Handheld laser spot welding tool

Abstract

The invention belongs to the technical field of laser welding tools, and discloses a handheld laser spot welding tool which comprises a wire feeding assembly and a supporting component used for being connected with a gun barrel of a laser welding gun, the supporting component is provided with a welding channel penetrating in the axial direction, and the supporting component comprises a cover part used for making contact with a workpiece to be welded and located on the outer side of the welding channel. The wire feeding assembly penetrates into the inner side of the cover part, and the axis of the wire feeding assembly and the axis of the supporting component intersect on the surface of the workpiece to be welded. Through the supporting component and the wire feeding assembly arranged through the connecting port, the supporting component can stabilize the welding gun so that the welding gun can not swing left and right easily, it is guaranteed that the contact state of the welding gun is stable, the contact state of the welding gun is not affected by fluctuation of the pushing force of the welding wire, and meanwhile the welding gun can be effectively supported; wire adhesion caused by falling of the welding gun due to wire drawing is avoided, and the welding quality risk is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of laser welding tooling, and in particular relates to a handheld laser spot welding tooling. Background Art

[0002] Laser welding is an efficient and precise welding method that uses a high-energy-density laser beam as a heat source. Currently, there are both relatively large automatic laser welding equipment and miniaturized laser welding equipment for personal handheld use, which can perform customized direct welding on the objects to be welded.

[0003] Handheld laser welding equipment usually mainly includes welding host, cables and handheld welding gun, such as Figure 1-3 As shown, a handheld laser spot welding tool in the prior art is a welding copper nozzle connected to the end of the welding gun barrel, and cooperates with the wire feeding assembly to realize wire feeding laser welding. When laser spot welding uses an ordinary copper nozzle for welding, only the welding wire contacts the surface of the workpiece. When the welding is completed, the wire feeder draws the wire, and the welding gun will push forward facing the molten pool under the action of gravity. The molten pool will stick to the welding wire, making it difficult to break the wire. In addition, when implementing wire feeding laser spot welding, only the welding wire contacts the surface of the workpiece, but the welding wire thrust provided by the wire feeder is affected by many factors such as the friction of the long-distance wire feeding. The resulting f reaction force is unstable, which causes the welding gun to easily swing left and right, resulting in a highly unstable size of the weld spot, which brings risks to the welding quality. Summary of the invention

[0004] In view of this, the object of the present invention is to provide a handheld laser spot welding tool to solve the problems of wire sticking and unstable wire feeding force causing swinging in existing welding tools.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A handheld laser spot welding tool comprises a wire feeding assembly and a support member for connecting to a laser welding gun barrel, the support member is provided with a welding channel extending axially therethrough, the support member comprises a cover portion for contacting a workpiece to be welded and being located outside the welding channel, the wire feeding assembly penetrates into the inside of the cover portion, and the axis of the wire feeding assembly intersects with the axis of the support member at the surface of the workpiece to be welded.

[0007] In a possible implementation, the cover portion is provided with a movable opening, and the wire feeding assembly is connected to the supporting member via a rotating connection assembly so as to perform rotational movement in the movable opening.

[0008] In a possible implementation, the rotating connection assembly includes a connecting ear, a rotating member and a locking member, the wire feeding assembly is rotatably connected to the connecting ear via the rotating member, and the locking member is connected to the rotating member to lock and fix the rotating member.

[0009] In a possible implementation, the support member further includes a connection portion for detachably connecting to a gun rod of a laser welding gun, and the connection portion is penetrated axially by a welding channel.

[0010] In a possible implementation, the connection portion is provided with an internal thread for mating with a thread of a laser welding gun barrel.

[0011] In a possible implementation, the cover portion has an annular contact surface that abuts against the surface of a workpiece to be welded.

[0012] In a possible implementation, the cover portion is provided with an observation port.

[0013] In a possible implementation, the wire feeding assembly includes a fixed tube, a wire feeding guide nozzle, a clamping connector and a spring tube, one end of the fixed tube is connected to the wire feeding guide nozzle, and the other end of the fixed tube is connected to the spring tube through the clamping connector, and the spring tube is used to connect the wire feeding equipment.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The handheld laser spot welding tool of the present invention uses a supporting component and a wire feeding assembly arranged through a connecting port. The supporting component can stabilize the welding gun so that the welding gun is not easy to swing left and right, ensure the stability of the contact state of the welding gun, and make the contact state of the welding gun not be affected by the fluctuation of the driving force of the welding wire. At the same time, it can also effectively support the welding gun, and will not cause wire sticking due to the welding gun falling due to wire drawing, thereby reducing the risk of welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of an existing spot welding tool;

[0017] Figure 2 It is a schematic diagram of the welding principle of the existing spot welding tool;

[0018] Figure 3 It is a schematic diagram of welding force of existing spot welding tooling;

[0019] Figure 4 It is a structural schematic diagram of a handheld laser spot welding tool;

[0020] Figure 5 A cross-sectional view of a handheld laser spot welding tool.

[0021] In the figure: 01-wire feeding assembly; 02-support member; 1-hood; 2-clamping nut; 3-spring tube; 4-welding wire; 5-wire feeding guide nozzle; 6-laser beam; 7-laser welding gun barrel; 8-fixing tube; 9-observation port; 10-connecting ear; 11-movable port. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with specific implementation methods.

[0023] Please refer to Figure 4 and Figure 5 As shown, an embodiment of the present application provides a handheld laser spot welding tool, including a wire feeding assembly 01 and a support member 02 for connecting to a laser welding gun barrel 7, wherein the support member 02 is provided with a welding channel extending axially therethrough, and the support member 02 includes a cover portion 1 for contacting a workpiece to be welded and located outside the welding channel, the wire feeding assembly 01 penetrates into the inner side of the cover portion 1, and the axis of the wire feeding assembly 01 intersects with the axis of the support member 02 at the surface of the workpiece to be welded.

[0024] Among them, the wire feeding assembly 01 is mainly used to guide the welding wire 4 to the welding point so as to intersect with the laser output by the welding gun for welding. It is connected to a wire feeder, which can provide continuous wire feeding of the welding wire 4 for tooling welding. The support member 02 is used to be installed on the gun rod 7 of the laser welding gun, and needs to contact the surface of the workpiece to be welded during the welding process, so that the welding gun can be stable under the pressure contact between the support member 02 and the surface of the workpiece. The welding channel of the support member 02 can facilitate the passage of the laser output by the welding gun, and its cover part 1 can facilitate stable support. During the welding process, the molten pool is located in the cover part 1, which can also play a certain barrier role on the molten pool, so as to perform welding more safely. The wire feeding assembly 01 is inserted into the cover 1 and extends into the inner side of the cover 1, so that the wire feeding assembly 01 can weld at a preset angle, and the laser beam 6 emitted along the axis of the wire feeding assembly 01 and the welding wire 4 fed along the axis of the support member 02 intersect at the surface of the workpiece to be welded, so that welding can be achieved, and because the cover 1 of the support member 02 is in contact with the support component, the intersection position of the laser and the welding wire 4 is also basically flush with the end face of the cover 1. The support member 02 can stabilize the welding gun so that the welding gun is not easy to swing left and right, and can also effectively support the welding gun, so that the welding gun does not fall due to wire drawing and wire sticking occurs, which can reduce the risk of welding quality.

[0025] It can be understood that the cover 1 is mainly used to contact the workpiece to be welded and provide support for the welding gun. At the same time, in order to avoid affecting the welding or interfering with the molten pool, the cover 1 can be an annular structure or other structures, such as a triangular support structure. This structure can also achieve the same function and is not limited.

[0026] Through the above technical solution, the support component 02 and the wire feeding assembly 01 arranged through the connecting port, the support component can not only stabilize the welding gun so that the welding gun is not easy to swing left and right, ensure the stability of the contact state of the welding gun, and make the contact state of the welding gun not affected by the fluctuation of the driving force of the welding wire 4, but also effectively support the welding gun, and will not cause wire sticking due to the falling of the welding gun due to wire drawing, thereby reducing the risk of welding quality.

[0027] In one embodiment, the cover portion 1 is provided with a movable opening 11 , and the wire feeding assembly 01 is connected to the supporting member 02 via a rotating connection assembly so as to perform rotational movement at the movable opening 11 .

[0028] In this way, the wire feeding assembly 01 can rotate or swing in the movable opening 11, which makes installation and adjustment easier.

[0029] Furthermore, in order to achieve more stable welding and play a certain role in the welding process to protect the wire feeding assembly 01, the rotating connection assembly includes a connecting ear 10, a rotating member and a locking member. The wire feeding assembly 01 is rotatably connected to the connecting ear 10 through the rotating member, and the locking member is connected to the rotating member to lock and fix the rotating member.

[0030] In this way, the wire feeding assembly 01 can rotate on the supporting member 02 through the connecting ear 10 and the rotating member, and the rotation range is the range limited by the movable opening 11, and the locking member is used to lock and fix the rotating member so that the wire feeding assembly 01 basically does not rotate during the welding process. During welding, it is necessary to press the supporting member 02 to a certain extent to ensure that the supporting member 02 is in stable contact with the workpiece. During this process, when the locked or incompletely locked wire feeding assembly 01 presses the supporting member 02 too hard, the wire feeding assembly 01 can rotate slightly to avoid the problem of rigid damage to the rotating structure of the wire feeding assembly 01 due to excessive pressing force, and it is also convenient for adjustment when installing or replacing the wire feeding assembly 01.

[0031] Specifically, the rotating member may be a screw and cooperate with a nut as a locking member to achieve locking and facilitate tightness adjustment.

[0032] In the embodiment of the present application, the support member 02 may further include a connection portion for detachably connecting to the laser welding gun barrel 7, and the connection portion is axially penetrated by the welding channel.

[0033] The connection part is used for detachable connection with the laser welding gun barrel 7, and the detachable connection method can be threaded connection, clamping connection, or other connection methods, which are not limited. Through the detachable connection part, the support member 02 can be separated from the barrel of the laser welding gun, which makes it easier to replace or repair, and also makes it easier to install tooling with other functional requirements, which is more convenient and quick.

[0034] Preferably, the connection portion is provided with an internal thread for threadedly matching with the laser welding gun barrel 7. Correspondingly, the corresponding connection portion of the welding gun is provided with mutually adapted external threads, which can be more conveniently connected and installed through threaded connection.

[0035] In order to achieve more stable support, the cover 1 has an annular contact surface that abuts against the surface of the workpiece to be welded. The annular contact surface allows the cover 1 to contact the workpiece to be welded through the annular contact surface. The annular contact surface is circular, and the support is more stable when pressure is applied, and the force is more balanced.

[0036] In the specific implementation process, the cover 1 is provided with an observation port 9. The observation port 9 allows the operator to understand the welding situation in the cover 1 through the observation port 9, which is more convenient.

[0037] In a preferred embodiment of the wire feeding assembly 01, the wire feeding assembly 01 may include a fixed tube 8, a wire feeding guide nozzle 5, a clamping connector and a spring tube 3, one end of the fixed tube 8 is connected to the wire feeding guide nozzle 5, and the other end of the fixed tube 8 is connected to the spring tube 3 through the clamping connector, and the spring tube 3 is used to connect the wire feeding equipment.

[0038] The fixed tube 8 is connected to the movable opening 11, and the wire guide nozzle 5 connected to one end thereof can facilitate the outward output of the welding wire 4, while the spring tube 3 connected to the other end through the clamping connector can facilitate the welding wire 4 to be bent and transported to a certain extent, and can stably output the welding wire 4 under the continuous transport of the wire feeding device such as the wire feeder. Specifically, the clamping connector is a clamping nut 2.

[0039] A handheld laser spot welding tool in an embodiment of the present application has a support component 02 that can keep the contact state between the welding gun and the workpiece stable, and the contact state of the welding gun is not affected by the driving force of the welding wire 4, thereby achieving stable welding. In addition, the tool can ensure that when the laser spot welding is completed, the wire feeder can simply drag the welding wire 4 away from the molten pool when drawing the wire, thereby breaking the wire and forming a more ideal welding point.

[0040] The above are only preferred embodiments of the present invention. It should be noted that the above preferred embodiments should not be regarded as limiting the present invention, and the protection scope of the present invention should be based on the scope defined by the claims. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the spirit and scope of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A handheld laser spot welding tool, characterized in that: The invention comprises a wire feeding assembly (01) and a supporting member (02) for connecting with a gun rod (7) of a laser welding gun, wherein the supporting member (02) is provided with a welding channel extending axially therethrough, and the supporting member (02) comprises a cover portion (1) for contacting a workpiece to be welded and located outside the welding channel, the wire feeding assembly (01) penetrates into the inner side of the cover portion (1), and the axis of the wire feeding assembly (01) intersects with the axis of the supporting member (02) at the surface of the workpiece to be welded.

2. A handheld laser spot welding tool as claimed in claim 1, characterized in that: The cover part (1) is provided with a movable opening (11), and the wire feeding assembly (01) is connected to the supporting member (02) via a rotating connection assembly so as to perform rotational movement at the movable opening (11).

3. A handheld laser spot welding tool as claimed in claim 2, characterized in that: The rotating connection assembly comprises a connecting ear (10), a rotating member and a locking member. The wire feeding assembly (01) is rotationally connected to the connecting ear (10) via the rotating member, and the locking member is connected to the rotating member to lock and fix the rotating member.

4. A handheld laser spot welding tool as claimed in claim 1, characterized in that: The support member (02) further comprises a connection portion for detachably connecting to a laser welding gun rod (7), wherein the connection portion is penetrated axially by a welding channel.

5. A handheld laser spot welding tool as claimed in claim 4, characterized in that: The connecting portion is provided with an internal thread for threadably cooperating with a laser welding gun rod (7).

6. A handheld laser spot welding tool as claimed in claim 1, characterized in that: The cover part (1) has an annular contact surface which abuts against the surface of a workpiece to be welded.

7. The handheld laser spot welding tool as claimed in claim 1, characterized in that: The cover part (1) is provided with an observation port (9).

8. The handheld laser spot welding tool as claimed in claim 1, characterized in that: The wire feeding assembly (01) comprises a fixed tube (8), a wire feeding guide nozzle (5), a clamping connector and a spring tube (3), one end of the fixed tube (8) is connected to the wire feeding guide nozzle (5), and the other end of the fixed tube (8) is connected to the spring tube (3) via the clamping connector, and the spring tube (3) is used to connect the wire feeding device.

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