Press Brake Punch

High-Precision Press Brake Punch: The Core of Quality Sheet Metal Bending

What is a Press Brake Punch?

• Special molds used with bending machines

• Core parts: upper die (punch) and lower die

• Works by squeezing metal between upper and lower dies

• Bends metal into shapes like 90° angles, U-shapes, V-shapes

• Widely used in: mechanical manufacturing, sheet metal, hardware, cabinet making

Advanced Material & Heat Treatment

• Core Hardening: Keeps the tool strong under high pressure

Core Components & Working Principle

Upper Die (Punch)

Lower Die

Working Principle

• Place metal sheet on the lower die

• Slider moves the upper die down to press the sheet

• Sheet bends to match upper and lower die shapes (permanent deformation)

• After reaching set stroke and pressure, bending is done

• Upper die moves back; take out the finished workpiece

Characteristics of Press Brake Dies

• High Rigidity & Wear Resistance: Made of quality alloy steel with precise heat treatment. Hard, tough, and long-lasting under heavy loads.

• Mold Customization: Punches and dies can be made into arcs, goosenecks, or special shapes. V-grooves can have different widths for complex bending needs.

• High Compatibility: Tool size (height, shank type, mounting size) fits the bending machine’s clamping system, stroke, and tonnage.

• Standardization & Serialization:

• Follows universal standards (fits Amada, Trumpf, Wila; ready to use)

• Standard 835mm segmented combination (unit: mm): 10, 15, 20, 40, 50, 100, 100 (left ear), 100 (right ear), 200, 300

• Total length: 835mm

• Segments can be mixed freely for different bending tasks

• Balances versatility and flexibility for all sheet metal bending needs

Common Types of Press Brake Punches

• Standard Punches: Good for basic 90° bending and general sheet metal work

• Gooseneck Punches: Deep "throat" for deep U-shapes and return bends (no interference)

• Acute Angle Punches: For pre-bending, hemming, and sharp-angle forming

• Sash Punches: Perfect for narrow channels, door frames, and window frames

Common Classifications of Press Brake Dies

By Forming Shape

• Standard Straight Edge Die

• Sharp Angle Die

• Gooseneck Die

• Arc Die

• Irregular Shaped Die

By Application Scenario

• Standard Sheet Metal Bending Dies (for mild steel, galvanized steel; cost-effective)

• High-Strength Steel Bending Dies (thickened, hard; for stainless steel, high-strength alloy)

• Thin Material Specific Dies (precision-made; prevents warping, deformation, scratches)

By Installation Interface

• Amada / Promecam Type (fits Amada bending machines)

• Trumpf / Wila Type (fits Trumpf, Wila bending machines)

• New Standard Type (universal; fits most domestic bending machines)

How to Select Press Brake Dies

1. Match Material Characteristics

1. Fit the material’s tensile strength and springback

2. Mild steel: little springback (use 86°–88° punch for 90° bending)

3. Stainless steel/high-strength steel: more springback (use 85° punch or adjust angle)

2. Follow the "8× Principle"

1. Lower die V-groove width: V = 8 × material thickness (T)

2. Thin sheets (T ＜ 3mm): V = 6T (smaller fillets)

3. Thick sheets (T ＞ 8mm): V = 10T–12T (reduces force, prevents cracking)

3. Check Pressure Tonnage

1. Calculate required bending tonnage first

2. Tool load capacity must be higher than actual working pressure (10–15% safety margin)

3. Use thickened/segmented dies for thick plates/high-strength steel

4. Choose Punch Shape

1. Standard: general bending

2. Gooseneck: deep U-shapes

3. Acute angle: pre-bending, sharp angles

4. Custom: for curved/irregular workpieces

5. Ensure Equipment Compatibility

1. Shank type must fit the machine’s clamping system

2. Tool height must fit the machine’s slider stroke and workbench opening

Precautions for Selecting Press Brake Dies

• Don’t ignore material springback (causes wrong bending angles)

• Follow the 8× rule (prevents workpiece cracking and die damage)

• Ensure full compatibility with the bending machine (prevents installation failure)