Author Topic: Chester 626 mill CNC Conversion (Read 386014 times)

John Swift · « **Reply #125 on:** November 27, 2011, 03:24:12 PM »

Hi Rob ,

its learning simple techniques like that helps
those of us who's day job is not mechanical engineering

John

PeterE · « **Reply #126 on:** November 27, 2011, 04:02:12 PM »

A most efficient solution to get the punch marks where they should be!

I have seen this solution described in an MEW issue some time back, but then the author at the time also hardened the transfer punch screws, did you do it as well or just used the screws as they are???

BR

/Peter

Rob.Wilson · « **Reply #127 on:** November 27, 2011, 04:09:27 PM »

Cheers John ,,,,,,,,,, it may come in handy one day

Hi Peter ,,,,,,,,,,,,, just as they are , no need to harden them for a quick one off job

Rob

PeterE · « **Reply #128 on:** November 27, 2011, 04:25:57 PM »

Thanks Rob

That's true, and if the need re-occurs over and over again it will be easy to sharpen the point when needed, of course.

BR

/Peter

Brass_Machine · « **Reply #129 on:** November 27, 2011, 10:40:35 PM »

Great way to make some dimples!

And, BTW,

That looks like it belongs there...

Eric

loply · « **Reply #130 on:** November 28, 2011, 05:18:18 PM »

Anybody know where you can buy sets of these screw-in transfer punches? Been looking for them for ages, can't seem to find them though...

John Stevenson · « **Reply #131 on:** November 28, 2011, 07:15:48 PM »

You can get nearly the same result using a ball bearing, choose a size just big enough not to get stuck in the hole.

I personally use an allen grub screw wound in backwards so it leaves the point sticking out

John S

Rob.Wilson · « **Reply #132 on:** December 02, 2011, 04:32:06 PM »

Cheers Eric

Now that the ends are fitted to the table , i could now mark out the position for the bearings , working from the nut .

the other way .

And if i have positioned the table ends correctly ,, the scribed lines should be smack bang in the centre of the bearing block .

they were

With both ends marked up ,, i now needed some way of boring out the ends , i decided to use the CUB lathe and mount them on the face plate .
To do this i had to machine up a fixture plate , the end bolted to the plate ,plate bolted to the faceplate .

The fixture plate was machined up from a bit 1"x6"x6" hot rolled steel .
Method i used to hold the plate wile i machined the face's flat .

Finished fixture plate ,, with built in screw jack .

Set up on the lathe ready for boring tomorrow

Rob

doubleboost · « **Reply #133 on:** December 02, 2011, 06:56:43 PM »

Even the jig is perfect

I bet the final cut has your arse twitching

I think you are on the home straight now
John

arnoldb · « **Reply #134 on:** December 03, 2011, 02:45:50 AM »

Good going Rob

I really like the way you mounted the plate for facing the flats; never thought to use the clamping kit like that

Great write-up and photos as well

, Arnold

Rob.Wilson · « **Reply #135 on:** December 03, 2011, 05:17:49 PM »

Thanks John and Arnold

Well that one machined up ,,,,,,,,,,,,, still need to decide what bearings to use on the other end of the ballscrew ,,, i will have a rummage tomorrow and see what i have in my box of bearings .

Rob

Brass_Machine · « **Reply #136 on:** December 03, 2011, 05:25:24 PM »

I wish the pieces I made for my tooling looked half as good as that!

Eric

doubleboost · « **Reply #137 on:** December 03, 2011, 05:37:14 PM »

That really looks the part now

I must get some steel that is shiney on the inside

John

HS93 · « **Reply #138 on:** December 04, 2011, 02:22:18 AM »

My work seems to be the opposite to Rob's I take a nice piece of shiny metal and make it look Crap,

people say "what is the thread for " and I have to say it is supposed to be smooth

very interesting post thanks for the detail.

Peter

Rob.Wilson · « **Reply #139 on:** December 04, 2011, 05:37:35 AM »

Thanks Lads

,,,,,,,,,I am pleased with the way the CUB

Bluechip · « **Reply #140 on:** December 04, 2011, 05:41:54 AM »

Quote from: Rob.Wilson on December 04, 2011, 05:37:35 AM

Thanks Lads ,,,,,,,,,I am pleased with the way the CUB

DOES WHAT ???

BC

Rob.Wilson · « **Reply #141 on:** December 04, 2011, 05:46:00 AM »

Thanks Lads

,,,,,,,,,I am pleased with the way the CUB grafts

Apologies Petter ,,,,,,,,,, Just re-read the thread and realized i had misses your question about the weld prep

,,,,, You got it, it is to get good penetration and also i new the job would distort a tad and would need machining back square .

Rob

Rob.Wilson · « **Reply #142 on:** December 04, 2011, 05:47:45 AM »

Quote from: Bluechip on December 04, 2011, 05:41:54 AM

Quote from: Rob.Wilson on December 04, 2011, 05:37:35 AM
Thanks Lads ,,,,,,,,,I am pleased with the way the CUB

DOES WHAT ???

BC

Now how did that happen Dave

Must have pressed something wile typing

Rob

saw · « **Reply #143 on:** December 04, 2011, 05:49:35 AM »

Nice done Rob

DMIOM · « **Reply #144 on:** December 06, 2011, 11:20:43 AM »

Quote from: Rob.Wilson on December 03, 2011, 05:17:49 PM

.....

......

Well, I know there were at least one set of raised eyebrows when Rob showed his 3D model with a shiny bore - but I think we'd have to admit that the results aren't that different!

Dave

loply · « **Reply #145 on:** December 06, 2011, 04:07:15 PM »

Rob,

Do you mind me asking why you decided to do this operation on the lathe rather than the mill? Is it because the mill is in pieces/you don't have another one, or is it advantageous to do it on the lathe?

Rob.Wilson · « **Reply #146 on:** December 07, 2011, 03:08:01 PM »

Thanks Benni

Cheers Dave ,,,,,,,,, I it looks close enough

Quote from: loply on December 06, 2011, 04:07:15 PM

Rob,

Do you mind me asking why you decided to do this operation on the lathe rather than the mill? Is it because the mill is in pieces/you don't have another one, or is it advantageous to do it on the lathe?

Hi Loply ,,,,,,,,,,,,Dont mined at all ,,, its allot easier/quicker to do a boring operation in the lathe if the job will fit ,better range of feeds and speeds , if i had used the other mill and a boring head i would have had to hand crank the Z feed ,no power feed , much better to sit back have a brew and watch the lathe do all the work

I also wanted the use the old CUB lathe as since its rebuild it has only done one other real job

Just to add , the fixture plate will be used for other jobs that come up ,,not just on the lathe

Rob

John Rudd · « **Reply #147 on:** December 07, 2011, 03:58:13 PM »

Quote from: Rob.Wilson on December 07, 2011, 03:08:01 PM

its allot easier/quicker to do a boring operation in the lathe much better to sit back have a brew and watch the lathe do all the work

Err more like a pint of Newcy Brun Ale....than tea...( why cant I do a Goerdie accent in typology...

)

Nice job there Rob....very nice...

doubleboost · « **Reply #148 on:** December 07, 2011, 04:03:00 PM »

Looking great Rob
To take a worn out machine restore it and then turn out parts like that
Is a true insperation

Rob.Wilson · « **Reply #149 on:** December 14, 2011, 04:09:53 PM »

Cheers John and John

John ,,,,,,,,,,,,,

i prefer a higher alcohol content in my bottle

A bit more done ,,,,,,,,,,,,,,,,not allot but its a step closer to the finish line

,,,,,, Turned up the locking rings for want of a better name ,, these
do three jobs , lock the bearing outer ,hold the shaft seal and to locate motor . And i also machined up the end cap for the other end

Rob

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