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

A technology of milling and changing wall thickness, applied in the direction of expanding the mandrel, etc., can solve the problem of low machining accuracy, and achieve the effects of uniform force on the product, small tooling error, and improved rigidity and machining accuracy.

Inactive Publication Date: 2016-03-30
XIAN AEROSPACEMOTOR MACHINE FACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to overcome the disadvantages of low processing precision in the prior art, the p

Method used

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

Examples

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Embodiment 1

[0031] This embodiment is an inner brace used for milling at the thickened annular zone of a φ750×δ3×1450 thin-walled cylinder. The wall thickness at the thickened ring is 6 mm, and the distance from one end of the cylinder is 38 mm. There is a 218° weight-reducing belt along the circumferential direction at the thickened ring, and the wall thickness of the weight-reducing belt is required to be

[0032]The inner brace includes a mandrel 1, a limit block 2, an outer arc block 3, an inner cone block 4, a conduction plate 5, an outer hexagonal large nut 8 and a sleeve. Wherein: the bottom end of the mandrel 1 has a base, the lower end of the mandrel has a radially protruding annular baffle, and the distance between the upper surface of the base and the lower surface of the annular baffle is the same as that of the limit block 2 The thickness is the same; the outer peripheral surface of the upper end of the mandrel 1 is a threaded surface. The limiting block 2 is sleeved on t...

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PUM

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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...

Claims

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Application Information

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IPC IPC(8): B23B31/40
CPCB23B31/4073
Inventor 闫飞宇陈文会马延枫李俊峰宋鑫曲中兴刘强陈刚陈榕谢勇智刘琦穆为迎苗金龙赵润辉王蕾袁伟王振波张立平白文怡张杨孟继东
Owner XIAN AEROSPACEMOTOR MACHINE FACTORY
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