Tuofeng TFW-21 Dual-Column Computer-Controlled Electromechanical Universal Testing Machine
| Brand | Tuofeng |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Instrument Type | Electromechanical Universal Testing Machine |
| Model | TFW-21 |
| Force Capacity | 20 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 codes (single-range, no switching) |
| Drive System | Imported servo motor with worm-gear reducer |
| Lead Screw | High-precision preloaded ball screw |
| Effective Test Width | 600 mm (customizable) |
| Max. Travel | 800 mm (extendable) |
| Speed Range | 0.001–500 mm/min (infinitely variable) |
| Displacement Measurement | Optical encoder |
| Displacement Accuracy | ±0.005% of reading |
| Strain Measurement | Optional extensometer or large-deformation transducer |
| Safety Systems | Electronic limit switches, emergency stop button, overload protection (110% FS auto-shutdown) |
| Crosshead Control | Dual-speed motorized up/down with jog function |
| Return Mode | Automatic high-speed return post-test |
| Fixture Customization | Application-specific grips and fixtures available |
| Compliance | GB/T 16491–2008, JJG 475–2008, ASTM E4, ASTM E8, ISO 6892-1, ISO 7500-1, DIN 51221, JIS Z2241 |
Overview
The Tuofeng TFW-21 is a dual-column, microprocessor-controlled electromechanical universal testing machine engineered for high-accuracy static mechanical property evaluation of metallic, polymeric, composite, and elastomeric materials. Based on the principle of controlled displacement actuation via precision ball-screw-driven crosshead movement and real-time load feedback from a high-stability load cell, the system delivers traceable, repeatable force-displacement data under standardized tensile, compression, flexural, shear, tear, peel, and puncture conditions. Designed to meet international metrological requirements for materials certification and R&D validation, the TFW-21 conforms to ISO 7500-1 (Class 0.5), ASTM E4 (load verification), and ASTM E8/E8M (tensile testing of metals), supporting full compliance workflows for GLP, GMP, and ISO/IEC 17025-accredited laboratories.
Key Features
- Dual-column rigid frame architecture with preloaded high-precision ball screws ensuring minimal axial deflection and long-term dimensional stability.
- Imported servo motor coupled with a low-backlash worm-gear reducer enables ultra-low-speed control down to 0.001 mm/min and smooth high-speed returns at up to 500 mm/min.
- Single-range, high-resolution load measurement system (1:500,000 internal resolution) with no range switching—maintains consistent accuracy across 0.2–100% of full scale (20 kN).
- Integrated electronic safety interlocks: programmable upper/lower travel limits, hardware-based emergency stop, and automatic over-load cutoff at 110% of rated capacity.
- Motorized crosshead with dual-speed jog control allows precise specimen alignment and rapid repositioning without manual intervention.
- Modular fixture interface supports standardized wedge-action grips, pneumatic clamps, bending jigs, peel fixtures, and custom-engineered tooling per ASTM D638, ISO 527, ASTM D3039, and ISO 178 protocols.
Sample Compatibility & Compliance
The TFW-21 accommodates specimens ranging from fine-diameter wires (e.g., copper conductors per IEC 60228, ASTM B33) to structural composites and reinforced polymers. Its 600 mm test width and 800 mm vertical stroke enable evaluation of full-size cable assemblies, insulation jackets, and multi-layer laminates. The system is validated against national and international standards including GB/T 16491–2008 (Chinese specification for electronic UTM), JJG 475–2008 (verification regulation), ASTM D882 (thin plastic films), ASTM D1445 (wire rope), ISO 6892-1 (tensile testing at ambient temperature), and ISO 1133 (melt flow index correlation). All calibration certificates are NIST-traceable, and the machine supports audit-ready documentation for FDA 21 CFR Part 11–compliant environments when paired with optional electronic signature and audit trail modules.
Software & Data Management
The Windows-based Tuofeng TestSuite v5.2 provides ISO/IEC 17025-aligned test configuration, execution, and reporting. It supports multiple control modes—including constant rate of extension (CRE), constant load ramping, hold-to-strain, and cyclic loading—and displays synchronized real-time plots of load vs. displacement, stress vs. strain, and extension vs. time. Units are freely convertible between SI, imperial, and legacy systems (e.g., MPa/kpsi, mm/in, N/lbf). Raw data is stored in ASCII CSV and proprietary binary formats with embedded metadata (operator ID, timestamp, standard reference, environmental conditions). The software enables curve overlay comparison across batches, statistical summary (mean, SD, CV%), automated pass/fail flagging against user-defined limits, and PDF/Excel report generation with embedded graphs and calibration history. A dedicated API interface allows integration with LIMS and MES platforms.
Applications
The TFW-21 serves as a primary mechanical characterization platform across regulated and industrial sectors. In wire and cable manufacturing, it quantifies tensile strength, elongation-at-break, and yield behavior of stranded copper/aluminum conductors, PVC/XLPE insulation layers, and armored sheaths per UL 1581 and EN 50363. In aerospace composites labs, it performs ASTM D3039-compliant tensile tests on carbon fiber laminates and interlaminar shear strength (ILSS) per ASTM D2344. Automotive suppliers use it for rubber bushing compression set, brake pad shear resistance, and gasket sealing force profiling. Academic users apply it to biomaterials (sutures, hydrogels), additive-manufactured alloys, and nanocomposite films where sub-0.1% strain resolution and thermal drift compensation are critical. Its modularity supports ASTM D6252 (geotextile puncture), ISO 1184 (plastic film tear), and ISO 8510-2 (adhesive peel) configurations.
FAQ
What standards does the TFW-21 support out-of-the-box?
It natively implements test methods per ASTM E8, ASTM D638, ISO 6892-1, ISO 527, GB/T 228.1, and JIS Z2241—with parameter templates, calculation routines, and report layouts pre-configured.
Can the system be integrated into an existing laboratory network?
Yes—TestSuite v5.2 offers OPC UA and TCP/IP interfaces for bidirectional communication with SCADA, MES, and LIMS systems; optional 21 CFR Part 11 compliance packages include role-based access control and electronic audit trails.
Is extensometer compatibility included in the base configuration?
A clip-on axial extensometer (50 mm gauge length, ±1% accuracy) is available as an optional add-on; large-deformation video extensometry is supported via third-party SDK integration.
What maintenance intervals are recommended for long-term accuracy?
Annual verification per ISO 7500-1 is advised; load cell recalibration every 12 months and mechanical inspection (ball screw lubrication, guide rail cleaning) every 6 months ensure sustained 0.5-class performance.
Does the machine support multi-step cyclic testing?
Yes—the software enables fully programmable waveforms including sine, triangle, trapezoidal, and user-defined step sequences with dwell periods, peak load control, and hysteresis loop analysis.
