In an era where automotive lightweighting and safety requirements are becoming increasingly stringent, material mechanical property testing has become a core component of vehicle structural design. The four-column electro-hydraulic servo pressure testing machine developed by Shenzhen SASTEST Technology Co., Ltd. (www.szsaastest.cn) delivers robust support for verifying the mechanical properties of automotive components and various materials, leveraging three key technologies: high-precision force control, a stable hydraulic system, and intelligent data acquisition.

Regarding the four-column, high-rigidity precision measurement platform

The four-column electro-hydraulic servo pressure testing machine is one of the mechanical testing equipment developed by Shenzhen Sansi Testing. Featuring a high-rigidity four-column main structure, it delivers an ultra-high testing force capacity of up to 5000 kN. Available in multiple models ranging from EYA105SS (100 kN) to EYA506W (5000 kN), it meets comprehensive testing requirements for both lightweight materials and heavy-duty structural components.

The testing machine achieves an accuracy class of 0.5, with a test force measurement range covering 1%–100% FS (full scale), and the test force reading error is controlled within ±0.5%. The main unit offers three plate spacing adjustment methods—cylinder lifting, pad stacking, or worm gear lifting—depending on the model, allowing a maximum upper-lower plate spacing of 1500 mm and a maximum test width of 500 mm × 800 mm. It is widely applicable for compression performance tests of metal, non-metal, and composite material specimens, as well as other high-precision mechanical tests requiring stringent requirements for accuracy, stiffness, and deformation control.

Core Technology: Precision Loading and Intelligent Measurement & Control

The testing machine is equipped with imported servo valves, offering rapid response and high control accuracy. The loading speed can be arbitrarily set within the equipment's permissible range, and it features closed-loop control of force and stress, as well as constant stress control and load holding functions, ensuring stability and controllability under various complex loading conditions. The force measurement system employs high-precision load sensors to fully guarantee the accuracy of test data. The hydraulic system incorporates an air-cooling unit, enabling prolonged continuous operation, and utilizes an imported low-noise high-pressure oil pump to create a quiet operating environment.

Core Application Field: Automotive Safety Structure Inspection

In the field of automotive passive safety, the four-column electro-hydraulic servo pressure testing machine plays an irreplaceable and critical role.

Three-point bending test for crash beam assemblies: This testing machine accurately measures the bending strength, yield limit, and bending deformation characteristics of crash beams under lateral loads. When paired with a specialized three-point bending fixture, it enables testing in accordance with industry standards such as GB/T 232, ISO 7438, and ASTM D790, allowing quantitative evaluation of material fracture behavior and bending modulus under bending loads. Testing of automotive engineering plastics and similar components strictly follows the ISO 178 standard, with a loading rate controlled at 2 mm/min. The obtained data provides critical insights for optimizing the geometric design and strength of front-end crash structures, ensuring effective protection of critical vehicle components during low-speed collisions.

 static crush test: Using a quasi-static compression method, axial or lateral loads are applied to the threshold beam component to accurately evaluate its compressive strength, deformation resistance, and total energy absorption capacity. This test is critical for ensuring the reliability of the vehicle's side protection structure, enabling designers to precisely understand the structural response of the threshold beam under side collision conditions.

Energy-absorbing box crush test: This scientific evaluation assesses the energy-absorbing box's crush efficiency, energy absorption capacity (e.g., specific energy absorption value [SEA]), peak load, and average crush load, while analyzing its collapse pattern and folding mechanism. These data provide critical guidance for optimizing the box's structural topology, wall thickness, and induction groove design, serving as mandatory testing requirements to comply with stringent collision safety regulations.

Professional fixture configuration

To meet the diverse testing requirements for automotive components and various materials, Shenzhen Sansi Testing has established a comprehensive fixture system. The three-point bending fixture is suitable for testing the bending performance of materials such as crash beams, featuring adjustable span and compatibility with both standard and non-standard specimens. The compression fixture and press plate offer multiple specifications of upper and lower plates (ranging from a minimum of 350mm × 350mm to a maximum of 600mm × 600mm), enabling compression tests on materials ranging from metals and cement products to petroleum pipelines. Additionally, the company provides a range of customized auxiliary fixtures—including tensile and shear fixtures—that address the mechanical performance testing needs of various materials such as metal sheets, fasteners, and composite materials.

The electro-hydraulic servo pressure testing machine developed by Shenzhen Sansi Testing Technology Co., Ltd. has become a core instrument in automotive safety testing and scientific research, offering a comprehensive range of testing capabilities from 100 kN to 5000 kN, supported by a 0.5-class high-precision measurement and control system and intelligent operational workflows. From evaluating the bending resistance of crash beams to assessing the collapse performance of energy-absorbing boxes, this 'high-rigidity platform' consistently provides precise data to empower design and R&D efforts, thereby safeguarding road safety and advancing materials science.