Tool for heat treatment of solid rocket engine shell

Abstract

The invention provides a tool for the heat treatment of a solid rocket engine shell. A quenching lifting appliance and a technical lifting ring are used in a cooperation manner. One ends of six support plates in the quenching lifting appliance are all fixed to the circumferential surface of a vertical column, the other ends of the support plates are lifting arm ends, and the end head of each lifting arm end is separately provided with a lifting lug. A framework plate is separately fixed between the side surfaces of the lifting arm ends of every two adjacent support plates. In the invention, the perpendicular lifting heat treatment of a certain large solid rocket engine shell is realized, the heat treatment of the solid rocket engine shell is finished in a pit furnace of which the furnace opening diameter is 200mm larger than the diameter of the metal shell, and both the mechanical properties and the size of the engine shell meet design index requirements after heat treatment. Besides, after heat treatment, the tool is free of deformation and can be repeatedly used.

Description

technical field [0001] The invention relates to the field of tooling, in particular to a tooling for heat treatment of solid rocket motor shells with a diameter of ≥2500mm. Background technique [0002] In order to make high-strength steel and ultra-high-strength steel exert high strength and excellent plasticity and toughness requirements, these materials usually need to be heat-treated to exert the excellent performance of the material itself. In order to meet the requirements of use, the solid rocket motor casing made of ultra-high-strength steel also needs to be quenched and tempered in the end. There are many difficulties in the development process of the currently developed solid rocket motor shell (diameter ≥ 2500mm). During the heat treatment process, since it is a metal thin-walled shell, in order to avoid deformation during the heat treatment process, it must be hung vertically for heat treatment. Therefore, reasonable heat treatment tooling must be designed. Di...

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Problems solved by technology

[0005] 3. The diameter of the furnace mouth of the domestic heat treatment furnace that meets the heat treatment requirements of the shell is only 200mm larger than the shell diameter of the solid rocket motor, which greatly improves the size control requirements of the tooling

[0006] Due to the existence of the above problems, domestic existing tooling such as figure 1 As shown, it is the existing solid rocket motor shell heat treatment tooling, in which the side ribs and the columns are directly connected by welds, the strength is not high, and only two lifting lugs are connected to the process lifting rings, and the maximum outer diameter of the tooling structure is Much larger than the outer diameter of the engine casing, it is no longer suitable for heat treatment of large solid rocket motor casings (diameter ≥ 2500mm)

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