机械制造专业英语文章
机械市场的建设极大地带动了机械、机电行业的发展,创造了无数的社会财富。下面小编整理了机械制造专业英语文章，希望大家喜欢!
数控车床技术
In addition, the features that typically characterize the NC machining center include the following:
另外数控加工中心的典型特征包括以下方面
(1)Automatic tool-changing capability
(1)自动换刀能力:
A variety of machining operations means that a variety of tools is required.
多种机加工工作一位着需要多种刀具。
The tools are contained on the machine in a tool magazine or drum.
刀具贝安装在刀库或多刀刀库中。
When a tool needs to be changed, the tool drum rotates to the proper position, and an automatic tool changing mechanism, operating under program control, exchanges the tool in the spindle and the tool in the drum.
当一把刀需要被调换时,多刀刀座自动旋转到相应的位置上。自动化的换刀机构。在程序控制下进行,把主轴上需换下的刀和多刀刀座上的刀调换
(2)Automatic workpart positioning
(2)工件的自动定位:
Most machining centers have the capability to rotate the job relative to the spindle, thereby permitting the cutting tool to access four surfaces of the part.
大多数加工中心都可以使工件沿着主轴旋转因此允许刀具达到工件的四个表面
(3)Pallet shuttle
(3)托架滑动装置,平板架:
Another feature is that the machining center has two (or more) separate pallets that can be presented to the cutting tool.
加工中心另一个特点是有两个或多个独立拖板每个拖板都可以调整在刀具上。
While machining is being performed with one pallet in position in front of the tool, the other pallet is in a safe location away from the spindle.
在加工过程中,一个拖板在刀具的前部,另一个拖板在远离主轴的安全位置。
In this way, the operator can unload the finished part from the prior cycle and fixture the raw workpart for the next cycle while machining is being performed on the current workpiece.
这样当机床正在加工当前的零件时。操作人员就可以从上一个工作循环中卸下最终加工好的零件,同时加紧毛坯用于下一个工作循环。
经典机械制造专业英语文章Machining centers are classified as vertical or horizontal.
加工中心可以分为立式和卧式。
The descriptor refers to the orientation of the machine tool spindle.
这是参照机床主轴方向来划分的。
A vertical machining center has its spindle on a vertical axis relative to the worktable, and ahorizontal machining center has its spindle on a horizontal axis.
立式加工中心具有轴线相对工作台垂直的主轴，卧式车床的主轴轴线是水平方向的。
This distinction generally results in a difference in the type of work that requires tool accessfrom the top.
这种区别通常会导致在这些加工中心加工的零件类型不同。
A horizontal machining center is used for cube-shaped parts where tool access can best beachieved on the sides of the cube.
立式加工中心用于以上进刀的平面工作。卧式加工中心用于立体形状，刀具在立体侧面可以进刀。
An example of an NC horizontal machining center, capable of many of the features describedabove, is shown in Fig.2.2.
一台数控卧式加工中心，例子如图2.2 所示，具有上面提到的一些特征。
The success of the machining center has resulted in the development of similar machine toolsfor other metal working processes.
加工中心的成功应用导致了其他类似金属加 工机床的发展。
One example is the turning center, designed as a highly automated and versatile machine toolfor performing turning, facing, drilling, threading, and related operation.
例如，在车削中心，把车削加工设计成一个高度自动化万能机床可以完成车削，刨，钻，螺纹加工和类似的操作.
关于机械制造专业英语文章DNC and CNC
直接数据控制和计算机数字控制
The development of numerical control was a significant achievement in batch and job shopmanufacturing, from both a technological and a commercial viewpoint.
数控的发展在分批生产和小批量生产中有着重要意义，从技术和商业角度来说都有着重要意义
There have been two enhancements and extensions of NC technology, including:
数控有两方面的提高和扩展包括
Direct numerical control
直接数据控制
Computer numerical control
计算机数字控制
Direct numerical control can be defined as a manufacturing system in which a number ofmachines are controlled by a computer through direct connection and in real time.
直接数据控制定义为一个制造系统，一定数量的机床有一台计算机通过直接硬件连线实时控制。
The tape reader is omitted in DNC, thus relieving the system of its least reliable ead of using the tape reader, the part program is transmitted to the machine tool directlyfrom the computer memory.
相应的磁带播放机忽略在直接数控中，这样就消除系统中最不可靠的环节。不用磁带播放机而用电脑信息传给车床。
In principle, one computer can be used to control more than 100 separate machines. (Onecommercial DNC system during the 1970s boasted a control capability of up to 256 machinetools.) The DNC computer is designed to provide instructions to each machine tool on demandWhen the machine needs control commands, they are communicated to it immediately.
原则上说一台计算机可以控制100台独立机器。DNC系统在1970 年称为可控制26 台机床直接数控，DNC电脑设计成在需要的时候提供指令给每一台机床，当机床需要控制指令时，计算机立即发送指令给机床。
