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Although the electronic universal testing machine and hydraulic universal testing machine belong to the mechanical test equipment, but because of the two in the drive power source, the main body structure, and the application of scalability has a large difference, decided the two in the actual application of different. The following is a brief introduction to the specific differences between the two from three aspects, I hope to help you buy the right product.
★ Structural Features
Electronic universal testing machine with servo motor as the driving power source, through the control system to drive the servo motor loading. The whole machine is mainly composed of the machine base, reduction drive system, ball screw, fixed beam, moving beam, force sensor, fixture (removable and replaceable), measurement and control system, test software and other parts. The main machine has a compact structure and takes up little space, compared with the hydraulic universal testing machine, the relative height is lower under the same test space conditions.
The structure of the electronic universal testing machine determines that it can be designed to cover the test force from 0.1N to 2000kN of different models, but also in the same host, through the expansion of different force sensors, configuration of the corresponding fixtures, coupled with professional test software to achieve a variety of tests within the force range.
Hydraulic universal testing machine is mainly composed of the main machine, servo oil source, measurement and control unit and test software. A high pressure hydraulic source is used as the power source. Manual valves, servo valves or proportional valves are used as control elements for control. Ordinary hydraulic universal testing machine can only be manually realized loading, belongs to the open-loop control system, the force measurement sensor is generally used hydraulic pressure sensor.
The mainframe of the double-space model is mainly composed of the sealing base, actuator, test space adjustment screw, loading beam (integrated clamping jaw, built-in hydraulic clamping mechanism), force transducer, displacement transducer, measurement and control unit, test software and other parts. The mainframe of the single space model consists of a load frame, actuator, hydraulic clamps, force transducer, displacement transducer, measurement and control unit, test software and other parts.
★ Operational Performance
Electronic universal testing machine
1 Servo motor drive, compact structure, high efficiency of energy use, easy to use and maintain, low noise, stable and reliable.
2 Three closed-loop controls for load control, strain control and displacement control can be achieved.
3 Wide range of force measurement, between 0.4% and 100% of the full range, the accuracy of force measurement can reach 0.5 grade.
4 Test speed range can be adjusted, test speed can be 0.001mm/min-1000mm/min, test stroke can be determined according to needs, more flexible.
5 Flexible test methods: test fixtures can be freely selected and replaced for models with a test range below 300kN, and external sensors and corresponding fixtures can be extended to meet different types of material mechanics tests (e.g. tensile, compression, bending, peeling, tearing, shearing, pulling and twisting tests).
6 High temperature ovens, high and low temperature chambers or other environmental chambers can be added for environmental simulation tests.
7 Large tonnage is more costly to manufacture.
Hydraulic universal testing machine
1 Hydraulic universal testing machine, limited by the configuration of the oil source, the test speed is low.
2 Compared with the electronic universal testing machine, the small tonnage (<300kN) comprehensive cost performance is low and scalability is poor.
3 The servo valve requires high filtration precision for the hydraulic oil of the oil source, and the hydraulic oil needs to be replaced regularly.
4 The hydraulic connection lines and joints are prone to oil leakage and the oil source is relatively noisy.
5 hydraulic oil source needs to be equipped with a cooling system (air-cooled or water-cooled), high energy consumption.
6 Hydraulic universal testing machine on the foundation requirements are very high, especially the large force value of the machine, the foundation needs to be prepared in accordance with the drawings provided by the testing machine manufacturer, the whole machine occupies a large space.
7 Hydraulic drive, strong power, more reliable and stable when doing large tonnage material mechanics test.
★ Application Scope
Electronic universal material testing machine, widely used in a variety of metals, non-metals, composite materials, medicine, food, wood, copper, aluminium, plastic profiles, wire and cable, paper, film, rubber, textiles, aerospace and other industries to test the tensile performance indicators, while a variety of test data processing software and test aids can be customized according to the standards provided by the user. Digital display electronic universal testing machine is suitable for users who only seek force value tensile strength and compressive strength and other related data. If your needs are more complex parameters, microcomputer-controlled electronic universal testing machine is the better choice. In terms of cost effectiveness, electronic universal testing machines below 30T are more advantageous.
Hydraulic universal material testing machine is mainly used for metal, non-metallic materials and parts, components, components of tensile, compression, bending and other mechanical properties of the test. Hydraulic universal testing machine is the ideal test equipment for industrial and mining enterprises, construction and building materials, water conservancy and hydropower, bridge engineering. Manual control of the hydraulic universal testing machine, cheap, suitable for industrial and mining enterprises of finished products inspection, single material index test. The electro-hydraulic servo universal material testing machine is suitable for higher requirements of steel, building materials testing type of laboratory. Compared to the electronic universal testing machine, the electro-hydraulic servo universal material testing machine of 30T or more, has more price advantage.
Universal testing machine is also known as universal tensile tester. Universal testing machine is used for a variety of materials for tensile, compression, bending, shear, tearing, peeling and other mechanical properties of the test machine with mechanical force. It is suitable for testing the physical and mechanical properties of plastic plates, pipes, profiles, plastic films and rubber, wires and cables, steel, glass fibre and other materials. In short, universal testing machine is a piece of indispensable testing equipment for material development, physical properties testing, teaching and research, quality control, etc.