Automotive BIW Welding Engineering

CEI specializes in the design and manufacturing of high-precision Body-in-White (BIW) welding systems, delivering flexible and automated production solutions for automotive manufacturers. Our expertise covers main assembly lines, floor lines, bodyside lines, door production lines, and sub-assembly systems, ensuring seamless integration of welding processes with maximum efficiency. Leveraging cutting-edge technologies such as robotic vision systems, laser welding, and online inspection, we enhance production accuracy while reducing cycle times. Additionally, CEI excels in advanced joining techniques for new energy lightweight materials, including FDS (Flow Drill Screwing), RSW (Resistance Spot Welding), and SPR (Self-Piercing Riveting), making us a trusted partner for both traditional and electric vehicle production.

Innovative Welding Technologies for Next-Generation Manufacturing

At the core of CEI’s BIW welding solutions is our ability to integrate smart automation and Industry 4.0 technologies into production lines. Our robot vision-guided systems ensure precise component alignment and defect detection, while laser welding enables high-strength, low-distortion joins for critical structural components. We also incorporate real-time quality monitoring through in-line inspection systems, reducing rework and improving overall product consistency. Whether for high-volume passenger vehicles or specialized commercial trucks, our welding systems are designed for scalability, flexibility, and future-ready adaptability, supporting hybrid production models that accommodate multiple vehicle platforms.

Turnkey BIW Welding Line Solutions for Global Automotive Manufacturers

CEI provides end-to-end turnkey BIW welding line projects, from initial concept design to full-scale production implementation. Our engineering team collaborates closely with clients to optimize layout planning, process flow, and equipment selection, ensuring cost-efficiency and minimal downtime during deployment. We also specialize in retrofitting and upgrading existing welding lines to enhance capacity, incorporate new joining technologies, or transition to lightweight material strategies for electric vehicles. With a strong focus on lean manufacturing and energy-efficient automation, CEI’s BIW welding solutions help automotive OEMs and Tier 1 suppliers achieve higher productivity, superior weld quality, and reduced operational costs.

By combining advanced welding techniques, smart automation, and deep industry expertise, CEI empowers automotive manufacturers to build lighter, stronger, and more efficient vehicle bodies while maintaining the highest standards of precision and reliability. Whether for ICE (internal combustion engine) vehicles or next-gen EVs, our BIW welding engineering solutions drive innovation at every stage of production.

Nanjing MAZDA factory 

• Project Name: Under body
• PLC system: Mitsubishi 
• Robot brand: FANUC 116 pcs
• Car type: J90A
• Main equipment: Floor line +UB line + MB line  +MF