How to check the technical status and accuracy of the universal material testing machine

Universal Material Testing MachineAlso known as universal tension machine or electronic tension machine, it is a product of the combination of modern electronic technology and mechanical transmission technology. It fully utilizes the special characteristics of the mechanical and electrical system. It consists of a measurement system, a driving system, a control system and a computer (computer system-type tension testing machine). The microcomputer control system automatically controls the test force, displacement and deformation in various modes, completes the tensile, compression and bending tests of the sample, and can display, record and print the test data in real time.

How to verify the technical status and accuracy of the universal material testing machine? Using Hooke's Law (one of the basic laws of mechanics, the elastic law applicable to all solid materials: when a spring undergoes elastic deformation, the spring's elastic force Ff is proportional to the spring's elongation (or compression) x, that is, F=-k・x.k is the elastic coefficient of matter, which is determined by the properties of the material. The negative sign indicates that the elastic force generated by the spring is opposite to the direction of its elongation (or compression).), the accuracy of the test machine is determined based on the elongation amount of the standard tensile test sample converted into a force value and the force value of the test machine's dial to determine the accuracy.

The specific method is as follows: clamp the standard tensile sample with the corresponding force value on the test machine, and let the test machine stretch the standard tensile sample at the speed specified in GB/T228-2002. When the standard tensile sample is in a tensile state, install an extensometer or attach a strain gauge to it, so that the tensile test machine can continue to stretch the standard tensile sample. The extensometer or strain gauge displays the elongation amount of the standard tensile sample, convert the elongation amount into the tensile value, and then compare it with the same force value point as the standard tensile sample on the dial of the tensile test machine, and determine it based on the difference in the comparison value.http://www.hssdtest.com/