Coil Forming-Precision Spring

Why Choose US?

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

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ISO 9001 Certified Rigorous quality control at every stage

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Rapid Prototyping Tested samples available in 5-7 days

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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 Coil Forming？

Coil forming is a manufacturing process that transforms metal wire into helical structures through precision winding, primarily used to produce springs, inductors and medical components with 0.1-50mm diameter precision.Stainless Steel Compression Springs

Key Advantages

High Precision

CNC control achieves ±0.01mm coil spacing accuracy.

Complex Structures

Produces tapered, variable-pitch and multi-layer coils.

Material Versatility

Compatible with specialty wires like shape-memory alloys.

High Efficiency

50-200 coils per minute production speed.

Surface Integrity

Non-cutting process preserves wire properties.

How They Work

Wire feeds through guides onto mandrel, with CNC-controlled rollers forming helical structures according to programmed parameters.

Key Characteristics

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Diameter Range - Standard 0.1-20mm, up to 50mm with special equipment

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Pitch Control - Minimum pitch 0.8x wire diameter

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Concentricity - ≤0.02mm radial runout on premium machines

Key Design Factors

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Springback Compensation – 0.5-3% overwind based on material modulus

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Winding Tension – Maintain 5-15% of wire's tensile strength

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Mandrel Design – 0.1-1° taper for release, HRC60+ surface hardness

Manufacturing Process

Wire Prep

Select straightened wire of required diameter/material.

Straightening

Multi-roller system achieves ≤0.1mm/m straightness.

Feeding

Servo-controlled with ±0.005mm accuracy.

Primary Winding

CNC rollers create basic helix.

Pitch Forming

Spacing wheels regulate coil separation.

End Forming

Laser cutting/mechanical clamping finishes ends.

Annealing

300-500℃ stress relief in controlled atmosphere.

Inspection

100% automated optical dimension check.