WILA Type 28° U-Profile Hemming Punch for 1.2mm Sheet – H120mm, R1
This WILA Type 28° U-profile hemming punch features a 120 mm working height, 10 mm nose width, R1 mm tip radius and maximum load capacity of 50 ton/m. It is commonly used as part of a customized pre-bending and flattening solution for approximately 1.2 mm sheet metal, particularly when forming narrow U-shaped folded profiles.
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Description
This WILA Type U-profile hemming punch is designed for the pre-bending and flattening of narrow U-shaped sheet metal profiles. Its 10 mm-wide working nose enters the customized lower-tool profile and helps form or flatten the two folded sides of the component.
The 28° working angle supports deep pre-bending before the final flattening operation. Its R1 mm tip radius provides accurate bend-line control when processing suitable thin-sheet materials.
With a working height of 120 mm and maximum rated load of 50 ton/m, this punch is commonly used for approximately 1.2 mm sheet metal. It is manufactured from 42CrMo alloy steel and hardened to HRC54±2 for reliable wear resistance and forming accuracy.
The dimensions shown in the drawing represent one reference design. The working height, nose width, angle, radius, mounting structure and mating lower tool can all be customized according to the customer’s workpiece.
Key Features
- WILA Type upper-tool mounting profile
- Designed for U-profile pre-bending and flattening
- Commonly used for approximately 1.2 mm sheet
- 10 mm-wide working nose
- 28° working profile for acute pre-bending
- R1 mm punch-tip radius
- 120 mm working height
- Maximum load capacity of 50 ton/m
- Manufactured from 42CrMo alloy steel
- Working area hardened to HRC54±2
- Suitable for customized multi-stage forming
- Dimensions and mating lower-tool profiles can be customized
- Available in continuous or segmented lengths
Technical Specifications
| Parameter | Reference Specification |
|---|---|
| Tool Type | WILA Type Press Brake Upper Punch |
| Punch Profile | U-Profile Hemming Punch |
| Working Height (H) | 120 mm |
| Tool Body Width | 25 mm |
| Upper Clamping Width | 20 mm |
| Lower Working-Section Height | 58 mm |
| Working Nose Width | 10 mm |
| Tip Angle (α) | 28° |
| Tip Radius (R) | 1 mm |
| Typical Sheet Thickness | Approximately 1.2 mm |
| Maximum Load | 50 ton/m |
| Material | 42CrMo Alloy Steel |
| Hardness | HRC54±2 |
| Length | Continuous or segmented, customizable |
| Main Application | U-profile pre-bending and flattening |
These specifications describe the displayed design only. Tool height, width, angle, radius, working-nose dimensions and mounting profile can be modified according to the required component geometry.
Working Principle
This punch is normally used as part of a customized multi-stage forming process:
Pre-Bending
The 28° working tip creates the initial acute bends required on the sheet-metal profile.
U-Profile Forming
The workpiece is formed into the required narrow U-shaped or double-folded profile using a matched lower tool.
Flattening
The folded sections are compressed to achieve the specified final gap, width or closed condition.
The exact forming sequence depends on the workpiece shape and mating lower-tool design. Some components may require separate pre-bending and flattening operations, while a customized tooling system may combine multiple functions.
Typical Applications
This U-profile hemming punch can be used for:
- Forming narrow U-shaped folded profiles
- Pre-bending approximately 1.2 mm sheet
- Flattening double-folded sheet-metal edges
- Producing reinforced edges
- Creating narrow channels and edge profiles
- Electrical cabinet and enclosure components
- Metal doors and access panels
- Machinery covers and protective guards
- Appliance and metal-furniture components
- Automotive and transportation sheet-metal parts
- Mild steel, stainless steel and aluminium fabrication
- Customized multi-stage press brake forming
The stated 1.2 mm thickness is a typical application reference rather than a fixed limit. Suitability depends on the material grade, ductility, profile width, bending length, required final gap and forming sequence.
Product Details & Manufacturing Quality
The 10 mm nose and 28° working tip are precision machined to control the profile width and bend position during forming. Consistent geometry helps the punch align accurately with the customized lower tool and supports repeatable production.
The punch is manufactured from selected 42CrMo alloy steel. Its working region is hardened to HRC54±2 to improve resistance to wear, indentation and deformation.
Because U-profile hemming applies force to a relatively narrow working section, forming pressure must be controlled carefully. The required force must remain within the rated capacities of the punch, matching lower tool, clamping system and press brake.
Standard & Custom U-Profile Hemming Tooling
WYS Machinery manufactures customized U-profile hemming punches, mating lower tools, acute-angle punches, flattening tools and complete press brake hemming solutions.
Customers can provide the finished component drawing, material grade, sheet thickness, bending length and required internal profile. Our technical team can design the upper and lower tools and recommend an appropriate forming sequence.
Available customization options include:
- Working height and overall tool width
- Working-nose width and length
- Punch angle and tip radius
- U-profile width and depth
- Final flattening gap
- Upper and lower mounting structures
- Continuous or segmented tool lengths
- Customized section arrangements
- Tooling for different sheet thicknesses
- Surface blackening or protective coating
- WILA, TRUMPF, LVD, Bystronic and other compatible mounting types
This product is manufactured as WILA Type compatible press brake tooling. It is not presented as an original WILA-manufactured product and does not imply official affiliation, authorization or endorsement by WILA.
