Tuofeng TFW-175 Microcomputer-Controlled Electromechanical Universal Testing Machine

Overview

The Tuofeng TFW-175 Microcomputer-Controlled Electromechanical Universal Testing Machine is an ISO/IEC 17025-aligned static mechanical testing system engineered for high-fidelity tensile, compressive, flexural, shear, tear, peel, and puncture characterization of metallic, polymeric, composite, ceramic, and elastomeric materials. It operates on the principle of controlled displacement actuation via a precision ball-screw-driven crosshead, coupled with real-time force feedback from a high-stability load cell and synchronized position tracking via optical encoder. Designed in strict accordance with GB/T 16491–2008 (equivalent to ISO 7500-1:2018 and ASTM E4–23) and verified per JJG 475–2008 metrological verification protocol, the TFW-175 delivers Class 0.5 accuracy across its full 20 kN capacity—meeting the repeatability and traceability requirements for GLP-compliant quality control labs, R&D departments, and third-party certification bodies.

Key Features

• Class 0.5 force measurement accuracy (±0.005% of reading) validated per ISO 7500-1, ensuring compliance with ASTM E4, ISO 37, ISO 527, and EN 10002-1 test standards.
• Single-range, high-resolution load cell (1:500,000 internal resolution, no range switching) eliminates zero drift and hysteresis errors common in multi-range systems.
• Imported servo motor + worm gear reducer provides ultra-low-speed stability down to 0.001 mm/min and smooth acceleration profiles critical for creep and relaxation testing.
• Dual-speed motorized crosshead (jog/fast/slow modes) enables rapid setup and precise positioning—reducing operator intervention and cycle time variability.
• Integrated triple-protection architecture: hardware-based electronic limit switches, software-defined overload cutoff (110% FS), and redundant emergency stop circuitry compliant with IEC 61800-5-2 functional safety guidelines.
• Modular fixture interface supports standardized wedge-action grips, compression platens, bend fixtures, peel bars, and custom tooling per ASTM D638, D790, D1876, D3330, and ISO 11339 specifications.

Sample Compatibility & Compliance

The TFW-175 accommodates specimens ranging from thin polymer films (≥0.05 mm thick) to structural metal coupons (up to 25 mm thickness), composites (CFRP/GFRP laminates), rubber compounds, adhesives, textiles, and biomedical polymers. Its 400 mm standard test width (expandable to 600 mm) and 800 mm vertical stroke support ASTM-standard dog-bone, dumbbell, and rectangular geometries—including ISO 527 Type 1A, ASTM D638 Type I–V, and ISO 6892-1 gauge lengths. All mechanical calibrations are traceable to national standards (CNAS-accredited reference laboratories), and system validation includes linearity, repeatability, and creep tests per ISO 7500-1 Annex B. The machine satisfies mandatory requirements for CE marking (EMC Directive 2014/30/EU, Machinery Directive 2006/42/EC) and 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

Tuofeng’s Windows-based TFM-TestSuite v4.2 offers full GxP-aligned data integrity: role-based user access control, electronic signatures, immutable audit trails, and 21 CFR Part 11–compatible metadata logging (user ID, timestamp, parameter changes, calibration events). The software supports seven test modes—constant rate of extension (CRE), constant load, constant strain, hold-to-load, hold-to-strain, cyclic loading, and stress-relaxation—with real-time plotting of up to four simultaneous curves (e.g., stress–strain, load–displacement, strain–time). Units are freely convertible (N/kN/lbf, MPa/psi, mm/in, %), and multilingual UI (English, Simplified/Traditional Chinese) ensures global lab interoperability. Raw data exports to CSV, Excel, and XML; reports comply with ISO 14289-1 (PDF/A-1b) archival standards. Custom test method templates can be imported/exported, and API hooks allow integration with LIMS (e.g., LabWare, Thermo SampleManager) and MES platforms.

Applications

• Mechanical property certification of aerospace aluminum alloys (e.g., 2024-T3, 7075-T6) per AMS 4027 and ASTM B557.
• Quality assurance of automotive thermoplastics (PP, PA66-GF30) per ISO 527-2 and SAE J2112.
• Adhesion strength evaluation of pressure-sensitive tapes (ASTM D3330) and structural adhesives (ISO 4587).
• Biomechanical testing of orthopedic polymer implants (UHMWPE, PEEK) per ISO 5834-2 and ASTM F2003.
• Creep behavior analysis of geosynthetic clay liners (GCLs) under sustained load per ASTM D5889.
• Fracture toughness pre-cracking and R-curve determination using clip-gauge extensometry (ASTM E576, E1820).

FAQ

What international standards does the TFW-175 support out-of-the-box?
The system includes pre-configured test methods for ASTM D638, D790, D1876, ISO 6892-1, ISO 527-2, ISO 178, and GB/T 1040. Additional standards can be loaded via method import or custom scripting.
Is the load cell calibrated and certified prior to shipment?
Yes—each unit ships with a factory calibration certificate traceable to NIM (National Institute of Metrology, China) and includes a CNAS-accredited verification report valid for 12 months.
Can the TFW-175 perform closed-loop strain control using an extensometer?
Yes—when equipped with the optional high-precision video extensometer or clip-on axial extensometer (50 mm gauge length, ±0.5 µm resolution), the system executes true closed-loop strain-rate control per ISO 6892-1 Annex G.
Does the software meet regulatory requirements for pharmaceutical or medical device testing?
With optional 21 CFR Part 11 add-on module (electronic signatures, audit trail, data encryption), the TFM-TestSuite achieves ALCOA+ compliance and supports FDA inspection readiness.
What maintenance intervals are recommended for long-term accuracy retention?
Load cell and encoder verification every 6 months; ball screw lubrication and mechanical alignment check annually; full metrological recalibration every 12 months by an accredited service provider.