Hello everyone, and thank you in advance for reading.

So, I've been welding as a hobbyist for a few years with a Lincoln MigPak 140. I spent many weeks watching Youtube tutorials on welding, and reading guides before I ever even bought my welder. As such, I can create what I consider to be decent welds. I don't have anyone to share weld photos with, so I don't take any shots of my welds, except for this one photo. Pretty sure the weld was quite a bit too hot there, but the fact is, it fused. It holds.

Or, so I think.

See, all of the educational content I watched taught that "bad" welds were welds which either didn't achieve fusion, due to being too cold, or which had porosity, or which were too hot, and either melted through, or became too flat.

They would reference photos like this, and would draw attention to the cold edge of the bead at the top, showing a lack of fusion into the base material. And they would show cross-sectional views like this to talk about fusion and penetration, and to learn what the profile of a bead should look like.

And so that's what I learned defines a good weld -- the peak of the bead should not be concave, it should be convex, but not pointed or aggressively convex, the toes should blend seamlessly into the base metal, etc.

Question 1

But over my years lurking on this sub, I've seen a lot of talk about how MIG just cannot achieve the same weld strength as TIG, to the point where there are entire categories of products, like roll-cages, in which TIG is nigh-mandatory, and often forced by whatever authority validates the product.

But I don't understand why.

I get that TIG is a far more controlled method of welding than MIG, and that control can obviously translate into quality. But what I'm wondering is: Are TIG welds inherently stronger than MIG welds, or is it that TIG weld***ERS*** are usually more skilled than MIG weld***ERS***, and take their time, and ensure they get better welds?

Another way of phrasing the question is: Assuming that both users are absolute masters of their respective processes, COULD a master MIG welder achieve welds that are every bit as strong as the master TIG welder?

Question 2

My second question is in regards to what penetration and fusion even are.

See, I've cut my own welds in half to

Hoping to put together a cosplay for the big guy but pretty set for the helmet being accurate since it's arguably his most iconic piece. I intend to make it out of aluminium so I just need the dimensions but can't seem to find the right mask.

Any help would be greatly appreciated!

I'm interested in doing a Kickstarter. I need to make 2-6k of an object it is two pieces and needs to be welded together. All of the short run manufacturers that I talked to don't do ultrasonic welding. Does anyone have any suggestions?

https://preview.redd.it/dstk4hvc4xc61.jpg?width=1024&format=pjpg&auto=webp&s=c2be5562607fcccb41ea28a4a98d688c3ac780af

This new version of my Commuter e-Bike was created for three reasons: (1) - the distance of my trips was increased, so I needed a 24.5Ah battery, (2) - I wanted more speed and dynamics, which means I need a hub motor 1000W, (3) – I have already successfully tested in all possible load conditions the mid-drive 250 / 350W bike model, the frame elements of which are also connected by hybrid glue-rivet technology. I kindly ask you to express your opinion and even to criticize.

The prototype of my affordable Commuter e-Bike will allow installing the removable 36 or 48V lithium-ion batteries with 14, 17.5, 21 and 24.5Ah capacities to work with a rear hub motor from 250 to 1000W. Thus, it will be possible to select individually the optimal motor and battery for any task, whether it is short city trips or long country adventures. Samsung 18650 cells with a capacity of 3500mAh will be used for the manufacture of batteries.

The rear hub motor will work in conjunction with a hydraulic system disc brakes with enlarged disc brake rotors and an 8-speed chain transmission system, which will allow to safely move on high-speed sections of suburban roads and effortlessly overcome the inclines that might be encountered on the way. Also, I will always have the opportunity to move not only with pedal assistance but also to use only the throttle, which can save strength and add positive sensations from the trip.

Like my other prototypes, the optimized with the help of CAD simulation patent-pending frame of the new Commuter e-Bike will be fabricated without welding from durable 6061 and 7075 aluminum alloys, so the weight will be about 3kg (6.6lbs), and the weight of the electric bike itself will be 20-26kg (44-57lbs), depending on the selected drive unit and battery capacity.

https://preview.redd.it/6atriyzd4xc61.jpg?width=1024&format=pjpg&auto=webp&s=06050eafe47f33427727747622a6d03f3025c86f

https://preview.redd.it/u6mjkqzd4xc61.jpg?width=1024&format=pjpg&auto=webp&s=b8ba5cd6f9a50b25516dbc92f58545ac9e5d22be

I am building Level 8 Vuman Vengeance Paladin 5/Swashbuckler Rogue 3. Party Undetermined. My stats are 18 dex, 14 con, 14 cha, 12 wis, 10 int, 8 str. I can’t decide on the feat for my Vuman. My goals are high damage and mobility. Thank you in advance, and if you have any advice about feats or anything else, but it in the comments.

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wouldn't it be a faster way to expedite the form 4 process, where you combine the speed of e-form 1 but the performance of a professionally made can?

the manufacturers already cut off cores and weld on new ones as part of warranty repairs anyways, and it seems pretty quick for them.

edit: manufacturer would charge extra for the recoring service, so the total price collected comes out to more or less the price of their production cans, so they wouldn't be losing money on this process. heck they could charge an extra hundred or two for the back-and-forth process, and customers would still be willing to pay for e-form 1 expediency.

Since the announcement of Sony's PSVR, many reviewers have noted the superior comfort of its welding style headband and "flip down" design over the scuba mask style approach that the Oculus and Vive take. Sony appears to have developed this headband iteratively over the course of their other head mounted products, so it looks to be a very nice solution.

Welding masks are quite widely used in industry, the headgear that supports them is widely available, cheap, and well designed to comfortably hold heavy head mounted visors for extended periods of time.

The Vive default head strap is easily removed, and the center attachment point for the visor appears to be pretty straightforward. I have a 3D printer with access to engineering materials. Does anyone think it would be worth the effort to develop and test an adapter that allows the Vive to be used with a welding headband in the same "flip down" style that the PSVR has?