Shop Floor Talk  

Go Back   Shop Floor Talk > Welding and Metalworking Forums > Welding

SFT Search:   
Reply
 
Thread Tools Display Modes
  #1  
Old 11-18-2018, 08:22 PM
MetalWolf's Avatar
MetalWolf MetalWolf is offline
Lubrication Consultant
 
Join Date: Jan 2011
Location: La Vernia,Tx.
Posts: 3,434
Default Advice on making a plasma height guide

I have a horse trailer I am going to do some sheet metal repair on in the front bottom and need some ideas of an adjustable guide up to 24"

this guide will need to be able to roll at bottom of angle rail and adjust to the Hight of the cut as I will be cutting through two pieces of 20Ga sheet steel at same time this way the two pieces are the same cut the new steel while cutting out the old piece in a since similar to a height gauge so do any of you have one you ad or something to go by I will prolly make two one from 4 to 10" and one from 12 to 20 or 24 inches in adjustable height
just looking for some ideas from others basic and simple.
__________________
MetalWolf, AKA---- Metallic Shapeshifter-----

I Have Only One Wish, To Achieve "Pura Vida" In All That I Do!
Reply With Quote
  #2  
Old 11-18-2018, 08:26 PM
digger doug's Avatar
digger doug digger doug is offline
Not to be used as a Flotation Device
 
Join Date: Jan 2008
Location: NW Pa
Posts: 11,696
Default

I'm lost on the exact use (2nd paragraph I got woozy)

But I would suggest shallow (5/8" high) unistrut.

You can slide a bracket along it, and clamp it anywhere.

Maybe a round tube tack welded to a bracket, that the torch
body slips into.
Reply With Quote
  #3  
Old 11-18-2018, 08:40 PM
digr's Avatar
digr digr is online now
The Real Deal
 
Join Date: Apr 2005
Location: Duluth MN
Posts: 8,080
Default

Two inch banding material or thin FB and rare earth magnets
Attached Thumbnails
Click image for larger version

Name:	mag.jpg
Views:	63
Size:	24.8 KB
ID:	148206  
__________________
Drawing by Smartdraw
Reply With Quote
  #4  
Old 11-18-2018, 10:49 PM
MetalWolf's Avatar
MetalWolf MetalWolf is offline
Lubrication Consultant
 
Join Date: Jan 2011
Location: La Vernia,Tx.
Posts: 3,434
Default

OK so here is what I'm talking about I've made several odd and end sizes of these tools if you want to call it that, but all are like this one I just whipped out to do this one job with I have 5 trailers I need to do this on for people
And all are different in the amount I need to remove..

In principal its similar to a DIY circle burner but I am looking for something that can be adjustable and its not just for one set height

So depending on how much of the sheet metal in the front radius I will need to remove

the nub is to help hold while you drag the plasma torch the flat bar welded to the back side it the trailer to sit on the edge to drag against the bottom rail
the hole is for the torch drag tip with a ground relief so tip don't build up slag particles found the relief seems to of stopped the build up that would cause the arc to blow side ways and makes for a cleaner cut.

I don't want to have to stop an make one for each specific height and think there is a way to make it simple adjustable..
Click image for larger version

Name:	DSCN0144.jpg
Views:	82
Size:	179.6 KB
ID:	148212Click image for larger version

Name:	DSCN0139.jpg
Views:	83
Size:	196.2 KB
ID:	148213Click image for larger version

Name:	DSCN0136.jpg
Views:	77
Size:	193.2 KB
ID:	148214Click image for larger version

Name:	DSCN0137.jpg
Views:	74
Size:	183.0 KB
ID:	148215Click image for larger version

Name:	DSCN0141.jpg
Views:	67
Size:	192.9 KB
ID:	148216
__________________
MetalWolf, AKA---- Metallic Shapeshifter-----

I Have Only One Wish, To Achieve "Pura Vida" In All That I Do!

Last edited by MetalWolf; 11-18-2018 at 10:55 PM.
Reply With Quote
  #5  
Old 11-18-2018, 11:55 PM
Ironman's Avatar
Ironman Ironman is offline
Iron Modification Investigator
 
Join Date: Feb 2008
Location: Warburg, Alberta, Canada
Posts: 13,710
Default

You mean like this?
My torch circle burner has two wheels on each side for height, and could be adapted to a plasma cutter.
__________________
Gerry
You got freedom of speech, if you don't say too much.
Aaron Neville

"I must abide by my core values, my ethical responsibilities and constitutional obligations. There can be a cost to acting on one’s principles, but there is a bigger cost to abandoning them.” Jane Philpott
Reply With Quote
  #6  
Old 11-19-2018, 03:49 AM
MetalWolf's Avatar
MetalWolf MetalWolf is offline
Lubrication Consultant
 
Join Date: Jan 2011
Location: La Vernia,Tx.
Posts: 3,434
Default

Not quite the radius I am talking about is the front of a horse trailer how the nose is rounded the tool must ride on the bottom edge rail and torch will follow the tool in the hole drilled to make the cut strait

but I have to make one for each time I have to do this cut out depending on how high up I need to cut out the bad sheet metal.

I wrap the new metal just behind that on the inside so when I make the cut the new piece is exactly as the piece cut out then just have to fit it and start tacking it in until I have it a perfect fit

then do a little grinding and use a flap wheel for finish out this way any fill work is done with glass and is just mills thick if it is even needed as the paint will usually do all the fill for the most part.

here Is a general pic so to get the idea of the way the tool needs to work or follow kind of like taking a speed square and holding the pencil to drag and draw a straight line at a correct measurement..
Click image for larger version

Name:	red-trailer-with-a-escape-door.jpg
Views:	71
Size:	152.0 KB
ID:	148217
__________________
MetalWolf, AKA---- Metallic Shapeshifter-----

I Have Only One Wish, To Achieve "Pura Vida" In All That I Do!
Reply With Quote
  #7  
Old 11-19-2018, 06:13 AM
toprecycler's Avatar
toprecycler toprecycler is online now
Elite Member
 
Join Date: Jan 2009
Location: Petoskey, Michigan
Posts: 3,901
Default Advice on making a plasma height guide

Do you have a circle burner jig? I think that would work for you. You might want to make a different end that would follow the bottom of the trailer, helping you keep the cut straight.

I have made my own using a piece of 3/8” round rod as the main part. Make adjustable end for each end. One end has a tube that the plasma torch goes in, the other end has the circle point.

Replace the circle point with something to follow the trailer.
Here’s couple pics of what I whipped up for my circle burning jig. Crude but it works.Click image for larger version

Name:	IMG_6625.JPG
Views:	77
Size:	180.1 KB
ID:	148218Click image for larger version

Name:	IMG_6624.JPG
Views:	77
Size:	165.8 KB
ID:	148219

I put another small pipe on the end with the plasma end to hold a pencil or marker to use as a compass. Just put as long as a round god in to make the size circle I need.

Sent from my iPhone using ShopFloorTalk mobile app
__________________
Brian

You don't know what you don't know.

"It's what you learn after you know it all that counts." John Wooden

Last edited by toprecycler; 11-19-2018 at 06:22 AM.
Reply With Quote
  #8  
Old 11-19-2018, 07:22 AM
digger doug's Avatar
digger doug digger doug is offline
Not to be used as a Flotation Device
 
Join Date: Jan 2008
Location: NW Pa
Posts: 11,696
Default

Could make it with 2 straps that hinge, like a pair of calipers.
That would give you the pivot trailing behind (double nut
a longer bolt for the pivot, that ,makes your handle)

Make the square piece on a pivot bolt to adjust for square to the hole
(that the plasma tip rides in)
'Cause as you adjust it more open, you want the flat (on the sq. piece)
to always point to the circle hole.
Reply With Quote
  #9  
Old 11-19-2018, 10:24 AM
dubby's Avatar
dubby dubby is offline
Director: Fish Seduction
 
Join Date: Apr 2006
Location: Lubbock, TX
Posts: 9,399
Default

I see what you're doing, but havn't had enough coffee to explain how I'd 'fix' it yet.

You're needing a flexible burn guide more than what I'd call a height guide I think. I googled a pic, I'll let the more awake people explain how to build it for your situation.
Attached Thumbnails
Click image for larger version

Name:	tips-7.jpg
Views:	88
Size:	148.1 KB
ID:	148220  
__________________
I've always had more time than money.

Wade's Custom Kydex
Reply With Quote
  #10  
Old 11-19-2018, 11:00 AM
digger doug's Avatar
digger doug digger doug is offline
Not to be used as a Flotation Device
 
Join Date: Jan 2008
Location: NW Pa
Posts: 11,696
Default

I think the term "Height" thru me off.

"Offset" would be a better description IMHO
Reply With Quote
Reply

Thread Tools
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 Off

Forum Jump

Web Search:

All times are GMT -5. The time now is 02:22 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.