SUNS SANSUN WZW-600ZF 600 kN Bidirectional Reinforcing Bar Bending Tester

Overview

The SUNS SANSUN WZW-600ZF is a horizontally configured, high-capacity bidirectional reinforcing bar bending tester engineered for precise mechanical evaluation of steel reinforcement in accordance with international standards including ISO 15630-1, ASTM A996/A996M, and GB/T 1499.2–2018. It implements a dual-cylinder hydraulic actuation system to deliver controlled, repeatable forward (180°) and reverse (20°) bending cycles on deformed steel bars—critical for assessing ductility, cold bend performance, and compliance with structural concrete specifications. The machine operates on the principle of three-point bending under static loading, where the specimen is supported at two fixed span points and subjected to concentrated displacement-controlled force via a central bending mandrel. Its monolithic frame architecture ensures minimal deflection during peak load application (up to 600 kN), preserving measurement integrity across extended test campaigns in QC laboratories and third-party certification facilities.

Key Features

• High-resolution force measurement with 1/500,000 full-scale resolution enables detection of subtle yield transitions and post-yield behavior in high-strength rebars (HRB400, HRB500).
• Continuously adjustable support span (250–580 mm) accommodates standardized test geometries for diverse bar diameters without mechanical reconfiguration.
• Dual independent hydraulic cylinders allow synchronized or sequential actuation for forward and reverse bending phases, minimizing cycle time and operator intervention.
• Integrated safety interlocks and full-enclosure guarding comply with ISO 13857 and EN 954-1 requirements for operator protection during high-force deformation events.
• LCD-based local control panel supports standalone operation with pre-programmed test sequences; optional PC integration enables full traceability per FDA 21 CFR Part 11 and GLP/GMP audit requirements.
• Modular mandrel kit includes over 40 certified bend diameters (Φ24–Φ320 mm), each calibrated and documented to meet ISO/IEC 17025 metrological traceability standards.

Sample Compatibility & Compliance

The WZW-600ZF is validated for testing hot-rolled deformed steel bars conforming to HRB400 and HRB500 strength classes, covering nominal diameters from φ6 mm to φ40 mm. Each mandrel set is dimensionally matched to specified bend diameter ratios (e.g., 4d for HRB400 forward bend, 6d for HRB500 reverse bend) as defined in ISO 15630-1 Annex A and GB/T 1499.2 Clause 8.3. The system supports batch testing protocols: up to three specimens ≤φ28 mm or two specimens φ32–φ40 mm simultaneously—reducing throughput time while maintaining individual load-path isolation. All mechanical components—including load train, pivot bearings, and mandrel alignment fixtures—are manufactured to ISO 2768-mK general tolerances and subject to annual calibration verification per ISO/IEC 17025.

Software & Data Management

The SUNS TestMaster™ control software (optional upgrade) provides closed-loop displacement and load regulation with real-time waveform capture at up to 1 kHz sampling rate. Test data—including applied force, piston displacement, bend angle, and time stamps—is stored in ASCII CSV and XML formats compliant with ASTM E1434. Audit trails record user logins, parameter changes, calibration events, and test execution metadata—fully satisfying FDA 21 CFR Part 11 electronic signature and retention requirements. Export modules support direct integration into LIMS platforms via ODBC and HL7 interfaces. Raw data files include embedded instrument ID, firmware version, and environmental condition tags (ambient temperature/humidity logged via optional external sensor input).

Applications

• Quality conformance testing of reinforcing steel supplied to infrastructure projects (bridges, high-rises, nuclear containment structures).
• Material qualification for seismic-resistant construction per ASCE 7-22 and Eurocode 8 Annex C.
• R&D validation of new microalloyed rebar formulations under cyclic bending fatigue protocols.
• Third-party certification testing accredited to ISO/IEC 17025 by national metrology institutes.
• Educational use in civil engineering laboratories for hands-on demonstration of ductile failure modes and plastic hinge formation.

FAQ

Does the WZW-600ZF comply with ISO 15630-1 for reinforcing steel testing?

Yes—the machine’s geometry, force resolution, angular accuracy, and mandrel calibration procedures are fully aligned with ISO 15630-1:2020 Annex A requirements for forward and reverse bending tests.
Can test data be exported to external QA systems?

Yes—CSV, XML, and PDF reports are exportable; optional LIMS integration supports ODBC and HL7 protocols.
Is hydraulic oil temperature monitoring included?

Standard configuration includes oil temperature and pressure sensors with alarm thresholds configurable in the control interface.
What maintenance intervals are recommended for the hydraulic system?

Oil filtration and replacement every 2,000 operating hours; annual recalibration of load cell and displacement transducers is advised.
Are calibration certificates provided with mandrel sets?

Each mandrel set ships with an ISO/IEC 17025-accredited dimensional calibration certificate traceable to NIM (China National Institute of Metrology).