Automatic operation by NC is readily adaptable to the operation of all metalworking machines.

数控自动操作可适用于所有金属切削机床。

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Lathes, milling machines, drill presses, boring machines, grinding machines, tureet punches, flame or wire-cutting machine, welding machines, and even pipe benders are available with numerical controls.

车床、铣床、钻床、镗床、磨床、六角孔冲床、火或线切割机、焊机、甚至弯管机都已有数控型的。

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There are two principal kinds of NC systems: (1)point-to-point and (2)contouring. Point-to-point control systems are simpler than contouring systems.

数控系统有两大类:1)点位;2)轮廓。点位控制系统比轮廓控制系统简单。

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Numerical control instructions may be provided through a keyboard on a machine control unit (MCU), in the form of a punched tape, on magnetic tape, or directly from a computer. The current trend is to provide instructions directly from a computer.

数控指令可通过机器控制装置(MCU)的键盘,以穿孔带、磁带的方式或直接从计算机输入。目前的趋势是用计算机直接输入指令。

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Point-to-point NC system is basically a positioning system. Its primary purpose is to move a tool or workpiece from one programmed point to another.

点位数控系统基本上是一个定位系统,其主要目的是将刀具或工件从一个编程点位移至另一个点位。

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Usually the machine function, such as a drilling operation, is also activated at each point by command from the NC program.

通常,数控程序指令在每一个点位启动机器运转,如钻削加工。

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Point-to-point systems are suitable for hole-machining operations such as drilling, countersinking, counterboring, reaming,boring, and tapping.

点位系统适用于钻孔、锪孔、扩孔、铰孔、镗孔、攻丝等孔加工。

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Hole-punching machines, spotwelding machines, and assembly machines also use point-to-point NC systems.

冲孔机、点焊机及装配机也采用点位数控系统。

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Contouring NC systems can direct the tool or workpiece to move at any angle, and also along curved paths.

轮廓数控系统能将刀具或工件向任一角度,也可沿曲线轨迹移动。

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Many contouring NC machines, such as lathes and vertical milling machines, are of the two-axis type. This type allows continuous-path contours to be machined only in the XY plane.

许多轮廓数控机床,如车床、立式铣床等,是两轴的。这种机床只能在XY面上进行连线轮廓加工。

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Three-axis machines are capable of simultaneous cutting movements in all three dimensional shapes in die and mold cavities.

三轴机床能以冲模和塑模型腔的三维形状同时进行切削加工。

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Machining has evolved from individual machines which, with the aid of man, performed individual processes to machines capable of performing many processes.

切削加工已从人工操作的完成单一工序的单台机器发展到能完成多道工序的机器。

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In 1968, a NC machine was marketed which could automatically change tools so that many different processes could be done on one machine.

一九六八年上市的一台数控机床可以自动地更换刀具,并在一台机床上完成许多工序。

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Such a machine became known as a "machining center"--a machine that can perform a variety of processes and change tools automatically while under programmable control.

这种机床叫做“加工中心”,是一台能够完成多道工序,并能在程控下自动更换刀具的机床。

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The study of machining centers begins with the history of numerical control (NC).

对加工中心的研究是随着数控的发展而开始的。

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NC is a form of programmable automation in which certain functions of the machine tools are controlled by coded instructions.

数控是使机床的某些功能在编码命令控制下的可编程自动化。

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A machining center can automatically select and change as many as 32 preset tools.

一个加工中心能够自动选择和更换多达32把预置刀具。

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The table can move left/right or in/out and the spindle can move up/down or in/out, with positioning accuracy in the range of 0.0003 in. in 40 in. of travel.

工作台可左右或里外移动,轴可上下或里外移动,定位精度在40英寸的移程中小于0.003英寸。

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The machine has automatic tool change and automatic work transfer so that workpiece can be loaded/unloaded while the machining is in process.

由于机床能够自动更换刀具和自动加工转换,工件可在不停机的情况下上机或下机。

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The concept of automatic tool changing has been extended to NCN lathes.

自动更换刀具的概念已扩展到CNC(计算机数控)车床。

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