Hello Mr. Bower! I must tip my hat to you sir! Fine work and craftsmanship! You are from another time and I greatly appreciate watching how you fit up and used all these techniques seamlessly. I have been wondering how to get a good purge on odd things like open racking bread carts(food grade) and you have solved that for me! I am now a maintenance manager of a USDA production plant and have had no formal training I have just been working trades since high school and here we are nearly 15 years later. So, I said that to say this, the things I have learned (including welding in all processes) have been by trial and error. It’s nice to see someone truely just do the work and watch and get to learn! So many times in this video I was just like “WOW” and even clapped a few times! Thanks for the video! Also-what flow rate are you putting in purge blocks? Also, please make a detailed video on the ones you used! Have a wonderful day!

@johnbower

2 жыл бұрын

Greg Fain, Thank you for your comment. The secret to making purging jigs is to get them as close a fit as possible against the back side of the panel being welded, if possible the jig needs to rest against the back of the stainless touching on either side of the joint, but small clearance is needed along the joint itself for weld penetration to form and to ensure argon can purge along the back of the weld area, the joint being welded needs to be close fitting, this helps to contain the purge and makes welding easier and neater. As for purge flow rates this all depends on how close a fit you get the purging jigs and how close a fit the joint is. The simple answer to how big any argon purge flow rate needs to be, is just enough to replace any argon that is escaping from gaps around the jig, you only need to maintain a pocket of argon at the back of the joint to keep oxygen away, if your flow rate is to high it will blow outwards through the joint being welded and cause turbulence with argon flowing from your welding torch, as a guide if you have a very very small amount of purge argon leaking out of the joint ( just enough to barely lift a postage stamp ) then you know you have a full back purge. Note: any back purging jig must not be completely sealed, it must be able to allow some argon to escape to prevent pressure building up when the last part of the joint is being welded, otherwise the molten weld pool will get blown out.

Excellent work John, I love watching your videos..I always learn something !

@johnbower

3 жыл бұрын

Matthew Davis, thanks for the comment

good job!

@johnbower

3 жыл бұрын

Gabe Jackson, thanks for the comment.

hi john, thanks as always for sharing the video. never welded with magnets, those seem to be pretty strong, no effect on the arc?. you have the most useful jigs and purging blocks! ;D hope one day you video a shop tour or show the jigs and blocks.

@johnbower

3 жыл бұрын

Hi peter, thanks for the comment, yes the purging jigs work well, but if you put one of those magnets down in the wrong place it will pick up a load of tools & metal filings and ends up looking like a Christmas tree :(

@thebrokenbone

3 жыл бұрын

@@johnbower haha some strong magnets. i forgot to mention i liked how you put the diamond shape in the bottom of the scoop. :)

Great Video as always John! Are you still using the EWM 220 Triton welder ? Thanks

@johnbower

3 жыл бұрын

Hi Billy, thanks for the comment, yes I still have my EWM welder which I used for this job.

@billywilliams8833

3 жыл бұрын

@@johnbower they are a great machine, I use one myself

Nice work do you manage to back purge off the single bottle or have you got another means

@johnbower

3 жыл бұрын

Digg More, Thanks for the comment, Yes I use a single argon bottle and pressure regulator fitted with two flow control valves, these can be independently adjusted to suit different flow rates both to the welding torch and the purging line.

@diggmore1362

3 жыл бұрын

@@johnbower thanks for the info John I’ve only recently done my first bit of stainless TIG welding . One thing I’ve learnt is without back purging the inside of the weld does not always remain stainless. I made water trough for a bench grinder and some bits of the seam are rusting