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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. |
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#1
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Tungsten Grinding
I don't have a bench grinder but i do have an angle grinder to sharpen
thoriated tungsten electrodes. I'm having problems with the arc it seems to create bright pulsing flashes making it very difficult for me to see the arc and weld puddle. is this caused by a contaminated tungsten electrode? OR is that what happens when the tungsten electrode is contaminated with other metal bits from the grinding stone? perhaps my angle grinder isn't clean enough and contains some steel/ aluminum bits which contaminated the electrode. |
#2
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Tungsten Grinding
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#3
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Tungsten Grinding
On Mon, 21 Apr 2008 12:15:35 -0500, Jon Elson wrote:
wrote: I don't have a bench grinder but i do have an angle grinder to sharpen thoriated tungsten electrodes. I'm having problems with the arc it seems to create bright pulsing flashes making it very difficult for me to see the arc and weld puddle. is this caused by a contaminated tungsten electrode? OR is that what happens when the tungsten electrode is contaminated with other metal bits from the grinding stone? perhaps my angle grinder isn't clean enough and contains some steel/ aluminum bits which contaminated the electrode. Yes, you should use a special grinder (or at least the wheel) for grinding the tungstens. A trick I use is to hold the torch such that the cup shields my eyes from the brightest part of the arc, usually right at the tip of the electrode. Then, the arc lights up the work and I can usually see the puddle quite nicely. I usually do sort of micro-welding and get right up there with my nose inches from the arc. Jon A very cheap 6" grinder from Harbor Freight etc etc is probably the way the OP wants to go. Set on top of the welder, with the cord plugged into the 110vt output plug, its very handy and wont be used for anything else. And the wheels are "good enough" A grinder (old Souix) lives on the top of my big Airco Squarewave 300 for just such a reason. I still use it far far too much...damnit. I buy and sell welders on occasion, and build carts and table tops to put on nearly all of them, and make sure there is a place for a small cabinet for consumables, and a place for a grinder everytime. Shrug, works for me..your mileage may vary. Oh..if you put it on the metal top of the welding machine..a piece of carpet under the grinder, fuzzy side down, keeps the entire machine from vibrating from the grinder Gunner, who just got a Lincoln Squarewave 300 this weekend. And all the factory schematics and receipts for all new boards. And the pedal. No torch though...sigh "[L]iberals are afraid to state what they truly believe in, for to do so would result in even less votes than they currently receive. Their methodology is to lie about their real agenda in the hopes of regaining power, at which point they will do whatever they damn well please. The problem is they have concealed and obfuscated for so long that, as a group, they themselves are no longer sure of their goals. They are a collection of wild-eyed splinter groups, all holding a grab-bag of dreams and wishes. Some want a Socialist, secular-humanist state, others the repeal of the Second Amendment. Some want same sex/different species marriage, others want voting rights for trees, fish, coal and bugs. Some want cradle to grave care and complete subservience to the government nanny state, others want a culture that walks in lockstep and speaks only with intonations of political correctness. I view the American liberals in much the same way I view the competing factions of Islamic fundamentalists. The latter hate each other to the core, and only join forces to attack the US or Israel. The former hate themselves to the core, and only join forces to attack George Bush and conservatives." --Ron Marr |
#4
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Tungsten Grinding
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#5
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Tungsten Grinding
well, i do prefer watching the arc and the puddle since i have a eye
protection anyway. but the flashes are just too bright even when wearing dark lenses. maybe the there's some steel bits on my tungsten which then got vaporized and lit.... i dunno if that's what happens when steel vaporizes. i guess i'll just have to try to use a "clean" and dedicated grinding stone for my tungsten electrodes then see if that still happens. On Apr 22, 1:15 am, Jon Elson wrote: wrote: I don't have a bench grinder but i do have an angle grinder to sharpen thoriated tungsten electrodes. I'm having problems with the arc it seems to create bright pulsing flashes making it very difficult for me to see the arc and weld puddle. is this caused by a contaminated tungsten electrode? OR is that what happens when the tungsten electrode is contaminated with other metal bits from the grinding stone? perhaps my angle grinder isn't clean enough and contains some steel/ aluminum bits which contaminated the electrode. Yes, you should use a special grinder (or at least the wheel) for grinding the tungstens. A trick I use is to hold the torch such that the cup shields my eyes from the brightest part of the arc, usually right at the tip of the electrode. Then, the arc lights up the work and I can usually see the puddle quite nicely. I usually do sort of micro-welding and get right up there with my nose inches from the arc. Jon |
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