Proračun vučne sile mašine za provlačenje

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Ključne tačke:

  • Formula for calculating expected force:
    • Expected force (kgf) = Cutting width × Cutting depth / 1 tooth (mm) × Specific cutting resistance (kgf/mm²) × Number of simultaneous cutting teeth.
  • Safety load: 1.8 × Expected force (kgf).

Primjer izračuna:

  • Square spline broach: Ø20 × 16 × 4 × NT6
  • Heat-resisting steel, cutting length = 25mm
  • Pitch = 7.5
  • Number of simultaneous cutting teeth = 25 / 7.5 ≈ 3.3–4
  • Cutting depth = 25µm
  • Expected force: 4 × (6 × 0.025) × 0.4 × 4 = 1 ton
  • Safety load = 1.8 × 1 ton = 1.8 ton

Tabela dubine rezanja:

Material TypeRoundSplineSurface
Alloy steel10–2025–3030–70
Carbon steel10–2025–3550–75
Cast iron15–3525–3550–75
Malleable cast iron20–3525–3550–75
Light alloy metal25–3530–4050–100

Broach Cutter Length and Machine Stroke:

  • Broach cutter length + Length of rear end shank (Max) = (Max stroke) – (Cutting length).
  • Broaching length should be less than machine max stroke.
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