PDKJ Welding machine,Spot welding machine,laser welding machine

Thu, 01 Jan 1970 00:00:00 GMT

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Thu, 01 Jan 1970 00:00:00 GMT

Dry goods sharing of mixed gas selection during welding

mmon welding gases[/size] Argon (Ar): commonly used in TIG and MIG welding because it can provide stable arcs and clean welds. Oxygen (O ₂): Adding a small amount of oxygen during certain welding processes can increase the temperature and fluidity of the molten pool. Carbon dioxide (CO ₂): Commonly used in MIG welding when mixed with argon gas, it can improve welding speed and penetration depth. Helium (He): Although it has a high cost, it can increase the arc temperature and welding speed, making it particularly suitable for welding materials such as aluminum alloys. [size=3][color=#ff0000]Mixed gases are mainly divided into two categories: binary mixtures and ternary mixtures.[/color][/size] [b]Binary mixture[/b] A binary mixture is a gas system formed by mixing two gases in a certain proportion. In welding, common binary mixtures include the following: 1. Argon+Oxygen: Adding an appropriate amount of oxygen to argon can effectively improve arc stability and refine molten droplets. The oxygen combustion characteristics can increase the temperature of the metal in the molten pool, promote metal flow, reduce welding errors, make the weld bead smoother, accelerate welding speed, and improve welding efficiency. This mixed gas is suitable for welding various thicknesses of carbon steel, low alloy steel, and stainless steel. 2. Argon+carbon dioxide: Carbon dioxide can improve welding strength and corrosion resistance, but pure carbon dioxide protects against excessive splashing. Mixing stable argon gas can effectively reduce metal splashing rate. This mixed gas is also suitable for welding carbon steel and stainless steel. 3. Argon+Hydrogen: Hydrogen is a reducing combustion gas that can increase arc temperature, accelerate welding speed, prevent underflow, reduce the formation of CO pores, and prevent welding defects. This mixed gas has good welding effects on nickel based alloys, nickel copper alloys, and stainless steel. [b]Ternary mixture[/b] A ternary mixture is a gas system composed of three gases mixed in a certain proportion. In welding, common ternary mixtures include the following: 1. Argon+oxygen+carbon dioxide: This ternary mixture combines the advantages of argon+oxygen and argon+carbon dioxide binary mixtures, which can reduce welding spatter, improve the fluidity of the melt pool, reduce bubble generation, and improve weld quality. It can be used for welding different thicknesses of carbon steel, low alloy steel, and stainless steel, with a wide range of applications. 2. Argon+helium+carbon dioxide: This mixture can improve arc stability and operability, as well as increase the temperature of the molten pool, improve fluidity, and enhance welding quality and speed. Due to the inert nature of helium (He) and its inactive chemical properties, its oxidation effect on the weld seam is small. This mixed gas is commonly used in various types of short-circuit arc welding and overwelding. [color=#ff0000]Pay attention to the proportion of mixed gases[/color] The proportion of mixed gases directly affects the welding effect. For example, in a mixture of argon and carbon dioxide, an increase in the proportion of carbon dioxide can improve welding speed and penetration depth, but it may also increase the risk of spatter and porosity. Therefore, it is necessary to adjust the proportion of mixed gases according to specific needs. When selecting a mixed gas, factors such as the type and characteristics of welding materials, welding methods, and welding process requirements need to be considered. Different mixed gases have different characteristics and applicable ranges, which need to be selected according to specific situations. [align=center][attach]1050[/attach][/align] [align=center]Scan the QR code and follow PDKJ. PDKJ official website: [url=http://www.gd-pw.com]www.gd-pw.com[/url] Email address: [url=mailto:[email protected]][email protected][/url] National service hotline: 400-088-2398 Contact phone number: 13631767737 (same WeChat account) [/align]

Are vintage welding machines becoming like the manual transmission?

I have watched a few videos on YouTube recently and had a conversation with another welder in my age range that made me think about this. I am 34 years old and have spent my working life around old timers. Up until recently Ive always been the youngest guy in the shop. I recently brought an older 3 phase Mig welder and I mentioned to another welder my age that I really want to setup for Aluminium Mig as not every job is suited for TIG. None of my migs are pulse and his response was can you do that without pulse?, you need pulse for that? I was also telling the same guy about an old timer I know who built an aluminium fishing boat and stick welded the entire thing. His response was semi jokingly has it sunk yet? I didnt think much of it but was watching a couple of videos on YouTube and they were younger guys who were encountering big old transformer machines and the look on their faces was like a deer in headlights.They just didnt know what to do with them. In one video the welder they were used to using had presets for everything. Im a big history and vintage buff but Im starting to wonder are older welding machines going the way of the manual transmission? The jobs people weld today 99% of the time are jobs that have been done for decades and were done by people with machines far more basic than whats available today. Required Welding standards havent changed that much. Technology is great but I have often felt that a welder should be able to get an acceptable weld out of whatever machine they are given to operate unless there was something fundamentally wrong. Just surprised me thats all. What do you all think?Gear: Esab power compact 205 with tbi industries torch BOC Smootharc 185dc tig Miller Syncrowave 350LX
Reply:You can find a few old mig welders that came transformer pluss wire feeder.This type did not come with a chart 📊. All my welders was that type until my small welder that have today. The self contained type always had a chart 📊 so nice just set numbers and weldYou have to make your own chart.Lots of Fun tooDave

Originally Posted by William Payne

I have watched a few videos on YouTube recently and had a conversation with another welder in my age range that made me think about this. I am 34 years old and have spent my working life around old timers. Up until recently Ive always been the youngest guy in the shop. I recently brought an older 3 phase Mig welder and I mentioned to another welder my age that I really want to setup for Aluminium Mig as not every job is suited for TIG. None of my migs are pulse and his response was can you do that without pulse?, you need pulse for that? I was also telling the same guy about an old timer I know who built an aluminium fishing boat and stick welded the entire thing. His response was semi jokingly has it sunk yet? I didnt think much of it but was watching a couple of videos on YouTube and they were younger guys who were encountering big old transformer machines and the look on their faces was like a deer in headlights.They just didnt know what to do with them. In one video the welder they were used to using had presets for everything. Im a big history and vintage buff but Im starting to wonder are older welding machines going the way of the manual transmission? The jobs people weld today 99% of the time are jobs that have been done for decades and were done by people with machines far more basic than whats available today. Required Welding standards havent changed that much. Technology is great but I have often felt that a welder should be able to get an acceptable weld out of whatever machine they are given to operate unless there was something fundamentally wrong. Just surprised me thats all. What do you all think?
Reply:

Originally Posted by William Payne

I have watched a few videos on YouTube recently and had a conversation with another welder in my age range that made me think about this. I am 34 years old and have spent my working life around old timers. Up until recently Ive always been the youngest guy in the shop. I recently brought an older 3 phase Mig welder and I mentioned to another welder my age that I really want to setup for Aluminium Mig as not every job is suited for TIG. None of my migs are pulse and his response was can you do that without pulse?, you need pulse for that? I was also telling the same guy about an old timer I know who built an aluminium fishing boat and stick welded the entire thing. His response was semi jokingly has it sunk yet? I didnt think much of it but was watching a couple of videos on YouTube and they were younger guys who were encountering big old transformer machines and the look on their faces was like a deer in headlights.They just didnt know what to do with them. In one video the welder they were used to using had presets for everything. Im a big history and vintage buff but Im starting to wonder are older welding machines going the way of the manual transmission? The jobs people weld today 99% of the time are jobs that have been done for decades and were done by people with machines far more basic than whats available today. Required Welding standards havent changed that much. Technology is great but I have often felt that a welder should be able to get an acceptable weld out of whatever machine they are given to operate unless there was something fundamentally wrong. Just surprised me thats all. What do you all think?

Montgomery Wards diodes?
I am trying to find new, heavy duty rated diodes for my welder. It is the typical ac/dc century type. I am just trying to bullet proof it a bit. I can't see spending a lot on what was a cheapish purchase.As a beside, I seem to have a difficult time of striking arcs on it compared to the Lincoln tombstone I once had.
Reply:

Originally Posted by Nessmuk

I am trying to find new, heavy duty rated diodes for my welder. It is the typical ac/dc century type. I am just trying to bullet proof it a bit. I can't see spending a lot on what was a cheapish purchase.As a beside, I seem to have a difficult time of striking arcs on it compared to the Lincoln tombstone I once had.
Reply:https://vault.myvzw.com/webcs/QfBBqHrViw

Attached Images

Reply:I saw where other, similar welders have a low and high side for AC welding. Low is supposed to strike an arc better. Can I add that?I'm not electronically smart. I am, however, able to follow directions and replace parts.Last edited by Nessmuk; 12 Hours Ago at 03:11 PM.
Reply:

Originally Posted by 52 Ford

These guys aught to have what you need. https://www.digikey.com/Sent from my Lincoln Buzzbox using Tapatalk
Reply:Not familiar with this model but most likely need a full wave bridge similar to what they use to "convert" AC welders to "DC".  If your existing diodes are silicon rather than germanium or some other old school material - it's probably set for life.Maybe something like this? https://www.amazon.com/Single-Phase-.../dp/B07DKRQ7RF
Reply:Being 1970's tech. It has old school, stud type resistors.Do I need forward/positive and reverse/negative ones?I'm guessing it has 90amp ones in it.Alli express is about the only place I can afford 200amp. They, of course, don't mention the polarity.
Reply:It's been a long while since I did silicon electronics outside of glass tubes but I think with a FWB there's pretty much only one orientation and then you'll input AC on one side and take DC +/- from the other outputs. You might want to watch a few videos on Youtube on DC conversion to see what rectifiers they use but I think the one I shared is of the right type - trust but verify... I buy a few items from Aliexpress and would not hesitiate to buy a FWB there. I looked at a couple of DC arc welder schematics and they both had full wave bridge rectifiers rather than half wave. I don't know what is coming off it and its inputs/outputs.One thing - does the AC side work well? If that doesn't arc well - DC won't either.
Reply:If you want it to perform like an old tombstone, you might have better luck just buying another old tombstone.The harder you fall, the higher you bounce...250 amp Miller DialArc AC/DC StickF-225 amp Forney AC Stick230 amp Sears AC StickLincoln 180C MIGVictor Medalist 350 O/ACut 50 PlasmaLes
Reply:

Originally Posted by Nessmuk

They seem to have small stuff.
Reply:

Originally Posted by whtbaron

If you want it to perform like an old tombstone, you might have better luck just buying another old tombstone.
Reply:

Originally Posted by Nessmuk

I am trying to find new, heavy duty rated diodes for my welder. It is the typical ac/dc century type. I am just trying to bullet proof it a bit. I can't see spending a lot on what was a cheapish purchase.As a beside, I seem to have a difficult time of striking arcs on it compared to the Lincoln tombstone I once had.
Reply:They have a full way at Amazon. Dave

Originally Posted by Nessmuk

I am trying to find new, heavy duty rated diodes for my welder. It is the typical ac/dc century type. I am just trying to bullet proof it a bit. I can't see spending a lot on what was a cheapish purchase.As a beside, I seem to have a difficult time of striking arcs on it compared to the Lincoln tombstone I once had.
Reply:In the line of text you cut off in your posted picture is there a 6 digit model number.might start with 110. If so it was made by century which is now owned by Lincoln electric and supported by the wct division. To get an owner's and parts list with diagram. go to Lincolnelectric.comunder the resources tab select parts. enter as a guest. once in service navigator enter the ,model number in the code number box. If lucky you will get the owner's and parts manuals. While on lincoln you can send them an information request ifNavigator give you a hard time.

Bobcat 225G OCV?
Good afternoon, I recently got a Bobcat 225 G serial# KA818001. I put a new carb on and the got her fired up. No power at first until I found a bad connection at SR2. Now with her on max Im getting 107 out of the auxiliary and 96 volts out of the weld lugs. The AC aux is a little low but the weld output voltage seems high. Can anyone give me any insight on how to test the OCVs and what they should be? Any help much appreciated.

Harris Tips Changed????

  The old tip is probably near 20yrs old, so that may make a difference.  But.........it seems as if they've changed the design.  Smaller preheat holes.  Called the guy, and he said they will work fine, not to worry.............  Dunno..........This is a 6290-2 meant for up to 2" plate.  I just can't see how those tiny little holes will provide enough flame.  The old ones had larger holes.  Or maybe not(shrug), the old tip's been cleaned a time or two over the years(shrug).  It's pretty much past the time of cleaning anymore..........it lived a good life.They're not aftermarket.  I only buy genuine Harris tips.  (yeah.......buys a couple of tips in 20yrs

)  I also had them send me a 6290-1 for thinner stuff.
Reply:

Originally Posted by farmersammm

  The old tip is probably near 20yrs old, so that may make a difference.  But.........it seems as if they've changed the design.  Smaller preheat holes.  Called the guy, and he said they will work fine, not to worry.............  Dunno..........This is a 6290-2 meant for up to 2" plate.  I just can't see how those tiny little holes will provide enough flame.  The old ones had larger holes.  Or maybe not(shrug), the old tip's been cleaned a time or two over the years(shrug).  It's pretty much past the time of cleaning anymore..........it lived a good life.They're not aftermarket.  I only buy genuine Harris tips.  (yeah.......buys a couple of tips in 20yrs

)  I also had them send me a 6290-1 for thinner stuff.
Reply:

Originally Posted by M J D

Is it possible that the one with bigger holes is a higher preheat tip?  That would really be the only reason I could see with the same rated #2 tips.
Reply:

Originally Posted by M J D

Is it possible that the one with bigger holes is a higher preheat tip?  That would really be the only reason I could see with the same rated #2 tips.
Reply:

Originally Posted by farmersammm

Maybe I reamed the damn holes bigger over the years with the cleaning rod thingy's.
Reply:

Originally Posted by farmersammm

[Picture omitted] The old tip is probably near 20yrs old, ...This is a 6290-2 meant for up to 2" plate.  I just can't see how those tiny little holes will provide enough flame.  The old ones had larger holes.  Or maybe not(shrug), the old tip's been cleaned a time or two over the years(shrug).  It's pretty much past the time of cleaning anymore..........it lived a good life.
Reply:

Originally Posted by Oldiron2

I have Harris tips, including that one [6290-2], that are close to fifty years old. Want me to mike the holes in mine, just for comparison? Mine still looks like-new, less staining on the outside. FWIW, I still have a Glossy-colored hardbound Harris catalog from that era; need any of it scanned and posted here?

Reply:

Originally Posted by whtbaron

Hmmm.... maybe a little, but that tip is definitely different.... look at the shape around the center and the distance to the outside holes from the outer edge...
Reply:I never file a tip, just clean the holes with a tip cleaner.
Reply:Maybe that's how they are maintaining heat with the smaller holes? More focused into the center? Fuel saving concerns over the years?The harder you fall, the higher you bounce...250 amp Miller DialArc AC/DC StickF-225 amp Forney AC Stick230 amp Sears AC StickLincoln 180C MIGVictor Medalist 350 O/ACut 50 PlasmaLes
Reply:They're owned by ESAB now.....................  Probably messed up the original design.  They don't think so good across the pond

Reply:But I do like ESAB rods
Reply:Well... at some point you are just going to have to try it out. Who knows... maybe you'll like it better...The harder you fall, the higher you bounce...250 amp Miller DialArc AC/DC StickF-225 amp Forney AC Stick230 amp Sears AC StickLincoln 180C MIGVictor Medalist 350 O/ACut 50 PlasmaLes
Reply:Harris is owned by Lincoln. ESAB ended up with and destroyed Victor. I think you have just opened up the holes with cleaning over the years. No matter. The new tip will likely perform fine. If not, Take it back.. Harris tips are the least complicated tips on the market to produce so don't be afraid to try aftermarket tips for half the cost.Thermal Arc 320SP ( Lorch )Cobra PythonsThermal Arc 300 AC/DC  ( Sanrex )ESAB 301i AC/DC  ( Lorch )Thermal Arc 161STL  ( WTL )Thermal Arc 190S  ( Sanrex )Cut Master 82, 42. Cut45 ( WTL )Victor Gas Apps.Boxes and boxes of welding crap.
Reply:

Originally Posted by farmersammm

Cool

  Maybe I'm just a doddering old fool.  No need for the catalog,, just see what size cleaning tip fits the preheat holes.  Thanks!
Reply:For the price of the tip just try it and see what happens, you may be over thinking it. While nobody seems to like them, scientists and engineers are not dummies and there is usually a reason something is the way it is. Could be that they have just worked out how to make things better over 20 years. Could be to do with velocity of the gas flow through the holes. Could be a number of things involving quite a bit of mathematical equations.Gear: Esab power compact 205 with tbi industries torch       BOC Smootharc 185dc tig       Miller Syncrowave 350LX

Gas cylinders - Lease or buy?
Just reviewing our expenses for the last year, and one of the things I never really think about is gas cylinders.  They are always there, and always being used, but the cost seems to just disappear into the price of welding consumables, etc.  Several years ago, my supplier stopped selling bottles and started only leasing them, but the cost was pretty minute. Looking back at my invoices, over the last several years my lease (per bottle) has crept up from around $100/year to almost $300/year.  Supplier tells me it's "standard" and "volume based" and that you just "build it into your rate, and everyone is happy" (not really their choice to make), but either way it has me shopping around a bit and getting prices from some other suppliers.  On the flip side, I own several bottles, which I have always exchanged with no issues.  Looks like the cost of a new bottle is a little over a year's lease.  Starting to think about just buying some empty bottles and exchanging them.anyone else had similar experience?  Seems since all the LWS have been bought up by big companies, prices have soared.  I'm sure it's a drop in the bucket overall, and we have to keep bottles handy, just wondering if it's a reasonable place to trim some cost.
Reply:

Originally Posted by RMI

my lease (per bottle) has crept up from around $100/year to almost $300/year.
Reply:

Originally Posted by RMI

Just reviewing our expenses for the last year, and one of the things I never really think about is gas cylinders.  They are always there, and always being used, but the cost seems to just disappear into the price of welding consumables, etc.  Several years ago, my supplier stopped selling bottles and started only leasing them, but the cost was pretty minute. Looking back at my invoices, over the last several years my lease (per bottle) has crept up from around $100/year to almost $300/year.  Supplier tells me it's "standard" and "volume based" and that you just "build it into your rate, and everyone is happy" (not really their choice to make), but either way it has me shopping around a bit and getting prices from some other suppliers.  On the flip side, I own several bottles, which I have always exchanged with no issues.  Looks like the cost of a new bottle is a little over a year's lease.  Starting to think about just buying some empty bottles and exchanging them.anyone else had similar experience?  Seems since all the LWS have been bought up by big companies, prices have soared.  I'm sure it's a drop in the bucket overall, and we have to keep bottles handy, just wondering if it's a reasonable place to trim some cost.
Reply:I would check with your accountant and see what the tax write off is for those leased cylinders.Ed Conleyhttp://www.screamingbroccoli.com/MM252MM211 (Sold)Passport Plus & Spool gunLincoln SP135 Plus- (Gone to a good home)Klutch 120v Plasma cutterSO 2020 benderBeer in the fridge
Reply:As a hobby-use individual, I don't use lots of any gasses.......
Reply:I don't have a lot of options here for O2 and acetylene ... the basic contract for the 2 bottles started out around $100/yr (plus any refill costs) and is now well up over $250. It was Praxair but it didn't get any cheaper with the last ownership change. I haven't refilled lately, but I think that was over $100/bottle as well...The harder you fall, the higher you bounce...250 amp Miller DialArc AC/DC StickF-225 amp Forney AC Stick230 amp Sears AC StickLincoln 180C MIGVictor Medalist 350 O/ACut 50 PlasmaLes
Reply:

Originally Posted by whtbaron

I don't have a lot of options here for O2 and acetylene ... the basic contract for the 2 bottles started out around $100/yr (plus any refill costs) and is now well up over $250. It was Praxair but it didn't get any cheaper with the last ownership change. I haven't refilled lately, but I think that was over $100/bottle as well...
Reply:I own about 4 bottles and lease another 8 bottles. My owned bottles are on the portable migs, tigs, and purge rigs that I use the least, and transfil them from leased bottles that I frequently change on my fixed bench stations. And if I get short somehow on leased bottles I can rob my owned bottles. Keeps the lease rates reasonable. I usually buy the owned bottles cheap when available and my LWS does the upkeep.Weld like a "WELDOR", not a wel-"DERR"

MillerDynasty700DX,Dynasty350DX4ea,Dynasty200DX,Li  ncolnSW200-2ea.,MillerMatic350P,MillerMatic200w/spoolgun,MKCobraMig260,Lincoln SP-170T,PlasmaCam/Hypertherm1250,HFProTig2ea,MigMax1ea.
Reply:Up until the late 90's my local supplier was $4 a month rental no matter the size or contents and after 3 years you owned them for exchange. That is no longer the policy.

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Exciting Review | PDKJ Russia International Machine Tool Exhibition Successfully

Dry goods sharing of mixed gas selection during welding

Are vintage welding machines becoming like the manual transmission?

Montgomery Wards diodes?

Bobcat 225G OCV?

Harris Tips Changed????

Gas cylinders - Lease or buy?