The difference between universal tensile testing machine and hydraulic universal testing machine

Universal tensile testing machine and hydraulic universal testing machine can be used to test all kinds of materials, then what is the difference between them? Next to learn together with Xiao Bian! Universal tensile testing machine and hydraulic universal testing machine belong to the material mechanics testing equipment, but have their own characteristics in the aspects of structural design, performance, application range and so on.

First, in the structural characteristics. Universal tensile testing machine mainly uses servo motor as the power source, screw and nut as the executing parts to realize the speed control of the moving beam of the testing machine. In transmission control, there are currently two main forms, timing belts and speed reducers; in the force measurement universal tensile testing machine uses load sensors. Hydraulic universal testing machine mainly uses high pressure hydraulic source as the power source, and adopts manual valve, servo valve or proportional valve as control element to control. Ordinary manual loading can only be achieved manually, is an open-loop control system, subject to price factors, force sensors generally use hydraulic pressure sensors. Electro-hydraulic servo universal testing machine uses servo valve or proportional valve as control element to control.

Second, in the use of performance. Universal tensile testing machine does not use oil, so it is cleaner, easier to use and maintain; its test speed range can be adjusted, test speed up to 0.001mm/min ~ 1000mm/min, speed ratio up to 1 million times, test Stroke can be set according to needs, more flexible; high precision force measurement, and some can even reach 0.2%; small size, light weight, large space, easy to add the appropriate device to do the mechanical testing of materials, truly a multi-purpose machine. Hydraulic universal testing machine, limited by the flow of oil source, the test speed is low. The manual testing machine has simple operation and low price, but the control accuracy is low. The load-controlled microcomputer-controlled electro-hydraulic servo universal testing machine can achieve the force value accuracy of about 0.5%.

Third, in the scope of application. Universal tensile testing machine is widely used in a variety of metal, non-metal and composite materials, such as wood, plastic profiles, wire and cable, paper, film, rubber, pharmaceuticals, food packaging materials, fabrics, etc. for tensile performance testing. At the same time, various test data processing software and test aids can be customized according to domestic and international standards provided by users. Hydraulic universal testing machine is mainly used for tensile, compression, bending and other mechanical properties of metal, non-metal materials and parts, components, and components. It is an industrial and mining enterprise, building materials, quality inspection center, water conservancy and hydropower, bridge engineering, scientific research institutes. Ideal test equipment for mechanical laboratories in universities and colleges. Manually controlled hydraulic testing machine is cheap, suitable for industrial and mining enterprises' finished product inspection, single material index testing; and electro-hydraulic servo universal testing machine is suitable for higher requirements of steel, building materials testing laboratory.

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