专业英语复习
pulleys
序号
词  汇
释  义
1
accurate
精确的
2
alloy
合金
3
aluminum
铝
5
aluminum alloys
铝合金
6
Bearings
轴承
7
Boring machines
镗床
8
cable wire
电缆心线
9
cast iron
铸铁
10
center drill
中心钻
11
chemical erosion
化学腐蚀
12
chucks
夹盘
13
computer-aided design（CAD)
计算机辅助设计
14
conventional machining
常规加工
15
cookware
炊具
16
corrosion resistance
耐腐蚀性
17
coupling
联轴器
18
cutters
刀具
19
cutting edge
切削刃
20
cylinder
圆柱体，气缸
21
density
密度
22
dimension
尺寸，尺度
23
drill press
钻床
24
drilling machine
钻孔机
25
electrical conductivity
导电性
26
electrical discharge
放电
27
electronics
电子学
28
elliptical 
椭圆形
29
engineering drawings
工程图
30
feed motion
进给运动
31
feedback
反馈
32
ferrous
含铁的，铁素体的
33
force
力，力量
34
forge
锻造
35
formability
可成形性
36
fundamental
基本的，根本的
37
hardness
硬度
38
heat treatment
热处理
39
Hydraulic 
液压的
40
lead screws
丝杆
41
lever
杠杆
42
linear motion
直线运动
43
machining property
加工性能
44
machinist
机械师
45
magnetic
有磁性的
46
medium
中等的
47
medium carbon steels
中碳钢
48
milling machines
铣床
49
numerical control
数控
50
odd-shaped
畸形的
51
open-loop control
开环控制
52
printed circuit boards
印刷电路板
53
process 
工序，过程
54
radius 
半径
55
relative motion
相对运动
56
right angle
直角
57
rolling contact bearing
滚动轴承
58
saw
锯
59
scale
比例尺
60
shafts
轴
61
slide
滑块
62
slide valve
滑阀
63
spring
弹簧
64
stiff
硬的
65
stubby
粗而短的
66
surface texture
表面纹理
67
torque
力矩
68
T-square
丁字尺
69
turning
车削
70
wear
磨损
71
wear resistance
耐磨性
72
work-piece
工件

1、Work is the transfer of energy expressed as the product of a force and the distance through Which it’s point of application moves in the direction of the force .
功是能量的转换，表达为力和力的作用点在力的方向上的乘积。
2、The scale is used for determining and measuring different dimensions. A scale can only be used to get dimensions. It shouldn’t be employed as a ruler to draw line.
比例尺用于确定和测量不同的尺寸。比例尺只能用来量取尺寸，不能当做支持画直线使用。
3、The separator keeps the balls evenly spaced and prevent them from touching each other on the sides where their relative velocities are the greatest.
保持架将滚珠均匀的隔开，并防止滚珠在其相对速度最大处相互接触。
4、 The bearing is thus permitted to adjust itself to small amounts of angular misalignment in the assembled shaft and mounting.
因此轴承在安装轴和底座过程中是允许有一定的偏位角的。
5、Gears are direct contact bodies ,operating in pairs ,that transmit motion and force from one rotating shaft to another ,or from shaft to slide (rack) ,by means of successively engaging projections called teeth .
齿轮副是有相互直接接触的齿轮组成，通常成对使用，在齿轮连续啮合的作用下，齿轮将运动和力从一根转轴传递到另一根转轴上，或者将运动从和力从一根轴传递到滑块（齿条）上。
6、The major part of a machine is the mechanical system .And the mechanical system is decomposed into mechanisms ,which can be further decomposed into mechanical components . In this sense, the mechanical components are the fundamental elements of machinery.
机器的主要部分是机械系统，机械系统可以分解成机构，机构又可以进一步分解成机械零件。因此，机械零件是构成机器的基本单元。
7、The speed ratio between the shafts carrying a pair of gears depends upon the numbers of teeth in the gears. For example, if a 20-tooth gear drives a gear of 50 teeth, the smaller gear will have to turn 2.5 times to cause the larger one to make 1 turn.
带齿轮的轴间的传动比取决于齿轮的齿数。比如：一个20齿数的齿轮驱动一个50齿数的齿轮，小齿轮转动2.5圈带动大齿轮转动1圈
8、Rack-and-pinion drives are used where it is desirable to transform the rotary motion of one part into linear motion for other part, or vice versa.
  齿轮齿条可以用来将一个零件的旋转运动转变为另一个零件的直线运动，反之亦然。
9、Numerical control  is a form of programmable automation in which the processing equipment is controlled by means of numbers, letters, and other symbols.
数控是一种可编程自动化的技术，他通过数字、字母和其他符号来控制加工设备。
11、The first successful N/C machine, funded by the Air Force, was demonstrated by the Massachusetts Institute of Technology in 1952.
第一台数控机床是由美国空军资助，并由麻省理工学院1952年演示成功。                                                                       
13、The earliest known reference to gears was circa A.D. 50 by Hero of Alexandria , but they can be traced back to the Greek mechanics of the Alexandrian school in the 3rd century B.C. and were greatly developed by the Greek polymath Archimedes (287–212 B.C.).
已知最早有记载的齿轮大约于公元50年由亚历山大发明，但齿轮的历史可以追索到公元前3世纪古希腊亚历山大学校，后来由阿基米德进行了进一步的改进。   
14、Shafts are mounted in bearings and transmit power through such devices as gears, pulleys, cams and clutches .These devices introduce forces which attempt to bend the shaft ,hence ,the shaft must be rigid enough to prevent overloading of the supporting bearings .
轴安装在轴承中，通过齿轮、皮带轮、凸轮和离合器等传递动力。通过这些零件传递的力可能会使轴发生弯曲变形，因此，轴应该有足够的刚度以防止支承轴承力过大。
15、In this most common form ,the commands refer to positions of a machine tool spindle with respect to the worktable on which the part is fixed.
最常用的指令形式可以使机床刀具主轴位于工作台上的具体位置，工作台是用于固定加工零件的。
1、Center drills are stiff, stubby little drills used to start holes in the end of work-piece.
中心钻是很硬的、粗而短的小型钻头，它用于在工件端面开孔。
2、Digital calipers are used just like dial calipers for making inside and outside measurements accurate to one thousandth of an inch but have a direct LCD digital readout.

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