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Posted by SteveB on April 5, 2008, 10:26 pm
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My BIL wanted me to cut a hole in the front of his front end loader to mount
a trailer ball to manipulate trailers. Simple, I think at first.
Then I notice there's two layers there. Ohhhh.
Now I'm using propane instead of acetylene. I fire it up, and blow a hole
in the top layer, about 3/16" thick. The molten metal looks like silver
globules. It blows upward and outward like a drop of milk in a saucer of
milk.
I heat and heat and heat the bottom layer until I fry the copper jacket on
my cutting tip. I change tips, this time keeping it farther away and
waiting for the proper color before hitting the oxygen. I penetrated the
lower layer, about 3/8" thick. I made a couple of circular passes to round
out the hole, but still saw a couple of the silver looking globules form on
the edge.
I know that any time you flame cut layered materials, it gets interesting.
But what was the silver coloration? Was it perhaps a different grade of
steel used on a bucket like that? Maybe hardened or different metallurgy?
Ended up getting a nice round hole, ground it to look nice, ball fit, and
BIL was happy. All's well that ends well.
Any suggestions on what I could have done different except drill a starter
hole with a conventional drill or MagDrill?
Steve
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Posted by Private on April 5, 2008, 9:57 pm
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> My BIL wanted me to cut a hole in the front of his front end loader to
> mount a trailer ball to manipulate trailers. Simple, I think at first.
>
> Then I notice there's two layers there. Ohhhh.
>
> Now I'm using propane instead of acetylene. I fire it up, and blow a hole
> in the top layer, about 3/16" thick. The molten metal looks like silver
> globules. It blows upward and outward like a drop of milk in a saucer of
> milk.
>
> I heat and heat and heat the bottom layer until I fry the copper jacket on
> my cutting tip.
Preheat from the under side, heat rises, after heating good and hot you can
make the pierce from the top or bottom. OxyPropane is not very good for
piercing heavy plate, ArcAir is quicker and cheaper if you have it. Once
you have a hole you can use the torch to make a clean sided hole.
Your BIL may want to keep a bolt in the hole to prevent wear when loading
dirt or gravel.
> I change tips, this time keeping it farther away and waiting for the
> proper color before hitting the oxygen. I penetrated the lower layer,
> about 3/8" thick. I made a couple of circular passes to round out the
> hole, but still saw a couple of the silver looking globules form on the
> edge.
>
> I know that any time you flame cut layered materials, it gets interesting.
>
> But what was the silver coloration? Was it perhaps a different grade of
> steel used on a bucket like that? Maybe hardened or different metallurgy?
>
> Ended up getting a nice round hole, ground it to look nice, ball fit, and
> BIL was happy. All's well that ends well.
>
> Any suggestions on what I could have done different except drill a starter
> hole with a conventional drill or MagDrill?
>
> Steve
>
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Posted by Rick Barter (rvb) on April 5, 2008, 11:22 pm
Please log in for more thread options wrote:
>
>> My BIL ...
Forgive me. What is BIL?
--
As Iron Sharpens Iron,
So One Man Sharpens Another.
Proverbs 27:17
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Posted by Pete C. on April 5, 2008, 10:40 pm
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"Rick Barter (rvb)" wrote:
>
> wrote:
>
> >
> >> My BIL ...
>
> Forgive me. What is BIL?
>
> --
> As Iron Sharpens Iron,
> So One Man Sharpens Another.
> Proverbs 27:17
Presumably "Brother In Law"
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Posted by SteveB on April 6, 2008, 2:20 am
Please log in for more thread options
> wrote:
>
>>
>>> My BIL ...
>
>
> Forgive me. What is BIL?
>
> --
> As Iron Sharpens Iron,
> So One Man Sharpens Another.
> Proverbs 27:17
Brother In Law
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> mount a trailer ball to manipulate trailers. Simple, I think at first.
>
> Then I notice there's two layers there. Ohhhh.
>
> Now I'm using propane instead of acetylene. I fire it up, and blow a hole
> in the top layer, about 3/16" thick. The molten metal looks like silver
> globules. It blows upward and outward like a drop of milk in a saucer of
> milk.
>
> I heat and heat and heat the bottom layer until I fry the copper jacket on
> my cutting tip.