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dan s
01-19-2009, 02:37 AM
I was turning down some 8620 tonight, and a 2″ long helix flew over my head, and landed on the back of my neck. After a quick “hot hot” dance, and a bandage I was back to making chips. To add insult to injury I took a blue 9 to the chin 5 minutes later.

Thus it's time to make a chip guard and I'm open to ideas, so show me what you got.

Evan
01-19-2009, 02:42 AM
http://metalshopborealis.ca/pics3/alive.jpg

It works just fine (the lexan box) but it makes it a pain to brush away chips or apply coolant-cutting oil. I don't use it very often.

Willy
01-19-2009, 03:00 AM
I don't use one.
They are a PIA. they inhibit visibility because they are either scratched or dirty. Always in the way as well.
I usually stand off to one side, out of the main path of 80% of the chips. I sometimes also wear a ball cap back wards (yeah, I know I know:D ) to keep those fliers out of my neck. I always wear safety glasses and if I have to get down close and personal, I'll wear a wrap around safety shield, as I have had a few hot ones sneak past the glasses.
On the mill, and occasionally on the lathe as well, I'll use a piece of cardboard to deflect the majority of the incoming flak.

Mark Hockett
01-19-2009, 03:07 AM
Heres the one on my lathe,
http://i24.photobucket.com/albums/c10/mahockett/haas11.jpg

dan s
01-19-2009, 03:36 AM
OK,

An hour of Google images, and a cup of tea latter, I'm starting to get a better idea of whats needed. What do you guys think about something like this?

http://www.mini-lathe.com/Mini_lathe/Versions/MM7x14_Chip_guard.jpg

I would scrap the idea of bolting it to the compound, instead I would use some rare earth magnets to hold it fast to the qctp tool holders.

Even,

Can lexan be heated and bent at home?

Mark,
want to trade lathes, I have an 8x14 ? :D:D

vinito
01-19-2009, 03:44 AM
"took a blue 9 to the chin"

Oh man, that's a great one. LOL

Here's my chip guard. It does have limits, and it interferes with vision somewhat, though still better than working with my eyes closed.

http://andrewsullivan.theatlantic.com/the_daily_dish/images/2007/08/24/hand.jpg

Evan
01-19-2009, 05:42 AM
Can lexan be heated and bent at home?


Yes. To avoid making a mess of it the polycarbonate must first be dried at low heat for an amount of time determined by the thickness. Polycarbonate contains trapped water and if heated for bending without drying first it will form thousands of tiny permanent bubbles that make it hard to see through.

Drying temperature is 250F for 3 to 5 hours.

Your Old Dog
01-19-2009, 07:01 AM
I use lexan with gaffer tape hinges. The middle piece is held to the mill vice with magnets. I then have a front piece cut to sit on the mill vice or I sometimes hold it like a ping pong paddle. This system works great for the mill. I just use the handheld paddle on the lathe but would like to have something better.

Andrew_D
01-19-2009, 09:53 AM
I wear a flip down shield/visor. Works alot better than safety glasses IMO, since the safety glasses to fit over prescription glasses are a PITA. Still get the ones hitting the hands though. Some of them are hot! :mad:

Somebody posted a pic a while back of a flip down shield for their lathe chuck made out of one of these safety shields. Can't remember if it was on this forum or not. Thought it looked like a good idea.

Andrew

GadgetBuilder
01-19-2009, 11:22 AM
I purchased a magnetic base with one of the "snake" arms but found it didn't work well for holding an indicator so I use it to hold a chip shield.

http://img179.imageshack.us/img179/3069/chipshieldup0.jpg (http://img179.imageshack.us/my.php?image=chipshieldup0.jpg)

I used a piece of Lexan I found but it needs to be cut down, it's larger than needed and is heavy enough so it is a challenge for the arm to keep it in position. Its best feature is that it is easily moved from machine to machine as needed.

The bits of plastic around the mill table are for swarf containment. I had a 3 sided plastic box around the table but it didn't work out after adding the DRO because of the way I attached the Z axis.

I'm hoping this thread will have some ideas for a plastic chip deflector that partially surrounds the tool and is easily moved out of the way, something perhaps 4"-6" diameter. My goal is to confine most of the swarf to the mill table to simplify cleanup.

John

Teenage_Machinist
01-19-2009, 02:04 PM
For a smallmill maybe youcould use a soda bottle wiht the neck cut off (Sherline)

If you get brass in your eyes, use a peiece of shim stock, over the tool in the T.P which might a lso work for a chip breaker.


For a small lathe there is a very professional looking one, wraparound, made of face shield on a Griz mini lathe. Looks like commmercial accesory.

Walter
01-19-2009, 05:38 PM
I use a chunk of plexi cemented to a chunk of acrylic tube, slipped over the shaft on a mag base. easy to move, easy to spin out of the way for fast access.

Frank Ford
01-19-2009, 05:47 PM
For the mill, a fitting that plugs in near the quill, and supports the chip guard on a stalk of Loc-Line:

http://www.frets.com/HomeShopTech/QuickTricks/ChipShield/chipshield01.jpg

For the lathe, one that fits into a magnetic base indicator holder:

http://www.frets.com/HomeShopTech/QuickTricks/ChipShield/chipshield04.jpg

mochinist
01-19-2009, 06:10 PM
I do the same with a generic noga indicator mag works great and is easily removed

I purchased a magnetic base with one of the "snake" arms but found it didn't work well for holding an indicator so I use it to hold a chip shield.

http://img179.imageshack.us/img179/3069/chipshieldup0.jpg (http://img179.imageshack.us/my.php?image=chipshieldup0.jpg)

I used a piece of Lexan I found but it needs to be cut down, it's larger than needed and is heavy enough so it is a challenge for the arm to keep it in position. Its best feature is that it is easily moved from machine to machine as needed.

The bits of plastic around the mill table are for swarf containment. I had a 3 sided plastic box around the table but it didn't work out after adding the DRO because of the way I attached the Z axis.

I'm hoping this thread will have some ideas for a plastic chip deflector that partially surrounds the tool and is easily moved out of the way, something perhaps 4"-6" diameter. My goal is to confine most of the swarf to the mill table to simplify cleanup.

John

Alistair Hosie
01-19-2009, 06:17 PM
here's mine Alistair

http://img.photobucket.com/albums/0903/tybachdai/100_1141.jpg

dan s
01-20-2009, 05:03 AM
Thanks for all the ideas guys, they gave me enough inspiration to come up with what i think is a decent design.

It's to late to go into details, but here are two teasers.

http://img262.imageshack.us/img262/2825/lathechipshield1nq8.th.jpg (http://img262.imageshack.us/my.php?image=lathechipshield1nq8.jpg)

http://img262.imageshack.us/img262/2397/finishedshieldgd0.th.jpg (http://imageshack.us)

j king
01-20-2009, 08:58 AM
That looks alot like mine but I have an aluminum base .The blue chips will melt into the plastic as mine is mounted.Here is mine.I like it because it is rigid,flexible,snaps on and of in 2 seconds with no tools or knobs and will swing of to the side to access tool.Keeps the chips in the machine!

http://img.photobucket.com/albums/v24/ikimjing/jimssteady001-1.jpg


here it is tilted to get to tool.
http://img.photobucket.com/albums/v24/ikimjing/jimssteady002-1.jpg


Here is the simple mount. Just 2 pieces of delrin turned and a groove the thickness of the aluminum plat that is held by 2 bolts.To adjust the squeeze on the plate just tighten the bolts a hair more.

http://img.photobucket.com/albums/v24/ikimjing/jimssteady003.jpg
Jim

Fasttrack
01-20-2009, 11:01 AM
Bah ... chip gaurds. Before I got into machining, I was welding and blacksmithing with a charcoal forge. You get some metal drips from overhead welding down your shirt or bits of ember in your gloves and hot chips actually feel good :D

I'll be interested to see how your design works out. I think it will work (not that that means anything), but it will probably get banged up pretty quick if you don't have chip breakers already ground on your tool bits. Looks like those long ones will feed right up into the plastic. I know lexan is hard, but chip flow will wear away hardened steel, so I'm guessing it can scratch up lexan.


edit: JKing - that is a good idea. I like it!

Evan
01-20-2009, 11:03 AM
This is what I use when the chips are really flying. It's the best I have found and it also covers most of my beard.

It is the Uvex Bionic Face Shield. I have two and they are the most comfortable and give complete protection.

http://metalshopborealis.ca/pics/uvex.jpg

madman
01-20-2009, 12:26 PM
Well im Photobucket retarded dont like computers much, But for a nice guard use lexan (3 pieces roughly the same size foot long foot high or 10 inches high?) . Cut the front bottom section of the lexan out so it will fit over the vice body or saddle. Then on each side of this main vice saddle contoured lexan piece install a hinge and bolt another section od same sized lexan onto it. Now you have a Guard that sits on the vice and will be able to adjust the two sections like movable legs to support it. Quick On quick Off and folds flat for storage . Ihope you understand my Mad Explanation Thanx mike

dan s
01-20-2009, 12:40 PM
I'll be interested to see how your design works out. I think it will work (not that that means anything), but it will probably get banged up pretty quick if you don't have chip breakers already ground on your tool bits. Looks like those long ones will feed right up into the plastic. I know lexan is hard, but chip flow will wear away hardened steel, so I'm guessing it can scratch up lexan.

I'm expecting it to get scratched and banged up over time so the Lexan is replaceable. I got the Lexan last night at Menards for $14 (18" x 24" x 3/32"). The shield took about 20 mins to make and cost about $2.50.

It would have been a lot cool if I hade made this about 2 days ago. :D

Fasttrack
01-20-2009, 12:58 PM
Ooo... I dunno. $2.50 is a little bit rich for my blood

:D

small.planes
01-20-2009, 05:07 PM
Normally I use a full face shield, a little bit like this one:
http://i306.photobucket.com/albums/nn274/small_planes/browguard.jpg
but *much* better quality...

The only time I have used a 'chip guard' was when I was cutting with my boring head and if the (pointy, sharp) bit came free it was quite probably coming at my chest :eek:

http://i306.photobucket.com/albums/nn274/small_planes/SSC_3491.jpg

Thats a piece of laminated glass from a post office counter. Good enough for stopping small projectiles, and handily on the floor by the mill when I needed a shield.

Dave

dan s
01-25-2009, 12:09 AM
The magnets arrived Yesterday, so I finished up the shield this morning. I posted some photos of the finished shield here:
http://www.dans-hobbies.com/2009/01/24/finished-lathe-chip-shield/