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Device and method for manufacturing metal bellows

A metal bellows and manufacturing device technology, which is applied in the field of metal bellows manufacturing devices, can solve problems such as low yield and easy occurrence of cracks, and achieve the effects of solving poor plasticity, reducing scrap, and short heating time

Inactive Publication Date: 2018-04-17
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Difficult-to-machine metal materials are prone to quality problems such as cracks under cold working conditions, and the yield is low

Method used

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  • Device and method for manufacturing metal bellows
  • Device and method for manufacturing metal bellows
  • Device and method for manufacturing metal bellows

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Embodiment Construction

[0025] Please refer to Figure 1 to Figure 3 As shown, the manufacturing device of the metal bellows of the present invention is composed of an upper mold base 1, a first seal 2, a mold 3, a heating wire 4, a lower mold base 5, a metal pipe 6, and a second seal 7, and the mold 3 is arranged on Between the upper mold base 1 and the lower mold base 5, and between the lower mold base 5 and the mold 3 are connected by bolts, the metal pipe 6 is arranged in the mold 3 and the upper and lower ends of the metal pipe 6 are respectively equipped with second seals 7 And the first sealing member 2, the upper end of the second sealing member 7 extends beyond the upper surface of the mold 3 and is connected with the upper mold base 1 by bolts, and the lower end of the first sealing member 2 exceeds the lower surface of the mold 3 And it is connected with the lower mold base 5 by bolts. A round hole (not marked) extending up and down is respectively arranged at the middle position of the f...

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Abstract

The invention discloses a manufacturing device and method for a metal corrugated pipe. The device comprises an upper die base, a first sealing piece, a die, a heating wire, a lower die base, a metal pipe and a second sealing piece. In the metal corrugated pipe manufacturing process, the metal pipe is sealed. The heating wire is utilized for heating the part, needing to deform, of a metal material hard to machine, the part of the metal material is softened, and plasticity is improved. Then, the metal pipe is inflated with inertia gas, the air pressure in the sealed metal pipe is increased, and the softened metal is attached to the die through the air pressure. According to the method, the thought of layering heating is adopted, the corrugated pipe part is heated circle by circle, and meanwhile material feeding is accompanied for forming of the corrugated pipe. After the corrugated pipe is formed, die opening is conducted, the corrugated pipe is taken out, and the corrugated pipe made of the metal material hard to form can be obtained. According to the method, the problems that the material hard to machine is poor in plasticity and not prone to forming in the normal temperature can be solved.

Description

Technical field: [0001] The invention relates to the manufacture of metal bellows, in particular to a manufacturing device and method for metal bellows. Background technique: [0002] Metal corrugated expansion joint is a component widely used in mechanical equipment and pipelines in modern industry. It can compensate the displacement changes brought by temperature and load to pipelines or tubular parts through its own elastic expansion and contraction, and can absorb mechanical vibration at the same time. . Therefore, metal wave expansion joints can effectively reduce the stress of pipes or tubular parts, thereby improving their service life. Among them, the metal bellows is the core component of the metal bellows expansion joint. Metal bellows is a thin-walled tubular part with transverse corrugations. It has both elastic characteristics and sealing functions. Its geometric characteristics enable it to withstand large deformations under the action of complex external for...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D15/10
CPCB21D15/10
Inventor 王辉李娟郭训忠严大伟
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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