Hona joale welding, voltage le lebelo la welding ke likarolo tse ka sehloohong tsa matla tse khethollang boholo ba weld.
1. Hona joale welding
Ha tjheseletsa ea hona joale e eketseha (maemo a mang a lula a sa fetohe), botebo ba ho kenella le bophahamo bo setseng ba keketseho ea weld, 'me bophara ba ho qhibiliha ha bo fetohe haholo (kapa bo eketseha hanyenyane).Sena ke hobane:
(1) Ka mor'a ho eketseha ha hona joale, matla a arc le ho kenya mocheso holim'a mosebetsi oa mosebetsi o eketseha, boemo ba mohloli oa mocheso bo theoha, 'me botebo ba ho kenella bo eketseha.Botebo ba ho kenella bo batla bo lekana le hona joale oa welding.
(2) Ka mor'a ho eketseha ha hona joale, tekanyo ea ho qhibiliha ea terata ea ho tjheseletsa e eketseha hoo e batlang e lekana, 'me bophahamo bo setseng bo eketseha hobane bophara ba ho qhibiliha bo batla bo sa fetohe.
(3) Ka mor'a ho eketseha ha hona joale, bophara ba mohala oa arc boa eketseha, empa botebo ba arc submersible ka har'a workpiece bo eketseha, 'me sebaka sa ho sisinyeha ha sebaka sa arc se fokotsehile, kahoo bophara ba ho qhibiliha bo batla bo sa fetohe.
2. Arc voltage
Ka mor'a hore motlakase oa arc o eketsehe, matla a arc a eketseha, mocheso oa mocheso oa workpiece oa eketseha, 'me bolelele ba arc boa lelefala le radius ea kabo ea eketseha, kahoo botebo ba ho kenella bo fokotseha hanyenyane' me bophara ba ho qhibiliha bo eketseha.Bophahamo bo setseng bo fokotseha, hobane bophara ba ho qhibiliha bo eketseha, empa palo e qhibilihang ea terata ea welding e fokotseha hanyenyane.
3. Lebelo la welding
Ha lebelo la welding le eketseha, matla a fokotseha, 'me botebo ba ho kenella le bophara ba ho kenella bo fokotseha.Bophahamo bo setseng bo boetse bo fokotsehile, hobane palo ea deposition ea tšepe ea terata ka tjheseletsa ka bolelele ba yuniti e fapana ka tsela e fapaneng le lebelo la tjheseletsa, 'me bophara ba ho qhibiliha bo lumellana ka tsela e fapaneng le lisekoere tsa lebelo la tjheseletsa.
moo U e emelang motlakase oa ho cheselletsa, 'na ke motlakase oa ho cheselletsa, oa hona joale o ama botebo ba ho kenella, motlakase o ama bophara ba ho qhibiliha, oa hona joale o molemo ho chesa ntle le ho chesa, motlakase o molemo ho spatter e fokolang, tse peli li lokisa e le' ngoe. ea bona, fetola paramethara e 'ngoe ka tjheseletsa boholo ba hona joale na le tšusumetso e khōlō ka boleng tjheseletsa le tlhahiso tjheseletsa.
The tjheseletsa hona joale haholo ama boholo ba ho kenella ka hare.Hona joale e nyane haholo, arc ha e tsitsa, botebo ba ho kenella bo nyane, ho bonolo ho baka mefokolo e kang ho kenella ho sa tsitsang le ho kenngoa ha slag, 'me tlhahiso e tlaase;Haeba hona joale e le kholo haholo, weld e atisa ho ba le mefokolo e kang undercut le ho chesa, 'me ka nako e ts'oanang e baka spatter.
Ka hona, hona joale oa welding o tlameha ho khethoa ka nepo, 'me ka kakaretso o ka khethoa ho latela foromo ea matla ho latela bophara ba eleketrode, ebe o lokisoa ka nepo ho latela boemo ba weld, sebopeho se kopaneng, boemo ba welding, botenya ba weldment, joalo-joalo.
Arc voltage e khethoa ke bolelele ba arc, arc e telele, 'me arc voltage e phahame;Haeba arc e le khutšoanyane, motlakase oa arc o tlaase.Boholo ba motlakase oa arc bo ama haholo bophara ba ho qhibiliha ha weld.
Arc ha ea lokela ho ba nako e telele haholo nakong ea ts'ebetso ea welding, ho seng joalo, mollo oa arc ha o tsitsa, o eketsa spatter ea tšepe, hape o tla baka porosity ka weld ka lebaka la tlhaselo ea moea.Ka hona, ha u cheselletsa, leka ho sebelisa li-arcs tse khutšoanyane, 'me ka kakaretso li hloka hore bolelele ba arc bo se ke ba feta bophara ba electrode.
Boholo ba lebelo la tjheseletsa bo amana ka ho toba le tlhahiso ea ho tjheseletsa.E le ho fumana lebelo le phahameng la ho tjheseletsa, bophara bo boholo ba electrode le ho tjheseletsa hona joale ho lokela ho sebelisoa tlas'a motheo oa ho netefatsa boleng, 'me lebelo la ho tjheseletsa le lokela ho lokisoa ka mokhoa o nepahetseng ho ea ka boemo bo itseng ho etsa bonnete ba hore bolelele le bophara ba weld li lokela ho etsoa. tsitsang ka hohle kamoo ho ka khonehang.
1. Short potoloho phetoho tjheseletsa
Phetoho ea potoloho e khuts'oane ho CO2 arc welding ke eona e sebelisoang haholo ho fetisisa, e sebelisoang haholo bakeng sa poleiti e tšesaane le tjheseletsa ea boemo bo felletseng, 'me lintlha tse boletsoeng ke arc voltage welding hajoale, lebelo la welding, welding circuit inductance, phallo ea khase le bolelele ba terata ea welding. .
(1) Arc gagamalo le tjheseletsa hona joale, bakeng sa tjheseletsa terata e itseng bophara bophara le tjheseletsa hona joale (ke hore, terata phepelo lebelo), e lokela ho tsamaisana le loketseng arc gagamalo e le ho fumana e tsitsitseng e khutsoanyane oa potoloho phetoho tshebetso, ka nako ena spatter ke. bonyane.
(2) Welding potoloho inductance, mosebetsi o ka sehloohong oa inductance:
a.Fetola sekhahla sa khōlo ea nako e khutšoanyane ea di/dt, di/dt e nyane haholo ho etsa hore likaroloana tse kholo li phatlohe ho fihlela karolo e kholo ea terata ea welding e phatloha le arc e tima, mme di/dt e kholo haholo hore e ka hlahisa palo e kgolo ya makumane a manyane a tshepe.
b.Fetola nako ea ho chesa arc le ho laola ho kenella ha tšepe ea motheo.
c .Lebelo la welding.Lebelo le potlakileng haholo la ho tjheseletsa le tla etsa hore mahlakore ka bobeli a tjheselle a tjhesehele, mme haeba lebelo la tjheseletsa le le butle haholo, mefokolo e kang ho tjheseha le sebopeho sa weld e mahoashe se tla etsahala habonolo.
d .Ho phalla ha khase ho itšetlehile ka lintlha tse kang botenya ba poleiti ea mofuta o kopanetsoeng, litlhaloso tsa welding le maemo a sebetsang.Ka kakaretso, sekhahla sa phallo ea khase ke 5-15 L/min ha ho tjheseletsa terata e ntle, le 20-25 L/min ha ho tjheseletsa terata e teteaneng.
e.Katoloso ea mohala.Bolelele bo loketseng ba katoloso ea terata e lokela ho ba makhetlo a 10-20 bophara ba terata ea welding.Nakong ea ts'ebetso ea ho tjheseletsa, leka ho e boloka ka har'a 10-20mm, bolelele ba ho atolosa bo eketseha, hona joale ho fokotseha ho fokotseha, ho kenella ha tšepe ea motheo ho fokotseha, 'me ka tsela e fapaneng, ho eketseha ha hona joale le ho kenella hoa eketseha.Ha ho na le resistivity e kholo ea terata ea welding, phello ena e totobetse haholoanyane.
f.Polarity ea phepelo ea matla.CO2 arc welding ka kakaretso e amohela DC reverse polarity, spatter e nyane, ho kenella ha tšepe ea arc e tsitsitseng ho hoholo, ho bōptjoa hantle, 'me litaba tsa hydrogen tsa tšepe ea weld li tlase.
2. Phetoho ea likaroloana tse ntle.
(1) Ka khase ea CO2, bakeng sa bophara bo itseng ba terata ea ho tjheseletsa, ha hona joale e eketseha ho boleng bo itseng 'me e tsamaea le khatello e phahameng ea arc, tšepe e qhibilihisitsoeng ea terata ea welding e tla fofa ka bolokolohi ka har'a letamo le qhibilihisitsoeng le nang le likaroloana tse nyenyane, 'me mokhoa ona oa phetoho ke phetoho e ntle ea likaroloana.
Nakong ea phetoho ea likaroloana tse ntle, ho kenella ha arc ho matla, 'me tšepe ea motheo e na le botebo bo boholo ba ho kenella, e leng se loketseng bakeng sa mohaho oa li-welding tse bohareng le tse teteaneng.Mokhoa o ka morao oa DC o boetse o sebelisoa bakeng sa tjheseletsa ea phetoho ea lijo-thollo tse ntle.
(2) Ha motlakase o ntse o eketseha, motlakase oa arc o tlameha ho eketseha, ho seng joalo arc e na le phello ea ho hlatsoa holim'a tšepe e qhibilihisitsoeng ea letamo, 'me sebopeho sa weld se senyeha,' me keketseho e nepahetseng ea motlakase oa arc e ka qoba ketsahalo ena.Leha ho le joalo, haeba motlakase oa arc o phahame haholo, ho phatloha ho tla eketseha haholo, 'me tlas'a motlakase o tšoanang, motlakase oa arc o fokotseha ha bophara ba terata ea welding bo ntse bo eketseha.
Ho na le phapang e kholo lipakeng tsa phetoho e ntle ea CO2 le phetoho ea jete ho TIG welding.Phetoho ea jete ho TIG welding ke axial, athe phetoho e ntle ea likaroloana ho CO2 ha e na axial mme ho ntse ho na le spatter ea tšepe.Ntle le moo, moeli oa jet transition oa hajoale ho argon arc welding o na le litšobotsi tse fapaneng tse hlakileng.(haholo-holo welded stainless steel and ferrous metals), ha e le hantle-grained transitions ha ho joalo.
3. Mehato ea ho fokotsa ho phatloha ha tšepe
(1) Khetho e nepahetseng ea liparamente tsa ts'ebetso, li-welding arc voltage: Bakeng sa bophara bo bong le bo bong ba terata ea welding ka har'a arc, ho na le melao e itseng lipakeng tsa sekhahla sa spatter le mochini oa welding.Sebakeng se senyenyane sa hona joale, potoloho e khutšoanyane
transition splash e nyane, mme sekhahla sa ho phatloha sebakeng se seholo sa hajoale (sebaka se setle sa phetoho ea likaroloana) le sona se nyane.
(2) Lebone la ho cheselletsa toche: toche ea tjheseletsa e na le palo e nyane haholo ea spatter ha e otlolohile, 'me ha e le kholoanyane angle ea ho tjheseletsa, ho na le sephaseli se seholo.Ho molemo ho sekamisa sethunya sa welding pele kapa ka morao eseng ho feta likhato tse 20.
(3) Bolelele ba katoloso ea terata ea welding: Bolelele ba ho atolosoa ha terata ea welding bo na le tšusumetso e kholo ho spatter, bolelele ba katoloso ea terata ea welding bo eketseha ho tloha ho 20 ho isa ho 30mm, mme palo ea spatter e eketseha ka hoo e ka bang 5%. bolelele bo lokela ho khutsufatsoa ka hohle kamoo ho ka khonehang.
4. Mefuta e fapaneng ea likhase tse sireletsang li na le mekhoa e fapaneng ea ho tjheseletsa.
(1) Mokhoa oa tjheseletsa o sebelisang CO2 khase e le khase e sireletsang ke CO2 arc welding.Preheater e lokela ho kenngoa ka har'a phepelo ea moea.Hobane mokelikeli oa CO2 o monya matla a mangata a mocheso nakong ea khase e tsoelang pele, ho atolosoa ha molumo oa khase ka mor'a ho tepella maikutlo ka mochine o fokotsang khatello ho tla fokotsa mocheso oa khase, e le ho thibela mongobo o ka har'a khase ea CO2 hore o se ke oa bata ka har'a cylinder outlet. valve e fokotsang khatello le ho thibela tsela ea khase, kahoo khase ea CO2 e futhumatsoa ke preheater pakeng tsa cylinder outlet le phokotso ea khatello.
(2) Mokhoa oa ho tjheseletsa oa CO2 + Ar gas e le mokhoa oa ho sireletsa khase ea MAG o bitsoa tšireletso ea khase ea 'mele.Mokhoa ona oa tjheseletsa o loketse bakeng sa tjheseletsa ya tshepe e sa hlwekang.
(3) Ar e le mokhoa oa ho tjheseletsa oa MIG bakeng sa welding e sirelelitsoeng ka khase, mokhoa ona oa ho tjheseletsa o loketse bakeng sa aluminium le aluminium alloy welding.
Nako ea poso: May-23-2023