V-die set

01

Choose air bending or bottom bending

WILA calls air bending the method with the greatest flexibility to bend sheet metal on a press brake and says that with its tooling "air bending is the preferred bending method for the majority of bending applications": with segmented tooling, a limited set of tools can make a variety of bend angles and lengths, and its modular standard tools come in a range of standard lengths so almost any bending length can be built up. [1]

Bottom bending, by WILA's description, forms the angle by enclosing the sheet between punch and die. It suits higher accuracy than air bending, controlling springback and bending near cuts and holes, but needs more force and a different tool set for each bend radius; WILA offers 90° tools for it and says an angle accuracy of ±0.25° can be achieved under optimal circumstances. [2]

WILA also offers clamping and crowning systems, hydraulic, mechanical or pneumatic, for changing tools and for keeping the bend angle consistent along the product length. [1] [2]

Give the supplier the press brake make, tonnage, bed length and clamping system, sheet materials and thickness range, bend angles, inside radii and flange lengths, part lengths, bending method (air or bottom), any mark-free or coated-sheet requirement, and the segment lengths wanted.

02

Size the V-opening, shoulder radius and load rating

WILA marks maximum tool loads in kN per metre on the tool, in its catalogue and online: a 100 mm segment rated at 1,000 kN per metre can carry 100 kN, about 10 metric tons, as an evenly distributed load. It notes that the required bending force peaks at a bend angle of about 120°, so a 90° bend needs the same force as a 120° bend, and that horned tools have the same rating but their horns can deflect and cause angle deviation at part corners. [3]

The shoulder radius is the transition from the die's bearing surface into the V-groove. WILA says a larger radius spreads the force over a larger contact area so the sheet unrolls with less marking, helpful for coated or film-protected sheet, and combined with a larger V-opening can give mark-free bending. On its New Standard Premium tools, the shoulder radius is about 10% of the V-opening on 55 mm high tools and about 20% on 100 mm high tools. [4]

Editorial calculation: 1,000 kN per metre is 1 kN per millimetre of tool length, so a 100 mm segment carries 100 kN, as WILA states. [3]

03

Find V-die set manufacturers

The companies in the manufacturer list below show this product on their own websites. Confirm the legal seller, factory and scope for your order.

Ask any supplier for V-openings and angles, working heights, shoulder radii, maximum load in kN/m, segment lengths, tool steel and hardening, clamping system compatibility, precision grade, coatings for galling, and bend tables for your materials.

04

Trace what each part does

This is a functional reference built from the sources cited; it is not one maker's specification.

05

Fill the specification fields with values for your order

A V-die quotation needs values for your parts. The table explains each field, gives published values where a reviewed source states them, and says what to obtain from the supplier.

06

Send the press, part and tool data together

Paste it into your enquiry below or into an email to a maker, then replace every bracket.

Press brake: [make; tonnage; length; clamping]
Sheet: [material; thickness]
Bends: [angles; inside radii; flange lengths]
Method: [air; bottom]
Tools: [V-openings; heights; segment lengths]
Load: [kN/m required]
Finish: [mark-free; coated sheet]

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