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What is the difference between an electronic universal material testing machine and a hydraulic universal material testing machine?
Source:wbe  Popularity:178  Time:2019-06-11
Although the electronic universal material testing machine and the hydraulic universal material testing machine are both “universal material testing machines”, they are different. Many people here say that they are not called universal material testing machines. ? So today, Xiaobian will explain the difference between the two.


First, the difference between power sources:

1. Electronic universal material testing machine

The servo motor is used 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. Domestically, test machine manufacturers in Changchun use synchronous belts, and test machine manufacturers from Hongshan use reducers. Regarding its advantages and disadvantages, it remains to be explored, but it does not affect the user's use. On the force measurement, the electronic universal testing machine uses load sensors.


2. Hydraulic universal material testing machine

A high-pressure hydraulic source is used as a 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. The electro-hydraulic servo universal material testing machine uses a servo valve or a proportional valve as a control element for control. Some domestic manufacturers have also adopted high-precision load sensors for measuring force.


Second, the difference between the oil source:

1. Electronic universal material testing 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 electronic universal testing machine produced by Tuofeng Instrument Testing Machine can achieve load control, strain control and displacement control.


2. Hydraulic universal testing machine

Limited by the flow rate of the oil source, the 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.


in conclusion:

Electronic universal material testing machine, widely used in various metals, non-metals, composite materials, medicine, food, wood, copper, aluminum, plastic profiles, wire and cable, paper, film, rubber, textile, aerospace and other industries. Test the tensile performance index, and at the same time, according to the domestic and international standards provided by users, various test data processing software and test aids can be customized. 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 a better choice for you. In terms of cost performance, the electronic universal testing machine below 30T has advantages.


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