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1/10 Mining Dump Truck
Hi,
at first some few Words about what and why. I've build a Russian Mining Dump Truck called Belaz 7540. It is the smallest Model with 30 tons payload. In 1/10 that is 20KG weight and 30 kg payload. btw: wich measurement is usual in this forum, metric or imperial? Anyway. Why? Simple. I was tired of my small skills in handling plastics. So i've tried to handle metal. After many errors my skills has risen and little by little i've bought a lathe and a mill for widen my possibilities. So I've learned machining. And I've don't learned something called metal shaping. i.e. with a english wheel. By that, I have to look for simple shaped, edgy Bodies. And here it is https://blog.rb-fotos.de/wp-content/...belaz_7540.jpg Looks simple but it will be complicated in details. Key features: Hydraulic Steering, Rear Drive, two telescopic lift cylinders. Latest Tool in my Shop is a Lampert M280 micro tig welder. And now the build starts. Fortunately i've found a very good parts catalogue with many sketches. Without any sizes but from the tire-size upwards i've take all needed sizes to start. Material will be stainless sheet metal .3 und .5 mm thick. First greater parts are the Backplate and the frame. https://blog.rb-fotos.de/wp-content/...z/img_4034.jpg https://blog.rb-fotos.de/wp-content/...z/img_4052.jpg The frame are just four sheets without any additional internal structures. |
Re: 1/10 Mining Dump Truck
My simple "rules" for a all parts of a build
a) try to make on my own. if it is scale: wonderful. If not: so what. :rolleyes: b) if a) is negative or I'm too lazy for it: buy it. ------ So i've tried to made my own shock absorbers with internal springs. The result made from aluminium. With a minimum lubrication they works as I want up to 20 kg payload. Above this they are compressed, but that will be rare moments in the life of the dumper. https://blog.rb-fotos.de/wp-content/...z/img_4105.jpg on their places https://blog.rb-fotos.de/wp-content/...z/img_4092.jpg |
Re: 1/10 Mining Dump Truck
That's a neat looking truck.
Nice metalwork on the frame. Which welding method are you using? Those massive shocks look really amazing. A large portion of us use Imperial measurements, some Metric, some include both to be inclusive. Use what you're comfortable with 20kg payload dump truck is going to be a very impressive |
Re: 1/10 Mining Dump Truck
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https://blog.rb-fotos.de/wp-content/...z/img_4031.jpg Originated at jewellers and dental technicians. ----------- During a former Project i've built a hydraulic cylinder. The car isn't run anymore so i've used the cylinders body again. A hydraulic steering needs piston rods in both directions. I convert it from https://blog.rb-fotos.de/wp-content/...laz/h06059.jpg to https://blog.rb-fotos.de/wp-content/...z/img_4067.jpg For scale it is way to big, but i need the diameter to get enough pressure for steering. Parallel the work on the trough begins the rough form is easy https://blog.rb-fotos.de/wp-content/...z/img_4169.jpg but the typical beads are an enormous bulk of work https://blog.rb-fotos.de/wp-content/...z/img_4182.jpg https://blog.rb-fotos.de/wp-content/...z/img_4183.jpg an intermediate result https://blog.rb-fotos.de/wp-content/...z/img_4201.jpg ----- 50 kg / 110 lbs total weight? A usual 540 motor will be a bit overwhelmed. From a kind hobby colleague I've get two big 24v motors with very tough planetary gearboxes. side by side with a usual 540 with planetary gearbox https://blog.rb-fotos.de/wp-content/...z/img_4282.jpg |
Re: 1/10 Mining Dump Truck
That's some nice looking work! Looking forward to watching your build progress.
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Re: 1/10 Mining Dump Truck
That's a great start to what I'm sure will be a rewarding project Ralf :cool:
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Re: 1/10 Mining Dump Truck
Nice work Ralf:)
How do you like that Lampert M280? I have the older version M200 and I love it. |
Re: 1/10 Mining Dump Truck
What's the learning curve like on the pulse TIGs? Seams "easier" than tradition TIG welding, but looks can be deceiving when watching experts.
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Re: 1/10 Mining Dump Truck
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@blender: i don't have any other experiences with welding. for me the simpliest material to handle is 1.4301 stainless. and welding with additional wires are still not my thing :o thereby my models are mainly from stainless :rolleyes: |
Re: 1/10 Mining Dump Truck
rear axle. the middle piece from stainless for the flanges for links and suspension.
https://blog.rb-fotos.de/wp-content/...z/img_4324.jpg 50 kg total weight was too much for a usual 1/10 drivetrain but the fat wheels with their 60mm diameter enabled me to built a motor-in-axle drive the half axles are from aluminium 50 mm od. https://blog.rb-fotos.de/wp-content/...z/img_4292.jpg https://blog.rb-fotos.de/wp-content/...z/img_4297.jpg https://blog.rb-fotos.de/wp-content/...z/img_4298.jpg to compare with a usual old scx10/1 axle. https://blog.rb-fotos.de/wp-content/...z/img_4308.jpg the middle part. flanges from 4mm stainless https://blog.rb-fotos.de/wp-content/...z/img_4619.jpg https://blog.rb-fotos.de/wp-content/...z/img_4618.jpg |
Re: 1/10 Mining Dump Truck
The build started in juni '21.
End August '21 i've reached a first milestone. the trough and his bead are provisional welded https://blog.rb-fotos.de/wp-content/...z/img_4615.jpg the rear axle gets her links https://blog.rb-fotos.de/wp-content/...z/img_4676.jpg so the axle is mounted on the frame and a first loading test starts pre weighed 10 kg stones https://blog.rb-fotos.de/wp-content/...z/img_4697.jpg nothing cracked . the shock absorbers moves just a few mm. https://blog.rb-fotos.de/wp-content/...z/img_4698.jpg 20 kg stones https://blog.rb-fotos.de/wp-content/...z/img_4699.jpg nothing cracked . the shock absorbers moves just a few more mm. https://blog.rb-fotos.de/wp-content/...z/img_4700.jpg 30 kg stones. maximum payload is reached https://blog.rb-fotos.de/wp-content/...z/img_4701.jpg nothing cracked . the shock absorbers down. https://blog.rb-fotos.de/wp-content/...z/img_4702.jpg some manual flexing works well too. Now I've knew, that all the main components will work on full payload. At this point i'm very pleased with the build so far. |
Re: 1/10 Mining Dump Truck
Very interesting build, will be quite fun to watch your progress. Sounds like you got into this hobby for the same reason I did, learn new methods and techniques. Keep up the great work and post often.
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Re: 1/10 Mining Dump Truck
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-------- After this Milestone, I've got the motivation back to weld all the beads on the trough (endless small sparks in .8 second rythm) and improve the strength of the frame. https://blog.rb-fotos.de/wp-content/...z/img_4710.jpg https://blog.rb-fotos.de/wp-content/...z/img_4711.jpg Frame and struts are real scale. Always fascinating what a few pieces of sheet metal doing with the stability. Meanwhile the tires arrived. Bespoked fabricated. Full, hard Rubber. https://blog.rb-fotos.de/wp-content/...z/img_4772.jpg The enormous wheigth... https://blog.rb-fotos.de/wp-content/...z/img_4771.jpg .... result in exact 8 kg for the completed rear axle. I think it looks quiet nice https://blog.rb-fotos.de/wp-content/...z/img_4778.jpg rims made https://blog.rb-fotos.de/wp-content/...z/img_4806.jpg and a little stack of wheel caps too https://blog.rb-fotos.de/wp-content/...z/img_4834.jpg https://blog.rb-fotos.de/wp-content/...z/img_4840.jpg As a little intermezzo the non-functional fuel-tank was done https://blog.rb-fotos.de/wp-content/...z/img_4866.jpg https://blog.rb-fotos.de/wp-content/...z/img_4872.jpg https://blog.rb-fotos.de/wp-content/...z/img_4885.jpg |
Re: 1/10 Mining Dump Truck
Very nice fabrication! That is one solid looking truck!
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Re: 1/10 Mining Dump Truck
Thank you.
Making the front axle was much more complicated as the rear axle. Due to the great weight i need a real brake. the esc hillbreak wasn't enough to hold the little monster. The motors in the rear axle prohibit any break in them. Ergo the front axles must have breaks. The original has drum brakes. Consequently I plan my first drum brake in my life. That was a real exciting phase of the build. The axles body is from stainless 30mmx3 to hold the steering cylinder, three links and the panhard. The space looks wide but, as usual, at least I've to fight for every mm. The c hubs are made from aluminium. All sizes and shapes, except the hydraulic cylinder, are scale. https://blog.rb-fotos.de/wp-content/...z/img_4905.jpg the c-hubs gets 3° tilt to prevent understeering https://blog.rb-fotos.de/wp-content/...z/img_4921.jpg https://blog.rb-fotos.de/wp-content/...z/img_4922.jpg https://blog.rb-fotos.de/wp-content/...z/img_4931.jpg https://blog.rb-fotos.de/wp-content/...z/img_4933.jpg https://blog.rb-fotos.de/wp-content/...z/img_4938.jpg https://blog.rb-fotos.de/wp-content/...z/img_4940.jpg https://blog.rb-fotos.de/wp-content/...z/img_4941.jpg Flanges are from 4mm stainless.... https://blog.rb-fotos.de/wp-content/...z/img_4992.jpg ....or some more mm :D https://blog.rb-fotos.de/wp-content/...z/img_4998.jpg Links done https://blog.rb-fotos.de/wp-content/...z/img_5026.jpg https://blog.rb-fotos.de/wp-content/...z/img_5027.jpg https://blog.rb-fotos.de/wp-content/...z/img_5028.jpg https://blog.rb-fotos.de/wp-content/...z/img_5029.jpg overview and end of the simple part of the axle https://blog.rb-fotos.de/wp-content/...z/img_5030.jpg |
Re: 1/10 Mining Dump Truck
Nice work , you should be proud of yourself.
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Re: 1/10 Mining Dump Truck
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------------- The complicated parts of the front axles needed intensely research and planning time. Enough time for painting. Not my favourite task. But sometimes it has to be https://blog.rb-fotos.de/wp-content/...z/img_5172.jpg https://blog.rb-fotos.de/wp-content/...z/img_5173.jpg Bored from painting, i've made the baseplate for the Front (1mm stainless) https://blog.rb-fotos.de/wp-content/...z/img_5182.jpg https://blog.rb-fotos.de/wp-content/...z/img_5207.jpg https://blog.rb-fotos.de/wp-content/...z/img_5208.jpg Planning has closed and the work begins. Milling the Joints from stainless https://blog.rb-fotos.de/wp-content/...z/img_5145.jpg After some tests about steering radius etc i've to shorten the steering cylinder. So i've take the opportunitiy and build it a bit more scale. later you will see nothing from it, but i know, it's almost scale. https://blog.rb-fotos.de/wp-content/...z/img_5185.jpg changed cylinder needs a changed flange. from https://blog.rb-fotos.de/wp-content/...z/img_5192.jpg to https://blog.rb-fotos.de/wp-content/...z/img_5191.jpg at least mounted and covered from a heavy duty skid plate https://blog.rb-fotos.de/wp-content/...z/img_5193.jpg |
Re: 1/10 Mining Dump Truck
I always enjoy seeing machine work photos, especially like seeing the work holding solutions. Jim
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Re: 1/10 Mining Dump Truck
Drum Brakes.
some stainless sheet , 3mm thick, aluminium for the drums and some 6x1 stainless pipes https://blog.rb-fotos.de/wp-content/...z/img_5250.jpg the square sheets are turning into round and welded together with the pipes https://blog.rb-fotos.de/wp-content/...z/img_5278.jpg welded onto the joints https://blog.rb-fotos.de/wp-content/...z/img_5286.jpg first tests. all things going well. https://blog.rb-fotos.de/wp-content/...z/img_5288.jpg https://blog.rb-fotos.de/wp-content/...z/img_5289.jpg i need stops on the axles to prevent the drum from contact with the baseplate a lack of suitable stainless washers forces me to made my own small pieces of a 1mm sheet https://blog.rb-fotos.de/wp-content/...z/img_5292.jpg turned together to the od https://blog.rb-fotos.de/wp-content/...z/img_5293.jpg et voila https://blog.rb-fotos.de/wp-content/...z/img_5294.jpg welded on position https://blog.rb-fotos.de/wp-content/...z/img_5296.jpg in the their front , the drums has holes to hold two bearing and a spacer. in the back the big hole for the brake pad holders https://blog.rb-fotos.de/wp-content/...z/img_5279.jpg put on the axle, the drum fits well and has no contact. the double bearings are strong enough to avoid tilting. https://blog.rb-fotos.de/wp-content/...z/img_5297.jpg A good start into this chapter. |
Re: 1/10 Mining Dump Truck
Drum bakes: Brake pad holders.
aluminium round https://blog.rb-fotos.de/wp-content/...z/img_5504.jpg simple method to hold the round parallel to the middle https://blog.rb-fotos.de/wp-content/...z/img_5505.jpg sawed and milled https://blog.rb-fotos.de/wp-content/...z/img_5526.jpg brass bolts https://blog.rb-fotos.de/wp-content/...z/img_5525.jpg fitted with springs https://blog.rb-fotos.de/wp-content/...z/img_5527.jpg set up https://blog.rb-fotos.de/wp-content/...z/img_5530.jpg https://blog.rb-fotos.de/wp-content/...z/img_5532.jpg a little problem are the brake pads themself. after a lot of research i've found the tip that gasket paper (abil eg) was a pretty simple material https://blog.rb-fotos.de/wp-content/...z/img_5534.jpg and really: it works perfect. mocked up https://blog.rb-fotos.de/wp-content/...z/img_5559.jpg next and last part: bowden cable and the mechanics to activate the breaks. |
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