数控机床的改造----外文翻译.doc

2.1, microscopic view of the necessity of
From the micro perspective, CNC machine tools than traditional machines have the following prominent superiority, and these advantages are from the NC system includes computer power.
2.1.1 can be processed by conventional machining is not the curve, surface and other complex parts
Because computers are superb computing power can be accurately calculated instantaneous each coordinate axis movement exercise should be instantaneous, it can compound into complex curves and surfaces.
2.1.2 automated processing can be achieved, but also flexible automation to increase machine efficiency than traditional 3 to 7 times.
Because computers are memory and storage capacity, can be imported and stored procedures remember down, and then click procedural requirements to implement the order automatically to achieve automation. CNC machine tool as a replacement procedures, we can achieve another work piece machining automation, so that single pieces and small batch production can be automated, it has been called "flexible automation."
2.1.3 high precision machining parts, the size dispersion of small, easy to assemble, no longer needed "repair."
一、机床数控化改造的必要性
2.1、微观看改造的必要性
从微观上看，数控机床比传统机床有以下突出的优越性，而且这些优越性均来自数控系统所包含的计算机的威力。
2.1.1 可以加工出传统机床加工不出来的曲线、曲面等复杂的零件。
由于计算机有高超的运算能力，可以瞬时准确地计算出每个坐标轴瞬时应该运动的运动量，因此可以复合成复杂的曲线或曲面。
2.1.2 可以实现加工的自动化，而且是柔性自动化，从而效率可比传统机床提高3～7倍。
由于计算机有记忆和存储能力，可以将输入的程序记住和存储下来，然后按程序规定的顺序自动去执行，从而实现自动化。数控机床只要更换一个程序，就可实现另一工件加工的自动化，从而使单件和小批生产得以自动化，故被称为实现了"柔性自动化"。
2.1.3 加工零件的精度高，尺寸分散度小，使装配容易，不再需要"修配"。