Specialized in complex deformation analysis, our custom deep drawing die systems are built to eliminate wrinkling, tearing, and surface scratches during severe metal stretching operations. Optimized for processing carbon steel, stainless steel, and alloy plates, our tooling ensures uniform wall thickness and extreme structural integrity for pressure cylinders and deep enclosures.
2. Operational Performance Matrix
| Engineering Parameter PDF+ 1 | Single-Action Hydraulic Class PDF+ 1 | Double-Action Heavy Pressure Class PDF+ 1 |
|
Maximum Drawing Depth |
Up to 250 mm |
Up to 550 mm (Multi-pass) |
|
Blank Holder Force (BHF) Control |
Mechanical Spring / Urethane Pad |
Hydraulic Cushion / Nitrogen Cylinder Array |
|
Die Insert Steel Grade |
Cr12MoV / D2 Cold Work Steel |
TD-Coated Alloy Steel / Ampco Bronze Inserts |
|
Surface Treatment Technology |
Hard Chrome Plating (HRC 65) |
TD (Thermal Diffusion) Coating / PVD TiCN |
|
Wall Thinning Rate Tolerance |
Within 12% Maximum |
Controlled within 8% Maximum |
|
Guaranteed Mold Service Life |
500,000 Strokes |
1,500,000 to 3,000,000 Strokes |
3. Key Process Features
Advanced CAE AutoForm Simulation & Radius Optimization: Prior to machining, each die geometry undergoes rigorous CAE sheet metal forming simulation. Die shoulder radii and blank holder pressures are calculated to avoid material thinning failure and wrinkling.
Anti-Galling TD (Thermal Diffusion) Surface Coating: Die cavities undergo specialized TD thermal diffusion processing, yielding a vanadium carbide surface layer with a hardness up to 2800 HV. This prevents cold welding and scratching when drawing stainless steel.
Precision Nitrogen Gas Cushion Pressure System: Equipped with manifold-connected nitrogen gas springs to ensure constant, finely tunable clamping force across the blank holder during the entire stroke, eliminating uneven wall thickness.
4. Frequently Asked Questions (FAQ)
Q1: How do your deep drawing dies prevent blank tearing when processing deep cylinder shells?
A: We optimize the draw ratio (LDR) through progressive multi-stage forming steps and precise CAE die-radius profiling. Combined with nitrogen cushion pressure regulation, stress distribution remains uniform during deep extension.
Q2: How do you solve the issue of surface galling (scratching) when deep drawing stainless steel?
A: We apply TD (Thermal Diffusion) coating or utilize Ampco aluminum-bronze die inserts in high-friction drawing zones. These materials offer low friction coefficients and eliminate adhesive wear without requiring excessive heavy lubricants.
Q3: Can these dies be customized to fit specific hydraulic presses with hydraulic die cushions?
A: Yes. All die bases are designed according to your press bed dimensions, T-slot layouts, shut height specifications, and knock-out pin positions for direct bolt-on compatibility.
Q4: What testing procedures are conducted before shipping the completed drawing mold?
A: We perform full-scale press trial runs (T1 testing) on our in-house 1000-ton hydraulic press. Physical samples undergo wall-thickness ultrasonic measurement, CMM profiling, and pressure tightness testing before dispatch.
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