What are the maintenance procedures and force value calculation methods of tensile testing machines?

Tensile testing machine is also known as universal material testing machine. The universal testing machine is a testing machine used to test mechanical afterburners for various materials such as static loading, tensile, compression, bending, shearing, tearing, peeling, etc. Let me share with you the maintenance process of the tensile tester and the force value calculation method.

1. Maintenance process of tensile testing machine

maintainance

1. Check the screws in the jaw area regularly. If they are found to be loose, tighten them in time.

2. The sliding surfaces in which the steel plate inset and the lining plate and the dovetail groove surface on the lining plate should be kept clean, and a thin layer of MoS2 (molybdenum disulfide) grease should be applied regularly.

3. Check the transmission status of the sprocket regularly. If you find loose, please re-tension the tensioner.

Oil source maintenance

1. Regularly check whether there is any oil leakage at the main engine and oil source. If there is oil leakage, replace the sealing ring or combination gasket in time.

2. Regularly replace the oil suction filter and filter element according to the use of the machine and the service life of the oil, and replace the hydraulic oil.

3. When not doing tests for a long time, be careful to turn off the mains power supply. If the machine is in standby state, the switch should be turned to the "load" setting, because if the switch is turned to the "quick reversal" setting, the solenoid reversing valve is always in the power-on state, which will affect the service life of the device.

Maintenance of tensile testing machine control system

1. Regularly check whether the connection line between the measurement and control card and the test machine is in good contact. If it is loose, it should be tightened in time.

2. If you do not use the machine for a long time after the test, turn off the computer and unplug the measurement and control card.

3. The interfaces on the controller are one-to-one. If the interface is inserted incorrectly, the device may be damaged.

4. The connector on the plug-in and unplug the controller must be powered off.

5. Regularly replace the oil suction filter and filter element according to the use of the machine and the oil service life, replace the hydraulic oil, and regularly check whether there is any oil leakage at the main machine and oil source. If there is oil leakage, the sealing ring or combination pad should be replaced in time.

2. Calculation method of tensile test machine force value

Everyone has paid attention to the problem of calculating the stress value of tension. Everyone knows that the tensile testing machine is the best equipment for testing the tensile performance of materials. So how do the tensile testing machine test the performance of the material and how do the force value be calculated? The calculation of the force value of the tensile tester is based on the force value of the tester's inspection range. The standard tensile tester of the response force value is clamped on the tester. The tester is allowed to stretch the standard tensile tester according to the speed of the GB/T228-2002 standard rules. When the standard tensile tester is in the tensile form, an extensometer or a strain gauge is installed on it, so that the tensile tester can continuously stretch the standard tensile tester. The extensometer or strain gauge displays the elongation amount of the standard tensile tester, converts the elongation amount into the tensile tester value, and then compares it with the same force value point as the standard tensile tester on the dial of the tensile tester, and determines the skill form and accuracy of the tester based on the difference in the comparison value.

This method uses Hooke's law to compare the elongation amount of the standard tensile test sample into force value and the force value of the test machine dial to determine the accuracy of the test machine. This method greatly simplifies the verification operation process, and provides great convenience and standardization for the daily verification of the original tensile form of the test machine.

The above is an introduction to the maintenance process of the tensile tester and the force value calculation method. In the process of selection, users can make choices based on their own situation. Hope it can help everyone!