Landscape Rake Build

[J_J]

J.J.,
The channel is 4" wide. The die I made is 4" X 4" square. Do I think it would bend 1/2" x 4"? On a 20 ton press it would be close, maybe right on the edge of it's limits. You are correct in that it did bend 1/2" x 3" hot rolled flat bar, the 20 ton air over hydraulic bottle jack was straining a bit. 1/2" x 4" would be a close call. If not, the width of the die could be increased to 5". I think for sure it would bend 1/2" x 4" that way, but of course the radius of the bend would increase a bit.

In the video you quoted me on, that was a test piece of 1/2 x 2.5" if you go back and listen to the sounds of the air motor on the test piece and compare it to the sound on the 1/2" x 3" wide bar (page 7 reply# 63) there is a noticeable difference in the load on the press motor. If I had a scrap piece of 1/2" x 4" I'd try it out for you to find out for sure. Did you still want me to make you an Anvil? if so I need a picture of your press and the O.D. of the stock anvil so as to machine one to fit.

Larry

LARRY, Can you do something like this?

 

[GuglioLS]

J.J.

How about something like this?:



The base plate is 6" x 6" x 3/4" thick (1/4 the size and weight of your proposed 12" x 12" base plate). It would still do job, be less costly in material and shipping plus more manageable to machine. Gussets could be welded on the ends just like I did to make my el-cheap-o die out of 4" channel. Is the 1" ID counter-bore at the top of the anvil correct? or does your press have a 2" OD stock anvil? OH and your idea to use a 3/4" Bolt to set bend depth / angle is a really good one. This design will produce a 90* bend without the depth bolt screwed in. I think this anvil and die combination will work just fine on 1/2" x 4" flat bar stock and smaller. I would still back it up with press plates underneath it. Let me know what you think........

Larry

 

[Renze]

Most pre-CNC benders, used an adjustable pushrod.
Do you know these hydraulic bottle jack with a screw inside the plunger, to lengthen the jack ?

Well it was kinda that principle. When adjusting the screw, you could adjust the maximum stroke. The stroke results in the bending angle.

 

[J_J]

J.J.

How about something like this?:



The base plate is 6" x 6" x 3/4" thick (1/4 the size and weight of your proposed 12" x 12" base plate). It would still do job, be less costly in material and shipping plus more manageable to machine. Gussets could be welded on the ends just like I did to make my el-cheap-o die out of 4" channel. Is the 1" ID counter-bore at the top of the anvil correct? or does your press have a 2" OD stock anvil? OH and your idea to use a 3/4" Bolt to set bend depth / angle is a really good one. This design will produce a 90* bend without the depth bolt screwed in. I think this anvil and die combination will work just fine on 1/2" x 4" flat bar stock and smaller. I would still back it up with press plates underneath it. Let me know what you think........

Larry

This is an update on the anvil after our talk this morning.

 

[GuglioLS]

J.J. - Hey your starting to get good at AutoCAD. OK I see exactly what you need now. Thanks for clarifying that. I will get right on it. I might make a few small mods to your design for ease of machining. I will post that after I draw it up for you to take a look and work at getting your stamp of approval. I told J.J I would call him around 9:00 to discuss the anvil he needs, well I got carried way blasting, it was 9:20 am. J.J. must have thought I forgot all about him, so he called me while I was right in the middle of this mess, it was time for a break and I'm glad he called so we could introduce ourselves and discuss the bending anvil design.


OK, Here is July 5th's Rake progress report...
Set up a Harbor Freight 40# pressurized sandblaster. Blasted just about everything in sight. It works great as it has much more pressure and stripping power than my little hand held sissy gun. I was just about ready to powder coat the A frame when I realized I needed an integrated support stand. How come one of you guys didn't let me know ahead of time to make one of those ???





Here the support stand is neatly tucked away in the stow position. After that was done, I set the A frame up between two ladders, and Powder coated it with the Harbor Freight powder coat gun I got for fathers day.... that was easy.




Larry

 

[GuglioLS]

After powder coating, I setup two 25 thousand BTU Propane heaters I had laying around. Those heaters are to bake the snot out of the powder coating so it will cure hard as rock. I know the metal was going to absorb allot of energy, so I pushed the heaters up close to within 1/4" of the A frame, then fired them up. Well actually I fired them up first to get them glowing with no flame, the powder coating is highly flammable when it's curing, Oh just great..





It only took THREE HOURS to get the temperature up 405* F, no flames, no burns, no disasters, whew, I'm glad that's done. I will take a different approach to powder coating and curing the boom. I did some experimenting and I have a plan to knock out the powder coating on the boom in 1/4 or less the time it took to cure the A frame. All in all, it came out pretty good for the first time I have ever done anything like that, don't you think?


Larry

 

[MJPetersen]

That is pretty neat! That is a lot of HEAT! You ought to rig up a sheetrock, rockwool "tent" to do that in so that you can contain some of the heat where it is needed. It would not have to elaborate or expensive. I know that you cannot cut off all air sirculation (the heaters need it) but seems to me that you should contain it a bit, or at least slow down its escape.

It looks absolutely gorgeous though!!

Mike

 

[SkunkWerX]

Larry,

Glad to see the HF blaster worked for you! You made a mess!

The powder coat looks great, I like how you matched the color of the powder coater's power supply box.

You are gonan force me to invest in a powder coater!
I have an old upright metal cabinet in the workhop, was thinking it would make a fine makeshift oven with the addition of a heating element.

 

[GuglioLS]

Mike,

Thanks for the reply and your good suggestion to contain the heat. I gave up on those "little" heaters, it took forever. If I had made a "tent" to contain the heat like you suggested I'm sure it would have worked much better. I was not in the mood to make any more stuff to get this project out of the shop and onto the tractor. In just a few minutes you will see my "redneck" solution that speeded up the process considerably.

Skunk,
HaHaHa, yea I made a big mess alright, one of the few things I'm really good at.

Larry

 

[GuglioLS]

For lack of a giant powder coating oven, In my last update I mentioned I was experimenting with alternative methods to "bake" the powder coating . My solution was to use a weed burner full blast to heat the metal first, then spray on the powder, I have to say that "technique" works like a charm. Below are pictures of the boom, it's 4" square tube X 3/8" wall X 48" long. Using the weed burner full blast along the length of the tube for about 20 minutes I got the temp up to ~ 400* F. After that, the powder was sprayed on, it melted on contact. About 20 minutes later the temp slowly dropped to ~ 319* F, perfect, the powder has cured hard as nails.





After the boom cooled, I took it down and set it aside to work on cylinder mounting brackets and the stand. Take a look at those cylinder mounts, they look delicious, I swear the finish looks just like candied apples.





The last photo shows chasing threads with a 1/2"-13 tap to remove excess coating.



Oh and here is a video of my Redneck powder coating oven: I used the Zippo lighter Rob gave me as a gift, and that straw hat, Rob gave me that too, what a guy.



Larry