In smartphone camera module manufacturing (VCM - Voice Coil Motor), the suspension spring is a critical component governing micron-level focusing alignment. A Tier-1 Korean smartphone electronics manufacturer faced severe production bottlenecks when stamping $0.03\text{mm}$ ultra-thin springs. Following precision etching and blanking, the metallic springs suffered spontaneous localized curling (the "potato-chip" distortion), causing extensive assembly failure rates. The client required an ultra-thin stainless strip with hard-temper properties (≥550HV) paired with absolute zero residual stress alignment.

1. The Technical Bottleneck: Residual Stress and Post-Blanking Distortion

The 1.4310 (EN 10151 / SUS301-CSP-EH) alloy is a metastable austenitic stainless steel that relies on intensive cold-reduction ratios to achieve ultra-high tensile thresholds via strain-induced martensitic transformation.

However, standard multi-roll rolling operations introduce directional, non-homogeneous Secondary Residual Stresses across the strip profile. When the client blanks or etches the 0.03mm strip into delicate micro-spring architectures, this internal stress balance is instantly ruptured, unleashing permanent warp. This micro-distortion routinely causes high-speed auto-feeders to jammed, plunging overall line cycle rates.

2. ALLOWORD's Metallurgy: Dual-Action Stress Alleviation Protocol

To overcome this performance failure, ALLOWORD engineered a precision flat-rolled production sequence tailored strictly to the client's mechanical limits:

Micro-Work Roll Gauge Reduction: Utilizing specialized ultra-small diameter work rolls on our 20-high cold rolling mill, we delivered micro-deformation steps per pass. This synchronized cold-work schedule distributed the strain-induced martensite evenly across the 0.03mm cross-section, locking the hardness uniformly at 560-580 HV.

Precision Tension Leveling & Stress Relief: Post-rolling, the strip went through ALLOWORD's specialized tension leveling lines. Under tight elongation parameters and multi-axis small-radius reverse bending, all vector-oriented internal residual stresses were micro-countered and neutralized. Transverse gauge variation was choked to ≤±1μm, achieving a pure, absolute flat state.

3. Technical Deliverables and TCO Payback

ALLOWORD's optimized 1.4310 ultra-thin hard-temper precision strip yielded phenomenal operational metrics upon deployment on the Korean automated line:

Zero Post-Forming Distortion: Micro-spring profiles maintained near-perfect flatness tolerances post-blanking, completely eliminating the "potato-chip" warp. Final assembly yields of the VCM modules surged from 78% to a flawless 99.4%.

Unleashed Stamping Cycle Rates: With perfectly flat stock and zero elastic springback, the automated press line successfully accelerated its stamping cycle rate by 35% (Max SPM) without tracking errors, completely eliminating post-blanking secondary adjustments.

Transport packaging method

For different products, we tailor various packaging options to match different transportation environments, ensuring that each delivery arrives promptly and safely.

Expanded sheet metal processing capabilities

We can offer you more customized processing for your production, such as slitting, leveling, and more. If needed, we can also provide technical support and process services for heat treatment.