My dad studied engineering in the late 1920's. Part of their learning involved learning the skills necessary to build the things they designed. He told me about learning to gas weld aluminum and how difficult it was because it gave little warning before it just melted away. He said he never got good at it but others did. People learned how to do a lot of things long before their was TIG and MIG welding (in fact arc welding became common in ship building for the massive buildup for WWII) or much in the way of automated machinery for that matter. How long will this repair work? I don't know but still this man did some very nice work!
При помешивании из алюминиевого расплава убираются окислы и пузырьки, при сварке обычным газом получается надёжно лучше, проще, дешевле чем с аргоном, работает всё потом не хуже нового. Эххх, молодёжь, учитесь малята, всему вас учить надо. 😀
I have welded a Honda FL350 atv piston. It's still running to this day and it's been years. I used a spool gun with 100% Argon. The thing I don't like about how he did this job was that he should have used a brass or copper back stop inside the hole. The other thing is that he is not using any shielding gas. He also appears to be using some kind of standard welding rod (PD110) at the beginning of the video but don't know what he was doing there (maybe picking off an oxide layer ?). Then he followed up plugging the hole with another rod. It seemed to work but I wonder how strong. I know for a fact my spool gun welding worked. He seems to be skilled.
I once used a flat piece of slate as a back stop to MIG a hole shut. It worked. The arc weld rod he was using seems to be more for manipulating the brazing puddle (for lack of a better word) to form it. I imagine that this type of fix could Maybe work ok.
Excelente gracias por su tiempo en la vida ay que aprender de todo puede ser que no haya repuesto o dinero para reparar nuestro unico beiculo lo felicito
Mon père dans les années 50 prenait un piston de moteur de Frégate et rajoutait de la matière sur la tête du piston. Les baguettes d'alu étaient taillées dans des bidons de lait. Une fois l'épaisseur atteinte il finissait le piston au tour pour l'évider à l'intérieur et donner la forme bombée extérieure à la calotte. Ce piston une fois fini était monté sur sa moto une NSU OSL 250 cc modifiée pour les courses de moto cross et pour tourner au méthanol. Donc ce principe fonctionnait très bien à l'époque.
После всего этого, вы диаметр на элепс мекрометром промерили? Я я уверен, что поршень повело этого, поршень надо вставить по размеру поршня во втулку, запаять, дать остыть, а затем вытащить поршень, чтобы его не повело.
That's the way you weld with a wire coat hanger on steel, but aluminum doesn't act that way. It has to be inserted in a helium atmosphere with a plasma type flame, much hotter than Acetelyn and Oxygen can muster. You have to evenly heat all of the part that you're welding and keep it that hot and use a special flux or it will blow up when combustion forces are applied to it. The old expression was HELIARC, which is a combination of Helium and ARC. You CAN use an Aluminum SPOOL GUN with a MIG power unit. The gun you hold has the spool mounted right on it and the welder is cabled with a Helium flow plume around the outside perimeter of the orifice where the wire comes out. Otherwise, to use an old expression, "you're pissing into the wind."
Agreed, 100%. I might even add a gas backing nozzle on the underside of the piston And, there should have been a lot more prep work done. Especially on the bottom side where the piston spent much of its previous life in oil. This might be an appropriate fix for a lawnmower but not something you would need to depend on.
So what your saying is you can’t weld aluminium with oxi acetylene? Well if that’s what your saying your wrong. You can. I’m not saying you should weld a piston but this method is fine for Aluminium welding.
@@kjbull1 *you're Oh, you CAN, doesn't mean you SHOULD. It certainly doesn't have the strength or bond of a shielded arc process. It's a third world fix.
He's using that "Wonder Rod" alloy so no gas needed and then using an arc rod for a stir stick to break the oxide layer and blend the puddle. Piston or not he's skilled with that alloy and it's a good demo on using the stuff.
Just out of curiosity...do you think it could be possible to weld a dome on a piston and it would last? (for example 11:1 compression) I don't ever plan on doing this but wondered about it.
Svařovat hliník a jeho slitiny nedokáže jen tak někdo. Tohle je dobrá práce. Viděl jsem práce jiných rádoby odborníků co používali TIG a byla to hrozná prasečina. Jó kdo umí, ten umí.
Un piston n'est pas en aluminium pour, c'est un alliage d'aluminium. Cela rend le soudage au chalumeau possible, mais fragile aux différences de température. Ceci dit, bravo pour le talent de soudeur.
por un calentamiento de motor 2 cilindro se me ronpio en la parte superior el corte es muy pequeño se puede soldar habria que pulirlo al cilindro despues de soldrlo ya que me podria rayar las pared del blok de cilindro gracias
Заварить или запаять поршень возможно, но использовать его в двигателе внутреннего сгорания таким нельзя. Может быть только в дешёвом, не ответственном воздушном компрессоре сгодится, который не жаль выкинуть целиком в случае отказа.
I'm assuming it wasn't balanced to match the rest? Don't you think it would've been a good idea to keep track of the rings orientation so they could be installed the same way? I guess ring end gap clearances aren't a concern of yours either?
He is using a stainless rod to get thru the oxicid. That is the fluxes job. Then he adds alum rod. Lots of aluninum was welded inthe 1940s with the torch. Before heliarc was invented.
You definitely have a skill there I don't think it would be easy to pick up. Many melted things in practice. Is that just Oxy Acetylene. Those rods are they just pure Aluminium rods or these new low temp ones you see a lot of now.
They take USED aluminum parts like motorcycle brake levers or gears or cases and melts them and stick flick clean them as they melt them along a steel v old bed rail or whatever. So the initial "rods" are used junk parts melted and "cleaned" with the same stick flick oxy acet process.They are not the low temp GARBAGE rods
Have a xt500 with a piston and exhaust valve welded up 40 years ago and still runs. Pistons and valves were expensive back when we were paying 19%interest on home loans
If done correctly, it will last forever. It is all about getting the temperature right, so when it cools down, there will be no stress point in the cylinder. This is no different to traditionally fixing Model T blocks.
@@diegosilang4823 I agree with you, but the things is you need to buy a very strong steel that would be hard to wear out when you weld on it. It would be much easier and quicker to get another piston from 2nd hands car or get a new one if the manufacturer still sell them.
@@remster1159 Like I said you can't weld it like that as it will turns to hole again. When it get burns it get very hot and it needs a very strong metal that it won't melt - you have got no idea what you are talking about.
Hey, ya put a dome of it on yer chainsaw piston then you round dome cut it "even thickness" on yer lathe, no need to cut the squish or drop the cylinder with a gasket removal, instant horsepower and compression. Thank you, thank you, takes a bow.
Нечего не разлетится . Газом алюминий сплавляется в одно целое монолит , пор там нет некаких в сравнение с аргоном . Заваривали подобный прогар ,потом ещё 40 тысяч движок бегал с таким поршнем ,дальнейшую судьбу не знаю продали авто
@@Den-po5py Я бы себе такой поршень ни за что бы не поставил. Новый купил бы, чем так колхозить. Если уж открыл мотор для ремонта, то ставить надо стандарт-заводской, а не "кулибинский шедевр". Это всё же мотор, а не какая-то деталь к кузову!
brazing if the filler metal is a dissimilar metal and lower melting point of the base metal, If both metals are of the same type: Aluminum in this case it is welding, Both metals are melted and fused together!
It appears to be scrap aluminum. The welding rod you see initially isn't for filler, he's using the butt end of a steel welding rod to manipulate, and clear impurities out of the weld puddle. The filler material is the fat rod. The welding rod is used to gauge how hot the aluminum is, and to push it into a fatter layer, that he'll then add filler to. Same thing when he flips the piston over, he's using the steel welding rod to shape the weld pool, not add to it.
@@vandalsgarage these guys usually melt down another piston to make the filler ,, means the alloy in the diy rod is close to a piston , as it was a piston , not the worst idea but without flux to de oxidize the job its iffy at best.
اى نوع من انواع الحام يقوم بعملية الترميم والاصلاح لهذه البستم مع مراعات عدم ترك اى ثقب لان وجه البستم فى البنزين او الديزل الضغط الواقع علىه بيكون صغير نسبيا
I've seen a few holed pistons from two strokes overheating before, but this is obviously from a 4 stroke engine. Clearly the operator has welding skills, but I'd love to see how, and for how long, that piston stands up to normal combustion chamber operation.... with both cylinder combustion pressures and heat being a concern. Cylinder temps of up to 2500C are pretty warm.... google tells me if an aluminium alloy piston gets over 550C it goes all melty.
if the cylinder really reached that temperature in a motorcycle engine, no manufacturer would put aluminum pistons. and answering your question, piston recovery may not deliver the same performance as before, but for common use bikes that will rarely exceed 7,000 RPM, I think this repair is very unlikely to cause any problems. . . . . . Really, where did you get the idea that the combustion chamber of an domestic market engine reaches 50% of the temperature of the sun?
@IvysSSousa Actually 1500 to 2000C, but I would also like to see how long such a repair lasts. As in another of these videos, this looks suspiciously like "Aluminum Brazing Rod", and not actually aluminum filler. Maybe make a video showing installation of the piston and engine actually running?
OLÁ. Sendo eu um profundo conhecedor de pistões de alumínio eu direi que "soldar pistões" é fazer o nº 2 sem vaso e sem papel Higiênico em um banheiro público. Roberto Udo Krapf
Das ist aber leichtsinnig ohne Schutz an der Flex. Warumm wird der Kolben nicht eingespannt und die Flex dann mit zwei Händen gehalten so ist das leichtsinnig . Mfg.
Ein paar Finger mehr oder weniger an der Hand scheint ihm egal zu sein, die kann er ja auch wieder anlöten wenn mal der Eine oder Andere abgetrennt wird. Das ist feinste Kolbenbearbeitung wie man sie eben nur selten sieht. Blos ob der Kolben nach diesem Massaker überhaupt noch rund ist ist, ist ein anderes Thema. Das Materialgefüge dürfte ebenfalls tot sein, aber egal, optisch ist er wieder hergestellt der gute Kolben. Das ist Arbeiten BRUTAL in jeder Beziehung, ohne Rücksicht auf Verluste. Da kann MAHLE mal was lernen von dem Kollegen.
Cómo se regula la flama? Es más oxígeno que acetileno?...... Por responder gracias Saludos desde México amigo la verdad he aprendido mucho con tus videos y todos los días los pongo en práctica... Gracias por compartir tus conocimientos dios te bendiga....
So don't you first clean the solder joint of breaks, cracks, then measure the piston to see if it is still round? After soldering, measure the piston and test it with crack detection, then machine and perform crack inspection and dimensional inspection after machining
Я не сварщик , но мне интересно , что это за манипуляции с металлическим стержнем электрода вперемен с куском , как я понял алюминия ( хотя очень похож на оловянный припой ) ?
Наплавляет он обыкновенным алюминиевым прутом, а концом сварочного электрода разравнивает расплавленный металл. Хотя для этого было бы гораздо лучше пользоваться чем-нибудь вроде узкого шпателя. Ровнее получилась бы поверхность.
if oxyacetylene weld cast aluminum then why you need TIG? cast Piston contain %5 to%10 silicon that is rock so weld does not stick to it till it turned to ash and that is with TIG , i have given 3 new pistons to a professional welder to weld inside underneath , so i can carve pockets on top for high lift cam , 2 ruined, after two melted into ring slots i put rings in before welding and wrapped with wet cloth.
Para mim ficou bom de se ver mas não funciona, quando o motor funcionar correrão o risco de micro fraturas e com a pressão do cilindro não aguentar muito tempo, isso foi porque colocou um vela comprida porque quis economizar a sorte foi não ter estragado a camisa, vai dar problema, mas ficou bonito.
Leichtmetall autogen schweißen? Handwerklich ist das im Film geschickt gemacht, sieht aber eher nach Löten aus. Mit Glück hält das so bis zum Ortsausgangsschild, mit ganz viel Glück.
All good and well. But pistons are not welded. You just buy a new one. The repaired will never be the same, and the weight balance will not be the same.
@@Davilasammo no...its not. Because the imbalance will still be present. Any motor is balanced with crank and piston. Crank can be balanced seperately, but the counterweights on the crank accounts for the weight of the piston. If any of those values dont match, it will cause engine vibration and mechanical wear
@@vanstaden You make a good point. However since aluminum is light and a small area filling in the missing aluminum the weight difference is going to be very minuscule. I doubt it would make any difference. I'm more concerned with the repair lasting long term.
That is brazing, not welding. It is done at a lower temperature than welding, and will fail at a lower temperature too. If the hole was due to overheating, the repair won't last long. Also, the piston will not be round after this or be balanced. Get another piston and be done.
pistoni sono di alluminio con lega particolare e stampato con presso fusione e comunque non si salda in questo modo bisogna prima fare una preparazione scaldarlo usare acidi specifici
My dad studied engineering in the late 1920's. Part of their learning involved learning the skills necessary to build the things they designed. He told me about learning to gas weld aluminum and how difficult it was because it gave little warning before it just melted away. He said he never got good at it but others did. People learned how to do a lot of things long before their was TIG and MIG welding (in fact arc welding became common in ship building for the massive buildup for WWII) or much in the way of automated machinery for that matter. How long will this repair work? I don't know but still this man did some very nice work!
Just buy new ones
При помешивании из алюминиевого расплава убираются окислы и пузырьки, при сварке обычным газом получается надёжно лучше, проще, дешевле чем с аргоном, работает всё потом не хуже нового. Эххх, молодёжь, учитесь малята, всему вас учить надо. 😀
Мы тоже так в девяностые реставрировали... Нормально ходит после ремонта, респект!
I have welded a Honda FL350 atv piston. It's still running to this day and it's been years.
I used a spool gun with 100% Argon.
The thing I don't like about how he did this job was that he should have used a brass or copper back stop inside the hole.
The other thing is that he is not using any shielding gas.
He also appears to be using some kind of standard welding rod (PD110) at the beginning of the video but don't know what he was doing there (maybe picking off an oxide layer ?). Then he followed up plugging the hole with another rod. It seemed to work but I wonder how strong. I know for a fact my spool gun welding worked.
He seems to be skilled.
I once used a flat piece of slate as a back stop to MIG a hole shut. It worked. The arc weld rod he was using seems to be more for manipulating the brazing puddle (for lack of a better word) to form it. I imagine that this type of fix could Maybe work ok.
He's using those alloy "Wonder Rods" the you can get at HF and flea markets. No gas needed.
no
My Grandfather torch welded a crack in an aluminum upright bass. He told me he used the correct aluminum rod and correct flux.
Сварка сваркой а как же вес и не появиться опять дырка?
Show.....que serviço lindo!!
Аргоном надо варить и проволокой АК-5, а с низу надо поддувать немного аргона. Тогда с внутренней стороны не будут поры.
Excelente gracias por su tiempo en la vida ay que aprender de todo puede ser que no haya repuesto o dinero para reparar nuestro unico beiculo lo felicito
Mon père dans les années 50 prenait un piston de moteur de Frégate et rajoutait de la matière sur la tête du piston. Les baguettes d'alu étaient taillées dans des bidons de lait. Une fois l'épaisseur atteinte il finissait le piston au tour pour l'évider à l'intérieur et donner la forme bombée extérieure à la calotte. Ce piston une fois fini était monté sur sa moto une NSU OSL 250 cc modifiée pour les courses de moto cross et pour tourner au méthanol. Donc ce principe fonctionnait très bien à l'époque.
Thank you - very interesting - with the stealelectrode to carry away the oxyd layer - thanks for your video
Частенько попадаются его ролики. Мужик рукастый, руки не лохматые, как говаривал мой дед.
После всего этого, вы диаметр на элепс мекрометром промерили? Я я уверен, что поршень повело этого, поршень надо вставить по размеру поршня во втулку, запаять, дать остыть, а затем вытащить поршень, чтобы его не повело.
Super. fait attention à votre sécurité avec disque sans protection 👍
Parabéns vc fioi , excelente!
Hola muy buen video la pregunta es que gas usas y para soldar usas electro de aluminio ??
아세틸렌
Ottimo lavoro. Sei disposto ad aggiustare un badi' (base motore) di una alfa romeo giulia? Se sì come ci possiamo accordare?
That's the way you weld with a wire coat hanger on steel, but aluminum doesn't act that way. It has to be inserted in a helium atmosphere with a plasma type flame, much hotter than Acetelyn and Oxygen can muster. You have to evenly heat all of the part that you're welding and keep it that hot and use a special flux or it will blow up when combustion forces are applied to it. The old expression was HELIARC, which is a combination of Helium and ARC. You CAN use an Aluminum SPOOL GUN with a MIG power unit. The gun you hold has the spool mounted right on it and the welder is cabled with a Helium flow plume around the outside perimeter of the orifice where the wire comes out. Otherwise, to use an old expression, "you're pissing into the wind."
Agreed, 100%. I might even add a gas backing nozzle on the underside of the piston And, there should have been a lot more prep work done. Especially on the bottom side where the piston spent much of its previous life in oil. This might be an appropriate fix for a lawnmower but not something you would need to depend on.
So what your saying is you can’t weld aluminium with oxi acetylene? Well if that’s what your saying your wrong. You can. I’m not saying you should weld a piston but this method is fine for Aluminium welding.
@@kjbull1 *you're Oh, you CAN, doesn't mean you SHOULD. It certainly doesn't have the strength or bond of a shielded arc process. It's a third world fix.
He's using that "Wonder Rod" alloy so no gas needed and then using an arc rod for a stir stick to break the oxide layer and blend the puddle. Piston or not he's skilled with that alloy and it's a good demo on using the stuff.
@@EddieTheGrouch
So you doubt that he's using selfmade rods from the same material that he's welding ?
Complimenti ottimo lavoro
I've repaired pistons with TIG method twice and was successful. I'm a qualified welder
Just out of curiosity...do you think it could be possible to weld a dome on a piston and it would last? (for example 11:1 compression) I don't ever plan on doing this but wondered about it.
Bonjour,
C'est quoi ces baguettes que vous utilisez ??
Salut super technique bravo Île de la Réunion
Svařovat hliník a jeho slitiny nedokáže jen tak někdo. Tohle je dobrá práce. Viděl jsem práce jiných rádoby odborníků co používali TIG a byla to hrozná prasečina. Jó kdo umí, ten umí.
Ukuran piston berubah, ngembang karna efek panas tinggi, dan piston butuh presisi tinggi, lbh aman dengan argon
Un piston n'est pas en aluminium pour, c'est un alliage d'aluminium.
Cela rend le soudage au chalumeau possible, mais fragile aux différences de température.
Ceci dit, bravo pour le talent de soudeur.
No se deforma el piston?
Мужик ты просто гений и настоящий мастер я бы такую поломку не смог сделать.
Great job just as good as a TIG.
no it aint
por un calentamiento de motor 2 cilindro se me ronpio en la parte superior el corte es muy pequeño se puede soldar habria que pulirlo al cilindro despues de soldrlo ya que me podria rayar las pared del blok de cilindro gracias
How long will tha repair work?
Welding aluminium was done more then 40 years ago and not this way.
Заварить или запаять поршень возможно, но использовать его в двигателе внутреннего сгорания таким нельзя. Может быть только в дешёвом, не ответственном воздушном компрессоре сгодится, который не жаль выкинуть целиком в случае отказа.
на продажу, наверное.
Ювелир! Купи на али болгарку со шпинделем М10, к ней у китайцев много мелкостей для таких работ
Способ может и хорош. При условии, что нет рядом аргона.
it doesn't show whether the wristpin will fit after this "welding". also how "out of round" is this piston now?
Who cares... 99.9% of viewers have no idea about it, but "good job," points scored, likes added, and money from Google on its way
Какую присадку использовали ?
I'm assuming it wasn't balanced to match the rest? Don't you think it would've been a good idea to keep track of the rings orientation so they could be installed the same way? I guess ring end gap clearances aren't a concern of yours either?
I think it's more about we know how to weld it but most of us know not to weld it, and to buy a new one.
He is using a stainless rod to get thru the oxicid. That is the fluxes job. Then he adds alum rod. Lots of aluninum was welded inthe 1940s with the torch. Before heliarc was invented.
Funny, the old sht is better than the new and lasts forever.
Parabéns você é muito bom parabéns ❤
Você usaria esse pistão?
You definitely have a skill there I don't think it would be easy to pick up. Many melted things in practice. Is that just Oxy Acetylene. Those rods are they just pure Aluminium rods or these new low temp ones you see a lot of now.
They take USED aluminum parts like motorcycle brake levers or gears or cases and melts them and stick flick clean them as they melt them along a steel v old bed rail or whatever. So the initial "rods" are used junk parts melted and "cleaned" with the same stick flick oxy acet process.They are not the low temp GARBAGE rods
Trop fort merci 👍🏼👍🏼👍🏼👍🏼👍🏼👍🏼
Pardon, aber normalerweise werfe ich solche Kolben weg und verwende einfach neue, oder?
natürlich, so man einen Neuen bekommt.
@@guenther-ce7ys und wenn ich alu schweiße , dann mit sicherheit nicht autogen sondern WIG
You can't weld it like that as it will turns to hole again. Throw it away and get a new piston that would save you the hassle :)
Have a xt500 with a piston and exhaust valve welded up 40 years ago and still runs. Pistons and valves were expensive back when we were paying 19%interest on home loans
If done correctly, it will last forever. It is all about getting the temperature right, so when it cools down, there will be no stress point in the cylinder. This is no different to traditionally fixing Model T blocks.
@@diegosilang4823 I agree with you, but the things is you need to buy a very strong steel that would be hard to wear out when you weld on it. It would be much easier and quicker to get another piston from 2nd hands car or get a new one if the manufacturer still sell them.
@chris01479 i agree, but there are certain rare vehicles with hard to find parts, no new, NOS, or salvage parts available.
@@remster1159 Like I said you can't weld it like that as it will turns to hole again. When it get burns it get very hot and it needs a very strong metal that it won't melt - you have got no idea what you are talking about.
Hey, ya put a dome of it on yer chainsaw piston then you round dome cut it "even thickness" on yer lathe, no need to cut the squish or drop the cylinder with a gasket removal, instant horsepower and compression.
Thank you, thank you, takes a bow.
No PPE was harmed in the production of this video.
Может при сварке надо было поршень держать вертикально. Легче было бы варить.
В вакууме надо варить такие вещи, и фрезеровать на станке. А так эта поделка с порами в металле разлетится в самый неподходящий момент
Нечего не разлетится . Газом алюминий сплавляется в одно целое монолит , пор там нет некаких в сравнение с аргоном .
Заваривали подобный прогар ,потом ещё 40 тысяч движок бегал с таким поршнем ,дальнейшую судьбу не знаю продали авто
Единственное его потом нужно подогнать по весу ,чтоб разбалансировки с остальными поршнями не было
@@Den-po5py Я бы себе такой поршень ни за что бы не поставил. Новый купил бы, чем так колхозить. Если уж открыл мотор для ремонта, то ставить надо стандарт-заводской, а не "кулибинский шедевр". Это всё же мотор, а не какая-то деталь к кузову!
O que vc coloca na ponta do eletrodo e que tipo de gas sai dessa tocha do bico do maçarico.
Isso é " solda para alumínio com maçarico glp" tem no mercado livre. Já usei e funciona mesmo.
Поршня подбирают, строго по весу.Лучше купить поршня,чем потом весь двигатель .😂
This is brazing, where only the adding metal is metal is melting, Will this fix support The pression when in service?
I don't know....
brazing if the filler metal is a dissimilar metal and lower melting point of the base metal, If both metals are of the same type: Aluminum in this case it is welding, Both metals are melted and fused together!
That will last 5 maybe 10 minutes before it melts down piston are made of special silica alloy
That's probably because 99.9% of people would never waste their time welding a piston.
Nice work
whats the deal with 2 different welding rods?
Pehhh chanelnya go internasional 👍👍💪💪
Might see you over the weekend I supose
From garbage bin to paper weight quality in no time flat 👍👍
what rod are you using?
It appears to be scrap aluminum. The welding rod you see initially isn't for filler, he's using the butt end of a steel welding rod to manipulate, and clear impurities out of the weld puddle. The filler material is the fat rod. The welding rod is used to gauge how hot the aluminum is, and to push it into a fatter layer, that he'll then add filler to. Same thing when he flips the piston over, he's using the steel welding rod to shape the weld pool, not add to it.
@@vandalsgarage these guys usually melt down another piston to make the filler ,, means the alloy in the diy rod is close to a piston , as it was a piston , not the worst idea but without flux to de oxidize the job its iffy at best.
اى نوع من انواع الحام يقوم بعملية الترميم والاصلاح لهذه البستم مع مراعات عدم ترك اى ثقب لان وجه البستم فى البنزين او الديزل الضغط الواقع علىه بيكون صغير نسبيا
I've seen a few holed pistons from two strokes overheating before, but this is obviously from a 4 stroke engine. Clearly the operator has welding skills, but I'd love to see how, and for how long, that piston stands up to normal combustion chamber operation.... with both cylinder combustion pressures and heat being a concern.
Cylinder temps of up to 2500C are pretty warm.... google tells me if an aluminium alloy piston gets over 550C it goes all melty.
if the cylinder really reached that temperature in a motorcycle engine, no manufacturer would put aluminum pistons.
and answering your question, piston recovery may not deliver the same performance as before, but for common use bikes that will rarely exceed 7,000 RPM, I think this repair is very unlikely to cause any problems.
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Really, where did you get the idea that the combustion chamber of an domestic market engine reaches 50% of the temperature of the sun?
@IvysSSousa Actually 1500 to 2000C, but I would also like to see how long such a repair lasts. As in another of these videos, this looks suspiciously like "Aluminum Brazing Rod", and not actually aluminum filler.
Maybe make a video showing installation of the piston and engine actually running?
Алюминий плавится при температуре свыше 670градусов по цельсию
Get an egt, exhaust gas temperature gauge . Safest way to tune an engine , they're used on aircraft for a reason....
I thought the topic was repairing a holed piston.....but things like cylinder head temp gauges are useful to stop that.
@@howunacceptibleofme2145
Уровень образования сварщиков современных очень низкий!
Nice paperweight.
You juse dangerous machines men
eBay special ported and polished aluminum piston 2.99 shipping 599.99 last one over 3000 sold 😂
OLÁ. Sendo eu um profundo conhecedor de pistões de alumínio eu direi que "soldar pistões" é fazer o nº 2 sem vaso e sem papel Higiênico em um banheiro público. Roberto Udo Krapf
Exelente
А че, с дыркой на металлоприемке не принимают?
Isso e para países pobres e não a dinheiro tem que recuperar as peças
Hola es. Barilla de. Mig. Y plomo?
Plomo 😮
Das ist aber leichtsinnig ohne Schutz an der Flex. Warumm wird der Kolben nicht eingespannt und die Flex dann mit zwei Händen gehalten so ist das leichtsinnig . Mfg.
this gentleman is a good example for good technique and craftsmanship with zero accordance to the guidelines, I still watch his videos once in a while
Ein paar Finger mehr oder weniger an der Hand scheint ihm egal zu sein, die kann er ja auch wieder anlöten wenn mal der Eine oder Andere abgetrennt wird. Das ist feinste Kolbenbearbeitung wie man sie eben nur selten sieht. Blos ob der Kolben nach diesem Massaker überhaupt noch rund ist ist, ist ein anderes Thema. Das Materialgefüge dürfte ebenfalls tot sein, aber egal, optisch ist er wieder hergestellt der gute Kolben. Das ist Arbeiten BRUTAL in jeder Beziehung, ohne Rücksicht auf Verluste. Da kann MAHLE mal was lernen von dem Kollegen.
Cómo se regula la flama? Es más oxígeno que acetileno?...... Por responder gracias
Saludos desde México amigo la verdad he aprendido mucho con tus videos y todos los días los pongo en práctica... Gracias por compartir tus conocimientos dios te bendiga....
REALLY. Ya mean, there are people somewhere who don't weld aluminum on a regular basis? Where are you from?
Todo iba bien hasta que puso el disco asesino ese Lo menos indicado. Por lo demás impecable la técnica.
You never weld a piston, you replace it.
Habe ich Neulich bei einem Klimakondensator gemacht. John Deere Schlepper. Hat Funktioniert.
So don't you first clean the solder joint of breaks, cracks, then measure the piston to see if it is still round? After soldering, measure the piston and test it with crack detection, then machine and perform crack inspection and dimensional inspection after machining
7:30The most dangerous part, even for professionals with several years of experience.
that's for sure
thats certifiable .
The guy is a nut. He'll cut off a finger one day.
I bet he had no safety goggles either.
His repair might only last 100 miles.
using low temp aluminium rod .this will hold 2 strokes
Only good for a piston cup replica trophies but that's all I have some gold paint if you want
Я не сварщик , но мне интересно , что это за манипуляции с металлическим стержнем электрода вперемен с куском , как я понял алюминия ( хотя очень похож на оловянный припой ) ?
Наплавляет он обыкновенным алюминиевым прутом, а концом сварочного электрода разравнивает расплавленный металл. Хотя для этого было бы гораздо лучше пользоваться чем-нибудь вроде узкого шпателя. Ровнее получилась бы поверхность.
I bet that grinder can remove a finger or two before you realize it did... :O
Me párese peligroso sujetar con la mano el pistón al utilizar el disco dentado
if oxyacetylene weld cast aluminum then why you need TIG? cast Piston contain %5 to%10 silicon that is rock so weld does not stick to it till it turned to ash and that is with TIG , i have given 3 new pistons to a professional welder to weld inside underneath , so i can carve pockets on top for high lift cam , 2 ruined, after two melted into ring slots i put rings in before welding and wrapped with wet cloth.
And check the weight of the piston so as not to disturb the balance of the engine - nothing?
Para mim ficou bom de se ver mas não funciona, quando o motor funcionar correrão o risco de micro fraturas e com a pressão do cilindro não aguentar muito tempo, isso foi porque colocou um vela comprida porque quis economizar a sorte foi não ter estragado a camisa, vai dar problema, mas ficou bonito.
لاخير في هذه العملية اطلاقا
Upami piston retak tiasa teu di las
The hole is patched but the poston shuld not be used .
Очень спорное решение...
Meines Wissens nach nur ein Reibelot was hier aber aufwendig gezeigt wird...
Leichtmetall autogen schweißen? Handwerklich ist das im Film geschickt gemacht, sieht aber eher nach Löten aus. Mit Glück hält das so bis zum Ortsausgangsschild, mit ganz viel Glück.
Why not a new piston!!
All good and well. But pistons are not welded. You just buy a new one. The repaired will never be the same, and the weight balance will not be the same.
But if this piston from one cylinder engine, it's ok😊
@@Davilasammo no...its not. Because the imbalance will still be present. Any motor is balanced with crank and piston. Crank can be balanced seperately, but the counterweights on the crank accounts for the weight of the piston. If any of those values dont match, it will cause engine vibration and mechanical wear
@@vanstaden You make a good point. However since aluminum is light and a small area filling in the missing aluminum the weight difference is going to be very minuscule. I doubt it would make any difference. I'm more concerned with the repair lasting long term.
之前我的活塞也是破洞但是我也是用這個辦法是可以用..
That is brazing, not welding. It is done at a lower temperature than welding, and will fail at a lower temperature too. If the hole was due to overheating, the repair won't last long. Also, the piston will not be round after this or be balanced. Get another piston and be done.
You definitely don't weld a piston because of the distortion - unless you want a souvenir -
this kind a repair method doesnt acceft about material tension and density, im sure its lasting pretty long :D
Crude beyond imagine......
a piston head is $12, at the junkyard ffs.
А вес то изменился со стороны пайки.
Отлично пойдет на металлоприемку.
pistoni sono di alluminio con lega particolare e stampato con presso fusione e comunque non si salda in questo modo bisogna prima fare una preparazione scaldarlo usare acidi specifici
こんなもの修理補修して使うもんじゃない。もったいない運動も度が過ぎる。