Introduction: Deep 3D Curves and Shapes
Standard punch presses can tear metal sheets if you try to make extra deep 3D designs. Therefore, engineers use hydraulic cold pressing for heavy 3D metal tags, deep curves, and thick medallions.
Instead of hitting the metal with a sharp strike, hydraulic presses apply smooth, heavy fluid pressure over several seconds. As a result, the metal stretches gently into complex shape cavities without cracking.
How Hydraulic Pressing Works
This process shapes heavy metal using simple controlled steps:
- First, operators place flat, thick metal sheets onto the hydraulic mold.
- Next, hydraulic clamps hold the sheet edges tightly to prevent wrinkles.
- Then, fluid pressure drives the main ram down smoothly to stretch the metal into shape.
- Finally, workers heat-treat (anneal) the metal if extra deep forming passes are needed.
Core Process Advantages
- Extra Deep 3D Relief: Easily forms high steps, curved dome profiles, and deep organic patterns.
- Zero Stress Cracks: Smooth, steady pressure prevents thin spots and surface tearing.
- Heavy Metal Thickness: Works easily on thick metal sheets from 0.5mm to 2.0mm.
- Solid Tactile Feel: Delivers heavy, thick metal badges that convey luxury quality immediately.
Quality Control Focus
- Preventing Thinning: Engineers run computer simulations to make sure corner metal walls stay strong and thick.
- Clean Surface Guarantee: Heating steps leave minor oxide scales behind. Therefore, we use acid washes to keep the metal surface clean for plating.
- 100% Crack Inspections: Every piece undergoes lens checks to ensure zero micro-cracks along curved edges.
Typical Industry Applications
- Spirits and Wine Packaging: Heavy bottle medallions, curved neck tags, and wooden box centers.
- High-End Audio Gear: Micro-curved metal faceplates and deep logo emblems.
- Bespoke Crests: Commemorative metal badges and heavy luggage trims.
Easy Design Rules (DFM)
- Avoid vertical $90^\circ$ side walls on deep shapes. Always add sloped angles so the metal stretches smoothly.
- Maintain curved corner radiuses of at least 1.0mm to prevent stress buildup.
- Keep overall shapes symmetrical to balance stretching force during pressing.
Request Engineering Assistance
Do you need heavy, deeply shaped metal badges? Contact Dongguan Zhangying Hardware & Plastic Product Co., Ltd. today to discuss your 3D CAD files with our technical experts!
