Hengyi HY-500N·m High-Strength Bolt Torque and Friction Coefficient Testing Machine
| Brand | Hengyi |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Model | HY-500N·m |
| Max Torque | 500 N·m |
| Torque Measurement Range | 0.5–500 N·m |
| Torque Resolution | 1/50000 |
| Torsion Angle Measurement Range | 10000° |
| Motor Power | 5 kW |
Overview
The Hengyi HY-500N·m High-Strength Bolt Torque and Friction Coefficient Testing Machine is an electromechanical torsion testing system engineered for precision evaluation of mechanical fasteners under controlled preload and rotational loading. It operates on the principle of simultaneous dual-sensor measurement—capturing axial clamping force (via integrated load cell) and torsional torque (via high-fidelity torque transducer) while resolving angular displacement with optical encoder feedback. This architecture enables traceable, real-time acquisition of torque-angle curves and derivation of critical fastener performance parameters including total coefficient of friction (µtot), thread friction coefficient (µth), bearing surface friction coefficient (µb), yield clamping force, proof torque, and ultimate failure characteristics. Designed specifically for high-strength bolt assemblies used in structural steelwork, wind turbine towers, rail infrastructure, and heavy machinery, the system complies with fundamental mechanics-of-fasteners test paradigms defined in ISO 16047 and GB/T 16823.3.
Key Features
- High-resolution torque measurement with 1/50,000 resolution and ±0.5% full-scale accuracy across the 0.5–500 N·m range
- Optically encoded angular position sensing with 10,000° maximum measurable rotation and ±0.5% angular accuracy
- Dual-closed-loop control architecture: torque-controlled and angle-controlled test modes with programmable ramp profiles
- Low-noise, brushless AC servo motor drive (5 kW) enabling stable low-speed operation (down to 0.1 rpm) without stick-slip or creep
- Modular jaw system accommodating standard fastener sizes from M10 to M30; custom fixtures available for non-standard geometries
- Rigid C-frame construction with 1000 mm adjustable test zone clearance and 1800 kg operational mass ensuring minimal frame compliance during high-torque events
- Integrated safety interlocks, emergency stop circuitry, and overload protection compliant with IEC 61800-5-1 functional safety requirements
Sample Compatibility & Compliance
The HY-500N·m system is validated for testing a broad spectrum of threaded fasteners including but not limited to: ASTM A325/A490 high-strength structural bolts, EN 14399 preloaded assemblies, ISO 898-1 grade 10.9 and 12.9 bolts, wind turbine tower anchor bolts, shear-type twist-off bolts, stud bolts, double-end studs, and specialized weld studs. All test methodologies align with internationally recognized standards: ISO 16047 (determination of torque coefficients and friction properties), GB/T 16823.3–2010 (equivalent to ISO 16047), GB/T 3098.9–2002 (mechanical properties of fasteners — torque-clamp force testing), EN 14399-1:2005 and EN 14399-3–6:2006 (preloaded assemblies for slip-resistant joints). The system supports GLP-compliant data recording and meets foundational requirements for audit readiness per ISO/IEC 17025 calibration traceability frameworks.
Software & Data Management
The HYtest control and analysis software suite provides modular, Windows-based operation with role-based user access control. It supports fully customizable test templates—including multi-step sequences (e.g., run-up to target torque, dwell, stepwise angular increment, yield detection, failure capture). Raw sensor data (torque, axial force, angle, time) are logged at ≥1 kHz sampling rate and stored in encrypted binary format with embedded metadata (operator ID, sample ID, environmental conditions, calibration stamps). Export options include CSV, PDF reports with annotated torque-angle plots, and XML for LIMS integration. Audit trail functionality records all parameter modifications, test executions, and report generations with timestamped user attribution—supporting basic FDA 21 CFR Part 11 readiness when deployed in regulated QA/QC environments.
Applications
- Verification of lubricant efficacy and consistency across batch production of coated or oiled fasteners
- Development and validation of new surface treatments (e.g., zinc flake, phosphate, PTFE dry film)
- Quality conformance testing per procurement specifications for OEMs in construction, energy, and transportation sectors
- Root cause analysis of joint loosening or premature fracture in field-failed assemblies
- Calibration and verification of torque tools used in assembly lines (indirect traceability via reference fastener characterization)
- Research into tribological behavior of novel thread geometries and material pairings (e.g., stainless-steel-on-titanium, ceramic-coated interfaces)
FAQ
What standards does the HY-500N·m machine directly support?
It natively implements test protocols aligned with ISO 16047, GB/T 16823.3–2010, GB/T 3098.9–2002, and EN 14399 series standards.
Can the system measure axial force simultaneously with torque?
Yes—integrated high-accuracy load cell enables concurrent measurement of clamping force and applied torque with synchronized time-stamping.
Is the software compatible with laboratory information management systems (LIMS)?
Raw data export in CSV and structured XML formats allows seamless ingestion into third-party LIMS platforms.
What is the typical calibration interval recommended for metrological traceability?
Annual calibration against NIST-traceable torque and force standards is recommended; certificate documentation includes as-found/as-left data per ISO/IEC 17025 requirements.
Does the system support automated pass/fail evaluation based on user-defined limits?
Yes—threshold-based logic rules can be configured within test templates to trigger visual alerts, data flagging, or hardware interlocks upon deviation from specification limits.
