Hemming is a core forming process for automotive exterior panels. It gradually folds and presses the flange of a door outer panel inward by 180° using a roller to wrap and firmly join the inner panel. Its core characteristics include attractive joining, excellent sealing, no welding spots, and high flexibility. After hemming, the panel surface is free of welding spots, protrusions, and gaps, with a smooth and refined appearance that perfectly meets the high-end design requirements of new energy vehicles. The folded joint provides outstanding sealing, effectively improving the waterproof, dustproof, and sound insulation performance of doors and hoods. The process produces no thermal deformation or stress concentration, ensuring dimensional accuracy and structural stability. Robot hemming adapts to complex curved and profiled panels, with far greater flexibility than traditional press hemming, making it the mainstream process for manufacturing exterior panels of new energy vehicles.

In new energy vehicle manufacturing, hemming is a critical process for exterior panels that directly determines the overall look and feel of the vehicle.

• Core four doors and two covers: Doors, hoods, and trunk lids are key exterior components. Hemming ensures a firm join between outer and inner panels with a seamless, clean appearance, while enhancing rigidity and sealing, reducing wind noise, and improving NVH performance.

• NEV-specific panels: Profiled parts such as charging port covers and battery pack protection covers benefit from robot hemming’s flexible adaptation to complex contours, enabling precise folding and ensuring consistent appearance and assembly accuracy.

• High-end customized panels: For personalized panels on premium NEVs, hemming quickly adapts to custom profiles, supporting small‑batch, high‑quality production and helping brands build a high-end image.

Flexible automated production is the core advantage of Eunice’s robot hemming technology, supporting multi‑model, collinear production in the NEV industry. The system is built around a 6‑axis industrial robot + intelligent hemming head, paired with flexible fixtures and quick-change modules to achieve high flexibility.

• Multi-model collinear adaptation: Different models and panels can be handled simply by switching software programs, without changing large tooling. Changeover time is ≤ 10 minutes, solving the poor flexibility and high changeover cost of traditional press hemming.

• Precise hemming on complex surfaces: The robot’s flexible motion path adapts to profiled and complex curved panels, with hemming accuracy of ±0.1 mm, ensuring uniform folding and a smooth surface.

• Multi-process integration: The robot can switch between hemming head and glue applicator to integrate adhesive application and hemming, reducing processes and improving efficiency.

• Stable, high-quality output: Full closed-loop control of hemming pressure, path, and speed avoids defects such as over‑pressing, under‑pressing, and wrinkling, achieving a hemming pass rate above 99.9%.

Eunice delivers a flexible, intelligent hemming solution built on process expertise, quick changeover, and quality enhancement.

• Process expertise: The core team has more than 10 years of R&D experience in hemming, with deep mastery of parameter optimization for pressure, path, and speed. Customized process plans are developed for panels of different materials and thicknesses to ensure stable hemming quality and refined appearance.

• Quick changeover: Software programs combined with modular tooling enable one‑click switching between hemming programs for different models, greatly shortening line setup time and improving productivity to match the fast iteration and multi‑variety collinear production needs of NEVs.

• Quality improvement value: Eunice’s hemming solution helps customers enhance the exterior refinement and sealing performance of panels, reduce cosmetic defects and after-sales costs, while improving overall body rigidity and NVH performance, strengthening product market competitiveness and supporting the development of high-end NEV brands.

Elegant wrapping shapes appearance; seamless forming builds quality. With its flexible, high-precision, high-quality process characteristics, Eunice’s robot hemming technology has become a core pillar in the manufacturing of NEV exterior panels. From refined door hemming to seamless trunk lid wrapping, from improved appearance to optimized sealing, Eunice shapes the sophisticated look of new energy vehicles with professional craftsmanship and empowers brand quality upgrading. In the future, the company will continue to iterate robot hemming technology, integrating AI intelligent control and flexible manufacturing to provide smarter, more efficient, and higher-quality solutions for NEV exterior panel production. Every new energy vehicle will achieve a naturally elegant appearance, while refined craftsmanship boosts brand competitiveness.