Precision molding method for low-temperature radiometer concealed cavity

Abstract

The invention relates to a precision molding method for a low-temperature radiometer concealed cavity. The precision molding method for the low-temperature radiometer concealed cavity is characterizedby comprising the following steps that 1, precise machining of a core mold is carried out; 2, the surface of the core mold is coated; 3, part of the core mold is removed in a cutting mode; and 4, thecore mold is thoroughly removed in a chemical corrosion mode, so that precise molding of a cavity is completed, specifically, thermal treatment is conducted between the step 2 and the step 3 to remove stress of a coating. According to the new precision molding method for the low-temperature radiometer concealed cavity, the surface of the core mold is coated with a material, and then the core moldis removed, so that the problems that an existing method is low in bending precision, has welding defectives and welding deformation possibility and the like are solved. With adoption of the precision molding method for the low-temperature radiometer concealed cavity, size precision of the concealed cavity, form and position accuracy and inner surface roughness can be effectively ensured, the problems of signal leakage and the like are solved, and product consistency and yield are improved on the basis that the molding precision is improved.

Description

technical field [0001] The invention relates to the field of dark cavity forming, in particular to a precision forming method for a low temperature radiometer dark cavity. Background technique [0002] The low-temperature radiometer dark cavity is used for photoelectric signal processing. When the signal is transmitted into the dark cavity, the signal is reflected and absorbed by the internal slope of the dark cavity, the processing device, the coating on the inner surface of the cavity, etc. Reflection and absorption efficiency are important evaluation indicators for dark cavity performance. Generally, it is required that the angle of the slope at the bottom of the cavity be accurate, and there should be no gaps at the bottom and sides. Some product designers will design grooves on the side walls of the cavity to achieve better performance. absorption effect. [0003] Such products at home and abroad are basically formed by welding after bending thin plates. The existing ...

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Problems solved by technology

[0012] The present invention aims to solve the above problems, and provides a precision forming method for the dark cavity of a low temperature radiometer, which solves the problems of low bending precision, welding defects and welding deformation in the existing method; The problems of dimensional accuracy, shape accuracy, insufficient inner surface roughness and signal leakage caused by gaps of the dark cavity; solve the problem of low yield of dark cavity manufactured by the existing method

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