Tool · across the trades

The flat pattern library

Sheet-metal figures with dimensions in millimetres, unfolded into one continuous cutting outline — contour, bend lines, bend allowance, seams and holes. Every figure carries an honest mark for how true the flat pattern is, so you can tell «this fits on the machine» from «this is an illustration».

45 figures · 377 ready-made presets · 22 can be driven by litres · 56 programmes · 11 groups

Insulation's own flat patterns

Universal tools

The box unfolder

Unfold a box or tray onto one sheet — enter litres or dimensions and get a printable shop drawing with bend lines and bend deduction.

Open the box unfolder →

3D-workshop

Turn every figure in space — including the ones that cannot be flattened. Good for understanding the shape before you cut.

Open the 3D workshop →

Filters

8 of 45 figures · Tank & vessel

Tank & vessel

8 figures

Tank and vessel

Exact flat pattern · Litre

Nozzle in a shell

Exact flat pattern

Dished end cap

Approximate flat pattern · Litre

Tank support — saddle, legs and skirt

Exact flat pattern

Two-part valve cover

Exact flat pattern

Flange box

Exact flat pattern

Cyclone and dust separator

Exact flat pattern · Litre

Orange-peel sphere

Approximate flat pattern · Litre

Used in these trades

Insulation Electrician Plumbing Carpenter Bricklayer Amu svejsning Amu teknisk isolering Anlaegsstruktoer bygningsstruktoer og brolaegger Autolakerer Automatiktekniker Bager og konditor Beslagsmed Bygningssnedker Baadmekaniker Cnc teknik Data kommunikation Dyrepasser Ejendomsservicetekniker Elektronik og svagstroem Entreprenoer landbrugsmaskin Ernaeringsassistent Finmekaniker Flytekniker Gastronom Glarmester Gourmetslagter Guld og soelvsmed Industrioperatoer Industritekniker Karrosseritekniker Koeletekniker Landbrug Lastvognsmekaniker Maritime haandvaerksfag Maskinsnedker Mediegrafiker Mejerist Mekaniker Metalsmed Overfladebehandler Plastmager Procesoperatoer Produktion og montage Produktoer Skibsmontoer Skiltetekniker Skorstensfejer Slagter Smed Stenhugger og stentekniker Stoeberitekniker Tagdaekker Tarmtekniker Teknisk designer Teknisk isolatoer Traefagenes byggeuddannelse Vaerktoejsuddannelsen Vvs energi

The figures also appear under the programmes as calculators — the same tool, the same maths, just framed by the trade. The library's figures are the only place the numbers live: a figure cannot say one thing in the library and another under a trade.

What the marks mean

Exact flat pattern: The surface is developable and the pattern is solved in closed form. The whole uncertainty sits in the K-factor — it belongs to the material and the machine, not to the geometry.
Approximate flat pattern: The surface is faceted or triangulated. The error is known and printed as a number on the drawing — it is not hidden.
Cannot be expanded: Doubly curved surface. There is no cutting contour and no DXF — only a blank-diameter range for pressing, or a petal split. A pretty pattern that does not fit is the worst error, so it is not drawn.
Litre-driven: You can type a number of litres instead of the dimensions. If that figure cannot be reached with the dimensions you have locked, you get an honest range — not a rounded dimension dressed up as an answer.

The vocabulary of bending

The words and formulas the trade uses for a flat pattern. The symbols are the same throughout Discebo: α is the bend angle in degrees, R the inside bend radius, t the sheet thickness and K the K-factor — all in millimetres.

Flat pattern (development) · Flat length · Bend allowance · Bend deduction · Outside setback · Compensation value v to DIN 6935 · K-factor · Neutral fibre · Bend angle · Inside bend radius · Sheet thickness · Fold line · Test bend

DIN 6935 covers only cold bending of flat products in structural steel. Stainless, aluminium, copper, brass and titanium zinc are not included — there the formulas are an extrapolation, and a test bend in the actual material settles it.