MIG Welding

                                                                                                Name:__________________

                                                                                                Date:    _________________

                                                                                                Block:__________________

 

1)      What does MIG stand for?    

________________  _________________  ______________

2)      What does GMAW Stand for?

_____________    _______________   _______________   _______________

3)      What is the basic advantage of MIG welding over ARC welding?

_______________________________________________________________________________________________________________________________________________________________________________________________________________

4)      Label Diagram

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 


 

5)      “The current used is DC with reverse polarity which provides deep __________________”

6)      What are the two main controls on the front of the MIG welder? (not on/off switch)     ________________________   __________________________

7)      “It is important to keep a pair of ________________ handy at all times to your MIG welder.”

8)      What is the contact tube, or tip, usually made of?   ____________________

9)      The size of the tip is determined by the size of the __________________.

10)  What does nozzle spray or jell do? 

_______________________________________________________________________________________________________________________________________________________________________________________________________________

11)  What are the two types of smaller MIG welding machines?

_________________________________   _________________________________

12)  “The flux-cored wire machines do not make as _____________________a weld,”

13)  What is the main advantage of flux-cored MIG machines?

_______________________________________________________________________________________________________________________________________________________________________________________________________________

14)  What are the two primary benefits of a gas shielded MIG welder?

______________________________________________

______________________________________________

15)  Name 3 special tips that can be used for very specialized MIG welding situations.

______________________________________________

______________________________________________

______________________________________________

16)  What capacity is the smallest available gas bottle? _________________________

17)  What 3 gasses are talked about in the different shield gas mixtures?

_____________________  _____________________  ____________________

18)  What is the most common de-oxidizer? ______________________________

19)  What kind of wire would you use for aluminum welding?

_________________________________________

20)  A jam up of wire inside the MIG welder is called a “__________ _________”

21)  To prevent this (question 20) you need to make sure the drive rollers can ___________ if the wire welds to the tip.

22)  What are the two torch holding techniques called?

_____________________________    ____________________________

23)  On 1/8” or thicker metals the edges should be _____________________.


 

24)  If you are constantly __________________   _________________  the metal, your heat or voltage setting is too high.

 

25)  Label bead:

 

 

 

 

 

 

 

26)  “warpage is a problem unless you _____________________________________ ________________________________________________________________”

27)  What is the visual defect of the following problems?

A)   Arc length too long:           __________________________________

                                                __________________________________

                                                __________________________________

                                                __________________________________

 

B)   Rust on the metal:  __________________________________

                                                __________________________________

 

C)   Speed too slow:                __________________________________

                                                __________________________________

 

MIG Welding.doc