High precision spinning forming method for thin wall closing head with radius-thickness ratio less than three per mille

A technology of spinning forming and aspect ratio, which is applied in the field of spinning forming of the head, can solve the problems of large size of the head, high dimensional accuracy requirements, and short production cycle.

Inactive Publication Date: 2006-02-08
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the size of the head on the spacecraft is large, the wall thickness is thin, the dimensional accuracy is high, and the forming is difficult, especially the thin-walled head with a thickness-to-diameter ratio of less than 3‰ is more difficult to spin. To solve

Method used

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  • High precision spinning forming method for thin wall closing head with radius-thickness ratio less than three per mille
  • High precision spinning forming method for thin wall closing head with radius-thickness ratio less than three per mille
  • High precision spinning forming method for thin wall closing head with radius-thickness ratio less than three per mille

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specific Embodiment approach 1

[0005] Specific implementation mode one: (referring to Fig. 1~ Image 6 ) The present embodiment is realized through the following steps: one, the selection of mandrel 1: the material of mandrel 1 is selected the very high carbon steel or tool steel of strength and hardness, and one end of mandrel 1 is plane 8, mandrel 1 The other end of the head is a deep dish-shaped surface 9 whose shape is consistent with the internal shape of the head. There is a tapered blind hole 10 in the center of one end of the flat surface 8. This tapered blind hole 10 is matched with the spindle of the spinning machine. The tapered blind hole At least two threaded blind holes 11 and one avoidance blind hole 12 are evenly distributed around 10. The threaded blind hole 11 is used to fix the spindle of the spinning machine, and the avoidance blind hole 12 is used to avoid the bolt on the spindle. The position is the same as that of the bolt on the spindle. Consistent; the top of the deep dish-shaped su...

specific Embodiment approach 2

[0006] Embodiment 2: In this embodiment, the material of the slab 2 is aluminum alloy. Other methods and specific

Embodiment approach 1

[0007] Embodiment 1 is the same.

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Abstract

The invention relates to a thin-walled closure head high accuracy spinning forming method. The invention is to resolve the problem of big size closure head, thin wall thickness, high accuracy size and high difficulty of forming. Spinning machine is started to make rolling wheel do axial and circumferential movement along track loaded into program in head while spinning, meanwhile main axle of spinning machine drives core and bar plate to spin. When rolling wheel rolls to the distance of 20mm from edge it quits. The invention has the advantages of simple process and high accurate product.

Description

technical field [0001] The invention relates to a spinning forming process of a head. Background technique [0002] The head is a key pressure-bearing part of various pressure vessels and storage tanks. Among them, thin-walled heads with a thickness-to-diameter ratio of less than 3‰ are mainly used in the lining of pressure vessels and storage tanks on spacecraft and large-scale pressure vessels. The forming process has an important influence on the pressure vessel manufacturing technology. Traditional pressure vessel heads are mostly produced by stamping method, which requires a large-tonnage, large-table hydraulic press and a complete set of large molds, which is not suitable for the single-piece, small-batch and multi-variety production characteristics of aerospace pressure vessel heads. Therefore, since the 1960s, foreign countries have mostly used the spinning method to produce various heads. Because the size of the head on the spacecraft is relatively large compared ...

Claims

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Application Information

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IPC IPC(8): B21D22/16
Inventor 单德彬张艳秋徐文臣康达昌
Owner HARBIN INST OF TECH
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