A new integrated handheld laser welding gun

Abstract

The application relates to a novel integrated handheld laser welding gun, which comprises a gun body with an optical path channel inside and a gun head arranged on the front end face of the gun body; the gun body comprises a handheld part with a collimating mirror group and a gun body part with a focusing mirror group; the handheld part is provided with a gas conveying channel penetrating through the front end face of the gun body; the front end face of the gun body part is provided with a connecting groove connecting the gas conveying channel and the optical path channel in the gun body part; the upper part of the connecting groove is provided with a cylindrical flow guide arranged coaxially in the optical path channel; the outer side wall of the cylindrical flow guide is provided with a flow guide part guiding the airflow to the direction of the focusing mirror group; when assembled, the cylindrical flow guide is provided with air gaps between the focusing mirror group and the inner wall of the optical path in the gun body part; the gas blowing structure is simple, and the overall structure of the welding gun is compact.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of laser welding, in particular to a novel integrated handheld laser welding gun. BACKGROUND

[0002] The laser welding technology has been more and more widely applied due to its high efficiency and superior performance, and the handheld laser welding gun has also been more and more accepted by users. During the laser welding process by using the welding gun, a large amount of smoke and plasma will be generated. Since the smoke and plasma have the effects of absorption, refraction and scattering on the incident laser, the smoke and plasma weaken the energy of the laser projected onto the workpiece surface, and even expand the laser beam spot, so that the welding quality and efficiency of the workpiece will be reduced. In order to avoid the weakening of the energy of the laser projected onto the workpiece surface by the smoke and plasma, the inert protective gas is generally blown towards the welding position to protect the laser beam. At present, the blowing structure of the existing welding gun is located outside the gun body, which leads to a large overall volume of the welding gun and an uncompact structure. SUMMARY

[0003] The present application aims at the deficiencies of the prior art, and provides a novel integrated handheld laser welding gun, which can well solve the above problems.

[0004] To achieve the above requirements, the technical scheme adopted by the present application to solve the technical problems is as follows:

[0005] The present application provides a novel integrated handheld laser welding gun, which comprises a gun body, a light path channel for laser passing through is arranged in the gun body, and a gun head is arranged on the front end face of the gun body; the gun body comprises a handheld part for mounting a collimating mirror group and a gun body part for mounting a focusing mirror group; a gas conveying channel is arranged in the handheld part along the length direction thereof, the upper end of the gas conveying channel penetrates through the front end face of the gun body, a communication groove is arranged on the front end face of the gun body part and communicates the gas conveying channel and the light path channel in the gun body part, the communication groove is located in front of the focusing mirror group, a cylindrical flow guide member is coaxially arranged in the light path channel above the communication groove, a flow guiding part for guiding the gas flow towards the focusing mirror group is arranged on the outer side wall of the cylindrical flow guide member, and a gas gap is arranged between the cylindrical flow guide member and the inner wall of the focusing mirror group and the light path passing through the gun body part when the cylindrical flow guide member is assembled in place.

[0006] The novel integrated handheld laser welding gun, wherein the outer side wall of the cylindrical flow guide is provided with an annular boss in the circumferential direction, the annular boss forms the flow guide part, the inner wall of the light path channel in the gun body part is provided with a positioning groove matched with the annular boss, and the axial length of the positioning groove is greater than the axial thickness of the annular boss.

[0007] The novel integrated handheld laser welding gun, wherein the side of the positioning groove, away from the focusing mirror group, is provided with a first sealing element, the front end face of the gun head part is provided with a sealing groove around the communication groove, the two ends of the sealing groove are communicated with the positioning groove, the sealing groove is provided with a second sealing element, and the first sealing element and the second sealing element form an integrated sealing ring.

[0008] The novel integrated handheld laser welding gun, wherein the front end face of the gun body part is provided with an insulating plate, the front and rear side walls of the insulating plate are tightly attached to the gun head part and the gun body part respectively when assembled in place, and the sealing ring is tightly attached to the insulating plate.

[0009] The novel integrated handheld laser welding gun, wherein the left and right side walls of the gun body part are both provided with grooves, the grooves are provided with control boards, the front side wall of the groove is provided with a first channel penetrating the front end face of the gun body part, the inner wall of the first channel is provided with a branch channel communicated with the communication groove, the insulating plate is provided with a second channel communicated with the first channel, the gun head part is provided with a third channel communicated with the second channel, and the outlet of the third channel is located on the side wall of the gun head part.

[0010] The novel integrated handheld laser welding gun, wherein the end of the gun body part, away from the gun head part, is provided with a mounting window communicated with the light path channel inside the gun body part, the window is provided with a reflector mirror for reflecting the laser in the handheld part into the reflector mirror in the gun body part, the gun body part is further provided with a yaw motor for adjusting the yaw of the reflector mirror, and a protective cover for covering the yaw motor and the reflector mirror on the gun body part.

[0011] The novel integrated handheld laser welding gun, wherein the handheld part is provided with a water inlet channel and a water outlet channel along the length direction thereof, and the upper ends of the water inlet channel and the water outlet channel are communicated with each other; the air conveying channel, the water inlet channel and the water outlet channel are all located on the front side of the light path channel in the handheld part.

[0012] The novel integrated handheld laser welding gun, wherein the lower ends of the water inlet channel, the water outlet channel and the air conveying channel penetrate the lower end face of the handheld part.

[0013] The novel integrated handheld laser welding gun, wherein the welding gun further comprises a protective sleeve wrapped outside the gun body.

[0014] The novel integrated handheld laser welding gun, wherein the protective sleeve comprises a left half shell and a right half shell, and the left half shell and the right half shell are detachably connected.

[0015] The present application has the beneficial effect that through the cooperation of the air channel and the cylindrical flow guide, the airflow can be blown back to the focusing lens group, further blown back from the head of the welding gun, and better protection is provided for the focusing lens group. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the present application will be further described below with reference to the drawings and embodiments. The drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings:

[0017] Figure 1 is the overall structure of the novel integrated handheld laser welding gun of the present application.

[0018] Figure 2 is an exploded view of Figure 1 .

[0019] Figure 3 is a partial structure view of Figure 2 .

[0020] Figure 4 is a partial structure front view of Figure 1 .

[0021] Figure 5 is a partial structure sectional view of Figure 1 .

[0022] Figure 6 is a partial structure enlarged view of Figure 5 .

[0023] Figure 7 is an enlarged view of Figure 6 .

[0024] Figure 8 is a partial structure bottom view of Figure 1 .

[0025] Figure 9It is the internal water inlet channel and water outlet channel sectional view of the novel integrated handheld laser welding gun. DETAILED DESCRIPTION

[0026] The terms "first", "second", "third", and "fourth" and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of use in either order. Furthermore, the term "comprising" or "containing" as used in the specification includes an open-ended "including but not limited to" to permit the inclusion of additional steps, elements, components, or the like. It will also be understood that the terms "comprising" and "including" when used in this specification, specify the presence of stated features, integers, steps, processes, actions, or the like but do not preclude the presence or addition of one or more other features, integers, steps, processes, actions, or groups thereof.

[0027] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. It is expressly understood that that the embodiments described herein are merely possible embodiments of the application and are not a limitation of the scope of the application. It is expressly intended that the claims are written in a suitable language and encompass all features of the application within the spirit and scope of the claims. It is to be understood that the phraseology and terminology employed herein are for the purpose of description and not of limitation. Any use of being preceded by "comprising" or "containing" or "having" or "including" or "carrying" or "containing" or "devoid of" or "free of" or "having" or "including" or "with" or "without" or the like is not intended to exclude the presence of other elements or additional steps. Furthermore, the words "a" and "an" are defined as meaning one or more unless explicitly stated otherwise.

[0028] "Multiple" refers to two or more. "And / or", describes the relationship between the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B exist at the same time, and B alone. The character " / " generally represents that the front and rear associated objects are a "or" relationship.

[0029] Moreover, the terms "upper", "lower", "left", "right", "upper end", "lower end", "vertical", and the like indicating the orientation are based on the attitude position of the device or equipment described in the scheme in normal use.

[0030] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below. Obviously, the described embodiments are part of the embodiments of the present application, not all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0031] The novel integrated handheld laser welding gun of the preferred embodiment of the present application is as follows Figures 1-9As shown, the welding gun comprises a gun body 1, a light path channel 100 is arranged in the gun body 1 for laser to pass through, and the welding gun further comprises a gun head 2 arranged on the front end face of the gun body 1; specifically, the gun body 1 comprises a hand-held part 101 for mounting a collimating mirror group 200, and a gun body part 102 for mounting a focusing mirror group 300; the upper end of the hand-held part 101 is arranged obliquely and integrally connected with the horizontal gun body part 102, the light path channel 100 extends from the lower end face of the hand-held part 101 towards the gun body part 102 and penetrates to the front end face of the gun body part 102, the collimating mirror group 200 is arranged in the hand-held part 101, and the focusing mirror group 300 is arranged in the gun head 2 and is detachably connected with the gun body 1 in a drawer connection manner; further, the hand-held part 101 is provided with a gas conveying channel 3 along the length direction thereof, the upper end of the gas conveying channel 3 penetrates to the front end face of the gun body 1, a communication groove 4 is arranged on the front end face of the gun body part 102 and communicates the gas conveying channel 3 and the light path channel 100 in the gun body part 102, the communication groove 4 is located on the front side of the focusing mirror group 300, a cylindrical flow guide member 5 is coaxially arranged in the light path channel 100 above the communication groove 4, the inner cavity of the cylindrical flow guide member 5 also forms a light path channel 100 for laser to pass through, a flow guiding part 51 is arranged on the outer side wall of the cylindrical flow guide member 5 for guiding the gas flow from the communication groove 4 towards the focusing mirror group 300, and when assembled in place, the cylindrical flow guide member 5 is provided with a gas gap 6 between the focusing mirror group 300 and the inner wall of the light path through the gun body part 102; during operation, high-pressure gas flow enters the gas conveying channel 3 and further enters the communication groove 4, and then reversely moves upwards along the gas gap 61 between the outer side wall of the cylindrical flow guide member 5 and the light path channel 100, when passing through the gas gap 61, the gas flow is coaxially and uniformly diffused to the outer side wall of the cylindrical flow guide member 5, and then coaxially enters the gas gap 62 between the cylindrical flow guide member 5 and the focusing mirror group 300 and blows towards the center of the light path channel 100 along the front side wall of the focusing mirror group 300, and further changes direction by rebounding through the focusing mirror group 300 to enter the inside of the cylindrical flow guide member 5 and is blown out from the gun head 2 coaxially with the laser beam, not only can the gas flow be reversely blown towards the focusing mirror group 300 and then reversely blown out from the gun head 2 to provide better protection for the focusing mirror group 300, but also the gas flow can be coaxially surrounded around the periphery of the laser beam and shot out from the welding gun through the cylindrical flow guide member 5, which can effectively improve the oxidation resistance performance of the laser welding spot, isolate the oxygen around the welding spot, and further ensure the welding quality to be more stable; in addition, the gas conveying channel 3 is arranged inside the welding gun, so that the overall structure is more compact, compared with the traditional additional gas blowing structure arranged outside the welding gun, the appearance is more simple and compact, and the welding gun is not bound by the additional structure outside, which is more convenient to use, and the overall weight of the welding gun can be further reduced, which is a multiple effect.

[0032] Preferably, the outer side wall of the cylindrical flow guide 5 is circumferentially provided with an annular boss, which is located directly above the communication groove 4, and the annular boss forms a flow guide part 51. Further, the inner wall of the light path channel 100 in the barrel part 102 is provided with a positioning groove 7 matched with the annular boss. The axial length of the positioning groove 7 is greater than the axial thickness of the annular boss, thereby facilitating adjustment of the axial position of the cylindrical flow guide 5, and further facilitating adjustment of the width of the air gap between the cylindrical flow guide 5 and the focusing lens group 300, thereby adjusting the flow rate of the airflow converging at the center of the light path channel 100, and avoiding the intersection point of the airflow blown into the light path channel 100 in a cylindrical shape from being offset upward.

[0033] Preferably, the positioning groove 7 is provided with a first sealing member a1 on the side of the annular boss away from the focusing lens group 300. The front end face of the barrel head part 2 is provided with a sealing groove 8 around the communication groove 4, and the two ends of the sealing groove 8 are in communication with the positioning groove 7. The sealing groove 8 is provided with a second sealing member a2. The first sealing member a1 and the second sealing member a2 form a sealing ring 9. The sealing ring 9 not only seals the connection between the barrel head part 2 and the barrel part 102, but also positions the cylindrical flow guide part 51. When the position of the cylindrical flow guide 5 needs to be adjusted, the corresponding sealing ring 9 with the appropriate thickness can be replaced to achieve the dual functions of sealing and positioning.

[0034] Preferably, the front end face of the barrel part 102 is provided with an insulating plate 10. When assembled, the front and rear side walls of the insulating plate 10 are tightly attached to the barrel head part 2 and the barrel part 102, respectively. The sealing ring 9 is tightly attached to the insulating plate 10. The insulating plate 10 can effectively prevent static electricity generated during welding of the barrel head part 2 from being transmitted to the barrel part 102, thereby preventing electric shock.

[0035] Preferably, the left and right side walls of the barrel part 102 are provided with grooves 11, and control boards 12 are arranged in the grooves 11. The control boards 12 can reduce environmental interference on signals and ensure the accuracy of control. The front side wall of the groove 11 is provided with a first channel 13 penetrating the front end surface of the barrel part 102. The inner wall of the first channel 13 is provided with a branch channel (not shown) in communication with the communication groove 4. Specifically, the diameter of the branch channel is much smaller than the diameter of the first channel 13. The insulating plate 10 is provided with a second channel 25 in communication with the first channel 13. The gun head part 2 is provided with a third channel 14 in communication with the second channel 25. The outlet of the third channel 14 is located on the side wall of the gun head part 2. In actual use, a large amount of static electricity will accumulate on the gun head part 2. In order to prevent electric shock accidents, the gun head part 2 is connected to a special static electricity elimination device in the backstage system through a wire. The first channel 13 and the third channel 14 can hide the wire and realize internal wiring, preventing the wire from being exposed to surrounding objects and falling off due to scratching. Further, the second channel can also guide part of the airflow into the groove 11 and the third channel 14, so as to continuously cool the control board 12 and the side wall of the barrel part 102.

[0036] Preferably, the end of the barrel part 102 away from the gun head part 2 is provided with a mounting window 15 in communication with the optical path channel 100 inside the barrel part 102. The mounting window 15 is provided with a reflector 16 for reflecting laser light located in the handheld part 101 into the barrel part 102. The barrel part 102 is also provided with a yaw motor 17 for adjusting the yaw of the reflector 16, and a protective cover 18 for covering the yaw motor 17 and the reflector 16 on the barrel part 102. Through the cooperation of the yaw motor 17 and the reflector 16, the welding of the welding surface type light spot can be realized, and the welding efficiency can be further improved.

[0037] Preferably, the handheld part 101 is provided with a water inlet channel 19 and a water outlet channel 20 along the length direction thereof. The upper ends of the water inlet channel 19 and the water outlet channel 20 are located at the upper end of the handheld part 101 and are in communication with each other. The air channel 3, the water inlet channel 19 and the water outlet channel 20 are located on the front side of the optical path channel 100 in the handheld part 101, so as to provide more space for the installation of the drawer type collimator lens group 200 on the handheld part 101. The water inlet channel 19 and the water outlet channel 20 can effectively take away the heat on the handheld part 101, preventing the local temperature from being too high to cause burns. In addition, the integrated connection structure of the handheld part 101 and the barrel part 102 can further transfer the heat on the barrel part 102 to the handheld part 101 in time, and the cooling water in the water inlet channel 19 and the water outlet channel 20 can take away the heat.

[0038] Preferably, the lower ends of the water inlet channel 19, the water outlet channel 20 and the air channel 3 penetrate the lower end surface of the handheld part 101, facilitating the connection of a water pipe 26 and an air pipe 27 for wiring connection.

[0039] Preferably, the welding gun further comprises a protective cover 21 covering the outside of the gun body 1, so as to protect the components on the welding gun and further provide heat protection for the operator. In addition, a display 22 is arranged on the protective cover 18 for the operator to view the real-time welding parameters, and a connecting cover 23 is arranged to seal the display 22 and the protective cover, and an observation window 24 is arranged on the connecting cover 23 corresponding to the display.

[0040] Preferably, the protective cover 21 comprises a left half shell 211 and a right half shell 212 which are detachably connected to facilitate installation and disassembly.

[0041] It should be understood that those skilled in the art can make improvements or changes according to the above description, and all these improvements and changes shall belong to the protection scope of the appended claims of the present application.

Claims

1. A new type of integrated handheld laser welding gun, comprising a gun body, a light path channel for laser passing is arranged in the gun body, characterized in that, The welding gun further comprises a gun head part arranged on the front end surface of the gun body; the gun body comprises a hand holding part on which a collimating lens group is arranged, and a gun body part on which a focusing lens group is arranged; a gas conveying channel is arranged in the hand holding part along the length direction of the hand holding part, and the upper end of the gas conveying channel penetrates the front end surface of the gun body; a communication groove is arranged on the front end surface of the gun body part, and the communication groove is in communication with the gas conveying channel and a light path channel in the gun body part; the communication groove is located in front of the focusing lens group; a cylindrical flow guide part is coaxially arranged in the light path channel above the communication groove; a flow guide part is arranged on the outer side wall of the cylindrical flow guide part to guide the gas flow to the focusing lens group; when assembled, a gas gap is formed between the cylindrical flow guide part and the inner wall of the focusing lens group and the light path in the gun body part. An annular boss is circumferentially arranged on the outer side wall of the cylindrical flow guide part, and the annular boss forms the flow guide part; a positioning groove is arranged on the inner wall of the light path channel in the gun body part, and the positioning groove is adapted to the annular boss; the axial length of the positioning groove is greater than the axial thickness of the annular boss. A first sealing part is arranged in the positioning groove on the side of the annular boss away from the focusing lens group; a sealing groove is arranged on the front end surface of the gun head part around the communication groove; the two ends of the sealing groove are in communication with the positioning groove; a second sealing part is arranged in the sealing groove; the first sealing part and the second sealing part form an integrated sealing ring. An insulating plate is arranged on the front end surface of the gun body part; when assembled, the front and back side walls of the insulating plate are tightly attached to the gun head part and the gun body part respectively, and the sealing ring is tightly attached to the insulating plate.

2. The new integrated handheld laser welding gun as claimed in claim 1, wherein, A recess is arranged on the left and right side walls of the gun body part; a control plate is arranged in the recess; a first channel is arranged on the front side wall of the recess and penetrates the front end surface of the gun body part; a branch channel is arranged on the inner wall of the first channel and is in communication with the communication groove; a second channel is arranged on the insulating plate and is in communication with the first channel; a third channel is arranged on the gun head part and is in communication with the second channel; the outlet of the third channel is located on the side wall of the gun head part.

3. The new and improved one-piece hand-held laser welding gun of claim 1, wherein, An installation window is arranged on the end of the gun body part away from the gun head part, and the installation window is in communication with the light path channel in the gun body part; a reflecting mirror is arranged in the window to reflect the laser light in the hand holding part into the gun body part; a yawing motor is arranged on the gun body part to adjust the yawing of the reflecting mirror; a protective cover is arranged on the gun body part to cover the reflecting mirror and the yawing motor.

4. The new and improved one-piece hand-held laser welding gun of claim 1, wherein, A water inlet channel and a water outlet channel are arranged in the hand holding part along the length direction of the hand holding part; the upper ends of the water inlet channel and the water outlet channel are in communication with each other; the gas conveying channel, the water inlet channel and the water outlet channel are located in front of the light path channel in the hand holding part.

5. The new and improved one-piece hand-held laser welding gun of claim 4, wherein, The lower ends of the water inlet channel, the water outlet channel and the gas conveying channel penetrate the lower end surface of the hand holding part.

6. The new integrated handheld laser welding gun according to any one of claims 1-4, characterized in that, The welding gun further comprises a protective cover wrapped around the outside of the gun body.

7. The new and improved one-piece hand-held laser welding gun according to claim 6, characterized in that The protective cover comprises a left half shell and a right half shell; the left half shell and the right half shell are detachably connected.

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