Roller Hemming System

       Hemming is one of the most critical processes in automotive body manufacturing, responsible for joining outer and inner panels while preserving the visual integrity of Class-A surfaces. By folding the flange of an outer panel over an inner reinforcement panel, the process creates a structurally robust and aesthetically refined assembly suitable for modern vehicle production.

     This technology is widely applied in the manufacturing of automotive closures, including doors, hoods, deck lids, tailgates, and roof assemblies, where dimensional accuracy and surface quality are essential.

    With more than 20 years of engineering experience in closure manufacturing and over 15 successfully delivered robotic roller hemming systems, extensive expertise has been developed across a wide range of vehicle programs. This practical experience provides a solid foundation for delivering reliable and production-proven solutions for high-volume automotive manufacturing.

 

Engineering-Led Development

     Every successful hemming project begins long before tooling manufacturing starts. Comprehensive process feasibility studies and forming simulations are conducted using industry-leading software platforms including AutoForm, CATIA, and DELMIA. Through advanced digital validation, critical forming parameters are analyzed and optimized to ensure stable production performance before manufacturing activities begin.

Key engineering activities include:

• Hemming feasibility studies
• Flange design and optimization
• Hemming sequence development
• Roller path definition and validation
• Material flow analysis
• Crack and split prediction
• Wrinkle prevention analysis
• Springback compensation studies
• Cycle time optimization
• Robot accessibility and process validation

This simulation-driven methodology significantly reduces project risks while ensuring robust and repeatable manufacturing processes for both steel and aluminum closure panels.

 

From Simulation to Physical Reality

     A key differentiator lies in the direct integration of digital simulation results into physical tooling design.

Unlike conventional approaches, where robot teaching relies heavily on manual path adjustments, validated roller paths generated during the simulation phase are directly incorporated into the tooling through dedicated mechanical guidance features.

      As a result, more than 95% of the final robot trajectory can be established using predefined mechanical references during commissioning.

This engineering approach provides several important advantages:

• Significantly reduced robot teaching time
• Faster commissioning and production launch
• Reduced process tuning and adjustment efforts
• Improved process repeatability
• Consistent hemming quality across production batches
• Reduced risk of Class-A surface defects

     By bridging the gap between virtual engineering and physical manufacturing, the transition from installation to stable mass production is substantially accelerated.

 

Advanced Robotic Roller Hemming Technology

     Robotic roller hemming technology forms the foundation of the developed systems, providing the flexibility required for modern multi-model automotive production. Key capabilities include:

• Robotic roller hemming cells
• Complex closure geometries
• Multi-model production systems
• Controlled pre-hemming and final hemming operations
• High-precision robot path execution
• Steel and aluminum panel applications
• Automated process monitoring and validation

     Extensive experience has been gained in the development of hemming solutions for:

• Front Doors
• Rear Doors
• Hoods
• Deck Lids
• Tailgates
• Roof Assemblies

     This broad application knowledge enables the selection of the most effective hemming strategy for each vehicle program.

 

Integrated Design & Manufacturing Capability

     One of the major strengths of the organization is the ability to manage the entire hemming tooling lifecycle internally.

From engineering design and digital validation to machining, assembly, tryout, and commissioning, virtually all critical tooling components are designed and manufactured in-house, with only standard commercial components sourced externally.

     This high level of vertical integration provides:

• Complete engineering control
• Consistent manufacturing quality
• Faster project execution
• Reduced dependency on external suppliers
• Greater flexibility during project modifications

The result is a more reliable development process, improved quality control, and enhanced project responsiveness.

 

Manufacturing, Tryout & Commissioning

     All tooling components are manufactured using precision machining processes and verified through rigorous quality control procedures.

Engineering support extends throughout every phase of implementation, including:

• Tool assembly
• Dimensional verification
• Robot integration
• Process tryout
• Production validation
• On-site commissioning
• Launch support

Through systematic process validation and continuous optimization, stable production performance and consistent quality are achieved from the earliest stages of mass production.

 

Reliable Solutions for Modern Automotive Manufacturing

    Successful hemming requires more than tooling—it requires the integration of process engineering, digital validation, manufacturing expertise, and production experience.

      More than two decades of closure manufacturing knowledge, combined with advanced simulation technologies and proven tooling solutions, enable the delivery of hemming systems that meet the demanding requirements of modern automotive production.

     The result is a reliable, efficient, and production-ready hemming process capable of delivering the quality, precision, and consistency expected by today's automotive industry.