Rear bumper fab - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > General Technical Discussions > Fabrication Shop > Rear bumper fab

Baseline 4x4 Lifetime Warranty 4340 Chromoly Axle Shaft KiClayton Off Road WJ Long Arm Kits!Clayton Off Road - JK Prototype Gas Tank Skid

Reply
Unread 11-26-2012, 07:31 PM   #1
zboss86
Registered User
2001 TJ Wrangler 
 
Join Date: Oct 2010
Location: Tupelo
Posts: 242
Rear bumper fab

It was fun doing a front bumper, so here's my attempt on the rear...

image-2025969729.jpg   image-2944032419.jpg   image-1895514405.jpg  
__________________
Cleaning out the garage... check what I have for sale here:
http://midsouthjeeps.com/forum/index.php?/topic/20693-jeep-parts-for-saletradebumper-2-spacers-relocation-brackets/
zboss86 is offline   Reply With Quote
Unread 11-26-2012, 08:18 PM   #2
zboss86
Registered User
2001 TJ Wrangler 
 
Join Date: Oct 2010
Location: Tupelo
Posts: 242
Any particular order you guys do that speeds up grinding the welds? Are you guys only using flap disc or do you you use a hard disc and then smooth it out with a flap disc? What grit flap disc do you use? I'm sure I'll get faster I as my welding improves and have less mess to clean up....

I had another question, but I'm going to move it to another thread...

Last edited by zboss86; 11-27-2012 at 09:00 AM.. Reason: moved question to another thread
zboss86 is offline   Reply With Quote
Unread 11-29-2012, 09:24 PM   #3
Jason
Registered User
2005 TJ Wrangler 
 
Join Date: May 2009
Location: Eaton Rapids, Michigan
Posts: 6,368
Grinding disc until it's close to smooth; careful not to gouge it. Then a 36 grit flap disk, progressively finer to get it smooth, usually 60 or 120 grit.
__________________
"Ugly Betty" Build - 97 TJ 5.9 Magnum / 46RE Swap

Quote:
Originally Posted by ashland82391 View Post
We're men! We don't need no stinkin directions!
Jason is offline   Reply With Quote
Unread 11-30-2012, 05:01 AM   #4
zboss86
Registered User
2001 TJ Wrangler 
 
Join Date: Oct 2010
Location: Tupelo
Posts: 242
Quote:
Originally Posted by Jason
Grinding disc until it's close to smooth; careful not to gouge it. Then a 36 grit flap disk, progressively finer to get it smooth, usually 60 or 120 grit.
I'll have to get some 36 grit flap disc to try... I pretty much use 60 grit on the whole bumper.
__________________
Cleaning out the garage... check what I have for sale here:
http://midsouthjeeps.com/forum/index.php?/topic/20693-jeep-parts-for-saletradebumper-2-spacers-relocation-brackets/
zboss86 is offline   Reply With Quote
Unread 11-30-2012, 06:37 AM   #5
Jason
Registered User
2005 TJ Wrangler 
 
Join Date: May 2009
Location: Eaton Rapids, Michigan
Posts: 6,368
That's a cool looking design. How does it mount? Any plans for D-ring mounts for recovery gear?
__________________
"Ugly Betty" Build - 97 TJ 5.9 Magnum / 46RE Swap

Quote:
Originally Posted by ashland82391 View Post
We're men! We don't need no stinkin directions!
Jason is offline   Reply With Quote
Unread 11-30-2012, 06:56 AM   #6
Jim1611
Web Wheeler
 
Jim1611's Avatar
1985 CJ7 
 
Join Date: Jul 2009
Posts: 5,601
I've found that by leaving the outside corners open and filling with weld there's not much grinding. Cut the pieces to fit so that they end up looking like the picture below. Weld the outside bead first, you'll fill the gap with weld, then weld the inside fillet. After it's all welded about all there is to do is clean the edge up a little and it makes for a stronger joint.

__________________
www.crabtreetool.com (Crabtree Shackle Hangers)

My build thread
http://www.jeepforum.com/forum/f8/ji...build-1093702/
Jim1611 is offline   Reply With Quote
Unread 11-30-2012, 07:29 AM   #7
zboss86
Registered User
2001 TJ Wrangler 
 
Join Date: Oct 2010
Location: Tupelo
Posts: 242
Quote:
Originally Posted by Jason View Post
That's a cool looking design. How does it mount? Any plans for D-ring mounts for recovery gear?
Thx, I just mimic'd a few other designs... I'm going to add a trailer hitch receiver and and a couple shackle mounts. It has plates tacked on to set the bumper on while I'm fabbing. I'm going to weld on some mounts to bolt it to the stock location. I'll also tie the stock location to the frame a little better.

Quote:
I've found that by leaving the outside corners open and filling with weld there's not much grinding. Cut the pieces to fit so that they end up looking like the picture below. Weld the outside bead first, you'll fill the gap with weld, then weld the inside fillet. After it's all welded about all there is to do is clean the edge up a little and it makes for a stronger joint.
I agree Jim1611, that makes for a lot stronger weld. It's also great for a rounded edge b/c there's not much clean up. But I've found out it makes it a pain when I want to make a sharp corner. I have to come back and add "filler" weld and grind it out to a point. Just depends on the look I'm going for...
BTW, I viewed your build... sweet!
zboss86 is offline   Reply With Quote
Unread 11-30-2012, 11:14 AM   #8
Molonlabemike
Registered User
1997 TJ Wrangler 
 
Join Date: Oct 2011
Location: Rancho Chuchamonga, CA
Posts: 549
Love the design, any shots of how the back side looks and mounts up?

Sent from my iPhone using JeepForum
__________________
[URL="http://www.jeepforum.com/forum/f22/yota-jeep-my-build-1313299/"]My Build thread[/URL]

Molon Labe
Molonlabemike is offline   Reply With Quote
Unread 11-30-2012, 03:57 PM   #9
zboss86
Registered User
2001 TJ Wrangler 
 
Join Date: Oct 2010
Location: Tupelo
Posts: 242
Quote:
Originally Posted by Molonlabemike View Post
Love the design, any shots of how the back side looks and mounts up?

Sent from my iPhone using JeepForum
thx, not yet... but I should by the end of the weekend.
zboss86 is offline   Reply With Quote
Unread 11-30-2012, 09:39 PM   #10
Molonlabemike
Registered User
1997 TJ Wrangler 
 
Join Date: Oct 2011
Location: Rancho Chuchamonga, CA
Posts: 549
Quote:
Originally Posted by zboss86 View Post
thx, not yet... but I should by the end of the weekend.
Sound great
__________________
[URL="http://www.jeepforum.com/forum/f22/yota-jeep-my-build-1313299/"]My Build thread[/URL]

Molon Labe
Molonlabemike is offline   Reply With Quote
Unread 12-02-2012, 04:32 PM   #11
zboss86
Registered User
2001 TJ Wrangler 
 
Join Date: Oct 2010
Location: Tupelo
Posts: 242
Built some frame tie-ins for the bumper. I have some shots of the back and a few other angles. I definitely learned a lot from this build... I could the next one stronger, cleaner, and a lot faster. But I'm having fun and getting better, so that's what matters.

I still got to add in the clevis mounts and the trailer receiver. I'm going to round off the sharp edges a little bit, clean it up, prime it, and spray it with some bed liner like I did the front bumper.

My shop is part of series of storage units. Two of the next door units got broke into to a couple weeks back, so my next project will be a steel security cage to lock my welder, plasma, and expensive hand tools in. After that, I'm going to get started on a tire carrier.
image-1083619163.jpg   image-2235362485.jpg   image-845302273.jpg   image-1746731890.jpg   image-1926645909.jpg  

__________________
Cleaning out the garage... check what I have for sale here:
http://midsouthjeeps.com/forum/index.php?/topic/20693-jeep-parts-for-saletradebumper-2-spacers-relocation-brackets/
zboss86 is offline   Reply With Quote
Unread 12-02-2012, 05:07 PM   #12
jrallen
Registered User
2000 TJ Wrangler 
 
Join Date: Jun 2011
Location: Prattville, Alabama
Posts: 710
Lools pretty sweet! Why not build it so it's sandwiched between the body mounts and the frame instead of cutting it to fit around the mounts?
jrallen is offline   Reply With Quote
Unread 12-02-2012, 05:16 PM   #13
zboss86
Registered User
2001 TJ Wrangler 
 
Join Date: Oct 2010
Location: Tupelo
Posts: 242
Quote:
Originally Posted by jrallen View Post
Lools pretty sweet! Why not build it so it's sandwiched between the body mounts and the frame instead of cutting it to fit around the mounts?
Yeah, it'd look better, one of those things I'd change if I was to do over..
zboss86 is offline   Reply With Quote
Unread 12-02-2012, 05:55 PM   #14
jrallen
Registered User
2000 TJ Wrangler 
 
Join Date: Jun 2011
Location: Prattville, Alabama
Posts: 710
Quote:
Originally Posted by zboss86 View Post

Yeah, it'd look better, one of those things I'd change if I was to do over..
Ohh, I'm not worried about the looks. I think it looks great! I just know that it'd be stronger, especially if you plan to use it for any kind of recovery.
jrallen is offline   Reply With Quote
Unread 12-02-2012, 06:20 PM   #15
zboss86
Registered User
2001 TJ Wrangler 
 
Join Date: Oct 2010
Location: Tupelo
Posts: 242
Didn't even think about it being stronger... I saw it cut like that on the one that poison spyder does. Monkey see monkey do(or try).

I'm also going to make a mount to the center where the trailer hitch ties in...

You guys must do some serious yank'n on the recovery, LOL
__________________
Cleaning out the garage... check what I have for sale here:
http://midsouthjeeps.com/forum/index.php?/topic/20693-jeep-parts-for-saletradebumper-2-spacers-relocation-brackets/
zboss86 is offline   Reply With Quote




Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.