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  #1  
Old 06-26-2018, 11:53 AM
kjoiner kjoiner is offline
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Default Marking bend lines on sheet metal parts

I make a lot of sheet metal parts that are subsequently bent. I can generate flat patterns with bend lines in my CAD system. I bring all of that into V Carve and cut the flat patterns, but I mark the bend lines afterward with Dykem and a height gauge. It's slow and I have to clean off the Dykem afterward.

I'm thinking of using either a marker holder like Cosmos has or using a diamond drag to mark the bend line. I want the bend line as fine as possible.

I noticed on Cosmo's site that the Z required for the fine tip marker is 5.6" which is probably too high for my Stinger 1.

Any thoughts?

Thanks,

Kyle
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  #2  
Old 06-26-2018, 12:33 PM
WRAWL WRAWL is offline
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Have you tried using a ball nose endmill to make a very light cut to identify your bend lines? Im not sure if that would affect your finished product or not but it would definitely work.
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  #3  
Old 06-26-2018, 02:45 PM
kjoiner kjoiner is offline
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Hello,

I have a tapered ball end mill with a 1/32 radius, but I want to keep the line as sharp as possible.

Kyle
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  #4  
Old 06-26-2018, 02:55 PM
SCHEPEBC SCHEPEBC is offline
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I have used an engraving bit. Works well
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  #5  
Old 06-26-2018, 07:11 PM
drummerjg drummerjg is offline
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I think a diamond drag engraving bit is going to get you the thinnest line possible. Just my humble opinion.
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  #6  
Old 06-26-2018, 07:11 PM
BradyWatson BradyWatson is offline
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Use a diamond drag or sharpen a broken carbide or HSS tool to a point. You can do this on a bench grinder or 4.5" grinder with flap sandpaper disc etc.
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  #7  
Old 06-29-2018, 08:37 AM
kjoiner kjoiner is offline
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Hello,

I did some testing yesterday while making another batch of brackets. I did one test using an In Groove cutter I have. It worked pretty well, but I think the tip chipped a little during the test. For the second test, I used a 90 In Tech v groove cutter. It worked pretty well but I think a diamond drag might be the best option.

Even though each test did not produce perfect results, I was able to elminate the time consuming steps of applying Dykem, scribing the bend lines and then having to remove the Dykem afterward. That is a significant time savings.

I've got a lathe at work and I can make my own diamond drag tool. The only unknown for me at this point is how much spring pressure is needed. I see that some tools like the Widgetworks has two springs. Does anyone have information on how much force is typically required?

Thanks!

Kyle
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IPA LLC
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Duluth, GA
CAMaster Stinger 1 23
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  #8  
Old 06-29-2018, 10:45 AM
BradyWatson BradyWatson is offline
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$25 with diamond drag bit, spring & set screw---> Ebay

-B
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  #9  
Old 06-30-2018, 08:33 AM
The real JP The real JP is offline
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I don't know exactly what you make, but sometimes it can be faster to just make a jig or use a tape and pencil to make mark.
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  #10  
Old 07-02-2018, 08:52 AM
kjoiner kjoiner is offline
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Hi JP,

In the most recent case, I was making 55 small brackets. Applying layout blue, scribing the bend line and later cleaning off the layout blue takes a lot of time and is messy. Having the Stinger mark the lines is much more efficient.

Most of the parts I make are prototypes, but in this case, I needed to make the brackets because our supplier was running late and that could hold up production on our end.

Kyle
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CAMaster Stinger 1 23
FTC, Laser Cross Hair
Vectric V Carve Pro
Remote Handheld Keypad
Solid Edge ST10
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