Home |
Search |
Today's Posts |
|
Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
Reply |
|
LinkBack | Thread Tools | Display Modes |
#1
|
|||
|
|||
Home Brew Spot Werlder
Anybody here ever built your own spot welder? I've got some major
re-assembly work coming up on my jeep tub & I've been thinking it might be easier/faster to do real spot welds instead of the "drill hole/mig weld plug/grind down" route. I've found a few references on google to plans for units using re-wound microwave oven transformers, intended for use on small projects such as model gas turbines, but there isn't enough detail to convince me they'd work on heavier sheet metal. So, if you have any experience with something like this or know of any on-line resources that google (Gasp!) doesn't know about I'd appreaciate hearing from you. Thanks, Howard. |
#2
|
|||
|
|||
Home Brew Spot Werlder
A long time ago, I built a spot weldor using some 1 kw variac cores
and a single turn made of aluminum that pretty much filled the hole in the center of the variac cores. It was plenty powerful enough. I crossed two 3/8 th bolts and applied pressure and current. It welded them into a cross with the bolts almost in the same plane. About four microwave oven transformer cores ought to be roughly equivalent. You will have to wire the primaries in series/parallel and use 240 volts to avoid popping a 120 volt breaker. Dan Howard Eisenhauer wrote in message . .. Anybody here ever built your own spot welder? I've got some major re-assembly work coming up on my jeep tub & I've been thinking it might be easier/faster to do real spot welds instead of the "drill hole/mig weld plug/grind down" route. I've found a few references on google to plans for units using re-wound microwave oven transformers, intended for use on small projects such as model gas turbines, but there isn't enough detail to convince me they'd work on heavier sheet metal. So, if you have any experience with something like this or know of any on-line resources that google (Gasp!) doesn't know about I'd appreaciate hearing from you. Thanks, Howard. |
#3
|
|||
|
|||
Home Brew Spot Werlder
Harborfreight is selling a 220V one for about $150.
If you want precision timing on it I'll send you a schematic of the one I designed/built for the welder. Simon Shabtai Evan Howard Eisenhauer wrote: Anybody here ever built your own spot welder? I've got some major re-assembly work coming up on my jeep tub & I've been thinking it might be easier/faster to do real spot welds instead of the "drill hole/mig weld plug/grind down" route. I've found a few references on google to plans for units using re-wound microwave oven transformers, intended for use on small projects such as model gas turbines, but there isn't enough detail to convince me they'd work on heavier sheet metal. So, if you have any experience with something like this or know of any on-line resources that google (Gasp!) doesn't know about I'd appreaciate hearing from you. Thanks, Howard. |
#4
|
|||
|
|||
Home Brew Spot Werlder
SimonShabtai Evan wrote:
Harborfreight is selling a 220V one for about $150. If you want precision timing on it I'll send you a schematic of the one I designed/built for the welder. Simon Shabtai Evan Howard Eisenhauer wrote: Anybody here ever built your own spot welder? I've got some major re-assembly work coming up on my jeep tub & I've been thinking it might be easier/faster to do real spot welds instead of the "drill hole/mig weld plug/grind down" route. I've found a few references on google to plans for units using re-wound microwave oven transformers, intended for use on small projects such as model gas turbines, but there isn't enough detail to convince me they'd work on heavier sheet metal. So, if you have any experience with something like this or know of any on-line resources that google (Gasp!) doesn't know about I'd appreaciate hearing from you. Thanks, Howard. Could you also send me a copy of the schematic. I built a timer several years ago, and would like to see what your approach was. |
#5
|
|||
|
|||
Home Brew Spot Werlder
I'm sure a lot of people would want to see it - can you post it to the
drop-box at www.metalworking.com TIA Tom SimonShabtai Evan wrote in message news:UKHhc.970$YP5.159734@attbi_s02... Harborfreight is selling a 220V one for about $150. If you want precision timing on it I'll send you a schematic of the one I designed/built for the welder. Simon Shabtai Evan Howard Eisenhauer wrote: Anybody here ever built your own spot welder? I've got some major re-assembly work coming up on my jeep tub & I've been thinking it might be easier/faster to do real spot welds instead of the "drill hole/mig weld plug/grind down" route. I've found a few references on google to plans for units using re-wound microwave oven transformers, intended for use on small projects such as model gas turbines, but there isn't enough detail to convince me they'd work on heavier sheet metal. So, if you have any experience with something like this or know of any on-line resources that google (Gasp!) doesn't know about I'd appreaciate hearing from you. Thanks, Howard. |
#6
|
|||
|
|||
Home Brew Spot Werlder
We had one of these at work when I was a kid, it worked great on body
panels: http://cgi.ebay.com/ebaymotors/ws/eB...3ADS%3AUS%3A28 Since you already have a welder; something like this would probably be quicker, cheaper, easier than building something from scratch. The Eastwood Co sells them brand new for $60: http://www.eastwoodco.com/shopping/p...ProductID=1227 David "Howard Eisenhauer" wrote in message ... Anybody here ever built your own spot welder? I've got some major re-assembly work coming up on my jeep tub & I've been thinking it might be easier/faster to do real spot welds instead of the "drill hole/mig weld plug/grind down" route. I've found a few references on google to plans for units using re-wound microwave oven transformers, intended for use on small projects such as model gas turbines, but there isn't enough detail to convince me they'd work on heavier sheet metal. So, if you have any experience with something like this or know of any on-line resources that google (Gasp!) doesn't know about I'd appreaciate hearing from you. Thanks, Howard. |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
OT- I thought Bush on imigration was evil? | Metalworking | |||
Question on Miller Spot welder tips | Metalworking |