Adaptive turning tool and method for integral spinning box bottom

Abstract

The invention provides a cutting tool and method for self-adaptive turning of the integral spinning box bottom, comprising: a cutting tool body (1), a casing (2), a first front stopper (3), a second front stopper ( 4), fastening nut (5), spring (6), mandrel (7), adjustment block (8), rear stopper (9) and mounting bolt (10). The self-adaptive processing of the profile under the condition of poor profile and roundness of the overall spinning box bottom of the launch vehicle is realized, and the occurrence of overcutting is avoided. By keeping the critical horizontal component constant as the optimization goal, the actual feed rate The amount is optimized for the optimization object to ensure that the actual horizontal component force F of the cutting tool body (1) is 水平合力 and depth of cut a p will exhibit a fixed proportional or univariate relationship, when the depth of cut a p greater than the critical depth of cut a plim When the cutting tool body (1) retreats automatically, self-adaptive processing is realized without overcutting.

Description

technical field [0001] The invention relates to the technical field of carrier rocket storage tank manufacturing, in particular to a cutting tool and method for integral spinning tank bottom self-adaptive turning. Background technique [0002] The bottom of the launch vehicle storage tank is a typical large-scale rotary thin-walled shell structure. The manufacturing process of the domestic launch vehicle storage tank bottom is to use multiple pieces of melon petals and top cover for joint welding. It is formed by chemical milling in the part state, as can be seen in Chinese patent CN109798203B for details. [0003] In recent years, with the development and application of sheet metal spinning technology, the overall spinning of the bottom of the launch vehicle can be realized in engineering applications. Due to the differences in spinning process methods and the requirements of design indicators, it is necessary to complete the overall spinning of the bottom of the box. Mach...

AI Technical Summary

Problems solved by technology

[0004] 1. The diameter of the bottom of the overall spinning box of the launch vehicle is equivalent to the diameter of the storage tank, at least 3350mm. At present, the size of the chemical milling reaction tank is difficult to meet the requirements;

[0005] 2. The new generation of launch vehicles are all green rockets, and chemical milling is a polluting process, which does not meet the current requirements of environment-friendly industries, and belongs to the process of controlled use and replacement;

[0006] 3. The machining process is one of the optional processes for the thinning area. However, due to the large error in the roundness and contour of the profile after spinning, turning according to the theoretical contour curve will directly lead to the scrapping of the bottom of the box due to overcutting. It is also difficult to apply

[0007] In view of a series of problems such as narrow applicability, unfriendly environment, and high processing difficulty in the above processes, it is imminent to introduce a processing tool and method that combines quality, efficiency, and cost.

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