Engineered for industrial-scale metal deformation, our Head Stretching Mold provides a robust solution for fabricating high-integrity pressure vessel ends. By leveraging advanced metallurgy and precision-ground geometries, this tooling system optimizes material flow during the deep-draw phase. Whether you are processing austenitic stainless steel or high-tensile carbon sheets, our mold designs minimize internal stress and maximize output consistency.
I. Structural Integrity & Alloy Selection
The core of our stretching tool is forged from premium D2 or SKD11 tool steel, undergoing a multi-stage cryogenic treatment. This process refines the grain structure, providing a surface hardness of HRC 60-62. This translates to a mold that resists galling even under the extreme pressures required for thick-walled head stretching.
II. Advanced Blank-Holder Dynamics
Unlike conventional dies, our system incorporates an intelligent blank-holding pressure distribution. This ensures that the material is gripped with variable force across the flange area, effectively eliminating wrinkling while preventing excessive thinning of the center dome-a critical factor for passing safety inspections in tank production.
III. Optimized Lubrication Micro-Geometry
The contact surfaces of the punch and die are finished with a specialized cross-hatch texture or optional DLC (Diamond-Like Carbon) coating. This micro-topography retains lubricants more effectively during the stroke, reducing heat buildup and extending the operational interval between maintenance cycles.
Operational Compatibility (User Guide)
Machine Type: Compatible with Double-Action Hydraulic Presses (600T - 2000T+).
Forming Speed: Optimized for 150mm/s to 400mm/s depending on material grade.
Media Support: Recommended for use with high-viscosity drawing oils or dry-film lubricants.
Industry Standards: Supports production compliant with ASME Section VIII and PED requirements.
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