Laser welding torch with enhanced laser emission function

Abstract

The present invention relates to a laser welding torch in which, during a process of outputting a gas and laser required for welding, an exhaust path of the gas is independently modified so as not to interfere with the straightness of the laser being emitted. More specifically, the laser welding torch comprises: a torch front end in which a first laser path, through which the laser moves, and a first gas path, through which the gas moves, are formed independently of each other, and a first cooling circulation path for heat exchange between cooling water and the laser is formed; and a torch rear end in which a second laser path in communication with the first laser path, a second gas path in communication with the first gas path, and a second cooling circulation path in communication with the first cooling circulation path are formed. The torch rear end includes: a first forming member for forming the second laser path and the second gas path so that the laser and gas do not interfere with each other before being output to the outside of the laser welding torch; and a second forming member for maintaining the air tightness of the second gas path in conjunction with the first forming member, and forming the second cooling circulation path.

Description

Laser welding torch with enhanced laser irradiation function

[0001] The present invention relates to a laser welding torch that does not interfere with the straightness of the irradiated laser by independently modifying the exhaust path of the gas and laser required for welding during the process of outputting the gas and laser.

[0002] Generally, various machine tools are used to process base materials. Base materials can be processed using diverse types of machine tools, such as lathes, milling machines, and drilling machines, and one or more machine tools can be utilized to produce a wider variety of products suitable for specific needs.

[0003] In machine tools, not only contact processing devices that process by contacting cutting edges, etc., with a base material, but also non-contact processing devices that process by irradiating a high-temperature laser beam onto the base material are widely used, and as an example, a laser processing device (also called a 'laser welding torch') is known as prior art.

[0004] The aforementioned conventional laser processing device is configured to generate and focus a laser beam and irradiate it toward the processing surface of a workpiece. Laser processing devices are highly useful in industrial settings because they produce a smooth processing surface, are noiseless during operation, and enable fine and precise processing.

[0005] A head with an optical nozzle is formed in the portion of the laser processing device facing the workpiece, and an optical system consisting of multiple lenses is provided inside the head. Accordingly, focused laser light can be irradiated from the optical system through the nozzle onto the workpiece.

[0006] Meanwhile, the gas and laser supplied to the aforementioned conventional laser processing device satisfy a structure in which they are supplied independently of each other, but have a structure in which they are combined in a single path and discharged or irradiated before the output stage in which the gas is discharged to the outside or the laser is irradiated.

[0007] Therefore, the aforementioned conventional laser processing device structure has problems such as reduced welding quality and inconvenience when performing wide-range welding, because interference occurs between the discharge pressure of the gas discharged at a predetermined pressure and the straight-line laser.

[0008] To solve the aforementioned conventional problems, the present invention aims to provide a laser welding torch capable of performing laser welding without interfering with the straightness of the laser by maintaining the mutual movement paths of the externally supplied laser and gas independently until they are output.

[0009] To solve the aforementioned conventional problems, the laser welding torch with an improved laser irradiation function according to the present invention is a laser welding torch for welding, wherein the laser welding torch comprises a front end portion in which a first laser path for moving a laser and a first gas path for moving a gas are formed independently of each other, and a first cooling circulation path for heat exchange between cooling water and a laser is formed internally, and a rear end portion in which a second laser path communicating with the first laser path, a second gas path communicating with the first gas path, and a second cooling circulation path communicating with the first cooling circulation path are formed, wherein the rear end portion comprises a first forming member that forms the second laser path and the second gas path so as not to interfere with each other until the laser and gas are output to the outside of the laser welding torch, and a second forming member that forms the second cooling circulation path while maintaining the airtightness of the second gas path together with the first forming member.

[0010] Additionally, the first forming member preferably comprises a tubular inner body forming a second laser path in the longitudinal direction, an outer body provided externally to form a second gas path concentric with the inner body and communicating with the first gas path, a plurality of gas pressure reducing plates coupled to the outer surface of the outer body to communicate with the second gas path, and an exhaust body provided to allow the gas penetrating the gas pressure reducing plates, as well as the laser irradiated through the second laser path, to be discharged outside the laser welding torch so that welding can be performed.

[0011] In addition, the inner tube body includes a first projection, a second projection, and a third projection, wherein the first projection and the second projection are in contact with the inner surface of the outer tube body to form a second gas path, and the third projection is preferably fitted and coupled with the exhaust gas.

[0012] Additionally, the first protrusion is formed in the shape of a ring to ensure airtightness of the second gas path, and the second protrusion is preferably formed in a plurality of adjacent radial protrusions on the outer surface of the inner tube body so that gas introduced into the second gas path can be exhausted in one direction.

[0013] In addition, a plurality of gas distribution holes are radially formed on the outer surface of the outer body so that the first gas path and the second gas path are in communication with each other, and it is preferable that a fixing groove is formed between adjacent gas distribution holes to meet a fixing screw for pressurizing and fixing the outer body.

[0014] In addition, it is preferable that the gas pressure reducing plates are inserted through the outer surface of the outer body in a manner adjacent to each other, and that a plurality of exhaust holes are formed perforated on the outer surface of each gas pressure reducing plate so that gas supplied to the second gas path can pass through the exhaust body and be discharged.

[0015] Additionally, the exhaust body comprises a laser irradiation hole formed to communicate with a second laser path formed in the inner tube body, an exhaust plate formed as a pair adjacent to each other on the outer surface and having a plurality of discharge holes formed to communicate with a second gas path on the outer surface, and a fitting groove detachably fitted to the inner tube body, wherein the laser irradiation hole preferably has a structure in which the opening width gradually narrows in the direction in which the laser is irradiated.

[0016] Additionally, the second forming member comprises a front body that is detachably coupled to the torch front section and into which the first forming member is inserted, an intermediate body detachably coupled to the front body to surround the outer surface of the first forming member inserted into the front body, and a rear body detachably fitted to the outer surface of the first forming member inserted into the front body so as to be positioned in front of the intermediate body, wherein the front body preferably has a hollow portion to allow the first laser path and the second laser path to communicate with each other, a gas inlet hole to allow the first gas path and the second gas path to communicate with each other, and a pair of cooling water inlet holes formed to allow the first cooling circulation path and the second cooling circulation path to communicate with each other so that cooling water can circulate.

[0017] In addition, the outer surface of the rear body further comprises a ring assembly equipped with a pair of circulation pipes for forming a second cooling circulation path, wherein one side of each circulation pipe is connected to a pair of cooling water inlet holes and the other side is connected to a flow path formed inside the ring assembly so as to form a second cooling circulation path through which cooling water can circulate.

[0018] Additionally, the rear end of the torch is detachably coupled to the outer surface of the second forming member and further includes an auxiliary guide member for stably and movably supporting the laser welding torch on a welding target to perform laser welding, wherein the auxiliary guide member is coupled to the second forming member and preferably includes a guide body having at least one welding wire rotatably provided on its outer surface, and a bearing member having a pair of ball bearings rotatably provided on the upper and lower parts of the guide body, respectively.

[0019] Additionally, the laser welding torch further comprises an angle adjustment means detachably mounted on the outer surface of the second forming member to adjust the angle of the rear end of the torch, wherein the angle adjustment means preferably comprises an adjustment body having a curved shape and a plurality of angle adjustment holes formed in the longitudinal direction, a coupling body movably installed with respect to the adjustment body and adjusting the angle of the rear end of the torch connected to the front end of the torch, and a fastening screw for mutually fixing or releasing the angle-adjusted adjustment body and the coupling body.

[0020] In addition, at least one cooling pipe is formed on the outer surface of the torch shear section to allow cooling water supplied from the outside to circulate through the laser welding torch and be discharged, and it is preferable that the cooling pipe is formed on a plate that is connected to maintain airtightness after separation from the torch shear section.

[0021] According to the present invention, in contrast to the conventional method, the laser path and the gas path supplied from the outside for welding are configured to be mutually independent of each other until they are output to the outside through the exhaust gas. In particular, as the gas is discharged at a predetermined pressure through the exhaust gas, it is discharged after being depressurized through a gas pressure reduction plate, thereby preventing interference with the irradiation of a straight-line laser and enabling stable welding.

[0022] In addition, by providing an auxiliary guide part that is detachably mounted on the outer surface of the second forming member, which is different from the conventional method, laser welding is performed while being supported on the base material, thereby enabling more stable welding.

[0023] In addition, by equipping an angle adjustment means to adjust the laser welding torch to a desired angle, which is distinct from conventional methods, the effect of improving heat generation efficiency at the edges of the welding part during the laser welding process is realized.

[0024] FIG. 1 is a perspective view illustrating a laser welding torch with an improved laser irradiation function according to the present invention.

[0025] FIG. 2 is an exploded perspective view of FIG. 2.

[0026] FIG. 3 is a perspective view showing the rear end of the torch for FIG. 1.

[0027] Fig. 4 is an exploded perspective view of Fig. 3.

[0028] FIG. 5 is an exploded perspective view illustrating the first forming member of FIG. 3.

[0029] FIG. 6 is a perspective cross-sectional view of FIG. 5.

[0030] FIG. 7 is a drawing showing a gas pressure reducing plate for FIG. 5.

[0031] FIG. 8 is a drawing illustrating the exhaust gas for FIG. 5.

[0032] FIGS. 9 and FIGS. 10 are a perspective view and a cross-sectional view illustrating the tip body of FIG. 3.

[0033] FIGS. 11 and FIGS. 12 are a perspective view and a cross-sectional view illustrating an intermediate body of FIG. 3.

[0034] FIG. 13 is a perspective view illustrating the rear body of FIG. 3.

[0035] FIG. 14 is a perspective view illustrating a flow path formed in a ring assembly for FIG. 13.

[0036] FIG. 15 is a cross-sectional view of the first and second forming members of FIG. 3.

[0037] FIG. 16 is a drawing illustrating an auxiliary guide section for FIG. 3.

[0038] FIG. 17 is a diagram showing the usage state of the auxiliary guide part for FIG. 16.

[0039] FIG. 18 is an operational diagram of a laser welding torch with an improved laser irradiation function according to the present invention.

[0040] FIG. 19 is a drawing showing an angle adjustment means for a laser welding torch with an improved laser irradiation function according to the present invention.

[0041] FIG. 20 is an exploded perspective view illustrating an angle adjustment means for FIG. 19.

[0042] FIG. 21 is an operational relationship diagram for FIG. 10.

[0043] FIG. 22 is a drawing illustrating another embodiment of a cooling water pipe for a laser welding torch with an improved laser irradiation function according to the present invention.

[0044] Hereinafter, a laser welding torch with an enhanced laser irradiation function according to the present invention (hereinafter briefly referred to as the "laser welding torch") will be described in detail with reference to the attached drawings.

[0045] First, as illustrated in FIGS. 1, 2 and 18, the laser welding torch (1) according to the present invention comprises a torch front end (100) and a torch rear end (200) that is detachably connected to the torch front end (100), and the overall structure forms a gun type so that the user can easily grip it.

[0046] To explain in more detail, the torch front section (100) provides a passage through which high-temperature laser and gas supplied from the outside can be supplied to the torch rear section (200) described later, and a first cooling circulation path (W1) is formed inside to allow cooling water to circulate to exchange heat with the laser.

[0047] To this end, the torch shear section (100) includes an outer body (110) and an inner body (120).

[0048] For example, a trigger (not shown) for operating the laser welding torch (1) of the present invention is formed on the outer surface of the outer body (110), and a hollow portion is formed in the longitudinal direction so that the inner body (120) can be inserted and installed inwardly.

[0049] The lower part of the outer body (110) is provided with a connection socket (111) for connecting to a laser supply device (not shown), and a plurality of cooling water pipes (113) are formed so that cooling water can be supplied in a circulating manner.

[0050] For example, a pair of cooling water pipes (113) are provided so that supply and circulation can be performed. To this end, one of the cooling water pipes (113) is formed to be in communication with the first cooling circulation path (W1) so that the cooling water, which has undergone heat exchange through the second cooling circulation path (W2) described later, can satisfy the circulation structure through the other cooling water pipe (113).

[0051] A gas supply pipe (not shown) is provided on the outer surface of the outer body (110) adjacent to a pair of cooling water pipes (113), and the gas supply pipe is connected to a gas supply device (not shown) to receive gas necessary for welding.

[0052] Meanwhile, as illustrated, the cooling water pipes (113') are formed as a pair on a plate (115) that can be opened and closed on the outer surface of the torch front section (100), so that the cooling water can circulate within the laser welding torch (1) according to the present invention through the pair of cooling water pipes (113') (see FIG. 22).

[0053] To this end, the cooling water pipe (113') formed in the plate (115) is installed in the torch front section (100) to communicate with the first and second cooling circulation paths (W1, W2), as well as the circulation pipe (273) described later and the passage (H) connected to the pipe.

[0054] At this time, it is preferable that the plate (115) which is connected to the torch shear section (100) be connected in such a way that airtightness is maintained by a sealing member (117), such as a gasket.

[0055] The gas supply pipe is connected to a first gas path (G1), and the first gas path (G1) is connected to a second gas path (G2) formed at the rear end of the torch (200) described later, so that the gas is discharged to have a predetermined discharge pressure so as not to interfere with the laser, thereby enabling laser welding to be performed.

[0056] Additionally, as described above, the inner body (120) is formed in a tubular shape that is inserted through a hollow portion formed inside the outer body (110), thereby forming a first laser path (L1) through which a laser supplied through a connecting socket (111) can move into the inner body (120).

[0057] Here, the first laser path (L1) is formed to be connected to the second laser path (L2) formed inside the rear end of the torch (200), which will be described later, as shown in the illustration.

[0058] To this end, a bending mirror (121) for reflecting the supplied laser is placed inside the inner body (120), as well as a plurality of lenses (123) are arranged adjacent to each other in the longitudinal direction to enable the focusing of the laser, and since this is the same as a conventional laser welding device, a detailed structural description is omitted.

[0059] Meanwhile, the outer body (110) and inner body (120) constituting the torch shear section (100) in the present invention are made of aluminum material to satisfy lightweighting.

[0060] And, as shown in FIG. 3 and FIG. 4, the torch rear end (200), which is the gist of the present invention, includes a first forming member (200a) and a second forming member (200b) configured to guide the laser and gas supplied to the first laser path (L1) and the first gas path (G1) formed in the torch front end (100) above so that they can be output outside the torch rear end (200) without interfering with each other (see FIG. 18).

[0061] For example, as shown in FIGS. 5 to 8, the first forming member (200a) includes an inner body (211), an outer body (220), a gas pressure reducing plate (230), and an exhaust body (240) in a configuration for forming an independent second gas path (G2) that communicates with the first gas path (G1) so that airtightness can be maintained through the assistance of the second forming member (200b) described later.

[0062] As illustrated, the inner body (211) is formed into the shape of a tube with both sides open overall, and can form a second laser path (L2) in the longitudinal direction on the inside, and a plurality of protrusions (213, 215, 217) are formed on the outer surfaces of both sides.

[0063] Here, the protrusions include a first protrusion (213), a second protrusion (215), and a third protrusion (217), wherein the first protrusion (213) is formed to protrude from one side of the inner tube body (211) so as to be press-fitted with the inner surface of the outer tube body (220).

[0064] The second projection (215) is formed to protrude radially in multiple numbers on the other side of the inner tube body (211), and is press-fitted with the inner surface of the outer tube body (220) so that, together with the first projection (213), a second gas path (G2) is formed that communicates with the first gas path (G1) in the longitudinal direction between the outer surface of the inner tube body (211) and the inner surface of the outer tube body (220).

[0065] Here, the reason the second protrusion (215) is formed radially is to enable the movement of gas from the first protrusion (213) toward the second protrusion (215), and furthermore, the reason the first protrusion (213) forms the shape of a flange is to prevent the loss of gas introduced into the second gas path (G2) so that the entire amount can be moved toward the second protrusion (215).

[0066] At this time, it is preferable to mold the protrusion height of the first projection (213) and the protrusion height of the second projection (215) to have the same height so that the second gas path (G2) is formed while being press-fitted with the inner surface of the outer body (220).

[0067] As shown in the illustration, the third projection (217) is formed to protrude from the other end of the inner tube body (211) and is coupled in a press-fit manner with the fitting groove (243) formed on one side of the exhaust body (240) to help the exhaust body (240) be stably coupled.

[0068] As described above, the outer body (220) is inserted in a concentric manner to wrap around the outer surface of the inner body (211) to form a second gas path (G2), and for this purpose includes a gas distribution hole (221), a fixing groove (223), and a flange (225), and is inserted and installed in a hollow portion to maintain airtightness with the tip body (250) to be described later.

[0069] Gas distribution holes (221) are formed by perforating one side of the outer body (220) so as to be located above the first projection (213), and are formed radially in multiple numbers so that the incoming gas can move smoothly through the second gas path (G2).

[0070] As described above, the fixing groove (223) is formed to have a groove shape between adjacent gas distribution holes (221), and satisfies a structure in which the outer body (220) and the tip body (250) can be mutually fixed through the pressure of a fixing screw (10) that is screw-coupled with a fixing hole (253) formed in the tip body (250) constituting the second forming member (200b) to be described later.

[0071] At this time, it is preferable that each of the above-described gas distribution holes (221) and fixing grooves (223) be molded to have the shape of an elongated hole.

[0072] The flange (225) is formed to have a ring shape on the other side of the outer body (220) so as to be positioned above the second projection (215), and the insertion length of the gas pressure reducing plate (230), which is inserted through to be fitted onto the outer surface of the other side of the inner body (211), can be controlled.

[0073] To this end, the length of the outer body (220) is formed to be shorter than the length of the inner body (211) described above, so that a plurality of gas pressure reducing plates (230) can be fitted together so that they come into contact with the flange (225) while the inner body (211) is inserted into the outer body (220) in a concentric manner.

[0074] As shown in the illustration, the gas pressure reducing plate (230) is formed in the shape of a disc having a predetermined diameter, and a hollow portion is formed so that the central part of the diameter can be inserted through the outer surface of the inner tube body (211) and fitted together.

[0075] A gas pressure reduction plate (230) is inserted through the outer surface of the inner tube body (211) so that a plurality of components are spaced apart from each other, and a plurality of exhaust holes (231) are formed radially on the outer surface of each gas pressure reduction plate (230), satisfying a structure in which gas moving through the second gas path (G2) can be smoothly reduced in pressure and move to the exhaust body (240).

[0076] That is, when gas is introduced through the second gas path (G2), the pressure is reduced as it passes through each of the gas pressure reduction plates (230) and supplied to the exhaust gas (240), thereby preventing interference with the straightness of the laser irradiated from the laser welding torch (1).

[0077] As described above, the exhaust gas (240) is fitted and connected to the other side of the inner tube body (211) so as to communicate with the second laser path (L2), allowing the laser to be irradiated and the gas passing through the exhaust hole (231) to be discharged to the outside without interfering with the laser.

[0078] To this end, the exhaust body (240) may have a laser irradiation hole (247) formed longitudinally in communication with the second laser path (L2), and a pair of exhaust plates (241) may be formed adjacent to each other on the outer surface, each having a plurality of discharge holes (245) formed opposite to the exhaust hole (231).

[0079] In addition, the exhaust body (240) has a fitting groove (243) formed therein so that movement can be prevented when it is fitted together with the inner body (211), and the fitting groove (243) is coupled with a third projection (217) formed on the inner body (211) in a shape-matched manner.

[0080] In addition, as shown in FIGS. 9 to 15, the second forming member (200b) is provided outside the first forming member (200a) described above and includes a front body (250), an intermediate body (260), and a rear body (270) in a configuration to form a second cooling circulation path (W2) that communicates with the first cooling circulation path (W1) formed in the torch front section (100), as well as to improve fixing force.

[0081] As illustrated, the tip body (250) is detachably connected to the torch tip section (100) so that the first laser path (L1) and the second laser path (L2) of the first forming member (200a) are connected to each other. To this end, a hollow section (second laser path) is formed on the outer surface to insert an outer body (220) equipped with an O-ring (O) constituting the first forming member (200a).

[0082] At this time, it is preferable that a plurality of wings (251) are radially formed at the end of the hollow portion into which the first forming member (200a) is inserted to guide the center of the first forming member (200a), which is formed in a cylindrical tube shape, to coincide with the center of the hollow portion.

[0083] In addition, a fixing groove (223) for screw coupling with a fixing screw (10) is formed on the outer surface of the tip body (250), so that the first forming member (200a) inserted into the hollow part can be pressurized and fixed through coupling with the fixing screw (10).

[0084] A gas inlet hole (255) is formed on one side of a tip body (250) that is coupled to contact the torch tip section (100), and the gas introduced through the gas inlet hole (255) is supplied to a second gas path (G2) formed in the first forming member (200a).

[0085] Furthermore, the outer surface of the front body (250) has a pair of cooling water inlet holes (257) formed separately from the gas inlet hole (255) and communicating with the first cooling circulation path (W1) formed in the front section (100) of the torch, and the cooling water inlet holes (257) satisfy a structure that is connected to a pair of circulation pipes (273) provided in the rear body (270) to be described later.

[0086] The intermediate body (260) is formed in the shape of a tube with both sides open and is inserted to surround the outer surface of the first forming member (200a) inserted into the tip body (250), and the open side is fitted together with the tip body (250) to protect the first forming member (200a) from the outside and maintain a stable fixed state.

[0087] A first fitting ring (283), which will be described later, is detachably connected to the outer surface of the intermediate body (260).

[0088] The rear body (270) is formed into the shape of a tube with both sides open, similar to the intermediate body (260) described above, and is inserted and installed to surround the outer surface of the first forming member (200a) so as to be positioned in front of the intermediate body (260) (in the direction in which the laser is irradiated).

[0089] At this time, it is preferable that the rear body (270), which is inserted and installed to surround the first forming member (200a), is inserted and installed so that the exhaust body (240) does not protrude outside the rear body (270).

[0090] In addition to the above, the rear body (270) may further include a ring assembly (271) that is circulatingly connected to a pair of cooling water inlet holes (257) as described above and forms a second cooling circulation path (W2), and the ring assembly (271) includes a pair of circulation pipes (273).

[0091] The ring assembly (271) is formed to wrap around the outer surface of the rear body (270), and a flow path (H) connected to a pair of circulation tubes (273) is formed inside.

[0092] As shown in the illustration, a pair of circulation pipes (273) are connected to the ring assembly (271) on one side each so as to be in communication with the flow path, and each other side is individually connected to a pair of cooling water inlet holes (257) to form a second cooling circulation path (W2) together with the flow path so that heat exchange with the high-temperature laser can be performed.

[0093] In addition, it should be noted that the nozzle constituting the rear body (270) in the present invention may be opened in a circular shape as shown in FIG. 14, as well as in an elliptical shape, and may also be opened in another shape as needed.

[0094] Meanwhile, as shown in FIGS. 16 and 17, the torch rear end (200) of the present invention may further include an auxiliary guide part (200c) that is detachably fitted and coupled to the outer surface of the rear end body (270) described above, and which can perform welding while moving stably along the object to be welded during welding.

[0095] To this end, the auxiliary guide section (200c) includes a guide member (280) and a pair of bearing members (290).

[0096] The guide member (280) is detachably coupled to the rear body (270) and includes a guide body (281) and a first fitting ring (283) configured to accommodate a pair of bearing members (290) as well as a welding wire (285) required for welding.

[0097] As illustrated, the guide body (281) is provided with bearing members (290) installed at the top and bottom respectively, and a pair of welding wires (285) are rotatably provided on one or both sides.

[0098] A first fitting ring (283) is formed on the upper part of the guide body (281) to be detachably coupled to the outer surface of the rear body (270).

[0099] Here, the first fitting ring (283) is formed in the shape of a ring with a hollow portion formed inside, as described above, and satisfies a structure in which the diameter of the hollow portion can be varied by screw adjustment for ease of separation and connection with the outer surface of the rear body (270).

[0100] As illustrated, the bearing member (290) includes a first bearing (291) provided on the upper part of the guide body (281) and a second bearing (293) provided on the lower part, so that they can be individually installed on the upper and lower parts of the guide body (281).

[0101] One side of each of the first and second bearings (291, 293) can be installed in a structure that allows for separation or length adjustment by bolting to the guide body (281), and a rotatable ball is formed on the other side of each to be supported on the object to be welded, thereby helping the laser welding torch (1) according to the present invention to move stably and perform laser welding (see FIG. 18).

[0102] Meanwhile, it should be noted that in the guide member (280) of the present invention, as illustrated, one of the pair of bearings (291, 293) may be omitted, and a roller (R) that is rotatably supported on the workpiece to be welded may be mounted on the guide body (281) and used in place of the omitted bearing (291).

[0103] Furthermore, as illustrated in FIGS. 19 to 20, the laser welding torch (1) according to the present invention may further include an angle adjustment means (300), and the angle adjustment means (300) includes an adjustment body (310), a coupling body (320), a fastening screw (330), and a second fitting ring (327).

[0104] Here, the second fitting ring (327) is configured to have the same structure as the first fitting ring (283) described above so that the angle adjustment means (300) and the torch rear end (200) can be mounted so as to be mutually detachable, and a detailed description of the structure is omitted so as not to obscure the gist of the present invention.

[0105] As described above, the adjustment body (310) is formed in a curved shape, and a plurality of angle adjustment holes (311) are formed along the length direction to form a movement path that allows the angle of the laser welding torch (1) according to the present invention to be adjusted to a desired direction and angle.

[0106] To this end, a first fastening hole (313) is formed on the outer surface of the adjustment body (310) to be detachably fastened to the guide body (281), and the first fastening hole (313) is assembled to the guide body (281) through a fastening screw (330).

[0107] As illustrated, the connecting body (320) is molded into an overall 'U' shape so that an inlet groove (321) is formed to allow it to slide while guided by the adjusting body (310).

[0108] At this time, it is preferable that the inner surface of the inlet groove (321) in contact with the adjustment body (310) be molded to have a curved shape so that it can slide in contact with the adjustment body (310) in a shape-matched manner, and for this purpose, the coupling body (320) itself may also be molded into an arc shape.

[0109] A coupling hole (323) may be formed protrudingly on the outer surface of the coupling body (320), and the coupling hole (323) may be detachably coupled to the second fitting ring (327) by a fastening screw (330), thereby making it possible to use the laser welding torch (1) without the angle adjustment means (300) on the outer surface.

[0110] In addition, one or more second fastening holes (325) are formed on the outer surface of the coupling body (320), and the second fastening holes (325) are positioned opposite to the first fastening holes (313) formed in the adjusting body (310), and the adjusting body (310) and the coupling body (320) are fixed to each other so as to adjust the angle through the insertion of a fastening screw (300).

[0111] Thus, as illustrated in FIG. 18 and FIG. 21, when laser welding is performed in a state where the angle adjustment means (300) according to the present invention is not installed (see FIG. 18), less heat is generated on the edge portion of the welding area. However, by adjusting the angle of the laser welding torch (1) through the angle adjustment means (300), it is possible to perform welding on a wide area of ​​the edge portion, thereby having the advantage of generating a high amount of heat.

[0112] As described above, the laser welding torch (1) according to the present invention is configured such that, unlike conventional methods, the laser and gas supplied from the outside for welding have mutually independent structures for the laser path and the gas path until they are output to the outside through the exhaust body (240). In particular, as the gas is discharged at a predetermined pressure through the exhaust body (240), it is discharged with reduced pressure through the gas pressure reduction plate (230), thereby preventing interference with the irradiation of the straight-line laser and allowing for stable welding.

[0113] In addition, by providing an auxiliary guide part (200c) that is detachably mounted on the outer surface of the second forming member (200b) in a manner distinct from conventional methods, the laser welding is performed while being supported on the base material, thereby enabling more stable welding.

[0114] In addition, by mounting an angle adjustment means (300) that is different from the conventional method, the laser welding torch (1) is adjusted to a desired angle, thereby achieving the effect of improving the heat generation efficiency at the edge of the welding part during the laser welding process.

Claims

1. In a laser welding torch for welding, The above laser welding torch A torch front section (100) having a first laser path (L1) through which the laser travels and a first gas path (G1) through which the gas travels formed independently of each other, with a first cooling circulation path (W1) formed inside for heat exchange between the cooling water and the laser; and A torch rear end (200) formed with a second laser path (L2) communicating with a first laser path (L1), a second gas path (G2) communicating with a first gas path (G1), and a second cooling circulation path (W2) communicating with a first cooling circulation path (W1); wherein A laser welding torch with an improved laser irradiation function, characterized in that the rear end of the torch (200) comprises a first forming member (200a) that forms a second laser path (L2) and a second gas path (G2) so as not to interfere with each other until the laser and gas are output outside the laser welding torch, and a second forming member (200b) that forms a second cooling circulation path (W2) while maintaining the airtightness of the second gas path (G2) together with the first forming member (200a).

2. In Paragraph 1, The first forming member (200a) above is A tubular inner body (211) forming a second laser path (L2) in the longitudinal direction; An outer body (220) provided on the outside to form a concentric circle with the inner body (211) and forming a second gas path (G2) that communicates with the first gas path (G1); A plurality of gas pressure reducing plates (230) coupled to the outer surface of the outer body (220) so as to be in communication with the second gas path (G2); and A laser welding torch with an improved laser irradiation function, characterized by including an exhaust gas (240) provided so that the gas penetrating the gas pressure reduction plate (230), as well as the laser irradiated through the second laser path (L2), can be discharged outside the laser welding torch to perform welding.

3. In Paragraph 2, The above inner body (211) includes a first projection (213), a second projection (215), and a third projection (217), A laser welding torch with an improved laser irradiation function, characterized in that the first projection (213) and the second projection (215) are in contact with the inner surface of the outer body (220) to form a second gas path (G2), and the third projection (217) is fitted and coupled with the exhaust body (240).

4. In Paragraph 3, A laser welding torch with improved laser irradiation function, characterized in that the first projection (213) is formed in the shape of a ring to ensure airtightness of the second gas path (G2), and the second projection (215) is formed radially and adjacently on the outer surface of the inner tube body (211) so that gas introduced into the second gas path (G2) can be exhausted in one direction.

5. In Paragraph 2, On the outer surface of the above outer body (220) A plurality of gas distribution holes (221) are formed radially so that the first gas path (G1) and the second gas path (G2) are connected to each other, and A laser welding torch with improved laser irradiation function, characterized in that a fixing groove (223) is formed between adjacent gas distribution holes (221) to which a fixing screw (10) for pressurizing and fixing the outer body (220) meets.

6. In Paragraph 2, The above gas pressure reducing plate (230) A laser welding torch with an improved laser irradiation function, characterized in that a plurality of exhaust holes (231) are drilled and formed on the outer surface of each gas pressure reduction plate (230) so that gas supplied to the second gas path (G2) can pass through the exhaust body (240) and be discharged.

7. In Paragraph 2, The above exhaust gas (240) A laser irradiation hole (247) formed to communicate with a second laser path (L2) formed in the inner body (211); An exhaust plate (241) formed as a pair adjacent to each other on the outer surface, with a plurality of exhaust holes (245) formed perforated on the outer surface to communicate with the second gas path (G2); and It includes a fitting groove (243) that is detachably fitted and coupled to the inner body (211) above, but, A laser welding torch with improved laser irradiation function, characterized in that the above-mentioned laser irradiation hole (247) has a structure in which the opening width gradually narrows in the direction in which the laser is irradiated.

8. In Paragraph 1, The above second forming member (200b) is A tip body (250) that is detachably coupled to the torch shear section (100) above, with the first forming member (200a) inserted into the inside; An intermediate body (260) that is detachably coupled to the tip body (250) to surround the outer surface of the first forming member (200a) inserted into the tip body (250); and A rear body (270) that is detachably fitted and coupled to the outer surface of a first forming member (200a) inserted into the front body (250) so as to be positioned in front of the intermediate body (260); wherein A laser welding torch with improved laser irradiation function, characterized in that the tip body (250) has a hollow portion so that a first laser path (L1) and a second laser path (L2) can communicate with each other, a gas inlet hole (255) so that a first gas path (G1) and a second gas path (G2) can communicate with each other, and a pair of cooling water inlet holes (257) so that a first cooling circulation path (W1) and a second cooling circulation path (W2) can communicate with each other to allow cooling water to circulate.

9. In Paragraph 8, The ring assembly (271) is further provided with a pair of circulation pipes (273) for forming a second cooling circulation path (W2) on the outer surface of the rear body (270); A laser welding torch with an improved laser irradiation function, characterized in that one side of each circulation pipe (273) is connected to a pair of cooling water inlet holes (257), and the other side is connected to a flow path formed inside the ring assembly (271) so that a second cooling circulation path (W2) can be formed through which cooling water can circulate.

10. In Paragraph 1, The above torch rear end (200) The invention further includes an auxiliary guide part (200c) that is detachably coupled to the outer surface of the second forming member (200b) and is stably and movably supported on the object to be welded so as to perform laser welding; A laser welding torch with an improved laser irradiation function, characterized in that the auxiliary guide part (200c) is coupled with the second forming member (200b) and includes a guide body (281) having at least one welding wire (285) rotatably provided on its outer surface, and a bearing member (290) having a pair of ball bearings rotatably provided on the upper and lower parts of the guide body (281).

11. In Paragraph 1, The above laser welding torch The angle adjustment means (300) is further included to be detachably mounted on the outer surface of the second forming member (200b) to adjust the angle of the rear end (200) of the torch; The above angle adjustment means (300) is A laser welding torch with an improved laser irradiation function, characterized by comprising: a control body (310) formed in a curved shape and having a plurality of angle adjustment holes (311) formed in the longitudinal direction; a coupling body (320) movably installed with the control body (310) and adjusting the angle of the torch rear end (200) connected to the torch front end (100); and a fastening screw (300) for mutually fixing or releasing the control body (310) and the coupling body (320) with the angle adjusted.

12. In Paragraph 1, A laser welding torch with improved laser irradiation function, characterized in that at least one cooling pipe (113') is formed on the outer surface of the torch shear section (100) to allow cooling water supplied from the outside to circulate and discharge through the laser welding torch, and the cooling pipe (113') is formed on a plate (115) that is connected to maintain airtightness after separation from the torch shear section (100).

Images