How to choose the metal material test machine The metal material test machine is mainly used for the large load test machine (50kN-2000kN), and some materials such as metal sheets, wires, metal foils, etc. require a small load test machine. Conventional tests for metallic materials include stretching, compression, bending, shearing, high temperature stretching, and high temperature durability. The convenience of machine operation should be considered for customers who need multiple test methods. It is convenient to consider the stretching space mainly for metal stretching. It is convenient to consider space compression mainly based on metal compression. A single hydraulic material can be considered for the configuration of the hydraulic clamp (the fixture is not disassembled). For the testing of various materials, it is required to replace the different fixtures. It is recommended not to configure the hydraulic clamps (inconvenient to disassemble) and use manual stretching fixtures. For tensile testing of metallic materials, the requirements for tensile testing of metallic materials in GB228-2002 "in the elastic range and up to the upper yield strength, the separation rate of the test machine chuck should be kept as constant as possible and at the specified stress rate. Within the range (material elastic modulus E / (N / mm2) < 150000, stress rate control range is 2-20 (N / mm2) s-1, material elastic modulus E / (N / mm2) ≥ 150000, stress The rate control range is 6-60 (N/mm2)?s-1=. If only the lower yield strength is measured, the strain rate during the yield of the parallel length of the sample should be between 0.00025/s and 0.0025/s. The strain rate should be kept as constant as possible. The strain rate should not exceed 0.0025/s in the plastic range and up to the specified strength (specified non-proportional extension strength, specified total extension strength and specified residual extension strength). To meet the above test conditions, the test The control of the machine should be able to realize the three closed-loop control function, which can realize the control methods of stress, strain, displacement, etc. For the tensile test of metal materials, the electronic extensometer should be configured to take the elastic modulus and Rp0.2. The deformation amount of the gauge is 5-10mm. When testing high-hardness metal materials, there are special requirements for the hardness of the jaws and pressure plates. Customers should make requests when ordering the test machine. http://news.chinawj.com. Cn Submission:
Instrument Cnc Lathe Machine,Instrument Cnc Machine,Instrument Cnc Lathe,Bearing Ring Thread Machine
Shaoxing Sunfong Intelligent Equipment Inc. , https://www.zjsxsunfong.com