CN111730171B

CN111730171B - Welding liner suitable for corner joint and welding method

Info

Publication number: CN111730171B
Application number: CN202010638047.6A
Authority: CN
Inventors: 牛群; 李毅; 张步亭; 卢小军; 张逊焘; 王宏伟
Original assignee: China Construction Steel Structure Tianjin Corp Ltd
Current assignee: China Construction Steel Structure Tianjin Corp Ltd
Priority date: 2020-07-07
Filing date: 2020-07-07
Publication date: 2022-02-15
Anticipated expiration: 2040-07-07
Also published as: CN111730171A

Abstract

The invention relates to the technical field of welding tools, in particular to a welding liner and a welding flux method suitable for an angle joint, wherein the welding liner comprises the following components: the welding device comprises an elastic supporting structure and a fixed structure, wherein the elastic supporting structure is suitable for being arranged at reverse groove positions of two workpieces to be welded to support welding fluxes filled in the reverse groove positions, the fixed structure is connected with the elastic supporting structure through a connecting structure, and the fixed structure is provided with a mounting surface used for being detachably connected with the two workpieces to be welded. The invention provides a welding pad which is firmly connected with a workpiece to be welded and is suitable for an angle welding joint and a welding method.

Description

Welding liner suitable for corner joint and welding method

Technical Field

The invention relates to the technical field of welding tools, in particular to a welding liner suitable for an angle joint and a welding method.

Background

The full penetration welding technology adopts manual welding or submerged arc welding for backing, and then the branch surface adopts a carbon arc gouging back chipping method, the method can bring the environmental pollution of arc light, smoke dust, noise and the like when the carbon arc gouging back chipping is adopted, the body of a worker is greatly damaged, the longest working time of the worker in the back chipping working position cannot exceed one year, otherwise, the deafness can be caused; in addition, workers are easy to suffer from pneumoconiosis due to overlarge smoke dust during back chipping; when carbon arc gouging is adopted for back chipping, a large amount of manpower, equipment and the like are consumed, and the filling amount and energy consumption of part of welding materials are increased; when the carbon arc gouging is adopted for back chipping, large deformation of a welding component and change of a metallographic structure are easily caused due to large heat input; and forming an oxide layer on the surfaces of the welding meat and the base material after the air gouging, and polishing for the second time.

Therefore, the prior art discloses a submerged arc welding full penetration non-back-gouging welding method, which comprises the following steps: adjusting the gap of the welding seam; sticking a substrate without back gouging on the back of the welding line; adopting submerged-arc welding to weld a seam for backing welding; and after backing welding is finished, removing the substrate which is not provided with the back gouging and is stuck, and welding the welding seam after the backing welding by adopting submerged arc welding until the full penetration welding of the welding seam is finished. The fast-pasting anti-burning material layer is directly pasted on the edge of the welding seam, and is easy to separate from the welding seam under the action of the gravity of the welding flux and the filler, so that the welding effect is influenced.

Disclosure of Invention

Therefore, the technical problem to be solved by the invention is to overcome the defect that the welding seam is easy to separate without back chipping of the substrate and the welding effect is influenced in the prior art, so that the welding gasket which is firmly connected with a workpiece to be welded and is suitable for the fillet weld joint and the welding method are provided.

In order to solve the above technical problem, the present invention provides a welding pad suitable for a fillet joint, comprising:

the elastic supporting structure is suitable for being arranged at reverse groove positions of two workpieces to be welded to support the welding flux filled at the reverse groove positions;

and the fixing structure is connected with the elastic supporting structure through a connecting structure and is provided with a mounting surface for being detachably connected with the two workpieces to be welded.

The welding gasket suitable for the angle joint comprises a support and an adsorption layer arranged on the outer surface of the support.

The welding gasket suitable for the angle joint is characterized in that the adsorption layer is a magnet layer or an adhesive layer.

The welding liner suitable for the angle joint, support piece include a pair of backup pad that sets up in opposite directions with locate a pair of stiffening rib between the backup pad, the adsorbed layer is located the surface of backup pad.

The welding liner suitable for the angle joint comprises a heat insulation layer and an elastic net, wherein the heat insulation layer is arranged in contact with a welding flux, and the elastic net is arranged outside the heat insulation layer.

The welding liner suitable for the angle joint, the heat insulating layer is quartz wool, and the elastic net is a steel net.

The welding gasket is suitable for the angle joint, and the connecting structure is hinged with the fixing structure.

The welding gasket suitable for the angle joint comprises a rod piece fixed with the elastic supporting structure and a hinge piece arranged at the other end of the rod piece.

The welding gasket is suitable for the angle joint, the hinged part comprises a support arranged on the fixed structure and a hinge arranged on the support in a penetrating mode, and the hinge is connected with the other end of the rod piece.

There is also provided a welding method comprising the steps of:

filling welding flux in reverse grooves of two to-be-welded workpieces which are tightly propped against each other, then installing the elastic supporting structure below the welding flux, simultaneously enabling the installation surface of the fixed structure to be detachably connected with the two to-be-welded workpieces, and then carrying out backing welding on a welding line by adopting submerged arc welding.

The technical scheme of the invention has the following advantages:

1. according to the welding gasket suitable for the angle joint, the elastic supporting structure is arranged at the reverse side grooves of the two workpieces to be welded, and the elastic supporting structure has elasticity, so that the elastic supporting structure can be completely attached to the reverse side grooves and can play a certain supporting role on fillers in the reverse side grooves; meanwhile, the mounting surface of the fixing structure is detachably connected with the two workpieces to be welded, so that the contact area of the fixing structure and the workpieces to be welded is increased, and the connection firmness is improved.

2. According to the welding gasket suitable for the angle joint, the heat insulation layer can prevent the flux from overflowing from the elastic net, and can block high temperature and prevent the elastic net from losing elasticity or melting when being heated; the elastic deformation of the elastic net can support the self weight of the welding flux and compact the welding flux.

3. According to the welding gasket suitable for the angle joint, the adsorption layer is the magnet layer or the bonding layer, so that the welding gasket can be repeatedly used, and the cost is reduced.

4. The invention provides a welding gasket suitable for an angle joint.A connecting structure is hinged with a fixing structure. Therefore, when the sizes of the reverse grooves between the two workpieces to be welded are different, the position of the fixing structure can be adjusted through the connecting structure, so that the reliable connection between the fixing structure and the workpieces to be welded is ensured.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a front view of a weld pad suitable for use in a corner joint provided by the present invention;

FIG. 2 is a right side view of FIG. 1;

fig. 3 is a schematic view of a soldering pad in use.

Description of reference numerals:

1. a workpiece to be welded; 2. welding flux; 3. a thermal insulation layer; 4. an elastic net; 5. an adsorption layer; 6. a support plate; 7. a stiffening rib; 8. a kidney-shaped hole; 9. a rod member; 10. a hinge member.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

One embodiment of the welding gasket suitable for the corner joint shown in fig. 1 to 3 is used for submerged arc backing full penetration welding of a thick plate with a double-sided bevel, and comprises an elastic supporting structure, a fixing structure and a connecting structure for connecting the elastic supporting structure and the fixing structure.

The elastic supporting structure is arranged at the reverse groove parts of the two workpieces to be welded 1 to support the welding flux 2 filled in the reverse groove parts. The elastic supporting structure comprises a heat insulation layer 3 arranged in contact with the welding flux 2 and an elastic net 4 arranged outside the heat insulation layer 3. The thermal-insulating layer 3 is quartz cotton with the thickness of 5mm, the elastic net 4 is a steel net with the thickness of 1mm, and the quartz cotton and the steel net are bonded by strong glue. The areas of the quartz wool and the steel mesh are slightly larger than the cross sectional area of the reverse slope, so that the welding flux at the reverse slope is compacted after certain deformation occurs.

The fixing structure has a mounting surface for detachable connection with two of the workpieces 1 to be welded. The fixing structure comprises a support and an adsorption layer 5 arranged on the outer surface of the support. The support piece includes a pair of backup pad 6 that sets up in opposite directions and locates a pair of stiffening rib 7 between the backup pad 6, and backup pad 6 is the two backup pad that fold of 4mm thickness, and 4mm thick stiffening rib 7 is equipped with a plurality ofly along the extending direction of backup pad 6, and the shaping is isosceles trapezoid to form 90 contained angles between two backup pads, wait to weld vertical face and the horizontal plane contact of work piece 1 with two respectively. Stiffener 7 and backup pad 6 welding, and the shaping has waist type hole 8 on the stiffener 7, both can play the weight reduction effect, also can hold waist type hole 8, regard it as the handle, the dismouting of being convenient for. The adsorption layer 5 is a magnet layer or an adhesive layer with the thickness of 1mm and is adhered to the outer surface of the support plate 6 through strong glue. The magnet layer is rubber magnet, which has certain elasticity, is convenient for compacting the welding flux, prevents the welding flux from loosening under the action of gravity after the body is turned over, has no contact with the bottom of the groove, and has certain supporting strength.

The connecting structure is hinged with the fixing structure. The connecting structure comprises a rod piece 9 fixed with the elastic supporting structure and a hinge piece 10 arranged at the other end of the rod piece 9. The rod member 9 is a round steel rod, and one end of the round steel rod is welded with the elastic net 4. The articulated elements 10 comprise a support arranged on the fixed structure and a hinge arranged on the support in a penetrating way, and the hinge is connected with the other end of the rod piece 9. Under the action of the hinge, the angle between the round steel rod and the stiffening rib 7 is adjustable so as to be suitable for different reverse bevel angles.

As shown in fig. 3, before backing welding is performed on the workpieces 1 to be welded, the welding flux 2 is filled in the reverse grooves of the two workpieces 1 to be welded, and the aluminum foil is pasted at the two ends of the weld for plugging, so that the welding flux is prevented from flowing out. Then quartz wool and a steel mesh are installed below the welding flux 2, and the installation position of the fixing structure is adjusted through a hinge between the round steel rod and the stiffening rib 7 until the two rubber magnets are completely attached and fixed with the vertical surface and the horizontal surface of the two workpieces to be welded 1 respectively. And then backing welding is carried out on the welding seam by adopting submerged arc welding, after backing welding is finished, the welding liner arranged in a sticking way is removed, and the welding seam after backing welding is welded by adopting submerged arc welding until full penetration welding of the welding seam is finished. In the welding process, the submerged-arc welding can weld the groove edge through, at the moment, high-temperature molten iron flows from the filling welding flux below to block the flow, the welding flux can form a smooth and flat stone surface at high temperature, the appearance of the molten iron is ensured to be cooled and formed, namely, single-side welding and double-side forming are realized, the welding filling efficiency is high, carbon arc gouging and back chipping and secondary grinding are not needed, the working procedures are reduced, the cost is low, and the noise pollution, the light pollution and the dust pollution are reduced.

Alternatively, the elastic support structure may be a polymer synthetic plate having certain elasticity and heat insulation, such as an organic silicone rubber plate, an ethylene propylene rubber plate, a fluorine rubber plate, and the like.

As an alternative embodiment, the supporting member may be an integrally formed supporting block, and two opposite end surfaces of the supporting block are respectively fixed in contact with the surfaces of two workpieces to be welded, and may be fixed by means of a sliding rail and a sliding block, or may be fixed by means of a screw and a screw hole.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims

1. A welding pad suitable for use in a corner joint, comprising:

the elastic supporting structure is suitable for being arranged at reverse groove positions of two workpieces (1) to be welded to support the welding flux (2) filled in the reverse groove positions;

the fixing structure is connected with the elastic supporting structure through a connecting structure and is provided with a mounting surface for detachably connecting with the two workpieces (1) to be welded;

the fixing structure comprises a support and an adsorption layer (5) arranged on the outer surface of the support, the adsorption layer (5) is a magnet layer or a bonding layer, the support comprises a pair of support plates (6) arranged in opposite directions and a stiffening rib (7) arranged between the pair of support plates (6), and the adsorption layer (5) is arranged on the outer surface of the support plates (6);

elastic support structure includes insulating layer (3) and the location that sets up with welding flux (2) contact insulating layer (3) outer elastic mesh (4), insulating layer (3) are the quartz cotton, elastic mesh (4) are the steel mesh, connection structure with fixed knot constructs articulatedly, connection structure include with fixed member (9) of elastic support structure and locating articulated elements (10) of member (9) other end, articulated elements (10) are including locating last support of fixed knot constructs with wear to establish hinge on the support, the hinge with member (9) other end is connected.

2. A welding method, characterized in that welding is performed using the welding pad for a fillet joint according to claim 1, comprising the steps of:

firstly, filling welding flux (2) in reverse grooves of two workpieces (1) to be welded which are tightly propped against each other, then installing an elastic supporting structure below the welding flux (2), simultaneously enabling an installation surface of a fixed structure to be detachably connected with the two workpieces (1) to be welded, and then carrying out backing welding on a welding line by adopting submerged arc welding.