U-shaped ring for gas generator and its manufacturing process

Abstract

The invention provides a U-shaped ring for a gas producer and a manufacturing technology of the U-shaped ring, and belongs to the technical field of machining of U-shaped rings. A U-shaped ring body (1) is formed by bending and rolling an elongated steel plate and is provided with only one weld joint (2); and the longitudinal section of the U-shaped ring body (1) is U-shaped. An elongated steel plate which is made of a metal material is rolled into a ring by an edge rolling machine, and after the weld joint is welded, a planar ring of which the longitudinal section is a plane is obtained; the planar ring is heated by a heating punching machine, the heating temperature is 600-1000 DEG C, the longitudinal section of the planar ring is stamped into a U-shaped longitudinal section, and a U-shaped ring body (1) is formed; and the U-shaped ring body (1) is slowly cooled down in air until the temperature of the U-shaped ring body (1) is reduced to room temperature so as to obtain the U-shaped ring. The U-shaped ring is high in sealing property, high in strength and convenient to repair; and by the manufacturing technology of the U-shaped ring, the working time can be shortened obviously, the machining speed is increased, loss on leftover materials is avoided, and the cost is saved.

Description

technical field [0001] The invention belongs to the technical field of U-shaped ring processing, and in particular relates to a U-shaped ring for a gas generator and a manufacturing process thereof. Background technique [0002] In order to play a role of heat insulation, the existing gas generator is mostly designed as a double-layer structure of the inner wall and the outer wall, and the top and bottom ends of the inner wall and the outer wall are sealed by U-shaped rings, and then the gas generator is connected to the support . The existing U-shaped ring preparation process adopts cutting on a rectangular steel plate to obtain multiple identical fan-shaped components, placing multiple identical fan-shaped components on the same horizontal plane, splicing them into a ring, and welding the spliced ​​seams. A flat ring is formed, and then the flat ring is cold-rolled with a cold rolling mill to obtain a U-shaped ring. [0003] The U-shaped ring mainly plays the role of sea...

AI Technical Summary

Problems solved by technology

[0003] The U-shaped ring mainly plays the role of sealing the inner wall and the outer wall, but the sealing effect of the existing U-shaped ring is not ideal, and there are problems of difficult maintenance

The main reason is that the existing U-shaped ring is spliced ​​by multiple fan-shaped components. There are 3 or more seams on the U-shaped ring. The number of seams is too large, resulting in a decrease in the strength of the U-shaped ring.

When used on a gas generator, the working environment of the U-shaped ring needs to repeat the heating-cooling process repeatedly. The U-shaped ring of the existing structure has poor strength and cannot meet the demand.

After the U-shaped ring is used for a long time, the seam is easy to cause corrosion, which reduces the sealing performance of the U-shaped ring. However, due to too many welds, the existing U-shaped ring often cannot quickly find the leaking part during maintenance, resulting in maintenance. difficulty

[0004] Secondly, in the existing U-shaped ring production process, it is necessary to cut a plurality of fan-shaped components on a rectangular steel plate. Due to the irregular shape of the fan-shaped components, more steel plate scraps will be generated during the cutting process, resulting in waste. Increased production costs

Moreover, the existing U-shaped ring process takes a long time and has low production efficiency

The main reason is that it is difficult to obtain fan-shaped components by cutting them on the steel plate. The fan-shaped components need to be cut one by one. Welding takes a long time

The existing U-shaped ring is formed by cold pressing. When the U-shaped ring is applied to the gas generator, the temperature in the gas generator can reach up to 1000°C. The U-shaped ring needs to be used repeatedly in the working environment of heating and cooling. The strength of cold-formed U-rings cannot meet the demand, and the service life is short

After the U-shaped ring is installed on the gas generator and used, if the U-shaped ring needs to be replaced, the production must be stopped, resulting in economic losses

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