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图纸中的一些实用翻译

图纸中的一些实用翻译
图纸中的一些实用翻译

图纸中的一些实用翻译

ALL WELDS CONTINUOUS UNLESS O THERWISE STATED. 未注焊缝均为连续焊

ALL WELDS 3mm FILLET UNLESS OT HERWISE STATED 未注焊角高3mm. ALL UNSPECIFIED RADI - R3 未注圆角R3

REMOVE ALL BURRS AND SHARP ED GES 所有尖角/棱角倒角并去毛

11 TOTAL COILS APROX.9 WORKING COILS APROX.RIGHT HAND WOUND ONLY,END COILS SQUARE TO TOUCH.总圈数约11圈;工作圈数约9圈;右旋;弹簧的端部磨平以便于接触.(此为弹簧技术说明)

CHANNEL 槽钢

RSA 708 角钢70X70X8

M30X1.5 pitch M30X1.5的锥螺纹Tackweld 点焊

OD 1/4" outside dimension 1/4"的缩写外径直1/4"

75 CRS 尺寸为75 材质为冷轧钢板

410 OPENING REF 410 开口参考尺寸

40 REF 尺寸为40,参考值

2.5" BSP 2.5” 圆锥管螺纹

2.5" BSPT HEXAGON 2.5” 六角圆锥管螺纹(即对丝) 30x2.5 FLAT BAR 30X2.5 扁钢

TYP 2 POSNS 2处

FEMALE: 内扣(母扣)

MALE: 外扣(公扣)

偏心轴eccentric shaft

销轴PIN

开口销COTTER PIN

螺杆screw

轴承axletree

挡圈closing ring

弹性挡圈circlip

弹簧SPRING

紧定螺钉SET SCREW

圆螺母ROUND NUT

平键FLAT KEY

圆螺母ROUND NUT

六角螺栓HEX HD BOLT

无扣长non-buckle longth

平垫圈FLAT WASHER

螺母FULL NYLOCK NUT

吊环螺钉LIFTING EYE BOLT

内六角螺钉SOCKET HEAD CAP SCRE W

六角螺钉HEX HD SETSCREW

轴承隔套distance sleeve of axletree

深沟球轴承DEEP GROOVE BALL BEA RING

开槽盘头螺钉SLOTTED PAN HEAD SC REW

圆锥滚子轴承TAPERED ROLLER BEAR ING

推力球轴承THRUST BALL BEARING 弹簧垫圈SINGLE COIL SPRING WASH ER

缩写全称翻译

ACCESS Accessory 附件

ADJ Adjustable,Adjust 调整

ADPT Adapter 使适应

ADV Advance 提前

AL Aluminum 铝

ALLOW Allowance 允许

ALT Alternate 改变

ALY Alloy 合金

AMT Amout 数量

ANL Anneal 锻炼

ANSL Amer Natl Stds Institute APPROX Approximate 大约

ASME Amer Society of Mech Engrs ASSEM Assemble 装配

ASSY Assembly 装配

AUTH Authorized 授权的

AUTO Automatic 自动的

AUX Auxiliary 辅助的

AVG Average 平均

AWG American Wire Gauge

BC Bolt Circle 螺栓圆周BET Between 之间

BEV Bevel 斜角

BHN Brinell Hardness Number布氏硬度值BLK Blank ,Block 空白

B/NM Bill of Material 材料费

BOT Bottom 底部

BP or B/P Blueprint 蓝图

BRG Bearing 轴承

BRK Break 破裂

BRKT Bracket 支架

BRO Broach 钻孔

BRS Brass 黄铜

BRZ Bronze 青铜

B&S Brown&Shape 棕色&形状

BSC Basic 基本的

BUSH Bushing 套管

BWG Birmingham Wire Gauge

C TO C Center-to-Center 中心到中心CA

D Computer-Aided Drafting 电脑辅助设计

CAM Computer-Aided Mfg

CAP Capacity 容量

CAP SCR Cap Screw 螺帽

CARB Carburize 使渗碳

CBORE Counterbore 扩孔

CCW Counter Clockwise 逆时针

CDRILL Counerdrill

CDS Cold-Drawn Steel

缩写全称翻译

EFF Effective 有效的

ENCL Enclose,Enclosure 附上

ENG Engine 引擎

ENGR Engineer 工程师

ENGRG Engineering 工程学

EQLSP Equally Spaced 等距

EQUIV Equivalent 相等

EST Estimate 估计

EX Extra 额外

EXH Exhaust 消耗

EXP Experimental 实验性的

EXT Exension,External 范围,外部FAB Fabricate 伪造

FAO Finish All Over

FDRY Foundry 铸造

FIG Figure 数据

FIL Fillet,fillister 带子

FIM Full Indicator Movement

FIN Finish

FLX Fixture 结构

FLX Floor.Fluid,Flush 基地,液体,冲洗FLEX Flexible 易弯曲的

FLG Flange 边缘

FORG Forging 锻炼

FR Frame,Front 边框

FIG Fitting 装置

FURN Furnish 提供

FWD Forward 向前

GA Gage,Gauge 测量GALV Galvanized 电镀

GR Grade 等级

GRD Grind 磨碎

GRV Groove 凹槽

GSKT Gasket 垫圈

H&G Harden and Grind 加硬和磨碎HD Head 主要的

HDL Handle 处理

HDLS Headless 无领导的

HDN Harden 使硬化

HDW Hardware 硬件

HEX Hexagon 六边形

HGR Hanger 衣架

HGT Height 高度

HOR Horizontal 水平的

HRS Hot-Rolled Steel

HSG Housing 外罩

HT TR Heat Treal

缩写全称翻译

NTS Not to Scale

OA Over All 所有

OBS Obsotetc

OC On Center

OD Outside Diameter 外直径

OPP Opposite 对立

OPTL Optional 可选择的

OR Outside Radius 外半径

ORIG Original 初始的

PAT. Patent 专利

PATT Pattern 形式

PC Piece,Pitch Circle 件,节距圆PCH Punch 打孔

PD Pitch Diameter

PERF Perforate 打孔

PERM Permanent 永久的

PERP Perpendicular 垂直的

PFD Preferred 首选的

PKG Package,Packing 包装

PL Parting Line,Places,Plate

PNEU Pncumatic

PNL Panel 面板

POL Polish 磨光

POS Position,Postive 位置

PR Pair 对立

PRI Primary 基本的

PROC Process 程序

PROD Product,Production 产品,产量PSI Pounds per Square Inch

PT Part,Point 零件,点

QTR Quarter 四份之一

QTY Quantity 数量

QUAL Quality 质量

R Radius 半径

RA Rockwell Harden,A-Scale

RB Rockwell Harden,B-Scale

RC Rockwell Harden,C-Scale

RECD Received 巳收到的

RECT Rectangle 长方形REF Reference 相关的

REINF Reinforce 增强

REL Release,Relief 释放,缓解REM Remove 移除

REQD Requird 有需要

REE Retainer,Return

REV Reverse,Revision,Revolution RFS Regardless of Feature Size RGH Rough 粗糙的

RH Right Hand 右手

RIV Rivet 起皱

RM Ream 扩展

RND Round 周围

RPM Revolutions per Minute RPW Resistance Projection Weld SAE Society of Automotive Engrs SCH Schedule 进度表

缩写全称翻译

CFS Cold-Finished Steel

CH Case Harden

CHAM Chamfer 斜面

CHAN Channel 渠道

CHG Change 改变

CHK Check 核查

CI Cast Iron 铸铁

CIR Circle, Circular 圆周

CIRC Circumference 圆周

CL Centerline 中心线

CLP Clamp 夹子

CNC Computer Numerical Control 电脑数值控制

COMB Combination 联合

COML Commercial 商业的

CONC Concentric 同中心的

CONN Connect,Connector 连接器

COV Cover 盖子

CPLG Coupling 联结

CQ Commercial Quality 商业等级钢CRS Cold Stds Association

CRT Cathode Ray Tube 阴级射线管

CS Cast Steel 铸铁

CSA Canadian Stds Association

CSK Countersink 埋头孔

CSTG Casting 铸件

CTR Center 中心

CU Cubic 立方米

CW Clockwise 顺时针

CYL Cylinder,Cylindrical 柱面

DBL Double 双倍

DEC Decimal 小数

DEG Degree 摄氏度

DET Detail 详情

DEV Develop 发展

DFT Draft 草稿

DIA Diameter 直径

DIM Dimension 尺寸

DIST Distance 距离

DN Down 向下DP Deep,Diametral Pitch 深度,径节

DR Drill,Drill Rod 钻孔

DSGN Design 设计

DVTL Dovetail 吻合

DWG Drawing 图纸

DWL Dowel 木钉

DWN Drawn 拔出

EA Each 每个

ECC Eccentric 古怪

缩写全称翻译

HVY Heavy 重量

HYD Hydraulic 水压

ID Inside Diameter 内部直径

IDENT Identification 鉴定

ILLUS Illustration 说明

IN Inch 英寸

INCL Include,Including 包括

INCR Increase 增加

INFO Information 信息

INSP Inspect 检查

INSTL Install 安装

INST Instruct,Instrument 指示,工具

INT Interior,Internal,Intersect 内部的,内在的,交叉

IR Inside Radius 内部半径

ISO Internal Stds Organization 国际标准化组织

JCT Junction 连结

JNT Journal 杂志

JT Joint 连接

K Key 关键

KNRL Knurl 硬节

KST Keyseat

KWY Keyway 键沟

LB Pound 英镑

LBL Label 标签

LG Length,Long 长度

LH Left Hand 左手

LMC Least Material Condition LOC Locate 位于

LT Light 光

LTR Letter 信

LUB Lubricate 润滑

MACH Machine 机器

MAINT Maintenance 维护

MATL Material 材料

MAX Maximum 最大

MECH Mechanical,Mechanism 机械MED Medium 媒介

MFG Manufacturing 制造业

MI Malleable Iron 可锻造的铁MIN Minimum, Minute 最小,秒MISC Miscellaneous 混杂的

MM Millimeter 毫米

MMC Max Material Condition

MS Machine Steel

MTG Mouting 装备

MULT Multiple 倍数MWG Music Wire Gagug

NA Not Applicable 不可应用的NATL National 国内的

NC Numerical Control 数字电脑控制NEG Negative 忽略的

NO. Number 号码

NOM Nominal 名义上的

NPSM Natl Pipe Straight Mech NPT Natl Pipe Tapered

缩写全称翻译

SCR Screw 螺丝

SEC Second 秒

SECT Section 部分

SEP Separate 独立

SEQ Sequence 顺序

SER Serial,Series 系列

SERR Serrate 锯齿状

SF Spotface

SFT Shaft 轴

SGL Single 单个

SH Sheet 纸

SI Intl System of Units

SL Slide 使滑动

SLV Sleeve 袖子

SOC Socket 插座

SP Space,Spaced,Spare 空间

SPL Special 特别

SPEC Specification 规格

SPG Spring 跳

SPHER Spherical 球体

SPRKT Sprocket 链轮齿

SQ Square 平方

SST Stainless Steel 纯铁

STD Standard 标准

STK Stock 存货

STL Steel 铁

STR Straight,Strip 直的

SUB Substitute 替代物

SUP Supply,Support 供应

SURF Surface 表面

SYM Symmetrical 对称的

SYS System 系统

T Teeth,Tooth 牙齿

TECH Technical 技术

TEMP Template,Temporary模板,暂时的THD Thread 线

THK Thick 厚的

TOL Tolerance 公差

TOT Total 总计

TPF Taper per Foot

TPI Taper per In,Threads per Inch

TPR Taper 锥形

TS Tool Steel

TYP Typical 典型

UNC Unified Natl Coarse

UNEF Unified Natl Extra Fine

UNF Unified Natl Fine

UNIV Universal 普遍VAR Variable 变量

VERT Vertical 垂直的

VOL Volume 音量

VS Versus 与..相对

W Wide,Width 宽度

WASH Washer 洗衣机

WDF Woodruff 车叶草

WI Wrought Iron 熟铁

WT Weight 重量

SAE Extra fine 美国汽车工程师协会的超细牙螺纹例:1/2-28 SAE Extra fine SAE Reg 美国汽车工程师协会的标准系列螺纹例:1/2-20 SAE Reg

SAE-LT 美国汽车工程师协会的圆锥外螺纹例:1/2-28 SAE-LT

机械图纸中英文翻译2(1)1

近几年,我厂和英国、西班牙的几个公司有业务往来,外商传真发来的图纸都是英文标注,平时阅看有一定的困难。下面把我们积累的几点看英文图纸的经验与同行们交流。 1标题栏 英文工程图纸的右下边是标题栏(相当于我们的标题栏和部分技术要求),其中有图纸名称(TILE)、设计者(DRAWN)、审查者(CHECKED)、材料(MATERIAL)、日期(DATE)、比例(SCALE)、热处理(HEAT TREATMENT)和其它一些要求,如: 1)TOLERANCES UNLESS OTHERWISE SPECIFIAL 未注公差。 2)DIMS IN mm UNLESS STATED 如不做特殊要求以毫米为单位。 3)ANGULAR TOLERANCE±1°角度公差±1°。 4)DIMS TOLERANCE±0.1未注尺寸公差±0.1。 5)SURFACE FINISH 3.2 UNLESS STATED未注粗糙度3.2。 2常见尺寸的标注及要求 2.1孔(HOLE)如: (1)毛坯孔:3"DIAO+1CORE 芯子3"0+1; (2)加工孔:1"DIA1"; (3)锪孔:锪孔(注C'BORE=COUNTER BORE锪底面孔); (4)铰孔:1"/4 DIA REAM铰孔1"/4; (5)螺纹孔的标注一般要表示出螺纹的直径,每英寸牙数(螺矩)、螺纹种类、精度等级、钻深、攻深,方向等。如:例1.6 HOLES EQUI-SPACED ON 5"DIA (6孔均布在5圆周上(EQUI-SPACED=EQUALLY SPACED均布) DRILL 1"DIATHRO' 钻1"通孔(THRO'=THROUGH通) C/SINK22×6DEEP 沉孔22×6 例2.TAP7"/8-14UNF-3BTHRO' 攻统一标准细牙螺纹,每英寸14牙,精度等级3B级 (注UNF=UNIFIED FINE THREAD美国标准细牙螺纹) 1"DRILL 1"/4-20 UNC-3 THD7"/8 DEEP 4HOLES NOT BREAK THRO钻1"孔,攻1"/4美国粗牙螺纹,每英寸20牙,攻深7"/8,4孔不准钻通(UNC=UCIFIED COARSE THREAD 美国标准粗牙螺纹) 1"-14NS-2THRO 攻美国固定特种螺纹M1",每英寸牙数14,精度等级为二级 (注NS=NATIONAL SPECIAL THREAD:美国固定特种标准)

工程图纸常用英文翻译整理

Index 索引;卡片索引;文献索引 The index is arranged in alphabetical order. 索引按字母顺序排列。 Version与edition区别 version 包含有转化过程,比如翻译过程,一本书有中文版,后来有了English version. 一个话剧后来出了电影,也叫movie version. 而edition 只包含修改、补充过程,大体上原封不动,没有conversion (转化)过程。Revision 修订本,订正版[C] A revision of that dictionary has been published. 那本词典的修订本已经出版。 Edition What is the edition of this drawing? 这张图纸是第几版? Version Kernel version must be2.2.14or later. 内核版本必须是2.2.14或者更新。 A shortened version of a written work. 书写著作的缩短版本。 1. PKPM series of building engineering CAD software package (ver. 2006.12) 厂区占地面积 科技名词定义 中文名称:厂区占地面积 英文名称:

of power plant 定义:厂区围墙内(生产区)用地面积总和。占地面积——land area 英汉建筑大词典 building area 英汉建筑大词典 floor area n.建筑各层面积;n.楼板面积 Layout 平面模板图 Slab 平板 Mater Plan 总体设计 Pole与Strut区别 Pole 及物动词 vt. 用杆支撑 He poled the raft down the river. 他用篙撑筏沿江而下。 Strut 1. 支撑;支柱;压杆;对角撑 建筑业名称英语词汇_论文_价格_课件_标准... strut支撑;支柱;压杆;对角撑 2.

机械专业术语英文翻译

陶瓷 ceramics 合成纤维 synthetic fibre 电化学腐蚀 electrochemical corrosion 车架 automotive chassis 悬架 suspension 转向器 redirector 变速器 speed changer 板料冲压 sheet metal parts 孔加工 spot facing machining 车间 workshop 工程技术人员 engineer 气动夹紧 pneuma lock 数学模型 mathematical model 画法几何 descriptive geometry 机械制图 Mechanical drawing 投影 projection 视图 view 剖视图 profile chart 标准件 standard component 零件图 part drawing 装配图 assembly drawing 尺寸标注 size marking

技术要求 technical requirements 刚度 rigidity 内力 internal force 位移 displacement 截面 section 疲劳极限 fatigue limit 断裂 fracture 塑性变形 plastic distortion 脆性材料 brittleness material 刚度准则 rigidity criterion 垫圈 washer 垫片 spacer 直齿圆柱齿轮 straight toothed spur gear 斜齿圆柱齿轮 helical-spur gear 直齿锥齿轮 straight bevel gear 运动简图 kinematic sketch 齿轮齿条 pinion and rack 蜗杆蜗轮 worm and worm gear 虚约束 passive constraint 曲柄 crank 摇杆 racker 凸轮 cams

机械图纸英语缩写

以下是我在工作中常用的 ALL WELDS CONTINUOUS UNLESS OTHERWISE STATED. 未注焊缝均为连续焊 ALL WELDS 3mm FILLET UNLESS OTHERWISE STATED 未注焊角高3mm. ALL UNSPECIFIED RADI - R3 未注圆角R3 REMOVE ALL BURRS AND SHARP EDGES 棱角倒钝CHANNEL 槽钢 RSA 708 角钢70X70X8 M30X1.5 pitch M30X1.5的锥螺纹Tackweld 点焊 OD 1/4" outside dimension 1/4"的缩写外径直1/4" 75 CRS 尺寸为75 材质为冷轧钢板 410 OPENING REF 410 开口参考尺寸 40 REF 尺寸为40,参考值 2.5" BSP 2.5”  圆锥管螺纹 六角圆锥管螺纹(即2.5" BSPT HEXAGON 2.5”  对丝) 30x2.5 FLAT BAR 30X2.5 扁钢 TYP 2 POSNS 2处 11 TOTAL COILS APROX.9 WORKING COILS APROX.RIGHT HAND WOUND ONLY,END COILS SQUARE TO TOUCH.

总圈数约11圈;工作圈数约9圈;右旋;弹簧的端部磨平以便于接触.(此为弹簧技术说明) FEMALE: 内扣(母扣) MALE: 外扣(公扣) 偏心轴eccentric shaft 销轴PIN 开口销COTTER PIN 螺杆screw 紧定螺钉SET SCREW 圆螺母ROUND NUT 内六角螺钉SOCKET HEAD CAP SCREW 六角螺钉HEX HD SETSCREW 六角螺栓HEX HD BOLT 挡圈closing ring 弹性挡圈circlip 轴承隔套distance sleeve of axletree 轴承axletree 深沟球轴承DEEP GROOVE BALL BEARING 无扣长non-buckle longth 弹簧SPRING 吊环螺钉LIFTING EYE BOLT 开槽盘头螺钉SLOTTED PAN HEAD SCREW

(机械制造行业)机械英文翻译

英文翻译 机械设计 一台完整机器的设计是一个复杂的过程。机械设计是一项创造性的工作。设计工程师不仅在工作上要有创造性,还必须在机械制图、运动学、工程材料、材料力学和机械制造工艺学等方面具有深厚的基础知识。 Machine Design The complete design of a machine is a complex process. The machine design is a creative work. Project engineer not only must have the creativity in the work, but also must in aspect and so on mechanical drawing, kinematics, engineerig material, materials mechanics and machine manufacture technology has the deep elementary knowledge. 任何产品在设计时第一步就是选择产品每个部分的构成材料。许多的材料被今天的设计师所使用。对产品的功能,它的外观、材料的成本、制造的成本作出必要的选择是十分重要的。对材料的特性必须事先作出仔细的评估。 One of the first steps in the design of any product is to select the material from which each part is to be made. Numerous materials are available to today's designers. The function of the product, its appearance, the cost of the material, and the cost of fabrication are important in making a selection. A careful evaluation of the properties of a. material must be made prior to any calculations. 仔细精确的计算是必要的,以确保设计的有效性。在任何失败的情况下,最好知道在最初设计中有有缺陷的部件。计算(图纸尺寸)检查是非常重要的。一个小数点的位置放错,就可以导致一个本可以完成的项目失败。设计工作的各个方面都应该检查和复查。 Careful calculations are necessary to ensure the validity of a design. In case of any part failures, it is desirable to know what was done in originally designing the defective components. The checking of calculations (and drawing dimensions) is of utmost importance. The misplacement of one decimal point can ruin an otherwise acceptable project. All aspects of design work should be checked and rechecked. 计算机是一种工具,它能够帮助机械设计师减轻繁琐的计算,并对现有数据提供进一步的分析。互动系统基于计算机的能力,已经使计算机辅助设计(CAD)和计算机辅助制造(CAM)成为了可能。心理学家经常谈论如何使人们适应他们所操作的机器。设计人员的基本职责是努力使机器来适应人们。这并不是一项容易的工作,因为实际上并不存在着一个对所有人来说都是最优的操作范围和操作

机械图纸英语翻译

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机械专业英文翻译 Company number:【WTUT-WT88Y-W8BBGB-BWYTT-19998】

启动轴 starting axle 启动齿轮starting gear 启动棘轮 starting ratchet wheel 复位弹簧 restoring, pull back spring 弹簧座 spring seating 摩擦簧friction spring 推力垫圈 thrust washer 轴挡圈axle bumper ring 下料 filling 切断 cut 滚齿机 gear-hobbing machine 剪料机 material-shearing machine 车床 lathe 拉床 broaching machine 垂直度 verticality, vertical extent 平行度 parallelism同 心度 homocentricity 位置度 position 拉伤 pulling damage 碰伤 bumping damage 缺陷 deficiency 严重缺陷 severe deficiency 摩擦力 friction 扭距 twist 滑动 glide 滚动 roll 打滑 skid 脱不开 can’t seperate 不复位 can’t restore 直径 diameter M值 = 跨棒距 test rod span 公法线 common normal line 弹性 elasticity 频率特性 frequency characteristic 误差 error 响应 response 定位 allocation 机床夹具 jig 动力学 dynamic 运动学 kinematic 静力学 static 分析力学 analyse mechanics 拉伸 pulling 压缩 hitting 机床 machine tool 刀具 cutter 摩擦 friction 联结 link 传动 drive/transmission 轴 shaft 剪切 shear 扭转 twist 弯曲应力 bending stress 三相交流电 three-phase AC 磁路 magnetic circles 变压器 transformer 异步电动机 asynchronous motor 几何形状 geometrical 精度 precision 正弦形的 sinusoid 交流电路 AC circuit 机械加工余量 machining allowance 变形力 deforming force 变形 deformation 电路 circuit 半导体元件 semiconductor element 拉孔 broaching 装配 assembling 加工 machining 液压 hydraulic pressure 切线 tangent 机电一体化 mechanotronics mechanical-electrical integration 稳定性 stability 介质 medium 液压驱动泵 fluid clutch 液压泵 hydraulic pump 阀门 valve 失效 invalidation 强度 intensity 载荷 load 应力 stress 安全系数 safty factor 可靠性 reliability 螺纹 thread 螺旋 helix 键 spline 销 pin 滚动轴承 rolling bearing 滑动轴承 sliding bearing 弹簧 spring 制动器 arrester brake 十字结联轴节 crosshead 联轴器 coupling 链 chain 皮带 strap 精加工 finish machining 粗加工 rough machining 变速箱体 gearbox casing 腐蚀 rust 氧化 oxidation 磨损 wear 耐用度 durability 机械制图 Mechanical drawing 投影 projection 视图 view 剖视图 profile chart 标准件 standard component 零件图 part drawing 装配图 assembly drawing 尺寸标注 size marking 技术要求 technical requirements 刚度 rigidity 内力 internal force 位移 displacement 截面 section 疲劳极限 fatigue limit 断裂 fracture 塑性变形 plastic distortion 脆性材料 brittleness material 刚度准则 rigidity criterion 垫圈 washer 垫片 spacer 直齿圆柱齿轮 straight toothed spur gear 斜齿圆柱齿轮 helical-spur gear 直齿锥齿轮 straight bevel gear 运动简图 kinematic sketch 齿轮齿条 pinion and rack 蜗杆蜗轮 worm and worm gear 虚约束 passive constraint 曲柄 crank 摇杆 racker 凸轮 cams 反馈 feedback 发生器 generator

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FEMALE: 内扣(母扣) MALE: 外扣(公扣) 偏心轴eccentric shaft 销轴PIN 开口销COTTER PIN 螺杆screw 紧定螺钉SET SCREW 圆螺母ROUND NUT

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机械类-英文翻译

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In many of the problem thus far , the student has been asked to disregard or neglect friction . Actually , friction is present to some degree whenever two parts are in contact and move on each other. The term friction refers to the resistance of two or more parts to movement. Friction is harmful or valuable depending upon where it occurs. friction is necessary for fastening devices such as screws and rivets which depend upon friction to hold the fastener and the parts together. Belt drivers, brakes, and tires are additional applications where friction is necessary. The friction of moving parts in a machine is harmful because it reduces the mechanical advantage of the device. The heat produced by friction is lost energy because no work takes place. Also , greater power is required to overcome the increased friction. Heat is destructive in that it causes expansion. Expansion may cause a bearing or sliding surface to fit tighter. If a great enough pressure builds up because made from low temperature materials may melt. There are three types of friction which must be overcome in moving parts: (1)starting, (2)sliding, and(3)rolling. Starting

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