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数控技术专业英语:数控机床NC程序校验功能(双语)

NC程序正式用于批量加工之前,需要经过一系列校验,以保证机床按指定要求运行。无论什么品牌的机床控制面板,总少不了图1所示的程序校验开关。这些乒乓开关(按一下生效,再按一下失效)正常情况下设为OFF状态。

These ON/OFF switches shown in fig.1 are used to check before actual machining whether the machine operates as specified by the created program. Normally they are set OFF.

程序校验乒乓开关

图1 程序校验乒乓开关

fig.1 program test ON/OFF switches

1程序段删除(BDT)

BDT意为block delete。该开关设为OFF时,含有左斜杠(/)标号的程序段可以全部执行;该开关设为ON时,忽略所有含有“/”标号的程序段执行。

The part program that contains a forward slash symbol (/) can be processed in its entirety or bypassing all blocks containing the slash symbol.

看下面一段程序,当BDT设为ON时,N20这一段将被跳过,情形比如,这是一台铣床,不具备自动换刀功能。

N10 TCP (Tang Caiping’s NC program);

/ N20 T1 D2 M06;

N25 F200 S900 M03 M07;

N30 G0 X100 Y100;

N40 G1 X150;

N50 Y120;

N55 M01;

N60 X100;

N70 Y100;

N80 G00 X0 Y0 M05;

N90 M30;

记住,实际上加工程序中并没有程序段被删除,这个开关处于ON时,带标号的程序段只是被跳过而已,因此“程序段跳过”这个说法更为精确。

Keep in mind that no blocks in the program will actually be deleted – they will be only skipped when the switch is ON. The description ‘block skip’ will be more accurate.

2单程序段(SBK)

SBK意为single block。所有数控零件程序总是按完成某个加工操作所需的任务和指令顺序编写,正常情况下,批量生产时单程序段开关设为OFF,因此程序连续运行。

All CNC part programs are always written sequentially, in the order of tasks and instructions needed to complete certain machining operations. Normally, for full production, the single block switch is set OFF, so the program processing is continuous.

在程序调试过程中将此开关打到ON位置特别有用,因为它使得操作员能够一段一段地运行程序。

Setting the switch to ON position is useful particularly during setup, as it allows the CNC operator to process one block at a time.

3空运行(DRY)

DRY意为dry run。标题“空运行”也可以描述为“零件干式加工”,“干”这个词意思就是没有冷却液的加工。

The subject title ‘dry run’ can also be described as saying ‘machining the part dry’. The word ‘dry’ simply means machining without coolant.

由于大多数金属加工都需要冷却液,术语“干式加工”用于夹具上不装工件的程序调试阶段,因此可以干式加工,就好像不需要冷却液。

As most metal machining will require coolant, the term ‘running the part dry’ is reserved to the program testing stage where there is no part mounted in the fixture, therefore it can be run ‘dry’, as no coolant isrequired.

空运行速度很快,为的就是快速校验程序,节省时间。空运行开关ON时,各轴进给以参数P1410中设定的速度移动,而忽略程编的F速度。

When dry run switch is ON, the axes will move at the dry run feedrate set in the parameter No.1410 which is much faster than the programmed F value. The operation saves much time.

空运行经常和Z轴锁住功能一起使用(两个开关都ON),此时,Z轴被锁在工件上方很近的位置,因此目视刀具轨迹就容易得多。

A common application of dry run is combined with the Z-axis lock, when both switches are turned ON. In this case, the Z-axis is locked a short distance above the part, so visually following the tool path is much easier.

4Z轴锁住(Z AXIS LOCK)

Z轴锁住开关ON时,程序中Z方向不产生任何运动而程序的其余部分正常运行,在此条件下可检查程序。

When the Z-axis lock switch is turned ON,t he program can be checked without any motion along the Z-axis, while the rest of the program is processed normally with full functionality.

使用该开关(ON)时,确认保持在绝对坐标位置,在Z轴锁住开关打回到OFF状态(正常设定状态)之后,仍然是初始的绝对坐标位置。

When using this switch in the ON mode, make sure your ABS (absolute) position is maintained. The initial ABS position should also be available after the Z-axis lock switch has been turned back to OFF, its normal setting.

这意味着选择Z轴锁住开关时要十分小心,将此开关设回OFF后,记得对Z轴回参考点。

This means that you should be very careful with the Z-axis lock selection and remember to home the axis after setting the switch OFF.

警告

Z轴锁住时,Z轴没有实际移动,而CNC软件在计算位置变化,这时Z的坐标与实际位置不符。当此开关设回OFF后,很可能发生撞刀事故,这是十分可怕的。须用返回参考点的方法,保证机械零点坐标与绝对、相对坐标一致。

5机床锁住(MLK)

MLK意为machine lock。当此开关ON时,所有的机床运动连同相关功能都被禁止,但是显示器上沿每一轴运动的位置在变化,就象刀具在运动一样。

When the switch is in the ON position, all machine motions will be disabled, along with any related activities, but the position along each axis changes on the display as if the tool were moving.

机床锁住经常用来在不产生任何轴运动的情况下验证零件程序。

Locking the CNC machine is often used to verify the part program without actually moving any axes.

警告

选择机床锁住开关时要十分小心,将此开关设回OFF后,必须对各轴回参考点。

6选择停止(OPS)

OPS意为optional stop。当程序中有辅助功能M01时,数控操作员可以将选择停止开关打到ON位置或保留在正常的OFF位置。当此开关ON,执行至M01时,程序运行将停止,要继续执行程序,必须按CYCLE START按钮。

When the miscellaneous function M01 is contained in the part program, the CNC operator may choose to use the optional stop switch by setting it to ON position or leave in the normal OFF position. When M01 is processed with OPS switch turned on, the program processing will stop. To continue with the program processing, it is necessary to press the CYCLE START button.

编程员经常在每把刀具(除最后一把刀)的结尾处编写M01功能,是否执行M01取决于操作员。有几种情形下,选择停止开关很有用:

· 检查刀具磨损和其他缺陷

· 零件尺寸检查

· 临时离开机床

· 非每个零件都需的其他操作

Programmers often place M01 function at the end of each tool, with the possible exception of the last tool. It is up to the CNC operator to decide whether to use it or not. There are a number of situations when the optional stop switch is useful:

· Checking tool for wear and other flaws

· Part dimension check

· Temporary absence from the machine

· …any other activity not required for each part

单程序段和选择停止

大家发现没有?书写中文是不是更节省纸?中文与英文占纸空间大约是1:2,那是不是说汉语更高效呢?我看不见得。

英语长句多,结构复杂,却表达了严密的逻辑关系,是一种精确的语言;中文短句多(写长了中国人不爱看),古文更精练,任凭后人揣摩想象,是一种玄学语言。

语言是思维的表达,中英文一对比,立刻发现东西方思维差别,这也解释了为什么中国科学技术不发达的根源,因为科学技术注重逻辑精密思维。而只有中国才产生了富有神韵的美丽诗词。

最后,友情提醒,在阅读手机屏幕的时候,按住需要翻译的英文部位,点击“选择复制”→“翻译”,就能很快了解词义,练习跟读。

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