Super-thick plate splicing method

A seam and deck technology, applied in welding equipment, metal processing equipment, manufacturing tools, etc., can solve the problems of uneconomical, time-consuming, high cost, etc., and achieve the effect of reducing economic costs and saving time

Inactive Publication Date: 2019-07-09
SHANGHAI WAIGAOQIAO SHIP BUILDING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This splicing method is time-consuming and laborious, and takes up a lot of hoisting and turning equipment, which is costly and uneconomical
Even so, it is difficult to ensure the flatness of the crack arrest steel after welding according to this method, and it will usually cause the steel plate to warp, and the warpage range is 30mm-50mm
[0006] To sum up, for splicing crack arrest steel with a thickness of 45mm-85mm, there is currently no method that can not only ensure the welding quality, reduce welding deformation, but also reduce the number of times of turning over during the splicing process.

Method used

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Effect test

Embodiment 1

[0088] Such as figure 1 As shown, this embodiment discloses a method for splicing super-thick plates. This method is used for the welding of crack arresting steel on ships, and the method for super-thick plate splicing includes the following steps:

[0089] Step S1: An X-shaped bevel is made at one end of the super-thick board for splicing, and after completion, the super-thick board is placed on a flat tire frame to complete the butt joint of the super-thick board. Different super-thick boards The butt joints of the thick plates form a seam, the upper side of the ultra-thick plate is the first surface, and the lower side of the ultra-thick plate is the second surface;

[0090] Step S2: raising the seam, the second surface of the super-thick plate on both sides of the seam extends to the plane where the seam is located to form an intersection line, and the intersection line and The distance between the tire frames is a first distance, and the size of the first distance is ad...

Embodiment 2

[0098] Such as Figure 2-9 As shown, this embodiment discloses the specific implementation of applying the present invention to the welding of super-thick plates of ships.

[0099] figure 2 It is a schematic diagram of the structure of the torsion box area of ​​a container ship. The thickness of the ultra-thick plate included in the torsion box is 45mm-85mm, and the material of the ultra-thick plate is crack stop steel. Longitudinal bulkhead of torsion box 2, shell plate of torsion box 3, hatch coaming top plate 4 and upper deck of torsion box 5. The thickness range of the hatch coaming 1, the longitudinal bulkhead 2 of the torsion box, the shell plate of the torsion box 3 and the hatch coaming top plate 4 is 50mm-85mm, and the thickness of the upper deck 5 of the torsion box is 45mm-85mm.

[0100] Such as Figure 3-5 As shown, it is a schematic diagram of super-thick plate transverse splicing. The method of the present invention will be described in detail below.

[010...

Embodiment 3

[0115] Such as Figure 10 As shown, this embodiment discloses the specific implementation of applying the present invention to the welding of super-thick plates of ships.

[0116] This embodiment 3 is basically the same as embodiment 2, the difference is:

[0117] Embodiment 3 is the splicing of the longitudinal splicing seam T of the ultra-thick plate. When welding the longitudinal seam T, since the length of the longitudinal seam T is relatively long, it is necessary to arrange a plurality of jacks 9 below the seam T to ensure the smoothness of the seam T. The first distance C1 and the second distance C2 of the first steel plate 101 and the second steel plate 102 are different from the first distance C1 and the second distance C2 of the transverse splicing seam S of the super-thick plate. Specifically, when splicing the longitudinal seam T, the first distance C and the second distance C2 between the longitudinal bulkhead 2 of the torsion box and the shell plate 3 of the to...

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Abstract

The invention discloses a super-thick plate splicing method. The method comprises the following steps that S1, an X-shaped notch is formed in super-thick plates, and butt-joint of the super-thick plates is completed; S2, the splice joint height is adjusted, and a first distance is made to meet requirements; S3, welding on the upper side surface of a splice joint is completed; S4, the super-thick plates are overturned; S5, the splice joint height is adjusted, and a second distance is made to meet requirements; and S6, welding on the super-thick plates is completed. According to the super-thickplate splicing method, by propping up the splice joint, the thicknesses of the super-thick plates are adjusted, different reverse deformation heights are arranged for different super-thick plates, andpre-set reverse deformation is adsorbed by heat shrinkage produced after welding. Meanwhile, pressing blocks are used for pressing the super-thick plates after the super-thick plates are overturned,and post welding deformation is further controlled. According to the super-thick plate splicing method, on the premise that the welding quality of the super-thick plates is guaranteed, the purpose that welding can be completed after the super-thick plates are overturned for one time is achieved, the splicing time is saved, and the splicing cost for the super-thick plates is lowered.

Description

technical field [0001] The invention belongs to the technical field of steel plate splicing, and in particular relates to a method for splicing super-thick plates. Background technique [0002] Ultra-thick plate crack arrest steel is often used in the manufacturing process of large ships, especially in the 20000TEU torsion box area. The thickness of the ultra-thick plate crack arrest steel in this area is usually between 45mm and 85mm. The ultra-thick plate crack arrest steel has high toughness, thereby preventing the steel plate from cracking and improving the safety of the ship in the waves. At the same time, the construction requirements of the crack arrest steel are also very strict. The crack arrest steel can only be heated twice before welding, and the carbon explosion can only be corrected once during welding. The backburning temperature of the crack arrest steel cannot exceed 900 ° C . In order to prevent weld cracks, the crack arresting steel cannot be turned over...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K31/02
CPCB23K31/02
Inventor 冯敏超沈峰蔡金裕陈风王冠周庆一
Owner SHANGHAI WAIGAOQIAO SHIP BUILDING CO LTD
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