Steel plate butt welding method

A welding method and steel plate technology, applied in welding equipment, welding/welding/cutting items, arc welding equipment, etc., can solve the problems of difficult welding operation, difficult precise positioning, and narrow operating space, so as to improve welding quality and guarantee Welding quality, the effect of solving the stress concentration at the root of the weld

Active Publication Date: 2015-07-29
YANTAI RAFFLES SHIPYARD +3
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

This traditional processing method first affects the aesthetics, and the most important defect is that the operation space is narrow due to the small angle between the two plates, so the welding operation is difficult; and the precise positioning is also very difficult to meet the requirements; in addition The bottom weld bead must be welded with a thin electrode to prevent burn-through, and a large amount of deposited metal is required to fill the weld, and stress concentration is easily formed at the root of the weld, which affects the welding quality

Method used

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Embodiment approach 1

[0030] Such as figure 1 As shown, an embodiment of the steel plate butt welding method of the present invention is used to butt weld the first steel plate 10 and the second steel plate 20 together. In this embodiment, the first steel plate 10 is a rib plate with a thickness of 25 mm and a grade of ABS-A, the second steel plate 20 is a bottom plate with a thickness of 14 mm and a grade of ABS-B, and the rib plate is required The angle α between the ship's bottom plate and the ship's bottom plate is 73° as an example for illustration.

[0031] Of course, in other embodiments, the thickness of the first steel plate 10 and the thickness of the second steel plate 20 may be the same, and the grades may also be the same. The angle between the first steel plate 10 and the second steel plate 20 can also be adjusted as needed, for example, the angle α between the first steel plate 10 and the second steel plate 20 is between 15° and 90°, even lower than 15°. ° such as 10 ° ~ 14 ° is al...

Embodiment approach 2

[0049] Such as figure 2 As shown, the difference between the second embodiment of the steel plate butt welding method of the present invention and the first embodiment only lies in:

[0050] The thickness of the bottom plate 20 and the rib plate 10 is relatively thin, for example, the thickness is less than 16mm. Therefore, in the bevel processing step S2, the bottom plate 20 and the rib plate 10 can be machined with a beveling machine to form a "V"-shaped bevel.

[0051] Other steps of the second embodiment of the butt welding method are basically the same as those of the first embodiment, and will not be repeated here.

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Abstract

The invention discloses a steel plate butt welding method for butt welding of a first steel plate with certain thickness and a second steel plate with certain thickness. The method comprises the steps of transition structure providing; chamfering: chamfering the ends of the first steel plate and the second steel plate to be welded to form slopes; location: locating the first steel plate, the second steel plate and the transition structure to enable a required angle to be formed between the first steel plate and the second steel plate and enable the transition structure to be located between the first steel plate and the second steel plate; first steel plate welding: welding the first steel plate and the transition structure; second steel plate welding: welding the second steel plate and the transition structure. According to the method, the welding is simple to perform, the quality is good, and the method is applicable to butt welding among small-angle steel plates.

Description

technical field [0001] The invention relates to a butt welding method for plates, in particular to a butt welding method for small-angle steel plates. Background technique [0002] At present, in various construction processes, such as the construction of ships and offshore platforms, due to the needs of design and ship type, there will be a demand for butt joint assembly of plates at relatively small angles (such as 15° to 90°). [0003] The traditional method is to weld the two steel plates on one side first after positioning the two steel plates precisely; This traditional processing method first affects the aesthetics, and the most important defect is that the operation space is narrow due to the small angle between the two plates, so the welding operation is difficult; and the precise positioning is also very difficult to meet the requirements; in addition The bottom weld bead must be welded with a thin electrode to prevent burn-through, and a large amount of deposited...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/02B23K9/235B23K33/00B23K101/16
CPCB23K9/0203B23K9/235B23K33/00B23K2101/16
Inventor 张国华符洋苏文龙王加力
Owner YANTAI RAFFLES SHIPYARD
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