Precision Press Brake Compound Dies

High-Precision Compound Dies in Modern Sheet Metal Bending

1. Parts & How Press Brake Tooling Works

Upper Die

• Mounted on the moving part of the bending machine

• Applies downward pressure

• Its shape (straight, sharp, gooseneck, arc, etc.) decides the outer shape of the bent part

Lower Die

• Fixed on the machine table

• Usually has a V-shaped groove

• V-groove width affects bending force, bend radius, and final shape

How It Works

1. Put the metal sheet on the lower die

2. The upper die presses down

3. The metal bends and keeps its new shape

4. When the set pressure and distance are reached, bending is done

5. Upper die moves back; you can take out the finished part

2. Features of Press Brake Tooling

Strong & Wear-Resistant

• Main material: 42CrMo alloy steel

• Heat-treated for hardness (HRC45–HRC50)

• Handles high pressure and friction without breaking or wearing fast

Customizable

• Punches can be made in arc, gooseneck, or special shapes

• Lower dies can have different V-widths (8mm, 16mm, 24mm, etc.)

Fits Machine & Part Well

• Die size must match the bending machine

• Shape must match part drawings to ensure accuracy

Standard & Ready to Use

• Common dies fit major brands (Amada, Trumpf, Wille)

• Special dies can be custom-made for your needs

3. Types of Press Brake Tooling

By Shape

• Standard straight dies: for general bending (most common)

• Sharp-angle dies: for small angles or fixing springback

• Gooseneck dies: for U-shaped and deep parts (avoids hitting bent edges)

• Arc dies: for rounded bends

• Irregular dies: custom-made for special parts

By Material Use

• Standard dies: for mild steel, galvanized steel (low cost)

• High-strength dies: for stainless steel, hard alloys (thicker, harder)

• Thin-material dies: prevents bending marks and warping

By Machine Interface

• Amada / Promecam type: fits Amada machines

• Trumpf / Wila type: fits Trumpf and Wila

• New Standard type: works with most Chinese-made machines

4. How to Choose the Right Tooling

① Match the Metal Material

• Different metals bend back differently (springback)

• Mild steel: little springback

• Stainless steel & high-strength steel: strong springback

• Choose die angle to fix springback and avoid cracking

② Follow the “8x Rule” for V-Groove

• Basic rule: V width = 8 × material thickness

• Thin material (under 3mm): use V = 6×T

• Thick material (over 8mm): use V = 10×T to 12×T

③ Do Not Exceed Machine Pressure

• Calculate bending tonnage before use

• Never overload dies — this breaks tools and machines

• Leave 10%–15% safety margin

④ Choose the Right Punch Shape

• Standard punch: general bending

• Sharp punch: small angles

• Gooseneck punch: deep U-shaped parts

• Arc / custom punch: round or special shapes

⑤ Match the Bending Machine

• Check shank / clamping type

• Make sure die height fits machine stroke

• Wrong fit causes installation failure or low efficiency

5. Important Tips When Choosing Tooling

• Always consider springback, or angles will be wrong

• Follow the 8x rule to avoid cracking parts and breaking dies

• Make sure the die fits your machine

6. Why ALAS Precision Compound Dies Are the Future

Make Complex Bending Simple & Fast

• Fewer setups = higher profit

• Compound dies do multiple bends in one tool

• Makes offset bends, hemming, and complex shapes faster

• Less handling error, higher output

Custom Solutions for Your Shop

• Works with Amada, Trumpf, LVD, Bystronic, etc.

• We design custom dies for your parts

• We provide full forming solutions, not just tools

• Helps you stay competitive

42CrMo International Standard Comparison Table (Essential for Selection)

• English: Precision Press Brake Compound Dies | Multi-V Bending Tools

• French (Français): Matrices composées pour presse-plieuse | Outillage de précision

• Italian (Italiano): Stampi composti per pressa piegatrice | Utensili di piegatura

• Portuguese (Português): Matrizes compostas para dobradeira | Ferramentas de alta precisão

• Polish (Polski): Precyzyjne matryce składane do pras krawędziowych

• Turkish (Türkçe): Hassas Abkant Pres Kompoze Kalıpları | Bükme Kalıpları

• Vietnamese (Tiếng Việt): Khuôn chấn tôn chính xác | Bộ khuôn dập uốn kim loại

• Thai (ภาษาไทย): แม่พิมพ์พับเหล็กแผ่นความแม่นยำสูง | อุปกรณ์เครื่องพับโลหะ

• Filipino: Precision na Press Brake Compound Die | Hulmahan sa Pag-bend ng Metal

• Arabic (العربية): قوالب ثني مكبس دقيقة | أدوات تشكيل المعادن عالية الدقة

• Hindi (हिन्दी): सटीक प्रेस ब्रेक कंपाउंड डाई | हाई-एक्यूरेसी फॉर्मिंग टूल्स

• Indonesian (Bahasa Indonesia): Matras Tekuk Plat Presisi | Cetakan Komposit Press Brake

• Malay (Bahasa Melayu): Acuan Kompaun Tekan Brek Tepat | Peralatan Pembentukan Logam

• Dutch (Nederlands): Precisie kantpers compound matrijzen | Buiggereedschap

• Swedish (Svenska): Precisionskantpressverktyg | Sammansatta bockverktyg

• Hungarian (Magyar): Precíziós élhajlító összetett szerszámok | Hajlító szerszámkészletek