welded metal frame desktop cnc

[turpija]

here is fairly small machine intended to be mounted on table
outer dimensions will be about 1x1x1m
and working area is somewhere around 700x700x200mm or slightly bigger than 2x2'

here is visualization from solidworks, missing spindle with mount and table (which hopefully will be a vacuum table sometime in future)


got some metal cut


bevel it a bit


and start cleaning


nice and shiny


parts cut with waterjet


...also needs cleaning


a little bit of assembly


and alot of drilling


this is how lower part should look like, just needs some holes and tapering


next thing on menu will be welding ... so stay tuned

there is a bit more pictures on my website if you wish to take a look ...

[HorridHenry]

I thought mine would be heavy when built but yous must weigh at least 50/60 kilo's?

[louieatienza]

Nice work!

[harryn]

Thanks for posting your build. I looked at your blog and saw the anti - corrosion liquid bath with antikor. There is a company in Belgrade in the anti-corrosion business, but not a lot of information on the liquid itself. Do you happen to know what it is ?

It looks like it both cleans and imparts a rust resisant surface to the steel ?

When I was younger, I used some stuff called "naval jelly" which contains H3PO4 / phosphoric acid. I wonder if this is similar ?

What size tubing are you using ?

Nice work,

Harry

[brucer]

are you planning on tig welding it?

[HorridHenry]

The better brand in the UK is....
Liquid Engineering UK - Corro Dip

[HorridHenry]

Phosphoric acid - Wikipedia, the free encyclopedia

[turpija]

Only that bottom table weight around 30kg..

There is phosporic acid in antikor, but i don't know what else

As i have co2 mig welder, that's what i'll weld if with
Need to figure out a strategy how to avoid warpage

[Phife]

Are those rails supported or unsupported? what do you plan on machining with this machine?

[HorridHenry]

Need to figure out a strategy how to avoid warpage

Corner tack then weld the top pieces,by the time you have finished the top welds they will have cooled, turn it over and do the bottom welds, then side welds.

Keeping the welds cool in between welds helps and you have done the right thing by chamfering the edges,only a qualified welder can reduce warpage in their experience,there will be some warpage but only slight if methodically welded.

[PaulRowntree]

Keeping the welds cool in between welds helps and you have done the right thing by chamfering the edges,only a qualified welder can reduce warpage in their experience,there will be some warpage but only slight if methodically welded.

HH : How does the chamfer reduce warping?

[HorridHenry]

HH : How does the chamfer reduce warping?

Did I say it will help reduce warpage? the job he's tackling needs to be clamped down solid if he's not going to lift one of the pieces slightly at one end to account for the metal cooling and contracting back into a straight plane.

The thing about welding is keeping the weld cool where/whenever possible and thats why its best to increment weld.