The core reason for torque testing of damping hinges is to ensure user experience, guarantee product lifespan, and meet design specifications. This can be specifically expanded from the following aspects:
1. Ensuring Opening/Closing Feel and User Experience
The core function of damping hinges is to provide appropriate resistance, ensuring that screens, covers, and other components don't suddenly drop when opening or closing, nor are difficult to push.
Too much torque → Users feel "tight," operation is laborious, and shell or hinge damage may occur.
Too little torque → Screen cannot hold position, automatically slides down, poor experience.
Torque testing ensures each batch of products provides consistent, comfortable feel.
2. Verifying Design Compliance
Hinge torque values are key parameters set during the design phase (e.g., 0.8±0.1 N·m).
Testing can determine whether actual production deviates from design targets, promptly identifying issues such as mold wear, lubricant failure, and cumulative part tolerance problems.
3. Ensuring Lifespan and Reliability
Damping hinges typically need to withstand tens of thousands of open/close cycles (e.g., laptop hinges ≥25,000 times).
If initial torque is unreasonable (too high or too low), it will accelerate internal component wear or plastic housing cracking.
Torque testing can screen out early failure products, avoiding after-sales issues.
4. Meeting Industry or Customer Standards
Many industries (such as laptops, automotive, medical) have clear torque testing standards for hinges:
GB/T 10077-2017 (Chinese laptop hinge standard)
Requirement: Initial torque within specified range, aging test decay no more than ±20%.
5. Consistency Control and Batch Tracing
Hinge torque is affected by multiple factors including lubricant amount, spring clip deformation, and friction plate wear.
Through 100% online testing or sampling inspection, we can:
- Reject defective products
- Trace which batch, machine, or lubricant bottle caused problems
✅ Summary in one sentence:
Torque testing is not about "conformance to standards," but about "consistency" and "reliability" - ensuring every damping hinge provides stable, comfortable, and safe damping experience throughout its entire lifecycle.
