机械专业英语课件
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《机械类专业英语》课件
Skimming
This skill allows readers to quickly scan through the text to get a general understanding of the content It is often used to identify key information or main ideas
Learning significance and purpose
Learning significance and purpose
Learning significance: Mastering mechanical English is of great significance for enhancing personal competitiveness, broadening international perspectives, and promoting academic exchanges.
PPT courseware for Mechanical Professional English
• Introduction to Mechanical Professional English
• Mechanical English Vocabulary • Mechanical English Reading and
Outline
Skimming through the text to identify key information or ideas and creating an outline to organize them This helps readers understand the structure of the article and how different ideas are connected
This skill allows readers to quickly scan through the text to get a general understanding of the content It is often used to identify key information or main ideas
Learning significance and purpose
Learning significance and purpose
Learning significance: Mastering mechanical English is of great significance for enhancing personal competitiveness, broadening international perspectives, and promoting academic exchanges.
PPT courseware for Mechanical Professional English
• Introduction to Mechanical Professional English
• Mechanical English Vocabulary • Mechanical English Reading and
Outline
Skimming through the text to identify key information or ideas and creating an outline to organize them This helps readers understand the structure of the article and how different ideas are connected
机械类专业英语ppt课件
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14
❖ cumulative ['kjuːmjʊlətɪv]
❖ adj. 累积的
❖ cumulative error 累积误差 ; 积累误差 ; 累积差误 ❖ cumulative frequencies 累积频数 ; 累计频数 ❖ cumulative learning 累积学习
❖ dimensionless
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❖ uniaxial ❖ adj. 单轴（向）的，同轴的
念 ; 压力集中 ❖ axial stress 轴向应力 ; 轴应力 ; 多轴向应力 ❖ ; 热应力试验 ❖ stress corrosion 应力腐蚀 ; 超应力腐蚀 ; 应力腐化 ; 应 ❖ Stress ball 压力球 ; 减压球 ; 美国原装 ; 握力球 ❖ stress amplitude 应力幅 ; 应力幅值 ; 应力幅度 ; 应力振幅
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15
❖ quantity
❖ n. 参数，值；数量；总量
❖ physical quantity 物理量 ; 物理量 ; 实物量 ; 要的实物量 ❖ dimensionless quantity 无量纲量 ; 无因次量 ; 无因次值 ❖ average quantity 平均数量 ; 平均量 ; 均匀数量 ; 均匀数目 ❖ additional quantity 追加数量 ; 额外数量 ; 附加量 ❖ considerable quantity 大数量 ; 可观的
❖ magnitude
❖ n. 数量、数值；大小；量级
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10
❖ equilibrium ❖ n. 平衡；稳定；保持平衡的能力
❖ [,iːkwɪ'lɪbrɪəm]
机械专业英语课件 PPT
1.There are two kinds of gun drills, namely, the center-cut gun drill used for drilling blind holes and the trepanning drill.
深孔钻分为两种，即用于钻削盲孔的中心钻和套孔 钻。
另一方面，直柄钻被固定到钻夹中，同理， 钻夹以与锥柄钻相同的方式固定到主轴孔中。
Paragraph 5
1.Twist drills are usually made of high-speed steel, although carbide-tipped drills are also available. The size of twist drills used in industrial range from 0.01 up to 3.25 in. (i.e., 0.25 up to 80 mm).
钻是利用绕轴旋转的钻头在工件上生成通孔或盲 孔的加工工艺。
2.Consequently, the range of cutting from that axis of rotation is equal to the radius of required hole.
因此，旋转轴的切削范围就等于所钻孔的半径。
2.This type of drill may have either three or four flutes and equal number of margins, which ensure superior guidance, thus resulting in high machining accuracy.这种类型的钻具有三个或四个出屑槽以及 相同数量的刃带，这些可确保准确的导向，从而获 得较高的机加工精度。
深孔钻分为两种，即用于钻削盲孔的中心钻和套孔 钻。
另一方面，直柄钻被固定到钻夹中，同理， 钻夹以与锥柄钻相同的方式固定到主轴孔中。
Paragraph 5
1.Twist drills are usually made of high-speed steel, although carbide-tipped drills are also available. The size of twist drills used in industrial range from 0.01 up to 3.25 in. (i.e., 0.25 up to 80 mm).
钻是利用绕轴旋转的钻头在工件上生成通孔或盲 孔的加工工艺。
2.Consequently, the range of cutting from that axis of rotation is equal to the radius of required hole.
因此，旋转轴的切削范围就等于所钻孔的半径。
2.This type of drill may have either three or four flutes and equal number of margins, which ensure superior guidance, thus resulting in high machining accuracy.这种类型的钻具有三个或四个出屑槽以及 相同数量的刃带，这些可确保准确的导向，从而获 得较高的机加工精度。
《机械专业英语unit》课件
Example analysis
Case Studies
Analyze real world case studies to demonstrate practical applications of mechanical writing
Compare and Contrast
Compare different writing styles and techniques to identify best practices
Standard expression: Mechanical English requires standardized and rigorous expression, in accordance with industry standards.
02
Common vocabulary and expressions in mechanical engineering English
Language accuracy
Use precision language and avoid technical errors
Clarity
Use simple language and avoid jargon to ensure the reader easily understands the content
Writing Standards
01
02
03
04
APA Style: Follow the American Psychological Association (APA) style guide for formatting and citations
APA Style: Follow the American Psychological Association (APA) style guide for formatting and citations
机械专业英语课件
Casting process is a manufacturing process in which molten metal is poured or injection and allowed to solidify in a suitably shaped mold cavity. During or after cooling, the cast part is removed from the mold and then processed for delivery （交货）. Casting processes and cast material technologies vary from simple to highly complex. Material and process selection depends on the part’s complexity and function, the product’s quality specification, and the projected cost level.
The molten material is poured into the pouring cup（浇口杯）, which is part of the gating system（浇注系统） that supplies the molten material to the mold cavity. The vertical part of the gating system connected to the pouring cup is the sprue （浇道）, and the horizontal portion is called the runner and finally to the multiple points where it is introduced to be mold cavity called the gates. Additionally there are extensions to the gating system called vents that provide the part for the built-up gases and the displaced air to vent to the atmosphere. Multi- multifunction, multidirectional, multimedia.
机械专业英语课件
上一课回顾
单词复习： surface roughness gage Dictate决定；对…有决定性影响 Ground down Tool and cutter grinders Pitch diameter Bore
Lesson 11 Numerical Control 数控 coded instructions Patent n.专利 factory floor 工厂车间 Massachusetts Institute of Technology MIT麻省理工学院 Cartesian coordinate system Counterclockwise 重点词汇：
1
2
3
This type of machine tool later gained widespread industrial application because of the need for consistency of dimensions and tighter tolerances.
As soon as the desired hole is drilled, the system moves the spindle to the next programmed location to drill another hole, and so on.
1
2
The spindle (or machine table) movement from one hole location to the next must be done as fast as possible to bring to a minimum the nonproductive time(非生产时间) spent in movement.
单词复习： surface roughness gage Dictate决定；对…有决定性影响 Ground down Tool and cutter grinders Pitch diameter Bore
Lesson 11 Numerical Control 数控 coded instructions Patent n.专利 factory floor 工厂车间 Massachusetts Institute of Technology MIT麻省理工学院 Cartesian coordinate system Counterclockwise 重点词汇：
1
2
3
This type of machine tool later gained widespread industrial application because of the need for consistency of dimensions and tighter tolerances.
As soon as the desired hole is drilled, the system moves the spindle to the next programmed location to drill another hole, and so on.
1
2
The spindle (or machine table) movement from one hole location to the next must be done as fast as possible to bring to a minimum the nonproductive time(非生产时间) spent in movement.
《机械专业英语unit》PPT课件
工业机器人现在正开始对工业进行一场革命。这 些机器人的样子和行为方式不很像人，但它们干的 是人类的工作。
revolutionize v. 革命，革命性变革
Robots are particularly useful in a wide variety of applications, such as material handling, spray painting, spot welding, arch welding, inspection, and assembly, current research efforts focus on creating a “smart” robot that can “see”, “hear, ”and “touch” and consequently make decisions.
Marcy: Ah, I see. The point here is that what we
show you are not other kinds of robots but industrial ones. We needn’t make them look like us humans. Mary: Well, I understand. Now could you tell us what these industrial robots can do for us? Marcy: Sure. These robots can do many things for us. They can help us, for example, to handle materials, spray paint, rescue people from the fire, and even help to explore deep oceans and outer-space. Tom: Uh, how great robots are! But what makes robots able to work for us so marvelously? spray painting 喷涂 marvelously奇迹般地,奇异地
revolutionize v. 革命，革命性变革
Robots are particularly useful in a wide variety of applications, such as material handling, spray painting, spot welding, arch welding, inspection, and assembly, current research efforts focus on creating a “smart” robot that can “see”, “hear, ”and “touch” and consequently make decisions.
Marcy: Ah, I see. The point here is that what we
show you are not other kinds of robots but industrial ones. We needn’t make them look like us humans. Mary: Well, I understand. Now could you tell us what these industrial robots can do for us? Marcy: Sure. These robots can do many things for us. They can help us, for example, to handle materials, spray paint, rescue people from the fire, and even help to explore deep oceans and outer-space. Tom: Uh, how great robots are! But what makes robots able to work for us so marvelously? spray painting 喷涂 marvelously奇迹般地,奇异地
《机械类专业英语》课件
《机械类专业英语》PPT 课件
这是一份关于《机械类专业英语》的PPT课件，涵盖了机械类专业英语的基础 知识、技能培训、实践案例和学习资料推荐。
第一部分：机械类专业英语基础知识
机械类词汇学习
掌握机械类专业中常用的英文词汇，扩展专业词汇量。
机械类专业常用句型
学习机械类专业中常见的句型，提高英语表达能力。
机械类专业常见缩写和术语解释
了解机械类专业中常用的缩写和术语，避免词汇歧义。
第二部分：机械类专业英语技能培训
机械类专业文档英文写作 技巧
分享撰写机械类专业文档的英文 写作技巧和注意事项。
机械类专业技术文献阅读 策略
介绍阅读机械类专业技术文献的 方法和技巧。
机械类专业领域英语口语 表达技巧
分享在机械类专业领域进行英语 口语表达的技巧和经验。
第三部分：机械类专业英语实践案例
1
机械类专业项目报告英文演讲
演示机械类专业项目报告时的英文演讲技巧和范例。
2
机械类专业跨文化交流中的英语技巧
探讨在机械类专业跨文化交流中使用英语的技巧和方法。
3
机械类专业国际会议英语能力培训
培养参加机械类专业国际会议时的英语交流能力和跨文化沟通技巧。
第四部分：机械类专业英语学习资料推荐
1 机械类英语在线学习 2 机械类英语词汇学习 3 机械类英语学习书籍
网站推荐
助手推荐
推荐
介绍几个优质的机械类英 语在线学习网站，提供学 习资习助手工具，帮 助提高词汇记忆。
推荐一些经典的机械类英 语学习书籍，助力学习进 步。
总结
通过本次《机械类专业英语》PPT课件，您将了解机械类专业英语的基础知识、 技能培训、实践案例和学习资料推荐，帮助您提升在机械类专业领域中的英 语能力。
这是一份关于《机械类专业英语》的PPT课件，涵盖了机械类专业英语的基础 知识、技能培训、实践案例和学习资料推荐。
第一部分：机械类专业英语基础知识
机械类词汇学习
掌握机械类专业中常用的英文词汇，扩展专业词汇量。
机械类专业常用句型
学习机械类专业中常见的句型，提高英语表达能力。
机械类专业常见缩写和术语解释
了解机械类专业中常用的缩写和术语，避免词汇歧义。
第二部分：机械类专业英语技能培训
机械类专业文档英文写作 技巧
分享撰写机械类专业文档的英文 写作技巧和注意事项。
机械类专业技术文献阅读 策略
介绍阅读机械类专业技术文献的 方法和技巧。
机械类专业领域英语口语 表达技巧
分享在机械类专业领域进行英语 口语表达的技巧和经验。
第三部分：机械类专业英语实践案例
1
机械类专业项目报告英文演讲
演示机械类专业项目报告时的英文演讲技巧和范例。
2
机械类专业跨文化交流中的英语技巧
探讨在机械类专业跨文化交流中使用英语的技巧和方法。
3
机械类专业国际会议英语能力培训
培养参加机械类专业国际会议时的英语交流能力和跨文化沟通技巧。
第四部分：机械类专业英语学习资料推荐
1 机械类英语在线学习 2 机械类英语词汇学习 3 机械类英语学习书籍
网站推荐
助手推荐
推荐
介绍几个优质的机械类英 语在线学习网站，提供学 习资习助手工具，帮 助提高词汇记忆。
推荐一些经典的机械类英 语学习书籍，助力学习进 步。
总结
通过本次《机械类专业英语》PPT课件，您将了解机械类专业英语的基础知识、 技能培训、实践案例和学习资料推荐，帮助您提升在机械类专业领域中的英 语能力。
《机械类专业英语》课件
Summary
Mastering common sentence patterns and grammar is the key to accurately expressing concepts in the field of machinery.
Detailed description
There are some specific sentence patterns and grammatical structures in Mechanical English, such as passive voice and complex sentence patterns. Learners need to be familiar with these sentence patterns and grammar to ensure that they can accurately and fluently express their meaning in writing and speaking.
Course objectives and learning significanceCourse objective: By studying mechanical engineering English, students will be able to master professional English vocabulary, terminology, and expressions in the field of mechanical engineering, and improve their reading, writing, translation, and communication skills.Learning significance: Students with mechanical English proficiency can better adapt to international demands, enhance their competitiveness in the field of mechanical engineering, and also contribute to promoting technical exchange and cooperation in the field of mechanical engineering.
机械专业英语课件
口语表达
发音和语音训练 常用词汇和表达方式 情景对话模拟练习 听力理解能力提升
写作技能
掌握专业词汇和术语
学会撰写科技论文和报告
了解英语论文的写作规范 和格式
掌握科技论文的常用句型 和表达方式
05
机械专业英语应用场景
技术文献阅读与翻译
技术文献类型：包括技术报告、 研究论文、专利等
翻译技巧：保持准确性、流畅性， 注意文化差异
课件形式多样：包括文本、图片、 视频等多种形式
添加标题
添加标题
添加标题
添加标题
课件内容丰富：涵盖机械专业的 各个方面
注重实践应用：结合实际案例， 注重实践操作和应用能力的培养
07
学习建议与展望
学习方法建议
制定学习计 划：合理安 排时间，确 保每天有足 够的学习时 间
注重实践： 通过实验、 实践等方式 加深对理论 知识的理解
研究生及教师
从事机械行业的技术人员
对机械专业感兴趣的人士
03
机械专业基础知识
机械专业词汇
机械专业基础词汇
常用机械部件名称
机械加工工艺流程
常用工具和测量仪器
机械原理与设计
机械原理：介绍 机械的基本原理、 机构、传动系统 等基础知识
机械设计：介绍 机械设计的基本 原则、方法、步 骤以及常用的设 计软件等
机械制造工艺： 介绍机械制造的 基本工艺、加工 方法、设备等
机械工程材料： 介绍常用的机械 工程材料及其性 能特点、应用范 围等
制造工艺与设备
制造工艺：介绍机械制 造的基本流程，包括毛 坯制造、零件加工、热 处理等关键环节。
设备：介绍常用的机 械加工设备，如车床、 铣床、磨床、钻床等， 以及它们的基本原理 和操作方法。
机械制造技术英文PPT16
Under the same cutting condition, the machinability is poor if the cutting force is large or the cutting temperature is high. When machine tool power is insufficient, this index is commonly used. Such as copper, aluminum machining better than steel, gray cast iron machining better than cold cast iron, normalizing 45 steel cutting better than quenched 45 steel. When rough machining or process system is less rigid, cutting power can also be used as a machining index.
2、Factors affecting the machinability of workpiece materials
（1）Mechanical properties of materials
1) Hardness and strength: The hardness and strength of the material are moderate, and its machinability is better. The higher the hardness and strength, the worse the machinability of the material. Such as normalizing 45 steel, its hardness is HB200, when the tensile strength σb is 640MPa, it is easy to cut; The hardness of quenched steel reaches HRC55~65, Tensile strength σb up to 2100~2600MPa, its machinability is very poor. 2) Toughness and plasticity: For materials with high toughness (impact value αK) and plasticity (elongation δ), the cutting resistance, cutting deformation and cutting heat generated during machining are large, and their machinability is also poor. 3) Thermal conductivity v
2、Factors affecting the machinability of workpiece materials
（1）Mechanical properties of materials
1) Hardness and strength: The hardness and strength of the material are moderate, and its machinability is better. The higher the hardness and strength, the worse the machinability of the material. Such as normalizing 45 steel, its hardness is HB200, when the tensile strength σb is 640MPa, it is easy to cut; The hardness of quenched steel reaches HRC55~65, Tensile strength σb up to 2100~2600MPa, its machinability is very poor. 2) Toughness and plasticity: For materials with high toughness (impact value αK) and plasticity (elongation δ), the cutting resistance, cutting deformation and cutting heat generated during machining are large, and their machinability is also poor. 3) Thermal conductivity v
机械专业专业英语讲义PPT课件
第16页/共192页
9. tension/compression 10.strain/microstrain 11.cross-section 12.engineering materials 13.ferrous alloy/non-ferrous alloy 14. elastic limit 15. modulus of elasticity
一、课程性质与学习任务
1 、课程性质：是一门专业特色选修课。 2 、学习任务：掌握机制专业有关的专业术 语,能够阅读、理解、并准确翻译科技
文献。
二、课程特点及重点、难点
1 、课程特点：本课程是在大学英语及所学专业 课的基础上开设的,文章的专业术语多,句子长,且 多用被动语态,理解需与专业知识相结合。
第23页/共192页
8.static/dynamic force 9.approximate/approximation Language Points: 1.It is clear that 2.It is preferable to do 3.applicable/tractable
第24页/共192页
第14页/共192页
6.A particular form of elasticity which applies to a large range of engineering materials ， at least over part of their load range ， produces deformation which are proportional to the loads producing them.
eg. Pistons that are moving up are moving at different speeds than pistons that are moving down. 2）注意固定搭配。如：convert … into,consist of等。
9. tension/compression 10.strain/microstrain 11.cross-section 12.engineering materials 13.ferrous alloy/non-ferrous alloy 14. elastic limit 15. modulus of elasticity
一、课程性质与学习任务
1 、课程性质：是一门专业特色选修课。 2 、学习任务：掌握机制专业有关的专业术 语,能够阅读、理解、并准确翻译科技
文献。
二、课程特点及重点、难点
1 、课程特点：本课程是在大学英语及所学专业 课的基础上开设的,文章的专业术语多,句子长,且 多用被动语态,理解需与专业知识相结合。
第23页/共192页
8.static/dynamic force 9.approximate/approximation Language Points: 1.It is clear that 2.It is preferable to do 3.applicable/tractable
第24页/共192页
第14页/共192页
6.A particular form of elasticity which applies to a large range of engineering materials ， at least over part of their load range ， produces deformation which are proportional to the loads producing them.
eg. Pistons that are moving up are moving at different speeds than pistons that are moving down. 2）注意固定搭配。如：convert … into,consist of等。
《机械工程专业英语》PPT课件
•
•
Mechanical Engineering English
Dialogue Two
译文
• Mr. King: How about the activities in your school? • Lily: It blooms in every corner of campus.
Associations of different varieties organized by students with the same interest develop various popular activities such as Foreign Languages Festival and Computer Science Festival.
Mechanical Engineering English
• • • • • •
interrelate [ .intə(:)ri'leit ] v. 互相关连,相关 ecology [ i(:)'kɔlədʒi ] n. 生态学 reinstate [ 'ri:in'steit ] v. 恢复; vt. 使恢复原有的职位 assurance [ ə'ʃuərəns ] n. 保证,确信,保险 thrust [ θrʌst ] n. 推力,刺,力推; v. 插入,推挤,刺 incorporate [ in'kɔ:pəreit ] a. 合并的,公司组织的,具 体化的; v. 合并,组成公司,具体表现
Mechanical Engineering English
Lesson 3
机械工程 专业英语
Mechanical Engineering Design
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。
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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.
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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.
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18
The machining operations are done by cutting tools mounted on the turret and on the cross slide.
机械专业英语(课堂PPT)
Traditional forms of fastening include nuts, bolts, screws and rivets.
They are frequently used and most of them have been standardized with their shapes and sizes.
90。 Slotted countersunk
Slotted
Slotted
Square
round head cheese head head
Slotted Slotted Slotted Phillips Hexagon
fillister instrument head head socket
head
Figure 2.17 Applications of screwed fasteners.
.
21
2.3 Keys and Pins 2.3.1 Keys Figure 2.18 Keys.
(a) Parallel keys (b) Semicircular keys (c) Tapered keys
.
25
2.6 Spring
Functions of springs:
Clamp
Store elastic energy
Reduce shock.
(a) Helical compression (b) Helical extension (c) Torsion springs.
springs.
Friction material
Output
Figure 2.28 Idealized friction disc clutch or brake.
They are frequently used and most of them have been standardized with their shapes and sizes.
90。 Slotted countersunk
Slotted
Slotted
Square
round head cheese head head
Slotted Slotted Slotted Phillips Hexagon
fillister instrument head head socket
head
Figure 2.17 Applications of screwed fasteners.
.
21
2.3 Keys and Pins 2.3.1 Keys Figure 2.18 Keys.
(a) Parallel keys (b) Semicircular keys (c) Tapered keys
.
25
2.6 Spring
Functions of springs:
Clamp
Store elastic energy
Reduce shock.
(a) Helical compression (b) Helical extension (c) Torsion springs.
springs.
Friction material
Output
Figure 2.28 Idealized friction disc clutch or brake.
机械工程专业英语课件-经典
Lesson 37 Milling Machines and Grinding Machines Lesson 38 Drilling Operations Lesson 44 Nontraditional Manufacturing Processes Lesson 62 The Computer and Manufacturing Lesson 63 Computers in Design and Manufacturing Lesson 64 Computer-Aided Analysis of Mechanical Systems Lesson 65 Computer-Aided Process Planning Lesson 66 Numerical Control Lesson 71 Industrial Robots Lesson 77 Technical Report Elements Lesson 78 Writing the Technical Report Extra lesson 1 English for International Academic Exchange Extra lesson 2 Expression of Numbers, Signs, Equations and Graphs in English Extra lesson 3 Professional Literature and Patent Retrieval
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除了常规钻孔以外，有其他加工工序涉及 到工业实践中的孔加工。以下是这些工序 的简短描述。
31.07.2020
《机械工程专业英语教程》
16
Boring Boring involves enlarging a hole that has already been drilled. It is similar to internal turning and can, therefore, be performed on a lathe. There are also some specialized machine tools for carrying out boring operations. Those include the vertical boring machine, the jig boring machine, and the horizontal boring machine.
4.Core drills are employed for enlarging previously made holes and not for originating holes.
扩孔钻是用来扩孔而不是用来钻孔的。
Paragraph 7
5.This type of drill is characterized by greater productivity, high machining accuracy, and superior quality of the drilled surfaces.
2.The drill can have either one or more cutting edges and corresponding flutes, which can be straight or helical.
钻头可能有一个或多个切削刃(棱边)以及直立 的或螺旋状的排屑槽。
Paragraph 3
2.This type of drill may have either three or four flutes and equal number of margins, which ensure superior guidance, thus resulting in high machining accuracy.这种类型的钻具有三个或四个出屑槽以及 相同数量的刃带，这些可确保准确的导向，从而获 得较高的机加工精度。
3.The function of the flutes is to provide outlet passages for the chips generated during the drilling operations and also to allow lubricants and coolants to reach the cutting edges and the surface being machined. Following is a survey of the common used drills.
排屑槽的作用就是为钻加工过程中产生的碎 片提供出口通道，同时允许润滑剂和冷却剂流到 切削刃和被加工的工件表面上。下面是平常所使 用钻头的概况。
Paragraph 4
1.Twist drill. The twist drill is the most common type of drill.
螺旋钻(麻花钻).麻花钻是最常用的钻头。 2.It has two cutting edges and two helical flutes that continue over the length of the drill body. 麻花钻具有两个切削刃(棱边)以及两道沿钻体的螺旋 槽。
2.The latter has a cylindrical groove at its center, thus generating a solid core, which guides the tool as it proceeds during the drilling operation.
钻削加工有手钻和钻床两种方式。钻床的大 小和结构各不相同。
2.Nevertheless, the tool always rotates around its axis while the workpiece is kept firmly fixed. This is contrary to drilling on a lathe.
然而，钻床加工中钻头总是绕轴旋转而工件 保持固定。这与车床上的钻加工相反。
Paragraph 3
1.In drilling operations, a cylindrical rotaryend cutting tool, called a drill, is employed.
在钻加工中，采用了一种圆柱形的、端面旋 转的刀具，称为钻头。
尽管在加工中有硬质合金的钻头，但麻花钻 通常由高速钢作成。在工业生产实践中，麻花钻 的尺寸大小通常在0.01至3.25英寸的范围内。(即 是0.25到80毫米)。
Paragraph 6
1.Core drills. A core drill consists of the chamfer, body, neck, and shank.扩孔钻：扩孔钻由倒角槽、 钻体、钻颈和钻柄组成。
3.In practice, two symmetrical cutting edges that rotate about the same axis are employed.
实际上是利用绕同一轴的旋转的两个对称切削刃 (棱边)来进行加工的。
Paragraph 2
1.Drilling operations can be carried out by using either hand drills or drilling machines. The latter differ in size and construction.
对于后者，柄部可通过楔紧作用将其固定在 主轴的锥形孔中，柄部还有一个柄脚，柄脚插入 到主轴锥形孔的插槽中，这样就可以可靠的方式 传递扭矩。
Paragraph 4
5.On the other hand, straight-shank drills are held in a drill chunk that is, in turn, fitted into the spindle socket in the same way as tapered shank drills.
扁钻：扁钻用于钻削3.5英寸或更大的孔。 2.Their design results in a marked saving in cost of the tool as well as a tangible reduction in its weight, which facilitates its handling. Moreover, this type of drill is easy to be grind. 它们的设计明显降低了钻头的生产成本、切 实的减轻了重量，以便于钻头的操纵。而且，这 种类型钻头易于磨削。
3.The drill also consists of a neck and a shank that can be either straight or tapered.
钻头也包括一个钻颈和一个可为直柄或锥柄的柄部。
Paragraph 4
4.In the latter case, the shank is fitted by the wedge action into the tapered socket of the spindle and has a tang, which goes into a slot in the spindle socket, thus acting as a solid means for transmitting rotation.
另一方面，直柄钻被固定到钻夹中，同理， 钻夹以与锥柄钻相同的方式固定到主轴孔中。
Paragraph 5
1.Twist drills are usually made of high-speed steel, although carbide-tipped drills are also available. The size of twist drills used in industrial range from 0.01 up to 3.25 in. (i.e., 0.25 up to 80 mm).
Paragraph 7
3.A core drill has flat end. The chamfer can have three or four cutting edges or lips, and the lip angle may between 90。 and 120。
扩孔钻有一个扁形的柄脚。倒角槽有三四个 切削刃或刀刃，刀刃角从90度到120度大小不等。
1.There are two kinds of gun drills, namely, the center-cut gun drill used for drilling blind holes and the trepanning drill.
深孔钻分为两种，即用于钻削盲孔的中心钻和套孔 钻。
Specialized English
Unit 24 Drilling Operations
Paragraph 1
1.Drilling involves producing through or blind holes in a workpiece by forcing a tool, which rotates around its axis, against the workpiece.
2.A hole in the body acts as a conduit to transmit coolant under considerable pressure to the tip of the drill.深孔钻体的孔的作用相当于一个导管，在钻顶部的 压力下把冷却液输送到底部。Paragraph 9
31.07.2020
《机械工程专业英语教程》
16
Boring Boring involves enlarging a hole that has already been drilled. It is similar to internal turning and can, therefore, be performed on a lathe. There are also some specialized machine tools for carrying out boring operations. Those include the vertical boring machine, the jig boring machine, and the horizontal boring machine.
4.Core drills are employed for enlarging previously made holes and not for originating holes.
扩孔钻是用来扩孔而不是用来钻孔的。
Paragraph 7
5.This type of drill is characterized by greater productivity, high machining accuracy, and superior quality of the drilled surfaces.
2.The drill can have either one or more cutting edges and corresponding flutes, which can be straight or helical.
钻头可能有一个或多个切削刃(棱边)以及直立 的或螺旋状的排屑槽。
Paragraph 3
2.This type of drill may have either three or four flutes and equal number of margins, which ensure superior guidance, thus resulting in high machining accuracy.这种类型的钻具有三个或四个出屑槽以及 相同数量的刃带，这些可确保准确的导向，从而获 得较高的机加工精度。
3.The function of the flutes is to provide outlet passages for the chips generated during the drilling operations and also to allow lubricants and coolants to reach the cutting edges and the surface being machined. Following is a survey of the common used drills.
排屑槽的作用就是为钻加工过程中产生的碎 片提供出口通道，同时允许润滑剂和冷却剂流到 切削刃和被加工的工件表面上。下面是平常所使 用钻头的概况。
Paragraph 4
1.Twist drill. The twist drill is the most common type of drill.
螺旋钻(麻花钻).麻花钻是最常用的钻头。 2.It has two cutting edges and two helical flutes that continue over the length of the drill body. 麻花钻具有两个切削刃(棱边)以及两道沿钻体的螺旋 槽。
2.The latter has a cylindrical groove at its center, thus generating a solid core, which guides the tool as it proceeds during the drilling operation.
钻削加工有手钻和钻床两种方式。钻床的大 小和结构各不相同。
2.Nevertheless, the tool always rotates around its axis while the workpiece is kept firmly fixed. This is contrary to drilling on a lathe.
然而，钻床加工中钻头总是绕轴旋转而工件 保持固定。这与车床上的钻加工相反。
Paragraph 3
1.In drilling operations, a cylindrical rotaryend cutting tool, called a drill, is employed.
在钻加工中，采用了一种圆柱形的、端面旋 转的刀具，称为钻头。
尽管在加工中有硬质合金的钻头，但麻花钻 通常由高速钢作成。在工业生产实践中，麻花钻 的尺寸大小通常在0.01至3.25英寸的范围内。(即 是0.25到80毫米)。
Paragraph 6
1.Core drills. A core drill consists of the chamfer, body, neck, and shank.扩孔钻：扩孔钻由倒角槽、 钻体、钻颈和钻柄组成。
3.In practice, two symmetrical cutting edges that rotate about the same axis are employed.
实际上是利用绕同一轴的旋转的两个对称切削刃 (棱边)来进行加工的。
Paragraph 2
1.Drilling operations can be carried out by using either hand drills or drilling machines. The latter differ in size and construction.
对于后者，柄部可通过楔紧作用将其固定在 主轴的锥形孔中，柄部还有一个柄脚，柄脚插入 到主轴锥形孔的插槽中，这样就可以可靠的方式 传递扭矩。
Paragraph 4
5.On the other hand, straight-shank drills are held in a drill chunk that is, in turn, fitted into the spindle socket in the same way as tapered shank drills.
扁钻：扁钻用于钻削3.5英寸或更大的孔。 2.Their design results in a marked saving in cost of the tool as well as a tangible reduction in its weight, which facilitates its handling. Moreover, this type of drill is easy to be grind. 它们的设计明显降低了钻头的生产成本、切 实的减轻了重量，以便于钻头的操纵。而且，这 种类型钻头易于磨削。
3.The drill also consists of a neck and a shank that can be either straight or tapered.
钻头也包括一个钻颈和一个可为直柄或锥柄的柄部。
Paragraph 4
4.In the latter case, the shank is fitted by the wedge action into the tapered socket of the spindle and has a tang, which goes into a slot in the spindle socket, thus acting as a solid means for transmitting rotation.
另一方面，直柄钻被固定到钻夹中，同理， 钻夹以与锥柄钻相同的方式固定到主轴孔中。
Paragraph 5
1.Twist drills are usually made of high-speed steel, although carbide-tipped drills are also available. The size of twist drills used in industrial range from 0.01 up to 3.25 in. (i.e., 0.25 up to 80 mm).
Paragraph 7
3.A core drill has flat end. The chamfer can have three or four cutting edges or lips, and the lip angle may between 90。 and 120。
扩孔钻有一个扁形的柄脚。倒角槽有三四个 切削刃或刀刃，刀刃角从90度到120度大小不等。
1.There are two kinds of gun drills, namely, the center-cut gun drill used for drilling blind holes and the trepanning drill.
深孔钻分为两种，即用于钻削盲孔的中心钻和套孔 钻。
Specialized English
Unit 24 Drilling Operations
Paragraph 1
1.Drilling involves producing through or blind holes in a workpiece by forcing a tool, which rotates around its axis, against the workpiece.
2.A hole in the body acts as a conduit to transmit coolant under considerable pressure to the tip of the drill.深孔钻体的孔的作用相当于一个导管，在钻顶部的 压力下把冷却液输送到底部。Paragraph 9