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concrete metal lathe

by:QY Precision      2019-11-04
I always wanted a large CNC lathe. . .
This is a key element of a large lathe.
Unfortunately, most of the places that sell these lathes want a lot of money in exchange.
After searching the Internet, it was found that people could build a lathe from scratch with concrete and steel scrap.
This is the process of making such a machine.
This lathe was designed to be made in the most rustic conditions using the least amount of tools, but I could use some better manufacturing tools, so I took advantage of them.
With this sentence, I am confident that it is certainly possible if I have to make this beast with a hacksaw and a hand drill!
The end result was a machine that was much more precise than I originally thought and a great machine that upgraded to my mature CNC metal steering monster!
It seems that making Magazine links online is the best repository for information on this trolley bed, but it\'s hard to find.
I have downloaded the full article (
Free at first)
And stick it here to make life easier.
My machine is mainly based on the scale and scale of these plans (
The length of my lathe is reduced to 42\".
The first thing to do is to cut the mold and pour out the main form of the lathe.
This shape is a simple shape that can be cut out easily with a table saw, or a skill saw in this way, but since I can use a large CNC machine, I decided to design the mold with CAD, cut all the required parts (
IGES file attachment).
With the metal parts embedded in concrete, I installed the main bearing bracket and the CNC cutting pipe rack.
It\'s also a simple part of cutting off the horn, but getting into my little CNC makes me fancy.
As the concrete shrinks slowly over time, this is a modification that allows continuous adjustment.
I also attached a rough BOM as the approximate cost of what I purchased.
I have quite a bit of scrap metal and plastic on hand, so I design around what I have.
When the weather in the garage was still below the cold night, I started casting the lathe.
I decided to pour concrete in the basement and then figure out how to move after. . . Stupid.
It is not easy to carry a pound of concrete on a section of stairs.
However, people build spaceships and go into space, so I think I should be able to do that.
A few hours later, I drove the lathe into the garage, using a lot of ropes and pulleys, and there were some extra gaps on the wall.
I added some extra support to the work table in the garage and again used a combination of bricks, jacks and car tires to finally lift the beast up to a new home.
It was warm and I could finish the carriage casting in the garage.
This time I made the form with a table saw and some pieces of wood.
When everything is still being built, metal elements are put into concrete.
The brass is bent into a rough angle (heavy)carriage.
At this point, I can do a more precise calibration of everything and start to actually work to make the lathe work.
After installing the screw of the carriage, I started to build the cross slide.
I have a milling machine so I can do a cross slide with aluminum blocks, which, as I mentioned in the video, is easy to make with Hacksaw, files and drill bits. . .
After this machine, my Hacksaw skills have definitely been upgraded.
I use the screw nut of umw.
I used to use this plastic on an old CNC machine and found that they were holding very low recoil drives for a long time.
Now, if it does not rotate, it will be a lathe with poor functionality.
In this step, I removed an axis from the shelf. . . .
Big black in the picture
I took that black thing and drilled a few holes corresponding to the holes on the pulley.
From there, I can tie everything together and have a reliable way to transmit power to the Chuck.
I used fancy connecting bands because I guess it\'s impossible for me to fix the pulley on the shaft so accurately, but it turns out that I hit the mark perfectly and it\'s true that the pulley is running very fast
If you can put up with the cost, then the chain strap is great.
The motor is nothing more than a 1/2HP furnace motor that works surprisingly well!
The pulley is 300 more than me-
The spindle speed is 400 RPM, which is very suitable for the spiral spacing of this machine.
Once the spindle was able to run under its own power, I decided to process the tool post.
With this building I can now start using a lathe to help build myself.
First, I found the Center on the spindle, wrote down the height, and then ground a solid piece of aluminum to keep the tool at this height.
Again, there are 61 ways to do this, and I built it this way with the materials and tools at hand to meet my needs.
A back plate was cut, trimmed on the spindle and formed to connect the 3-claw Chuck.
I made a little mistake on this part and ended up failing on the positioning board of the cutting spindle.
I\'m going to re-make this part from a thicker aluminum sheet in the future because the 1/4 \"is a bit small for keeping the Chuck completely correct (
Can be seen in the video while turning brass).
I was very impressed by the result of this machine starting!
I still have to go through the process of perfect alignment (
On the whole length)
Grind the slides, rebuild the Chuck board, cast/turn the handwheel and maybe build a cover of some way to protect the exposed lead screws, but this is already a good machine!
The standard rebar I use on this machine means that the wheel goes in and out exactly the opposite of what I used to be. . .
But this will be just a factor when this machine is in full manual mode, as I mentioned earlier, the next step is to convert this creature into full CNC control, stay tuned, thanks for watching! -
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