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Badge/Medallion


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#21 Sparky_NY

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Posted 23 December 2018 - 06:40 PM

Any reason you cant mill these flat and then bend them around the correct diameter pipe?

Yup,  brass won't bend worth a shit.    It cracks/breaks.     Similar to aluminum.    



#22 Cutter

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Posted 23 December 2018 - 07:39 PM

Going to cut on your mill?     Going to need a really tiny endmill for the detail and those are a real PITA without mega rpm's.     I have been thinking of one of those china air cooled router spindles as a sub spindle for such things,  800 watt (about 1hp) with a vfd is under $200 these days,  24000 rpm max and a er collet,    Pretty small too, about 2-1/2 x6-1/2 round.  Maybe later this year.

 

 

Yep, cutting on my mill.
1/32 ball  3500 & 4 ipm
.0003 chip load.
Maybe 4 or 5 hours  ,  push button, take nap 

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#23 Cutter

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Posted 23 December 2018 - 10:17 PM

Any reason you cant mill these flat and then bend them around the correct diameter pipe?

 

A 2” to 2-1/2” radius will form easy with a Press, using 1/8 or 3/16 thick brass.
It can also be rolled, but this method uses more material & time


#24 Roller

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Posted 23 December 2018 - 11:46 PM

A five axis machine would be ideal for this build.

 

Frank


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#25 Cutter

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Posted 24 December 2018 - 03:53 PM

A five axis machine would be ideal for this build.

 

Frank

 

Yes Frank, 
It’s fun doing 5 axis cutting , I have the software
but only 4 axis machining capability.

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#26 Cutter

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Posted 24 December 2018 - 06:28 PM

3 Axis cutting on a formed blank.
 

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#27 maccrazy2

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Posted 24 December 2018 - 11:45 PM

Nice. What program are you running?

#28 Cutter

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Posted 25 December 2018 - 04:32 PM

Nice. What program are you running?

 

 

Surfcam 



#29 Larryx

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Posted 05 March 2019 - 10:41 PM

 
 
I spoke to Paul Moore of RG G Gatling guns a few days ago regarding a build question and from our conversation I believe he might be thinking of producing some additional copies of his beautiful authentic brass medallions. He would not commit but it would be great if they became available. Maybe one of you old timers who knew him back in the day could call him and find out what he is thinking.
 
 


-
 


#30 Sparky_NY

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Posted 05 January 2020 - 02:48 PM

I am to the point of wanting a medallion for my .357 gun.      Anyone have any drawing files for one?    Engraving is a new area for me,  going to have to practice on some scrap aluminum sheet.   

 

I have looked at etched medallions as a alternative but the etching is very shallow so not as nice as one engraved.

 

Also looked at diamond drag engraving.

 

Have to experiment but need a drawing file.     Hate to start from scratch if I don't have to.



#31 Cutter

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Posted 05 January 2020 - 04:12 PM

 Sparky, Here’s a .DXF of what I started.
 Should be easy to edit
 Good Luck

Attached Files


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#32 Sparky_NY

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Posted 05 January 2020 - 07:58 PM

Thanks much !!



#33 4171

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Posted 06 January 2020 - 12:00 AM

Sparky are you going program a cnc to make these?
Mike

#34 Sparky_NY

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Posted 06 January 2020 - 12:25 AM

Sparky are you going program a cnc to make these?
Mike

Well,  I am going to try to !         Its new territory for me so some experimenting  will be needed.   My bridgeport is really the wrong machine for the job, a LOT more rpm's are the norm.   The time may get prohibitive.



#35 4171

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Posted 06 January 2020 - 01:21 AM

Whops should have looked back a couple comments. Somebody should, I need three😎Mike

#36 Sparky_NY

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Posted 08 January 2020 - 01:31 PM

 

 Sparky, Here’s a .DXF of what I started.
 Should be easy to edit
 Good Luck

 

Been playing with this some.     The DXF imports as only one layer of line art.    The text is shown as lines rather than fonts, so editing the text  is not possible.    I can delete text, no problem there.   The letter "S" in "Gatling's" I cannot select, it appears to not be a closed shape for some reason.    I was able to extrude the other letters as raised type, no problem there,  I was also able to assign a toolpath to those letters I raised.   I simulated a engraving toolpath with everything BUT that letter "S"

 

That problem with the letter "S" described above is the main problem.   I was going to use the drawing with the exception of "Klienfeldt" which I deleted BUT I cannot do anything with that letter "S".     Being its not recognized as a font but rather a series of lines,  and not finding a similar font in windows,  I cannot simply replace that one letter "S"    I suspect the font is not a standard windows font but rather one added or included with the software used to design the medallion.

 

SO......    Its looking like I will have to do a new drawing but can reuse the gun artwork at least.    Its OK, will be educational to layout something like this and add it to my bag of tricks.

 

This whole gun project has been a great learning experience which was the main reason for doing it.
 


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#37 Cutter

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Posted 08 January 2020 - 05:01 PM

First complaint ever on my S

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#38 Sparky_NY

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Posted 08 January 2020 - 06:45 PM

 

First complaint ever on my S

 

Don't get me wrong,   your S don't stink ,   its as nice a S as they come.    I just can't get it to pile as high as the others.


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#39 Cutter

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Posted 08 January 2020 - 07:15 PM

I could help with some computer work
but no machining
Try this parasolid file

Attached Files


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#40 Sparky_NY

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Posted 08 January 2020 - 07:40 PM

Found a couple other original medallion pics.    Apparently some say Gatling,  others say Gatling's .    SO... it may not be that bad to just leave the S off completely.

 

(I have not got to try the new parasolid file yet )

 

 

Attached Files


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