Tuofeng TFW-31 Dual-Column Microcomputer-Controlled Electronic Universal Testing Machine
| Brand | Tuofeng |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Product Category | Domestic |
| Model | TFW-31 |
| Instrument Type | Electronic Universal Testing Machine |
| Max Test Load | 31 kN (derived from model nomenclature |
| 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, constant resolution |
| Drive System | Imported servo motor with precision worm-gear reducer |
| Lead Screw | High-precision preloaded ball screw |
| Effective Test Width | 400 mm (customizable up to 600 mm) |
| 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 transducer, accuracy ±0.005% of reading |
| Safety Protection | Dual electronic limit switches, emergency stop button, overload protection (>110% FS), automatic return after test |
| Crosshead Control | Dual-speed (fast/slow) motorized vertical adjustment with jog function |
| Software | Windows-based, multi-language (English/Chinese), compliant with ASTM E4, ISO 7500-1, GB/T 16491-2008, JJG 475-2008, and supports GLP/GMP audit trail configuration |
Overview
The Tuofeng TFW-31 is a dual-column, microcomputer-controlled electronic universal testing machine engineered for high-fidelity mechanical property characterization of elastomers, polymers, composites, metals, and advanced materials. Based on the principle of controlled axial force application via servo-driven electromechanical actuation, it delivers traceable, repeatable, and standards-compliant tensile, compression, flexural, shear, tear, peel, and puncture testing. Its rigid frame architecture, coupled with high-resolution load measurement (1:500,000 internal resolution) and sub-micron displacement tracking, ensures metrological integrity across low-force rubber elasticity studies and high-load structural component validation. Designed for laboratories requiring regulatory-grade data integrity, the system meets fundamental requirements of ISO 7500-1 (Class 0.5), ASTM E4 (verification of force-measuring systems), and GB/T 16491-2008 (Chinese national standard for electronic UTM design and calibration).
Key Features
- Dual-column steel frame with preloaded high-precision ball screws and imported servo drive system for minimal backlash and thermal drift.
- Constant-resolution force measurement over full 0.2–100% FS range—no auto-ranging artifacts—enabling seamless transition from low-force rubber elongation (e.g., 1–50 N) to high-load composite failure (up to 31 kN).
- Programmable control modes: constant rate of extension (CRE), constant load, constant strain, dwell (load/strain hold), and cyclic loading protocols.
- Integrated safety architecture: hardware-based dual-limit switches, emergency stop circuitry, real-time overload detection (>110% FS), and automatic crosshead return post-test.
- Motorized crosshead with independent fast/slow speed control and jog functionality for precise specimen alignment and fixture setup.
- Modular extensometry support: compatibility with clip-on axial extensometers (for modulus and yield determination) and non-contact video extensometers (optional upgrade) for strain mapping without contact interference.
Sample Compatibility & Compliance
The TFW-31 accommodates standardized and custom specimens per ASTM D412 (rubber tensile), ASTM D638 (plastics), ISO 37 (vulcanized rubber), ISO 527 (polymer tensile), GB/T 528 (Chinese rubber standard), and EN 1461 (metal coating adhesion). Fixture adaptability includes pneumatic wedge grips, roller grips for films, peel fixtures (90°/180°), bend supports (ASTM D790), and puncture platens. The system is fully compliant with calibration and verification procedures outlined in JJG 475-2008 (Chinese verification regulation for electronic UTMs) and supports documentation traceability required under ISO/IEC 17025-accredited testing laboratories. Optional 21 CFR Part 11-compliant software modules enable electronic signatures, audit trails, and user-access controls for regulated environments.
Software & Data Management
The Windows-native testing software provides full configurability for method development, execution, and reporting. It supports multi-language UI (English, Simplified/Traditional Chinese), unit conversion (N/kN/lbf, mm/in, MPa/psi), and dynamic real-time plotting of up to four simultaneous axes (e.g., stress–strain, load–time, displacement–time). Built-in calculation modules automatically derive ASTM/ISO-compliant parameters—including tensile strength, elongation at break, Young’s modulus, yield point, tear strength (ASTM D624), peel adhesion (ASTM D903), and compression set (ISO 815)—using user-defined gauge length and cross-sectional area. Data export is supported in CSV, Excel, and PDF formats; batch analysis enables statistical comparison (max/min/mean) across datasets. All test files are timestamped and checksum-verified; optional database integration allows centralized storage and version-controlled method libraries.
Applications
- Rubber & Elastomer R&D: Characterization of natural/synthetic rubber compounds, silicone elastomers, thermoplastic vulcanizates (TPVs), and TPEs—measuring stress relaxation, hysteresis, Mullins effect, and permanent set.
- Automotive Component Validation: Tensile testing of hoses, seals, gaskets, airbag fabrics, and vibration-damping mounts under ambient and elevated temperature conditions (with environmental chamber integration).
- Polymer & Composite Quality Control: Routine QC of injection-molded parts, extruded profiles, fiber-reinforced laminates, and adhesive bonds per ISO 1133, ASTM D3039, and EN 2562.
- Medical Device Materials: Mechanical evaluation of catheter tubing, balloon materials, wound dressings, and biodegradable sutures in accordance with ISO 10993-12 and USP .
- Academic & Certification Labs: Teaching labs, accreditation bodies (CNAS, UKAS), and third-party testing services performing accredited tests to ISO/IEC 17025 scope.
FAQ
What standards does the TFW-31 support out-of-the-box?
The system includes pre-configured test methods for ASTM D412, D638, D790, D624, ISO 37, 527, 7500-1, GB/T 528, and GB/T 16491-2008. Custom method templates can be built for other standards.
Can the machine perform cyclic fatigue testing?
Yes—the software supports programmable sinusoidal, triangular, and trapezoidal waveforms with user-defined frequency, amplitude, and cycle count. Load/displacement control is maintained throughout each cycle.
Is the system compatible with environmental chambers?
Yes—standard electrical and data interfaces (RS-232, Ethernet, analog I/O) allow seamless integration with temperature/humidity chambers (−70°C to +300°C) and vacuum enclosures.
What level of data security and audit readiness is provided?
With optional 21 CFR Part 11 module, the system delivers role-based access control, electronic signatures, immutable audit trails, and automated backup—fully aligned with FDA, EMA, and NMPA regulatory expectations.
Does Tuofeng offer calibration certification and traceability?
Yes—each unit ships with a factory calibration certificate traceable to NIM (National Institute of Metrology, China) or equivalent national metrology institute, with optional UKAS/DAkkS-accredited calibration available upon request.
