焊接工程（中-英）

使用注意事顶：

Operation Precautions:

1、焊枪拆卸时应细心，动作不要过猛，拧下下压盖前应先用压缩气体吹除焊枪内残存的焊粉。尽量用手拆卸，不要借助管钳等工具。如下压盖无法用手拧动，可用内径和和下压盖外径相同的开口铜套套住，小心地夹在三爪卡盘上拧松，然后再用手拆下下压盖。

1. When dismantling a torch, be careful not to apply too much force. Prior to unscrewing the lower gland, the remaining powder inside shall be blown off with compressed air. The torch shall be dismantled by hand, without using tools such as pipe wrenches. If the lower gland cannot be unscrewed by hand, the torch shall be covered with an open-end copper sleeve whose inside diameter is the same as the gland’s outside diameter, then this assembly shall be clamped on a three-jaw chuck and loosened carefully until the lower gland is removed by hand.

2、装枪前应确保喷嘴各密封圈处无焊粉粘附，避免损伤密封圈。装下压盖时用手拧紧即可，无需管钳。尽量使下压盖内壁锥面与喷嘴锥面贴合平整紧密，以保证喷嘴密封圈受力均匀。枪装好后用手指按住阴极杆进水口，用嘴吸阳极水电接头进水处检查枪是否密封良好。正常情况下，三分钟内嘴应感觉到枪内负压不变，否则应重新检查各密封圈处是否密封良好。

2. Prior to assembling, make sure that the O-ring position on the nozzle is free of adhered powder, so as to avoid damage to the O-ring. When replacing the lower gland, it is only necessary to tighten it by hand, with no help from a pipe wrench. Try to fit the inner wall conic face of the lower gland on the conic face of the nozzle evenly and tightly, to make sure the nozzle O-ring has been applied with an even force. After having assembled the welding torch, press the water inlet on the cathode rod with a finger, and suck on the water inlet on the anode water-electricity connector with the mouth to check whether the sealing is proper or not. Normally, the mouth should not feel any negative pressure change inside the welding torch for three minutes. Otherwise, re-check all O-rings for proper sealing.

3、检查无误后将枪接上水电缆，水电缆极性和枪阴阳极水电接头相对应，不能接反，否则会烧坏钨极。通水五分钟后分别接通离子气和送粉气，用手指按住喷嘴孔道，然后松开，根据是否有水滴从离子气孔道或送粉孔道喷出检查相应孔道是否有渗漏。然后检查高频火花是否正常。每次高频放电的时间应不长于2-3秒，间隔2-3分钟。正常情况下，高频火花应分布在三分之二孔道园周上。

3. After having checked and found no wrong items, connect the welding torch to the water-cooled cable, and make sure that the electrodes of the water-cooled cable are connected to corresponding electrodes of the water-electricity connector. They must be connected correctly; otherwise there will be burning damage to the tungsten electrode. After having water run for 5 minutes, connect the welding torch to the ionic gas and powder feeding gas respectively, press the nozzle channel with a finger then release, and check for any leakage of corresponding channels by confirming whether there are any water drops spraying out from the ionic gas channel or powder feeding channel. Then, check that the high frequency sparks are normal. Each high frequency discharge should not last for more than 2~3 seconds, and the interval should be within 2~3 minutes. Normally, the high frequency sparks should fill 2/3 of the nozzle channel circumference.

4、手动建立非转移弧，非转移弧电流40-60A。观察非转移弧流焰是否稳定正常。

4. Establish a non-transferred arc manually, and set the arc current at 40-60A. Observe whether the arc flame is steady.

5、非转移弧建立后按“送粉”钮检查送粉是否流畅，若有堵粉现象则需检查送粉器是否漏气。

5. After having established the non-transferred arc, press the POWDER button to see whether the powder is fed smoothly or not. In case of powder blockage, check for any gas leakage on the powder feeder.

6、一切正常后建立转移弧。正常工作时，非转移弧电流在30～60A情况下即能可靠引燃转移弧。若非转移弧在此电流范围内难以顺利建立、或建立后非转移弧焰流不能充分吹出喷嘴，同时转移弧也不能在瞬间引燃，这时需用砂布清理喷嘴孔道内壁，同时打磨钨极尖端。引燃转弧时非弧电流最好不要高于80A，否则应打磨阴极头。

6. If everything is normal, establish a transferred arc. When running normally, at a current of 30~60A, the non-transferred arc is able to ignite the transferred arc. If at this current, it is difficult to establish a non-transferred arc, or the arc flame cannot be blown out of the nozzle after the non-transferred arc has been established, and also the transferred arc cannot be ignited in a short moment, in this case, it is necessary to clean the inner wall of the nozzle channel and polish the tungsten electrode tip with sandpaper. When igniting the transferred arc, it is better to control the non-transferred arc at a current no greater than 80 A, or else, the cathode head must be polished. During the welding, pay attention to whether the transferred arc voltage and current are within normal ranges.