Deep Drawn Shells-Precision Spring

Why Choose US?

✔

Custom Solutions Tailored to your exact load, space, and environmental needs

✔

ISO 9001 Certified Rigorous quality control at every stage

✔

Rapid Prototyping Tested samples available in 5-7 days

✔

Global Supply Chain Reliable delivery across North America, Europe & Asia

Contact US

E-mail: sales@lihongsprings.com

Mobile: +86 176 6501 0974

WhatsApp: +86 150 1844 0213

FAX: +86 0769-8532 4238

Add: Room 101, Building 1, No. 446 Yanglang Road, Dalingshan, Dongguan, Guangdong, China

What is Deep Drawn Shells？

Deep drawn shells are precision metal components formed through multi-stage drawing processes, creating deep cavities with wall thickness maintained within ±0.02mm, widely used in battery casings, medical containers and automotive fuel systems.Stainless Steel Compression Springs

Key Advantages

Seamless Integrity

Weld-free construction ensures < 0.001cc/min leak rate.

Uniform Walls

Precision dies maintain ±0.02mm thickness tolerance.

Material Efficiency

80% less material waste vs machining.

High Aspect Ratio

Achieves extreme 5:1 depth/diameter ratio.

Surface Quality

Mirror polish achieves medical-grade Ra0.05μm.

How They Work

Metal blanks are progressively formed through die sets under hydraulic pressure, undergoing multi-stage reduction and stretching to create deep thin-walled structures.

Key Characteristics

✔️

Material Range - Processes 0.1-6mm stainless steel, copper alloys and exotics

✔️

Dimensional Accuracy - ±0.01mm diameter tolerance, ≤0.03mm concentricity

✔️

Production Rate - High-speed presses achieve 120pcs/minute

Key Design Factors

✔️

Thinning Control – Thicker wire = higher stiffness

✔️

Die Clearance – Maintains 1.05-1.2x material thickness gap

✔️

Lubrication – Nano-lubrication with ±50nm film control

Manufacturing Process

Blank Prep

Laser cutting ensures ±0.02mm contour accuracy.

First Draw

30-50% initial deformation creates basic form.

Annealing

750℃×2min in controlled atmosphere relieves stress.

Progressive Forming

4-12 stages achieve final dimensions.

Bottom Forming

Precision punching creates base features.

Trimming

CNC spinning ensures 0.01mm edge roundness.

Surface Treatment

Electropolishing or PVD coating.

Leak Test

Helium mass spectrometer verifies < 10⁻⁸Pa·m³/s.