Mark-Free Flap Bending Dies

Moving wings · Surface protection · Tooling interface matching

Core advantages

Mark-free bending

Moving wings support the sheet through the bend, helping reduce contact lines on stainless steel and aluminium surfaces.

Chromoly steel core

The reference design uses heat-treated 42CrMo for demanding loads. The illustrated 30% tool-life gain is a reference claim, not a universal service-life rating.

30-second changeover reference

A drop-in arrangement simplifies tool changes without additional shims in the reference design. Actual changeover time depends on the installation and workflow.

Typical applications

Architectural cladding and façade panels
Electrical enclosures and cabinets
Automotive chassis brackets
HVAC ducting and fittings
Stainless-steel kitchen equipment
Special U, W and hat-channel profiles

Flap bending die with two movable contact wings

Technical specifications

Parameter	Reference value	Selection check
Tool length (single piece)	1,000–8,000 mm	Working length and segmentation
Maximum bending load	1,000 kN/m	Permissible load for the selected section
Working temperature	−20°C–180°C	Actual process and lubrication conditions
Surface finish	Ra ≤ 0.2 μm	Contact surfaces and finished-part requirements
Hardness	58–60 HRC	Material and heat-treatment specification

Figures and parameters are selection references. Confirm the supplied model, dimensions, interface and load in the technical proposal.

Available tooling interfaces

GWMT interface matching

Match the machine holder, working height and existing tooling standard for a suitable GWMT arrangement.

European precision style

A 13 mm tang and rectangular groove are reference interface features; verify the mounting drawing and positioning requirement.

Common international interfaces

Reference layouts include a 20 mm tang, dual grooves and automatic clamping. Review compatibility and changeover access for the actual machine.

American precision style

A 0.500-inch (12.7 mm) tang is a reference option for suitable hydraulic press brakes and general fabrication applications.

Main reference sections

Single-V mark-free die · A

V = 15 mm
H = 110 mm
Thickness reference: 2.0–3.0 mm
Clamping interface: 13 × 20 mm

Single-V mark-free die · B

V = 20 mm
H = 110 mm
Thickness reference: 3.0–4.0 mm
Clamping interface: 13 × 20 mm

Original flap-die reference sheet with cross sections, dimensions and single-V examples — Original reference sheet. Its model numbers and dimensions are not confirmed GWMT stock codes; grouping labels and individual model ranges must be checked separately.

Get a tailored tooling proposal

Send the press-brake model, part drawing, sheet material and thickness, surface requirements and current die interface to discuss a suitable flap-die configuration.

Discuss your tooling requirements