Tuofeng TFW-73 Single-Column Electromechanical Universal Testing Machine
| Brand | Tuofeng |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Instrument Type | Electromechanical Universal Testing Machine |
| Model | TFW-73 |
| Force Capacity Range | 5–200 kN (configurable) |
| Accuracy Class | ISO 7500-1 / ASTM E4 Grade 0.5 |
| Compliance | GB/T 16491–2008, JJG 475–2008, ISO 6892-1, ASTM E8/E9/E21/E111, EN 10002-1 |
| Control System | PC-based Closed-loop Servo Control with Real-time Data Acquisition |
| Drive System | Imported AC Servo Motor + Precision Planetary Gear Reducer |
| Actuation | High-Accuracy Preloaded Ball Screw Assembly |
| Test Speed Range | 0.001–500 mm/min (infinitely variable, no gear shifting) |
| Effective Crosshead Travel | 800 mm (extendable) |
| Maximum Test Width | 400–600 mm (customizable) |
| Load Cell Resolution | 1 part in 500,000 full scale, dual-range auto-zeroing |
| Load Measurement Uncertainty | ±0.005% of reading |
| Displacement Measurement | Optical Encoder, Accuracy ±0.005% of reading |
| Strain Measurement Options | Clip-on Extensometers (ASTM E83 Class B1/B2), Video Extensometry (optional), Large-Deformation Digital Extensometer |
| Safety Systems | Dual-channel electronic limit switches, emergency stop circuit, overload protection (>110% FS), mechanical crash barrier |
| Software | Multi-language (EN/CN/TC), CFR 21 Part 11–ready audit trail, GLP/GMP-compliant reporting, customizable test methods, curve overlay & statistical analysis |
Overview
The Tuofeng TFW-73 is a single-space, dual-column electromechanical universal testing machine engineered for high-precision static mechanical property characterization of metallic, polymeric, composite, and ceramic materials. Built upon a rigid, preloaded frame architecture with optimized load path geometry, it implements closed-loop servo control to deliver traceable force and displacement measurement across its full operational range. The system operates on the fundamental principle of axial force application through a precision ball screw-driven crosshead, enabling controlled uniaxial loading under programmable stress-, strain-, or displacement-controlled conditions. Its design conforms to international metrological standards including ISO 7500-1 (force calibration), ISO 5893 (displacement verification), and ASTM E4 (load cell verification), ensuring data integrity for regulatory submissions, inter-laboratory comparisons, and quality assurance workflows.
Key Features
- High-stiffness, low-deflection structural frame with reinforced base and crosshead assembly to minimize parasitic bending moments during high-load compression tests.
- Imported AC servo motor coupled with a planetary gear reducer and preloaded ground ball screw — delivering smooth, backlash-free motion and exceptional positional repeatability (±0.005 mm).
- Integrated dual-channel safety architecture: hardware-level electronic limits, independent emergency stop circuitry, and software-enforced overload cutoff at 110% of full-scale capacity.
- Real-time, multi-axis data acquisition at up to 1 kHz sampling rate, supporting synchronized capture of load, displacement, and extensometer-derived strain signals.
- Modular load cell configuration with automatic range recognition and temperature-compensated analog signal conditioning to maintain ±0.005% linearity and hysteresis performance.
- Quick-change crosshead positioning system with dual-speed (coarse/fine) motorized adjustment and programmable return-to-start functionality.
Sample Compatibility & Compliance
The TFW-73 accommodates standardized and custom specimens per ISO 6892-1 (tensile), ISO 14577 (instrumented indentation), ASTM D638/D790/D695 (plastics), ASTM E8/E9 (metals), and EN 10002-1 (metallic tensile testing). It supports a wide array of fixture types — including wedge-action grips, pneumatic clamps, bend fixtures, shear adapters, peel testers, and environmental chamber interfaces (up to 200 °C, optional). All mechanical and electrical subsystems comply with CE machinery directive (2006/42/EC), EMC directive (2014/30/EU), and RoHS 2011/65/EU. Calibration documentation includes as-delivered uncertainty budgets traceable to NIM (China National Institute of Metrology) or UKAS-accredited reference standards.
Software & Data Management
The proprietary Windows-based TestMaster™ software provides full CFR 21 Part 11 compliance with electronic signatures, role-based access control, immutable audit trails, and automated calibration log generation. Users define test methods using intuitive drag-and-drop sequencing for ramp-hold-step profiles, cyclic loading, creep/stress relaxation, and multi-stage protocols. Real-time visualization includes synchronized plots of force–time, stress–strain, displacement–time, and custom derivative channels (e.g., modulus vs. strain). Data export supports CSV, XML, PDF, and ASTM E1432-compliant test report formats. Raw data files are stored in encrypted binary containers with SHA-256 checksum validation; all modifications are timestamped and user-attributed. Remote diagnostics and firmware updates are supported via secure TLS 1.2 channel.
Applications
The TFW-73 serves as a primary mechanical characterization platform in R&D laboratories, QC/QA departments, and third-party certification bodies. Typical use cases include: tensile strength and elongation-at-break evaluation of thermoplastic extrusions (ISO 527); compressive yield behavior of aluminum alloys (ASTM E9); flexural modulus determination of fiber-reinforced composites (ASTM D790); adhesion strength quantification of pressure-sensitive tapes (ASTM D3330); and fracture toughness assessment of sintered ceramics (ISO 20501). In automotive Tier-1 supply chains, it validates weld joint integrity per SAE J1169; in medical device manufacturing, it verifies tensile properties of nitinol stent wire per ASTM F2516. Its modular design allows integration with digital image correlation (DIC) systems and acoustic emission sensors for advanced failure mode analysis.
FAQ
Does the TFW-73 support ASTM E23 for Charpy impact testing?
No — the TFW-73 is a quasi-static electromechanical tester and does not perform dynamic impact testing. Charpy/V-notch impact requires a pendulum-type impact tester (e.g., ASTM E23-compliant instrumented drop-weight system).
Can the system be validated for ISO/IEC 17025 accreditation?
Yes — full validation documentation (IQ/OQ/PQ protocols), uncertainty budgets, and metrological traceability records are provided for laboratory accreditation under ISO/IEC 17025:2017 Clause 6.4 and 6.5.
Is third-party calibration included with purchase?
Factory calibration is performed prior to shipment using NIST-traceable deadweight standards and certified reference materials. On-site calibration by an accredited provider (e.g., A2LA or CNAS) is available as an optional service.
What extensometer options are compatible with the TFW-73?
Standard configurations include ASTM E83 Class B1 clip-on extensometers (10–50 mm gauge length) and large-deformation video extensometers with sub-pixel resolution. Custom gauge lengths and high-temperature variants (up to 1000 °C) are available upon request.
How is software update and technical support handled post-purchase?
All registered units receive lifetime software updates via secure download portal. Technical support includes remote diagnostics, video-assisted troubleshooting, and on-site service contracts with SLA-defined response times (standard: 48-hour remote, 5-business-day on-site).
