Milling inner profile expanding tool of thin-wall variable-wall-thickness cylinder

Abstract

The invention relates to a milling inner profile expanding tool of a thin-wall variable-wall-thickness cylinder. Limiting blocks are arranged at the lower end of a mandrel in a sleeving manner and embedded between the upper surface of a base of the mandrel and an annular baffle of the mandrel, and an inner conical block is arranged on the mandrel in a sleeving manner. Outer arc blocks are arranged on the inner conical block in a sleeving manner, and the lower end faces of the outer arc blocks are arranged on the upper surfaces of the limiting blocks. A large outer hexagonal nut is arranged on the mandrel in a sleeving manner and attached to the upper end face of the inner conical block. A conduction disc is located on the upper surface of a locating disc at the lower end of the large outer hexagonal nut, and fixedly connected with the inner conical block through a screw. A sleeve is located above the mandrel, and an inner hexagon at the lower end of the sleeve and the large outer hexagonal nut match. The milling inner profile expanding tool is arranged in the spinning cylinder, and correction, rounding and clamping of the spinning cylinder can be achieved; the milling inner profile expanding tool has the beneficial effects that matching precision is high, tool errors are small, and product stress is even in the use process; the rigidity and machining precision of the cylinder are effectively improved; and the technical problems in thin-wall cylinder milling are solved.

Description

technical field [0001] The invention relates to the field of mechanical processing, in particular to a thin-walled and variable-thickness cylindrical milling inner brace. Background technique [0002] This part is one of the most important parts of a solid rocket motor casing, and is finally welded and assembled with other parts. The solid rocket motor has strict requirements on weight. Since the size and structure of other parts of the product are fixed and interchangeable, and the weight of the product is stable, the weight of the thin-walled cylinder will directly affect the weight of the solid rocket motor. [0003] The part belongs to thin-wall variable-thickness cylindrical parts, the cylinder adopts spinning forming technology, the inner diameter of the cylinder is Ф744, the wall thickness of the cylinder is 3mm~6mm, the total length of the cylinder is 1450mm, and the wall thickness near the two ends of the cylinder is 3mm. There is a thickened cylinder with a wall t...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the disadvantages of low processing precision in the prior art, the present invention proposes a thin-walled variable-wall-thick cylindrical milling inner-shaped brace

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