Calculation of basic parameters for screwy driving gear
(Preračun osnovnih parametrov za dvozglobni prenosnik:Vijačno gonilo)


1. You must give a medium diameter of motive screw
PODAJTE SREDNJI PREMER GIBALNEGA VIJAKA[dm]: [mm]
2. You must give a medium diameter of contact to the grounding
PODAJTE SREDNJI PREMER NALEGANJA NA PODLAGO[Dm]: [mm]
3. You must give a gradient of screw
PODAJTE KOT VZPONA VIJACNICE: [°]

4. Choose an angle of coil of the screw:
IZBERITE KOT NAVOJA VIJACNICE:
Kot navoja 20°
Kot navoja 40°
Kot navoja 60°
Kot navoja 80°
Kot navoja 120°

5. Choose a coefficient of friction for selfblocking screwy driving gear:
IZBERITE KOEFICIENT TRENJA ZA SAMOZAVORNOSTNO VIJACNO GONILO:

Between female screw and screw
MED MATICO IN VIJAKOM:

    Type of material (Vrsta materiala)

    Screw (Vijak)

    Female screw (Matica)

    Steel (jeklo)

    Casting (litina)

    Steel (jeklo)

    Cu-Zn-alloy (Cu-Zn-leg.)

    Steel (jeklo)

    Cu-Sn

    Steel (jeklo)

    Plastic material (umetne mase)


    Suho trenje
    Coefficient of friction 0.21
    Coefficient of friction 0.17
    Coefficient of friction 0.17
    Coefficient of friction 0.10


Mazano trenje
Coefficient of friction 0.10
Coefficient of friction 0.10
Coefficient of friction 0.10
Coefficient of friction 0.04

    Between female screw and grounding
    MED MATICO IN PODLAGO ( PODLAGA JE NAMESCENA NA LEZAJ)


    Coefficient of friction:
    Koeficient trenja:


    6. Choose a coefficient of friction for selfbraking screwy driving gear:
    IZBERITE KOEFICIENT TRENJA ZA SAMOZAVORNOSTNO VIJACNO GONILO:

    Between female screw and screw:
    (MED MATICO IN VIJAKOM:)
      Type of material (Vrsta materiala)

      Screw
      (Vijak)

      Female screw
      (Matica)

      Steel (jeklo)

      Steel (jeklo)

      Steel (jeklo)

      Casting iron or gun metal (lito zelezo ali bron)


      Dry friction
      (Suho trenje)
      Coefficient of friction 0.10
      Coefficient of friction 0.18


      Oiling friction
      (Mazano trenje)
      Coefficient of friction 0.03
      Coefficient of friction 0.05

    Between female screw and grounding
    MED MATICO IN PODLAGO ( PODLOGA JE NAMESCENA NA LEZAJ)

    Coefficient of friction:
    (Koeficient lepenja)

    Rezultati!

    Factor of selfblocking R:
    (FAKTOR SAMOZAVORNOSTI R:) [/]
    Factor of selfbraking B:
    (FAKTOR SAMOZAVORNOSTI B:) [/]
    Maximum gradient of screw for selfblocking driving gear:
    MAKSIMALNI KOT VZPONA VIJACNICE ZA SAMOZAPORNO GONILO: [°]
    Maximum gradient of screw for selfbraking driving gear:
    MAKSIMALNI KOT VZPONA VIJACNICE ZA SAMOZAVORNO GONILO:     [°]

    IZRIS DIAGRAMOV!