50kN-100kN Computer-Controlled Electronic Universal Testing Machine Technical Proposal

I. Product Overview

This product is widely used for tensile, compression, bending, and shear tests of metallic and non-metallic materials. With a wide variety of optional accessories, it can also be used for testing the mechanical properties of profiles and structural components.

It has a broad application prospect in testing materials with large deformation and high test speed, such as plastics, ropes, belts, wires, and rubber.

The machine is suitable for various testing fields, including quality inspection, teaching and scientific research, aerospace, steel and metallurgy, automobile manufacturing, and construction materials industries.

II. Standards Compliance:

ASTMA370, ASTME4, ASTME8, ASTME9, ASTM D638, ASTM D882, ASTM D3039,ASTM, D3479, ASTM E517,ASTM, D695, ASTM D6641, ASTM D3410, ASTM D7791, ASTM D412, ISO6892, ISO527-3, ISO527-4, ISO7438, ISO7500-1, EN10002-4, GB/T228-2002, GB16491-2008, HGT 3844-2008 QBT 11130-1991, GB13-22-1991, HGT 3849-2008, GB6349-1986, GB/T 1040.2-2006,  ASTM C165, EN826, EN1606, EN1607, EN12430.

III. Appearance

(Refer to product samples; the actual product shall prevail.)

IV. General Description

The Computer-Controlled Electronic Universal Testing Machine mainly consists of the load frame, gripping accessories, electrical measurement and control system, and operating software.

4.1 Load Frame

The load frame is mainly composed of upper and lower crossheads, middle crosshead, columns, transmission assembly, fully enclosed protective cover, load cell, and extensometer.

It adopts a dual-space portal structure, formed by connecting the upper and lower crossheads with the columns. The movable middle crosshead allows for tensile testing in the upper space, and compression, bending, and shear tests in the lower space.

· Upper, Lower, and Middle Crossheads: Made from forged 45# alloy steel, ensuring the required rigidity of the machine. Precision machining through CNC machining centers ensures dimensional and geometric tolerances, providing excellent coaxiality and parallelism. The surface is treated with sandblasting, primer coating, and top paint spraying for enhanced corrosion resistance and aesthetics.

· Columns: Made from hardened alloy steel shafts with hard chrome plating, precisely machined on CNC lathes to ensure the rigidity of the frame, reduce external interference factors, and guarantee testing accuracy.

· Transmission Assembly: The transmission system consists of a servo motor, synchronous pulley, synchronous belt, and precision ball screw pair. The use of arc-tooth synchronous belts and ball screw transmission ensures smooth operation with low noise.

· The specially designed reducer and precision ball screw assembly drive the movable crosshead with zero backlash. The reducer replaces the traditional belt-driven reduction mechanism, resulting in greater operational stability, extended belt service life, reduced belt replacement frequency, and lower maintenance costs, while significantly improving efficiency.

· Fully Enclosed Protective Cover: Provides comprehensive protection for operator safety. The powder-coated finish offers strong adhesion, corrosion resistance, and an elegant appearance.

· Load Cell: The load cell is an independently developed product by our company, specially designed for electronic universal testing machines. It features low zero drift, high sensitivity, imported strain gauges, excellent insulation, stable repeatability, and a nickel-plated surface for improved durability.

· Large Deformation Extensometer: Equipped with two high-precision encoders and a counterweight mechanism to eliminate the influence of the extensometer on the specimen, ensuring more accurate deformation measurement.

4.2 Gripping Accessories

Standard Configuration: One set of wedge-type tensile grips.

4.3 Electrical Measurement and Control System

• Servo Drive System: Uses an AC servo system and servo motor, offering stable, reliable performance and high control accuracy.

• Safety Protection Functions: Equipped with overload, overcurrent, overvoltage, upper and lower limit, and emergency stop protection features.

• Built-in Controller:

· Uses a 32-bit high-speed ARM chip as the main control unit, providing fast computation and data processing.

· Capable of handling data acquisition, PID calculation, network communication, and output control in real time for precise closed-loop control.

· Supports remote firmware upgrade and customized functional extensions.

• Input Channels:

· 3 high-precision 24-bit A/D conversion channels, standard sampling frequency 50 Hz, with an effective resolution of up to 1/500,000; digitally adjustable gain; multi-point calibration for each sensor.

· 3 quadrature digital encoder input channels, one 10M/bit opto-isolated differential input for draw-wire or servo motor encoders, and two for large deformation extensometer interfaces.

· 8 digital input ports configurable for limit and emergency stop functions; can interface with a handheld controller for extended operations.

• Output Channels:

· 1 PWM output, configurable base frequency (standard 50 Hz).

· 1 PWM-H advanced output, with adjustable vibration frequency and amplitude (50–1000 Hz, 5–40% Vpp).

· 8 digital outputs (DO), 24 V / 1 A, capable of directly driving relays or solenoid valves.

• Network Communication:

· USB 2.0: High-speed communication with PCs or laptops; industrial-grade anti-interference design; compatible with all Windows systems.

· Wi-Fi (802.11 b/g/n): Direct connection with Windows 10 tablets.

· Industrial Ethernet: 10/100 Mbps data rate.

· RS485 Industrial Interface: Supports MODBUS and HMI communication.

• Data Retention:

· All calibrated control parameters are automatically stored and retained even when connected to a different computer.

Return Function: At the end of the test, the crosshead can return to the initial position automatically or manually at high speed.

• Control Features: Achieves true physical zeroing, gain adjustment, automatic range switching, zeroing, calibration, and data saving — eliminating all analog adjustment circuits for a highly integrated control system.

• Electrical Circuit Design: Designed according to international electrical standards and national testing machine electrical specifications; features strong anti-interference capability, ensuring controller stability and data accuracy.

• Network and Data Management: Equipped with network interfaces for data transfer, storage, printing, and remote transmission, allowing connection to intranet or Internet systems.

V . Technical Specifications

Ⅵ. System Configuration

(I) Main Frame

(II) Electrical Measurement and Control System

(III) Test Accessories

(IV) Accompanying Documents

Ⅶ. Confidentiality of Technical Information and Documents

1. This technical proposal is the proprietary technical documentation of our company. The user shall maintain confidentiality of all technical information and materials provided by us. This confidentiality obligation remains effective permanently, regardless of whether this proposal is adopted.

2. Our company likewise undertakes confidentiality obligations for any technical information or materials provided by the user.