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Sept 23, 2006 11:31:16 GMT
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Greetings  So, i've got this kind of situation:  And i need to replace it with this:  What i want to know is what do people use, or how do they go about cutting out the old arch. I'll be trimming the repair panel down (so someone in years to come can replace it again using a bit more metal of course  ) But once i know where i need to cut the old arch how do i go about cutting a nice clean edge for butt welding to? |
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slater
Club Retro Rides Member
Posts: 6,390
Club RR Member Number: 78
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Cutting it: Metalworkslater
@slater
Club Retro Rides Member 78
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Sept 23, 2006 12:48:53 GMT
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A Nibbler is probably your best bet for that, thats what id use i think.
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Sept 23, 2006 12:49:11 GMT
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Erm, i just thought I'd butt in here and say "yeah I'd like to know that too!". Not much help I know, but I'm just about to go and buy some outer sills for the Astra and make a hash of putting them on. Is it a case of holding the repair panel up to the car and drawing around it, and wading in with a cutting disc or is more scientific? |
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Never trust a man
Who names himself Trevor.
Or one day you might find
He's not a real drug dealer.
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Sept 23, 2006 13:10:03 GMT
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I would probably use an air nibbler (which I don't own) or an angle grinder with a cutting disc.
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John
Part of things
Posts: 347
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Sept 23, 2006 13:52:38 GMT
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Get some 1mm thick cutting discs for your angle grinder. These are the business and will make short work of cutting. They last quite well too.
Once you have used them you will wonder how you managed without them.
John
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Sept 23, 2006 14:11:12 GMT
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is that on a polo?
i'd probably go for 1mm cutting disc too. you can even get 0.8 ones for stainless steel.
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Sept 23, 2006 16:46:50 GMT
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an air saw is also a use full tool, but only if you have a compressor....
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Sept 23, 2006 17:31:12 GMT
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1mm cutting disc in a grinder. It does a neater job than the normal 3mm discs. Nothing fancy.
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Sept 23, 2006 17:41:01 GMT
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I hace a tool called aq "rotozip" or something which is like a drill but it cuts. A bit bigger than a dremel. Well, a lot bigger than a dremel but not as big as a proper drill. circular cutting bit, can cut quite acurately. Makes a horrible noise though! A real scream. And only really good on fairly thin metal - body panels are usually fine but not chassis.
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1941 Wolseley Not Rod - 1956 Humber Hawk - 1957 Daimler Conquest - 1966 Buick LeSabre - 1968 Plymouth Sport Fury - 1968 Ford Galaxie - 1969 Ford Country Squire - 1969 Mercury Marquis - 1970 Morris Minor - 1970 Buick Skylark - 1970 Ford Galaxie - 1971 Ford Galaxie - 1976 Continental Mark IV - 1976 Ford Capri - 1994 Ford Fiesta
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slater
Club Retro Rides Member
Posts: 6,390
Club RR Member Number: 78
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Cutting it: Metalworkslater
@slater
Club Retro Rides Member 78
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Sept 23, 2006 18:08:54 GMT
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Trouble with cutting discs is they don't relly like cutting curves! Otherwise yeh they work well.
Air saw/sawzall is another viable tool but i find if they get snagged up (which they do) it can put a crease in the panel!
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Sept 23, 2006 19:25:02 GMT
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A small air cut-off saw with a 1mm disc is OK for cutting curves but a nibler will make a neater job. About time I got myself one really ;D
I'd probably trim that new panel down a bit too.
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1962 Datsun Bluebird Estate - 1971 Datsun 510 SSS - 1976 Datsun 710 SSS - 1981 Dodge van - 1985 Nissan Cherry Europe GTi - 1988 Nissan Prairie - 1990 Hyundai Pony Pickup - 1992 Mazda MX5
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Sept 23, 2006 19:34:29 GMT
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I've got a 'monodex cutter' thing which seems to cut very neatly and internal radii are no problem for it either. Its a bit slow though, and you need a strong right hand, luckily mine is very strong etc etc.
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1972 Fiat 130 1985 Talbot Alpine 1974 Lancia Beta Saloon 1975 + 1986 Mazda 929 Koop + Wagon 1982 Fiat Argenta 2.0 iniezione elettronica 1977 Toyota Carina TA14 BEST CAR EVER!!!!!!!! 1979 Datsun B310 Sunny 4-dr 1984 Audi 200 Quattro Turbo 1983 Honda Accord 1.6 DX GONE1989 Alfa 75 2.0 TS Mr T says: TREAT YO MOTHER RIGHT! |
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Sept 23, 2006 19:35:58 GMT
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Actually that leads onto another question, is butt-welding the best way to stitch these arches in? I always overlap them, by the smallest amount possible like but still a small overlap with the wheelarch on the outside.
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1972 Fiat 130 1985 Talbot Alpine 1974 Lancia Beta Saloon 1975 + 1986 Mazda 929 Koop + Wagon 1982 Fiat Argenta 2.0 iniezione elettronica 1977 Toyota Carina TA14 BEST CAR EVER!!!!!!!! 1979 Datsun B310 Sunny 4-dr 1984 Audi 200 Quattro Turbo 1983 Honda Accord 1.6 DX GONE1989 Alfa 75 2.0 TS Mr T says: TREAT YO MOTHER RIGHT! |
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Sept 23, 2006 19:52:55 GMT
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Actually that leads onto another question, is butt-welding the best way to stitch these arches in? I always overlap them, by the smallest amount possible like but still a small overlap with the wheelarch on the outside. I'd joggle a step in the new panel and have an overlap (new panel inside of old) It ads strength to the join and helps reduce the chance of warpage when welding. Done well it shopuld need very little filler. Only thing to watch for is condensation running into the overlap on the inside later on and causeing rust. Seal it up or lots of waxoyl will do the trick. I have seen new arches bonded in but i've never tried that myself. Got to say though, I hate doing arch repair panels like this. I'd rather fit a whole new rear quarter than just an arch! |
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1962 Datsun Bluebird Estate - 1971 Datsun 510 SSS - 1976 Datsun 710 SSS - 1981 Dodge van - 1985 Nissan Cherry Europe GTi - 1988 Nissan Prairie - 1990 Hyundai Pony Pickup - 1992 Mazda MX5
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slater
Club Retro Rides Member
Posts: 6,390
Club RR Member Number: 78
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Cutting it: Metalworkslater
@slater
Club Retro Rides Member 78
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Sept 23, 2006 19:58:15 GMT
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Id joggle too, much neater. Just make sure you joggle the car rather then the arch as that will help stopping it filling with water.
I'm just amased how the one your doing there semes to have the inner arch perfectly intact!
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Sept 23, 2006 21:04:28 GMT
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plasma cutter great fun just don't get carried away or you'll end up with you car in bits ;D
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Sept 23, 2006 21:11:07 GMT
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Actually that leads onto another question, is butt-welding the best way to stitch these arches in? I always overlap them, by the smallest amount possible like but still a small overlap with the wheelarch on the outside. I normally overlap with the arch outside as well, and if there is no inner arch then weld the inside edge as well. Probably better with a joggler, but I don't own one, and its one of those tools I always promise myself but never get around to buying. |
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Sept 23, 2006 21:41:17 GMT
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Only reason I often overlap it the other way is there often isn't room for the joggler head between the outer and inner arches down near the bottom of the arch whereas you can work the replacement arch all the way round. Whichever way you do it seal the overlap inside though otherwise you're asking for ploblems later.
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1962 Datsun Bluebird Estate - 1971 Datsun 510 SSS - 1976 Datsun 710 SSS - 1981 Dodge van - 1985 Nissan Cherry Europe GTi - 1988 Nissan Prairie - 1990 Hyundai Pony Pickup - 1992 Mazda MX5
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Nick
Posted a lot
Posts: 2,483
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Sept 24, 2006 2:01:43 GMT
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i'm excellent at cutting curse word out of cars, my weapon of choice whatever cutting disc on whatever grinder. see my stagnant celica supra project thread for some of the demolition i am capable of when bored.
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idea stolen from rattely eddie.
this weeks car count "5"
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