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

First, from the structural characteristics

The electronic universal machine mainly uses the servo motor as the power source, and the screw and the nut are used as the execution components to realize the speed control of the moving beam of the testing machine. In the transmission control, there are currently two main forms, the timing belt and the speed reducer. On the force measurement, the electronic universal testing machine uses load sensors.

The hydraulic universal machine, as the name suggests, uses a high-pressure hydraulic source 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 loaded manually. It belongs to the open-loop control system. Due to the price factor, the load cell generally uses a hydraulic pressure sensor.

Second, the use of performance

Electronic universal machine, no oil source. Therefore, it is cleaner, more convenient to use and maintain, and its test speed range can be adjusted. The test speed can reach 0.001mm/min-1000mm/min, the speed ratio can reach 1 million times, and the test stroke can be determined according to needs. flexible. The measuring force is high, and some can even reach 0.2%. The volume is small, the weight is light, the space is large, and it is convenient to add corresponding devices to do the mechanical tests of various materials. Really a multi-purpose machine.

The hydraulic universal machine is limited by the flow rate of the oil source and his test speed is low. Manual hydraulic universal testing machine, the operation is relatively simple, the price is cheap, but the control precision is low. Electro-hydraulic servo universal testing machine, compared with the electronic universal testing machine, the control accuracy is not bad except for the low speed. The microcomputer-controlled electro-hydraulic servo universal testing machine with load sensor can also achieve the accuracy of about 0.5%. . And when doing large-tonnage material mechanics tests, it is more reliable, more stable, and more cost-effective.

Third, the scope of application

Electronic universal testing machine, widely used in various metals, non-metal, composite materials, medicine, food, wood, copper, aluminum, plastic profiles, wire and cable, paper, film, rubber, textile, aerospace and other industries The test of the tensile performance index, the digital display electronic universal testing machine is suitable for users who only ask for relevant data such as tensile strength and compressive strength. If the demand takes more complicated parameters, the microcomputer control electronic universal testing machine is your better choice.

The hydraulic universal testing machine is mainly used for tensile, compression, bending and other mechanical properties tests of metal, non-metal materials and parts, components and components. The hydraulic universal testing machine is an ideal test equipment for industrial and mining enterprises, building materials, quality inspection centers, water conservancy and hydropower, bridge engineering, scientific research institutes, and mechanical laboratory of colleges and universities. The manually controlled hydraulic universal testing machine is cheap and suitable for the inspection of finished products and single material indicators of industrial and mining enterprises.

Large-tonnage electronic tension machines will also use hydraulic clamps. At present, there is no electric puller that does not use hydraulic clamps when making large loads. Domestically, only 60T electric pulls are made. It is very difficult to go up, and the hydraulic clamps leak oil. The problem has not been solved.


The power source of the electric pull is the motor, focusing on the non-metal

The hydraulic power source is hydraulic oil. The focus is on large tonnage metals.

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