機械製造專業英語文章
機械市場的建設極大地帶動了機械、機電行業的發展,創造了無數的社會財富。下面小編整理了，希望大家喜歡!
品析
數控車床技術
In addition, the features that typically characterize the NC machining center include the following:
另外數控加工中心的典型特徵包括以下方面
***1***Automatic tool-changing capability
***1***自動換刀能力:
A variety of machining operations means that a variety of tools is required.
多種機加工工作一位著需要多種刀具。
The tools are contained on the machine in a tool magazine or drum.
刀具貝安裝在刀庫或多刀刀庫中。
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.
當一把刀需要被調換時,多刀刀座自動旋轉到相應的位置上。自動化的換刀機構。在程式控制下進行,把主軸上需換下的刀和多刀刀座上的刀調換
***2***Automatic workpart positioning
***2***工件的自動定位:
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.
大多數加工中心都可以使工件沿著主軸旋轉因此允許刀具達到工件的四個表面
***3***Pallet shuttle
***3***托架滑動裝置,平板架:
Another feature is that the machining center has two ***or more*** separate pallets that can be presented to the cutting tool.
加工中心另一個特點是有兩個或多個獨立拖板每個拖板都可以調整在刀具上。
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.
在加工過程中,一個拖板在刀具的前部,另一個拖板在遠離主軸的安全位置。
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.
這樣當機床正在加工當前的零件時。操作人員就可以從上一個工作迴圈中卸下最終加工好的零件,同時加緊毛坯用於下一個工作迴圈。
經典
Machining centers are classified as vertical or horizontal.
加工中心可以分為立式和臥式。
The descriptor refers to the orientation of the machine tool spindle.
這是參照機床主軸方向來劃分的。
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.
立式加工中心具有軸線相對工作臺垂直的主軸，臥式車床的主軸軸線是水平方向的。
This distinction generally results in a difference in the type of work that requires tool accessfrom the top.
這種區別通常會導致在這些加工中心加工的零件型別不同。
A horizontal machining center is used for cube-shaped parts where tool access can best beachieved on the sides of the cube.
立式加工中心用於以上進刀的平面工作。臥式加工中心用於立體形狀，刀具在立體側面可以進刀。
An example of an NC horizontal machining center, capable of many of the features describedabove, is shown in Fig.2.2.
一臺數控臥式加工中心，例子如圖2.2 所示，具有上面提到的一些特徵。
The success of the machining center has resulted in the development of similar machine toolsfor other metal working processes.
加工中心的成功應用導致了其他類似金屬加 工機床的發展。
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，在車削中心，把車削加工設計成一個高度自動化萬能機床可以完成車削，刨，鑽，螺紋加工和類似的操作.
關於
DNC and CNC
直接資料控制和計算機數字控制
The development of numerical control was a significant achievement in batch and job shopmanufacturing, from both a technological and a commercial viewpoint.
數控的發展在分批生產和小批量生產中有著重要意義，從技術和商業角度來說都有著重要意義
There have been two enhancements and extensions of NC technology, including:
數控有兩方面的提高和擴充套件包括
Direct numerical control
直接資料控制
Computer numerical control
計算機數字控制
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.
直接資料控制定義為一個製造系統，一定數量的機床有一臺計算機通過直接硬體連線實時控制。
The tape reader is omitted in DNC, thus relieving the system of its least reliable component.Instead of using the tape reader, the part program is transmitted to the machine tool directlyfrom the computer memory.
相應的磁帶播放機忽略在直接數控中，這樣就消除系統中最不可靠的環節。不用磁帶播放機而用電腦資訊傳給車床。
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.
原則上說一臺計算機可以控制100臺獨立機器。DNC系統在1970 年稱為可控制26 臺機床直接數控，DNC電腦設計成在需要的時候提供指令給每一臺機床，當機床需要控制指令時，計算機立即傳送指令給機床。