Umthelela Wegesi Evikelayo ku-Laser Welding
I-Laser Welder ephathwa ngesandla
Okuqukethwe kwesahluko:
▶ Yini Engakutholela I-right Shield Gas?
▶ Izinhlobo Ezihlukahlukene Zegesi Evikelayo
▶ Izindlela Ezimbili Zokusebenzisa Igesi Evikelayo
▶ Ungakhetha Kanjani Igesi Evikelayo Efanelekile?
I-Handheld Laser Welding
Umthelela Omuhle Wegesi Yesivikelo Esifanele
Ku-laser welding, ukukhethwa kwegesi yokuvikela kungaba nomthelela omkhulu ekwakhekeni, ikhwalithi, ukujula, nobubanzi bomthungo we-weld. Ezimweni eziningi, ukwethulwa kwegesi evikelayo kunomphumela omuhle ku-weld seam. Nokho, kungase futhi kube nemiphumela emibi. Imiphumela emihle yokusebenzisa igesi yokuvikela efanele imi kanje:
1. Ukuvikelwa okuphumelelayo kwe-weld pool
Ukwethulwa ngendlela efanele kwegesi evikelayo kungavikela ngempumelelo i-weld pool ekufakweni kwe-oxidation noma kuvimbele ngisho ne-oxidation ngokuphelele.
2. Ukuncishiswa kokufafaza
Ukwethula kahle igesi evikelayo kunganciphisa ngempumelelo ukuphalaza ngesikhathi senqubo yokushisela.
3. Ukwakheka okufanayo komthungo we-weld
Ukwethulwa kahle kwegesi evikelayo kukhuthaza ukusabalala kwe-weld pool ngesikhathi sokuqina, okuholela kumthungo wokushisela omfaniswano nobuhle.
4. Ukwenyuka kokusetshenziswa kwe-laser
Ukwethula kahle igesi eyisivikelo kunganciphisa ngempumelelo umthelela wokuvikela wensimbi yomusi noma amafu eplasma ku-laser, ngaleyo ndlela kwandise ukusebenza kahle kwelaser.
5. Ukunciphisa i-weld porosity
Ukwethula kahle igesi evikelayo kunganciphisa ngempumelelo ukwakheka kwama-gas pores kumthungo we-weld. Ngokukhetha uhlobo olufanele lwegesi, izinga lokugeleza, kanye nendlela yesingeniso, imiphumela emihle ingafinyelelwa.
Nokho,
Ukusetshenziswa okungalungile kwegesi yokuvikela kungaba nemiphumela elimazayo ekushiseleni. Imiphumela emibi ihlanganisa:
1. Ukuwohloka komthungo we-weld
Ukwethulwa ngendlela engafanele kwegesi evikelayo kungase kubangele izinga eliphansi lomthungo we-weld.
2. Ukuqhekeka nokunciphisa izakhiwo zemishini
Ukukhetha uhlobo lwegesi olungalungile kungaholela ekuqhekekeni kwe-weld seam kanye nokwehla kokusebenza kwemishini.
3. Ukwenyuka kwe-oxidation noma ukuphazamiseka
Ukukhetha izinga lokugeleza kwegesi okungalungile, noma ngabe liphezulu kakhulu noma liphansi kakhulu, kungaholela ekwandeni kwe-oxidation ye-weld seam. Kungase futhi kubangele ukuphazamiseka okukhulu kwensimbi encibilikisiwe, okuholela ekuweni noma ukwakheka okungalingani komthungo we-weld.
4. Ukuvikelwa okunganele noma umthelela ongemuhle
Ukukhetha indlela engalungile yokwethulwa kwegesi kungaholela ekuvikelekeni okunganele kwe-weld seam noma kube nomthelela omubi ekwakhekeni kwe-weld seam.
5. Ithonya ekujuleni kwe-weld
Ukwethulwa kwegesi yokuvikela kungaba nomthelela othile ekujuleni kwe-weld, ikakhulukazi ekushiseni kwepuleti elincane, lapho kuvame ukunciphisa ukujula kwe-weld.
I-Handheld Laser Welding
Izinhlobo zamagesi avikelayo
Amagesi avikelayo asetshenziswa kakhulu ekushiseleni nge-laser yi-nitrogen (N2), i-argon (Ar), ne-helium (He). Lawa magesi anezakhiwo ezihlukene zomzimba namakhemikhali, okuholela emiphumeleni ehlukahlukene kumthungo we-weld.
1. I-nitrogen (N2)
I-N2 inamandla e-ionization amaphakathi, aphezulu kune-Ar futhi aphansi kuno-He. Ngaphansi kwesenzo se-laser, i-ionize ngezinga elilinganiselwe, inciphisa ngempumelelo ukwakheka kwamafu e-plasma futhi ikhulise ukusetshenziswa kwe-laser. Nokho, i-nitrogen ingasabela ngamakhemikhali nama-alloys e-aluminium nensimbi ye-carbon emazingeni okushisa athile, yakhe ama-nitride. Lokhu kungandisa i-brittleness futhi kunciphise ukuqina kwe-weld seam, kuthinte kabi izakhiwo zayo zemishini. Ngakho-ke, ukusetshenziswa kwe-nitrogen njengegesi evikelayo yama-alloys e-aluminium kanye ne-carbon steel welds akukhuthazwa. Ngakolunye uhlangothi, i-nitrogen ingasabela ngensimbi engagqwali, yakhe ama-nitride athuthukisa ukuqina kwelunga lokushisela. Ngakho-ke, i-nitrogen ingasetshenziswa njengegesi evikelayo yokushisela insimbi engagqwali.
2. I-Argon Gas (Ar)
Igesi ye-Argon inamandla aphansi kakhulu e-ionization, okuholela ezingeni eliphakeme le-ionization ngaphansi kwesenzo se-laser. Lokhu akulungile ekulawuleni ukwakheka kwamafu e-plasma futhi kungaba nomthelela othile ekusetshenzisweni ngempumelelo kwama-lasers. Kodwa-ke, i-argon ine-reactivity ephansi kakhulu futhi cishe ayinakwenzeka ukusabela kwamakhemikhali ngezinsimbi ezivamile. Ukwengeza, i-argon iyabiza. Ngaphezu kwalokho, ngenxa yokuminyana kwayo okuphezulu, i-argon izika ngaphezu kwechibi lokushisela, ihlinzeka ngokuvikeleka okungcono kwe-weld pool. Ngakho-ke, ingasetshenziswa njengegesi evamile yokuvikela.
3. Igesi ye-Helium (Yena)
Igesi ye-Helium inamandla aphezulu kakhulu e-ionization, okuholela ezingeni eliphansi kakhulu le-ionization ngaphansi kwesenzo se-laser. Ivumela ukulawulwa okungcono kokwakheka kwamafu e-plasma, futhi ama-lasers angakwazi ukusebenzisana ngokuphumelelayo nezinsimbi. Ngaphezu kwalokho, i-helium inokusebenza kabusha okuphansi kakhulu futhi ayisheshi ukusabela kwamakhemikhali ngezinsimbi, okuyenza ibe igesi ekahle kakhulu yokuvikela i-weld. Kodwa-ke, izindleko ze-helium ziphezulu, ngakho-ke ngokuvamile azisetshenziselwa ukukhiqizwa kwemikhiqizo eminingi. Ivamise ukusetshenziswa ocwaningweni lwesayensi noma emikhiqizweni enenani eliphezulu.
I-Handheld Laser Welding
Izindlela Zokwethula I-Shielding Gas
Njengamanje, kunezindlela ezimbili eziyinhloko zokwethula igesi evikelayo: ukuvunguza ohlangothini lwe-off-axis kanye negesi yokuvikela i-coaxial, njengoba kukhonjisiwe kuMfanekiso 1 kanye noMfanekiso 2, ngokulandelana.
Umfanekiso 1: I-off-axis Side Side Blowing Shielding Gas
Umfanekiso 2: I-Coaxial Shielding Gas
Ukukhetha phakathi kwezindlela ezimbili zokufutha kuncike ekucabangeni okuhlukahlukene. Ngokuvamile, kunconywa ukusebenzisa indlela yokuvuthela eseceleni kwe-off-axis ukuvikela igesi.
I-Handheld Laser Welding
Izimiso Zokukhetha Indlela Yokwethula I-Shielding Gas
Okokuqala, kubalulekile ukucacisa ukuthi igama elithi "oxidation" lama-welds liyinkulumo ehlangene. Ngokombono, kubhekiselwa ekuwohlokeni kwekhwalithi yokushisela ngenxa yokusabela kwamakhemikhali phakathi kwensimbi yokushisela nezinto eziyingozi ezisemoyeni, njengomoya-mpilo, i-nitrogen, ne-hydrogen.
Ukuvimbela i-weld oxidation kuhilela ukunciphisa noma ukugwema ukuthintana phakathi kwalezi zingxenye eziyingozi kanye nensimbi enezinga eliphezulu lokushisa. Lesi simo sezinga lokushisa eliphezulu asihlanganisi nje kuphela insimbi ye-weld pool encibilikisiwe kodwa futhi sonke isikhathi kusukela lapho insimbi yokushisela incibilika kuze kube yilapho ichibi liqina futhi izinga lokushisa lincipha ngaphansi komkhawulo othile.
Isibonelo, ekushiseni ama-titanium alloys, lapho izinga lokushisa lingaphezu kuka-300 ° C, ukumuncwa kwe-hydrogen ngokushesha kwenzeka; ngaphezu kwe-450 ° C, ukumuncwa kwe-oxygen ngokushesha kwenzeka; futhi ngaphezu kuka-600 ° C, ukumuncwa kwe-nitrogen ngokushesha kwenzeka. Ngakho-ke, ukuvikela okusebenzayo kuyadingeka ukuze kushiselwe i-titanium alloy ngesikhathi sesigaba lapho iqina futhi izinga lokushisa layo lehla ngaphansi kuka-300 ° C ukuvimbela i-oxidation. Ngokusekelwe encazelweni engenhla, kuyacaca ukuthi igesi evikelayo ephephethwayo idinga ukuhlinzeka ngokuvikeleka hhayi kuphela echibini lokushisela ngesikhathi esifanele kodwa nasesifundeni esivele siqinile se-weld. Ngakho-ke, indlela yokuvuthela eseceleni ye-off-axis ekhonjiswe kuMfanekiso 1 ngokuvamile iyathandwa ngoba inikeza ububanzi obubanzi bokuvikela uma kuqhathaniswa nendlela yokuvikela i-coaxial eboniswe kuMfanekiso 2, ikakhulukazi endaweni esanda kuqiniswa ye-weld. Kodwa-ke, emikhiqizweni ethile ethile, ukukhetha indlela kufanele kwenziwe ngokusekelwe esakhiweni somkhiqizo kanye nokucushwa okuhlangene.
I-Handheld Laser Welding
Ukukhetha Okuqondile Kwendlela Yokwethula Igesi Yokuvikela
1. I-Straight-line Weld
Uma umumo wokushisela womkhiqizo uqondile, njengoba kukhonjisiwe kuMfanekiso 3, futhi ukucushwa okuhlanganyelwe kuhlanganisa amalunga ezinqe, ama-lap joints, ama-fillet weld, noma ama-stack weld, indlela ekhethwayo yalolu hlobo lomkhiqizo yindlela yokuvuthela eseceleni kwe-off-axis ekhonjiswe ku- Umfanekiso 1.
Umfanekiso 3: I-Straight-line Weld
2. Planar Enclosed Geometry Weld
Njengoba kuboniswe kuMfanekiso 4, i-weld kulolu hlobo lomkhiqizo inomumo ovaliwe we-planar, njengesiyingi, i-polygonal, noma umumo womugqa wezingxenye eziningi. Ukucushwa okuhlanganyelwe kungabandakanya amalunga ezinqe, ama-lap joints, noma ama-weld we-stack. Kulolu hlobo lomkhiqizo, indlela ekhethwayo ukusebenzisa igesi evikela i-coaxial eboniswe kuMfanekiso 2.
Umfanekiso 4: I-Planar Efakwe I-Geometry Weld
Ukukhethwa kwegesi yokuvikela ye-planar jeometry welds evalekile kuthinta ngqo ikhwalithi, ukusebenza kahle, kanye nezindleko zokukhiqiza ukushisela. Kodwa-ke, ngenxa yokwehlukahlukana kwezinto zokushisela, ukukhethwa kwegesi yokushisela kuyinkimbinkimbi ezinqubweni zangempela zokushisela. Kudinga ukucatshangelwa okuphelele kwezinto zokushisela, izindlela zokushisela, izikhundla zokushisela, kanye nomphumela we-welding oyifunayo. Ukukhethwa kwegesi yokushisela efaneleka kakhulu kunganqunywa ngokuhlolwa kokushisela ukuze kuzuzwe imiphumela emihle yokushisela.
I-Handheld Laser Welding
Isibonisi Sevidiyo | Glance for Handheld Laser Welding
Ividiyo 1 - Yazi Kabanzi mayelana nokuthi Iyini I-Handheld Laser Welder
I-Video2 - I-Versatile Laser Welding yezidingo ezihlukahlukene
Kunconywa Ukushisela I-Laser Ephathwayo Ephathwayo
Noma yimiphi imibuzo mayelana ne-Handheld Laser Welding?
Isikhathi sokuthumela: May-19-2023