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  #1  
Old 01-28-2016, 04:41 PM
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Default Liebherr R984 1:14

Hi to everybody, my name is Adolfo from the south of Spain, I would like to share with you my machine construction, this project is a big project in those post i show the works of years working, is tired but it´s funny

i have not finish the 3D model yet but i want to machining something! ok, i´ll post a lot of photo and video,as note, and all my major machines are DIY
ok, here we go!

the first piece is a link of the chain







i have to machining 196 links, a preview model


a video of the machining (right link)
http://www.youtube.com/watch?v=7DmqK...ature=youtu.be
https://www.youtube.com/watch?v=7Rv3...m-upload_owner

and the left link
https://www.youtube.com/watch?v=P0Jb...ature=youtu.be









the traction wheel:
i use a cycloid gear inside the wheel cube with a relation on 1:100 and i turn this shaft using a timing pulley with a 1:6 relation --> final relation 1:600


sectional cut





videos
http://www.youtube.com/watch?v=vtx9vAy3h9I
http://www.youtube.com/watch?v=jrk4c-XzaZA







ok, this is the current status , i need to make the pads for the chain, at the first place i thought to machining it, but i have to rotate them in the mill many times, too boring, i had to learn another technique, lost wax casting

the first cast (bronze)






Last edited by tessen; 11-20-2017 at 04:46 AM.
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  #2  
Old 01-28-2016, 04:43 PM
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Default Re: Liebherr R984 1:14

(obviously these are not the final screws)


the second cast (brass)











the third cast (brass)

the third cast was better, i made the pads i need and i do a test cast, to see that this technique is able

the wax test cast


the final cast


my pads cast



Last edited by tessen; 11-20-2017 at 04:47 AM.
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  #3  
Old 01-28-2016, 04:44 PM
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Default Re: Liebherr R984 1:14

Well, these are the most important pieces, now it make a dotted and drill (which has no mystery), one thing that if it could be funny / curious, are the nuts with hex screws that hold the pads to the chain, finally i did it with my cnc router, the pieces were made in brass, nuts are threaded to M2 and measure 3x3mm, totaling 405 nuts, machined with a 1.5mm drill (the champion of end mills)







a little video of the machining
https://www.youtube.com/watch?v=NHkC...ature=youtu.be

and finally .. I could assemble the track







more photos, this is the time of the hubcaps for the traction wheel, made of aluminum
the master piece is made in 2 pieces, one milling and the other are made using laser engraving


after that, both are join


the mold and the wax copies


the result of the casting






salu2!

Last edited by tessen; 11-20-2017 at 04:49 AM.
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  #4  
Old 01-28-2016, 05:28 PM
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Default Re: Liebherr R984 1:14

Fantastic work Tessen, Most of us can only dream making stuff this good.
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Old 01-28-2016, 07:46 PM
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Default Re: Liebherr R984 1:14

Wow, beautiful work!. Please continue to show us the progress.
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  #6  
Old 01-29-2016, 02:54 AM
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Default Re: Liebherr R984 1:14

Is the advantage of a cycloid reduction a thinner package than a planetary? Watching the video of you spinning it fast with a drill, it looks like there may be some vibration to it...
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Old 01-29-2016, 04:39 PM
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Default Re: Liebherr R984 1:14

thanks for comment
i progress too slowly, now i´m making the hydraulic valve block i hope to share the test soon

Lil Giants: cycloidal reduction have many advantages, some are:

- if you turn the output axis, the input axis can´t be move (brake system)
- there are more surface in contac--> can manage bigger loads
- the output axis have a big diameter

in the video there are 2 stages of 1:10 (total 1:100) but this is a first test, now i have 2 stages of 1:15 (total 1:225) in the same place (and could increase the final relation) to obtain this is complex with spur gears (but i don't say you that it can't be done)

on the negative side this gearbox are difficult to machining, nevertheless i´ll i use it on the chain and in the turret turn

regards
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Old 01-30-2016, 02:58 AM
RCKiwi RCKiwi is offline
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Default Re: Liebherr R984 1:14

Very nice work so far Adolfo! Is your CNC mill with 4th axis home made? I bet a clever bloke like you could put a bar feed on it and go lights out? Or has it already got one? Your work on the cycloidal reduction is very interesting! Please keep posting and sharing your progress with us
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  #9  
Old 01-30-2016, 05:04 PM
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Default Re: Liebherr R984 1:14

thanks RCKiwi
yes, all my machines are diy at this moment i have built (all are in my youtube channel)
- laser-plasma cutter
- router with 4 axis
- cnc lathe
- wire EDM cutter
- SLA 3D printer
- fellows gear shaper
- ...
the 4 axis not have a pull bar due to the reduction i had used, the gearhead not have a through bore, for a feeder i need this and automatic lathe chuck, if i have to make thousand of pieces from a rod, maybe i would think about it

i hope posting soon with a little test..

regards
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  #10  
Old 01-31-2016, 06:32 AM
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Default Re: Liebherr R984 1:14

Wow, you have many skills.
Tracks and drives are awesome.
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  #11  
Old 05-02-2016, 04:38 AM
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Default Re: Liebherr R984 1:14

more advanced, the lower structure, all stainless steel 3 mm and 1.5mm










the following photos correspond to the lost wax casting of pieces for support and guides rollers on tracks







and a pair of test of my future valves (for the time, prototypes)
https://www.youtube.com/watch?v=ACX_2GJdTNQ
https://www.youtube.com/watch?v=-big2h1tJiE

salu2! (best regards)

Last edited by tessen; 11-20-2017 at 04:53 AM.
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  #12  
Old 05-02-2016, 09:57 AM
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Default Re: Liebherr R984 1:14

Amazing workmanship and detail!

Ken
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  #13  
Old 05-24-2016, 01:12 PM
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Default Re: Liebherr R984 1:14

thanks sparkycuda

more advances












Last edited by tessen; 11-20-2017 at 04:52 AM.
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  #14  
Old 12-21-2020, 06:35 AM
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Default Re: Liebherr R984 1:14

Hello everyone, the machine is almost finished, here I leave the rest of the development

the last photos and one test video





https://youtu.be/ZSXQkJDTfbQ











https://www.youtube.com/watch?v=DQ55BgwHt-Q

regards
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  #15  
Old 12-21-2020, 06:41 AM
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Default Re: Liebherr R984 1:14

this is the counterweight of the machine, this is only the model 3d printed to obtain the final part from casting
The first thing to decide is the material, in this case I have chosen to make the counterweight, lead, by weight it would be totally out of scale, but I want to give a certain touch of "forcefulness" to the machine, besides, to remove there is always time

next part, letters and details, at this time i thought to use 3d printed part, but sure i have troubles in cast, no way, plan B


the cast








I have to pause.. a little problem


a rebob (i don´t know if is the correct word, a superficial fail) i have to repair, first i have to prepare the surface and after use a epoxy putty to fill the fail and and a lot of sanding by hand...

... or not, better to use the machines




Now time for the details, i have use my diy mill and wire edm










the final look has to be similar like this



a pair of video
https://www.youtube.com/watch?v=BmlNWxqZb-U
https://www.youtube.com/watch?v=pkb8AXyLN8I&t

i have make an useful (util,utile?) to put the pieces in place

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Old 12-21-2020, 06:42 AM
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Default Re: Liebherr R984 1:14

the bucket, this is a pretty piece, made of steel sheets cut with laser












on the inside, it measures 185mm


ok, next phase
i will do the "tooth" and "tooth holder" with lost wax process, but using 3D printer technique (ussing a diy 3D printer), first time, to make the 3D print model (i use different types of resin)










now i use those part to make silicone models to obtain wax parts



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Old 12-21-2020, 06:44 AM
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Default Re: Liebherr R984 1:14

(how easy and fast seen like this hehe)






the pieces welded by brazing







and almost finished (yet not, I have to add minor details)




another piece, the arm
are made of steel ribs cut with laser and welded together with MIG




the previous piece need on both sides spacers, made of brass and using sand casting technique, those part are glued with epoxy to the main body, but it´s not important, once time in place, can´t move






and after machining



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Old 12-21-2020, 06:46 AM
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Default Re: Liebherr R984 1:14

now the part that hold the bucket hydraulic piston (made of brass) in the arm








and all the pieces that form the arm


this part is a rock protector in the lower side of the arm




and the final piece (almost)


These parts are those that articulate the bucket with the arm,
This piece is made of brass, joins the piston with the bucket, some photos of some parts of the machining







and these 2 parts make the bucket pivot on the arm, they are made of steel (I do not like to work with this engine ... it is a factory to produce pins)









and this a presentation of how it´s works



regards
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Old 12-21-2020, 06:49 AM
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Default Re: Liebherr R984 1:14

now i show some minor details





this is the original stairs on the lower superstructure


and here my pieces to scale







the turret turning system
















a little video of the motor and the gearhead

https://youtu.be/6APESpE42aY

and the rest of gearhead



and a video to show how it´s works
https://youtu.be/oIVaSKgdFJg
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  #20  
Old 12-21-2020, 06:53 AM
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Default Re: Liebherr R984 1:14

base for the upper structure
This part is the one that supports the whole upper set, to it is taken both the arm and the counterweight, the base is a 6mm of steel sheet and the most important parts are either groove joints or threaded, photos:






the boom:
It is composed of several pieces, the main structure is made by joining steel sheets of different thicknesses, with them I create an inside skeleton, the pivot points are solid pieces, to complete it i will fill the interior with epoxy and filler to give more consistence , Photos:












reinforcements at the tip of the arm




and the look of the set presented



the following is the joining of the hydraulics ram in the boom, I use a piece of brass and I will mechanize it to shape





this is the set presented




The next piece makes the pivot point of the pistons that move the arm, this piece is taken out of casting brass



Another thing I have done is accentuate the detail of the welds on both the sides of the machine, using copper wire and solder




and one of the last steps would be to fill as previously mentioned with resin and filler to give more rigidity to the set, filling gaps and fixing some internal parts



and here once the resin dries

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