Author Topic: Carburator float post repairs LASER WELDING W/pictures (Read 20521 times)

Jim F · « **on:** February 23, 2007, 01:51:06 PM »

OK guys I know that we never have ever dropped a carburetor while its apart for cleaning or re-building but

what if you brake the post that holds the axle that the float bowls ride on? either throw it away or try to use marine epoxy with is messy and the epoxies

that I have found are not suppose to be used in that type of environment.

My company specializes in micro laser and micro tig welding of all ferrous and non-ferrous metels. www.jmfmicroweld.com. I Have pictures of welding but no laser pictures as of yet, but send your e-mail address and I can send you pictures of a carburetor that is in the shop for repairs. Its jmfmicroweld@earthlink.net

I have Laser welded the posts back using either .010 or .015 40 series aluminum rod with very good results. much stronger than the ones that I have seen that have been repaired with Epoxy.

Anyone can call me if they have questions at 770-367-7320 or go to my web page at www.jmfmicroweld.com with all my info
thanks
Jim French

Jim F · « **Reply #1 on:** March 09, 2007, 07:00:20 PM »

at last some pictures

Jim

doug_id · « **Reply #2 on:** March 09, 2007, 07:04:41 PM »

Wow that is pretty cool!

Steve F · « **Reply #3 on:** March 10, 2007, 02:25:04 AM »

Wow (I second that)! I've never seen laser welding and would like to know if this is something that requires filler metal like when TIG welding. Is this something that is done by hand? (can you tell I have no idea how it's done?). Please tell us more......

Raul CB750K1 · « **Reply #4 on:** March 10, 2007, 03:13:39 AM »

Third wow, tell us more please

Kevin400F · « **Reply #5 on:** March 10, 2007, 03:40:41 AM »

The carbs are a zinc alloy. Aluminum rod works for that?

puppytrax · « **Reply #6 on:** March 10, 2007, 05:53:40 AM »

Very nice looking...very clean looking!...did you V-out the pieces before welding, to get 100% penetration?? Or is that just a proof-of-concept pic, for our benefit??

puppytrax · « **Reply #7 on:** March 10, 2007, 05:55:19 AM »

Quote from: Kevin400F on March 10, 2007, 03:40:41 AM

The carbs are a zinc alloy...

Just curious...where did you hear/read that they are zinc??

A lot of my old cap pistols were Zinc...pot-metal, we called it back then...

Jim F · « **Reply #8 on:** March 10, 2007, 02:57:14 PM »

Yes the cracked area was ground out and filler rod was used

I use .010 4043 filler rod obvious its aluminum rod

as far as penetration is concerned, with power settings for .010 to .015 diameter rod there should be about 80% penetration

this process is like tig and the rod is filled in by hand looking threw a microscope

the laser pulses and you just follow the crack and add filler rod

easy............lol

here is a picture of the system

Bob Wessner · « **Reply #9 on:** March 10, 2007, 02:59:05 PM »

So how much should I tell my wife I'm spending on my next tool?

Jim F · « **Reply #10 on:** March 10, 2007, 03:03:18 PM »

will that system was $80K and change but thats what by business is all about
tool steel welding very small areas on plastic injection molds

my web page is www.jmfmicroweld.com but there are no laser pictures on there as of yet

Jim

old750 · « **Reply #11 on:** March 10, 2007, 06:58:35 PM »

Can't you braze the stuff? I'm pretty sure pot metal has high melting point so it would make it easier, no?

mrbreeze · « **Reply #12 on:** March 10, 2007, 07:26:07 PM »

That is a good looking bead and I'm sure it is as strong or stronger than the original casting. However.....I just have to ask....How much would a repair like that cost and how many areas in the US can do this type of repair?
I have never seen a weld that small and imagine it would take a bit of cash to have it done(maybe more than the cost of a new casting).

puppytrax · « **Reply #13 on:** March 11, 2007, 06:28:53 AM »

Hey Jim - I'll bet you could weld broken fins back on Honda cylinders with that...heh, heh...

(The line forms behind me, no pushing or shoving, please!)

Jim F · « **Reply #14 on:** March 11, 2007, 02:16:09 PM »

Per post is $25.00 as is most repairs that are this small on carburetors
if you have a carburetor that needs repaired like this and the price sounds good then
just mail, UPS, or FED-X and i can get this turned around in a day. There is no need to re-machine anything

As far as pot metal in concerned, I haven't run in to a carburetor that has been made of this material but that doesn't mean that I wont
at least try an weld it with standard aluminum rod with the laser

go to my web site at www-jmfmicroweld.com if you need to call me or shipping instructions

Big-Jim

purf_man · « **Reply #15 on:** March 11, 2007, 02:28:01 PM »

Ill temptered sea-bass?

Jim F · « **Reply #16 on:** March 11, 2007, 07:19:26 PM »

if hes made a a ferrous or non-ferrous mettles then yea

but I kind of doubt it

Jim

mrbreeze · « **Reply #17 on:** March 11, 2007, 08:03:37 PM »

I would say $25 is fair for that repair.You might find another set of carbs on ebay that is cheaper in the long run but these ebay carbs aren't going to be around forever. Anyhow....thats a way cool setup you got there at work BigJim and I imagine you can do alot more than just carb body repairs. I will bookmark this post for future reference.

Jim F · « **Reply #18 on:** March 11, 2007, 08:19:03 PM »

A big thanks so much and if I can help ya

let me know

Jim

old750 · « **Reply #19 on:** March 11, 2007, 08:21:47 PM »

I think brazing is much cheaper and doesn't require a super expensive setup. It does the same and looks are of no concern for something like this.

mrbreeze · « **Reply #20 on:** March 11, 2007, 08:33:21 PM »

I don't know........thats some pretty small area to be brazing in.......I like the look of the lazer weld better and I would also trust the strength more.

old750 · « **Reply #21 on:** March 12, 2007, 07:55:18 AM »

How strong does it need to be? I think I remember my welding teacher saying something like 30000 PSI for aluminum and 60000 PSI for steel.

canttuckmyshirt · « **Reply #22 on:** March 12, 2007, 10:49:01 AM »

That is REALLY cool. I had to show all my shop buddies at work

jevfro · « **Reply #23 on:** March 12, 2007, 12:04:06 PM »

Some sweet technology there! Would this be ideal for building up material like fins on the cylinders too? or, is that better done w/ a tig set-up? (I've got some road rashed ones on mine)

Jim F · « **Reply #24 on:** March 12, 2007, 08:03:22 PM »

Hey jevfro

I would think conventional tig welding would work for fins but it depends on how clean
you get it (or I would have to get if you wanted me to do the welding) in order to get
a strong clean weld. The laser is much less forgiving when it comes to dirt. The carb pictures
show that all I did was grind out the cracks with carbide burs then laser weld with out any further cleaning.
Conventional tig welding also dumps ALOT of heat in to one area but for the cylinder it wont be that much.
The carburetor weld after welding was only warm to the touch.

Let me know if I can help

Jim

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Author Topic: Carburator float post repairs LASER WELDING W/pictures (Read 20521 times)