CN114714028B - Welding protection device and welding method - Google Patents

Abstract

The application discloses welding protection device and welding method, connect the piece of blowing through coupling assembling in order to adjust the position of the relative welding seam back of the piece of blowing to utilize coupling assembling drive the piece of blowing, make the piece of blowing along the opening of first direction distribution can follow the moving direction synchronous motion of soldered connection, in the reverse extending direction along soldered connection moving direction, the volume of blowing that the piece of blowing blows to each position in the welding seam back increases gradually on the moving direction of soldered connection. Because along the reverse extending direction of soldered connection moving direction, the temperature of welding seam reduces gradually, along with the reduction of welding seam temperature, the activity that the welding seam takes place oxidation reaction also descends gradually, in order to improve protective gas's utilization efficiency in order to practice thrift protective gas, the gas output of the piece protective gas that blows also reduces gradually along the opposite direction with first direction, when having solved the back size of treating the welding position great, protective gas's utilization ratio is lower, needs the problem of a large amount of protective gas of consumption.

Description

Welding protection device and welding method

Technical Field

The application relates to the technical field of welding, in particular to a welding protection device and a welding method.

Background

In the existing material welding process, in order to avoid oxidation of the material due to temperature rise during welding, when a part to be welded is welded, protective gas is blown off from the front of the part to be welded, so that the welding part is prevented from being oxidized, meanwhile, oxidation also occurs on the back of the part to be welded due to the heat conduction effect of a welding seam, when the size of the back of the part to be welded is large, the existing gas protection device consumes a large amount of protective gas for protecting the back of the part to be welded, and meanwhile, the utilization rate of the protective gas is low.

Disclosure of Invention

The embodiment of the application provides a welding protection device and a welding method, and aims to solve the problems that when the size of the back face of a part to be welded is large, the utilization rate of protective gas is low, and a large amount of protective gas needs to be consumed.

The embodiment of the application provides a welding protection device, includes:

the device comprises an air blowing piece, a first cavity and a second cavity, wherein a first surface of the air blowing piece is provided with openings distributed along a first direction, the openings are communicated with the first cavity, the area of the openings in a unit length on the first surface is gradually increased in the first direction, and the surface of the air blowing piece is provided with an air inlet communicated with the first cavity;

and the connecting assembly is connected with the air blowing piece so as to drive the air blowing piece to move along the first direction.

Optionally, the air blowing pieces are sequentially arranged with a plurality of the openings along the first direction;

in the first direction, the number of the openings in the first surface per unit length is gradually increased, so that the area of the openings in the first surface per unit length is gradually increased;

and/or in the first direction, the aperture of the opening on the first surface is gradually increased, so that the area of the opening per unit length on the first surface is gradually increased.

Optionally, the opening extends along the first direction, and in the first direction, the width of the opening in a direction forming an included angle with the first direction gradually increases, so that the area of the opening per unit length on the first surface gradually increases.

Optionally, the blowing member extends arcuately along the first direction in an arc shape; alternatively, the first and second electrodes may be,

the air blowing member extends in a first direction in a plate shape.

Optionally, the connecting assembly includes a sliding rail and a limiting assembly, the sliding rail extends along the first direction, the air blowing piece is connected with the sliding rail in a sliding manner along the extending direction of the sliding rail, the limiting assembly is connected with the sliding rail, and the limiting assembly is used for being detachably connected with the piece to be welded.

Optionally, the air blowing member includes a second surface opposite to the first surface, the limiting assembly includes a guide rail extending along the second surface toward the first surface, the guide rail is used for connecting with the to-be-welded member, and the slide rail is slidably mounted on the guide rail; alternatively, the first and second electrodes may be,

the air blowing piece comprises a second surface opposite to the first surface, the air blowing piece and the slide rail are sequentially distributed along the direction from the second surface to the first surface, and the limiting assembly is connected to one side of the slide rail along the direction from the second surface to the first surface;

the slide rail comprises a first connecting surface, the first connecting surface of the slide rail is arranged opposite to the first surface of the air blowing piece, a through opening is formed in the position, corresponding to the opening of the first surface, of the first connecting surface of the slide rail, and the through opening extends along the length direction of the slide rail;

a second cavity extending along the extending direction of the slide rail is formed in the slide rail, and a water inlet and a water outlet which are respectively communicated with the second cavity are formed in the surface of the slide rail.

Optionally, the air blowing piece comprises a second surface opposite to the first surface, the connecting assembly comprises a rotating assembly and a support, the rotating assembly is rotatably connected with the support, the rotating assembly is connected with the air blowing piece to drive the air blowing piece to rotate, and an included angle is formed between a rotating axis of the air blowing piece and the first direction;

the part of blowing include with the relative second surface of first surface, the runner assembly is including being head rod and the second connecting rod that the contained angle is connected, the head rod with the support rotates to be connected, the extending direction of second connecting rod along the head rod orientation the direction on second surface, the second connecting rod with the part of blowing is connected, the second connecting rod includes first flexible portion and the flexible portion of second, first flexible portion with the head rod is the contained angle and connects, first flexible portion with the flexible portion of second along the extending direction sliding connection of second connecting rod, the flexible portion of second with the part of blowing is connected in order to drive the part of blowing along the extending direction telescopic movement of second connecting rod.

Optionally, the blowing part includes two end faces in the first direction, and the air inlet is opened on at least one of the end faces of the blowing part.

The embodiment of the application also provides a welding method, which comprises the following steps:

welding the front side of a welding seam of a piece to be welded through a welding head;

and blowing protective gas to a cooling section on the back of the welding seam through a blowing piece, and enabling the blowing piece and the welding head to move synchronously, wherein the cooling section extends from the welding head along the reverse direction of the moving direction of the welding head, and the blowing amount of the blowing piece to each position of the cooling section is gradually increased in the moving direction of the welding head.

Optionally, a first cavity is formed inside the blowing piece, openings distributed along a first direction are formed in a first surface of the blowing piece, the openings are communicated with the first cavity, in the first direction, the area of the openings in a unit length on the first surface is gradually increased, and an air inlet communicated with the first cavity is formed in the surface of the blowing piece; the air blowing piece is connected with a connecting assembly so that the connecting assembly drives the air blowing piece to move along the first direction; the cooling section of the back of the welding seam is blown with protective gas through a blowing piece, and the blowing piece and the welding head move synchronously, and the method comprises the following steps:

connecting the connecting assembly with the to-be-welded part, so that the opening of the air blowing part faces the back of the welding seam, and the first direction of the air blowing part is consistent with the extending direction of the welding seam;

communicating a gas inlet of the gas blowing member with a shielding gas supply pipe so that the opening blows shielding gas toward a cooling section of the weld;

the connecting assembly drives the blowing piece to move along the first direction, so that the blowing piece and the welding head move synchronously.

According to the welding protection device and the welding method, the connecting assembly is connected with the air blowing piece to adjust the position of the air blowing piece relative to the back face of the welding seam, the air blowing piece is driven by the connecting assembly, the openings of the air blowing piece distributed along the first direction can move synchronously along the moving direction of the welding joint, and the air blowing amount of the air blowing piece blowing to each position of the back face of the welding seam is gradually increased in the moving direction of the welding joint along the reverse extending direction of the moving direction of the welding joint. Because along the reverse extending direction of soldered connection moving direction, the temperature of welding seam reduces gradually, and along with the reduction of welding seam temperature, the activity that oxidation reaction took place for the welding seam also reduces gradually, in order to practice thrift protective gas in order to improve protective gas's utilization efficiency, blows a gas outlet quantity of protective gas and also reduces gradually along the opposite direction with first direction.

Drawings

The technical solutions and other advantages of the present application will become apparent from the following detailed description of specific embodiments of the present application when taken in conjunction with the accompanying drawings.

FIG. 1 is a schematic structural diagram of a first blowing member according to an embodiment of the present disclosure;

FIG. 2 is a schematic structural diagram of a second blowing member provided in an embodiment of the present disclosure;

FIG. 3 is a schematic structural view of a third blowing member provided in an embodiment of the present disclosure;

fig. 4 is a schematic structural diagram of a welding protection device according to an embodiment of the present disclosure;

FIG. 5 is a flow chart of a welding method provided by an embodiment of the present application;

a welding protection device 1000; a blowing member 100; a first cavity 110; a first surface 120; a second surface 130; an opening 140; an air inlet 150; a connecting assembly 200; a slide rail 210; a stop assembly 220.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. 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 application.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation of the first and second features not being in direct contact, but being in contact with another feature between them. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the application. To simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Further, the present application may repeat reference numerals and/or reference letters in the various examples for simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or arrangements discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.

The embodiment of the application provides a welding protection device 1000 and a welding method. The following are detailed below.

First, the embodiment of the present application provides a welding protection device 1000.

The welding protection device 1000 includes: an air blowing member 100, an air flow amount blown from the air blowing member 100 gradually increasing along a first direction of the air blowing member 100; and a connecting assembly 200 for driving the blowing member 100 to move in the first direction.

FIG. 1 is a schematic structural view of a first air-blowing member 100 according to an embodiment of the present disclosure; FIG. 2 is a schematic structural view of a second air-blowing member 100 according to an embodiment of the present disclosure; fig. 3 is a schematic structural diagram of a third blowing member 100 according to an embodiment of the present disclosure. As shown in fig. 1, fig. 2 and fig. 3, a first cavity 110 is formed inside the blowing member 100, the first cavity 110 is used for accommodating a shielding gas, the first surface 120 of the blowing member 100 is formed with openings 140 distributed along a first direction, the openings 140 distributed along the first direction are communicated with the first cavity 110, so that the shielding gas in the cavity can be blown out from the openings 140, in the first direction, the area of the openings 140 in a unit length on the first surface 120 is gradually increased, so that the flow rate of the shielding gas blown out by the openings 140 is gradually increased along the first direction, the surface of the blowing member 100 is formed with an air inlet 150 communicated with the first cavity 110, and the air inlet 150 is used for introducing the shielding gas, so as to exhaust the air in the cavity and provide the shielding gas for the blowing member 100.

The connecting assembly 200 of the welding protection device 1000 is connected to the gas blowing member 100, and the connecting assembly 200 is used for driving the gas blowing member 100 to move along a first direction.

Wherein, the first cavity 110 opened inside the air blowing member 100 may extend along the first direction. The linkage assembly 200 may drive the blow member 100 to move in a first direction curve.

Specifically, in the first direction, the area of the opening 140 per unit length on the first surface 120 may be the sum of all the areas of the opening 140 per unit length on the first surface 120. When the moving track of the air blowing member 100 is a circular arc, the rotating shaft of the air blowing member 100 may be disposed at an angle with respect to the first direction. The protective gas blown by the blowing member 100 may be an inert gas, and the inert gas may specifically be helium, argon, or the like. The weld protector 1000 may be used for back side weld protection for laser welding.

The application provides a welding protection device 1000, when the welding head is utilized to weld the front of the welding seam to be welded, the blowing piece 100 is connected through the connecting assembly 200 so as to adjust the position of the blowing piece 100 relative to the back of the welding seam, and the blowing piece 100 is driven by the connecting assembly 200, so that the opening 140 distributed along the first direction of the blowing piece 100 can move synchronously along the moving direction of the welding head, in the reverse extending direction along the moving direction of the welding head, the blowing amount of the blowing piece 100 blowing to each position on the back of the welding seam is gradually increased in the moving direction of the welding head, and the flow of the protective gas on the front of the welding seam relative to the back of the welding seam synchronously welded by the welding head is maximum.

Because the reverse extending direction along soldered connection moving direction, the temperature of welding seam reduces gradually, along with the reduction of welding seam temperature, the activity that oxidation reaction took place for the welding seam also descends gradually, in order to improve shielding gas's utilization efficiency in order to practice thrift shielding gas, the gas output of the piece of 100 shielding gas that blows also can reduce along the opposite direction of first direction gradually, the welding protection device 1000 that this application provided utilizes this principle, when having solved the back size of waiting to weld the position great, shielding gas's utilization ratio is lower, need consume a large amount of shielding gas's problem.

Alternatively, the gas blowing member 100 has a plurality of openings 140 sequentially arranged along the first direction so that the shielding gas blown from the plurality of openings 140 sequentially arranged along the first direction can cover a predetermined length of the back of the weld.

Wherein the predetermined length of the back of the weld is in a direction opposite to the first direction, and the temperature of the predetermined length of the back of the weld is gradually reduced to or below a minimum temperature at which oxidation of the weld can occur.

Specifically, the predetermined length may be 20 centimeters.

Alternatively, as shown in fig. 1 and fig. 2, in the first direction, the number of the openings 140 per unit length on the first surface 120 is gradually increased, so that the area of the openings 140 per unit length on the first surface 120 is gradually increased, and in the first direction, by increasing the density of the openings 140 per unit length, the air outlet amount of the openings 140 in the first direction is gradually increased;

and/or, in the first direction, the aperture of the opening 140 on the first surface 120 gradually increases, so that the area of the opening 140 per unit length on the first surface 120 gradually increases, and the air output of the opening 140 in the first direction gradually increases.

In the first direction, while the number of the openings 140 per unit length on the first surface 120 gradually increases, the aperture of the openings 140 on the first surface 120 may also gradually increase.

Specifically, in some embodiments, in order to gradually increase the air output of the openings 140 of the air-blowing member 100 in the first direction, the apertures of the openings 140 on the first surface 120 are the same in the first direction, and the number of the openings 140 per unit length on the first surface 120 is gradually increased; in the first direction, the number of the openings 140 may be the same in density, and the apertures of the openings 140 may gradually increase.

It is understood that, in other embodiments, the density of the number of the openings 140 and the aperture of the openings 140 may be increased or decreased in the first direction, and the density of the number of the openings 140 and the aperture of the openings 140 may be matched with each other, so that the area of the openings 140 per unit length on the first surface 120 may be gradually increased, and the air output of the openings 140 in the first direction may be gradually increased.

Alternatively, as shown in fig. 3, the opening 140 extends along a first direction, in the first direction, the width of the opening 140 in the direction forming an included angle with the first direction is gradually increased, so that the area of the opening 140 in the first surface 120 per unit length is gradually increased, and meanwhile, the gas discharge amount of the opening 140 in the first direction is gradually increased, and by providing a single opening 140 on the gas blowing member 100, a tedious process of providing a plurality of openings 140 is avoided, so that the manufacturing process of the gas blowing member 100 is simplified, and the manufacturing cost of the gas blowing member 100 is reduced.

Wherein, the width of both ends of the opening 140 extending along the first direction is greater than or equal to the width of the weld seam of the parts to be welded.

Specifically, the shape of the opening 140 may be trapezoidal, etc.

Alternatively, the gas blowing members 100 arcuately extend in the first direction in an arc shape so that the gas blowing members 100 are movable along the arc-shaped weld to blow the shielding gas to cover the weld; alternatively, the first and second liquid crystal display panels may be,

the gas blowing member 100 extends in a plate shape along a first direction so that the gas blowing member 100 can move along a simple linear weld to blow the shielding gas to cover the weld.

The radian of the arc-shaped air blowing piece 100 can be designed in advance according to the radian of the arc-shaped welding line, and the radian of the arc-shaped air blowing piece 100 can be larger than or equal to the radian of the arc-shaped welding line.

Specifically, when the gas blowing piece 100 is used for blowing gas to the weld joint, the shortest distance between the opening 140 of the gas blowing piece 100 and the weld joint can be greater than or equal to 3 mm and less than or equal to 5mm, so that the protective gas on the back of the weld joint can form a stable protective gas layer on the weld joint, and the oxidation of the back of the weld joint is avoided.

Fig. 4 is a schematic structural diagram of a welding protection apparatus 1000 according to an embodiment of the present disclosure. As shown in fig. 4, optionally, the connection assembly 200 includes a slide rail 210 and a limiting assembly 220, the slide rail 210 extends along a first direction, the gas blowing member 100 is slidably connected to the slide rail 210 along the extending direction of the slide rail 210, the limiting assembly 220 is connected to the slide rail 210, the limiting assembly 220 is used for being detachably connected to the member to be welded, the slide rail 210 can be disposed on the member to be welded through the limiting assembly 220, and the gas blowing member 100 can slide along the slide rail 210 to blow the weld joint.

The slide rail 210 may be an arc slide rail 210 or a linear slide rail 210.

Specifically, when the slide rail 210 is an arc-shaped slide rail 210, the slide rail 210 may be disposed in an arc-shaped weld seam pipe to be welded; when the slide rail 210 is a linear slide rail 210, the slide rail 210 may be disposed on the back of a linear weld plate or pipe to be welded. The blow piece 100 may be a metal slider.

Optionally, the air blowing member 100 includes a second surface 130 opposite to the first surface 120, the limiting assembly 220 includes a guide rail extending along the second surface 130 toward the first surface 120, the guide rail is used for connecting to the to-be-welded member, the slide rail 210 is slidably mounted on the guide rail to enable the slide rail 210 to slide along the extending direction of the guide rail, and the distance from the opening 140 of the air blowing member 100 to the weld joint can be adjusted by adjusting the position of the slide rail 210 relative to the guide rail, so as to achieve a better air blowing effect.

Wherein, still include spacing portion on the guide rail, the guide rail passes through spacing portion to realize spacing to the guide rail position.

Specifically, the distance from the opening 140 of the blowing part 100 to the weld is adjusted to be greater than or equal to 3 mm and less than or equal to 5mm by adjusting the position of the slide rail 210 relative to the guide rail.

Optionally, the air blowing member 100 includes a second surface 130 opposite to the first surface 120, the air blowing member 100 and the sliding rail 210 are sequentially distributed along a direction from the second surface 130 to the first surface 120, and the limiting component 220 is connected to one side of the sliding rail 210 along the direction from the second surface 130 to the first surface 120.

In order to blow the workpiece by the blowing member 100, when the blowing member 100 and the slide rail 210 are sequentially distributed along the direction from the second surface 130 to the first surface 120, the blowing member 100 and the slide rail 210 may be disposed in a staggered manner to avoid the slide rail 210 blocking the shielding gas blown by the blowing member 100.

Specifically, the blowing member 100 may be connected to a driving member, and the driving member drives the blowing member 100 to extend along the length direction of the slide rail 210.

Optionally, the slide rail 210 includes a first connection surface, the first connection surface of the slide rail 210 is disposed opposite to the first surface 120 of the blowing element 100, a through hole is formed in a position of the first connection surface of the slide rail 210 corresponding to the opening 140 of the first surface 120, the through hole extends along the length direction of the slide rail 210, and by forming the through hole on the slide rail 210, the shielding gas blown by the blowing element 100 can be blocked by an edge of the slide rail 210, so that the shielding gas can be prevented from being dispersed and escaping in a short time, and better, the shielding gas covers the back of the welding seam, and oxidation of the back of the welding seam is avoided.

The through opening is opposite to the opening 140 of the blowing part 100, so that the opening 140 of the blowing part 100 is communicated with the through opening.

Specifically, the width of the through opening on the slide rail 210 is greater than or equal to the maximum distance between the width-direction openings 140 on the blowing piece 100, and when there are a plurality of openings 140, the maximum distance between the width-direction openings 140 may be the distance between the edges of the openings 140 facing away from the two openings 140 that are farthest away from each other in the width direction.

In a specific embodiment, when the sliding rail 210 is provided with a through hole, the limiting component 220 can be an adhesive member, and the sliding rail 210 can be adhered to the surface of the member to be welded by the adhesive member.

Optionally, a second cavity extending along the extending direction of the slide rail 210 is formed in the slide rail 210, a water inlet and a water outlet respectively communicated with the second cavity are formed in the surface of the slide rail 210, and when the slide rail 210 is in contact with the edge of the weld joint, heat on the back of the weld joint can be taken away by the slide rail 210 through water cooling through heat conduction, so that oxidation on the back of the weld joint is avoided.

The water inlet speed in the water inlet can be adjusted to adapt to welding of welding joints with different powers.

Specifically, when a high-power welding head welds a welding seam, the water inlet speed in the water inlet can be adjusted quickly; when the welding seam is welded by the welding head with low power, the water inlet rate in the water inlet can be properly slowed down.

Optionally, the connection assembly 200 includes a rotation assembly and a bracket, the rotation assembly is rotatably connected to the bracket, the rotation assembly is connected to the blowing element 100 to drive the blowing element 100 to rotate, and a rotation axis of the blowing element 100 forms an included angle with the first direction, so that the openings 140 distributed along the first direction on the blowing element 100 rotate from the area of the opening 140 with low air flow rate toward the area of the opening 140 with high air flow rate.

The blowing member 100 can extend into the pipe to be welded through the rotating assembly, and the rotating assembly drives the blowing member 100 to rotate so as to blow the shielding gas with different flow rates to different areas of the weld joint through the blowing member 100.

Specifically, the distance from the opening 140 of the gas blowing member 100 to the weld is adjusted by rotating the assembly and the bracket, the distance from the opening 140 of the gas blowing member 100 to the weld may be greater than or equal to 3 mm, and the distance from the opening 140 of the gas blowing member 100 to the weld may be less than or equal to 5 mm.

Optionally, the air blowing part 100 includes a second surface 130 opposite to the first surface 120, the rotation assembly includes a first connection rod and a second connection rod connected at an included angle, the first connection rod is rotatably connected to the bracket, an extending direction of the second connection rod is along a direction of the first surface 120 toward the second surface 130, the second connection rod is connected to the air blowing part 100, the second connection rod includes a first expansion portion and a second expansion portion, the first expansion portion is connected at an included angle to the first connection rod, the first expansion portion and the second expansion portion are slidably connected along an extending direction of the second connection rod, the second expansion portion is connected to the air blowing part 100 to drive the air blowing part 100 to telescopically move along an extending direction of the second connection rod, the first expansion portion and the second expansion portion are slidable with each other through the second connection rod, and the welding protection device 1000 can be applied to circular welds of different diameters.

Wherein calving of the second connecting rod can be adjusted according to the circumferential weld of different diameters so that the air outlet of the air blowing member 100 can be spaced from the weld by a suitable distance range.

Specifically, when the diameter of the annular welding line is larger, the first telescopic part and the second telescopic part can slide back to back, so that the length of the second connecting rod is lengthened; when the diameter of the annular welding seam is smaller, the first telescopic part and the second telescopic part can be slid oppositely, so that the length of the second connecting rod is shortened.

Optionally, the blowing member 100 includes two end surfaces in the first direction, and at least one end surface of the blowing member 100 is opened with an air inlet 150, so that when the shielding gas is blown into the blowing member 100 through the air inlet 150, air in the blowing member 100 can be sufficiently exhausted to prevent oxygen from remaining in the blowing member 100.

Wherein the first cavity 110 of the air-blowing member 100 may extend in the first direction, so that the air in the first cavity 110 is easily discharged by the shielding gas blown in the first direction.

Specifically, when the air inlets 150 are formed in both end faces of the air blowing member 100, air can be introduced through the air inlets 150 in both directions, so that the air in the first cavity 110 can be sufficiently discharged, and in addition, the pressurization of the shielding gas in the first cavity 110 can be realized through the air introduction through the two air inlets 150, so that the shielding gas can be blown out from the opening 140 at a high speed, and the protection of the back face of the weld joint is good.

The embodiment of the present application further provides a welding method, the welding method includes a welding protection device 1000, and the specific structure of the welding protection device 1000 refers to the above embodiments, and since the welding protection device 1000 of the welding method adopts all technical solutions of all the above embodiments, at least all beneficial effects brought by the technical solutions of the above embodiments are achieved, and details are not repeated here.

Fig. 5 is a flowchart of a welding method according to an embodiment of the present disclosure. As shown in fig. 5, a welding method includes:

s100, welding the front side of a welding line of a piece to be welded through a welding head;

s200, blowing protective gas to a cooling section on the back of the welding seam through the blowing piece, and enabling the blowing piece and the welding head to move synchronously, wherein the cooling section extends from the welding head in the reverse direction of the moving direction of the welding head, and the blowing amount of the blowing piece to each position of the cooling section is gradually increased in the moving direction of the welding head.

The blowing member 100 may be spaced from the back of the weld, and the step S200 may cause the high-temperature weld region to correspond to the high-blowing amount of the shielding gas, so as to improve the utilization rate of the shielding gas and save the shielding gas.

Specifically, the distance of the opening 140 of the gas blowing member 100 for blowing the shielding gas from the back surface of the weld bead may be greater than or equal to 3 mm, and the distance of the opening 140 from the back surface of the weld bead may be less than or equal to 5 mm. Before the operation of the gas blowing member 100, the inert gas may be previously blown into the gas blowing member 100 for 10 seconds, and the inert gas may be continuously introduced after the air is exhausted.

Optionally, the inside of the air blowing member 100 is provided with a first cavity 110, the first surface 120 of the air blowing member 100 is provided with openings 140 distributed along a first direction, the openings 140 are communicated with the first cavity 110, the area of the openings 140 in a unit length on the first surface 120 is gradually increased in the first direction, and the surface of the air blowing member 100 is provided with an air inlet 150 communicated with the first cavity 110; the blowing piece 100 is connected with the connecting assembly 200, so that the connecting assembly 200 drives the blowing piece 100 to move along the first direction; the protective gas is blown to the cooling section of the back of the weld through the blow piece 100, and the blow piece 100 and the welding head are moved synchronously, including:

connecting the connecting assembly 200 with the to-be-welded member such that the opening 140 of the gas blowing member 100 faces the back of the weld, and the first direction of the gas blowing member 100 is consistent with the extending direction of the weld;

communicating the gas inlet 150 of the gas blowing member 100 with the shielding gas supply pipe so that the opening 140 blows the shielding gas toward the cooling section of the weld;

the blow member 100 is driven to move in a first direction by the connection assembly 200 so that the blow member 100 moves in synchronization with the welding head.

Wherein, the welding speed of the welding head and the blowing amount of the blowing piece 100 can be controlled, so that the good anti-oxidation effect on the back of the welding line can be realized.

Specifically, the blowing amount of the blowing member 100 can be 8 to 15L/min, and the welding speed can be controlled to be 25 to 40mm/s.

In some specific embodiments, the welding power of the welding head may also be controlled, for example:

for the aerospace field, the deformation of the titanium tube must be effectively controlled, namely the heat input of laser welding needs to be controlled.

For a 1mm thick titanium plate: the welding power can be 800W, and the welding speed can be 40mm/s;

for a 1.5mm thick titanium plate: the welding power can be 1200W, and the welding speed can be 35mm/s;

for 2.0mm thick titanium plates: the welding power can be 1500W, and the welding speed can be 30mm/s;

for 3.0mm thick titanium plates: the welding power may be 23000W and the welding speed may be 30mm/s.

In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to the related descriptions of other embodiments.

The welding protection device and the welding method provided by the embodiment of the application are described in detail, a specific example is applied in the description to explain the principle and the implementation of the application, and the description of the embodiment is only used for helping to understand the technical scheme and the core idea of the application; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure as defined by the appended claims.

Claims (7)

1. A weld protection device, comprising:

the welding device comprises an air blowing piece, a welding head and a welding head, wherein a first cavity is formed in the air blowing piece, openings distributed along a first direction are formed in a first surface of the air blowing piece, the openings are communicated with the first cavity, the area of the openings in the first surface in unit length is gradually increased in the first direction, an air inlet communicated with the first cavity is formed in the surface of the air blowing piece, the air blowing piece further comprises a second surface opposite to the first surface, the air blowing piece extends in an arc shape along the first direction, protective gas is blown to a cooling section on the back of the welding line through the air blowing piece, and the air blowing piece and the welding head move synchronously;

the connecting assembly comprises a sliding rail and a limiting assembly, the sliding rail extends along the first direction, the air blowing piece is connected with the sliding rail in a sliding mode along the extending direction of the sliding rail, the connecting assembly drives the air blowing piece to move along the first direction, the limiting assembly is connected with the sliding rail, and the limiting assembly is used for being detachably connected with a piece to be welded;

the connecting assembly comprises a rotating assembly and a support, the rotating assembly is rotatably connected with the support, the rotating assembly is connected with the air blowing piece to drive the air blowing piece to rotate, and an included angle is formed between the rotating axis of the air blowing piece and the first direction;

the rotating assembly comprises a first connecting rod and a second connecting rod which are connected in an included angle mode, the first connecting rod is rotatably connected with the support, the extending direction of the second connecting rod faces the direction of the second surface along the first surface, the second connecting rod is connected with the air blowing piece, the second connecting rod comprises a first telescopic part and a second telescopic part, the first telescopic part is connected with the first connecting rod in an included angle mode, the first telescopic part and the second telescopic part are connected in a sliding mode along the extending direction of the second connecting rod, and the second telescopic part is connected with the air blowing piece to drive the air blowing piece to move in a telescopic mode along the extending direction of the second connecting rod;

the limiting assembly comprises a guide rail extending towards the first surface along the second surface, the guide rail is used for being connected with the to-be-welded part, the sliding rail is mounted on the guide rail in a sliding mode, and the sliding rail can slide along the extending direction of the guide rail.

2. The weld protection device of claim 1, wherein the blowing member has a plurality of the openings arranged in sequence along the first direction;

in the first direction, the number of the openings in the first surface per unit length is gradually increased, so that the area of the openings in the first surface per unit length is gradually increased;

and/or the aperture of the opening on the first surface is gradually increased in the first direction, so that the area of the opening per unit length on the first surface is gradually increased.

3. The weld protection device of claim 1, wherein the opening extends in the first direction, and wherein the opening has a width that increases in a direction that is angled with respect to the first direction to increase an area of the opening per unit length of the first surface.

4. The welding protection device of claim 1, wherein the blowing member and the sliding rail are sequentially distributed along a direction from the second surface to the first surface, and the limiting component is connected to one side of the sliding rail along the direction from the second surface to the first surface;

the sliding rail comprises a first connecting surface, the first connecting surface of the sliding rail is arranged opposite to the first surface of the air blowing piece, a through hole is formed in the position, corresponding to the opening of the first surface, of the first connecting surface of the sliding rail, and the through hole extends along the length direction of the sliding rail;

a second cavity extending along the extending direction of the slide rail is formed in the slide rail, and a water inlet and a water outlet which are communicated with the second cavity respectively are formed in the surface of the slide rail.

5. The weld protection device of any one of claims 1 to 4, wherein the blow member includes two end surfaces in the first direction, at least one of the end surfaces of the blow member being open with the air inlet.

6. A welding method, characterized in that it is applied to the welding protection device of any one of claims 1 to 5, said method comprising:

welding the front side of a welding seam of a piece to be welded through a welding head;

adjusting the distance between the opening of the air blowing piece and the welding seam by adjusting the position of the sliding rail relative to the guide rail;

the connecting assembly drives the air blowing piece to move on the sliding rail along a first direction;

and blowing protective gas to a cooling section on the back of the welding seam through the gas blowing piece, and enabling the gas blowing piece and the welding head to move synchronously, wherein the cooling section extends from the welding head along the reverse direction of the moving direction of the welding head, and the gas blowing amount of the gas blowing piece to each position of the cooling section is gradually increased in the moving direction of the welding head.

7. The welding method of claim 6, wherein said blowing a shielding gas through said blowing member to a cooling section of a back side of said weld and moving said blowing member in synchronization with said welding head comprises:

connecting the connecting assembly with the to-be-welded part, so that the opening of the air blowing part faces the back of the welding seam, and the first direction of the air blowing part is consistent with the extending direction of the welding seam;

communicating a gas inlet of the gas blowing member with a shielding gas supply pipe so that the opening blows shielding gas toward a cooling section of the weld;

and driving the blowing piece to move along the first direction through the connecting assembly so as to enable the blowing piece and the welding head to move synchronously.

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