How to choose an electronic universal test machine

Electronic universal testing machineIt is an instrument and equipment that tests mechanical properties and process performance of various materials, spare parts and components, also known as a mechanical performance test machine. There are many things to pay attention to during the daily purchase process, such as structural characteristics, performance, application and cost-effectiveness.
1. In terms of structural characteristics
The electronic universal test machine mainly uses a servo motor as the power source, and the lead screw and wire master as the execution components to realize the speed control of the moving beam of the test machine. In terms of transmission control, there are currently two main forms: synchronous belt and reducer; in terms of force measurement, both electronic universal testing machines use load sensors.
The hydraulic universal testing machine mainly uses high-pressure hydraulic source as the power source, and uses manual valves, servo valves or proportional valves as control elements for control. Ordinary hydraulic universal testing machines can only be loaded manually and are open-loop control systems. Affected by price factors, the force sensor generally uses hydraulic pressure sensors. Electro-hydraulic servo universal testing machines use servo valves or proportional valves as control components for control, and some domestic manufacturers have also used high-precision load sensors to measure force.
2. In terms of performance
The electronic universal test machine does not use oil sources, so it is cleaner and more convenient to use and maintain; its test speed range can be adjusted, the test speed can reach 0.001mm/min ~ 500mm/min, and the test stroke can be determined according to needs, making it more flexible; the force measurement accuracy is high, and some can even reach 0.2%; it is small in size, light in weight, large space, and convenient to use corresponding devices to perform various material mechanics tests, truly achieving multiple uses in one machine. Currently, the electronic universal testing machines produced by mainstream domestic testing machine manufacturers can all achieve closed-loop control such as load control, strain control, displacement, speed control, etc.
Hydraulic universal testing machine has a low test speed due to the limitation of oil source flow. The manual hydraulic universal testing machine is simple to operate and cheaper, but has a low control accuracy; the electro-hydraulic servo universal testing machine has a low performance, except for its low speed, and the control accuracy is not inferior; the microcomputer that uses load sensors to control the electro-hydraulic servo universal testing machine has a force value accuracy of about 0.5%, and it is more reliable, more stable, and more cost-effective when performing large-tonnage material mechanical tests.
3. In terms of application scope
Electronic universal testing machine is widely used in various metal, non-metal and composite materials, such as wood, plastic profiles, wires and cables, paper, film, rubber, medicine, food packaging materials, fabrics, etc. for testing tensile performance indicators. At the same time, various test data processing software and test auxiliary tools can be customized according to the domestic and international standards provided by users. Digital display electronic universal testing machine is suitable for users who only seek related data such as force value, tensile strength, compressive strength, etc. If you need to take more complex parameters, it is a better choice for microcomputer-controlled electronic universal testing machine.
4. In terms of cost-effectiveness
Electronic universal testing machines below 30 tons have more advantages. Hydraulic universal testing machine is mainly used for mechanical properties such as tensile, compression, bending, etc. of metals, non-metallic materials and parts, components and components. The hydraulic universal testing machine is an ideal testing equipment for industrial and mining enterprises, construction materials, quality inspection centers, water conservancy and hydropower, bridge engineering, scientific research institutes, and mechanics laboratory of colleges and universities. Manually controlled hydraulic universal testing machine is cheap and suitable for finished product inspection and material index testing of industrial and mining enterprises; while electro-hydraulic servo universal testing machine is suitable for steel and building materials testing laboratories, scientific research institutions and colleges with high requirements. Compared with electronic universal testing machines with more than 30 tons, the price advantage is obvious.http://www.hssdtest.com/