Gịnị bụ Resistance Welding na kedu ka ọ na-arụ ọrụ?

Ihe na-emetụta ịgbado ọkụ na-eguzogide

ịgbado ọkụ na-eguzogidebụ usoro ịgbado ọkụ nke na-eji ọkụ eletrik na-emepụta okpomọkụ iji jikọta ihe ndị na-emepụta ígwè. Dị ka e kwuru na mbụ, ụkpụrụ nke iguzogide ịgbado ọkụ tumadi ị ga Joule iwu nke kpo oku, ebe ọgbọ nke ịgbado ọkụ okpomọkụ bụ isi kpebisiri ike site parameters dị ka ugbu a, iguzogide, na ịgbado ọkụ oge. Enwere ike igosipụta ya site na usoro a:

Q = I²Rt

Pụtara nke oke ịgbado ọkụ ọ bụla:

Q - Okpomọkụ (J)

I - Welding current (A)

R - Nguzogide (Ω)

t - Oge ịgbado ọkụ (s)

Welding Ugbu a

Ihe dị ugbu a nwere mmetụta dị ukwuu na okpomọkụ a na-emepụta n'oge ịgbado ọkụ, dị ka egosiri na usoro. Uru square nke ugbu a na-emetụta okpomọkụ, nke pụtara na elu dị ugbu a, ngwa ngwa ọkụ ga-abawanye. Ya mere, mgbe ukpụhọde welding parameters tupu ịgbado ọkụ, ọ dị oké mkpa ịtọ kwesịrị ekwesị ugbu a. Ọ bụrụ na ịgbado ọkụ ugbu a dị oke obere, weld agaghị agbaze, ọ nweghịkwa isi njikọ ga-etolite. Ọ bụrụ na ihe dị ugbu a buru ibu nke ukwuu, isi njikọ ahụ ga-eto ngwa ngwa, na-eme ka ọgbaghara dị ukwuu n'oge ịgbado ọkụ na imebi electrodes.

A na-ekekarị ịgbado ọkụ ugbu a ka ọ bụrụ alternating current (AC) na direct current (DC), dị ka egosiri na eserese dị n'okpuru. Nkeigwe ịgbado ọkụanyị na-eji na-ekewa kpọmkwem ugbu a ntụpọ ịgbado ọkụ igwe na alternating ugbu a ntụpọ ịgbado ọkụ igwe. Igwe ịgbado ọkụ ozugbo dị ugbu a na-eji ọkụ ọkụ nke ụzọ atọ, na-ahụ maka nkesa ike kwụ ọtọ, ma nwee ike nweta oge ịgbado ọkụ karịa 1000 Hz, na-ebute izi ezi ịgbado ọkụ. Ha nwekwara uru nke ike dị ala na-achọ site na grid ike, na-eme ka ndị a na-echekwa ike welder na-ewu ewu n'etiti ndị na-emepụta ụlọ ọrụ. Igwe ịgbado ọkụ na-agbanwe agbanwe ugbu a nwere mmepụta 50Hz nke otu oge, ikike ibu dị elu na-aga n'ihu, yana nnukwu ihe achọrọ maka grid ike. Ọzọkwa, ha nwere obere ike ịgbado ọkụ, na-achọ ogologo oge ịgbado ọkụ.

Kpọtụrụ Nguzogide

Site na usoro a, ọ dị mfe ịhụ na nguzogide na-adaba na okpomọkụ a na-emepụta. Nke dị elu nke nguzogide, otú ahụ ka ọkụ na-emepụta n'oge ịgbado ọkụ. A na-ekesa nguzogide n'akụkụ dị iche iche nke electrode na workpiece. N'oge ịgbado ọkụ, nguzogide kachasị elu na-eme na ebe kọntaktị nke workpiece, na-ebute ọgbọ okpomọkụ kachasị elu. Ọzọ bụ nguzogide na ebe kọntaktị n'etiti workpiece na electrode. Otú ọ dị, ebe ọ bụ na electrode na-eme ka mmiri dị jụụ na ngwa ngwa na-ajụ oyi, okpomọkụ na-ebelata ngwa ngwa. N'aka nke ọzọ, kọntaktị na-eguzogide n'etiti workpieces, ọ bụ ezie na ọ na-apụ n'anya, na-adịghị mma okpomọkụ dissipation, na-eduga na elu okpomọkụ. Ya mere, ọ bụ naanị obere mpaghara n'etiti workpieces nwere ike iru okpomọkụ dị mkpa na-etolite a fusion isi na weld ọnụ.

Ọzọkwa, okpomọkụ na nrụgide electrode na-emetụta nguzogide ahụ. Ka okpomọkụ na-ebili, ike mkpụrụ ígwè na-ebelata, na-amụba mpaghara kọntaktị n'etiti workpieces na n'etiti workpiece na electrode, na-akpata ibelata nguzogide. Ịbawanye nrụgide electrode na-eme ka elu ọrụ ahụ dị nro, na-amụba mpaghara kọntaktị na ibelata nguzogide. N'ihi ya, e nwere a onu ebe, n'oge ịgbado ọkụ nke ahụkarị ihe, ndị na-eguzogide na-abawanye obere oge ka ike na, na mgbe ike gbanyụrụ na fusion isi ụdị, nguzogide na-amalite ibelata.

Oge ịgbado ọkụ

Ogologo oge ịgbado ọkụ, ka ọkụ na-esiwanye ike. Na usoro a, ugbu a na oge nwere ike ịkwado ibe ha. Mgbe ịchọrọ weld siri ike, ị nwere ike ịtọ ụda dị elu maka oge dị mkpirikpi iji mee ka okpomọkụ dị ngwa ngwa ma mepụta isi njikọ iji mezue ịgbado ọkụ ahụ. N'aka nke ọzọ, ị nwere ike ịtọ ụda dị ala ruo ogologo oge, mana enwere oke maka usoro a. Ọ bụrụ na edobere oge ahụ ogologo oge, ọ nwere ike iduga nfesa oke ma nwee ike ime ka electrode rapara. Ma ọ dị ugbu a ma ọ bụ oge, enwere oke. Mgbe ịtọ ntọala, ịkwesịrị ịtụle ihe na ọkpụrụkpụ nke workpiece, yana ike nke igwe ịgbado ọkụ.

Njirimara ihe

Ihe nke workpiece na-emetụta n'ụzọ dị ukwuu ya resistivity, nke na-arụ ọrụ dị mkpa na ịgbado ọkụ ọgbọ. Mgbe ịgbado ọkụ igwe anaghị agba nchara, nke nwere nnukwu resistivity na adịghị mma thermal conductivity, ọ na-adị mfe n'ịwa okpomọkụ ma na-esi ike igbasa ya, ya mere a na-achọ obere mmiri iyi. Mgbe ịgbado ọkụ aluminom alloys na ala resistivity na ezigbo thermal conductivity, ọ na-esiri ike ịmepụta okpomọkụ mana ọ dị mfe ịgbasa ya, ya mere achọrọ nnukwu iyi. Ọla dị ka ọlaọcha na ọla kọpa na-enwe mmetụta dị elu nke thermal conductivity na obere resistivity, n'ihi ya, ọ bụrụgodị na mmiri dị elu, ha anaghị ewepụta okpomọkụ dị ukwuu mana ha nwere ike iduga ya. Ya mere, ọla ndị a adabaghị maka ịgbado ọkụ na-eguzogide mana enwere ike iji ya dị ka ihe electrode.

Electrode Design na geometry

Ụdị na ihe nke electrode na-emetụtakwa mmepụta okpomọkụ. Mpaghara kọntaktị n'etiti electrode na workpiece na-emetụta njupụta dị ugbu a. Iji elektrọd eme ihe ugboro ugboro nwere ike ibute iyi na nrụrụ, ịbawanye mpaghara kọntaktị yana ibelata ike ịgbado ọkụ. Ya mere, anyị kwesịrị ịrụkwa ma dochie ndụmọdụ electrode ozugbo. The thermal conductivity na iguzogide electrode na-emetụta nnyefe okpomọkụ. Ya mere, anyị kwesịrị ịhọrọ ihe ndị nwere ezigbo conductivity thermal na obere nguzogide.

Nkwadebe elu

Ụdị na ihe nke electrodes na-emetụtakwa mmepụta okpomọkụ. Mpaghara kọntaktị n'etiti electrode na workpiece na-emetụta njupụta dị ugbu a. Mgbe a na-eji eletrọd anyị eme ihe ugboro ugboro ma na-agwụ ike, ọ na-abawanye mpaghara kọntaktị, na-eduga n'ike ịgbado ọkụ. Ya mere, anyị kwesịrị ịrụkwa na dochie electrode ndụmọdụ ozugbo. The thermal conductivity na resistivity nke electrodes na-emetụta nnyefe okpomọkụ. Ya mere, anyị kwesịrị ịhọrọ ihe nwere ezigbo thermal conductivity na ala resistivity.