，并通过实例说明现代设计的具体应用。其主要内容包括目前国际最流行的创新设计、绿色设计、稳健设计、并行设计、反求工程设计、动态分析设计等现代设计方法；和现已普及应用的优化设计、有限元设计、可靠性设计等现代设计方法。对优化设计、有限元设计、可靠性设计等成熟理论和方法作重点介绍。机械系统动力学先修课程：高等数学，机械制图，理论力学，材料力学，机械原理，机械设计，计算机语言内容简介：机械系统动力学是机械动力类专业的专业选修课程，本课程的任务是使学生获得机械系统动力学的基本理论与基本方法，目的在于培养学生研究机械系统中回转构件的扭转振动与临界转速，杆的纵向振动，刚性转子弹性支承的动力学分析，计入转轴激励的双圆盘系统动力学，弦的横向自由振动，齿轮系统的振动与固有频率，凸轮机构的动力学。机电一体化系统设计先修课程：机械原理、机械设计、电工技术与电子技术、测试技术、控制工程基础、单片微机原理与接口技术等内容简介：本课程是机械设计及其自动化专业方向的专业核心课程，欢迎点击下载机械工程专业描述PPT课件哦。

机械工程专业介绍PPT课件：这是一个关于机械工程专业介绍PPT课件，主要介绍机械工程是以有关的自然科学和技术科学为理论基础，结合生产实践中的技术经验，研究和解决在开发、设计、制造、安装、运用和修理各种机械中的全部理论和实际问题的应用学科。机械工程 1、什么是机械工程？ 机械工程是以有关的自然科学和技术科学为理论基础，结合生产实践中的技术经验，研究和解决在开发、设计、制造、安装、运用和修理各种机械中的全部理论和实际问题的应用学科。 2、机械工程的发展史 2、机械工程的发展史 公元前三~四千年左右，人类发现金属，学会熔炼，制造出任意形状的青铜工具。 2、机械工程的发展史近代：工业革命 1）从手动到自动 ①1733年约翰·凯伊的飞梭 2、机械工程的发展史 ②1738年怀特·鲍尔的滚筒 2、机械工程的发展史 ③卡特赖托的动力纺织机 1786年，改进后，成功使各种动作实现了自动化，如穿梭、综 絖（为制道梭道使经线向上的用具）举起，停止纬线的方向、卷经线、取下织成的织物、经线上浆等。 2、机械工程的发展史 ④从大气压的发现到蒸汽机的完成 瓦特的蒸汽机 2、机械工程的发展史 2、机械工程的发展史 ⑤机床的问世 2、机械工程的发展史 2、机械工程的发展史 ⑥开始了钢铁时代 2、机械工程的发展史 ⑦动力的发展与进步 蒸汽机车 2、机械工程的发展史 汽轮机、水轮机 2、机械工程的发展史戴姆勒28岁以前一直在学习机械方面的理论和实践知识，1872年进入奥托公司工作，1882年，他辞掉了工作，和迈巴赫共同在堪休塔特建立了汽车试验厂。戴姆勒在工厂开始了研究，首先发明了汽油的发动机。发明白热管点火法，制造出900r/min的内燃机，欢迎点击下载机械工程专业介绍PPT课件哦。