CN-121972885-A - Box girder reinforcement cage closed loop welding device and method

CN121972885ACN 121972885 ACN121972885 ACN 121972885ACN-121972885-A

Abstract

The invention relates to a box girder reinforcement framework closed loop welding device and method, wherein the box girder reinforcement framework closed loop welding device comprises a reinforcement butt welding machine, the reinforcement butt welding machine comprises a movable clamping seat and a fixed clamping seat, a butt welding area is formed between the movable clamping seat and the fixed clamping seat, the box girder reinforcement framework closed loop welding machine further comprises a positioning mechanism, the positioning mechanism comprises a positioning frame, a driving cylinder, racks, a side clamping seat, a front clamping seat and a rear clamping seat, a cylinder body of the driving cylinder is fixed on the positioning frame, the front end of the driving cylinder is provided with the driving seat, the racks are fixed on two sides of the driving seat, the racks are matched, positioned and sleeved on the positioning frame in a sliding manner, the racks on two sides are meshed with corresponding gears, a rotating shaft of the gears on two sides is in transmission connection with reverse threaded screw rods extending to two sides, the upper parts of the two sliding sleeves are provided with the side clamping seats, and form a side clamping area, and the front clamping seat and the rear clamping seat are corresponding to the outer side and the inner side of the butt welding area. The invention provides a positioning tool for the butt welding forming process of the rectangular steel reinforcement framework, and ensures the consistency and reliability of welding quality through a positioning and clamping system.

Inventors

HUANG QI
ZHANG PENG
XU BAOSHENG
WANG ZHENXING
LI JIANWEI
YIN HEJUN
SHU PENGFEI
YUAN JINBO
LIU BO
LIU JIANTAO
WU JINGJIANG
YAO BING
WANG QINGSHAN
LI XIANGDA
WANG GANG
ZHENG YUANXUN

Assignees

中建七局交通建设有限公司
中国建筑第七工程局有限公司
郑州大学
中建七局建设发展有限公司

Dates

Publication Date: 20260505
Application Date: 20260120

Claims (10)

1. The box girder steel reinforcement framework closed ring welding device comprises a steel reinforcement butt welding machine, wherein the steel reinforcement butt welding machine comprises a movable clamping seat and a fixed clamping seat, and a butt welding area is arranged between the movable clamping seat and the fixed clamping seat; the positioning mechanism comprises a positioning frame, a driving cylinder, racks, side clamping seats, a front clamping seat and a rear clamping seat, wherein a cylinder body of the driving cylinder is fixed on the positioning frame, the front end of the driving cylinder is provided with the driving seat, the racks are fixed on two sides of the driving seat, the racks are matched, positioned and sleeved on the positioning frame in a sliding manner, the racks slide under the action of the driving cylinder, the racks on two sides are meshed with corresponding gears, rotating shafts of the gears on two sides are in transmission connection with reverse threaded screws extending to two sides, sliding sleeves are in threaded connection with two different threaded sections of the reverse threaded screws, the upper parts of the two sliding sleeves are provided with the side clamping seats, and the two side clamping seats are matched and sleeved on the positioning frame to form side clamping areas; The front end of the driving seat is provided with a front clamping seat, the front clamping seat corresponds to the rear clamping seat and is respectively positioned at the outer side and the inner side of the butt welding area, and a corresponding clamping groove is arranged between the front clamping seat and the rear clamping seat.
2. The welding device for closed rings of the steel reinforcement framework of the box girder according to claim 1, wherein the front clamping seat and the rear clamping seat are correspondingly arranged at two sides of the butt welding area respectively.
3. The welding device for closed rings of the steel reinforcement framework of the box girder according to claim 1, wherein a rear adjusting cylinder is arranged at the rear side of the rear clamping seat so as to adjust the distance between the rear clamping seat and the front clamping seat.
4. The welding device for closed rings of the steel reinforcement frameworks of the box girders, as set forth in claim 1, wherein the clamping grooves are isosceles trapezoid grooves with large outer ends and small inner ends.
5. The welding device for closed rings of the steel reinforcement framework of the box girder according to claim 1, wherein the rear sides of the two racks are provided with reinforcing plates which are matched and sleeved on the driving cylinder in a sliding manner.
6. A method for welding a closed ring of a box girder steel reinforcement framework, which is applied to the device of claim 1, and is characterized by comprising the following steps of; Bending the steel bar to form a rectangular structure; Placing two sides of the rectangular reinforcement cage in side clamping areas on two sides, and placing rectangular edges with gaps between the front clamping seat and the rear clamping seat; Starting a driving cylinder, driving a front clamping seat to move backwards under the action of the driving cylinder, synchronously tightening a side clamping seat towards the middle part of a side clamping area by utilizing a rack, a gear and a reverse thread screw rod structure, and positioning two sides of a rectangular frame at a specific point; Step four, starting the cylinders at the upper parts of the movable clamping seat and the fixed clamping seat, enabling the upper clamping seat to move downwards, clamping the steel bars from the upper part, removing the front clamping seat and the rear clamping seat, starting the movable clamping seat, driving the steel bars to move inwards, and realizing butt welding of the steel bars; and fifthly, taking out the reinforcing steel bars after butt welding.
7. The welding device for the closed ring of the box girder steel reinforcement framework of claim 1, wherein the front clamping seat and the rear clamping seat comprise a fixed seat and a trimming seat, the fixed seat is fixed on the side of the fixed clamping seat, the trimming seat is slidably arranged on the side of the movable clamping seat and corresponds to the movable clamping seat, the trimming seat trims a tumor body generated by welding under the action of the movable clamping seat, the front clamping seat and the rear clamping seat are respectively arranged on the front driving seat and the rear driving seat, sliding grooves are formed in the front driving seat and the rear driving seat, the trimming seat is sleeved in the sliding grooves through sliding block fit sliding, the sliding block is sleeved on the sliding rod, a reset spring is sleeved on the sliding rod, and the sliding block is pressed on the reset spring.
8. The welding device for closed rings of the steel reinforcement frameworks of the box girders according to claim 7, wherein the clamping groove comprises an expansion section, a straight line section and a semicircle section, the semicircle section is matched with the steel reinforcement, and the expansion section is connected with the semicircle section through the straight line section.
9. The welding device for the closed rings of the steel reinforcement frameworks of the box girders according to claim 8, wherein the trimming seats on the front side and the trimming seats on the rear side are arranged in a staggered manner.
10. The method for welding the closed ring of the box girder steel reinforcement framework, which is applied to the device of any one of claims 7 to 9, is characterized by further comprising a trimming procedure, specifically comprising the following steps of; Step one, after the four butt welding is finished, starting an air cylinder above the movable clamping seat, keeping the fixed state of the fixed clamping seat, and moving the movable clamping seat to the side; Step two, the front clamping seat and the rear clamping seat move inwards and are clamped on the steel bars; Thirdly, the movable clamping seat moves inwards, the front clamping seat and the rear clamping seat are pushed from the side face, the front clamping seat and the rear clamping seat translate along the reinforcing steel bars, and the tumor body is trimmed; step four, after finishing, the movable clamping seat is reset, the front clamping seat and the rear clamping seat are reset by using springs, and finishing is completed; and fifthly, taking out the reinforcing steel bars.

Description

Box girder reinforcement cage closed loop welding device and method Technical Field The invention relates to the technical field of constructional engineering, in particular to a welding device and method for a closed loop of a box girder steel reinforcement framework. Background The box girder steel reinforcement framework is rectangular in structure, and in the welding forming stage, the rectangular structure is welded by adopting a pressure welding technology, and the mode leads to superposition of two joints at the joint, so that unnecessary material consumption is increased, resource waste is caused, and the structural integrity and the aesthetic property are also influenced by dislocation problems formed in the welding process. The butt welding of the steel bars means that two steel bars are connected in a welding mode so as to achieve the purpose of reinforcing the steel bars. The welding method mainly uses resistance heat or other heat sources to heat the end faces of the steel bars to a plastic state, and then applies pressure to connect the end faces of the steel bars together. The working principle of the butt welding machine is that the electrodes are respectively arranged on a fixed flat plate and a sliding flat plate, and the sliding flat plate can freely move on a guide rail. The current is transferred to the electrodes through the secondary winding of the transformer. When the pressure mechanism applies pressure to enable the ends of the two reinforcing steel bars to be in contact to form a short circuit, heat generated by the resistor heats the reinforcing steel bars, and when the reinforcing steel bars reach a high-plasticity state, additional extrusion force is applied to enable the two ends to be firmly butted to finish the welding process. Along with the increasing maturity of butt welding machine technique, although butt welding technique has been applied to the welding of rectangle frame, because of lacking accurate location structure in the implementation process, lead to the rectangle frame to need frequently carry out manual correction and fixed, showing reduced the efficiency of construction, increased intensity of labour, brought little puzzlement for the operating personnel. Based on the above, it is necessary to study a welding device and a method for sealing a box girder steel reinforcement cage into a ring. Disclosure of Invention In view of the above, the invention aims to provide a closed loop welding device and method for a box girder steel reinforcement framework, which effectively solve the problems of high positioning difficulty, low butt welding processing efficiency and poor butt welding precision caused by the lack of a positioning structure in butt welding of the existing rectangular steel reinforcement framework. The technical scheme is that the box girder steel reinforcement framework closed loop welding device comprises a steel reinforcement butt welding machine, wherein the steel reinforcement butt welding machine comprises a movable clamping seat and a fixed clamping seat, a butt welding area is formed between the movable clamping seat and the fixed clamping seat, and the box girder steel reinforcement framework closed loop welding device is characterized by further comprising a positioning mechanism, wherein the positioning mechanism comprises a positioning frame, a driving cylinder, a rack, a side clamping seat, a front clamping seat and a rear clamping seat; The front end of the driving seat is provided with a front clamping seat, the front clamping seat corresponds to the rear clamping seat and is respectively positioned at the outer side and the inner side of the butt welding area, and a corresponding clamping groove is arranged between the front clamping seat and the rear clamping seat. Further, the front clamping seat and the rear clamping seat are correspondingly arranged in two and are respectively positioned at two sides of the butt welding area. Further, a rear adjusting cylinder is arranged at the rear side of the rear clamping seat so as to adjust the distance between the rear clamping seat and the front clamping seat. Further, the clamping groove is an isosceles trapezoid groove with a large outer end and a small inner end. Further, the rear sides of the two racks are provided with reinforcing plates, and the reinforcing plates are matched with and sleeved on the driving cylinders in a sliding manner. A welding method for sealing a steel reinforcement framework of a box girder into a ring is applied to the device and comprises the following steps of; Bending the steel bar to form a rectangular structure; Placing two sides of the rectangular reinforcement cage in side clamping areas on two sides, and placing rectangular edges with gaps between the front clamping seat and the rear clamping seat; Starting a driving cylinder, driving a front clamping seat to move backwards under the action of the driving cylinder, synchronously tightening a side clamp