Gun-type laser welding torch having safety means

Abstract

The present technology relates to a welding torch that can prevent worker safety accidents by achieving weight reduction through omitting unnecessary parts and using different materials for components constituting a manual laser welding torch which a worker can grip to weld a base material by using laser. More specifically, a gripping part comprises: a gripping body having a laser movement path therein, and having a movement path along which water circulates to cool multiple lenses provided inside the gripping part, a movement path along which gas can be discharged via a laser emission part, and a space part for reducing the weight of the welding torch, formed independently of each other, a gripping case being mounted on the outer surface of the gripping body; and a safety means mounted on the gripping case and the laser emission part so as to not only control the operation of a trigger that determines whether to emit laser, but also block the diffuse reflection of laser emitted to the outside through the laser emission part.

Description

Gun-type laser welding torch equipped with safety measures

[0001] This technology relates to a welding torch that can prevent safety accidents for workers by omitting unnecessary parts and reducing weight by using different materials for components that constitute a manual laser welding torch that allows workers to hold and weld a base material using a laser.

[0002] A variety of machine tools are used to process base materials. Various types of machine tools, including lathes, milling machines, and drilling machines, can be used to process base materials. Using one or more machine tools can produce a wider variety of products tailored to specific needs.

[0003] In addition to contact processing devices that process by bringing cutting blades into contact with the base material, machine tools are also widely used, as are non-contact processing devices that process by irradiating the base material with a high-temperature laser beam.

[0004] Laser processing devices are designed to generate, focus, and irradiate laser light toward the workpiece surface of a base material. Laser processing devices are highly useful in industrial settings because they produce smooth surfaces, operate quietly, and enable precise and fine processing.

[0005] A head with a light nozzle is formed at the portion of the laser processing device facing the substrate, and an optical system comprising a number of lenses is provided inside the head. Accordingly, focused laser light can be irradiated from the optical system through the nozzle onto the substrate.

[0006] Meanwhile, in the case of the above-mentioned conventional laser processing device for welding, there are cases where it is installed and used on a robot arm, but it is also used in one of the gun type forms where the worker holds it and directly welds the base material.

[0007] In particular, the installation of a robot arm is considered expensive equipment and the economic burden of maintenance is considerable, so manual methods are still prevalent. However, since the weight of the laser processing device is generally manufactured to be over 2 kg, there is a concern that safety accidents may occur due to the burden on the worker's joints, such as the wrist, when working with it for a long time.

[0008] In addition, the conventional technology has a problem in that there is no configuration that can prevent safety accidents from occurring due to lasers being scattered through base materials, especially base materials with high reflectivity such as aluminum, during the process of performing laser welding.

[0009] In order to solve the above-described conventional problems, the present invention aims to provide a laser processing device that can prevent safety accidents to workers by reducing the weight of the laser processing device by boldly omitting unnecessary parts that contribute to the weight of the laser processing device that is directly held and used by workers.

[0010] In addition, another purpose is to block the laser that is reflected externally during the welding process, thereby preventing safety accidents for workers.

[0011] In order to solve the problem of the conventional art described above, a gun-type laser welding torch equipped with a safety means according to the present invention is a laser welding torch in which a gripping part (100), a laser irradiation part (200), and a wire supply part (400) are assembled in a gun type (GUN Type) and a laser is irradiated toward a base material through a plurality of lenses provided inside the torch, wherein the gripping part (100) forms a laser movement path (L / L) inside the torch, and in addition to a movement path through which water circulates for cooling a plurality of lenses provided inside the gripping part (100) and a movement path through which gas can be discharged through the laser irradiation part (200), a space part for reducing the weight of the welding torch is formed independently of each other, and a gripping body (110) on the outer surface of which a gripping case (150) is mounted, and a trigger (151) mounted on the gripping case (150) and the laser irradiation part (200) for determining whether to irradiate the laser, It is characterized by including a safety means (300) that blocks the diffuse reflection of a laser irradiated to the outside through the irradiation unit (200).

[0012] In addition, the laser irradiation unit (200) includes a connecting body (210) that is coupled to one side of the grip body (110) and has a hollow portion formed on the outer surface that communicates with the laser movement path (L / L) and a gas discharge hole formed in communication with the gas movement path (G / L) formed in the second grip body (112), a cylindrical nozzle base (220) that is coupled to the laser movement path (L / L) and has a hollow portion formed in the longitudinal direction for gas discharged through the gas discharge hole to move together with the laser, and a cap (230) that is detachably coupled to the nozzle base (220) so that the gas discharged through the nozzle base (220) can be concentrated and discharged on the processing surface of the base material, and the nozzle bases (220) are preferably fixedly connected to each other by a bushing (221), and a blank space is formed on the outer surface of the bushing (221).

[0013] In addition, it is preferable that the cap (230) having an opening (237) formed at the output end for irradiating the laser to the outside and communicating with the laser path (L / L) be used by selectively replacing either the first cap (231) including the first protrusion (233) used when a pair of adjacent base material processing surfaces are flat, or the second cap (232) including the second protrusion (234) formed to protrude in the direction in which the laser is emitted from the first protrusion (233) used when a pair of adjacent base material processing surfaces are folded corners.

[0014] In addition, it is preferable that a third protrusion (235) be further formed on the lower surface of the first protrusion (233) or the second protrusion (234) to be inserted into the gap between a pair of adjacent parent materials.

[0015] In addition, it is preferable that the safety means (300) include a first safety member (310) that is manually controlled to block the operation of the micro switch (153) by pressing a trigger (151) that is rotatably mounted on the phage case (150), a rotary member (236) formed on the outer surface of the laser irradiation unit (200), and a second safety member (320) that is rotatably mounted and blocks laser that is reflected through the base material.

[0016] In addition, it is preferable that the first safety member (310) includes a lock switch (311) that slides by the elastic force of an elastic body (C / S) inside the trigger (151) and a pressure switch (313) mounted on the grip case (150) that pressurizes the lock switch (311) by the elastic force of the elastic body (C / S) when the lock switch (311) moves to prevent the trigger (151) from rotating.

[0017] In addition, the second safety member (320) includes a blocking member (321) that is rotatably coupled with a rotating member (236) and a roller (323) equipped with a bearing (325) that is rotatably coupled with the rotating member (236) so that a pair of them face each other, and it is preferable that the rotation of the blocking member (321) is rotated in the up-and-down direction so that the opening (237) of the laser irradiation unit (200) where the laser is irradiated can be opened and closed depending on whether or not it is in contact with the base material.

[0018] In addition, the inner surface of the blocking body (321) is formed with an embossing pattern, and a plurality of grooves (327) are formed so that the laser reflected through the base material is reflected at least once inside the blocking body (321), and it is preferable that the grooves (327) are formed in a hemispherical shape.

[0019] In addition, the above-mentioned phage body (110) includes a circulation path (W / L) through which water circulates for cooling the lens, and a gas path (G / L) through which gas can be discharged through the laser irradiation unit (200). However, it is preferable that at least one of the circulation path (W / L) and the gas path (G / L) is formed through a pipe section (140) each having a pipe (PIPE) shape.

[0020] In addition, the circulation path (W / L) includes a connecting pipe (143) that connects a pair of the pipe sections (140) so that they can circulate with each other, and a connecting pipe (145) that connects the connecting pipe (143) and the pipe section (140). However, it is preferable that the pipe section (140) and the connecting pipe (143) are installed through casting of the grip body (110) after bending processing before being mounted on the grip body (110).

[0021] According to the present invention, unlike the conventional method, the circulation path, gas transfer path, and flow path can be formed integrally in the grip section, so that unnecessary parts that contribute to the weight are reduced, thereby enabling weight reduction.

[0022] In addition, unlike conventional methods, it has the effect of preventing safety accidents for workers by controlling the operation of the trigger through safety measures and blocking the laser reflected on the base material.

[0023] Figure 1 is a drawing showing a gun-type laser welding torch equipped with a safety means according to the present invention.

[0024] FIGS. 2A to 2C are drawings showing the laser path, circulation path, and gas path formed in the first holder for FIG. 1.

[0025] Figure 3 is a drawing showing a pipe section inserted into the circuit of Figure 2.

[0026] Figure 4 is a drawing showing the process of forming a circuit by casting joining for a gun-type laser welding torch equipped with a safety means according to the present invention.

[0027] Figure 5 is a drawing showing the process of forming a circuit by welding for a gun-type laser welding torch equipped with a safety means according to the present invention.

[0028] Fig. 6 is a drawing illustrating a hybrid fastening method between the first and second grippers of Fig. 1.

[0029] FIGS. 7a and 7b are drawings showing a first safety member for a gun-type laser welding torch equipped with a safety means according to the present invention.

[0030] FIGS. 8a and 8b are drawings showing a second safety member for a gun-type laser welding torch equipped with a safety means according to the present invention.

[0031] FIG. 9 is a drawing showing a first cap having a first protrusion formed therein for a gun-type laser welding torch equipped with a safety means according to the present invention.

[0032] Fig. 10a is a plan view of Fig. 9.

[0033] Fig. 10b is a drawing showing a welding area of ​​a parent material in which a gap for welding is formed using the second protrusion for Fig. 9.

[0034] Fig. 11 is a drawing showing another embodiment of the second protrusion for Fig. 9.

[0035] Figure 12a is a drawing showing a front view and a plan view of Figure 11.

[0036] Fig. 12b is a drawing showing a welding area of ​​a parent material in which a gap for welding is formed using a second protrusion of another embodiment for Fig. 11.

[0037] FIG. 13 is a drawing showing a first cap with the second protrusion omitted for a gun-type laser welding torch equipped with a safety means according to the present invention.

[0038] Figure 14a is a plan view of Figure 13.

[0039] Fig. 14b is a drawing showing a welding area of ​​a parent material in which a gap for welding is formed using the first cap of Fig. 13.

[0040] Fig. 15 is another embodiment of a pipe section provided in the grip body of Fig. 3.

[0041] Fig. 16 is a side view of Fig. 15.

[0042] Fig. 17a is a drawing showing a cross-section AA for Fig. 16.

[0043] Figure 17b is a drawing showing a BB cross-section for Figure 16.

[0044] Hereinafter, a gun-type laser welding torch (hereinafter, simply referred to as “welding torch”) equipped with a safety means according to the present invention will be described in detail with reference to the attached drawings.

[0045] First, as shown in FIGS. 1 to 2c, the welding torch (1) according to the present invention includes a gripping portion (100) having a gun-like shape, a laser irradiation portion (200), a safety means (300), and a wire supply portion (400) that supplies wire required for welding.

[0046] Before the explanation, the gripping part (100) is a conventional gun torch that is formed in a gun type with a hybrid structure in which a gripping member (110) including a first gripping body (111) and a second gripping body (112) are integrally or separately fastened, as shown in FIGS. 1 and 6, and includes a servo motor (130) that includes a bending mirror (131) inside, and a lens insert (120) that is separable from the second gripping body (112) and has a lens inside, and the wire supply part (400) is configured as a conventional wire supply part (400) that is rotatably coupled to the outer surface of the gripping part (100) and the laser irradiation part (200). Therefore, a detailed description thereof will be omitted so that the gist of the present invention can be clearly understood.

[0047] To explain in more detail, the laser irradiation unit (200) is configured to irradiate the laser reflected by the above-described plurality of lenses and bending mirrors in the direction of the base material to perform welding as illustrated in FIG. 1, and at the same time, the gas supplied through the gas path (G / L) is discharged together to block the inflow of foreign substances such as dust into the inside of the welding torch (1) according to the present invention during the welding process, and includes a connecting body (210), a nozzle base (220), and a cap (230).

[0048] For example, as shown in the drawing, the connector (210) has a hollow portion and a gas exhaust hole formed on the outer surface to communicate with the laser path (L / L) and the gas path (G / L) that start from the first gripper (111) and extend to the second gripper (112), respectively.

[0049] At this time, it is preferable that the connecting body (210) form a blank space in an unnecessary part that does not interfere with the gas discharge hole as well as the hollow part, so as to help reduce the weight of the welding torch (1) according to the present invention.

[0050] In addition, a ring portion is formed at the bottom of the connecting body (210) to satisfy a structure that is rotatable and connected through a wire welding portion (400) and a link, etc.

[0051] In addition, the nozzle (220) is formed in the shape of a pipe (PIPE) having a hollow portion in the longitudinal direction, and one side is connected to the laser path (L / L) so as to be connected, and the other side is installed so as to be fixedly connected to the cap (230) by a bushing.

[0052] At this time, the nozzle unit (220) is fixedly connected to the connecting body (210) by a pipe-shaped bushing, but it is preferable to connect the nozzle unit (220) in a form of a forced fit through a number of radially formed cutouts on the outer surface of the bushing into which the nozzle unit (220) is inserted so that the opening width can be varied.

[0053] In addition, a blank space (S) is formed on the outer surface of the bushing to help reduce the weight of the welding torch (1) of the present invention.

[0054] In addition, the cap (230) is connected to the other side of the nozzle base (220) so as to be in communication with the hollow part of the nozzle base (220), and the opening width of the opening connected to the nozzle base (220) is formed in a shape that is narrower in the longitudinal direction compared to the opening width of the other side, so that the laser and gas can be irradiated and emitted through the hollow part of the nozzle base (220) so as to be concentrated on the processing surface of the base material.

[0055] In the present invention, as shown in the drawing, the cap (230) can be applied to adjacent parent materials (O) with a gap (D) so that when the welding part is a flat surface or a corner (edge), different caps (230) can be applied. To this end, the cap (230) can be detachably connected to the nozzle base (220) so that a first cap (231) for welding a flat welding part and a second cap (232) for welding a welding part formed in a corner can be detachably connected to the nozzle base (220) (see FIGS. 10, 12 and 14).

[0056] Here, the first cap (231) is formed with a first protrusion (233) so that the side of the opening (237) through which the laser can be irradiated to the outside can protrude further forward (in the direction in which the laser is irradiated), as shown in FIG. 1 and FIG. 8a to FIG. 14b, and a rotary member (236) can be formed on the lower surface of the first protrusion (233) to allow the second safety member (320) constituting the safety means (300) to be described later to be rotatably coupled thereto.

[0057] In addition, the second cap (232) has a shape in which a second protrusion (234) is additionally formed to protrude further forward from the lower surface of the first protrusion (233) formed on the first cap (231) described above, as illustrated.

[0058] At this time, a through-hole for a laser to pass through in order to weld the corner of the parent material may be formed in the second protrusion (234), and it is preferable that an inclined surface having a predetermined inclination angle is formed on the outer surface of the second protrusion (234) depending on the corner position of the parent material.

[0059] Furthermore, a third protrusion (235) may be further formed on the lower surface of at least one of the first protrusion (233) or the second protrusion (234) so ​​as to protrude downward and be inserted into the gap (D) of the adjacent parent materials (O).

[0060] Meanwhile, in the welding torch (1) of the present invention described above, as shown in FIGS. 2a to 5, a circulation path (W / L), a gas movement path (G / L), and a flow path (112a, 112b) can be formed in a holding portion (100) through casting and welding, etc., and an example for forming the circulation path (W / L) and the gas movement path (G / L) will be described below.

[0061] Before the explanation, it is described and illustrated that a circulation path (W / L) is formed using a pipe section (140), but this is only one embodiment, and it should be noted that, if necessary, a gas transfer path (G / L) can also be formed using a pipe section (140) having a hollow portion.

[0062] To this end, as shown, a pipe section forming step is performed to form a pipe section (140) that will become a circulation path (W / L).

[0063] The pipe section forming step can be performed by pre-bending each pipe section (140) in a shape that extends lengthwise and is bent along the outer surface of the laser travel path (L / L), and each pipe section (140) can be manufactured by various methods such as hot working, electric resistance welding (ERW), etc., and then bent.

[0064] At this time, the pipe section (140) is provided in a tube shape with an empty interior, and can be provided with the same material as the laser path (L / L), but considering that casting joining is performed, it is preferable to provide it with a metal material that has a relatively high melting point compared to the laser path (L / L) and also has high conductivity such as heat.

[0065] In addition, it is preferable that the pipe section (140) be made of a metal material that is resistant to corrosion or be subjected to corrosion prevention treatment.

[0066] Furthermore, the pipe section (140) in the present invention may further include a connecting pipe (143) and a connecting pipe (145) formed in a curved shape to improve the circulation efficiency of water for cooling in another embodiment (see FIGS. 15 and 17b).

[0067] That is, as shown, the upper portions of a pair of pipe sections (140) provided adjacent to each other in the body (110) are connected to each other by a connecting pipe (143) having a curved shape so that they can be connected to each other, and if necessary, a connecting pipe (145) can be inserted between the pipe section (140) and the connecting pipe (143) for use.

[0068] Here, the joint pipe (143) is also first subjected to a bending process to have a curved shape before being installed in the grip body (110), and then casting is performed to form the grip body (110) together with a pair of pipe sections (140). The material of the pipe section (140), as well as the joint pipe (143) and the connecting pipe (145), is aluminum.

[0069] Next, casting is performed with the pipe section (140) placed in the mold to form a laser path.

[0070] In this process, a space in which a number of lenses are installed is formed on the inside of the laser path (L / L), and a pipe part (140) is integrally cast and joined to the outside of the laser path (L / L).

[0071] In addition, since a circulation path (W / L) is formed by casting and joining a pipe section (140) in the shape of a tube, there is no need to worry about cooling water leakage and the corrosion prevention process can be reduced.

[0072] Meanwhile, in the step of forming the above-described laser path, the first gripper (111), which is the part held by the user's hand when forming the laser path (L / L), and the second gripper (112) equipped with the laser irradiation unit (200) may be formed so that the insides are connected to each other, or, if necessary, the first gripper (111) and the second gripper (112) may be formed separately, and then the laser paths (L / L) formed inside each may be connected to each other and used (see FIG. 6).

[0073] That is, the forming of the grip part (100) is possible in an integrated manner in which the first gripper (111) and the second gripper (112) are formed as one body and a laser path (L / L) is formed inside them, and in a hybrid manner in which the first gripper (111) and the second gripper (112) are formed separately and then joined in a male-female shape between the protrusion and the joining groove, and then fastened to each other through welding or the like.

[0074] Next, a sealing step is performed to seal the connection by welding a cover plate (141) to the connection surrounding the end of the pipe section (140).

[0075] The connection in the sealing step can be formed in the laser path (L / L) formed in the second holder (112), and can be formed in the form of a partition wall surrounding the end of the pipe section (140) to prevent water, which is a cooling water, from leaking out.

[0076] In addition, a cover plate (141) having a predetermined width is welded to the upper part of the bulkhead forming the connection portion, so that the connection portion is sealed by the cover plate (141) and the cooling water does not leak.

[0077] Meanwhile, as illustrated, the cover plate (120) may be provided in a bent shape corresponding to the shape of the connecting portion and may be welded to the connecting portion, and in addition, may be provided to have a curvature corresponding to the connecting portion.

[0078] In addition, when forming a circulation path (W / L) in the grip section (100), the entire circulation path (W / L) may be formed in the grip section (100) by welding, or the pipe section (140) that will become the circulation path (W / L) may be placed in a mold and casting may be performed to form the entire circulation path (W / L) and the laser movement path (L / L) integrally inside the grip section (100).

[0079] Thus, since the laser travel path (L / L) and the circulation path (W / L) are integrally formed inside the grip section (100) by casting, joining, and welding, unnecessary parts that contribute to weight are reduced, which can help reduce the weight of the welding torch (1).

[0080] Continuing, the grip part (100) of the present invention further includes a grip case (150) mounted on the outer surface of the grip body (110) described above, as shown in FIG. 1, FIG. 7a and FIG. 7b, and the grip case (150) includes a trigger (151) and a micro switch (153).

[0081] The upper part of the trigger (151) is rotatably coupled with the grip case (150) so that when an operator applies external force with a finger or the like, it rotates to control ON / OFF of a micro switch (153) fixedly mounted inside the trigger (151).

[0082] To this end, the micro switch (153) is electrically connected to a control unit (not shown) mounted on a socket (113) that electrically controls the welding torch (1) of the present invention, so that the irradiation of the laser and the movement of cooling water and gas can be determined.

[0083] Of course, the control unit can also control the wire to be exposed to the outside from the wire supply unit (400) depending on the on / off of the micro switch (153).

[0084] Meanwhile, the welding torch (1) in the present invention includes a safety means (300) including a first safety member (310) installed in a phage case (150) and a second safety member (320) installed in a cap (230), as shown in FIGS. 7a to 8b.

[0085] For example, the first safety member (310) includes a lock switch (311) and a pressure switch (313) as a configuration for determining whether to push the trigger (151).

[0086] The lock switch (311) is installed so that it can slide by the elastic force of the elastic body (C / S) inside the trigger (151), and the movement controls the micro switch (153) to be operated by the trigger (151).

[0087] To this end, the worker first pushes the lock switch (311) so that the micro switch (153) can be operated by pressing the trigger (151), thereby securing a space in which the micro switch (153) can be pressed by rotating the trigger (151), and then presses the trigger (151) so that the micro switch (153) can be turned on.

[0088] Here, the pressure switch (313) applies pressure so that the lock switch (311), which has moved by the elastic force of the elastic body (C / S), can be fixed, as shown.

[0089] In addition, the second safety member (320) includes a blocking member (321) and a roller (323) configured to enable the opening and closing of the above-described opening (237) to be performed depending on whether the parent material (O) is welded.

[0090] As shown, the blocking body (321) is rotatably coupled through a rotating member (236) formed in the cap (230), and an elastic body (C / S) in the form of a torsion spring is provided at the coupling portion.

[0091] At this time, it is preferable that a plurality of grooves having an embossing pattern are formed on the inner surface of the blocking body (321) so that the laser irradiated through the opening (237) is reflected on the base material (O) and then diffusely reflected only within the blocking body (321).

[0092] A pair of rollers (323) are connected to the lower portion of the blocking body (321) in a structure that can rotate through bearings (325), and are rotated according to the movement of the welding torch (1) to perform laser welding by coming into contact with the base material (O).

[0093] The second safety member (320) described above operates so that when the welding torch (1) approaches the base material (O) to perform laser welding, the blocking member (321) comes into contact with the outer surface of the base material (O) and rotates upward to open the opening (237) and perform laser welding. After welding is completed, when the blocking member (321) does not come into contact with the base material (O), it rotates downward by the elastic force of the elastic body (C / S) to close the opening (237).

[0094] In this welding process, the laser reflected on the base material (O) is reflected only inside the blocker (321) through a number of grooves (327) formed on the inner surface of the blocker (321), thereby preventing safety accidents for the worker.

[0095] Here, each groove (327) can be formed into a hemispherical groove shape, and, if necessary, a third protrusion (235) can be formed in at least one of the first protrusion (233) and the second protrusion (234) to be inserted into a gap (D) formed between a pair of parent materials (O) to facilitate smooth welding.

[0096] As described above, the welding torch (1) according to the present invention can form the circulation path (W / L), gas movement path (G / L), and flow path (112a, 112b) integrally in the grip portion (100) in a way that is different from the conventional one, so that unnecessary parts that contribute to the weight are reduced, thereby enabling weight reduction.

[0097] In addition, unlike the conventional method, it has the effect of preventing safety accidents to workers by controlling the operation of the trigger (151) through the safety means (300) and blocking the laser reflected on the parent material (O).

Claims

1. In a laser welding torch in which a gripping part (100), a laser irradiation part (200), and a wire supply part (400) are assembled in a gun type and a laser is irradiated toward the base material through a plurality of lenses provided inside to weld, The above gripping part (100) forms a laser movement path (L / L) on the inside, and in addition to the movement path through which water circulates for cooling a number of lenses provided inside the gripping part (100) and the movement path through which gas can be discharged through the laser irradiation part (200), a space for reducing the weight of the welding torch is formed independently of each other, and a gripping body (110) on which a gripping case (150) is mounted on the outside; and A gun-type laser welding torch equipped with a safety means, characterized in that it includes a trigger (151) mounted on the above-mentioned phage case (150) and the laser irradiation unit (200) for determining whether or not to irradiate the laser, as well as a safety means (300) for blocking the diffuse reflection of the laser irradiated to the outside through the laser irradiation unit (200).

2. In paragraph 1, The above laser irradiation unit (200) A connecting body (210) that is connected to one side of the above-mentioned grip body (110), has a hollow portion formed on the outer surface that communicates with a laser path (L / L), and has a gas discharge hole formed that communicates with a gas path (G / L) formed in the second grip body (112); A cylindrical nozzle (220) having a hollow portion formed in the longitudinal direction so that gas discharged through a gas discharge hole moves together with the laser, while communicating with the laser path (L / L); and A cap (230) detachably coupled to the nozzle (220) so that the gas discharged through the nozzle (220) can be concentrated and discharged on the processing surface of the base material; A gun-type laser welding torch equipped with a safety means, characterized in that the above nozzles (220) are fixedly connected to each other by a bushing (221), and a blank space is formed on the outer surface of the bushing (221).

3. In paragraph 2, The cap (230) has an opening (237) formed at the output end for irradiating the laser to the outside and communicating with the laser path (L / L). A gun-type laser welding torch equipped with a safety means, characterized in that either one of a first cap (231) including a first protrusion (233) used when a pair of adjacent base material processing surfaces are flat, or a second cap (232) including a second protrusion (234) formed to protrude in the direction in which a laser is emitted from the first protrusion (233) used when a pair of adjacent base material processing surfaces are bent corners can be selectively replaced and used.

4. In paragraph 3, On the lower surface of the first protrusion (233) or the second protrusion (234) A gun-type laser welding torch equipped with a safety means, characterized in that a third protrusion (235) is further formed to be inserted into the gap between a pair of adjacent parent materials.

5. In paragraph 1, The above safety means (300) A first safety member (310) manually controlled to prevent the micro switch (153) from operating by pressing a trigger (151) rotatably mounted on the above-mentioned phage case (150); and A gun-type laser welding torch equipped with a safety means, characterized by including a rotary member (236) formed on the outer surface of the laser irradiation unit (200) and a second safety member (320) that is rotatably mounted and blocks laser light scattered through the base material.

6. In paragraph 5, The above first safety member (310) A lock switch (311) that slides by the elastic force of an elastic body (C / S) inside the trigger (151); and A gun-type laser welding torch equipped with a safety means, characterized in that it includes a pressure switch (313) mounted on the grip case (150) that pressurizes the lock switch (311) with the elastic force of an elastic body (C / S) when the lock switch (311) moves to prevent the trigger (151) from rotating.

7. In paragraph 5, The above second safety member (320) A blocker (321) rotatably coupled to the rotary member (236); and A roller (323) having a bearing (325) that is rotatably coupled to a pair of rotating pieces (236) facing each other; A gun-type laser welding torch equipped with a safety means, characterized in that the rotation of the above blocking body (321) is rotated up and down so that the opening (237) of the laser irradiation part (200) through which the laser is irradiated can be opened and closed depending on whether or not it comes into contact with the base material.

8. In paragraph 7, A gun-type laser welding torch equipped with a safety means, characterized in that the inner surface of the above-mentioned blocking body (321) is formed with an embossing pattern, and a plurality of grooves (327) are formed so that the laser reflected through the base material is reflected at least once inside the blocking body (321), and the grooves (327) are formed in a hemispherical shape.

9. In paragraph 1, The above-mentioned phage body (110) It includes a circulation path (W / L) through which water circulates for cooling the lens, and a gas path (G / L) through which gas can be discharged through the laser irradiation unit (200). A gun-type laser welding torch equipped with a safety means, characterized in that at least one of the circulation path (W / L) and the gas transfer path (G / L) is formed through a pipe section (140) each having a pipe (PIPE) shape.

10. In paragraph 9, Circular path (W / L) A connecting pipe (143) that connects a pair of the above pipe sections (140) so that they can circulate with each other; and A connecting pipe (145) connected between the above connecting pipe (143) and the pipe part (140); including, A gun-type laser welding torch equipped with a safety means, characterized in that the pipe section (140) and the connecting pipe (143) are installed through casting of the grip body (110) after bending processing before being mounted on the grip body (110).

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