A mechanical high-temperature creep testing machine capable of automatic and precise loading

Abstract

The invention discloses a mechanical high temperature creep testing machine capable of realizing automatic precise loading, belongs to the field of instruments of material science and machine manufacturing technologies and aims at solving the problems that when the existing mechanical creep testing machine employs a manual weight loading mode, cyclic load loading cannot be realized in the manual loading mode, when load is relatively high, the loading is relatively slow, labor intensity is relatively high, moreover, the load cannot be loaded continuously, and precision is relatively low. The mechanical high temperature creep testing machine is composed of a rack, a lever and connection mechanism, a weight automatic loading device, a rider precise fine-adjustment device, a lever self-leveling mechanism, a clamp and deformation measurement mechanism and a heating temperature control mechanism. Under the control of a control system, weight automatic loading and rider precise fine-adjustment can be realized, self-leveling can be carried out by a lever, and the problems that the existing manual loading mode is slow in loading and the cyclic load loading cannot be realized are solved; andmoreover, according to the mechanical high temperature creep testing machine, in a weight and rider combined loading mode, the continuous loading can be realized, so precision is relatively high.

Description

Technical field: [0001] The invention relates to a testing machine for testing high-temperature creep properties of materials, belonging to the field of instruments and meters of material science and mechanical manufacturing technology. Background technique [0002] Creep refers to the phenomenon that metal and non-metallic materials slowly produce plastic deformation under the long-term action of constant temperature and constant load. Under high temperature conditions, the effect of creep on components is particularly significant. Excessive creep deformation of high temperature components during service life will cause early failure of the component. Most of the failures of load-bearing components in high temperature environments are caused by high temperature creep caused by high temperature and high pressure. Compared with high temperature strength, high temperature creep can more effectively predict the strain trend and fracture life of the material when it is used fo...

AI Technical Summary

Problems solved by technology

At present, the loading of mechanical creep testing machines mostly adopts the manual method of hanging weights. This manual loading method cannot realize cyclic load loading, and the loading is slow and prone to impact. When a large load is required, the weight of the weight is also large, and the labor intensity also bigger

In addition, the minimum force that can be loaded on the sample by the mechanical creep testing machine is determined by the weight of the minimum suspended weight. For a lever with an amplification ratio of 10:1, even if a weight with a minimum force value of 1N is used, The minimum load generated on the sample is 10N, and the load cannot be adjusted continuously. To obtain more accurate loading, a smaller weight is required, and it is more inconvenient to load.

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