Tuofeng TFW-211 Microcomputer-Controlled Electronic Universal Testing Machine
| Brand | Tuofeng |
|---|---|
| Model | TFW-211 |
| Type | Electromechanical Universal Testing Machine |
| Max. Test Load | 200 kN |
| Accuracy Class | 0.5 |
| Effective Force Range | 0.2–100% of Full Scale |
| Force Measurement Accuracy | ±0.005% of Reading |
| Resolution | 1/±500,000 Full Scale (Fixed, No Range Switching) |
| Drive System | Imported Servo Motor + Precision Worm Gear Reducer |
| Lead Screw | High-Accuracy Ball Screw |
| Effective Test Width | 600 mm (Customizable) |
| Stroke | 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 Gauge |
| Strain Accuracy | ±0.005% of Reading |
| Safety Protection | Electronic Limit Switches, Emergency Stop, Overload Cutoff (10% above rated load) |
| Crosshead Control | Dual-Speed (Fast/Slow) Motorized Adjustment with Return-to-Start Function |
| Power Supply | 220 V, 3.0 kW |
| Dimensions (L×W×H) | 1100×900×2600 mm |
| Weight | ~1500 kg |
| Compliance | GB/T 16491–2008, JJG 475–2008, ASTM E4, ASTM E8, ISO 6892-1, ISO 7500-1, DIN 51221, JIS Z 2241, BS EN 10002-1 |
Overview
The Tuofeng TFW-211 is a high-precision, microcomputer-controlled electromechanical universal testing machine engineered for static mechanical property evaluation of metallic wires, prestressed steel strands, structural alloys, polymers, composites, and advanced engineering materials. It operates on the principle of controlled axial force application via a servo-driven ball-screw actuation system, enabling accurate measurement of tensile, compressive, flexural, shear, tear, peel, and puncture responses under standardized loading conditions. Designed specifically for high-strength wire rope and prestressed concrete reinforcement applications—including 7-wire steel strands (e.g., ASTM A416 Grade 270), galvanized strand, and epoxy-coated tendons—the TFW-211 delivers traceable, repeatable results across full-scale load ranges up to 200 kN. Its rigid four-column frame, zero-backlash transmission, and real-time closed-loop control architecture ensure minimal compliance error and high fidelity in stress–strain curve acquisition—critical for determining yield plateau behavior, ultimate tensile strength (UTS), uniform elongation, total elongation at break, modulus of elasticity, and proof load verification per international pre-stressing standards.
Key Features
- 0.5-class accuracy certified per GB/T 16491–2008 and ISO 7500-1:2018, validated by national metrological institutes
- Full-range force resolution of 1 part in ±500,000 without range switching—enabling seamless transition from low-force preload to maximum 200 kN test without recalibration
- Dual-speed motorized crosshead with programmable return-to-origin function and emergency stop circuit compliant with IEC 61800-5-2 safety standards
- Integrated overload protection triggering at 110% of rated capacity, coupled with hardware-based electronic limit switches and mechanical buffer stops
- Modular extensometry support: compatible with clip-on axial extensometers (ASTM E83 Class B-1) and non-contact video extensometers for strain mapping
- High-rigidity 600 mm test width frame with customizable jaw configurations—including wedge-action hydraulic grips for steel strand anchoring and serrated flat-face grips for sheet specimens
Sample Compatibility & Compliance
The TFW-211 accommodates standardized steel strand specimens (e.g., Φ12.7 mm, Φ15.2 mm, Φ15.7 mm) per ASTM A416/A416M, ISO 6934-4, and GB/T 5224, as well as reinforced concrete dowels, anchor assemblies, and grouted tendon systems. It supports multi-point grip alignment verification and axial load centering per ISO 204 and ASTM E1012 to minimize bending moment artifacts. The system meets regulatory requirements for GLP-compliant material certification workflows and supports audit-ready documentation aligned with FDA 21 CFR Part 11 (electronic records/signatures) when paired with optional software validation packages. All mechanical and electrical subsystems comply with CE marking directives (2006/42/EC Machinery Directive, 2014/30/EU EMC Directive) and RoHS 2011/65/EU.
Software & Data Management
Tuofeng’s proprietary TensilePro v5.2 testing software runs natively on Windows 10/11 and supports multilingual UI (English, Simplified/Traditional Chinese, Spanish, German). It enables user-defined test protocols—including constant-rate-of-traverse (CRT), constant-rate-of-load (CRL), load-hold, displacement-hold, and cyclic ramp-hold sequences—as specified in ASTM D638, ISO 527-1, and EN 10002-1. Real-time plotting includes synchronized force–displacement, stress–strain, and time-based parameter overlays. Data export conforms to ASTM E1434 (ASCII tab-delimited) and ISO/IEC 17025 traceability formats. Automated report generation includes specimen ID, environmental conditions, calibration certificates, raw data archives, and statistical summaries (mean, SD, CV%) for batch testing. Software updates are delivered remotely with version-controlled change logs and IQ/OQ documentation support.
Applications
- Tensile characterization of post-tensioning steel strands in bridge and high-rise construction projects
- Proof load verification of anchorages and couplers per ACI 408R and PTI M44.1
- Mechanical qualification of stainless steel cables used in façade systems and suspension structures
- Quality assurance testing of cold-drawn wire rods and drawn-and-heat-treated strand products
- Research-grade stress relaxation and creep behavior analysis under sustained loading (with optional load-hold modules)
- Validation of composite tendon performance under combined tension–corrosion exposure per ASTM G150
FAQ
What standards does the TFW-211 support for steel strand testing?
It fully complies with ASTM A416, ISO 6934-4, GB/T 5224, EN 10138-3, and JIS G3536 for tensile strength, elongation, and modulus determination.
Can the system perform automatic yield point detection per ASTM E8?
Yes—TensilePro v5.2 implements both offset method (0.2% strain offset) and upper/lower yield identification algorithms per ASTM E8 Annex A3.
Is third-party calibration and certification available?
Tuofeng provides factory calibration with NIST-traceable load cells and offers optional on-site verification by CNAS-accredited laboratories.
Does the machine support integration with LIMS or MES platforms?
Via OPC UA and TCP/IP APIs, the system exports structured JSON/XML test records compatible with major laboratory informatics systems.
What maintenance intervals are recommended for long-term accuracy retention?
Biannual verification of force and displacement transducers is advised; annual mechanical inspection of lead screw preload and gear backlash is included in the service contract.
