A Composite Welding Method for Orthotropic Steel Bridge Deck U-rib K-type Joints
An orthotropic, composite welding technology, applied in the field of bridge manufacturing, can solve the problem that U-rib cannot achieve full penetration welding
Active Publication Date: 2021-07-30
中铁宝桥(扬州)有限公司 +1
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Problems solved by technology
[0004] Purpose of the invention: the present invention provides a method for full penetration welding of steel bridge U rib plates, which solves the problem that current U ribs cannot achieve full penetration welding
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Embodiment 1
[0022] Embodiment 1: as Figure 5-6 As shown, the straight edge of the U-rib is machined with the straight milling tool 4 to ensure the straightness of the U-rib, and then the two long sides of the U-rib 1 are processed with a milling cutter 5. The processed U-rib The bevel of the plate is as figure 1 As shown, the U rib groove is divided into inner groove 11, outer groove 12 and blunt edge 13. In this embodiment, when the thickness h of the U rib is 8mm, in order to ensure that the welding wire of the inner welding machine can be aligned with the root of the weld, And provide 0.5-1mm welding penetration, process inner groove depth h1 to 2mm, height d1 to 4mm, and inner groove processing angle to 62°; in order to ensure that the weld seam is well formed after the outer single-pass welding, at the same time, the 8mm U rib can be fully formed For penetration, the outer groove depth h2 is 5mm, the height d2 is 5mm, the outer groove processing angle is 45°, the blunt edge size p ...
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Abstract
The invention discloses a composite welding method for U-rib K-shaped joints of orthotropic steel bridge decks, which comprises the following steps: U-rib groove processing: processing two long-side grooves of the U-rib so that the U-rib has an inner groove and an outer groove Groove, after the groove processing is completed, press the shape; assemble and position the U rib on the bridge deck, and leave an assembly gap between the U rib and the deck; use gas shielded welding for the inner groove of the U rib; place the orthotropic plate on the opposite On the deformed tire frame, start the pressing device to clamp and reverse the deformation of the bridge deck, and then turn over the anti-deformation tire frame after compression; the outer groove of the U rib adopts automatic submerged arc welding; turn over the anti-deformation tire frame to complete the U rib Welding of the outside groove weld on the other side. The present invention has the advantages of simple groove processing, no need for root cleaning to achieve 100% full penetration of the weld between the U rib and the panel, beautiful welding shape, reliable weld performance, stable weld quality, small welding deformation, and high production efficiency.
Description
technical field [0001] The invention relates to the field of bridge manufacturing, in particular to a compound welding method for U-rib K-shaped joints of orthotropic steel bridge decks in the field of bridge manufacturing. Background technique [0002] With the widespread application of orthotropic steel decks, the fatigue problems of long-span, heavy-duty steel bridges during operation have attracted widespread attention in the industry. At present, the focus of research and development is the fatigue problem of orthotropic steel deck decks. To solve this problem, one of the methods adopted is: U-ribs and steel deck welds are designed with full penetration to prolong the fatigue life of orthotropic steel decks. fatigue life. [0003] Steel bridge orthotropic plates are used in many designs due to their unique characteristics of high rigidity, light weight, and convenient manufacturing and installation. The U-rib weld extension of a steel bridge orthotropic plate ranges fr...
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IPC IPC(8): B23K9/173B23K9/18B23K9/235
CPCB23K9/173B23K9/18B23K9/235
Inventor 李彦国朱新华刘志刚李硕张永利袁俊吴江波车平杜伟张海涛杨亮杨鸿涛
Owner 中铁宝桥(扬州)有限公司