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,机电技术专业英语,2,Lesson Twenty,Text,Safety Notes for CNC Machine Operations Safety is always a major concern in a metalcutting Operation. CNC equipment is automated and very fast, and consequently it is a source of hazards. The hazards have to be located and the personnel must be aware of them in order to prevent injuries and damage to the equipment. Main potential hazards include: rotating parts, such as the spindle, the tool in the spindle, chuck, part in the chuck, and the turret with the tools and rotating clamping devices; movable parts, such as the machining center table, lathe slides, tailstock center, and tool carousel; errors in the program such as improper use of the G00 code in conjunction with the wrong coordinate value, which can generate an unexpected rapid motion; an error in setting or changing the offset value, which can result in a collision of the tool with the part or the machine; and a hazardous action of the machine caused by unqualified changes in a proven program.,Safety and Maintenance for CNC Machine,Lesson Twenty,Daily Maintenance 1. Checking the External View (1)Machine oil (cutting oil, lubrication oil) has been scattered onto the servomotor detector or main unit of the NC, or is leaking; (2)Damage is found on the cables of the movable blocks, or the cables are twisted; (3)Filter clogging; (4)A door of the control panel is not open; (5)Ambient vibration. 2. Checking the Inside of the Control Unit Check that the following troubles have been eliminated: (1) Cable connectors are loosened; (2) Installing screws are loosened; (3) Attachment amplifier screws are loosened; (4) The cooling fan operates abnormally; (5) Cable damage.,Lesson Twenty,Fault Diagnosis and Action When a running fault occurs, examine the correct cause to take proper action. To do this, execute the checks below: Checking the Fault Occurrence Status 1. Check the following: (1) When did the fault occur? (2) During what operation did the fault occur? What running mode? 2. Fault Example (1) The power cannot be turned on. Check the following points: (2) The NC unit does not operate when being activated. 3. Alarm Message When the menu key ALARM is pressed, the ALARM/DIAGN screen is displayed. (1) Alarm (2) Stop code (3) Alarm message (4) Operator message,Lesson Twenty,New Words and Expressions,Lesson Twenty,Lesson Twenty,参考译文,数控机床安全操作注意事项 在金属切削操作中安全性一直是特别受关注的。由于计算机数控设备自动化程度高并且速度快,所以它是一个危险源。为了防止人员伤害和对设备的损坏,必须找出存在危险的根源,且操作人员必须提高警惕。主要的潜在危险包括:主轴,主轴内的刀具,卡盘,卡盘里的工件,带着刀具的转塔刀架以及旋转的家具装置;运动部件,如加工中心的工作台,车床滑板,尾架顶尖,多工序旋转托盘;程序错误,如GOO代码的不正确使用而引起的坐标值错误,产生意想不到的快速移动;设置或改变偏移值时出错,可能导致刀具与工件或刀具与机床之间的碰撞;随意地更改已验证的程序,引起机床产生危险动作。 日常维护 1. 外观检查 (1) 伺服电动机,探测器或数控主单元上的机床用油(切削油,润滑油)或者渗漏情况检查。,数控机床的安全和维护,Lesson Twenty,(2) 可移动部件的电缆上有无破伤或电缆胶合情况。 (3) 过滤器堵塞情况检查。 (4) 控制面板的门是否打开检查。 (5) 外部环境震动检查。 2. 检查控制单元内部 检查以下故障是否被排除。 (1) 电缆连接器松动。 (2) 装配螺钉松动。 (3) 固定放大器螺钉松动。 (4) 冷却风扇工作异常。 (5) 电缆损伤。 故障诊断和维护 当发生运行故障时,应找出原因以便采取适当的措施排除。为此,应执行下列检查。 1. 检查故障发生状态 (1) 故障何时发生? (2) 在何种操作过程中发生故障?何种运行方式?,Lesson Twenty,2. 故障举例 (1)电源不能开启时,需检查下列要点。 (2)当数控单元在开启状态下不能操作时,检查下列要点。 3. 警报信息 当按下报警菜单键时,显示ALARM/DIAGN屏幕。 (1)报警。对于每一项操作警报,程序出错,伺服系统报警或系统错误,都显示警报代码、警报编号或警报信息。 (2)停止代码。在自动操作模式里,用代码或错误编号显示自动操作,不能进行或处于停止状态。 (3)警报信息。显示由用户PLC (内置的可编程序控制器) 指定的警报信息。 (4)操作者信息。显示由用户PLC (内置的可编程序控制器) 指定的操作者信息。,谢谢观赏,www.sciencep.com,Thank You !,
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