焊接作业健康安全.pptx

1、Welding Health and Safety焊接作业健康安全,Hazards危害性,Welding has both “Apparent” hazards and “Hidden” hazards. Apparent hazards are those which can be easily identified. Hidden hazards are those not seen and often forgotten.焊接分明显的危害和隐藏的危害，明显的危害是容易鉴定而隐藏的危害是不明显而且容易忽略的。Some of these are: Electrical Shock 触电 Ov

2、er exposure to arc radiation 电弧光辐射 Fumes and gasses 有害的烟和气Burns and fire 灼伤和火灾 Compressed gas cylinders 压力容器 Noise 噪音,Electrical Safety电气安全,Electric shock and electrocution are possible hazards with all welding processes.在整个焊接过程中，触电和电击是可能存在的危害。,Electrical Safety电气安全,Fuse or Breaker panel保险丝或者断路面板 Po

3、wer Supply cables电源线Internal parts of the power source电源内部零件,Exposed wires on the welding lead.焊接端面上的裸线 Contact with the electrode and the work piece.电极和工件之间的连接Wet gloves or skin.湿的手套或者外套,The primary side:主要方面:,The secondary side:次级方面:,There are two different areas of concern. 有两个不同的区域需要注意。,Primary

4、side power is normally is high amperage/high voltage. The welder should not work in this area. It should left up to a qualified maintenance person.初级电源通常是高电流/电压,焊工不应工作在这个区域。它应该由一个合格的维护人操作。,Notice:注意：,Electrical Safety电气安全,Question:Which is more dangerous?哪个更危险？AC Current or DC Current？交流电或直流电？,Answe

5、r:In GMAW, AC current is more dangerous.气体保护电弧焊中，交流电是更加危险的。,Electrical Safety电气安全,Work Return Lead vs. Ground. 工作回路引线和接地,The work return lead is often referred to as the ground. 工作回路引线有点像接地,Work return and grounding are two different things. 但是接地和工作回路引线是两种不同的事情。,Electrical Safety电气安全,Grounding is：接地

6、是：,A cable attached to a copper rod driven into the ground.电缆联接铜棒插入地下。Its purpose is to carry away current in case of a transformer fault, power surge, or stray voltage.它的目的将使在变压器故障,电力高峰及短路情况下把电流导入地下。,A Work Return Lead is:工作回路引线是:,A cable attached to the work piece.电缆被连接到工件上。Its purpose is to create a complete circuit for welding.它的目的是使焊接时建立一条完全回路。,Connecting the Work Return lead 连接工作回路引线,Electrical Safety电气安全,Proper connection is very important ，because the welding current will find the easies