Lineare Zuschnittoptimierung

Steel & metal

Steel cutting calculator

RHS, SHS, angle, channel, flat bar, rebar: give it your cut list and the lengths your supplier stocks, and it works out the fewest lengths to buy. Kerf, mitres and the offcut rack all included. Free, no account.

Einstellungen

Käufliches Rohmaterial ?

Menge für unbegrenzten Vorrat leer lassen.

Ihre Reststücke ?

Gratis-Längen aus Ihrem Regal. Werden verwendet, wenn sie helfen; zählen nie als Kauf.

Benötigte Zuschnitte ?

Tab-Taste im letzten Feld fügt eine neue Zeile hinzu. Eingabetaste springt eine Spalte nach unten. Alt+N fügt eine Zeile hinzu, Alt+P öffnet das Einfügen-Fenster, Strg+Eingabe startet die Berechnung. Vollständige Anleitung.

Steel lengths suppliers stock

RHS, SHS, angle (AU/NZ/UK) 6.0, 8.0 m
Structural sections 9.0, 12.0 m
Merchant bar, flat, round 6.0 m
Rebar 6.0, 12.0 m
Imperial mill lengths (US) 20, 24, 40 ft
Aluminium extrusion 5.0, 6.5 m

Blade widths on metal

Cold saw 2 to 2.5 mm
Abrasive cut-off disc 1 to 2 mm
Horizontal bandsaw 0.8 to 1.5 mm
Plasma 1 to 3 mm
Laser 0.1 to 0.5 mm
Shear or guillotine 0 (nothing lost)

Shearing removes no material, so kerf is genuinely zero. Anything with a spinning blade is not, and a plan that assumes it is will leave you one piece short on every length. More on kerf.

Mitres, and the cut that makes two edges

Frames, gates, balustrade: the ends are angled, and an angled cut eats more of the bar than a square one because the blade crosses the section diagonally. Switch on angled cuts, give each piece its end angles and the material width, and two mitres that mate get nested so one pass of the saw makes both. The plan accounts for the extra material either way, which is where hand-drawn cut lists usually go wrong.

The offcut rack, which is worth real money

Steel offcuts are not scrap, they are stock you already own. Enter what is on the rack and the optimiser will either spend it first or use it only when it saves you a length, depending on which method you pick. Set a minimum useful remnant and it will stop handing you 80 mm stubs and leave you one length worth keeping instead.

Cheapest is not the same as fewest

If your supplier sells 6 m and 8 m at prices that are not proportional, the plan that buys the fewest lengths and the plan with the smallest invoice are different plans. Price your stock rows, pick Cheapest, and it will optimise dollars. Nothing else here quietly does that to you: the other four methods optimise material, on purpose.

FAQ

Does it handle different sections in one job?
Group your cut list by section (all the 50x50 RHS, then all the 75x50) and run each group. Mixing sections in one plan is meaningless anyway: you cannot cut a 50x50 piece out of a 75x50 length and call it done.
Can it optimise for the fewest saw setups?
Yes, and it is the method a fabricator usually wants. Cutter's Dream keeps the same number of lengths but groups identical parts so a run comes off one setup, and orders every length longest to shortest. On our 960-piece benchmark it took the setups from 147 down to 102.
How do I know the plan is actually the best one?
Because we prove it. Every plan is verified against your inputs before you see it, and when the green badge shows, the plan is provably the best that exists: no plan can use fewer lengths. The benchmark jobs are published so you can check that against any other tool.
Is there an API for our ERP or quoting system?
Yes. Same solver, JSON in and out. Plans and pricing, and the documentation.

Every plan is checked before you see it

Cut by cut: every piece present, everything inside the bar, blade width included. When the green badge shows, no plan on earth uses fewer bars for your cuts, and we Aufträge veröffentlichen that prove it.

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