Super-plastic expansion anti-oxidation program control precise loading experiment device and method

A technology of loading experiments and experimental devices, which is applied in the direction of manufacturing tools, metal processing equipment, safety equipment, etc., can solve the problems of small deformation resistance, thinning, and experimental test failures, and achieves reduced loading lag, simple operation, and improved loading. Effects of Precision and Sensitivity

CN103071716AInactive Publication Date: 2013-05-01JILIN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2013-05-01
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a super-plastic expansion anti-oxidation program control precise loading experiment device and an experiment method. The device mainly consists of an anti-oxidation air source, two paths of loading air paths, a preheating and heating device, an edge pressing mold required by expansion and the like, wherein the loading air paths have the pressure test and control functions and respectively consist of precise pressure reducing valves, step motors, increment type rotating encoders, pressure sensors, high / low-pressure pressure switches, electromagnetic reversing valves and corresponding driving and control systems, the precise pressure reducing valves are driven by the step motors, and the encoders detect the motor rotating angle. The control systems control to complete various loading modes including the constant pressure, variable pressure, pressure saltus and the like. The high / low-pressure pressure switches are combined with a digital logic circuit for forming a safety protection device, and the damage and the pressure overload caused on the precise pressure reducing valves can be prevented. The loading device can adopt closed loop serial PID (proportion integration differentiation) control for the pressure regulation, the loading process is safe and reliable, and higher control precision and better response characteristics can be realized in the pressure regulating process.
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Description

Technical field:

[0001] The invention relates to a loading device and method for a superplastic bulging experiment, which is particularly suitable for a high-temperature anti-oxidation superplastic bulging program-controlled precision loading experimental device, and is also suitable for the actual production and trial production of superplastic 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. The experimental device for superplastic bulging must be able to measure the variation of the free bulging pole height with time or pressure. Since the superplasticity of metals has little deformation resistance at the optimum superplastic temperature, the initial superplastic bulging experimental device They are all obtained by the change of the displacement of the ejector rod in contact with the pole of the free bulgin...

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Embodiment Construction

[0037] The specific content and usage method of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0038] A superplastic bulging anti-oxidation program-controlled precision loading experimental device and method, the experimental device is mainly composed of an anti-oxidation gas source part, two pressure measurement and control loading gas circuits, a control system 19 and a host PC 20, the gas The source part is connected with the two-way pressure measurement and control loading air circuit, and the two-way pressure measurement and control loading air route is respectively installed on each air circuit with a precision pressure reducing valve 7, a pressure gauge C10, a pressure sensor 11 and its amplifying circuit, high and low pressure Composed of pressure switches 12, 13 and loading electromagnetic reversing valve 14, the precision decompression valve 7 is driven by a stepper motor 8, and the incremental ro...