All MetalShaping

Go Back   All MetalShaping > Metal Shaping Projects > Automotive Projects
  Today's Posts Posts for Last 7 Days Posts for Last 14 Days  

Reply
 
Thread Tools Search this Thread Display Modes
  #701  
Old 05-14-2017, 03:41 AM
Gojeep's Avatar
Gojeep Gojeep is offline
MetalShaper of the Month March 2015, March 2020,, June 2022,Aug 2023
 
Join Date: Nov 2013
Location: Eastern Melbourne, Australia
Posts: 2,986
Default


I had some wheeling marks that I had to get rid of. Didn't want to stretch it more as already had too much crown at one end. It would have been at my end when wheeling as Peter noticed I was not holding the sheet high enough so it caused more crown and the tracking marks to occur. All part of the learning process. To remove the marks I pressed the sheet out flat and hammered down with the wooden mallet or nylon hammer. Also used the flat faced hammer over the rubber block when it was up the other way. So long as one side has give it will reduce stretching while hammering.


To let more crown out on the high side I slightly stretched, using hammer on dolly, along the edge where it was higher. A crown is always framed along the edge by a less stretched or a shrunken edge. If a panel is wheeled the same right to the very edge, it would actually not crown and just be a bigger thinner sheet.


So this is how it is sitting having scribed around the edge of the sheet and then cutout the perimeter. It is now sitting on the supports with the blocks on it which worked well as could slide them to change the height until the edges aligned.


Where there was no gap I tacked first. This pulls the part where there is a little gap closed with the shrinkage. I used a 1mm cutoff wheel to shave down the tacks top and bottom until a razor blade thickness was still proud so it could be hammered flat to remove any shrinkage.


This a quick rundown of my setup on the tig. The metal is 0.9mm and so the tungsten, with 2% lanthanated, is the same thickness along with the 0.9mm mig wire used as a filler. The torch angle to wire is kept around 90* to each other. I just drag the wire along in front of the weld pool and it just gets drawn in, in a little trail. I only want a little as more just means more grinding. Sometimes I even use the lay wire technique with 0.6mm wire where I place the wire over the join and it just melts into it as you travel along.


I just start at one end and go as far as I can without stopping. Re-position myself and keep going.


Where the panel sits high after welding I planish the weld down with a flipper or flat face hammer with a dolly directly underneath to stretch it. More force is applied hitting down than pushing up with the dolly. Where it is low I push up harder with the dolly than hammering down to lift the panel while stretching. The panel will move either way depending in which direction more force is being applied


I also sometimes find it easier to hit up from underneath using a hammer with a higher crown directly on the weld with a dolly on edge above it. This lets you know by the sound that you are hitting in the right spot when you can't see the hammer.


I had this low spot in one corner even before tacking. This was only going to get worse after welding the seam.


After stretching the weld back out again I hit directly up with a high crown hammer making these nice lumps!


Started to smooth out the lumps using hammer on dolly to even it out.


Switched to using the flipper while pushing up from underneath with a matching crown dolly to smooth it out even more.


Another side welded. Can see the waves caused by the weld shrinking.


The waves disappeared again even though only the weld was hammered. See it like pulling a drawstring bag closed while welding and then it flattening out when you stretch it back again.


It was suggested to me to do the straights first and leave the corners until last to make it easier to control the distortion. After each side was done I stretched and planished the side until it was back to the way it was before welding.


I have done the corners now and all went well. So would use this technique again. I still have a lot of work ahead of me making the crown even as was not quite there before welding it in either. Just struggled on my own to get it right when it was flopping around. Hoping now it is complete it will be easier to get right. No oil canning at all so at least that is in my favour.
__________________
Marcus
aka. Gojeep
Victoria, Australia
http://willyshotrod.com

Invention is a combination of brains and materials.
The more brains you use, the less materials you need.

Last edited by Gojeep; 08-14-2017 at 04:34 AM.
Reply With Quote
  #702  
Old 05-14-2017, 04:21 AM
123pugsy's Avatar
123pugsy 123pugsy is offline
MetalShaper of the Month Dec. 2019, Feb. 2022
 
Join Date: May 2009
Location: Markham,ON
Posts: 2,165
Default

Thanks.

That looks really good.
__________________
Pugsy

my project:
http://www.allmetalshaping.com/showthread.php?t=154
Reply With Quote
  #703  
Old 05-14-2017, 05:42 AM
galooph galooph is offline
Administrator
 
Join Date: Oct 2011
Location: Alsager, United Kingdom
Posts: 903
Default

That's looking fantastic! You make it look so easy, top skills

What current did you use on the TIG?
__________________
Dan Smith
https://galooph.com/
Reply With Quote
  #704  
Old 05-15-2017, 02:28 AM
skintkarter skintkarter is offline
MetalShaper of the Month Nov. 2018, Jan. 2021
 
Join Date: Feb 2013
Location: Auckland New Zealand
Posts: 877
Default

Top job Marcus!
__________________
Richard
"I know nothing. I from Barcelona" (Manuel - Fawlty Towers)
Link to our racecar project https://www.facebook.com/pages/Elan-...ab=public&view
Reply With Quote
  #705  
Old 05-15-2017, 02:28 AM
Charlie Myres Charlie Myres is offline
Member
 
Join Date: Jun 2013
Location: Narrogin, Western Australia
Posts: 579
Default

What a ripping job, with a first class description as well!

Cheers Charlie
Reply With Quote
  #706  
Old 05-15-2017, 05:45 AM
Gojeep's Avatar
Gojeep Gojeep is offline
MetalShaper of the Month March 2015, March 2020,, June 2022,Aug 2023
 
Join Date: Nov 2013
Location: Eastern Melbourne, Australia
Posts: 2,986
Default

Quote:
Originally Posted by galooph View Post
That's looking fantastic! You make it look so easy, top skills

What current did you use on the TIG?
No idea what current I use I'm afraid as all controlled by the foot pedal and never change its maximum setting. I only weld the 0.9 and 1.2mm steel with the tig so far.
__________________
Marcus
aka. Gojeep
Victoria, Australia
http://willyshotrod.com

Invention is a combination of brains and materials.
The more brains you use, the less materials you need.
Reply With Quote
  #707  
Old 05-15-2017, 05:47 AM
Gojeep's Avatar
Gojeep Gojeep is offline
MetalShaper of the Month March 2015, March 2020,, June 2022,Aug 2023
 
Join Date: Nov 2013
Location: Eastern Melbourne, Australia
Posts: 2,986
Default

Many thanks for all the comments.
__________________
Marcus
aka. Gojeep
Victoria, Australia
http://willyshotrod.com

Invention is a combination of brains and materials.
The more brains you use, the less materials you need.
Reply With Quote
  #708  
Old 05-16-2017, 09:34 AM
heinke's Avatar
heinke heinke is offline
MetalShaper of the Month Jan 2018
 
Join Date: Nov 2009
Location: Prescott, AZ
Posts: 487
Thumbs up

Great job Marcus! I find your attention to detail to be very inspiring.
__________________
Joel Heinke
Be original; don't be afraid of being bold!
Reply With Quote
  #709  
Old 05-16-2017, 11:06 AM
Steve Hamilton's Avatar
Steve Hamilton Steve Hamilton is offline
ADMINISTRATOR MetalShaper of the Month Dec. '09 & May '11
 
Join Date: May 2009
Location: Fond du Lac WI.
Posts: 2,405
Default

Hi Marcus

your roof skin looks fantastic!!!!!

thanks for sharing all the photos and explanations.

Steve
__________________
Steve Hamilton
Hamilton Classics
Auto Restoration & Metalshaping
Reply With Quote
  #710  
Old 05-17-2017, 03:57 AM
Gojeep's Avatar
Gojeep Gojeep is offline
MetalShaper of the Month March 2015, March 2020,, June 2022,Aug 2023
 
Join Date: Nov 2013
Location: Eastern Melbourne, Australia
Posts: 2,986
Default

Many thanks Steve and Joel. Found some new techniques, to me, this week in finishing off the roof skin, so will pass them on in case others don't know about them.
__________________
Marcus
aka. Gojeep
Victoria, Australia
http://willyshotrod.com

Invention is a combination of brains and materials.
The more brains you use, the less materials you need.
Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump

All times are GMT -5. The time now is 07:54 PM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.