Wire feeding, blowing and dust collecting device for laser welding

Abstract

The invention relates to a wire feeding, blowing and dust collecting device for laser welding. The wire feeding, blowing and dust collecting device comprises a welding laser head and a wire feeding unit installed on one side of the welding laser head. The wire feeding unit is a three-in-one wire feeding mechanism, and the three-in-one wire feeding mechanism comprises a wire feeding fixing pipe, a dust suction pipe and a dust suction nozzle. According to the three-in-one device, the wire guide copper pipe, the welding shielding gas copper pipe and the dust collection pipe are coaxially designed, adjustment is easy and fast, the structure is compact and highly integrated, the three-in-one device is installed on the side face of a laser head, the functions of wire feeding, shielding gas blowing and dust collection are achieved, the risk of interference with welding products and tools is greatly reduced, and the welding reachable rate is effectively increased.

Description

Technical Field

[0001] The invention relates to the technical field related to laser welding, and in particular to a wire feeding, air blowing and dust suction device for laser welding. Background Art

[0002] Laser welding technology has been widely used in recent years. Laser welding can weld the base material by self-melting without filler wire. However, some products have high requirements on weld strength. When the precision of joint gap is not high, filler wire welding process is required. The commonly used mechanism of wire feeding device is wire guide copper tube. When the appearance of weld is required to be high, welding shielding gas needs to be blown. At the same time, to avoid environmental pollution, most customers will require the addition of dust suction pipe. The dust suction pipe is generally installed on the top of welding room, which can ventilate and dust the whole room. The smoke collection effect is not good. There is a lot of dust around welding tools, which affects the clamping precision of tools. Too much welding smoke remaining in the welding room will also affect the health of operators.

[0003] Some manufacturers also add an extra dust extraction port near the laser head to improve the dust collection effect, but the side-mounted dust extraction port structure is prone to interfere with products and tooling.

[0004] At present, the market generally uses wire guide copper tubes, shielding gas copper tubes, and dust suction tubes that are installed on the sides of the welding head respectively, which greatly affects the accessibility of welding. When welding in a narrow space, the product is easy to interfere with the wire guide copper tube, air blowing copper tube, and dust suction tube, resulting in welding inaccessibility. The three pipe fixing mechanisms are cumbersome to adjust, which limits the debugging efficiency.

[0005] In view of the above-mentioned defects, the designer actively carried out research and innovation in order to create a wire feeding, air blowing and dust suction device for laser welding to make it more valuable for industrial use. Summary of the invention

[0006] In order to solve any of the above technical problems, the purpose of the present invention is to provide a wire feeding, air blowing and dust suction device for laser welding.

[0007] To achieve the above object, the present invention adopts the following technical solution:

[0008] A wire feeding air blowing and dust suction device for laser welding comprises a welding laser head and a wire feeding unit installed on one side of the welding laser head;

[0009] The wire feeding unit is a three-in-one wire feeding mechanism, which includes a wire feeding fixed tube, a dust extraction tube and a dust suction nozzle. The top side of the wire feeding fixed tube is installed on one side of the welding laser head through a mounting mechanism. The dust extraction tube is located on the outside of the wire feeding fixed tube, and the bottom of the dust extraction tube is connected to the dust suction nozzle below. The bottom of the wire feeding fixed tube is connected to the top of the protective gas distribution shaft, and the outer side of the wire feeding fixed tube near the middle is connected to the top of the air nozzle located on the inside of the dust suction nozzle. The bottom of the wire feeding fixed tube is connected to the top of the wire guide nozzle located on the inside of the air nozzle. A wire guide hose is installed in the wire feeding fixed tube, and the bottom of the wire guide hose passes through the protective gas distribution shaft and then is connected to the wire guide nozzle below.

[0010] As a further improvement of the present invention, the installation mechanism includes a right-angle adjustable fixing plate, a clamping block and a rotating shaft. A clamping block is installed on one side of the wire feeding fixing tube near the top. The clamping block is connected to the right-angle adjustable fixing plate through the rotating shaft. The right-angle adjustable fixing plate is installed on one side of the welding laser head.

[0011] As a further improvement of the present invention, the top side of the wire guide hose is installed in the wire feeding fixed tube through an upper sealing ring, and the side of the wire guide hose close to the bottom is installed in the protective gas distribution shaft through a lower sealing ring.

[0012] As a further improvement of the present invention, a welding wire is arranged in the wire guide hose, and the bottom of the welding wire passes through the wire guide nozzle and continues to extend out.

[0013] As a further improvement of the present invention, the top of the dust extraction pipe is installed on the wire feeding fixed pipe through the first throat clamp of the dust extraction pipe, the second throat clamp of the dust extraction pipe is installed on the dust extraction branch pipe on one side of the dust extraction pipe, and the bottom of the dust extraction pipe is connected to the dust suction nozzle below through the third throat clamp of the dust extraction pipe.

[0014] As a further improvement of the present invention, a shielding gas quick-connect connector is installed on one side of the wire feeding fixing tube close to the top.

[0015] As a further improvement of the present invention, the wire feeding fixed tube and the protective gas distribution shaft, the protective gas distribution shaft and the wire guide nozzle, and the protective gas distribution shaft and the air jet nozzle are all connected together by threads.

[0016] As a further improvement of the present invention, a plurality of air injection holes are evenly distributed along the circumferential direction at a position close to the middle of the protective gas distribution axis and located inside the air injection nozzle.

[0017] As a further improvement of the present invention, the bottom of the air nozzle is a conical structure.

[0018] As a further improvement of the present invention, the protective gas distribution air shaft, the wire guide nozzle, the air jet nozzle and the dust suction nozzle are coaxial.

[0019] By means of the above scheme, the present invention has at least the following advantages:

[0020] The present invention provides a three-in-one device with a coaxial design of a wire guide copper tube, a welding shielding gas copper tube, and a dust suction tube. The device has simple and quick adjustment, a compact structure, and is highly integrated. The device is installed on the side of a laser head to meet the functions of wire feeding, shielding gas blowing, and dust suction. The device also greatly reduces the risk of interference with welding products and tooling, and effectively improves the welding accessibility.

[0021] The present invention has a built-in flexible wire guide hose in the coaxial device to ensure a stable and uniform wire feeding speed, and a built-in annular gas distributor to ensure that the protective gas is sprayed from the circular array of air holes in the nozzle to fully cover the welding molten pool, thereby preventing oxidation during solidification to a great extent and avoiding welding defects.

[0022] During laser welding, the mechanism of the present invention can simultaneously meet the requirements of wire feeding, blowing welding protective gas and dust extraction at the weld, the three-in-one coaxial mechanism has a compact structure, reduces welding defects and improves the quality of the working environment.

[0023] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 It is a structural schematic diagram of a wire feeding, air blowing and dust suction device for laser welding of the present invention;

[0026] Figure 2 yes Figure 1 Structural diagram of the three-in-one wire feeding mechanism;

[0027] Figure 3 yes Figure 2 Schematic diagram of the decomposition structure;

[0028] Figure 4 yes Figure 2 Schematic diagram of the local internal structure.

[0029] The meanings of the various reference numerals in the figures are as follows.

[0030] Welding laser head 1, three-in-one wire feeding mechanism 2, schematic diagram of laser beam 3, schematic diagram of overlap of welding wire and laser focus 4, right-angle adjustable fixing plate 5, clamping block 6, rotating shaft 7, upper sealing ring 8, wire feeding fixing tube 9, wire guide hose 10, first throat hoop of dust extraction tube 11, second throat hoop of dust extraction tube 12, dust extraction tube 13, third throat hoop of dust extraction tube 14, lower sealing ring 15, shielding gas distribution shaft 16, wire guide nozzle 17, air nozzle 18, dust suction nozzle 19, welding wire 20, shielding gas quick plug connector 21. DETAILED DESCRIPTION

[0031] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0032] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiment of the present invention, rather than all the embodiments. The components of the embodiment of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiment of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents the selected embodiment of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present invention.

[0033] like Figure 1 to Figure 4 As shown, a wire feeding, air blowing and dust suction device for laser welding includes a welding laser head 1 and a wire feeding unit installed on one side of the welding laser head 1.

[0034] The wire feeding unit is a three-in-one wire feeding mechanism 2, which includes a wire feeding fixed tube 9, a dust extraction tube 13 and a dust suction nozzle 19. The top side of the wire feeding fixed tube 9 is installed on one side of the welding laser head 1 through a mounting mechanism. The mounting mechanism includes a right-angle adjustable fixing plate 5, a clamping block 6 and a rotating shaft 7. The clamping block 6 is installed on one side of the wire feeding fixed tube 9 near the top. The clamping block 6 is connected to the right-angle adjustable fixing plate 5 through the rotating shaft 7. The right-angle adjustable fixing plate 5 is installed on one side of the welding laser head 1.

[0035] The dust extraction pipe 13 is located outside the wire feeding fixed pipe 9, and the bottom of the dust extraction pipe 13 is connected to the dust suction nozzle 19 below. The bottom of the wire feeding fixed pipe 9 is connected to the top of the protective gas distribution shaft 16. The outer side of the wire feeding fixed pipe 9 near the middle is connected to the top of the air nozzle 18 located inside the dust suction nozzle 19, and the bottom of the air nozzle 18 is a conical structure. The bottom of the wire feeding fixed pipe 9 is connected to the top of the wire guide nozzle 17 located inside the air nozzle 18. A wire guide hose 10 is installed in the wire feeding fixed pipe 9. The bottom of the wire guide hose 10 passes through the protective gas distribution shaft 16 and then connects to the wire guide nozzle 17 below. Among them, the protective gas distribution shaft 16, the wire guide nozzle 17, the air nozzle 18 and the dust suction nozzle 19 are coaxial.

[0036] The top side of the wire guide hose 10 is installed in the wire feeding fixed tube 9 through the upper sealing ring 8, and the side of the wire guide hose 10 close to the bottom is installed in the protective gas distribution shaft 16 through the lower sealing ring 15. A welding wire 20 is arranged in the wire guide hose 10, and the bottom of the welding wire 20 passes through the wire guide nozzle 17 and continues to extend out.

[0037] The top of the dust extraction pipe 13 is installed on the wire feeding fixed pipe 9 through the first dust extraction pipe throat hoop 11, the second dust extraction pipe throat hoop 12 is installed on the dust extraction branch pipe on one side of the dust extraction pipe 13, and the bottom of the dust extraction pipe 13 is connected to the dust suction nozzle 19 below through the third dust extraction pipe throat hoop 14. A shielding gas quick-connect connector 21 is installed on one side of the wire feeding fixed pipe 9 near the top.

[0038] The wire feeding fixed tube 9 and the protective gas distributor shaft 16 , the protective gas distributor shaft 16 and the wire guide nozzle 17 , and the protective gas distributor shaft 16 and the air nozzle 18 are all connected together by threads.

[0039] A plurality of air injection holes are evenly distributed along the circumferential direction at a position close to the middle of the protective air distribution shaft 16 and located inside the air injection nozzle 18 .

[0040] The first embodiment of the present invention:

[0041] The present invention provides a compact coaxial three-in-one wire feeding, air blowing and dust extraction mechanism for laser welding, which can improve the welding accessibility, more effectively blow protective gas to cover the molten pool, reduce oxidation and prevent welding defects, and can extract welding fumes close to the weld during the welding process, thereby improving the air quality of the working environment.

[0042] The welding laser head 1 is a market standard part. The three-in-one wire feeding mechanism 2 is fixed to the side of the welding laser head 1 through a right-angle adjustable fixing plate 5 with a hexagon socket screw. The connecting piece is the main parameters of the assembly position including the laser beam (such as Figure 1 The focus of the laser beam in the figure 3) needs to coincide with the end of the welding wire 20 at the end of the wire feeding mechanism 2, (such as Figure 1The welding wire and the laser focus overlap in the diagram 4). The three-in-one wire feeding mechanism 2 can realize height adjustment, front and rear adjustment of the wire spacing, and can also rotate around the rotation axis 7 to realize position adjustment of the welding wire 20.

[0043] The right-angle adjustable fixing plate 5 and the rotating shaft 7 are connected by screws, the rotating shaft 7 and the clamping block 6 are connected by screws, the clamping block 6 and the wire feeding fixing tube 9 are connected by a clamping structure, the clamping block 6 is equipped with two screws, and the locking screws lock the clamping block 6 and the wire feeding fixing tube 9.

[0044] The wire guide hose 10 is equipped with an upper sealing ring 8 and a lower sealing ring 15. After assembly, the whole is installed in the wire feeding fixed tube 9. The protective gas distribution shaft 16 and the wire feeding fixed tube 9 are threadedly connected. The upper sealing ring 8 and the inner hole of the wire feeding fixed tube 9 are sealed to prevent leakage of protective gas. The lower sealing ring 15 and the inner hole of the protective gas distribution shaft 16 are sealed to prevent leakage of protective gas. The wire guide nozzle 17 is threadedly connected to the protective gas distribution shaft 16, and the air nozzle 18 is threadedly connected to the protective gas distribution shaft 16.

[0045] The dust extraction pipe 13 adopts a corrugated tube structure at the bending part, which can be effectively bent. The wire feeding fixing tube 9 is inserted into the dust extraction pipe 13, and the first dust extraction pipe throat clamp 11 is used to lock the dust extraction pipe 13. The second dust extraction pipe throat clamp 12 is used to lock the external dust collector pipeline and the dust extraction branch pipe on the dust extraction pipe 13. The third dust extraction pipe throat clamp 14 is used to lock the dust nozzle 19 and the dust extraction pipe 13.

[0046] The rotating shaft 7 can move and lock in the slide groove of the right-angle adjustable fixing plate 5. The rotating shaft 7 can rotate with the clamp block 6 to adjust the angle of the wire feeding fixed tube 9. After loosening the screw of the clamp block 6, the wire feeding fixed tube 9 can be adjusted in height and rotation. The gas pipe of the welding shielding gas from the gas tank is connected to the shielding gas quick plug connector 21, and the shielding gas quick plug connector 21 is connected to the threaded connection on the side of the wire feeding fixed tube 9, and the shielding gas leads to the inside of the wire feeding fixed tube 9. The wire feeding flexible tube of the external wire feeder is connected to the end of the wire feeding fixed tube 9 by external threads. The welding wire 20 passes through the wire guide hose 10, the shielding gas distribution shaft 16, and the wire guide nozzle 17 and then protrudes 10mm. The shielding gas distribution shaft 16 has an annular circumferential array of jet holes, which makes the shielding gas evenly transported and reduces the blowing pressure. The jet nozzle 18 has a taper design that can effectively guide the welding shielding gas to the surface of the molten pool, effectively improving the internal and surface quality of the weld after solidification. The external dust collector pipe is connected to the dust extraction pipe 13. When welding starts, the internal smoke extraction makes the dust suction nozzle 19 generate negative pressure wind speed, automatically absorbing the smoke generated during welding. The welding wire 20, the shielding gas distribution shaft 16 and the dust suction nozzle 19 are coaxial, with a compact structure and good blowing and dust suction effect.

[0047] The present invention provides a three-in-one device with a coaxial design of a wire guide copper tube, a welding shielding gas copper tube, and a dust suction tube. The device is simple and quick to adjust, has a compact structure and is highly integrated. It is installed on the side of the laser head to meet the functions of wire feeding, blowing shielding gas, and dust suction. It also greatly reduces the risk of interference with welding products and tooling, and effectively improves the welding accessibility rate. A flexible wire guide hose is built into the coaxial device to ensure a stable and uniform wire feeding speed. A built-in annular gas distributor block ensures that the shielding gas is sprayed from the circumferential array of air holes in the nozzle to fully cover the welding molten pool, which greatly prevents oxidation during solidification and avoids welding defects. During laser welding, the mechanism can simultaneously meet the needs of wire feeding, blowing welding shielding gas, and dust extraction at the weld. The three-in-one coaxial device has a compact structure, reduces welding defects, and improves the quality of the working environment.

[0048] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implying the number of technical features indicated. Thus, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0049] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be a direct connection or an indirect connection through an intermediate medium. It can also be the internal connection of two elements.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the technical principles of the present invention, and these improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A wire feeding, air blowing and dust suction device for laser welding, comprising a welding laser head (1) and a wire feeding unit installed on one side of the welding laser head (1); characterized in that: The wire feeding unit is a three-in-one wire feeding mechanism (2), which comprises a wire feeding fixed tube (9), a dust extraction tube (13) and a dust suction nozzle (19). The top side of the wire feeding fixed tube (9) is installed on one side of the welding laser head (1) through a mounting mechanism. The dust extraction tube (13) is located outside the wire feeding fixed tube (9). The bottom of the dust extraction tube (13) is connected to the dust suction nozzle (19) below. The bottom of the wire feeding fixed tube (9) is connected to the protective gas distribution system. The top of the shaft (16) is connected, the outer side of the wire feeding fixed tube (9) near the middle is connected to the top of the air nozzle (18) located on the inner side of the dust suction nozzle (19), the bottom of the wire feeding fixed tube (9) is connected to the top of the wire guide nozzle (17) located on the inner side of the air nozzle (18), a wire guide hose (10) is installed in the wire feeding fixed tube (9), and the bottom of the wire guide hose (10) passes through the protective gas distribution shaft (16) and then is connected to the wire guide nozzle (17) below.

2. The wire feeding air blowing and dust suction device for laser welding according to claim 1, characterized in that: The mounting mechanism comprises a right-angle adjustable fixing plate (5), a clamping block (6) and a rotating shaft (7); the clamping block (6) is mounted on one side of the wire feeding fixing tube (9) close to the top; the clamping block (6) is connected to the right-angle adjustable fixing plate (5) via the rotating shaft (7); and the right-angle adjustable fixing plate (5) is mounted on one side of the welding laser head (1).

3. The wire feeding air blowing and dust suction device for laser welding according to claim 1, characterized in that: The top side of the wire guide hose (10) is installed in the wire feeding fixed tube (9) through an upper sealing ring (8), and the side of the wire guide hose (10) close to the bottom is installed in the protective gas distribution shaft (16) through a lower sealing ring (15).

4. The wire feeding air blowing and dust suction device for laser welding according to claim 1, characterized in that: A welding wire (20) is arranged in the wire guide hose (10), and the bottom of the welding wire (20) passes through the wire guide nozzle (17) and continues to extend out.

5. The wire feeding air blowing and dust suction device for laser welding according to claim 1, characterized in that: The top of the dust extraction pipe (13) is installed on the wire feeding fixed pipe (9) through a first dust extraction pipe throat hoop (11), a second dust extraction pipe throat hoop (12) is installed on a dust extraction branch pipe on one side of the dust extraction pipe (13), and the bottom of the dust extraction pipe (13) is connected to a dust suction nozzle (19) below through a third dust extraction pipe throat hoop (14).

6. The wire feeding air blowing and dust suction device for laser welding according to claim 1, characterized in that: A shielding gas quick-connect connector (21) is installed on one side of the wire feeding fixed tube (9) close to the top.

7. The wire feeding air blowing and dust suction device for laser welding according to claim 1, characterized in that: The wire feeding fixed tube (9) and the protective gas distribution shaft (16), the protective gas distribution shaft (16) and the wire guide nozzle (17), and the protective gas distribution shaft (16) and the air nozzle (18) are all connected together through threads.

8. The wire feeding air blowing and dust suction device for laser welding according to claim 1, characterized in that: A plurality of air injection holes are evenly distributed along the circumferential direction at a position close to the middle of the protective air distribution axis (16) and located inside the air injection nozzle (18).

9. The wire feeding air blowing and dust suction device for laser welding according to claim 1 or 7, characterized in that: The bottom of the air nozzle (18) is a conical structure.

10. The wire feeding air blowing and dust suction device for laser welding according to claim 1, characterized in that: The protective gas distribution shaft (16), the wire guide nozzle (17), the air jet nozzle (18) and the dust suction nozzle (19) are coaxial.

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