Anti-oxidation program controlled accurate loading experiment device and method for super-plasticity free bulging through photoelectric measurement

Abstract

The invention relates to an anti-oxidation program controlled accurate loading experiment device and method for super-plasticity free bulging through photoelectric measurement. The device is mainly composed of anti-oxidation heating / loading systems I and II, a pole height photoelectric measurement system and a cooling system. The anti-oxidation heating / loading system I is a positive-pressure loading system, and the anti-oxidation heating / loading system II is a back-pressure loading system. Each of the two heating / loading systems is composed of a pure high-pressure argon source, a furnace outside heating and loading gas channel with pressure and temperature measurement and control functions and a control system. Non-oxidation heating can be performed on specimens through cooperation of the two anti-oxidation heating / loading systems, and loading modes such as constant pressure, pressure jump and superimposed back pressure can be achieved. Non-contact measurement is performed on the pole height of a bulging part through the photoelectric measurement system. Members required to be cooled are subjected to circulating cold water cooling through the cooling system. By means of the device, non-contact measurement of the pole height of the bulging part is achieved, specimen high-temperature oxidation can be effectively prevented, and the device and method have the advantages of being high in pressure adjusting accuracy, fast in response, safe and reliable in experiment process and the like.

Description

Technical field: [0001] The invention relates to a superplastic bulging experiment device, which is especially suitable for high-temperature anti-oxidation superplastic free bulging program-controlled precise loading experiment device and method, and is an important basis for superplastic filling and bulging forming. Background technique: [0002] Superplastic bulging technology occupies an important position in the fields of aviation, aerospace, automobiles and precision instruments, and has a good development prospect. Superplastic free bulging, fixed boundary, no friction, its bulging deformation law is the basis of superplastic filling and bulging. Moreover, the experimental device for free bulging must be able to measure the change law of the extreme height of free bulging parts with time or pressure, which is the mechanical basis for formulating different superplastic sheet filling and bulging process schemes. Since superplastic bulging is in a state of double tensile...

AI Technical Summary

Problems solved by technology

Although some difficult problems in the measurement of superplastic free bulging by contact measurement have been solved, due to the manual experimental control, the obtained results are quite rough and cannot meet the current requirements for superplastic bulging.

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