Gum dipping process method for aerospace rocket chemical milling parts

Abstract

The invention provides a gum dipping process method of aerospace rocket chemical milling parts. The gum dipping process method sequentially comprises the following steps of clamping a workpiece, grabbing and transporting, gum dipping, surface drying, overturning and unloading the workpiece, wherein in the gum dipping process, the parts are integrally dipped into a gum pool, the viscosity of a gumsolution in the gum pool is 30-35s, and the gum dipping time is 5-10s. Automatic gum dipping processing can be achieved for products such as phi 3350mm-grade melon-petal-shaped parts, phi 5000mm-grademelon-petal-shaped parts and phi 3350mm-grade wall plates which are large in size, irregular in shape and high in chemical milling quality requirement in a spaceflight rocket storage box, the operation is convenient, the gum applying requirement before chemical milling of products is met, and the chemical milling processing efficiency and the chemical milling quality of model products are improved.

Description

technical field [0001] The invention belongs to the technical field of dipping chemical milling parts, in particular to a process method for dipping chemical milling parts of aerospace rockets. Background technique [0002] In the production process of my country's active launch vehicles, the manufacture of tanks is the key to model development. At the same time, with the increase of launch tasks year by year, the product quality and production cycle of tank parts have attracted much attention. At present, because chemical milling has the advantages of low cost and high production efficiency compared with mechanical processing, it is still the main process method for local thinning of melon petals and wall panels of storage tanks. [0003] In the process of chemical milling and cutting, it is necessary to partially protect the inner and outer surfaces of parts by coating protective glue, and then complete the processing of products through profiling, chemical milling and oth...

AI Technical Summary

Problems solved by technology

[0004] At present, the parts of the launch vehicle storage tank are basically protected by manual glue brushing. Manual operation is greatly affected by human and environmental factors, which may easily lead to poor quality and uneven thickness of the glue layer, which in turn leads to out-of-tolerance, scrapped

Moreover, in the brushing process, only one side of the product can only be glued multiple times at a time. After the thickness of the protective glue meets the requirements, the other side can be glued multiple times. The entire glue coating process takes a long time, resulting in a production cycle

In addition, the organic solvents used for gluing are benzene series, and the on-site operating environment is harsh, and there are great health risks for operators during long-term operations

[0005] With the sudden increase of active rocket launch missions, the characteristics of low production efficiency, unstable quality, and poor operating environment of manual glue brushing have become increasingly prominent, which can no longer meet mission needs and quality requirements

[0006] (1) Low production efficiency

Glue the melon petals and wallboards on one side. After the thickness of the glue layer meets the requirements for multiple brushes, then glue the other side. The overall glue brushing time is 1.5 days, accounting for 1% of the product's chemical milling processing cycle. / 2, the gluing process seriously affects the production progress

[0007] (2) The quality of chemical milling is poor

In the process of chemical milling, the number of times of manual glue application is long and the time is long. The quality of the glue layer is greatly affected by human factors and environmental factors. Quality problems such as glue layer defects and poor thickness uniformity are prone to occur, resulting in out-of-tolerance chemical milling products. ,scrapped

[0008] (3) Poor working environment

Manual glue application needs to be operated in a closed environment. The temperature reaches 38°C in summer and -10°C in winter. The operating environment is harsh, and the glue uses benzene series as a solvent. Long-term operation will cause great harm to the health of operators.

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