Tuofeng TFW-74 Microcomputer-Controlled Universal Testing Machine
| Brand | Tuofeng |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Product Category | Domestic |
| Model | TFW-74 |
| Instrument Type | Electromechanical Universal Testing Machine |
| Price Range | USD 7,000 – 14,000 (FOB Shanghai) |
| Structural Configuration | Dual-Column Frame |
| Compliance | GB/T 16491–2008, JJG 475–2008, ASTM E4, ISO 7500-1, DIN 51221, JIS B 7721 |
| Load Capacity | 74 kN (customizable variants up to 200 kN) |
| Force Accuracy | ±0.005% of reading |
| Force Resolution | 1/500,000 full scale, single-range, no auto-ranging |
| Load Cell Class | Class 0.5 per ISO 376 |
| Crosshead Speed Range | 0.001–500 mm/min (infinitely variable, closed-loop servo control) |
| Displacement Accuracy | ±0.005% of reading (optical encoder) |
| Extensometer Compatibility | Automatic interface for clip-on or video extensometers (ASTM E83 Class B1/B2 compliant) |
| Test Width | 400 mm (standard), expandable to 600 mm |
| Stroke | 800 mm (extendable) |
| Safety Systems | Dual-channel electronic limit switches, emergency stop circuit, overload protection at 110% of rated load |
| Drive System | Imported AC servo motor with precision worm-gear reducer |
| Transmission | Preloaded recirculating ball screw |
| Control Mode Support | Load-controlled, displacement-controlled, strain-controlled, hold (load/strain/displacement), ramp-hold sequences |
| Software Certification | FDA 21 CFR Part 11 ready (audit trail, electronic signature, user access levels) |
Overview
The Tuofeng TFW-74 Microcomputer-Controlled Universal Testing Machine is an electromechanical static testing system engineered for high-fidelity mechanical property characterization of metallic, polymeric, composite, and ceramic materials. Based on the fundamental principles of uniaxial force application under closed-loop digital servo control, the TFW-74 applies precisely regulated tensile, compressive, flexural, shear, tear, peel, and puncture loads in accordance with standardized test protocols. Its dual-column rigid frame architecture ensures minimal deflection (<0.05 mm under full load), enabling repeatable measurement of modulus, yield strength, ultimate tensile strength, elongation at break, Poisson’s ratio, and fracture energy across diverse specimen geometries. Designed for laboratory and industrial QA/QC environments, the system complies with international metrological standards including ISO 7500-1 (static calibration), ASTM E4 (verification of force-measuring systems), and GB/T 16491–2008 (Chinese national standard for universal testing machines). All structural components—including the preloaded ball screw, hardened guide rails, and reinforced crosshead—are manufactured to tight geometric tolerances to maintain alignment within ±0.02 mm over the full stroke.
Key Features
- Class 0.5 force measurement accuracy per ISO 376, verified traceably to NIM (National Institute of Metrology, China) standards
- Single-range, high-resolution load cell with 1/500,000 internal count resolution—no range switching required across 0.2%–100% of full scale
- Dual-mode motion control: independent fast (200 mm/min) and fine (0.001 mm/min) positioning for rapid setup and sub-micron displacement precision
- Integrated safety architecture: redundant electronic limit switches, hardware-based emergency stop circuit, and real-time overload cutoff at 110% of rated capacity
- Modular extensometry support: native interface for ASTM E83-compliant axial and transverse extensometers, including video-based non-contact options
- Thermally stable aluminum alloy load frame with vibration-damped base mounting points for low-noise signal acquisition
- Compliance with GLP/GMP documentation requirements via configurable audit trail, user authentication, and electronic signature modules
Sample Compatibility & Compliance
The TFW-74 accommodates specimens ranging from miniature metal coupons (ASTM E8/E21) to large-section polymer composites (ISO 527-2, ASTM D638) and rubber sheets (ISO 37, ASTM D412). Standard grips include wedge-action pneumatic clamps (for metals), serrated face platens (for compression), and peel fixtures (ASTM D903, ISO 8510-2). Optional accessories enable ISO 178 flexural testing, ASTM D1435 tear propagation, and ASTM D6252 puncture resistance. All test methods are executable under strict adherence to ISO/IEC 17025–2017 clause 7.2.2 (method validation) and ASTM E251 (strain gauge extensometer calibration). The machine’s firmware and software are validated for use in regulated environments requiring 21 CFR Part 11 compliance, supporting role-based access control, change history logging, and electronic record retention for ≥15 years.
Software & Data Management
Tuofeng’s proprietary TestMaster Pro v5.2 software operates natively on Windows 10/11 (64-bit) and supports multilingual UI (English, Simplified/Traditional Chinese, German, Japanese). It implements ISO 13384-1–compliant data acquisition at up to 10 kHz sampling rate, with real-time calculation of engineering stress–strain, true stress–strain, modulus gradients, and hysteresis loops. The software provides synchronized multi-curve display (force–time, stress–strain, displacement–time), automatic parameter extraction per ASTM D638 Annex A2, and statistical reporting (mean, SD, CV%, min/max) across batched tests. Raw data exports to .csv, .xlsx, and .tdms formats; test reports comply with ISO/IEC 17025 Annex A requirements and include instrument ID, calibration dates, operator ID, environmental conditions (optional sensor integration), and uncertainty budgets. Firmware and software updates are delivered via secure HTTPS channel with SHA-256 integrity verification.
Applications
The TFW-74 serves as a primary mechanical characterization platform in R&D labs and production QA departments across aerospace (e.g., titanium alloy tensile qualification per AMS 2304), automotive (composite bumper impact simulation per SAE J2907), medical device manufacturing (polymer suture strength per ISO 10993-12), and construction materials certification (rebar yield verification per ASTM A615). It supports advanced material development workflows including creep–rupture profiling (ASTM E139), cyclic fatigue testing (ASTM E466), and high-strain-rate response modeling (when paired with optional hydraulic burst fixture). Universities utilize the system for undergraduate mechanics labs and graduate-level fracture mechanics research, leveraging its open API for MATLAB® and Python® integration.
FAQ
What international standards does the TFW-74 comply with for force calibration and system verification?
The system meets ISO 7500-1 (Class 0.5), ASTM E4, JJG 475–2008, and GB/T 16491–2008. Certificate of Calibration includes uncertainty budget per ISO/IEC 17025.
Can the TFW-74 perform strain-controlled tests with closed-loop feedback using an external extensometer?
Yes—supports ASTM E83 Class B1/B2 extensometers via analog voltage input with <10 µs latency; strain control loop bandwidth exceeds 50 Hz.
Is the software validated for use in FDA-regulated pharmaceutical or biocompatibility testing?
TestMaster Pro v5.2 includes 21 CFR Part 11 modules (audit trail, e-signature, user roles) and is documented per GAMP5 Annex 11 for computerized system validation.
What is the maximum specimen height supported without modification?
Standard stroke is 800 mm; extended column kits increase usable height to 1200 mm while maintaining stiffness >1.2 × 10⁶ N/mm.
Does the system support automated test sequence execution for unattended operation?
Yes—batch scripting allows fully autonomous execution of multi-step protocols (e.g., preload → ramp → hold → unload → return) with pass/fail logic based on user-defined thresholds.
