机械设计(英文版)全册配套完整教学课件
合集下载
ChainDriveNew 机械设计 英文PPT教案_重大
(Spring Pins)开口销， (Spring U board)弹簧卡片， 多用于大节距链 多用于小节距链 设计时，链节数以取为偶数 (Even)为宜，这样可避免使用过 渡链节(Offset link bar)，因为 过渡链节会使链的承载能力下降。
过渡链节
3.滚子链的规格
标记示例：
08A-1×86
Detachable link chains are fabricated with one-piece elements and can be pressformed from flat rolled steel,
Characters of chain drive
Chordal action (弦切现象或多边形效应)
Speed variation character
由上述分析可知，链传动中，链条的前进速度和上下抖动速 度是周期性变化的，链轮的节距越大，齿数越少，链速的变化就 越大。 当主动链轮匀速转动时，从动链轮的角速度以及链传动的瞬 时传动比都是周期性变化的，因此链传动不宜用于对运动精度有 较高要求的场合。
The distance between flexing joints in roller chain is the pitch(链节距), which is the basic designation for different chain sizes.
2.Joints (联接链节) Axial positioning methods ：
二、上下运动分速度：
v r11 cos r2 cos r2 cos 1 r2 cos 所以链传动瞬时传动比为： i 2 r1 cos
因为从动链轮的角速度为： 2
v r11 cos v r11 sin
2024版机械设计基础PPT全套完整教学课件pptx
人机交互优化
通过改进人机交互方式，提高机械操作的便捷性和舒适性。
未来机械设计的创新点与突破
• 跨领域融合：将不同领域的技术和理念融 入机械设计，创造出更具创新性和实用性 的产品。
未来机械设计的创新点与突破
新材料应用
探索和应用新型材料，提高机械 产品的性能和寿命。
先进制造技术
采用先进的制造技术，如精密加工、 超精密加工等，提高机械制造的精 度和效率。
绿色设计
注重环保和可持续发展，减少资源消耗 和环境污染。
机械设计的发展历程与趋势
集成化设计
实现多学科、多领域的协同设计和优化。
个性化设计
满足用户个性化需求，提供定制化的设计方案。
02
机械零件设计基础
机械零件的分类与功能
传动零件
包括齿轮、带轮、链轮 等，用于传递动力和扭
矩。
轴系零件
连接零件
密封零件
机械制造工艺的优化与改进
工艺优化
通过对现有工艺的改进和优化， 提高产品质量和生产效率，降低
生产成本。
新技术应用
积极引进和应用新技术、新工艺、 新材料等，推动机械制造工艺的 创新和发展。
智能化制造
借助人工智能、大数据等先进技 术，实现机械制造工艺的智能化 和自动化，提高生产效率和果
完成齿轮减速器的三维模型设 计、二维工程图绘制及装配图
等。
案例二：轴承座的设计
设计背景
轴承座是支撑轴承并传递载荷的重要部件， 广泛应用于各种机械设备中。
设计步骤
确定轴承类型、选择轴承座结构形式、计算 轴承座尺寸、校核轴承座强度等。
设计目标
实现支撑轴承、传递载荷、保证轴的旋转精 度等功能。
机械设计的发展趋势与挑战
机械设计全册配套完整教学课件
脆性材料极限应力： （强度极限） 1、单向应力状态
强度条件：
或
或
19
2、复合应力下工作的零件
按第一强度条件： （最大主应力理论）
一般工作期内应力变化次数<103（104）按 静应力强度计算
20
§2-3 机械零件的疲劳强度计算
一、变应力作用下机械零件的失效特征
1、失效形式：疲劳（破坏）（断裂） 2、疲劳破坏特征：
二、机械设计的一般程序 1、机器设计的一般程序
市场调 研
可行性 研究
设 计 任 务 书
原理 方案 设计
技术 设计
试制 试验
定
装配图、 样
出
零件图、 机
最
技术文
评
佳
件
价
方
改
案
进
小批生 投 产试销 产
考核
产
工艺
品
性收
销
集用
售
户意
见
2、机械零件设计的一般步骤
1）建立零件的受力模型，确定零件的计算载荷 Pca KP 2）选择零件的类型与结构 3）选择零件的材料 4）按可能的失效形式确定零件的计算准则，并确定零件的
工作能力——零件不发生失效时的安全工作限度
计算准则——以防止产生各种可能失效为目的而拟定的零件 工作能力计算依据的基本原则
1、强度准则
零件在载荷作用下抵抗破坏的能力
2、刚度准则
[ ] lim
S
[ ] lim
St
lim
(
lim
)
B S
( (
B S
) )
脆性材料 塑性材料
Y (Y ) 疲劳极限
17
§ 2—2 静应力时机械零件的强度计算 一、单向应力下的塑性零件
电子教案与课件：机械设计制造及其自动化专业英语第四版课件1
最终部件的性能（硬度、强度和及加工性能）决 定选材，而非锻造所要求的性能（决定）。
4. Low-carbon, nickel-chromium steel is just about as plastic at high temperature under a single 520-ft.lb blow as plain steels of similar carbon content.
低碳镍铬钢与同等碳含量的普通碳钢在高温下经 历520-ft.lb锻打时的塑性差不多。
20
5. Nickel decreases forgability of medium-carbon steel, but has little effect on low-carbon steels.
镍降低中碳钢的可锻性，但对低碳钢没什么影响。 6. Chromium seems to harden steel at forging
机械设计制造及其自动化专业英语（第四版） 长难句分析（PART I）
1
Unit 1 Metals
1. Of the roughly 100 basic elements of which all matter is composed, about half are classified as metals.
5
表示分类的常用句型ቤተ መጻሕፍቲ ባይዱ
1．用主动态“fall into”表示 例句：Forces fall into two classes. 2．用被动式表示
divided
can
may
might
be
c las s ified c ategorized grouped
into（或as或in）
4. Low-carbon, nickel-chromium steel is just about as plastic at high temperature under a single 520-ft.lb blow as plain steels of similar carbon content.
低碳镍铬钢与同等碳含量的普通碳钢在高温下经 历520-ft.lb锻打时的塑性差不多。
20
5. Nickel decreases forgability of medium-carbon steel, but has little effect on low-carbon steels.
镍降低中碳钢的可锻性，但对低碳钢没什么影响。 6. Chromium seems to harden steel at forging
机械设计制造及其自动化专业英语（第四版） 长难句分析（PART I）
1
Unit 1 Metals
1. Of the roughly 100 basic elements of which all matter is composed, about half are classified as metals.
5
表示分类的常用句型ቤተ መጻሕፍቲ ባይዱ
1．用主动态“fall into”表示 例句：Forces fall into two classes. 2．用被动式表示
divided
can
may
might
be
c las s ified c ategorized grouped
into（或as或in）
机械专业英语完整7PPT课件
工程材料和应用材料的系统工程设计最初都会涉及材 料的墨菲法则和材料应用法则。
可编辑课件
3
Murphy’s Law: If any material can fail, it will.
Laws of materials applications
(1) All materials are unstable.
Materials are the reality in a design.
如果现存的材料不具备必要的性能，或者只有新材料 开发出来才能制造，在设计仿真阶段就必须改动这些 材料的技术要求。在设计中材料是现实的。
可编辑课件
13
Paragraph 5
Figure 1 illustrates a simple schematic representation of a design process that includes design implementation.
除非开发出新的材料，否则由于材料不具有必要的性 能而不能实现的设计只能是一个永远不能成为现实的 概念。
可编辑课件
11
Prior to a fabrication step, materials specifications must be made depending upon the design requirements.
计算机辅助设计现在已用于设计过程，各种设计和设 计思想能被检验和仿真。
可编辑课件
10
Paragraph 4:
Even in the early design cycle, it is useful to have some concept of available materials.
即使在早期的设计循环中，具有一些材料的概念也是 有用的。
可编辑课件
3
Murphy’s Law: If any material can fail, it will.
Laws of materials applications
(1) All materials are unstable.
Materials are the reality in a design.
如果现存的材料不具备必要的性能，或者只有新材料 开发出来才能制造，在设计仿真阶段就必须改动这些 材料的技术要求。在设计中材料是现实的。
可编辑课件
13
Paragraph 5
Figure 1 illustrates a simple schematic representation of a design process that includes design implementation.
除非开发出新的材料，否则由于材料不具有必要的性 能而不能实现的设计只能是一个永远不能成为现实的 概念。
可编辑课件
11
Prior to a fabrication step, materials specifications must be made depending upon the design requirements.
计算机辅助设计现在已用于设计过程，各种设计和设 计思想能被检验和仿真。
可编辑课件
10
Paragraph 4:
Even in the early design cycle, it is useful to have some concept of available materials.
即使在早期的设计循环中，具有一些材料的概念也是 有用的。
Chapter01 Introduction 机械零件设计英文PPT全套教案
Non-engineering decisions: cost, marketability, product liability, ethics, politics, etc.
Fundamental Design Considerations
1 Strength 4 Corrosion 7 Processing 10 Safety 13 Styling 16 Flexibility 19 Surface finish 22 Volume
Energy absorber: brakes and dampers Supporting elements: shafts, springs, seals Connection and joints: thread fasteners, keys,
couplings
2. Machine Design — A Discipline-blending Human Endeavor
(detail design) 4) Production drawings… 5) Evaluation and presentation
Two Approaches of Machine Design
Conceptual design of configuration
1) Suggest feasible configurations and alternatives 2) Analyse and synthesize them by decomposing the
Master the basic knowledge, methods and procedures and gain the competence in applying them into practical design.
Fundamental Design Considerations
1 Strength 4 Corrosion 7 Processing 10 Safety 13 Styling 16 Flexibility 19 Surface finish 22 Volume
Energy absorber: brakes and dampers Supporting elements: shafts, springs, seals Connection and joints: thread fasteners, keys,
couplings
2. Machine Design — A Discipline-blending Human Endeavor
(detail design) 4) Production drawings… 5) Evaluation and presentation
Two Approaches of Machine Design
Conceptual design of configuration
1) Suggest feasible configurations and alternatives 2) Analyse and synthesize them by decomposing the
Master the basic knowledge, methods and procedures and gain the competence in applying them into practical design.
Chapter-Introduction-机械零件设计英文全套教案课件 (一)
Chapter-Introduction-机械零件设计英文全套教案课件 (一)Chapter-Introduction-机械零件设计英文全套教案课件IntroductionMachine parts are the foundation of mechanical design and form the basis of all mechanical processes. The efficiency and effectiveness of any mechanical system depend largely on the quality and precision of the machine parts used. This course highlights the importance of machine parts and therole they play in mechanical design.The goal of this course is to equip students with the necessary knowledge and skills to design and produce machine parts that meet specific requirements. It covers everything from basic concepts and principles to advanced techniques and tools, giving students a comprehensive understanding of machine part design.The course is divided into several sections which include:1. Basic Machine Part Design Principles - a comprehensive overview of the basic principles that govern machine part design.2. Material Selection- the process of selecting the right materials for machine part design based on their mechanicalproperties, environmental considerations, and economic feasibility.3. Design for Manufacture - the role of design in determining the ease of manufacture and the cost-effectiveness of machine parts.4. Tolerance and Dimensioning - the importance of tolerance and dimensioning in machine part design, including an in-depth discussion of geometric dimensioning and tolerancing (GD&T) principles.5. Machining Techniques - an overview of different machining techniques used in the production of machine parts, including milling, turning, grinding, and EDM.6. Assembly and Integration - the process of integrating machine parts into a complete mechanical system, including an overview of assembly techniques and considerations for integration.By the end of the course, students will have a solid understanding of the fundamental concepts and principles of machine part design. They will also be familiar with advanced techniques and tools used in machine part design and will have hands-on experience in producing machine parts.This course is suitable for mechanical engineering students, design engineers, and anyone interested in machine part design. The course is structured in a way that allows learners to study at their own pace, with plenty of examplesand exercises to help reinforce the concepts covered.Overall, the course aims to equip learners with the knowledge and skills necessary to produce high-quality, precision machine parts that are critical to the success of any mechanical system.。
Gears 机械设计 英文PPT教案_重大
目的：储藏润滑油， 补偿齿轮传动受力后 的弹性变形及热膨胀， 以及元件制造及装配 误差
确定方法：固定中心 距极限偏差的情况下， 通过改变齿厚偏差的 大小而获得不同的最 小侧隙．类比法设计 或根据设计手册
jbm n i n 3 2 0.0 60.00ai0 0.5 0m 3 n
Failure of gears
Gears Lubrication of gears
V<12m/s
Other lubrication methods
1. Grease lubrication 2. Solid lubrication
V>12m/s
单位长度名义载荷： wmFnLFt Lcosຫໍສະໝຸດ 计算载荷：wKwm
对接触强度计算 对弯曲强度计算
影响动载荷系数的主要因素有： 1) 由基节和齿形偏差产生的传动误差； 2) 齿轮的节圆速度； 3) 转动件的转动惯量和刚度； 4) 轮齿载荷； 5) 在啮合循环中轮齿啮合刚度的变化。 6) 磨合效果、润滑油特性、轴承及箱体支承刚度以及动平衡精
度等
齿向载荷分布系数 K
齿向载荷分布系数 是考虑轮齿工作时沿齿宽方向载荷 分布不均对齿面接触应力和齿根弯曲应力影响的系数
Spur Gear Design
What we will learn in this chapter:
1. Elementary design parameters of gears 2. Failure types of gears 3. Material selection of gear 4. Lubrication of gears 5. Bending strength of gear teeth 6. Contact strength of gear teeth
确定方法：固定中心 距极限偏差的情况下， 通过改变齿厚偏差的 大小而获得不同的最 小侧隙．类比法设计 或根据设计手册
jbm n i n 3 2 0.0 60.00ai0 0.5 0m 3 n
Failure of gears
Gears Lubrication of gears
V<12m/s
Other lubrication methods
1. Grease lubrication 2. Solid lubrication
V>12m/s
单位长度名义载荷： wmFnLFt Lcosຫໍສະໝຸດ 计算载荷：wKwm
对接触强度计算 对弯曲强度计算
影响动载荷系数的主要因素有： 1) 由基节和齿形偏差产生的传动误差； 2) 齿轮的节圆速度； 3) 转动件的转动惯量和刚度； 4) 轮齿载荷； 5) 在啮合循环中轮齿啮合刚度的变化。 6) 磨合效果、润滑油特性、轴承及箱体支承刚度以及动平衡精
度等
齿向载荷分布系数 K
齿向载荷分布系数 是考虑轮齿工作时沿齿宽方向载荷 分布不均对齿面接触应力和齿根弯曲应力影响的系数
Spur Gear Design
What we will learn in this chapter:
1. Elementary design parameters of gears 2. Failure types of gears 3. Material selection of gear 4. Lubrication of gears 5. Bending strength of gear teeth 6. Contact strength of gear teeth
机械工程专业英语PPT课件
Bearing
A device that supports, guides, and reduces the friction of
motion between fixed and moving machine parts. 轴承：在机器的固定和运动部件之间起支撑、引导和减 少运动摩擦的装置。
15
2020/4/26
Lesson 1 Basic Concept in Mechanics
Terminology 术语,专有名词
[,tə:mi'nɔlədʒi]
Text tour
2020/4/26
13
《机械工程专业英语教程》
Terminology
Gear 齿轮, 传动装置
1.A toothed machine part, that meshes with another toothed part to transmit motion or to change speed or direction. 齿轮：有齿的机器零件，与另一个有齿零件相啮合，从而传 递运动或者改变运动的方向或速度。
唐一平主编：《先进制造技术》北京：机械工业出 版社，2004；
王慧莉，贾卫国编《国际学术交流英语》大连：大 连理工大学出版社，2005
主要教学内容
Lesson 1 Basic Concept in Mechanics Lesson 2 Forces and Their Effects Lesson 3 Overview of Engineering Mechanics Lesson 4 Shafts and Couplings Lesson 5 Shafts and Associated Parts Lesson 6 Belts, Clutches, Brakes, and Chains Lesson 7 Fasteners and Springs Lesson 14 Physical Properties of Materials Lesson 29 Tolerances and Surface Roughness Lesson 35 Coordinate Measuring Machine Lesson 36 Lathes
机械专业英语完整10ppt课件
精选课件
2
Recognize Lathe
精选课件
3
Paragraph 1
Lathes are widely used in industry to produce all kind of machined parts.
Some are general-purpose(通用的) machines, and others are used to perform highly specialized operations.
刀具安装在转塔的六个边上。每一把刀具的（伸出） 长度也可以调整，因此，所有刀具可以很方便地、准 确地转到需要的位置。
精选课件
11
Those cutting tools can, therefore be employed successively(依次地) without the need for dismounting the tool and mounting a new one each time, as the case with conventional engine lathe.
精选课件
8
Works such as motor shafts, spindles, pistons, rods, car axles, turbine shafts, and a variety of other objects can be turned using this type of lathe.
精选课件
18
The machining operations are done by cutting tools mounted on the turret and on the cross slide.
机械设计制造及其自动化专业英语UnitMechanicalPropertiesofMaterialsPPT课件
• 在这个区域中，金属遵守胡克定律—阐述了 在加载的弹性范围内，应力和应变成比例关 系（材料在卸载后，能够完全回复它原来的 尺寸）。
精品课件 14
Mechanical properties
• In the actual plotting of the curve, the proportionality limit is obtained at a slightly lower value of the load than the elastic limit.
• torsion n. 扭转；转矩 [ˈtɔ:rʃən]
• impact n. 冲击；冲力；影响 [ˈɪmpækt]
• fatigue n. 疲劳 [fəˈti:ɡ]
• creep n. 蠕变 [kri:p]
•
specimen
n.
试件；试样 精品课件
[ˈspesimin]
1
Mechanical Properties of Materials
• Physical properties
Density or specific gravity, moisture [ˈmɔɪstʃə] content, etc., can be classified under this category [ˈkætəgɔ:ri].
• 材料特性主要分为三类：(i)物理特性，(ii)化学 特性，(iii)力学性或碱性，活性和腐蚀性。
精品课件 4
Chemical properties
• The most important of these is corrosion which can be explained in layman’s [ˈlemən] terms as the resistance of the material to decay [dɪˈke] while in continuous use in a particular atmosphere.
精品课件 14
Mechanical properties
• In the actual plotting of the curve, the proportionality limit is obtained at a slightly lower value of the load than the elastic limit.
• torsion n. 扭转；转矩 [ˈtɔ:rʃən]
• impact n. 冲击；冲力；影响 [ˈɪmpækt]
• fatigue n. 疲劳 [fəˈti:ɡ]
• creep n. 蠕变 [kri:p]
•
specimen
n.
试件；试样 精品课件
[ˈspesimin]
1
Mechanical Properties of Materials
• Physical properties
Density or specific gravity, moisture [ˈmɔɪstʃə] content, etc., can be classified under this category [ˈkætəgɔ:ri].
• 材料特性主要分为三类：(i)物理特性，(ii)化学 特性，(iii)力学性或碱性，活性和腐蚀性。
精品课件 4
Chemical properties
• The most important of these is corrosion which can be explained in layman’s [ˈlemən] terms as the resistance of the material to decay [dɪˈke] while in continuous use in a particular atmosphere.
- 1、下载文档前请自行甄别文档内容的完整性，平台不提供额外的编辑、内容补充、找答案等附加服务。
- 2、"仅部分预览"的文档,不可在线预览部分如存在完整性等问题,可反馈申请退款(可完整预览的文档不适用该条件!)。
- 3、如文档侵犯您的权益，请联系客服反馈,我们会尽快为您处理(人工客服工作时间：9:00-18:30)。
For the convenience of kinematic or dynamic analysis of a machine, a machine can be decomposed into mechanisms.
3) Classification of Machine Elements
Energy absorber: brakes 制动器and dampers减震器 Supporting elements: shafts, springs弹簧, seals密封 Connection and joints: thread fasteners螺纹紧固件,
keys键, couplings联轴器
2) Composition of Machine
In terms of basic manufacturing unit, a machine is composed by machine elements/components.
In terms of the functions of the sub-system of a machine, it is comprised of the source-power, transmission, execution and control/manipulation parts.
belt) 汽车发动机（多楔带）
Machine design is the fundamental practice in engineering; is the transformation of concepts and ideas into useful machinery.
Machine design is the application of science and technology to devise new or improved products for the purpose of satisfying human needs.
机械设计(英文版）全册 配套完整教学课件
பைடு நூலகம்
Design of Machine Elements
Chapter 1 Introduction
The Meaning of Design
Engineering Mechanical Engineering
Design Machine design
“Engineering” is the art of directing the great sources of power in nature for the use and convenience of human beings / utilizing the existing resources and natural law to benefit humanity
1) Definition of Machine
A machine is a combination of mechanisms and other components that transforms, transmits, or uses energy, load, or motion for a specific purpose.
Waterwheel of Yellow River
Potential energy to kinetic energy
Diesel generator
Compression stroke压缩冲程(机械能-热 能)
Power stroke做功冲程(化学能-机械能)
Design requires significant creativity, practice, and vision to be done well.
Engineering is concerned with the conversion of energy from one form to another with the objective of extracting useful work.
Mechanical engineering has the more specific objective of designing machinery to this purpose in the most suitable manner possible.
sliding bearings
rolling-element bearings
Offshore drilling platform
Wheel shaft of locomotive
chain drives链传动
Application
Belt drive带传动
Automobile engine (multi wedge
Design problems are, almost without exception, openended problems combining hard science and creativity.
1. About Machine
Definition of Machine Composition
Normal load transmitter: sliding bearings滑动轴承, rolling-element bearings滚动轴承
Torque transmitter: gears, traction drives牵引传动, chain drives链传动, belt drives带传动, power screws 螺纹连接
A machine is a combination of components which can transmit power in a controlled manner by converting energy from one form to another and eventually producing useful work.
3) Classification of Machine Elements
Energy absorber: brakes 制动器and dampers减震器 Supporting elements: shafts, springs弹簧, seals密封 Connection and joints: thread fasteners螺纹紧固件,
keys键, couplings联轴器
2) Composition of Machine
In terms of basic manufacturing unit, a machine is composed by machine elements/components.
In terms of the functions of the sub-system of a machine, it is comprised of the source-power, transmission, execution and control/manipulation parts.
belt) 汽车发动机（多楔带）
Machine design is the fundamental practice in engineering; is the transformation of concepts and ideas into useful machinery.
Machine design is the application of science and technology to devise new or improved products for the purpose of satisfying human needs.
机械设计(英文版）全册 配套完整教学课件
பைடு நூலகம்
Design of Machine Elements
Chapter 1 Introduction
The Meaning of Design
Engineering Mechanical Engineering
Design Machine design
“Engineering” is the art of directing the great sources of power in nature for the use and convenience of human beings / utilizing the existing resources and natural law to benefit humanity
1) Definition of Machine
A machine is a combination of mechanisms and other components that transforms, transmits, or uses energy, load, or motion for a specific purpose.
Waterwheel of Yellow River
Potential energy to kinetic energy
Diesel generator
Compression stroke压缩冲程(机械能-热 能)
Power stroke做功冲程(化学能-机械能)
Design requires significant creativity, practice, and vision to be done well.
Engineering is concerned with the conversion of energy from one form to another with the objective of extracting useful work.
Mechanical engineering has the more specific objective of designing machinery to this purpose in the most suitable manner possible.
sliding bearings
rolling-element bearings
Offshore drilling platform
Wheel shaft of locomotive
chain drives链传动
Application
Belt drive带传动
Automobile engine (multi wedge
Design problems are, almost without exception, openended problems combining hard science and creativity.
1. About Machine
Definition of Machine Composition
Normal load transmitter: sliding bearings滑动轴承, rolling-element bearings滚动轴承
Torque transmitter: gears, traction drives牵引传动, chain drives链传动, belt drives带传动, power screws 螺纹连接
A machine is a combination of components which can transmit power in a controlled manner by converting energy from one form to another and eventually producing useful work.