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Don't get penisy!
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Apr 28, 2016 09:11
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China vs. Volvo https://twitter.com/Chateau_Margaux/status/725613073881399296
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Apr 28, 2016 10:23
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TheDon01 posted:Was doing some maintenance up on a roof and I look over and see this little guy hanging out where he shouldn't belong. amazing
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Apr 28, 2016 12:45
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Maybe someone stuck it up there as part of a geocache or scavenger hunt or something...
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Apr 28, 2016 12:59
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Kyle Schwarber's old car must've thrown a rod.
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Apr 28, 2016 14:40
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Is there a vape cloud anywhere to be seen? It's probably a WRX conrod 
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Apr 28, 2016 16:34
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Holy poo poo, like a mashed
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Apr 28, 2016 18:31
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"Man, cars would be so much better without safety regulations"
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Apr 28, 2016 18:33
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Hate to burst your bubble guys but there's no way that conrod came out of an engine that way, the rod bearing cap is bolted on still. It was thrown there by someone.EKDS5k posted:Ehhh, ironically things get easier to work with once they hit a certain size and weight: it's futile to try and do it alone on site, so it gets driven into a shop where they just use a forklift to take it off. If it's a fancy shop they even have a special attachment for the forklift so the tire can't fall off while you're driving it around. It was a front tire for me, and the hubs don't stick out past the lug studs, so I got to dick around with it. Fortunately I hadn't jacked it up far enough (since I jacked it up just enough to get the flat tire off), so I rotated it on the ground till the lugs lined up approximately, then slowly jacked it up till the holes lined up and wrestled it on. Still had to lift it about half an inch because I accidentally parked with the flat tire in a small depression so it had to be a little too high to sneak the wheel/tire over the edge of the hole, then lift it up slightly. I was using an HF 3 ton floor jack to lift the frontend of a 20k lb truck, and it was making some horrifying creaking noises the whole time, so I certainly breathed easier once a couple lug nuts were started.
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Apr 28, 2016 19:21
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kastein posted:Hate to burst your bubble guys but there's no way that conrod came out of an engine that way, the rod bearing cap is bolted on still. It was thrown there by someone. Maybe the rotating assembly was ejected from the complete block intact, before the crank pin broke while airborne. And also the wrist pin somehow. Didn't think of that didja smart guy?
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Apr 28, 2016 20:57
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Memento posted:As you said, it's serious dollars for downtime. Aside from scheduled maintenance, they run 24/7. If you're hauling 400 tons of lead/zinc ore at 12%, that's 48 tons of contained metal, which is about $60k per load, wholesale from the mine to the trading house. If you're doing a run once every two hours, and you're off the haul line for 5 hours for a new tyre, welp. Seriously... it doesn't even look broken...
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Apr 28, 2016 21:09
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Memento posted:This is why the sooner they move to driverless haul trucks the better - they have LIDAR systems in the front that would have detected and gone around the Awareness Cone that was on the borehole. I used to work on autonomous haulage systems for very big companies. They're a hilarious / horrifying / awesome mix of guesswork and mad science sometimes, but at their worst they're still infinitely superior in every way to the loving bonehead operators.
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Apr 29, 2016 01:15
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I used to drive an old 84 Volvo 240. I had it parked in front of my house, in the street, and some lady in a new Lexus was texting and crashed into the parked Volvo. It looked a lot like this.
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Apr 29, 2016 02:20
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Big crash a few weeks ago.  here is a link to the security footage of the crash: http://vancouverisland.ctvnews.ca/driver-critical-after-tanker-truck-crash-near-saanich-hotel-1.2812249
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Apr 29, 2016 04:29
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Memento posted:
Someone threw a rod. 
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Apr 29, 2016 04:36
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I swear to God
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Apr 29, 2016 04:38
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litany of gulps posted:I used to drive an old 84 Volvo 240. I had it parked in front of my house, in the street, and some lady in a new Lexus was texting and crashed into the parked Volvo. It looked a lot like this. Old 240s are loving tanks. I hit a deer at 50 and all I had to do was buy a new headlight and wash off the blood and fur.
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Apr 29, 2016 04:40
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eberbs posted:Big crash a few weeks ago. I like how he stumbled out of the vehicle and scratched his head like HUH... how did this happen?!?
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Apr 29, 2016 15:44
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More race car m20 engine failures, amazingly this time it isn't from our car! 
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Apr 29, 2016 16:56
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Looks like evolution in action to me, trying to save weight. You shouldn't technically need that much of middle part right? The car was just trying to shave it down and overdid it.
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Apr 29, 2016 17:02
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NitroSpazzz posted:More race car m20 engine failures, amazingly this time it isn't from our car! Long left hander?
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Apr 29, 2016 21:31
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So this was holding up the track for my garage door 
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Apr 30, 2016 05:29
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I take it there ought to be emphasis on the was Is that actually any weaker in shear, I wonder?
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Apr 30, 2016 08:57
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Slavvy posted:Long left hander? Probably, that's a known problem with the M20. I bought a crank scraper for our car and we run a 1/2 quart high just to prevent this. It's fun because long right handers tend to cause fuel starvation, fixed that with a surge tank.
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Apr 30, 2016 12:06
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FogHelmut posted:So this was holding up the track for my garage door 
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Apr 30, 2016 12:23
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FogHelmut posted:So this was holding up the track for my garage door The springs in my panel lift door scare me. Come to think of it, most things that store potential energy scare me.
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Apr 30, 2016 12:29
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FogHelmut posted:So this was holding up the track for my garage door I can't believe it's enough of a cost savings to forge the threads separately, then tack weld them to the head.
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Apr 30, 2016 18:57
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What even happened there? Sheared off? Twisted off? 
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Apr 30, 2016 19:18
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Javid posted:What even happened there? Sheared off? Twisted off? I have no idea. That was holding the track to that metal bit hanging down from the ceiling. I took it off to be able to swing the track wide a little so I could put up some shelving. It fell apart when I put it back on. Wasn't doing anything crazy, just using a ratchet and the box end of a 1/2 inch combination wrench to tighten it.
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May 1, 2016 02:42
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That's probably a bad weld where the raw material gets joined. Bolts are made from giant rolls of bar stock, and each new roll gets joined to the previous so the machinery runs continuously.
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May 1, 2016 02:47
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Regarding Connecting Rod chat: The little 1ZZ-FE in my shitbox corolla is supposed to be using these Powder Metal, fractured cap connecting rods. http://www.chevelles.com/forums/18-engine/200219-powdered-metal-rods.html http://carbuzzard.com/2011/10/cracked-connecting-rods-technology-you-want-in-an-engine/ Doesn't make a difference in a little barely stressed corolla engine, but I wonder if they end up absolutely destroyed like in the above pic more or less often than forged or cast in a hipo motor. Interested because this is a tech I had not previously heard of.
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May 1, 2016 03:21
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double post mother fucker.
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May 1, 2016 03:23
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Almost everything has fracture split rods nowadays, they're used more for consistency and price across millions of engines than any performance benefit.
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May 1, 2016 03:23
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Slavvy posted:Almost everything has fracture split rods nowadays, they're used more for consistency and price across millions of engines than any performance benefit. 1ZZ Rods are thin little fuckers:  Must be pretty strong.
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May 1, 2016 03:26
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The joke is that Volvo is now Chinese.
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May 1, 2016 08:44
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Reacon posted:The joke is that Volvo is now Chinese. I'm also pretty sure thats a fiat so it should be Superior 5000 year old car rammed by decadent imperialist european car
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May 1, 2016 16:44
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Vanagoon posted:Regarding Connecting Rod chat: I work at a stamping company and we use compressed powdered metal (CPM 10V specifically) for our die plates because it's one of the best combinations of toughness and hardenability you can get. So yes, compressed powdered metals can outperform forged steel, but it depends on the type of metal. The heat treatment process for CPM is sensitive and if not performed properly can result in a weak part. We use salt a bath heat treat as we found it gives better results than inert gas. These dies are used in high speed stamping (700+ strokes per minute) of steel parts, generally around Rockwell B90-B95, while the dies themselves are hardened to Rockwell C61-62. More detail than you probably need, but yes, CPM can be good.
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May 1, 2016 17:24
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Disgruntled Bovine posted:
It's not, actually. I enjoy a good, in depth  explanation.Continue  I know I've bounced off the rev limiter in the aforementioned beater 2000 corolla much more than I should ever admit and it takes it like a champ. Edit: Wanted to note that I beat it so because it's one of the cars saddled with the idiotic 3 speed automatic. Vanagoon fucked around with this message at 00:33 on May 2, 2016 |
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May 1, 2016 19:05
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Disgruntled Bovine posted:More detail than you probably need, but yes, CPM can be good. 
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May 1, 2016 23:40
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| # ? May 20, 2024 11:32 |
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I'm not a metallurgist, or even a tool maker, so it's not really my area, but I've learned a bit about it. I don't know the details for CPM 10v because it's a trademarked material. There's more information than I know about it on the manufacturer's website. http://www.crucible.com/eselector/prodbyapp/tooldie/cpm10vt.html That said, I believe one of the critical factors in any powder metallurgy is the pressure utilized in compacting the material. Either way the results can be pretty spectacular as powder metallurgy is used to make jet turbine blades. It can also result in crap, as it's the most common method used to make cheap gears for low end tools. One interesting example I've seen the results of in person was a roller used for forming steel which a customer had us wire EDM a keyway in the center of. It was a cylinder with a hole down the center, about 18" long with an 8" OD and 4" ID and appeared to be a solid piece of steel but with a band of tungsten carbide covering the middle 12" of the OD flush with the surface, while the ID was steel all the way through. I couldn't figure out how they made it so I asked the customer when they came to pick it up, and they said the band of carbide was made first, then the steel was formed around it from powdered metal using hot isostatic pressing. Basically they suspended the band of carbide inside a can larger than the desired OD, filled it with the powdered steel alloy, then put it into a pressure vessel and heated it to ~1800 degrees while pumping in about 20k psi of argon. This crushed the can, compressing the powdered steel alloy around the carbide cylinder, and fusing it into a solid piece. Disgruntled Bovine fucked around with this message at 03:20 on May 2, 2016 |
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May 2, 2016 03:17
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