Press Brake Tool: The Core of Precision Bending
Bending accuracy depends not only on the machine, but even more on the tooling. Press brake tooling is the true heart of the bending process. High‑quality molds directly decide bending precision, part consistency, and production efficiency.
What Are Press Brake Tooling & Bending Machine Dies?
Bending machine dies are specialized forming molds used with press brakes. They are the core working components for bending metal sheets, mainly composed of two key parts: the upper die and the lower die.
Basic Working Principle
Place the metal sheet on the lower die.
The slider drives the upper die down to press the sheet.
The sheet bends to match the dies (permanent plastic deformation).
After reaching the set pressure/stroke, the upper die returns.
Remove the finished workpiece.
Key Applications
Core Components of Press Brake Tooling
Upper Die (Punch)
Installed on the movable slider; applies active pressure. Its shape defines the outer contour of the bent part.
Common Upper Die Types
Standard Straight Edge Punch: For general straight bending (most widely used).
Acute Angle Tooling (Sharp Angle Punch): For small‑angle bending & springback compensation.
Gooseneck Punch: For U‑channels & deep box bending; avoids interference with bent flanges.
Arc Punch: For curved parts & rounded corner forming.
Custom Irregular Punch: For complex, non‑standard shapes.
Lower Die (Die)
Fixed on the workbench; provides support. Most use a V‑groove design.
Common Lower Die Types
Standard V‑Die: Basic V‑groove for general bending.
Multi‑V Die: Multiple V‑grooves for various material thicknesses.
Special Groove Die: Custom grooves for unique bending requirements.
Key Characteristics of High‑Quality Press Brake Tooling
High Rigidity & Wear Resistance
Main material: Alloy structural steel (e.g., 42CrMo).
Heat treatment: Quenching & tempering; hardness HRC45–52.
Benefits: Withstands high extrusion force & friction; long service life.
Full Customization
Punches: Custom shapes (arc, gooseneck, irregular).
Dies: Custom V‑groove widths (8mm, 16mm, 24mm) or special grooves.
Perfect Compatibility
Matches machine specs: Clamping system, slider stroke, tonnage.
Aligns with workpiece drawings: Ensures bending accuracy & pass rate.
Standardization & Serialization
Standard molds fit Amada, Trumpf, Wille, etc.
Special molds: Fully customizable for enterprise needs.
Common Classifications of Press Brake Tooling
By Forming Shape
Standard Straight Edge Tooling: Conventional straight‑edge bending.
Acute Angle Tooling: High‑precision sharp angle forming.
Gooseneck Tooling: U‑shaped & deep channel processing.
Arc Tooling: Curved & rounded corner bending.
Irregular Tooling: Custom for special workpiece drawings.
By Application Scenario
Standard Sheet Metal Tooling: For mild steel, galvanized steel (cost‑effective).
High‑Strength Steel Tooling: Thickened, high‑hardness for stainless steel & alloys.
Thin Material Tooling: Precision‑made to prevent warping & scratching.
By Installation Interface
Amada/Promecam Type: Compatible with Amada machines.
Trumpf/Wila Type: Compatible with Trumpf & Wila machines.
New Standard Type: Universal interface for most domestic machines.
How to Select the Right Press Brake Tooling
1. Match Material Characteristics
2. Follow the “8x Principle” (V‑Groove Selection)
3. Pressure Tonnage Limitation
4. Choose the Correct Punch Shape
Match punch to part: Standard, acute angle, gooseneck, arc, or custom.
Gooseneck Punch: Critical for deep U‑bends to avoid interference.
Acute Angle Tooling: Essential for high‑precision small‑angle bends.
5. Ensure Machine Compatibility
Shank Type: Match Amada, Trumpf, Wila, or New Standard clamping systems.
Die Height: Align with machine slider stroke & worktable opening.
Critical Selection Precautions
Always account for material springback to avoid angle inaccuracies.
Follow the 8x rule to prevent workpiece cracking & die damage.
Verify full machine compatibility to avoid installation failure.
In short: High‑quality press brake tooling is the foundation of reliable bending. Gooseneck punches, multi‑V dies, acute angle tooling, and custom molds all help achieve stable, high‑precision bending results.
42CrMo International Standard Comparison Table (Essential for Selection)
Country/Standard Organization | Standard Code | Corresponding Grade |
China (GB) | GB/T 3077 | 42CrMo or 42CrMo4 |
USA (AISI/ASTM) | ASTM A29 | 4140 |
International Organization for Standardization (ISO) | ISO 683-1 | 42CrMo4 |
Germany (DIN) | DIN EN 10083 | 1.7225 (or 42CrMo4) |
Japan (JIS) | JIS G4105 | SCM440 |
UK (BS) | BS 970 | 708M40 (EN19) |
Why 42CrMo Is More Durable Than Ordinary Carbon Steel？
42CrMo alloy steel offers significantly higher durability compared with ordinary carbon steel, thanks to its alloy composition, heat treatment performance, and mechanical properties.
It contains chromium(Cr), molybdenum(Mo) and manganese, which greatly improve:
Higher hardness and wear resistance
Better strength and toughness
Higher tensile and yield strength
Excellent performance under high pressure and heavy load
Longer service life in industrial applications
Ordinary carbon steel is soft, wears out quickly, and deforms easily under pressure.42CrMo maintains shape, stability even under long-term heavy working conditions, making it the ideal material for press brake toolingand molds.
