Today's Welding time!

[aarolar]

What sort of amperage does it take for material that heavy?

And - is one pass like this sufficient to make a weld as strong as the material?

These were 3 passed and I was running somewhere between 200 to 250 amps with a lot of preheat of the plate first. It wasn't required to have 100% pen or be super duper strong they were that heavy in order to be machined after welding to be square.

 

[petegoud]

Here's a video of a lift I built a year ago for a small museum in town. We had a problem carrying heavy loads up a flight of stairs that was built about 100 years ago. Since most of our volunteers are senior citizens, who probably wouldn't fair well falling down a flight of stairs that wouldn't even come close to passing a building code today, this is what we came up with. Since this video was made we added a self-closing door. The welding was all tig/mig. The pipes guiding the lift are also supporting the entire structure, they're 1 1/4" pipe. We're using a Harbor Freight 880lb winch. The guides were made out of 3/4" UHMW. So far, a year later, it's been working flawlessly.

20160205 112749 - YouTube

 

[California]

These were 3 passed and I was running somewhere between 200 to 250 amps with a lot of preheat of the plate first.

Thanks. That bead is so smooth it is hard to imagine it was 3 passes.

 

[dragoneggs]

Here's a video of a lift I built a year ago for a small museum in town. We had a problem carrying heavy loads up a flight of stairs that was built about 100 years ago. Since most of our volunteers are senior citizens, who probably wouldn't fair well falling down a flight of stairs that wouldn't even come close to passing a building code today, this is what we came up with. Since this video was made we added a self-closing door. The welding was all tig/mig. The pipes guiding the lift are also supporting the entire structure, they're 1 1/4" pipe. We're using a Harbor Freight 880lb winch. The guides were made out of 3/4" UHMW. So far, a year later, it's been working flawlessly.

20160205 112749 - YouTube

Now that is a different welding project! :thumbsup:

 

[Rustyiron]

Thanks. That bead is so smooth it is hard to imagine it was 3 passes.

Looks like metal colored caulking, beautiful.

 

[Rustyiron]

Here's a rack I just built for the little truck. Been making them lately out of sq. material, so much easier but felt like the challenge of a "classic" pipe reck with all the coping and such.

With a plastic bed, I didn't want to load the sides so it sit's in the bed on the frame location.

 

[Gordon Gould]

This was a fun project I showed before - a chute on my one ton tail gate so I could dump directly into my trailer.









It actually works pretty good

TrailerLoading - YouTube

gg

 

[ArlyA]

toboggan repairs

We have a rescue toboggan we use for hauling cargo in and found it needed some repairs. The front ski assemble was poorly designed and subsequently bent. In the middle photo you can see the round 1/4" plate the manufacturer had used. What you can't see is the cone shape it was bent into. It was replaced with a square piece that's already been welding in which was thicker at 3/8. The original pivot bolt was also increased for 3/4 to 7/8th. In the next photo the assembly is upside down but shows a rib we added. The last one is ours in use.

I welded in the energy business for 15 years. Now just piddle at in our locale high schools metals shop.

 

[Sodo]

Welded a foundation fixture today. 10-inch channel.

Will jack the house up and support it with 2x2x3/16" steel posts on this channel.
The 2x2x3/16" posts will go up to the main floor, to the roof beams
I'll furr out the wall over the steel structure.

Foundation broke loose from the floor slab, and sunken 2 inches.
The foundation has been stabilized by a company that uses "push piers".
It has a 25 year guarantee against further settling.

Had to fill a big gap. I remembered seeing evidence of a burn pile where
the IKEA furniture had left its droppings. Swedish/chinese screw/fastener part has a 2nd life filling the gap in a foundation support fixture weld.

Closed up.

This is pretty thick stuff for 120v. All welded on 120V with a Miller MultiMatic200 (portable suitcase welder). With just a little trouble to make an extension cord I coulda used 240V from a nearby dryer, but decided to just use 120V. It's FINE!
That's a 1/4" drill bit.

 

[PJSprog]

Wife bought new chairs awhile back for our new sunroom. One of them had cracks around the welds for the back legs. I thought I'd give it a go with the new HF DC Inverter and some 1/16" E7014 sticks. I'd gotten some respectable beads practicing on flat scrap at about 55A, so I decided to start there. This chair is constructed of 1/16" steel tube, by the way. I used a steel brush wheel chucked into my 18V Dewalt drill to clean off the powder coat around the welds on both sides. Once I struck an arc on the first side, it burned a hole right through that tube like it was a McDonald's drink straw. :grumpy: So, I turned it down to about 40A, and did nothing but stick the rod. It acted like it wanted to arc a couple of times, but no deal. At about 42A, it finally struck and burned at a reasonable temperature to fill the hole I'd just made and repair the crack. It also heated up the surrounding paint enough to ignite that, too. :fiery:

In the end, the repair was completed. The second side went much better, albeit with some flaming paint there, too. I used the new HF paddle switch grinder to clean up the hideous welds a bit, and cleaned the scorch marks with some Four Monks vinegar cleaner (pretty good stuff). The Wife is looking for some touch-up paint to match now. It's definitely not pretty, but it's fixed.

Edit: for clarity, it's 3/4" tube with 1/16" wall thickness.