Nheyo yeMIM compaction-A

1. Tsanangudzo yekuumba

Densify poda kuita girinhi compacts ine imwe chimiro, saizi, porosity uye simba, maitiro acho ndeyeMIM kuumba.

2. Kukosha kwekuumba

1) Iyo yakakosha poda metallurgy process iyo kukosha kwayo ndeyechipiri chete kune sintering.
2) Inonyanya kudzora uye inosarudza iyo yose kugadzirwa kwehupfu metallurgy kupfuura mamwe maitiro.
a) Kuti nzira yekugadzira ine musoro here kana kuti kwete inotema zvakananga kana ichigona kuenderera zvakanaka.
b) Kukanganisa maitiro anotevera (kusanganisira maitiro ekubatsira) uye kunaka kwechigadzirwa chekupedzisira.
c) Kukanganisa kugadzira otomatiki, kugadzirwa uye mutengo wekugadzira.

Compression moldingndiko kurodha simbi hupfu kana musanganiswa weupfu musimbi yekutsikirira mold (chikadzi mold), dzvanya hupfu kuburikidza nefa punch, uye mushure mekudzvinyirirwa kwadzikiswa, iyo compact inoburitswa kubva pachiumbwa chechikadzi kuti ipedze kuumba maitiro.

Iwo makuru mabasa e compression molding ndeaya:

1. Gadzira hupfu muchimiro chinodiwa;
2. Ipa compact ine chaiyo geometric dimensions;
3. Ipa inodiwa porosity uye pore modhi kune compact;
4. Ipa ma compacts simba rakakodzera kuitira nyore kubata.

Phenomena inoitika panguva yehupfu compaction:

1. Mushure mokumanikidza, porosity yemuviri wehupfu inoderedzwa, uye hukama hwehukama hwehuputi hunonyanya kukwirira kupfuura hupfu hwehupfu.
Iyo compaction inoderedza kureba kwehupfu, kazhinji compaction inodarika 50%

2. Axial pressure (positive pressure) inoshandiswa kumuviri wehupfu.Muviri wehupfu unoita semvura kune imwe nhanho.Kana simba rinoiswa kumadziro echikadzi mold, reaction force-lateral pressure inogadzirwa.

3. Sezvo poda yakasanganiswa, kuwanda kwekombiki kunowedzera, uye simba rekugadzirisa rinowedzerawo.

4. Pamusana pekukakavadzana pakati pezvimedu zvehupfu, kushandiswa kwekumanikidza hakuna kuenzana, uye kuwanda kwezvikamu zvakasiyana mu compact hazvina kuenzana.Iyo isina kuenzana density yegirinhi compact ine yakakosha zvakanyanya pakuita kwegirinhi compact uye kunyangwe chigadzirwa.

5. Mushure mekudzvinyirirwa uye kuderedzwa, ukuru hwegirini compact huchawedzera-kuburitsa elastic mushure mekuita.Elastic aftereffect ndicho chimwe chezvikonzero zvikuru zvekusachinja uye kupaza kweiyo compact.