Zongda spring production floor

MANUFACTURING & QUALITY

Manufacturing Built for
Repeatable Quality.

From material to final release, we control every step to deliver consistent, high-performance springs for global customers.

18,000 m2Manufacturing Facility
130+Machines
1.8MPieces per Month
3Certified Systems

REAL PRODUCTION ROUTE

From steel strip to a controlled spring

The route changes with material and product design. Conditional steps are identified rather than presented as a single fixed line.

Ten-step Zongda spring production route from steel strip to packing
  1. 01Steel Strip
  2. 02Edge Finishing
  3. 03Heat TreatmentNot required for SUS301, SK5 or SAE1078
  4. 04Cutting
  5. 05Annealing
  6. 06Hook Forming
  7. 07First WindingSome products finish here
  8. 08Setting
  9. 09Second Winding
  10. 10Packing

OUR FACTORY CAPABILITIES

Precision equipment for consistent results

A well-equipped facility and experienced team ensure stable production and flexible response to customer needs.

DISCUSS YOUR PROJECT

QUALITY CONTROL

Checks built into the production route

Quality control begins with the requirement and continues through material, setup, forming and final release.

  • Incoming MaterialGrade, condition and dimensional verification
  • First ArticleGeometry and functional confirmation before scale-up
  • In-process ControlDefined checkpoints during forming and conditioning
  • Functional TestingTorque, working turns and performance as required
  • Final ReleaseInspection records, identification and packing control
Zongda quality inspection workbench
Dimensional inspection
Spring torque testing equipment
Torque and functional testing

CERTIFIED MANAGEMENT SYSTEMS

A safer, greener and more reliable operation

Internationally recognized systems support consistent quality, environmental responsibility and a safe working environment.

START WITH THE REQUIREMENT

Need a process built around your spring?

Share the material, strip dimensions, torque, working turns, installation space and target life.

TALK TO OUR ENGINEERING TEAM