英语翻译7、占空比调节电位器旋钮：在交流氩弧焊接时,电流为一正、一反两个方向不断的交替转换,当电流从钨针流向工件时,为正向电流时间,此时钨针发热小,热量集中,有利于焊接.当电流

Question

英语翻译
7、 占空比调节电位器旋钮：在交流氩弧焊接时,电流为一正、一反两个方向不断的交替转换,当电流从钨针流向工件时,为正向电流时间,此时钨针发热小,热量集中,有利于焊接.当电流从工件流向钨针时,为反电流时间,此时能清理工件表面的氧化层,有助于达到良好的焊接效果,但钨针会因严重发热而易烧损,此旋钮为调节正反电流时间比设置,当旋钮到“20%”位置时,正反电流时间各占20%；旋到“80%”位置时,正电流比占到80%.(注：在电流较大时就使用较小的占空比；如200A以上时应选用占空比在30%以下,如电流较小时就应使用较大的占空比；如100A以下最好选用50%以上占空比.)
8、 后吹调节电位器旋钮:在焊接结束之后,工件会因为炽热而被氧化,所以在停止焊接之后应用焊枪吹出的氩气冷却一段时间,此旋钮为调节尾气后吹的时间长短,最长可以达到10秒.
9、 上升调节电位器旋钮:为保证焊接的效果,焊接时要保护气体比电流出来之前先覆盖好工件表面,此旋钮为调节氩气提前的时间.

Answer 1

7、 占空比调节电位器旋钮：在交流氩弧焊接时,电流为一正、一反两个方向不断的交替转换,当电流从钨针流向工件时,为正向电流时间,此时钨针发热小,热量集中,有利于焊接.当电流从工件流向钨针时,为反电流时间,此时能清理工件表面的氧化层,有助于达到良好的焊接效果,但钨针会因严重发热而易烧损,此旋钮为调节正反电流时间比设置,当旋钮到“20%”位置时,正反电流时间各占20%；旋到“80%”位置时,正电流比占到80%.(注：在电流较大时就使用较小的占空比；如200A以上时应选用占空比在30%以下,如电流较小时就应使用较大的占空比；如100A以下最好选用50%以上占空比.)
Duty ratio regulating potentiometer knob:
During alternate argon arc welding,the current is continuously alternating between positive and negative directions.When the current flows from tungsten pin to the welded object,it is positive flow time,at this moment,the heat on the tungsten pin is not very hot but concentrated,suitable for welding.When current flows from the welded object to tungsten pin,it is negative flow time,at this moment,the oxide layer on the surface will be cleared,helping to achieve a good welding effect; however,the tungsten pin will be easily burnt due to over-heating.This knob is to regulate the positive / negative flow time; when the knob is at the “20%” position,both flow times is 20% each; when the knob is at the “80%” position,the positive flow time is 80%.(Note:use smaller duty ratio when the current is strong; e.g.set the duty ratio below 30% when the current is 200A and above,use bigger duty ratio when the current is low,e.g.set the duty ratio above 50% when the current is below 100V.)
8、 后吹调节电位器旋钮:在焊接结束之后,工件会因为炽热而被氧化,所以在停止焊接之后应用焊枪吹出的氩气冷却一段时间,此旋钮为调节尾气后吹的时间长短,最长可以达到10秒.
Final gas blow control potentiometer knob:
At the end of welding,the extreme heat will oxidize the welded object; therefore,it should be cooled down by the argon air blown from the welding torch.This knob is to regulate the length of this blowing time,the longest time shall be 10 seconds.
9、上升调节电位器旋钮:为保证焊接的效果,焊接时要保护气体比电流出来之前先覆盖好工件表面,此旋钮为调节氩气提前的时间.
Elevation control potentiometer knob:
In order to ensure good welding result,at the moment of welding,the argon gas should flow out to cover the surface of the welded object before the electric current.The function of this knob is to regulate the ahead time of the argon gas.