Tuofeng TFW-273 Electro-Hydraulic Servo Universal Testing Machine with Digital Display

Overview

The Tuofeng TFW-273 Electro-Hydraulic Servo Universal Testing Machine is an industrial-grade static mechanical testing system engineered for high-precision tensile, compression, bending, and shear characterization of metallic and high-strength non-metallic materials. Its four-column, dual-screw, cylinder-down structural architecture ensures exceptional rigidity and minimal deflection under load—critical for maintaining measurement fidelity across the full force range. The machine operates on a closed-loop electro-hydraulic servo principle: a high-response servo valve modulates pressurized hydraulic oil flow into the actuator cylinder based on real-time feedback from load cells and displacement transducers. This enables precise control of test parameters—including constant stress rate, constant strain rate, or constant crosshead speed—in strict compliance with ISO 6892-1, ASTM E8/E21, GB/T 228.1–2021, and EN 10002-1. The integrated digital display interface provides immediate visibility of real-time load, displacement, strain, and test stage status—eliminating dependency on external PCs during routine operation while retaining full data logging capability.

Key Features

• Three-loop closed-loop control architecture supporting simultaneous or sequential stress-, strain-, and displacement-controlled testing modes with seamless, impact-free mode transitions
• High-fidelity load measurement using precision S-type or column-type load cells calibrated to ≤ ±1% indication error, with resolution down to 1/300,000 of full-scale capacity
• Hydraulic clamping system delivering uniform, repeatable gripping force across round (Φ6–Φ40 mm) and flat (0–30 mm thickness, up to 75 mm width) specimens
• Dual-speed crosshead actuation: motor-reducer-chain-screw drive for coarse positioning; servo-hydraulic fine control for sub-micron displacement resolution
• Modular oil source unit featuring high-pressure variable displacement pump, differential pressure valve group, and multi-stage filtration (including high-efficiency particulate filter) to ensure long-term hydraulic stability and contamination resistance
• Digital front-panel display with intuitive icon-based navigation, real-time curve plotting (load vs. displacement, stress vs. strain), and on-device test parameter configuration

Sample Compatibility & Compliance

The TFW-273 accommodates standardized and custom geometries per ISO 6892-1 Annex A (tensile bars), ASTM E8 Figure 1 (flat and round coupons), and GB/T 228.1–2021 Annex B (notched and sheet specimens). Its 600 mm tensile height and 500 mm compression space support specimens up to 500 mm in length and 140 mm in bending roller width. All force and displacement transducers are traceably calibrated to national metrological standards (CNAS-accredited calibration certificates available upon request). The system meets mechanical safety requirements per ISO 12100 and electrical safety per IEC 61000-6-2/6-4. While not pre-certified for FDA 21 CFR Part 11, its software architecture supports audit trail implementation, electronic signature integration, and role-based access control—enabling GxP-aligned validation when deployed in regulated QC environments.

Software & Data Management

The included Windows-based control and analysis software operates in two modes: standalone panel-driven operation and PC-synchronized advanced testing. It supports user-defined test sequences—including multi-step ramp-hold-relax profiles—and permits import/export of test methods, specimen definitions, and pass/fail criteria in XML format. Data output follows ASTM E1392-compliant ASCII structure and is natively compatible with Excel via OLE automation. Reports are generated in customizable .xlsx templates—users define field order, units, statistical summaries (mean, SD, CV%), and graphical overlays. The system implements dual-tier user management (Administrator and Tester roles) with password protection, session logging, and modification timestamps. Raw data files are stored in binary .tdf format with embedded metadata (operator ID, timestamp, environmental conditions, calibration IDs) to satisfy GLP documentation requirements.

Applications

• Metallic material qualification per ASTM A370 (steel products), ASTM B557 (aluminum alloys), and ISO 6892-1 (room temperature tensile testing)
• Quality control of structural components including welded joints, castings, and forged parts under monotonic and cyclic loading protocols
• Validation of heat-treated material properties, including yield strength, ultimate tensile strength, elongation at break, and reduction in area
• Compression testing of concrete cylinders (ASTM C39), ceramics, and composite laminates using φ160 mm platens
• Three-point bending evaluation of beams and rails per ASTM D7264 and GB/T 232–2010, with adjustable support spans up to 300 mm
• R&D laboratories conducting comparative mechanical property studies across alloy grades, processing routes, or aging conditions

FAQ

What standards does the TFW-273 comply with for tensile testing?
It fully supports GB/T 228.1–2021, ISO 6892-1:2019, ASTM E8/E21, and EN 10002-1 through programmable control algorithms and certified transducer accuracy.
Can the system perform low-speed creep or hold tests?
Yes—the three-loop controller enables stable load or displacement holding for durations up to 999 hours with drift compensation activated.
Is hydraulic oil maintenance documented in the manual?
Yes—the operator manual includes oil type specifications (ISO VG 46 anti-wear hydraulic oil), replacement intervals (every 2000 operating hours or 2 years), and filtration monitoring procedures.
Does the machine support third-party software integration?
The system provides TCP/IP and RS232 communication interfaces with documented API commands, enabling integration with LIMS or MES platforms via custom middleware.
What is the warranty coverage and service response time?
Tuofeng offers a 24-month parts-and-labor warranty; technical support is available within 4 business hours, with on-site service dispatched within 5 working days globally (excl. remote regions).