Universal material testing machine is also called universal tensile machine or electronic tensile machine. It is a combination of modern electronic technology and mechanical transmission technology. It fully utilizes the special precision testing instruments composed of electromechanical strengths. It consists of driving system, measuring system and control system. And computer (computer system type tensile testing machine) and other structural components. The microcomputer control system automatically controls various modes of test force, displacement and deformation, and completes the tensile, compression and bending test of the sample, and can display and record the test data in real time. The metal tensile machine is also a kind of universal material testing machine.
Take the metal tensile machine , how to verify the technical state and accuracy of the metal tensile machine?
Using Hooke's Law (one of the basic laws of mechanics, applicable to the law of elasticity of all solid materials: when the spring is elastically deformed, the spring force Ff is proportional to the spring's elongation (or compression) x, ie F=- k·xk is the elastic coefficient of the material, which is determined by the nature of the material. The negative sign indicates that the spring force generated by the spring is opposite to the direction of its elongation (or compression).), converted to the force according to the elongation of the standard tensile specimen. The value is compared with the test machine force value to determine the accuracy of the metal tensile machine .
The specific method is as follows: the standard tensile force sample with the corresponding force value is clamped on the testing machine, and the test machine is used to stretch the standard tensile force sample according to the speed specified in GB/T228-2002 standard, when the standard tensile force sample is in the tensile state. Attach an extensometer or a strain gauge to the metal tensile machine to continue stretching the standard tensile specimen. The extensometer or strain gauge displays the elongation of the standard tensile specimen and converts the elongation into The tensile value is then compared with the same force point on the tensile tester dial as the standard tensile test sample, based on the difference between the comparative values.
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Carbomer is an acrylic resin obtained by cross-linking pentaerythritol with acrylic acid. It is a very important rheological regulator. After neutralization, carbomer is an excellent gel matrix, which has important applications such as thickening suspension. According to the dry product calculation, including carboxylic acid group (-cooh) should be 56.0 % ~ 68.0%.
Common carbopol series include: Carbopol 940, 941, 934, 1342, 980, ETD 2020, AQUA sf-1, Ultrez 21, Ultrez 20, etc.
Carbomer,Carbopol,Carbopol 940, Carbomer 940, Carbomer 980, acrylic acid
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