Pinggu Drive Closed-Die Forging Case, Beijing

In the Pinggu Drive Closed-Die Forging project based in Beijing, Jianing Forging delivered a tailored solution for a high-precision automotive drivetrain component. The client faced persistent issues with inconsistent material flow and microstructural voids during conventional forging, leading to elevated rejection rates and shortened service life of the final parts. Additionally, the existing process could not achieve the required dimensional tolerances for the complex geometry of the drive hub.

Client Challenges

The customer reported that traditional open-die methods resulted in uneven grain structure and surface defects. Post-forging machining revealed hidden cracks, causing up to 15% scrap. The need for higher fatigue resistance and tighter concentricity (within 0.05 mm) further strained their supply chain. Moreover, the production cycle was too long to meet growing market demand.

Solution Provided by Jianing Forging

Jianing Forging implemented a closed-die forging process specifically engineered for the Pinggu drive component. By optimizing the preform shape and die design, we achieved uniform material flow and eliminated internal voids. A controlled cooling regime after forging refined the grain structure, enhancing mechanical properties. The solution also incorporated a multi-stage forging sequence with in-process inspection, ensuring every part meets the specified tolerance without additional machining. This reduced the rejection rate to below 2% and shortened the delivery lead time by 30%.