Hot Stamping Dies for Body Structural Parts

Hot Stamped Rocker Panel Reinforcement

The rocker panel (also called side sill) is the structural member running along the bottom of the body side between the front and rear wheel openings. Hebei Haoxinran Machinery produces hot stamped rocker reinforcements that strengthen this critical area for side impact, pole impact, and small overlap crash performance.

Rocker Panel Importance

The rocker panel is a key load path in several crash scenarios:

• Side Impact: The rocker panel absorbs and distributes side impact forces before they reach the occupant compartment. It works with the B-pillar and floor crossmembers to protect occupants.

• Pole Impact: In oblique pole impacts, the rocker must resist localized penetration and spread the load over a wider area.

• Small Overlap Frontal: In small overlap frontal crashes, the rocker panel helps route crash loads around the occupant compartment into the floor structure.

• Jacking and Lift: The rocker provides reinforced jacking points and supports vehicle lift during service.

Hot Stamped Rocker Design

Our hot stamped rocker reinforcements are designed for maximum energy absorption and intrusion resistance:

• Closed Section Integration: The reinforcement fits inside the rocker panel inner and outer panels, creating a multi-cell box section with high bending strength.

• Crush Initiator Features: Controlled ridges and valleys promote progressive crushing rather than catastrophic failure during impact.

• Length Optimization: Reinforcement extends the full length of the rocker to distribute loads across multiple connection points.

• Lightweight Construction: Ultra-high strength steel allows thinner material while meeting load requirements.

Performance Benefits

Adding hot stamped rocker reinforcement provides:

• Reduced side intrusion in pole impact and moving deformable barrier tests

• Improved small overlap crash performance by strengthening the load path

• Better match with B-pillar and floor crossmember stiffness for coordinated crash response

• Minimal weight penalty for significant safety improvement

Haoxinran works with OEMs and Tier 1 suppliers to develop rocker panel reinforcements that integrate with existing body structures while meeting program-specific crash performance and weight targets.