LVD Type V100 78° Heavy-Duty Single-V Press Brake Die

The WYS LVD-type V100 lower die is a heavy-duty press brake tool designed for bending relatively thick sheet metal, large components and products requiring a wide V-opening.

It features a 100 mm V-opening, commonly designated as V100, together with the standard 78° groove angle widely used in LVD-style press brake tooling. This groove angle provides sufficient clearance for controlled overbending while maintaining versatility for common sheet-metal and plate-forming applications.

The die has an overall height of 169 mm, including a 150 mm effective working height, and an overall width of 130 mm. Its strong cross-section provides stable support for the large V-opening and a maximum rated load capacity of 180 ton/m.

Key Features

• LVD-type heavy-duty single-V lower die
• 100 mm V-opening, commonly designated as V100
• Standard 78° LVD V-groove angle
• 169 mm overall height
• 150 mm effective working height
• Robust 130 mm overall tool width
• Maximum load capacity of 180 ton/m
• Suitable for relatively thick sheet metal and plate
• Wide V-opening helps reduce air-bending force
• Produces a larger natural inside bend radius
• 78° groove permits controlled overbending
• Suitable for compensating for material springback
• Elevated working position provides additional clearance
• Precision-machined V-groove, shoulders and mounting surfaces
• Available as full-length or segmented tooling
• Optional black oxide treatment and surface coatings
• Dimensions, working profile and mounting interface can be customized

Technical Specifications

Typical Applications

• Air bending relatively thick mild-steel plate
• General applications requiring a V100 lower die
• Forming workpieces with larger inside bend radii
• Heavy sheet-metal and industrial plate fabrication
• Production of structural channels and support profiles
• Manufacturing machine frames and heavy-duty covers
• Large cabinets and industrial enclosures
• Construction and agricultural machinery components
• Z-shaped and offset products requiring additional clearance
• Controlled overbending for springback compensation
• LVD-type CNC, hydraulic and servo-electric press brakes

A V100 opening is commonly considered for approximately 10–12 mm mild steel under general air-bending conditions. This is only a practical reference. Stainless steel, high-strength steel and other materials may require different bending forces, punch radii or V-opening selections.

Standard 78° LVD Groove Angle

The 78° V-groove is a standard and widely used angle in LVD-style lower tooling. Compared with a 90° groove, it provides additional angular clearance for overbending.

This allows the press brake operator to bend the material slightly beyond the required finished angle to compensate for elastic springback. When matched with a suitable upper punch and correct CNC settings, the die can be used to produce common final angles such as 90°.

The finished angle is determined by:

• Upper-punch angle
• Punch penetration depth
• Material properties
• Plate thickness
• Inside bend radius
• Material rolling direction
• Actual springback

The 78° design therefore provides a practical combination of standard compatibility, general versatility and springback compensation capability.

V100 Opening for Thick-Plate Air Bending

The 100 mm V-opening is designed for relatively thick sheet material and applications requiring a larger inside bend radius.

Compared with a narrower die opening, V100 can offer:

• Lower required air-bending force
• A larger natural inside bend radius
• More gradual deformation of thick plate
• Lower concentrated pressure at the die shoulders
• Improved suitability for large structural parts

Because the V-opening is relatively wide, the workpiece must have a sufficiently long flange to remain securely supported on both die shoulders. The required minimum flange and expected inside radius should be checked before production.

The correct V-opening should be selected according to the material type, tensile strength, plate thickness, target bend radius, minimum flange and available press brake tonnage.

169 mm Overall Height for Increased Clearance

The die has a 150 mm effective body and a 19 mm lower mounting section, giving it a total height of 169 mm.

This high-profile structure raises the V-groove and bending line above the press brake table. The increased height provides additional space for large workpieces and previously formed flanges, helping reduce interference during multi-step bending.

It can be particularly useful when producing:

• Large Z-shaped components
• Offset sheet-metal profiles
• Deep channels
• Products with long pre-bent flanges
• Large industrial sheet-metal assemblies

Actual clearance must be verified using the complete workpiece drawing, bending sequence and upper-punch geometry.

Heavy-Duty 180 Ton/m Load Capacity

The 130 mm-wide body provides stable structural support for the V100 groove and helps distribute bending force through the lower tool.

The maximum rated load is 180 ton/m. Before bending, the calculated forming force must be compared with the allowable capacity of the lower die, upper punch, tool holders, clamping system and press brake.

The usable capacity may also be affected by:

• Bending length
• Material tensile strength
• Plate thickness
• Full-length or segmented configuration
• Concentrated short-length bending
• Tool installation and operating condition

Although a wide V-opening can reduce the required bending tonnage, the complete tooling and machine system must still be checked before production.

Product Details / Manufacturing Quality

The die is manufactured from 42CrMo alloy steel to provide high strength, good toughness and resistance to deformation under demanding bending loads.

The V-groove, supporting shoulders, reference surfaces and lower mounting tang are precision-machined to maintain accurate alignment and stable force transmission. Applicable working areas can be hardened to HRC54 ± 2 to improve wear resistance and extend tooling life.

Quality inspection can include:

• V-opening measurement
• V-groove angle verification
• Overall and effective height inspection
• Tool-width measurement
• Straightness and parallelism inspection
• Mounting-interface verification
• Surface-hardness testing

The groove bottom uses a smooth radius transition to reduce excessive stress concentration. Its radius can be customized according to the plate thickness, upper-punch radius and required bending result.

Optional Black Oxide Finish and Surface Coating

Black oxide treatment is available to give the tooling a uniform professional appearance and provide a degree of corrosion protection during transportation and storage.

Application-specific coatings can also be provided according to the operating conditions. A suitable coating may improve wear resistance, reduce friction or minimize material adhesion during repeated bending.

Available surface options include:

• Standard precision-machined finish
• Black oxide treatment
• Anti-rust surface protection
• Wear-resistant coating
• Application-specific protective coating

The recommended treatment depends on the workpiece material, production volume, working environment and surface-quality requirements.

Full-Length and Segmented Tooling

The V100 lower die can be manufactured as a continuous full-length tool or divided into customized segments.

For a large lower die, segmentation can provide several advantages:

• Easier installation and handling
• More convenient storage
• Flexible bending-length combinations
• Localized bending capability
• Easier replacement of individual sections
• Suitability for boxes and special workpieces

The total tool length, segment quantity and individual segment lengths can all be manufactured according to customer requirements.

Standard & Custom Press Brake Tooling

WYS supplies standard and customized LVD-type punches, lower dies and complete press brake tooling combinations. The V100 opening, tool height, width and mounting structure can be modified according to the customer’s plate thickness, product geometry and press brake.

Available customization options include:

• V-opening width
• V-groove angle
• Groove-bottom radius
• Overall and effective height
• Tool body width
• Maximum load capacity
• Overall tool length
• Individual segment lengths
• Lower mounting-interface dimensions
• Material and hardness
• Black oxide treatment
• Wear-resistant or protective coatings
• Special forming profiles

Customers can send WYS their product drawings, material specifications, plate thickness, bending length and press brake information. We provide a free tooling design service to calculate the required force, select the correct V-opening and upper punch, verify the minimum flange and analyze possible workpiece interference before manufacturing.