Cary L. Brown said:
Not wanting to be "confrontational"...... but you're mistaken on a few points there.
First off... there's no such thing as "stick welding." There are a variety of different welding processes, but there is no process called that. (I know what you mean, but being technically accurate is important when discussing technical matters.)
What you're seeing here is called "resistance welding." Basically, you apply a high-power electric charge to the rod of "fill material" and the opposite charge to the base material. When you touch the rod to the material you're welding, a current flows. The resistance at the point of contact is the highest in the circuit, so that point is where the most heat is generated. The heat at that point is sufficient to melt the fill material and the base material, and the melted material merges.
It's called "fill material" because there's almost always a small gap between two plates or structural elements where you're doing this, so you form a fillet of "new" material at that point.
Here's what a typical welded joint, using this type of method, would look like in cross-section. You can see the "fillet" and you can see the two zones of "recrystalization" on either side... between the effectively untreated base metal. Of course, the delineations aren't nearly so clear-cut in reality... it all pretty much "blends" together... but it gives you the idea at least.
[image]http://img412.imageshack.us/img412/6263/250pxweldedbuttjointxseoc6.png[/image]
For a basic primer on welding, this isn't a bad place to start... though it is JUST a primer...
http://en.wikipedia.org/wiki/Welding
Your comment that this is "old fashioned" and not used anymore is just wrong. It's the most well-understood, most well-developed, most RELIABLE method we currently have. While there has been some work using beam-welding done, and there's even a small amount of "real life" usage of that sort of technology, it's typically used in very small situations (nanotech work). I've used it to make small electrical connections, for instance.
What they'll be using in ~250 years from now is anybody's guess... but it's not unreasonable to assume that they MIGHT still be using the most straightforward process available.
On the other hand... the trailer might be intended to be purely figurative and illustrative.
Thank you for your reply. "Stick Welding" is slang in the welding business, at least in my region and the most technical word we've ever used for it is arc welding. I did some welding for about 3 years and had a state certification. My comments were based on the current ship building industry http://www.appliedthermalsciences.com/Laser_Welding/Laser_Welding.html, and not intended to state that conventional means of welding will be abandoned in the future. I think you're right in stating the trailer is meant to be purely figurative and illustrative, which is the real problem I have with it. However it is just a teaser, and theres no guarantee that scene will even appear int the film. My comments were purely intended to nitpick based on my irrational hatred of Hollywoood and distrust of JJ
.
