Tuofeng TFW-140 Microcomputer-Controlled Servo Universal Testing Machine

Overview

The Tuofeng TFW-140 Microcomputer-Controlled Servo Universal Testing Machine is an electromechanical force-testing system engineered for high-precision static mechanical characterization of metallic, polymeric, ceramic, composite, and elastomeric materials. Based on closed-loop servo control architecture and calibrated load-cell transduction, the system implements standardized uniaxial tensile, compression, flexural, shear, tear, peel, and puncture testing per internationally recognized methodologies. Its modular mechanical design—featuring a rigid dual-column frame, preloaded high-precision ball screw transmission, and low-backlash worm gear reducer—ensures minimal deflection, excellent axial alignment, and long-term dimensional stability under cyclic loading. The machine operates under real-time PID-controlled displacement or load regulation, enabling strict adherence to test protocols requiring constant strain rate (e.g., ASTM E8), load hold (e.g., ISO 6892-1 Annex C), or displacement-controlled fracture mechanics evaluation. Designed for laboratory and industrial QA/QC environments, the TFW-140 meets metrological traceability requirements defined in ISO/IEC 17025 and supports audit-ready documentation for GLP and GMP-regulated workflows.

Key Features

• 0.5-class accuracy certified per GB/T 16491–2008 and ISO 7500-1:2018, with force measurement uncertainty ≤ ±0.005% of reading across the full 0.2–100% FS range
• Single-resolution 24-bit analog-to-digital conversion (1:500,000 internal resolution) eliminates range-switching artifacts and ensures consistent sensitivity from sub-newton to 140 kN loads
• Dual-speed motorized crosshead actuation (fast positioning + fine adjustment) with programmable return-to-start functionality and emergency stop interlock
• Integrated overload protection triggers automatic shutdown at 110% of rated capacity, supplemented by hardware-based electronic limit switches and mechanical hard stops
• Modular extensometry support: compatible with clip-on axial extensometers (for modulus and yield determination) and non-contact video extensometers (for large-strain or soft-material applications)
• Rigid frame construction with reinforced base plate and adjustable leveling feet ensures vibration isolation and repeatability in multi-shift production labs

Sample Compatibility & Compliance

The TFW-140 accommodates specimens ranging from miniature coupons (e.g., ASTM E345 strip samples) to structural components up to 600 mm wide and 800 mm tall. Standardized fixtures—including wedge-action tensile grips, compression platens, three- and four-point bend assemblies, shear adapters, and peel test fixtures—are supplied with NIST-traceable calibration certificates. Custom tooling (e.g., torsion fixtures, pneumatic clamps, elevated-temperature chambers) can be integrated via ISO-standard mounting interfaces. The system fully supports compliance testing per ASTM D638 (plastics), ASTM D3039 (composites), ISO 527-2, ISO 178, EN 10002-1, GB/T 228.1, and JIS Z2241. Calibration records, verification reports, and uncertainty budgets are maintained in accordance with JJG 475–2008 and ISO/IEC 17025 requirements.

Software & Data Management

The Windows-based TFW-TestSuite v4.2 software provides ISO 17025-compliant data acquisition, analysis, and reporting. It supports seven control modes: load control, displacement control, strain control, load rate control, displacement rate control, strain rate control, and hold (load/displacement/strain). Real-time plotting includes synchronized force–displacement, stress–strain, force–time, and extension–time curves, with on-screen digital readouts of peak load, offset yield, modulus, elongation at break, and energy absorption. All raw data streams (force, displacement, extensometer signal) are logged at ≥1 kHz sampling rate with embedded time stamps. Software features include multi-curve overlay comparison, statistical summary (mean, min, max, CV%), automated report generation (PDF/Excel), password-protected user roles, and full 21 CFR Part 11 audit trail capability—including electronic signatures, change history, and immutable raw-data archiving. Firmware and software updates are delivered free of charge for the instrument’s operational lifetime.

Applications

The TFW-140 serves as a primary mechanical test platform across R&D, quality assurance, and regulatory submission workflows. In aerospace, it validates tensile properties of Ti-6Al-4V sheet and carbon-fiber prepreg laminates per ASTM D3039. In automotive supply chains, it verifies weld strength of aluminum chassis components (ISO 14273) and tensile integrity of EPDM seals (SAE J2236). In medical device manufacturing, it performs peel tests on sterile packaging (ASTM F88) and tensile evaluation of suture materials (ISO 10555-1). Academic laboratories use it for constitutive modeling of hydrogels and biodegradable polymers, while construction material labs apply it to compressive strength testing of concrete cylinders (ASTM C39) and flexural performance of fiber-reinforced cementitious composites (ASTM C1609). Its versatility extends to powder metallurgy (green strength testing), wire and cable qualification (IEC 60811), and rubber compound development (ASTM D412).

FAQ

Does the TFW-140 comply with FDA 21 CFR Part 11 for electronic records and signatures?

Yes—the TFW-TestSuite software includes role-based access control, electronic signature capture, immutable audit trails, and full data integrity validation per 21 CFR Part 11 Annex A requirements.
Can the system be calibrated using third-party accredited laboratories?

Absolutely. The machine accepts calibration certificates issued by CNAS-, A2LA-, or UKAS-accredited providers; all load cells and encoders bear individual serial-numbered calibration reports traceable to NIM (China) or NIST (USA).
Is thermal testing capability available as an option?

Yes—environmental chambers (-70°C to +300°C) with integrated temperature feedback loops can be mounted directly onto the load frame, enabling ASTM D695 and ISO 604 compliant hot/cold tensile testing.
What is the warranty coverage and service response time?

Tuofeng provides a 24-month parts-and-labor warranty with on-site technical support within 72 business hours in Tier-1 Chinese cities and remote diagnostics globally. Extended service contracts include annual metrological verification and preventive maintenance.
How is data export handled for LIMS integration?

Raw ASCII (.txt) and structured XML files are generated per test, containing metadata (operator ID, sample ID, standard reference, environmental conditions) and time-series channel data—compatible with major LIMS platforms via FTP or direct ODBC connection.