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Spherical box bottom circumferential seam welding method for 5M-grade thin wall storage box

A circular seam welding and super-thin-walled technology, which is applied in the field of circular seam welding at the bottom of spherical tanks with 5M thin-walled storage tanks, can solve the problems of scrapping the bottom of the tank, the inability to guarantee the stability of welding quality, and the inability to apply larger diameter storage tanks, etc. Achieve the effect of avoiding wrong seams and ensuring stability

Inactive Publication Date: 2015-05-20
CHINA ACAD OF LAUNCH VEHICLE TECH +2
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0002] The bottom of the rocket storage tank is generally hemispherical. The diameter of the existing storage tank is usually 3M or less. The existing welding tooling cannot be applied to the storage tank with a larger diameter due to the operation accuracy of the turntable and the limitation of the fixture. The storage tank suspension welding requirements cannot guarantee the stability of the welding quality, and sometimes even cause the bottom of the tank to be scrapped

Method used

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  • Spherical box bottom circumferential seam welding method for 5M-grade thin wall storage box
  • Spherical box bottom circumferential seam welding method for 5M-grade thin wall storage box
  • Spherical box bottom circumferential seam welding method for 5M-grade thin wall storage box

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Embodiment Construction

[0014] In order to make the object, technical solution and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0015] figure 1 Shown is a schematic structural view of the spherical tank bottom of the tank provided by the embodiment of the present invention. Such as figure 1 As shown, the upper end of the box bottom is composed of a plurality of melon petals of the same size that are tailor-welded to form a circular ring 3, the lower end of the box bottom is composed of a transition ring 2, and a circular seam 1 is formed between the circular ring 3 and the transition ring 2. By welding the ring seam 1, an integral box bottom is formed.

[0016] figure 2 Shown is a schematic flow chart of the welding method for the girth seam of the spherical bottom of the tank provided by an embodiment of the present invention. Such as figure 2 As shown, the metho...

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Abstract

The embodiment of the invention provides a spherical box bottom circumferential seam welding method for a 5M-grade thin wall storage box. The large-diameter storage box spherical box bottom circumferential seam welding quality is improved and the stability of the inner welding quality is ensured. The spherical box bottom circumferential seam welding method comprises the following steps: carrying out direct-current positioning welding on a connector points of each section of a circular ring and a circumferential seam, and a crossed point of the central line of each section and the circumferential seam; carrying out full positioning welding on the circumferential seam by using direct-current small current; carrying out suspended direct-current backing welding on the circumferential seam subjected to the full positioning welding; and carrying out cosmetic welding on a welding seam formed by adopting alternating-current large current, filling welding wires and carrying out the backing welding.

Description

technical field [0001] The invention relates to the field of rocket storage tank welding, in particular to a welding method for circular seam at the bottom of a spherical tank of a 5M-grade thin-walled storage tank. technical background [0002] The bottom of the rocket storage tank is generally hemispherical. The diameter of the existing storage tank is usually 3M or less. The existing welding tooling cannot be applied to the storage tank with a larger diameter due to the operation accuracy of the turntable and the limitation of the fixture. The storage tank suspension welding requirements cannot guarantee the stability of the welding quality, and sometimes even cause the bottom of the tank to be scrapped. [0003] For the welding of the bottom of the large-diameter storage tank of 5M grade (the ratio of aluminum alloy thickness to diameter is further increased), it has always been a difficult problem in the field of welding technology. Contents of the invention [0004]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/028B23K37/053
CPCB23K9/028B23K9/235B23K2101/12
Inventor 王国庆刘宪力白景彬宋建岭张中平韩国良刘延平王亚森
Owner CHINA ACAD OF LAUNCH VEHICLE TECH
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