I-powder metallurgy iwuhlobo olusha lobuchwepheshe bokubumba obuseduze, obusebenzisa ukuncibilika, ukufudumeza, umjovo nokucindezelwa kwempushana yensimbi ukuze kuqhutshwe ukubumba okudingekayo.Kwezinye izinto ezikhethekile ezifana nezinsimbi eziphikisayo, izinsimbi eziphikisayo, i-alloy ephezulu nokunye.Ngakho yiziphi izici ezithinta ikhwalithi ye-powder metallurgy pressing forming of izingxenye zemoto?

Ⅰ: Umthelela wokucindezelwa kokwenza ukufa

Kusobala ukuthi ukufa kubalulekile kubuchwepheshe bokwakha obucindezelayo.Kunconywa ukuthi usebenzise i-female die noma i-mandrel eyenziwe nge-carbide enosimende, i-powder high-speed steel nezinye izinto.Lapho i-fa (njenge-cavity yangaphakathi ye-female die kanye nobubanzi obungaphandle be-mandrel) isebenza, i-surface roughness encane, kungcono ukunciphisa isici sokungqubuzana phakathi kwezinhlayiya zempushana kanye nodonga lokufa.

Uma kungenalutho olukhulu noma oluyinkimbinkimbi, ukucindezela isikhathi eside kuzokwenza ukuthi isikhunta sesifazane sishise futhi siwohloke, idivayisi yokupholisa amanzi ingasetshenziswa ukunciphisa izinga lokushisa kwesikhunta sesifazane nokunciphisa isici sokungqubuzana.

Ngaphezu kwalokho, ekwakhiweni kwesikhunta sesifazane, kufanele sigxile emandleni nasekuqineni, okunganciphisa izinga lokushisa kwesikhunta sesifazane, kunciphise ukulahlekelwa kwengcindezi, futhi kuvimbele ukuqhekeka ohlelweni lokucindezela izingxenye zemoto.

Ⅱ: Umthelela wesikhunta nesithambiso

Enqubweni yokucindezelwa kwe-powder metallurgy nokwenza izingxenye zemoto, ngenxa yokulahlekelwa kwengcindezi okubangelwa ukungqubuzana phakathi kwempushana exubile nodonga lwesikhunta, ukusatshalaliswa kokuqina kwama-compact akulingani.I-Mixin Powder incoma ukusebenzisa isikhunta sokuqina okuphezulu noma okokugcoba okungcono.

Ⅲ: Umphumela wamafutha

Ukwengeza i-lubricant ku-metal powder exutshwe kunganciphisa ngempumelelo ukungqubuzana phakathi kwe-powder nodonga lwesikhunta, futhi kwenze ukusatshalaliswa kokuqina kwe-compact iyunifomu eyengeziwe.I-lubricant esetshenziswa kakhulu i-zinc stearate.Nakuba ingakwazi ukuthuthukisa izimo zokucindezela nokwenza, kulula ukukhiqiza ukuhlukaniswa ngemva kokuxubana ngenxa ye-density ephansi evulekile, futhi izingxenye ze-sintered zijwayele ukugoba nezinye izinkinga.

Ukusebenzisa i-lubricant enhle kungathuthukisa ngempumelelo ukungqubuzana phakathi kwempushana nodonga lwesikhunta, futhi kunciphise kakhulu iphutha lokuminyana kwe-compact.Esicini sokuxuba i-powder, ukunakwa kufanele kukhokhwe endleleni yokuxuba i-powder, enganciphisa futhi ukungqubuzana.

Ⅳ: Ithonya lamapharamitha okucindezela

1: Isivinini esicindezelayo

Uma isivinini sokucindezela sishesha kakhulu, sizothinta ukufana kobuningi be-compact, futhi sizokhiqiza imifantu.Kungcono ukusebenzisa umshini wokwenza i-hydraulic powder ukuze ukhiqize.

2: Isikhathi sokubamba ingcindezi

Ukuminyana kwe-compact okwakhiwa ukucindezelwa kwe-powder metallurgy kwezingxenye zemoto kungakhuliswa kakhulu ngaphansi kwengcindezi yokucindezela enkulu kanye nesikhathi esifanele sokubamba.

3: Ukwakheka kwamabhuzu okuphakela impushana

Uma isicathulo se-powder feeding esijwayelekile sisetshenziselwa ukulayisha i-powder, kuzodala ukugcwaliswa kwe-powder engalingani phezulu nangaphansi kwe-mold cavity noma ngaphambili nangemuva, okuzothinta ikhwalithi yokungenalutho.Ukuthuthukisa noma ukuhlela kabusha isicathulo sokudla impushana kungathuthukisa inkinga yokufana kokulayisha i-powder.