High production capacity and strong delivery capability: Leading enterprises have an annual capacity of 50,000–80,000 tons, covering leaf springs for heavy-duty trucks, light trucks, mini trucks, buses, mining vehicles, agricultural machinery and other full categories. A single factory can support 100,000–500,000 complete vehicles simultaneously.
Multi-base layout: Enterprises such as Chongqing Hongqi and Shandong Leparde adopt a multi-production base model, covering core national markets, shortening logistics radius and ensuring emergency delivery.
Significant cost advantage: Large-scale procurement of spring steel (accounting for 60%–70% of costs) dilutes equipment and labor costs, with stronger cost-transfer capability amid raw material price fluctuations.
II. Advantages of Full-process Technology & Intelligent Manufacturing
Full-chain independent control: Closed-loop production from spring steel rolling, cutting, hot punching, eye rolling, heat treatment, shot peening, electrophoresis, assembly to testing, with no outsourcing dependence.
Leading Core Technologies
High-precision heat treatment: Vacuum high-pressure gas quenching + AI process optimization, temperature control ±5℃, residual compressive stress layer stable at 0.75–0.85mm, fatigue life over 300,000 cycles.
Shot peening strengthening: Laser-assisted shot peening, coverage ≥98%, improving fatigue strength by over 30%.
Surface treatment: Electrophoresis + DLC coating, salt spray test over 1,200 hours, greatly enhancing corrosion resistance.
Empowerment by Intelligent Manufacturing
Full-process intelligent production lines realizing one-piece flow, automation and digital production.
Integrated MES+ERP+SCADA system enables traceability of 12 key processes, increasing production efficiency by over 50% and reducing labor costs by over 40%.
Robots replace manual work in eye rolling, taper forming, end cutting, etc., with precision ±0.1mm and pass rate ≥99.5%.
