Fabricating a 3 point linkage weight frame
99,601
Published 2024-03-10
I design the whole thing in Onshape first before I start.
I then cnc plasma cut out the parts, these are cut from 15mm plate. Then main piece is pressed to shape with the press brake.
I cut some 80x80x6 box section to use as the frame: The main beam, the upright and 2 pieces cut at a 45degree angle.
Everything needs a quick sand down and clean up before assembly.
The main beam is slid through the piece of 15mm that was pressed, the 2 extra braces are also put into place and tacked welded, the upright is squared up and tacked and then the two 45degree angle boxes are tacked on.
The bottom link outer plates are tacked on and then the top link brackets.
I decided I’ve got the hole centres between the bottom link and top link too close, so I redesign and plasma out another pair of top link brackets that have a higher hole centre. The old ones are removed and the new ones are tack welded on.
Once I’m happy with how everything is fitted together, I weld everything up.
Before paint, I give the frame and block a degrease and pressure wash off.
The frame is painted with red oxide first and then both are finished in black. Once the paint has dried, I bolt the block to the frame.
Hope you enjoyed the video.
Thanks for watching!
All Comments (21)
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The attention to detail is amazing, turning the box section seams to the back shows tremendous pride in the work, top notch results and I’m loving the snowball logo 👍
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I don't think I've ever seen the principle of "Measure Twice, Cut Once" been done so fastidiously. Nice.
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You would be a great teacher at a Trade School for future fabricators, your design skills and welding kills are second to none. Truly like to watch your fabrication projects. Thank you from Virginia Beach Virginia USA
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As craftsmen it’s inevitable we will make a mistake, it’s how we recover from them. That turned out superb, your customer is going to be very happy. 😊
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Wow! Instead of one shop dog, two chickens are watching your progress.
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Oliver, every time you use the massive break in your shop, I begin to think of where did it come from and what projects it must have completed for the benefit of customers of the shop it was in. Interesting how the simulation feature shows the stress points of the piece. Thanks for the Sunday morning visit.
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Ollie, you are one heck of a fabricator. Direct, to the point and no nonsense! You are Gold. Always enjoy, thanks.
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A great sunday-video and a very nice holder for the weights! I especially Like that you take pride in hiding the weld seams of the square tubing, drives me mad when stuff are just put together with the seams pointing in every direction 😊
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Another great one to enhance our Sunday morning. Thanks. I’m sure I speak for many when I say you don’t need to speed up sections to reduce the time. I’m just as happy watching a one hour video from you as I am a 45 minute one. Putting the box section seams at the back was a nice touch. Cheers Mike and Nicky
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Another amazing fabrication, done with forethought, and pride. A work of functional art. Along with the complete and professional video work, and editing, superb! For some reason, I loved the leaving the wash area shot, and shop arrival shot. The chickens in the shop inspecting the fire extinguisher humor was spot on.
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Love it how you leave in your little mistakes. Someone I do work for makes out they have never got anything wrong. It gets you down when you are always getting told that you are wrong
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Hopefully the sun will shine for at least a week this summer above the Snowball Engineering Metal Magic Workshop. I love Finland too !
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35:11 You're looking at von Mises stress analysis. What it's telling you is basically the stress in the material, or the pressure it's being put under (hence it being in Mpa) If the von Mises stress comes in with a maximum of 35Mpa and you're using steel with a tensile strength of 350Mpa you're at 10% of the maximum load the material will take before it bends and stays bent. Basically, if your von Mises exceeds your tensile strength it will bend. Keep a significant safety margin in there. You're also accounting for shock loading as it bounces down the road (you can calculate that too). Note that the colouring may scale to the range of stresses seen, not to what the material you're using can withstand. Bright red might be that 35Mpa, or you might have done horrible things in your design and the maximum is 900Mpa in which case the "good" blue part might still be above the yield point of the material. Just pay attention to the scale basically. You can also use it to predict how much deflection you will see in a component. There will be the option in there somewhere for that, but I don't use onshape, so I have no clue where you would find it. I normally use simscale for FEA and CFD simulations. Do the same thing with your log splitter, you'll see what I was talking about on the last video you did on that.
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We really like the logo. The workshop chickens approve, too. That is another fine piece of engineering/fabrication that you created. We wouldn't expect anything else. Thanks for the excellent video, too.
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I love your skills on the CNC! About fixing your logo: drill two holes through the sprocket, weld it onto the workpiece through these holes and grind the welds flush afterwards.
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Beautifully engineered and executed Ollie. The "tip of the day" for me is how you used a straight edge ruler along the side of your cut off saw to extend the virtual cut line to the far side of the box tubing. Keep up the great work and be safe.
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13k visits and only 2k likes it amazes me what is there not to like about your excellent work from desgn to finish, I bet there are not many who could😇 do what you do. Thanks for letting us into your world,
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Amazing work as always Oliver . Got to admit you are giving Kurtis (cee) a run for his money as my favorite fab channel .
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Another great video, i preferred the sounds of grinding ,weld etc... in the time laps parts over the music.
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You are a perfectionist Oliver with metal fabrication 👍👍👍
