Phone:
86-15852949220
NANJING ALAS INTERNATIONAL CO., LTD
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Every project has unique challenges (e.g., tight radii, deep box bending).
We use advanced CAD/CAM technology to make tooling that fits your machine perfectly.
This reduces setup time and ensures smooth use.
Installed on the machine’s moving slider (applies pressure).
Its shape (straight, sharp, gooseneck, arc) decides the workpiece’s outer shape.
Fixed on the machine’s workbench (supports the workpiece).
It usually has a V-shaped groove.
Groove width affects bending force, fillet size, and forming effect.
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 shape change).
After reaching the set pressure/stroke, the upper die moves back.
Take out the finished workpiece.
Strong & Wear-Resistant: Made of alloy steel (e.g., 42CrMo). Heat-treated to be hard (HRC45-HRC50) and durable.
Customizable: Make punches/dies in special shapes (arc, gooseneck) or V-grooves (8mm, 16mm, 24mm) for your needs.
Good Compatibility: Tooling fits your machine and workpiece perfectly (size, shape, requirements).
Standard Options: Conventional tooling fits common machines (Amada, Trumpf, Wille). Special tooling can be customized.
Standard Straight Edge: For regular straight bending (most common).
Sharp Angle: For small angles or springback correction (high precision).
Gooseneck: For U-shaped/deep channel workpieces (avoids interference).
Arc: For curved or rounded workpieces.
Irregular: Custom-made for special workpiece drawings.
Standard Sheet Metal: For mild steel, galvanized steel (cost-effective).
High-Strength Steel: Thick, hard material for stainless steel/alloy plates.
Thin Material: Precision-made to prevent warping, damage, or scratches.
Amada/Promecam: Fits Amada machines.
Trumpf/Wila: Fits Trumpf and Wila machines.
New Standard: Universal (fits most domestic machines).
Different metals have different springback (mild steel = little springback; stainless steel = more springback).
Use the right punch angle to fix springback (e.g., 86°~88° for mild steel; 85° for stainless steel).
Tooling material: 42CrMo (hardness HRC45-HRC50, strong and tough).
Core rule: V (groove width) = 8 × T (material thickness) – best for 3-8mm plates.
Adjust for thin plates (T＜3mm): V=6T (smaller fillet).
Adjust for thick plates (T＞8mm): V=10T~12T (reduces bending force).
Tooling must handle the machine’s pressure (no overloading – it breaks tooling/machines).
Calculate pressure using material thickness, tensile strength, and V-groove width.
Machine tonnage must be 10%-15% less than tooling’s maximum capacity.
Standard punch: Regular straight bending.
Sharp punch: Small angles or springback correction.
Gooseneck punch: U-shaped/deep channel workpieces (avoids interference).
Custom punches: For circular/irregular workpieces (match drawings).
Punch shank must fit the machine’s clamping system (Amada, Trumpf, etc.).
Tooling height must match the machine’s slider stroke and worktable height.
Don’t ignore springback (causes wrong angles).
Follow the "8x rule" (prevents workpiece cracking and tooling damage).
Check machine compatibility (prevents installation failure).
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) |
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.
Nanjing Alas International Co., Ltd. is a professional industrial tooling manufacturer focused on shear blades, bending dies, shredder blades, and custom wear parts. We offer full application engineering, material selection, setup guidance, and after-sales support to global customers.
Tell us your requirements, and our engineering team will provide professional solutions for blade specification, tool life optimization, and cost-effective production.