Kedu ihe dị iche n'etiti TIG (DC) na TIG (AC)?

Ngwa ịgbado ọkụ TIG (DC) dị ugbu a bụ mgbe nke ugbu a na-aga n'otu ụzọ naanị.E jiri ya tụnyere AC (Alternating Current) TIG ịgbado ọkụ ugbu a otu oge na-eru agaghị aga efu ruo mgbe ịgbado ọkụ kwụsịrị.N'ozuzu TIG inverters ga-enwe ike ịgbado ọkụ ma ọ bụ DC ma ọ bụ AC / DC ịgbado ọkụ na nnọọ ole na ole igwe ịbụ AC naanị.

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A na-eji DC maka ịgbado ọkụ TIG Mild Steel / igwe anaghị agba nchara yana AC ga-eji maka ịgbado ọkụ Aluminom.

Polarity

Usoro ịgbado ọkụ TIG nwere nhọrọ atọ nke ịgbado ọkụ ugbu a dabere n'ụdị njikọ.Usoro njikọ ọ bụla nwere ma uru na ọghọm.

Direct ugbu a - Electrode Negative (DCEN)

Enwere ike iji usoro ịgbado ọkụ a maka ọtụtụ ihe.Ejikọtara ọwa ịgbado ọkụ TIG na mmepụta adịghị mma nke inverter ịgbado ọkụ na eriri nloghachi ọrụ na mmepụta dị mma.

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Mgbe arc na-eguzobe ugbu a na-asọba na sekit na okpomọkụ nkesa na arc dị gburugburu 33% n'akụkụ ọjọọ nke arc (ọkụ ịgbado ọkụ) na 67% n'akụkụ dị mma nke arc (ọrụ mpempe akwụkwọ).

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Ntụle a na-enye ntinye miri emi nke arc n'ime mpempe ọrụ ma belata okpomọkụ na electrode.

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Okpomọkụ a na-ebelata na electrode na-enye ohere ka ndị obere electrodes na-ebu ugbu a ma e jiri ya tụnyere njikọ polarity ndị ọzọ.A na-akpọkarị usoro njikọ a dị ka polarity kwụ ọtọ ma bụrụ njikọ a na-ejikarị na ịgbado ọkụ DC.

Direct Ugbu A - Electrode Positive (DCEP)

Mgbe ịgbado ọkụ na nke a mode na TIG ịgbado ọkụ ọkụ na-ejikọta na nti mmepụta nke ịgbado ọkụ inverter na ọrụ nloghachi USB na-adịghị mma mmepụta.

Mgbe arc na-eguzobe ugbu a na-asọba na sekit na okpomọkụ nkesa na arc dị gburugburu 33% n'akụkụ ọjọọ nke arc (ọrụ mpempe akwụkwọ) na 67% n'akụkụ dị mma nke arc (ọkụ ịgbado ọkụ).

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Nke a pụtara na a na-edobe electrode na ọkwa okpomọkụ kachasị elu ya mere ọ ga-abụrịrị ibu karịa ọnọdụ DCEN ọbụlagodi na nke ugbu a dị ntakịrị iji gbochie ikpo ọkụ ma ọ bụ agbaze electrode.A na-edobe mpempe ọrụ ahụ na ọkwa okpomọkụ dị ala ka ntinye weld ga-adị omimi.

 

A na-akpọkarị usoro njikọ a dị ka polarity ntụgharị.

Ọzọkwa, na nke a mode mmetụta nke ndọta ike nwere ike iduga na akwusighị ike na ihe a maara dị ka arc igbu ebe arc nwere ike na-awagharị n'etiti ihe a ga-welded.Nke a nwekwara ike ime na ọnọdụ DCEN mana ọ na-akarị na ọnọdụ DCEP.

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Ọ nwere ike na-ajụ ihe ojiji bụ nke a mode mgbe ịgbado ọkụ.Ihe kpatara ya bụ na ụfọdụ ihe na-adịghị ferrous dị ka aluminum na nkịtị ikpughe na ikuku na-etolite oxide n'elu. Nke a oxide na-kere n'ihi mmeghachi omume nke oxygen na ikuku na ihe yiri nchara na ígwè.Otú ọ dị, oxide a siri nnọọ ike ma nwee ebe mgbaze dị elu karịa ihe bụ isi na ya mere a ga-ewepụrịrị tupu e nwee ike ịgbado ọkụ.

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Enwere ike wepu oxide site n'igweri, ịhịa aka ma ọ bụ ihicha kemịkal mana ozugbo usoro nhicha ahụ kwụsịrị, oxide ga-amalite ịmalite ọzọ.Ya mere, ọ dị mma ga-ehicha ya n'oge ịgbado ọkụ.Mmetụta a na-eme mgbe ihe dị ugbu a na-asọba na ọnọdụ DCEP mgbe ikuku electron ga-agbaji ma wepụ oxide.Ya mere enwere ike iche na DCEP ga-abụ ọnọdụ kachasị mma maka ịgbado ihe ndị a na ụdị mkpuchi oxide a.N'ụzọ dị mwute n'ihi mkpughe nke electrode na okpomọkụ dị elu na ọnọdụ a, nha electrodes ga-abụrịrị nnukwu na ntinye arc ga-adị ala.

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Ihe ngwọta maka ụdị ihe ndị a ga-abụ arc na-abanye miri emi nke ọnọdụ DCEN gbakwunyere ihicha nke ọnọdụ DCEP.Iji nweta uru ndị a AC ịgbado ọkụ mode na-eji.

Welding dị ugbu a (AC).

Mgbe ịgbado ọkụ na AC mode ugbu a na-eweta site ịgbado ọkụ inverter na-arụ ọrụ na ma nti na-adịghị mma ọcha ma ọ bụ ọkara okirikiri.Nke a pụtara ugbu a na-aga n'otu ụzọ na nke ọzọ n'oge dị iche iche ka ejiri okwu alternating current mee ihe.Nchikota nke otu ihe dị mma na otu ihe na-adịghị mma ka a na-akpọ otu okirikiri.

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A na-akpọ ọnụọgụ ugboro okirikiri okirikiri n'ime otu sekọnd ka ugboro.Na UK ugboro nke ọzọ nke ugbu a na-eweta site na netwọk mains bụ 50 cycles kwa sekọnd ma na-egosipụta dị ka 50 Hertz (Hz)

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Nke a ga-apụta na nke ugbu a na-agbanwe ugboro 100 kwa nkeji.Ọnụ ọgụgụ nke cycles kwa sekọnd (ugboro) na igwe ọkọlọtọ na-ekpebi ugboro ugboro nke na UK bụ 50Hz.

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Ọ dị mma ịmara na ka ugboro ole na-abawanye mmetụta magnetik na-abawanye na ihe ndị dị ka ihe ntụgharị na-aghọwanye nke ọma.Na-abawanye ugboro nke ịgbado ọkụ ugbu a na-eme ka arc ahụ sie ike, na-eme ka nkwụsi ike arc dịkwuo mma ma na-eduga n'ọnọdụ ịgbado ọkụ na-achịkwa.
Agbanyeghị, nke a bụ usoro iwu dịka mgbe ịgbado ọkụ na ọnọdụ TIG enwere mmetụta ndị ọzọ na arc.

Enwere ike imetụta ikuku sine AC site na mkpuchi oxide nke ụfọdụ ihe na-eme dị ka ihe nrụzi na-egbochi eruba elektrọn.A maara nke a dị ka mgbazigharị arc na mmetụta ya na-eme ka a gbuchapụ ma ọ bụ gbagọọ ọkara okirikiri dị mma.Mmetụta maka mpaghara weld bụ ọnọdụ arc na-adịghị mma, enweghị ọrụ nhicha na mmebi tungsten nwere ike ime.

Arc rectification nke mma ọkara okirikiri

Ụdị Waveform dị ugbu a (AC).

The Sine Wave

Ebili nke sinusoidal nwere ihe dị mma na-ewulite ruo n'ogo ya site na efu tupu ọ daa azụ na efu (a na-akpọkarị ugwu).

Ka ọ na-agafe efu na nke ugbu a na-agbanwe ntụzịaka gaa na uru kachasị njọ tupu ya ebili na efu (nke a na-akpọkarị ndagwurugwu) otu okirikiri agwụla.

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Ọtụtụ n'ime ihe ochie TIG welder bụ naanị igwe ụdị ebili mmiri.Site na mmepe nke inverters ọgbara ọhụrụ nwere ngwa eletrọnịkị na-abawanye ọkaibe bịara mmepe na njikwa na nhazi nke AC waveform ejiri maka ịgbado ọkụ.

The Square Wave

Na mmepe nke AC / DC TIG ịgbado ọkụ inverters na-agụnye ọzọ electronics e mepụtara ọgbọ nke square ife igwe.N'ihi na ndị a electronic njikwa cross n'elu si nti na-adịghị mma na Anglịkan nwere ike mere fọrọ nke nta na otu ntabi nke na-eduga ndị ọzọ irè ugbu a na onye ọ bụla ọkara okirikiri n'ihi na a ogologo oge na kacha.

 

Ojiji nke ike ndọta echekwara nke ọma na-emepụta ụdị ebili mmiri dị nso na square.Njikwa nke isi iyi ọkụ eletrọnịkị mbụ nyere ohere ijikwa 'square wave'.Usoro ahụ ga-ekwe ka ịchịkwa ihe dị mma (nhicha) na nke na-adịghị mma (ntinye) ọkara okirikiri.

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The itule ọnọdụ ga-ha nhata + nti na adịghị mma ọkara okirikiri na-enye a kwụsiri ike weld ọnọdụ.

Nsogbu ndị nwere ike izute bụ na ozugbo ihicha mere n'ime ihe na-erughị oge ọkara okirikiri nke ọma mgbe ahụ ụfọdụ n'ime usoro ọkara dị mma adịghị arụpụta ma nwee ike ịbawanye mmebi nke electrode n'ihi oke ọkụ.Otú ọ dị, ụdị igwe a ga-enwekwa njikwa nguzozi nke kwere ka oge nke ọkara okirikiri dị mma gbanwee n'ime oge okirikiri.

 

Ntinye kacha

Enwere ike nweta nke a site n'itinye njikwa ahụ n'ọnọdụ nke ga-eme ka oge ka ukwuu na-etinye oge na ọkara nke na-adịghị mma n'ihe gbasara ọkara nke ọma.Nke a ga-ekwe ka elu ugbu a na-eji na obere electrodes ka ndị ọzọ

nke okpomọkụ dị na nti (ọrụ).Mmụba nke okpomọkụ na-ebutekwa ntinye miri emi mgbe ị na-agbado ọkụ n'otu ọsọ njem dị ka ọnọdụ kwesịrị ekwesị.
Mbelata okpomọkụ emetụtara mpaghara yana obere mgbagha n'ihi arc dị warara.

 

Nchacha kacha

Enwere ike nweta nke a site n'itinye njikwa ahụ n'ọnọdụ nke ga-eme ka ọ dịkwuo ogologo oge iji nọrọ na nkeji ọkara dị mma n'ihe gbasara okirikiri ọkara na-adịghị mma.Nke a ga-enye ohere ka ejiri ihe nhicha dị ugbu a na-arụsi ọrụ ike.Ekwesiri iburu n'uche na enwere oge ihicha kacha mma mgbe nke a ga-eme ka ihicha ozo ghara ime na ikike nke imebi electrode ka ukwuu.Mmetụta dị na arc bụ ịnye ọdọ mmiri weld sara mbara nke nwere ntinye na-emighị emi.