Reading Special English
Engineering Collage,
Heilongjiang August First Land
Reclamation University
Hu jun
E-mail:hjgj7275@126.com
（一）常见的前缀
3,表示时间，序列关系的前缀
? 1)ante-,anti-,表示“先前，早于，预先”
? antecedent,anticipate,
? 2)ex-,表示“先，故，旧”
? expresident,exhusband
? 3)fore-,表示“在前面，先前，前面”
? forward,forecast,foretell(预言 )
? 4)mid-,medi-,表示“中，中间”
? midnight,midsummer
? 5)post-"表示“在后，后”
? postwar,
? 6)pre-,pri-,表示“在前，事先，预先”
? preheat,prewar,prehistory
? prehistoric civilization
? 7)pro-,表示“在前，先，前”
? prologue(序言、序幕 ),prophet(预言家、先知 )
? 8)re-,表示“再一次，重新”
? retell,rewrite
4,表示比较程度差别关系的前缀
? 1)by-,表示“副，次要的”
? byproduct,bywork(副业 )
? 2)extra-,表示“超越，额外”
? extraordinary,
? 3)hyper- 表示“超过，极度”
? hypersonic(超声波 ),hypertension(高血压 )
? 4)out-,表示“超过，过分”
? outdo(超过 ),outbid(出价过高的人 )
? 5)over-，表示“超过，过度，太”
? overeat,overdress,oversleep
? 6) sub-,suc-,sur-,表示“低，次，副，亚”
? subeditor,subordinate,subtropical(亚热带 )
? 7)super-,sur- 表示“超过”
? supernature,superpower,surplus,surpass
? 8)under-,表示“低劣，低下”
? undersize,undergrown,underproduction(生产不足 )
? 9)vice- 表示“副，次”
? vicepresident,vicechairman
Reading skills of scientific and technical English
? Reading for Main Idea (获取主题思想 )
? 我们可以把获取主题思想的阅读技巧分四步
? 1.辨认主题名词 identify subject word
? 2.找出主题词 find subject word
? 3.获取主题思想 gain main idea
? 4.避免不相关的内容 avoid disrelated content
New Words
? 1,lathe n．车床
vt．用车床加工
? A machine for shaping a piece of material,such as
wood or metal,by rotating it rapidly along its axis while
pressing against a fixed cutting or abrading tool.
?车床：通过压紧一种固定的切割或打磨工具并迅速沿轴线转动的办法
来塑造一件材料（如木头或金属）的机器
? 2,swing (swung) vi．（绕轴心、铰链等）回转、旋转
? 3,spindle n．心轴
? 4,pulley n．滑轮，轱辘，皮带轮
? 5,clamp n．夹钳，夹子
vt．（用夹钳）夹住，夹紧
? 6,taper n．拨销
? 7,reamer n．绞刀，绞床
? 8,saddle n．座板，滑动座架，滑板
? 9,apron n．挡板，机床拖板箱
? 10,tapping n．攻螺丝
? 11,quill n．套管轴
Unit 4 Machine Tools
? The Engine Lathe（普通车床）
? Engine lathe,the versatile engine lathe ranges in size and design
from small bench and speed lathes to large floor types,
? The workpiece may be held between tapered centers and rotated
with the powder spindle by means of a clamping device,or it may
be held in a chuck,or even fixed to a rotating plate,
? When the work is swung between centers,the tailstock is clamped
firmly in place.
普通车床：多用途的车床，其大小和设计多种多样，有小的台式车床、高
速车床，大的落地式车床。
工件支在两个锥形顶尖之间。通过夹紧装置且与主轴一起转动，或者工件
装在夹盘上，甚至可固定在一个转盘上。
当工件在两个顶尖之间转动时，尾轴则保持不动。
? Spindle,a short shaft,It may be slender or
tapered,a spindle is capable of rotating or of
having a body rotate upon it.
? 主轴：主轴是一个较短的轴，可能是细长的，
也可能是锥形的，主轴能转动，或者有一物体
绕其转动。
? Lathe size is determined by the swing and
the length of the bed（ Fig,4-1）．
? The swing is twice the distance from the live
center point of the spindle to the top of the
bed,or the largest diameter that can be
turned over the ways of a lathe．
机床的尺寸是由其可加工工件回转直径和床身长度决定的（如图 1所示），
加工工件回转直径是从是车床心轴中心点到床身顶部距离的两倍。
? Fig4-1 size is indicated by swing and the length of the bed
? For example,a 10-in.lathe will turn a l0-in.diameter
workpiece over the ways,but not over the carriage
cross-feed slide,Sometimes two numbers are used
to indicated swing,such as 17-12．
? The 17-in.swing would be over the bed and the 12-
in,swing over the cross slide．
例如 10英寸的车床可以加工 10英寸的工件，但其尺寸不能超过横向进刀滑座。
有时两个数字被用来表示回转直径，比如 17--12,17英寸回转直径将要超出
床身，而 12英寸回转直径超出了横向进刀滑座。
? The length of the bed includes the part the
headstock rests on．
? It determines also the distance between centers．
床身长度包括安装床头箱部分。它也决定了两中心的距离。
(2) Headstock,a part of a lathe that holds the revolving
spindle and its attachment.
主轴箱：车床的一部分，其上安装有主轴及附件。
Center,one of two tapered metal rods that support work in a lathe or
grinking machine and about or with which the work revolves.
顶尖：车床或磨床上两个锥形金属棒中的一个，它用来支持工件围绕着顶尖
转动，或依靠顶尖转动。
? A typical size might be a 3-foot bed with a
distance of 23 in,between centers．
? Lathe beds are offered in many different
lengths for each available swing size．
典型尺寸是一个 3英尺床身（长度）两中心间距离应是 23
英寸。
对于每种不同回转直径的车床，都可以有许多不同的床
身长度。
? A lathe should have a swing capacity and
distance between centers that is at least 10
percent greater than needed to do any job
that may be required,
车床的回转直径和两中心间的距离至少要比其完成任
何作业所需的尺寸大 10%，
? 标准的车床有不同的设计、不同的类型，也可能是其
回转直径由 9英寸变化到 53英寸。
? 它们通常被分为小型、中型或大型回转径的车床。
? Standard lathes come in a variety of designs
and styles and may have a swing changing
from about 9 to 53 in．
? They are generally classified as small，
medium swing,and heavy duty．
? The bed is the base or foundation of the
lathe,It is a heavy,rigid casting made in one
piece,It is the "backbone" of the lathe and
holds or supports all the other parts．
? 床身是车床的基础部分，它是一体的较重的、
刚性铸件。它是车床的“脊骨”，支撑车床的
所有其它零部件。
? Located on the top of the bed are ways,More
expensive lathes have a combination of V ways and
flat ways,Less expensive lathes have flat ways
only．
? Construction of ways varies according to the make．
? 安装于床身顶部的是导轨。具有,V”形轨和平轨
的组合导轨的车床价格要更贵，而只有平导轨的
车床其价格要相对便宜。
? 导轨的结构依其型式而不同。
? Some builders use ways made of hardened
steel that can be replaced if necessary．
? Others use flamehardened ways that are an
integral part of the bed section．
? 一些车床采用必要可以被替代的硬化了的钢制
导轨；
? 其它车床采用与床身制成一体的烧硬的导轨 。
? The headstock assembly is permanently
fastened to the left end of the lathe．
? It contains the headstock spindle,which is
rotated by gears or by a combination of
gears and pulleys．
床头箱组件设永久地固定于车床的左侧。
它包括齿轮组驱动或齿轮与皮带轮联合驱动的主轴。
? The spindle holds the attachments which,in
turn,hold and turn the workpiece．
? Spindles come in several quality ratings and
are supported in headstocks by three to five
bearings,
? 主轴支撑固定和转动工件的一些附件。主轴有
几种质量规格，在床头箱内有 3-5个轴承支承着
主轴。
? Since the accuracy of the work done on a
lathe depends on the axis of rotation of the
spindle holding the workpiece,the spindle
and all its accessories must be built and
assembled with the greatest possible care．
? 由于机床工作的精度依赖于固定工件的主轴的
旋转同轴度，所以主轴及其附件的制造和安装
必须尽可能地仔细。
? The tailstock can be moved along the bed
ways and clamped in position,It consists of
two castings or main parts．
车床尾座能够沿着床身导轨的运动，并且可固定在
一定的位置，它由两个铸件或主要部件组成。
? The lower part rests directly on the ways，
and the upper part rests on the lower part.
? Adjusting screws hold the parts together．
? 下部的部件直接安装在导轨上，上部的部件装
在下面的部件上。
? 调节螺纹把部件固定在一起。
? The upper casting can be moved toward or away
from the operator to offset the tailstock for taper
turning and to realign the tailstock center for
straight turning．
? The tailstock spindle moves in and out of the
upper casting when the tailstock handwheel is
turned.
? 上面的铸件能够移近或移离操纵者，故可在锥形
车削时调整尾架顶尖，在直线车削时对尾架主轴
进行重对中。当转动尾座手轮时，尾座中心轴可
以从上部铸件中伸缩。
? This spindle has a taper hole into which the dead
center or other tools such as drills and reamers
fit．
? Only tools having the same taper as the tailstock
spindle should be placed in the spindle hole,
? 中心轴有一个锥形孔，钻头或铰刀等工具可以
安装在锥形孔中。
? 只有那些具有与车床尾座中心轴同样锥度的工
具才能装进中心轴孔中。
? To remove tools from the spindle,it is only
necessary to back up on the handwheel until the
spindle end is nearly inside the casting．
? The end of the screw that moves the spindle
loosens the taper shank so it can be removed．
? 若要把工具从中心轴上卸下来，只需转动手轮后退中
心轴，直至中心轴刚刚要进到铸件内部时，移动中心
轴的螺纹端使锥形孔松动。这样可以使工具从中心孔
中退出。
? The carriage consisting of the saddle and
apron is the movable part which slides
between the headstock and tailstock．
? It controls and supports the cutting tool．
? 由滑动底座及拖板箱组成的刀架是可以在床头
箱及车床尾轮间滑动的可移动部件 。
? 它控制和支撑着刀具 。
Drilling Machines
? Drilling machine n.钻孔机,钻床
? abrasive drilling 磨钻
? auger drilling 螺旋钻孔
? centre drilling 中心钻削,中心钻孔
? churn drilling 冲钻,舂钻
? double-row drilling 双条播种,双行播种
? dry drilling 干钻孔
? electric drilling 电钻孔
? electron-beam drilling 电子束钻孔
? laser(hole) drilling 激光打孔
? narrow-row drilling 窄行播种
? offshore drilling 海上钻井
? percussion drilling 【 机 】 冲击钻
? precision drilling精密钻孔
drilling n.演练,操练,训练 ;
钻孔 ;【 采矿 】 钻井 ;[pl.]钻屑 [粉 ]
【 农 】 条播 Drilling machine 条播机
【 纺 】 斜纹布,卡其
drilling adj.尖锐的,辛辣的
drilling taunt about politics 辛辣的政治抨击
? Cutting round holes in metal stock is one of
the most common operations performed in
the machine shop．
? Very few metal pieces go through a factory
without having holes drilled in them．
? 金属半成品钻孔是机械加工车间最普通的操作之
一。
? 在加工过程中，很少有不钻孔的金属件。
? 后序工艺通常根据这些孔来进行定位。在诸如铰孔、
镗孔、锥形扩孔、平底钻孔、攻丝等操作中也都要
用到中心孔来定位（如图 2所示）。
? Later operations are often located by referring to
these holes,Drilling machines are used to produce
most of these holes,They are also used in
operations such as reaming,boring,countersinking，
counterboring,and tapping.Fig.4-2
? 钻孔
? 铰孔
? 镗孔
? 平底钻孔
? 锥形扩孔
? 攻丝
? The size of a drilling machine is expressed in
one or more- of the following four ways：
钻床尺寸由以下四种表达方式中的一种或几
种来表示：
? （ 1） By the diameter of the largest disk that
can be center drilled,An 18-in,drill press，
for example,can drill a hole through the
center of an 18-in,diameter disk．
? 1．新钻中心孔的最大圆盘直径表示。例如,18
英寸压钻能在 18英寸直径圆盘中心钻孔。
? （ 2） By the distance the spindle moves up and
down·
? （ 3） By the maximum distance between the
spindle and table．
? （ 4） By the distance from the column to the
center of the spindle．
? 2．主轴上下移动的距离表示。
? 3.主轴到工作台的最大距离表示。
? 4.由立柱到主轴中心的距离表示。
? The principal parts of the drill press are the
base（ or lower table),column,table,and
head,The heavy metal base and upright
column have the table and drill head
attached．
? 压钻的重要部件是基底（或较低的工作台）、
立柱、工作平台及钻头。较重的金属基底及垂
直立柱使工作平台和钻头相接触。
? The drill head consists of the main operating
parts,including the speed and feed
mechanisms,the motor,the spindle,and
the quill．
? 钻头由几个主要操作部分组成，包括速度控制
机构、进给机构、电动机、中心轴及套筒。
? There are several types of mechanisms used to
control the speed of a drilling machine．
? The simplest arrangement utilizes a belt for
transferring power from a four-step,five-step，
or six-step V pulley located on the motor to a
similar pulley attached to the drill press spindle,
? 有几种控制钻床速度的机构。
? 最简单的装置就是用一根三角带将动力由位于电动
机上的四级、五级或六级,V”形带轮传至与压钻主
轴相联的一个结构相似的带轮上。
? To increase power on some belt and pulley machines,a
countershaft drive is sometimes added．
? Another mechanism used is the variable-speed pulley，
which makes it possible to change the machine’s speed
without stopping it．
? In fact,the speed must only be changed while the
machine is running．
? 为增加带传动的功率，有时需加用中间轴传动。
? 另一种机构是用变速皮带轮，这种机构使机器不用停下来
就可实现变速。
? 事实上，在机器运转时，一定要变速的。
Countershaft,a secondary shaft that is driven by a main
shaft and from which power is supplied to a machine part.
副轴：从动轴，由主动轴带动，将动力传到机器零件上。
? Pulleys of a variable-speed drive are made of
two parts having V-shaped sides．
? By means of an adjusting screw attached to
a crank wheel,one side of the driver pulley
may be opened or spread apart．
? 变速装置的皮带轮由两个具有,V”形侧面的部
件组成。
? 调节曲柄轮上的调整螺钉，主动带轮的一边将
张开。
? As it spreads,the belt moves inward toward the
smaller diameter,producing slower speed in the driven
pulley that has closed to make a larger pulley．
? As the sides of driver pulley are brought together,the
belt is forced outward toward the larger diameter．
? 这时皮带向轮心移动，使主动带轮直径减小，而从动带
轮两侧部件向中间靠近，直径变大，带轮速度降低。
? 当主动带轮的两侧相靠近时，皮带沿径向向外运动，使
带轮直径变大。
? This increases the speed of the driven pulley that
opens to make the smaller pulley（ Fig,4-3）
? 这时从动带轮两侧向外张开，使其直径变小，速度增
加（如图 4-3所示）。
? The feed on most drill presses is hand
controlled with a hand-feed lever．
? An automatic power feed attachment is
available for some drill presses．
? 大多数压钻的进给是通过手动进给杠杆靠手动
实现的。
? 一些压钻有动力自动进给附件。
? The spindle,which rotates and moves the cutting tool
up or down,may have either a taper hole or a threaded
end．
? Small drill presses usually have a threaded or short
taper end on the spindle for attaching a drill chuck,
? 使刀具转动并上下移动的主轴既有锥形孔又有一个螺纹
端孔。
? 小压钻通常在中心轴上有一个螺纹端或短锥端孔用来联
接钻头夹头。
? Most medium-sized floor-type drill presses have
a self-holding（ No.1 or No.2 Morse taper）
hole．
? Taper-shank cutting tools fit directly into this
taper hole．
? 大多数中型落地式压钻都有自保持安装孔（第一
或第二莫式标准锥度）。
? 带锥柄的刀具直接安装到锥孔中。
? Straight-shank cutting tools must be held in a drill
chuck．
? A depth gage and stop,mounted on the quill，
can be set when drilling holes to a certain depth．
? 直柄刀具必须装于钻头夹中。
? 当钻孔至某一深度时，在定位套筒上可以安装深度
规和标点。
? Drill presses are normally equipped with a table that can
be tilted to the right and left．
? Some heavier duty machines,however,have a table
with an oil ring around its edge and often a T slot for
clamping work．
? This type of table cannot be tilted．
? 压钻通常装配一个可以左右偏置的工作平台。然而，一些
重型钻床的工作平台边缘有油环，通常有,T”形槽来移动
和固定工件。这种工作平台不能偏置。
Engineering Collage,
Heilongjiang August First Land
Reclamation University
Hu jun
E-mail:hjgj7275@126.com
（一）常见的前缀
3,表示时间，序列关系的前缀
? 1)ante-,anti-,表示“先前，早于，预先”
? antecedent,anticipate,
? 2)ex-,表示“先，故，旧”
? expresident,exhusband
? 3)fore-,表示“在前面，先前，前面”
? forward,forecast,foretell(预言 )
? 4)mid-,medi-,表示“中，中间”
? midnight,midsummer
? 5)post-"表示“在后，后”
? postwar,
? 6)pre-,pri-,表示“在前，事先，预先”
? preheat,prewar,prehistory
? prehistoric civilization
? 7)pro-,表示“在前，先，前”
? prologue(序言、序幕 ),prophet(预言家、先知 )
? 8)re-,表示“再一次，重新”
? retell,rewrite
4,表示比较程度差别关系的前缀
? 1)by-,表示“副，次要的”
? byproduct,bywork(副业 )
? 2)extra-,表示“超越，额外”
? extraordinary,
? 3)hyper- 表示“超过，极度”
? hypersonic(超声波 ),hypertension(高血压 )
? 4)out-,表示“超过，过分”
? outdo(超过 ),outbid(出价过高的人 )
? 5)over-，表示“超过，过度，太”
? overeat,overdress,oversleep
? 6) sub-,suc-,sur-,表示“低，次，副，亚”
? subeditor,subordinate,subtropical(亚热带 )
? 7)super-,sur- 表示“超过”
? supernature,superpower,surplus,surpass
? 8)under-,表示“低劣，低下”
? undersize,undergrown,underproduction(生产不足 )
? 9)vice- 表示“副，次”
? vicepresident,vicechairman
Reading skills of scientific and technical English
? Reading for Main Idea (获取主题思想 )
? 我们可以把获取主题思想的阅读技巧分四步
? 1.辨认主题名词 identify subject word
? 2.找出主题词 find subject word
? 3.获取主题思想 gain main idea
? 4.避免不相关的内容 avoid disrelated content
New Words
? 1,lathe n．车床
vt．用车床加工
? A machine for shaping a piece of material,such as
wood or metal,by rotating it rapidly along its axis while
pressing against a fixed cutting or abrading tool.
?车床：通过压紧一种固定的切割或打磨工具并迅速沿轴线转动的办法
来塑造一件材料（如木头或金属）的机器
? 2,swing (swung) vi．（绕轴心、铰链等）回转、旋转
? 3,spindle n．心轴
? 4,pulley n．滑轮，轱辘，皮带轮
? 5,clamp n．夹钳，夹子
vt．（用夹钳）夹住，夹紧
? 6,taper n．拨销
? 7,reamer n．绞刀，绞床
? 8,saddle n．座板，滑动座架，滑板
? 9,apron n．挡板，机床拖板箱
? 10,tapping n．攻螺丝
? 11,quill n．套管轴
Unit 4 Machine Tools
? The Engine Lathe（普通车床）
? Engine lathe,the versatile engine lathe ranges in size and design
from small bench and speed lathes to large floor types,
? The workpiece may be held between tapered centers and rotated
with the powder spindle by means of a clamping device,or it may
be held in a chuck,or even fixed to a rotating plate,
? When the work is swung between centers,the tailstock is clamped
firmly in place.
普通车床：多用途的车床，其大小和设计多种多样，有小的台式车床、高
速车床，大的落地式车床。
工件支在两个锥形顶尖之间。通过夹紧装置且与主轴一起转动，或者工件
装在夹盘上，甚至可固定在一个转盘上。
当工件在两个顶尖之间转动时，尾轴则保持不动。
? Spindle,a short shaft,It may be slender or
tapered,a spindle is capable of rotating or of
having a body rotate upon it.
? 主轴：主轴是一个较短的轴，可能是细长的，
也可能是锥形的，主轴能转动，或者有一物体
绕其转动。
? Lathe size is determined by the swing and
the length of the bed（ Fig,4-1）．
? The swing is twice the distance from the live
center point of the spindle to the top of the
bed,or the largest diameter that can be
turned over the ways of a lathe．
机床的尺寸是由其可加工工件回转直径和床身长度决定的（如图 1所示），
加工工件回转直径是从是车床心轴中心点到床身顶部距离的两倍。
? Fig4-1 size is indicated by swing and the length of the bed
? For example,a 10-in.lathe will turn a l0-in.diameter
workpiece over the ways,but not over the carriage
cross-feed slide,Sometimes two numbers are used
to indicated swing,such as 17-12．
? The 17-in.swing would be over the bed and the 12-
in,swing over the cross slide．
例如 10英寸的车床可以加工 10英寸的工件，但其尺寸不能超过横向进刀滑座。
有时两个数字被用来表示回转直径，比如 17--12,17英寸回转直径将要超出
床身，而 12英寸回转直径超出了横向进刀滑座。
? The length of the bed includes the part the
headstock rests on．
? It determines also the distance between centers．
床身长度包括安装床头箱部分。它也决定了两中心的距离。
(2) Headstock,a part of a lathe that holds the revolving
spindle and its attachment.
主轴箱：车床的一部分，其上安装有主轴及附件。
Center,one of two tapered metal rods that support work in a lathe or
grinking machine and about or with which the work revolves.
顶尖：车床或磨床上两个锥形金属棒中的一个，它用来支持工件围绕着顶尖
转动，或依靠顶尖转动。
? A typical size might be a 3-foot bed with a
distance of 23 in,between centers．
? Lathe beds are offered in many different
lengths for each available swing size．
典型尺寸是一个 3英尺床身（长度）两中心间距离应是 23
英寸。
对于每种不同回转直径的车床，都可以有许多不同的床
身长度。
? A lathe should have a swing capacity and
distance between centers that is at least 10
percent greater than needed to do any job
that may be required,
车床的回转直径和两中心间的距离至少要比其完成任
何作业所需的尺寸大 10%，
? 标准的车床有不同的设计、不同的类型，也可能是其
回转直径由 9英寸变化到 53英寸。
? 它们通常被分为小型、中型或大型回转径的车床。
? Standard lathes come in a variety of designs
and styles and may have a swing changing
from about 9 to 53 in．
? They are generally classified as small，
medium swing,and heavy duty．
? The bed is the base or foundation of the
lathe,It is a heavy,rigid casting made in one
piece,It is the "backbone" of the lathe and
holds or supports all the other parts．
? 床身是车床的基础部分，它是一体的较重的、
刚性铸件。它是车床的“脊骨”，支撑车床的
所有其它零部件。
? Located on the top of the bed are ways,More
expensive lathes have a combination of V ways and
flat ways,Less expensive lathes have flat ways
only．
? Construction of ways varies according to the make．
? 安装于床身顶部的是导轨。具有,V”形轨和平轨
的组合导轨的车床价格要更贵，而只有平导轨的
车床其价格要相对便宜。
? 导轨的结构依其型式而不同。
? Some builders use ways made of hardened
steel that can be replaced if necessary．
? Others use flamehardened ways that are an
integral part of the bed section．
? 一些车床采用必要可以被替代的硬化了的钢制
导轨；
? 其它车床采用与床身制成一体的烧硬的导轨 。
? The headstock assembly is permanently
fastened to the left end of the lathe．
? It contains the headstock spindle,which is
rotated by gears or by a combination of
gears and pulleys．
床头箱组件设永久地固定于车床的左侧。
它包括齿轮组驱动或齿轮与皮带轮联合驱动的主轴。
? The spindle holds the attachments which,in
turn,hold and turn the workpiece．
? Spindles come in several quality ratings and
are supported in headstocks by three to five
bearings,
? 主轴支撑固定和转动工件的一些附件。主轴有
几种质量规格，在床头箱内有 3-5个轴承支承着
主轴。
? Since the accuracy of the work done on a
lathe depends on the axis of rotation of the
spindle holding the workpiece,the spindle
and all its accessories must be built and
assembled with the greatest possible care．
? 由于机床工作的精度依赖于固定工件的主轴的
旋转同轴度，所以主轴及其附件的制造和安装
必须尽可能地仔细。
? The tailstock can be moved along the bed
ways and clamped in position,It consists of
two castings or main parts．
车床尾座能够沿着床身导轨的运动，并且可固定在
一定的位置，它由两个铸件或主要部件组成。
? The lower part rests directly on the ways，
and the upper part rests on the lower part.
? Adjusting screws hold the parts together．
? 下部的部件直接安装在导轨上，上部的部件装
在下面的部件上。
? 调节螺纹把部件固定在一起。
? The upper casting can be moved toward or away
from the operator to offset the tailstock for taper
turning and to realign the tailstock center for
straight turning．
? The tailstock spindle moves in and out of the
upper casting when the tailstock handwheel is
turned.
? 上面的铸件能够移近或移离操纵者，故可在锥形
车削时调整尾架顶尖，在直线车削时对尾架主轴
进行重对中。当转动尾座手轮时，尾座中心轴可
以从上部铸件中伸缩。
? This spindle has a taper hole into which the dead
center or other tools such as drills and reamers
fit．
? Only tools having the same taper as the tailstock
spindle should be placed in the spindle hole,
? 中心轴有一个锥形孔，钻头或铰刀等工具可以
安装在锥形孔中。
? 只有那些具有与车床尾座中心轴同样锥度的工
具才能装进中心轴孔中。
? To remove tools from the spindle,it is only
necessary to back up on the handwheel until the
spindle end is nearly inside the casting．
? The end of the screw that moves the spindle
loosens the taper shank so it can be removed．
? 若要把工具从中心轴上卸下来，只需转动手轮后退中
心轴，直至中心轴刚刚要进到铸件内部时，移动中心
轴的螺纹端使锥形孔松动。这样可以使工具从中心孔
中退出。
? The carriage consisting of the saddle and
apron is the movable part which slides
between the headstock and tailstock．
? It controls and supports the cutting tool．
? 由滑动底座及拖板箱组成的刀架是可以在床头
箱及车床尾轮间滑动的可移动部件 。
? 它控制和支撑着刀具 。
Drilling Machines
? Drilling machine n.钻孔机,钻床
? abrasive drilling 磨钻
? auger drilling 螺旋钻孔
? centre drilling 中心钻削,中心钻孔
? churn drilling 冲钻,舂钻
? double-row drilling 双条播种,双行播种
? dry drilling 干钻孔
? electric drilling 电钻孔
? electron-beam drilling 电子束钻孔
? laser(hole) drilling 激光打孔
? narrow-row drilling 窄行播种
? offshore drilling 海上钻井
? percussion drilling 【 机 】 冲击钻
? precision drilling精密钻孔
drilling n.演练,操练,训练 ;
钻孔 ;【 采矿 】 钻井 ;[pl.]钻屑 [粉 ]
【 农 】 条播 Drilling machine 条播机
【 纺 】 斜纹布,卡其
drilling adj.尖锐的,辛辣的
drilling taunt about politics 辛辣的政治抨击
? Cutting round holes in metal stock is one of
the most common operations performed in
the machine shop．
? Very few metal pieces go through a factory
without having holes drilled in them．
? 金属半成品钻孔是机械加工车间最普通的操作之
一。
? 在加工过程中，很少有不钻孔的金属件。
? 后序工艺通常根据这些孔来进行定位。在诸如铰孔、
镗孔、锥形扩孔、平底钻孔、攻丝等操作中也都要
用到中心孔来定位（如图 2所示）。
? Later operations are often located by referring to
these holes,Drilling machines are used to produce
most of these holes,They are also used in
operations such as reaming,boring,countersinking，
counterboring,and tapping.Fig.4-2
? 钻孔
? 铰孔
? 镗孔
? 平底钻孔
? 锥形扩孔
? 攻丝
? The size of a drilling machine is expressed in
one or more- of the following four ways：
钻床尺寸由以下四种表达方式中的一种或几
种来表示：
? （ 1） By the diameter of the largest disk that
can be center drilled,An 18-in,drill press，
for example,can drill a hole through the
center of an 18-in,diameter disk．
? 1．新钻中心孔的最大圆盘直径表示。例如,18
英寸压钻能在 18英寸直径圆盘中心钻孔。
? （ 2） By the distance the spindle moves up and
down·
? （ 3） By the maximum distance between the
spindle and table．
? （ 4） By the distance from the column to the
center of the spindle．
? 2．主轴上下移动的距离表示。
? 3.主轴到工作台的最大距离表示。
? 4.由立柱到主轴中心的距离表示。
? The principal parts of the drill press are the
base（ or lower table),column,table,and
head,The heavy metal base and upright
column have the table and drill head
attached．
? 压钻的重要部件是基底（或较低的工作台）、
立柱、工作平台及钻头。较重的金属基底及垂
直立柱使工作平台和钻头相接触。
? The drill head consists of the main operating
parts,including the speed and feed
mechanisms,the motor,the spindle,and
the quill．
? 钻头由几个主要操作部分组成，包括速度控制
机构、进给机构、电动机、中心轴及套筒。
? There are several types of mechanisms used to
control the speed of a drilling machine．
? The simplest arrangement utilizes a belt for
transferring power from a four-step,five-step，
or six-step V pulley located on the motor to a
similar pulley attached to the drill press spindle,
? 有几种控制钻床速度的机构。
? 最简单的装置就是用一根三角带将动力由位于电动
机上的四级、五级或六级,V”形带轮传至与压钻主
轴相联的一个结构相似的带轮上。
? To increase power on some belt and pulley machines,a
countershaft drive is sometimes added．
? Another mechanism used is the variable-speed pulley，
which makes it possible to change the machine’s speed
without stopping it．
? In fact,the speed must only be changed while the
machine is running．
? 为增加带传动的功率，有时需加用中间轴传动。
? 另一种机构是用变速皮带轮，这种机构使机器不用停下来
就可实现变速。
? 事实上，在机器运转时，一定要变速的。
Countershaft,a secondary shaft that is driven by a main
shaft and from which power is supplied to a machine part.
副轴：从动轴，由主动轴带动，将动力传到机器零件上。
? Pulleys of a variable-speed drive are made of
two parts having V-shaped sides．
? By means of an adjusting screw attached to
a crank wheel,one side of the driver pulley
may be opened or spread apart．
? 变速装置的皮带轮由两个具有,V”形侧面的部
件组成。
? 调节曲柄轮上的调整螺钉，主动带轮的一边将
张开。
? As it spreads,the belt moves inward toward the
smaller diameter,producing slower speed in the driven
pulley that has closed to make a larger pulley．
? As the sides of driver pulley are brought together,the
belt is forced outward toward the larger diameter．
? 这时皮带向轮心移动，使主动带轮直径减小，而从动带
轮两侧部件向中间靠近，直径变大，带轮速度降低。
? 当主动带轮的两侧相靠近时，皮带沿径向向外运动，使
带轮直径变大。
? This increases the speed of the driven pulley that
opens to make the smaller pulley（ Fig,4-3）
? 这时从动带轮两侧向外张开，使其直径变小，速度增
加（如图 4-3所示）。
? The feed on most drill presses is hand
controlled with a hand-feed lever．
? An automatic power feed attachment is
available for some drill presses．
? 大多数压钻的进给是通过手动进给杠杆靠手动
实现的。
? 一些压钻有动力自动进给附件。
? The spindle,which rotates and moves the cutting tool
up or down,may have either a taper hole or a threaded
end．
? Small drill presses usually have a threaded or short
taper end on the spindle for attaching a drill chuck,
? 使刀具转动并上下移动的主轴既有锥形孔又有一个螺纹
端孔。
? 小压钻通常在中心轴上有一个螺纹端或短锥端孔用来联
接钻头夹头。
? Most medium-sized floor-type drill presses have
a self-holding（ No.1 or No.2 Morse taper）
hole．
? Taper-shank cutting tools fit directly into this
taper hole．
? 大多数中型落地式压钻都有自保持安装孔（第一
或第二莫式标准锥度）。
? 带锥柄的刀具直接安装到锥孔中。
? Straight-shank cutting tools must be held in a drill
chuck．
? A depth gage and stop,mounted on the quill，
can be set when drilling holes to a certain depth．
? 直柄刀具必须装于钻头夹中。
? 当钻孔至某一深度时，在定位套筒上可以安装深度
规和标点。
? Drill presses are normally equipped with a table that can
be tilted to the right and left．
? Some heavier duty machines,however,have a table
with an oil ring around its edge and often a T slot for
clamping work．
? This type of table cannot be tilted．
? 压钻通常装配一个可以左右偏置的工作平台。然而，一些
重型钻床的工作平台边缘有油环，通常有,T”形槽来移动
和固定工件。这种工作平台不能偏置。
