Guigang Mining Machinery Closed-Die Forging Case, Guangxi

This case study presents a closed-die forging solution delivered by Jianing Forging for a heavy equipment manufacturer in Guangxi. The client required high-strength components for a mining machinery application, where reliability and dimensional consistency are critical under extreme operational loads.

Client Challenge

The client faced multiple issues with their previous forging supplier: inconsistent material density led to premature part failure, long lead times disrupted production schedules, and the cost of rework from dimensional deviations added significant overhead. Additionally, the complex geometry of the part made it difficult to achieve uniform grain flow with conventional forging methods.

Our Solution

Jianing Forging applied a tailored closed-die forging process using finite element analysis to optimize the die design and material flow. The solution included:

• Custom die set machined from H13 tool steel with controlled heat treatment to ensure repeatable geometry.
• Precisely heated billets at 1200°C with controlled cooling to achieve a fine-grained microstructure.
• Post-forging heat treatment (normalizing and tempering) to achieve the required mechanical properties.
• 100% dimensional inspection using coordinate measuring machines (CMM) to guarantee tolerances within ±0.5 mm.

The result was a 30% improvement in fatigue life, zero rework in the first production lot, and a 15% reduction in overall cost per part compared to the previous supplier. Delivery time was also reduced by 20% through optimized process scheduling.