Tuofeng TFW-206 Screen-Displayed Steel Strand Tensile Testing Machine
| Brand | Tuofeng |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Instrument Type | Electromechanical Universal Testing Machine |
| Model | TFW-206 |
| Compliance | GB/T 16491–2008, JJG 475–2008 |
| Accuracy Class | 0.5 |
| Effective Force Range | 0.2%–100% of Full Scale |
| Load Measurement Accuracy | ±0.005% of reading |
| Force Resolution | 1/±500,000 codes (full-scale, no range switching) |
| Drive System | Imported servo motor with worm gear reducer |
| Lead Screw | High-precision preloaded ball screw |
| Effective Test Width | 400 mm (customizable up to 600 mm) |
| Max Stroke | 800 mm (extendable) |
| Speed Range | 0.001–500 mm/min (infinitely variable) |
| Displacement Measurement | Optical encoder, accuracy ±0.005% of reading |
| Strain Measurement | Optional extensometer or large-deformation sensor, accuracy ±0.005% of reading |
| Safety Protection | Electronic limit switches, emergency stop button, overload protection (>110% F.S.), automatic return function |
| Control Mode | Constant load, constant displacement, constant strain, hold load/displacement |
| Software | Multi-language (EN/CN-Traditional/CN-Simplified), real-time curve display (F-t, F-δ, δ-t, σ-ε, F-ΔL), auto-calculation of tensile strength, yield strength, elongation, modulus of elasticity, compressive strength, shear strength, tear strength, peel strength, adhesion strength, etc. |
Overview
The Tuofeng TFW-206 Screen-Displayed Steel Strand Tensile Testing Machine is an electromechanical universal testing system engineered for high-precision static mechanical characterization of structural materials under uniaxial loading conditions. Designed specifically for prestressed concrete applications, it meets the stringent metrological and operational requirements for testing high-strength steel strands (e.g., ASTM A416, GB/T 5224), including ultimate tensile strength, yield force, total elongation at maximum force (Agt), modulus of elasticity, and stress relaxation behavior under controlled displacement or load control. Its rigid frame architecture—featuring a preloaded ball screw transmission system, imported servo drive, and dual-speed automated crosshead positioning—ensures minimal compliance, high repeatability (<0.5% RSD across repeated tests), and long-term stability in both laboratory and industrial QA/QC environments. The machine operates fully compliant with national and international standards including GB/T 16491–2008 (Chinese standard for electronic UTM), JJG 475–2008 (verification regulation), ASTM E4, ISO 7500-1, and EN 10002-1.
Key Features
- Integrated high-resolution color LCD screen with intuitive menu navigation—enabling standalone operation without external PC connection for basic test execution and real-time parameter monitoring.
- 0.5-class accuracy certified force measurement system with ±0.005% reading uncertainty and 1/500,000 internal resolution—ensuring traceable, reproducible results across the full 200 kN capacity range.
- True dual-range displacement sensing: optical encoder for macro-movement (±0.005% accuracy) + optional clip-on or non-contact extensometer for micro-strain measurement (compliant with ISO 9513 Class 1).
- Programmable multi-step test sequences—including ramp-hold-ramp profiles, cyclic loading (tension-compression), and creep/relaxation protocols—with user-defined dwell times and slope limits.
- Robust mechanical safety architecture: triple-redundant protection (electronic limit switches, hardware emergency stop, software-based overload cutoff at 110% F.S.) plus automatic return-to-initial-position post-test.
- Modular fixture interface supporting standardized wedge-type grips for steel strand clamping (up to Φ15.24 mm), compression platens, bending jigs, and custom adapters per ASTM E8/E21, ISO 6892-1, and GB/T 228.1.
Sample Compatibility & Compliance
The TFW-206 accommodates a broad spectrum of specimen geometries and material classes, with primary application focus on prestressing steel (single wires, 7-wire strands, indented strands), structural reinforcing bars (deformed and plain), and high-performance alloys used in bridge cables and post-tensioning systems. It also supports testing of metallic foils, polymer composites, geotextiles, and rubber compounds when equipped with appropriate fixtures and extensometry. All test routines adhere to regulatory frameworks governing construction materials certification—including GB 50010 (China Concrete Code), EN 10138 (Prestressing Steels), ASTM A416/A421, and ISO 6934-4. Data integrity is maintained through audit-trail-enabled software compliant with GLP principles; raw data files include timestamped metadata, operator ID, calibration certificate references, and environmental condition logging (optional temperature/humidity input).
Software & Data Management
The embedded Windows-based testing software provides full IEC 62304-compliant control logic and data acquisition architecture. It supports eight simultaneous real-time plotting channels (force-time, stress-strain, displacement-load, etc.), customizable pass/fail criteria per test step, and automated report generation in PDF/XLS formats compliant with ISO/IEC 17025 documentation requirements. All test parameters—including crosshead speed, preload thresholds, yield point detection algorithms (0.2% offset, tangent, or automatic inflection), and fracture recognition logic—are configurable via password-protected administrator mode. Raw binary data (.tdms) and processed result sets (.csv) are stored with SHA-256 hash verification for forensic traceability. The system includes built-in support for FDA 21 CFR Part 11 compliance modules (electronic signatures, role-based access control, change history logs), available as optional licensed add-ons for regulated laboratories.
Applications
- Quality assurance of prestressed concrete components: verification of strand tensile properties prior to casting and post-installation acceptance testing.
- R&D validation of new alloy formulations for improved ductility, fatigue resistance, and corrosion performance in aggressive environments.
- Third-party certification testing per CNAS-accredited scopes for construction material suppliers and inspection agencies.
- Educational use in civil engineering labs for hands-on instruction on stress-strain behavior, necking phenomena, and fracture mechanics fundamentals.
- Process optimization studies in wire drawing plants—correlating reduction ratios and heat treatment parameters with final mechanical performance.
- Failure analysis investigations involving brittle fracture, hydrogen embrittlement, or stress corrosion cracking in high-strength steels.
FAQ
What standards does the TFW-206 support out-of-the-box?
It natively implements GB/T 228.1, GB/T 16825.1, ASTM E8, ISO 6892-1, and EN ISO 6892-1 test methods, with preloaded templates for tensile, compression, and bend configurations.
Can the system be integrated into a LIMS or MES environment?
Yes—the software exposes OPC UA and RESTful API endpoints for bidirectional data exchange with enterprise lab information management systems and manufacturing execution platforms.
Is remote calibration and diagnostics supported?
Field calibration verification is enabled via encrypted cloud-synced calibration certificates; remote technical support includes screen-sharing, firmware updates, and diagnostic log analysis via secure TLS tunnel.
Does the machine meet CE or UKCA marking requirements?
While designed to comply with essential safety requirements of the Machinery Directive 2006/42/EC, CE/UKCA conformity requires site-specific risk assessment and Notified Body involvement—Tuofeng provides full technical documentation packages to facilitate this process.
What is the warranty coverage and service response time?
Standard warranty is 24 months parts-and-labor; priority on-site service response is guaranteed within 72 business hours for Tier-1 customers under extended support agreements.
