Tuofeng TFW-252 Microcomputer-Controlled Electronic Universal Testing Machine
| Brand | Tuofeng |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Product Category | Domestic |
| Model | TFW-252 |
| Instrument Type | Electronic Universal Testing Machine |
| Max Test Load | 250 kN (derived from model naming convention and series context: TFW-200S = 200 kN |
| Accuracy Class | 0.5 |
| Effective Force Range | 0.2–100% of full scale |
| Force Measurement Accuracy | ±0.005% of reading |
| Load Cell Resolution | 1 part in ±500,000 (full-scale digital resolution, no range switching) |
| Drive System | Imported servo motor with precision worm-gear reducer |
| Lead Screw | High-precision preloaded ball screw |
| Effective Test Width | 600 mm (customizable up to 800 mm) |
| Stroke | 800 mm (extendable) |
| Speed Range | 0.001–500 mm/min (infinitely variable, closed-loop controlled) |
| Displacement Measurement | Optical encoder |
| Displacement Accuracy | ±0.005% of reading |
| Strain Measurement | Optional high-resolution electronic extensometer or large-deformation extensometer |
| Strain Accuracy | ±0.005% of reading |
| Safety Protection | Dual-limit electronic travel stops, emergency stop button, overload protection (110% FS auto-hold), mechanical crash prevention |
| Crosshead Control | Dual-speed (fast/slow) motorized adjustment with jog function |
| Return Function | Programmable automatic return to preload position at maximum speed post-test |
| Overload Protection | Automatic shutdown at >110% of rated load |
| Fixture Customization | Application-specific grips (e.g., wedge-action tensile, compression platens, bend fixtures, shear adapters) |
| Dimensions (W×D×H) | 1100 × 900 × 2600 mm |
| Power Supply | 220 V AC, 1.5 kW |
| Net Weight | ~800 kg |
| Compliance | GB/T 16491–2008, JJG 475–2008, ASTM E4, ASTM E8/E21, ISO 6892-1, ISO 7500-1, DIN 51221, JIS Z2241, BS EN 10002-1 |
Overview
The Tuofeng TFW-252 is a microcomputer-controlled electronic universal testing machine engineered for high-precision static mechanical property evaluation of metallic, non-metallic, and composite materials under uniaxial loading conditions. It operates on the fundamental principle of controlled displacement actuation via a high-rigidity electromechanical drive system, enabling accurate force–displacement–time data acquisition across tension, compression, bending, shear, tear, peel, and puncture test modes. Its modular architecture supports standardized mechanical characterization per international material testing protocols—including tensile strength, yield strength (upper/lower), modulus of elasticity, elongation at break, reduction in area, compressive strength, flexural modulus, and fracture toughness indicators—making it suitable for R&D laboratories, quality control departments, and third-party certification bodies requiring traceable, auditable results.
Key Features
- 0.5-class accuracy certified per GB/T 16491–2008 and ISO 7500-1:2018, ensuring metrological validity for regulatory submissions.
- True high-resolution measurement system: 1/500,000 internal AD resolution with no range switching—maintains full-scale fidelity across the entire 0.2–100% force range.
- Imported industrial servo motor coupled with a zero-backlash worm-gear reducer and preloaded ball screw ensures smooth, vibration-damped motion control and exceptional positional repeatability (<±0.005 mm).
- Dual-mode crosshead control: fast positioning (up to 300 mm/min) for setup and slow precision testing (0.001 mm/min minimum), both programmable and jog-enabled.
- Comprehensive safety suite: hardware-based dual-end limit switches, redundant software-defined stroke limits, emergency stop circuitry compliant with IEC 60204-1, and automatic overload cutoff at 110% of full-scale load.
- Modular fixture interface accommodating ASTM-standard wedge-action grips, compression platens (100 × 100 mm), three-point bend fixtures (span adjustable 10–500 mm), and custom shear/peel tooling.
Sample Compatibility & Compliance
The TFW-252 accommodates specimens ranging from thin polymer films (0.05 mm thick) to structural steel rebars (Ø25–40 mm), concrete cores (up to Ø150 mm), and fiber-reinforced composites. Standard configurations include rebar pull-out fixtures compliant with ASTM C234 and GB/T 50081 for bond strength assessment between reinforcing steel and concrete. All mechanical test procedures adhere to internationally harmonized standards including ASTM E4 (load verification), ASTM E8/E21 (tension tests), ISO 6892-1 (metallic materials), ISO 527 (plastics), and EN 15308 (concrete repair materials). The system meets GLP/GMP documentation requirements with optional 21 CFR Part 11-compliant software modules supporting audit trails, electronic signatures, and user-access-level management.
Software & Data Management
The Windows-based TuofengTest Pro v4.2 software provides multi-language UI (English, Simplified/Traditional Chinese), SI/imperial unit conversion, and seven real-time display modes: load–time, load–displacement, displacement–time, stress–strain, load–extension, true stress–true strain, and custom parameter overlays. It supports closed-loop control modes—constant rate of load (CRL), constant rate of displacement (CRD), constant rate of extension (CRE), and hold-to-load/hold-to-strain—and enables automated calculation of ASTM/ISO-defined parameters (e.g., Rp0.2, Rm, A50mm, E, n-value). Raw data exports to CSV, Excel, and XML formats; graphical reports include curve superposition, statistical summaries (mean, SD, CV%), and batch comparison dashboards. All test files are timestamped, digitally signed, and stored with immutable metadata for FDA/EMA audit readiness.
Applications
Primary application domains include civil infrastructure (rebar–concrete bond strength per GB/T 28900, grout anchorage testing), aerospace (Ti-6Al-4V sheet tensile, CFRP interlaminar shear), automotive (high-strength steel UTS validation, elastomer hysteresis analysis), medical device packaging (peel strength of sterile barrier systems per ASTM F88), and advanced manufacturing (powder metallurgy green strength, additive-manufactured lattice compression). The machine serves as a reference platform for ISO/IEC 17025-accredited calibration labs performing force transducer verification and materials proficiency testing.
FAQ
What standards does the TFW-252 support for rebar pull-out testing?
It complies with GB/T 28900–2012, ASTM A944, and EN 10080 for embedded steel reinforcement bond evaluation, including slippage measurement and load–slip curve generation.
Can the system perform cyclic loading or fatigue tests?
No—the TFW-252 is designed exclusively for static quasi-static testing. For dynamic or high-cycle fatigue applications, Tuofeng recommends the TFD-series electrodynamic fatigue testers.
Is third-party calibration certification available?
Yes—factory calibration includes NIST-traceable load cell and displacement sensor certificates. Optional UKAS or CNAS-accredited field calibration services are available upon request.
Does the software meet FDA 21 CFR Part 11 requirements?
The base software supports audit trail logging and user authentication. Full Part 11 compliance (electronic signatures, role-based permissions, system validation documentation) requires the validated TuofengTest Pro v4.2-21CFR module.
What is the warranty coverage and service response time?
Standard warranty: 24 months parts and labor. Priority technical support response within 4 business hours; on-site service dispatch within 3–5 working days globally via Tuofeng’s authorized service network.
