1. Engineering & Technical Product Description
Our custom-engineered metal stamping mold series is designed for ultra-precise motor laminations, EV drive motor stators, and transformer core manufacturing. Optimized for processing silicon steel sheets down to 0.2 mm thickness, this high-speed tooling system delivers flawless edge shear quality, automated interlock stacking, and extended continuous service life without burr degradation.
2. Technical Performance Matrix
| Technical Parameter | Standard Silicon Steel Class | Ultra-Precision Carbide Grade |
| Primary Material Handled | Non-oriented Silicon Steel (0.35 - 0.5mm) | Ultra-thin Cold Rolled Silicon Steel (0.2 - 0.35mm) |
| Punch & Die Insert Grade | SKH-51 High Speed Steel / DC53 | Micro-grain Tungsten Carbide (HRA 89-92) |
| Single Stroke Stamping Burr Height | < 0.03 mm | < 0.012 mm (Ultra-fine clearance) |
| Automatic Interlocking Stacking | V-notch Mechanical Interlock | Skewed Rotating 3D Interlock System |
| Die Life Span Between Regrinds | 1,500,000 Strokes | 4,000,000 to 6,000,000 Strokes |
| Total Guaranteed Tooling Life | 20,000,000 Strokes | Exceeding 120,000,000 Strokes |
3. Core Technical Highlights
Automatic Skewed Rotational Stacking Integration: Engineered with servo-driven rotational stations that rotate the lamination strip during indexing. This compensates for material thickness variations in silicon steel coils, producing perfectly vertical and balanced motor rotor stacks.
Sub-Micron EDM & Profile Grinding Clearance: Using Japanese high-precision wire-cut machines and optical profile grinders, cutting clearances between punches and carbide dies are held to 0.005 mm per side, effectively preventing electromagnetic loss caused by edge burrs.
Ultra-Rigid Guided Tool Holder Assembly: Equipped with ball-bearing guide pillars and hardened steel die plates to withstand high-frequency impact vibrations up to 600 SPM, eliminating punch deflection during continuous production runs.
4. Frequently Asked Questions (FAQ)
Q1: How does your metal stamping mold ensure minimal burr height on thin silicon steel sheets?
A: We employ sub-micron optical profile grinding and EDM machining to maintain an optimal cutting clearance ratio (3% to 5% of material thickness). Coupled with tungsten carbide inserts, burr heights are maintained under 0.015 mm for millions of strokes.
Q2: Can the progressive mold perform automatic interlocking and skewing for EV motor rotors?
A: Yes. Our advanced progressive molds can be built with integrated pneumatic or servo-driven indexing units. They perform automatic interlocking, counter-boring, and angular skewing inside the mold to deliver fully assembled rotor cores directly off the press.
Q3: What maintenance routines are required to achieve the guaranteed 100+ million stroke die life?
A: Regular sharpening (re-grinding 0.05-0.10mm off punch faces every 3-5 million strokes) is essential. We provide precise sharpening limit indicators on all punches and include complete grinding allowances in our technical manual.
Q4: How do you verify the coaxiality and dimensional accuracy of stator core samples?
A: We perform 100% CMM inspection, air gauge tolerance testing, and iron loss (core loss) electromagnetic testing on T1 sample stacks before dispatching them along with full inspection certificates.
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