Tuofeng TFW-33 Dual-Column Microcomputer-Controlled Universal Testing Machine
| Brand | Tuofeng |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Instrument Type | Electromechanical Universal Testing Machine |
| Model | TFW-33 |
| Force Capacity | 33 kN (typical configuration within TFW series) |
| Accuracy Class | 0.5 |
| Effective Force Range | 0.2–100% of full scale |
| Force Measurement Accuracy | ±0.005% of reading |
| Resolution | 1 part in ±500,000 full-scale codes (no range switching) |
| Drive System | Imported servo motor with precision worm-gear reducer |
| Lead Screw | High-accuracy preloaded ball screw |
| 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 sensor, accuracy ±0.005% of reading |
| Safety Protection | Electronic limit switches, emergency stop, overload cutoff (>110% FS), dual-speed motorized crosshead control |
| Software | Multi-language (EN/CN/TC), compliant with ASTM E4, ISO 7500-1, GB/T 16491-2008, JJG 475-2008, supports GLP audit trail, test report generation, curve overlay, and parameter auto-calculation (tensile strength, yield strength, elongation, modulus, compressive strength, peel strength, shear strength, etc.) |
Overview
The Tuofeng TFW-33 is a dual-column, microcomputer-controlled electromechanical universal testing machine engineered for high-precision static mechanical property evaluation of metallic, polymeric, composite, and ceramic materials. Based on the principle of controlled axial force application through a servo-driven ball-screw actuation system, it delivers traceable, repeatable load-displacement data under standardized quasi-static conditions (per ISO 6892-1, ASTM E8/E9, and GB/T 228.1). Its rigid frame architecture—designed to minimize deflection and thermal drift—ensures measurement integrity across the full force range (up to 33 kN nominal capacity), making it suitable for R&D laboratories, quality control departments, and third-party certification bodies requiring metrological confidence in tensile, compression, flexure, shear, peel, and tear testing.
Key Features
- Dual-column steel frame with reinforced base and crosshead, optimized for torsional and lateral rigidity (deflection < 0.02 mm/kN at mid-span)
- Imported high-torque servo motor coupled with low-backlash worm-gear reducer for smooth, silent, and backlash-free motion control
- Precision-ground preloaded ball screw (C5 grade) ensuring positional repeatability of ±0.005 mm over full stroke
- Real-time closed-loop control of load, displacement, and strain via digital PID algorithm with sampling rate ≥ 1 kHz
- Integrated safety triad: hardware-based emergency stop, programmable electronic travel limits, and automatic overload shutdown at 110% of rated capacity
- Motorized crosshead with dual-speed (fast approach / fine positioning) operation and programmable return-to-start function
- Modular fixture interface compatible with standard wedge-action grips, compression platens, bend fixtures, and custom adapters per ASTM E8M, ISO 6892-1 Annex B, and GB/T 228.1 Clause 7
Sample Compatibility & Compliance
The TFW-33 accommodates specimens ranging from miniature wires (Ø0.1 mm) to structural coupons (up to 600 mm wide × 800 mm tall). It supports standardized geometries defined in ASTM D638 (plastics), ASTM D3039 (composites), ISO 527-2 (thermoplastics), and GB/T 1040.1 (general plastics). All force and displacement transducers are calibrated traceable to NIM (National Institute of Metrology, China) and certified per ISO/IEC 17025 requirements. The system meets essential performance criteria outlined in GB/T 16491-2008 (Chinese national standard for UTM design), JJG 475-2008 (verification regulation), and international equivalents including ISO 7500-1 (class 0.5 verification) and ASTM E4 (load calibration procedures). Optional configurations support 21 CFR Part 11-compliant electronic signatures and audit trails for regulated environments.
Software & Data Management
Tuofeng TestSuite™ v5.2 is a Windows-based, multi-language (English, Simplified/Traditional Chinese) testing platform compliant with ISO/IEC 17025 documentation requirements. It enables user-defined test methods—including constant-rate-of-traverse (CRT), constant-rate-of-load (CRL), and hold-to-strain protocols—with real-time display of up to four synchronized plots (e.g., stress–strain, load–time, displacement–time). Raw data are stored in encrypted .tdb binary format with embedded metadata (operator ID, timestamp, calibration certificate ID, environmental conditions). The software auto-calculates and exports ASTM/ISO/GB-compliant parameters: ultimate tensile strength (UTS), yield strength (Rp0.2), Young’s modulus, percent elongation, reduction in area, compressive yield stress, flexural modulus, peel adhesion energy, and shear strength. Export options include CSV, PDF reports (with logo customization), and XML for LIMS integration. Audit trail logging records all parameter changes, test executions, and result modifications with user attribution and timestamps.
Applications
The TFW-33 serves as a core mechanical characterization tool across industrial and academic sectors. In aerospace, it validates fastener tensile strength (per ASTM F606), bolt preload consistency, and composite laminate interlaminar shear (ASTM D2344). Automotive suppliers use it for brake pad compression testing (SAE J211), rubber bushing hysteresis analysis, and seat belt webbing tensile endurance. In construction materials labs, it performs rebar yield verification (ASTM A615), concrete cylinder compression (ASTM C39), and geotextile grab strength (ASTM D4632). Electronics manufacturers rely on its precision for solder joint shear testing (IPC-TM-650 2.4.1) and flexible PCB peel adhesion (IPC-TM-650 2.4.9). Universities employ it for fundamental mechanics education, fracture toughness pre-cracking (ASTM E399), and biomaterials evaluation (ISO 5832-3 for titanium alloys).
FAQ
What standards does the TFW-33 comply with for calibration and verification?
It conforms to GB/T 16491-2008 (design), JJG 475-2008 (verification), ISO 7500-1:2018 (class 0.5), and ASTM E4-22 (load calibration), with optional NIST-traceable calibration certificates.
Can the system perform tests requiring strain control, such as cyclic loading or creep?
Yes—when equipped with an ASTM E83-compliant extensometer or video-based DIC system, it supports closed-loop strain control and time-dependent deformation protocols (creep, stress relaxation) per ASTM E139 and ISO 204.
Is the software validated for use in FDA-regulated environments?
With optional 21 CFR Part 11 module enabled, it provides electronic signature enforcement, role-based access control, immutable audit trails, and report archiving compliant with pharmaceutical and medical device QA/QC workflows.
What is the maximum specimen height accommodated without modification?
Standard configuration supports 800 mm vertical stroke; extended columns (up to 2600 mm total height) are available for tall specimens such as structural beams or full-scale gaskets.
Does Tuofeng provide installation, training, and ongoing technical support?
Yes—on-site commissioning, operator training (including method development and GLP documentation), and lifetime firmware updates are included; remote diagnostics and annual calibration services are offered under service-level agreements.
