CN-121977112-A - Bending splice welding square tube and welding process thereof

CN121977112ACN 121977112 ACN121977112 ACN 121977112ACN-121977112-A

Abstract

The invention discloses a bending splice welding square tube and a welding process thereof, and belongs to the technical field of square steel tube welding. The square tube comprises an upper welding assembly and a lower welding assembly which are identical in structure and are in butt joint and assembled to form a rectangular square tube structure, wherein the upper welding assembly and the lower welding assembly comprise a partition plate, side plates, triangular plates and L plates, positioning embedded grooves are distributed in the center of the partition plate at equal intervals, mounting protruding points are symmetrically distributed on two sides of the side plates and are connected with the positioning embedded grooves in a jogged mode, the L plates are bent ninety degrees along the center line of the long side and are provided with side plate positioning grooves, the mounting protruding points of the side plates are embedded into the side plate positioning grooves, the right-angle sides of the triangular plates are in butt joint and welded fixation with the side plates and the partition plate, and edge sealing point welding grooves are formed in two ends of the L plates and are used for welded fixation of the upper and lower assemblies. According to the invention, the bending and torsion resistance of the square tube is improved through the internal reinforcing structure, the internal fireproof and corrosion-resistant coating is realized through the split type splice welding structure, and the assembly efficiency is improved through the accurate positioning structure.

Inventors

ZHANG ZHAOMIN
ZHANG ZHAORUI
YAN LIHUA
XU QINGJUN
ZHANG YUEXIN
WU XIAOWEN

Assignees

智迈德股份有限公司

Dates

Publication Date: 20260505
Application Date: 20260227

Claims (7)

1. A bending and welding square tube is characterized by comprising an upper welding assembly (1) and a lower welding assembly (2), wherein the upper welding assembly (1) and the lower welding assembly (2) are assembled in a butt joint mode to form a rectangular square tube structure, the upper welding assembly (1) and the lower welding assembly (2) comprise a partition plate (4), side plates (3), triangular plates (5) and L plates (7), a plurality of positioning embedding grooves (401) are distributed at the center position of the partition plate (4) at equal intervals, a plurality of mounting protruding points (301) are symmetrically distributed at two sides of the side plates (3), the mounting protruding points (301) are connected with the positioning embedding grooves (401) in an embedding mode, the L plates (7) are symmetrically bent for ninety degrees along the center line of the long side of the L plates, a plurality of side plate positioning grooves (6) are distributed at the center of the bending position of the L plates (7) at equal intervals, the mounting protruding points (301) at one end of the side plates (3) far away from the partition plate (4) are embedded into the side plate positioning grooves (6), two right-angle sides of the partition plate (5) are respectively embedded into the side plate positioning grooves (3) and the two side edges of the partition plate (4) are fixedly provided with edge sealing grooves (201), the upper welding assembly (1) and the L plate (7) of the lower welding assembly (2) are fixed by welding through the edge sealing point welding groove (201).
2. The bending and welding square pipe according to claim 1, wherein the upper welding assembly (1) is in face-to-face butt joint with the partition plate (4) of the lower welding assembly (2), and the upper welding assembly (1) is in butt joint fit with the side edges of the two ends of the L-shaped plate (7) of the lower welding assembly (2) in the length direction.
3. The bending and welding square pipe according to claim 1, wherein the partition plate (4) and the side plate (3) are welded and fixed at the position of the positioning embedded notch (401), and the partition plate (4) and the L plate (7) are welded and fixed at the position of the side plate positioning notch (6).
4. The welding process of the bending and welding square tube is characterized by comprising the following steps of: The method comprises the steps of firstly, cutting and blanking a baffle plate (4) by laser, wherein a plurality of positioning embedding grooves (401) are distributed in the center of the baffle plate (4) at equal intervals; step two, cutting a blanking outlet side plate (3) by laser, wherein a plurality of mounting convex points (301) are symmetrically distributed on two sides of the side plate (3); Cutting and blanking a triangular plate (5) by laser, aligning and installing a positioning embedding slot (401) of the partition plate (4) with an installation convex point (301) of the side plate (3), and carrying out intermittent welding and fixing after two right-angle sides of the triangular plate (5) are respectively abutted and positioned with the side surfaces of the side plate (3) and the partition plate (4); welding and spot-fixing are carried out one by one along the positioning embedded grooves (401), and the partition plate (4) and the side plate (3) are welded and fixed; Cutting and blanking an L-shaped plate (7) by laser, symmetrically bending ninety degrees along the central line of the long side of the L-shaped plate (7), and arranging a plurality of side plate positioning notches (6) in the center of the bending position at equal intervals; Embedding a mounting salient point (301) at one end of the side plate (3) far away from the partition plate (4) into the side plate positioning notch (6), and performing intermittent welding and spot fixing to weld and fix the partition plate (4) and the L plate (7); welding and spot-setting are carried out one by one along the side plate positioning notch (6) to finish the assembly of the upper welding assembly (1); And step eight, repeating the steps one to seven to obtain a lower welding assembly (2), abutting the upper welding assembly (1) with the partition plate (4) of the lower welding assembly (2) face to face, and welding and fixing the edge joints of the L plates (7) one by one along edge sealing point welding grooves (201) formed in two sides of one L plate (7) to finish welding of the bending and welding square pipes.
5. The welding process of the bent and welded square pipe according to claim 4, wherein in the eighth step, when the upper welding assembly (1) is in butt joint with the lower welding assembly (2), the two ends of the two L plates (7) are in butt joint and fit synchronously in the length direction.
6. The welding process of the bending and welding square pipes, according to claim 4, is characterized in that in the eighth step, edge sealing point welding grooves (201) formed on two sides of the two L plates (7) are welded and fixed.
7. The welding process of the bending and welding square pipes according to claim 4, wherein in the third step, the triangular plate (5) has a right-angled triangle structure.

Description

Bending splice welding square tube and welding process thereof Technical Field The invention relates to the technical field of square steel pipe welding, in particular to a bending splice welding square pipe and a welding process thereof. Background The assembled heavy steel villa is used as a novel building form, and the main bearing structure of the assembled heavy steel villa is usually formed by H-shaped steel, I-shaped steel, square steel pipes, C-shaped steel and other sectional materials. The square steel pipe is widely applied to bearing members such as upright posts and beams due to the characteristics of symmetrical cross sections and regular appearance. However, the existing square steel pipe has the problem of insufficient local stability in practical application, compared with the wide flange H-shaped steel, the wall plate of the square steel pipe is relatively wide and thin, and under the action of pressure, particularly when the square steel pipe is used as a bearing column, the wall plate is easier to generate local buckling phenomenon, namely, the plate is subjected to bulging deformation before being integrally unstable, so that the bearing capacity and the safety performance of the structure are affected. In addition, the existing square steel pipe has the characteristic of good torsion resistance of a closed section, but the advantage is not outstanding in a beam member mainly bearing bending moment. The heat insulation material is directly wrapped outside the square steel pipe, so that a heat bridge effect is formed on the metal square pipe, a large amount of building energy is lost, dew condensation corrosion is easily caused under the environment with a large temperature difference, and the service life of a component and the energy saving performance of a building are seriously affected. Therefore, a new square steel pipe structure and a manufacturing process thereof are needed to solve the problems of poor local stability, incapability of coating and maintenance inside, and dew condensation corrosion of a heat bridge. Disclosure of Invention The invention aims to provide a bending splice welding square tube and a welding process thereof, so as to solve the problems in the prior art. The invention provides a bending splice welding square tube which comprises an upper welding assembly and a lower welding assembly, wherein the upper welding assembly and the lower welding assembly are assembled in a butt joint mode to form a rectangular square tube structure, the upper welding assembly and the lower welding assembly comprise a baffle plate, side plates, triangular plates and L plates, a plurality of positioning embedding grooves are distributed in the central position of the baffle plate at equal intervals, a plurality of mounting convex points are symmetrically distributed on two sides of the side plates and are connected with the positioning embedding grooves in an embedded mode, the L plates are symmetrically bent ninety degrees along the central line of the long sides of the L plates, a plurality of side plate positioning grooves are distributed in the center of the bending position of the L plates at equal intervals, the mounting convex points of one end of the side plates, far away from the baffle plate, are embedded into the side plate positioning grooves, two right-angle sides of the triangular plates are respectively abutted against the side plates and the side surfaces of the baffle plate and are welded and fixed in a welding mode, edge sealing point welding grooves are formed in the side edges of the length direction of the two ends of the L plates, and the upper welding assembly and the L plates of the lower welding assembly are welded and fixed through the edge sealing point welding grooves; According to the technical scheme, the square tube structure is designed into a form formed by butt joint and assembly of the upper welding assembly and the lower welding assembly, the partition plates are arranged in the square tube to serve as supporting and reinforcing structures, and the square tube structure is connected with the partition plates in a matched mode through the side plates and the triangular plates, so that the overall rigidity and the bending and torsion resistance of the square tube are effectively improved, and the problem of local buckling of a traditional square steel tube wall plate is solved. Meanwhile, the positioning and embedding slot and the mounting convex point are precisely matched, and the embedded connecting structure of the side plate positioning slot and the mounting convex point realizes efficient and precise assembly between the components, and ensures welding quality and structural stability. In addition, the split type splice welding structure enables the inner surface of each component to be subjected to fireproof and anti-corrosion coating treatment before assembly of the square tube, so that the problem that the inside of the traditional clos