Isithando somlilo sokumelana nebhokisi indlela yokusetha ipharamitha

1. Ukunqunywa kwezinga lokushisa kwesithando somlilo

Lapho ukushisa okusheshayo kusetshenziswa esithandweni somlilo sebhokisi, impilo yesevisi yocingo lokumelana ibhekwa. Ngokuvamile, izinga lokushisa lomlilo libekwe ku-920 ~ 940 ℃ (intambo yokumelana yenziwe nge-chromium-nickel material), 940 ~ 960 ℃ (i-resistance wire yenziwe nge-iron-chromium-aluminium material) noma 960 ～980℃ (Intambo yokumelana into equkethe izingxenye ze-alloy ezifana ne-niobium ne-molybdenum).

2. Ukunquma inani lesithando somlilo esifakiwe

Inani lesithando somlilo elifakiwe ngokuvamile linqunywa ngokuya ngamandla esithandweni somlilo kanye nendawo esetshenziswayo. Isimiso siwukuthi: ubuso bodonga lwesithando somlilo weqoqo lokuqala lezinto zokusebenza lufinyelele izinga lokushisa elicacisiwe ngaphambi kokuba isithando somlilo sifakwe, futhi izinga lokushisa lomlilo lingabuyela ngokushesha ekushiseni okucacisiwe ngemva kokufakwa ngakunye. Uma umthwalo wesithando somlilo ukhulu kakhulu futhi awuhambisani namandla esithando somlilo, izinga lokushisa lomlilo ngeke libuyiselwe isikhathi eside, okuzothinta ukufaneleka kokubala kwesikhathi. Ekukhiqizeni ngobuningi, “ingancishiswa ibe izingxenye” ​​futhi yenziwe ngokuqhubekayo ngamaqoqo.

3. Ukunqunywa kwesikhathi sokushisa

Isikhathi sokushisa esisheshayo ngokuvamile sibalwa ngokuya ngosayizi osebenzayo we-workpiece cross section, futhi sinqunywa ngokuya ngesimo sangempela nolwazi lwangaphambilini:

(1) Isikhathi sokushisisa ngokushesha sesiqephu esisodwa singabalwa ngale ndlela elandelayo:

t=isikhangiso

Lapho t: isikhathi sokushisisa ngokushesha (izi)

a: Isikhathi sokushisa esisheshayo (s/mm);

d: Ububanzi obusebenzayo noma ukujiya kwesiqeshana sokusebenza (mm).

Esithandweni sokumelana nohlobo lwebhokisi, ububanzi obusebenzayo noma ukujiya kwe-workpiece ingaphansi kuka-100mm, futhi isikhathi sokushisa esisheshayo i-coefficient a yi-25-30s / mm;

Ububanzi obusebenzayo noma ukujiya kocezu lokusebenza bukhulu kuno-100mm, futhi isikhathi sokushisa esisheshayo i-coefficient a ngu-20-25s/mm.

Bala isikhathi sokushisa esisheshayo ngokuya ngefomula engenhla, okufanele ilungiswe ngokufanele ngokuya ngezinga lokushisa elinqunyiwe lesithando somlilo futhi linqunywe ngemva kokudlulisa ukuqinisekiswa kwenqubo.

(2) Lapho izingxenye zikhiqizwa ngamaqoqo, ngaphezu kokubalwa kwefomula engenhla, isikhathi sokushisisa ngokushesha kufanele sengezwe ngokuya ngevolumu yesithando somlilo esifakiwe (m), ukuminyana kwesithando somlilo kanye nendlela yokubeka:

Lapho m＜1.5kg, asikho isikhathi esengeziwe;

Uma m=1.5～3.0kg, engeza u-15.30s;

Lapho m=3.0～4.5kg, 30～40s eyengeziwe;

Uma m=4.5–6.0kg, engeza u-40～55s.