机械专业英语
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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。
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Paragraph 3
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.
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。
.
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.
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.
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。
Specialized English
Unit 24 Drilling Operations
.
Paragraph 1
1.Drilling involve源自文库 producing through or blind holes in a workpiece by forcing a tool, which rotates around its axis, against the workpiece.
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. 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。
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.
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。 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 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
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.
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。
.
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.
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.
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。
Specialized English
Unit 24 Drilling Operations
.
Paragraph 1
1.Drilling involve源自文库 producing through or blind holes in a workpiece by forcing a tool, which rotates around its axis, against the workpiece.
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. 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。
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.
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。 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 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).