A laser welding torch

Abstract

The application relates to a laser welding gun, which comprises a welding gun body, a galvanometer motor and a reflecting mirror installed on the galvanometer motor, a motor fixing seat and a hoop element are arranged between the welding gun body and the galvanometer motor, and the galvanometer motor is connected to the welding gun body through the hoop element and the motor fixing seat. Through the motor fixing seat, the galvanometer motor can be reliably fixed, the form that the motor fixing seat is connected to the welding gun body can facilitate the adjustment of the installation position of the galvanometer motor through the motor fixing seat. In combination with the hoop element, the inclination angle of the galvanometer motor and the reflecting mirror connected to the galvanometer motor can be adjusted, and the installation requirement of the reflecting mirror at zero position is met.

Description

Technical Field

[0001] The present application relates to the technical field of laser welding, and in particular to a laser welding gun. Background Art

[0002] In the field of laser welding, laser welding guns, as handheld laser welding equipment with simple structure and easy operation, are receiving more and more attention.

[0003] Laser welding guns generally perform welding by emitting laser light, which includes a galvanometer motor and a reflector connected to the galvanometer motor. By inputting a position signal to the galvanometer motor, the galvanometer motor will swing a certain angle according to a certain voltage and angle conversion ratio, thereby driving the reflector to change the route of the laser light and emit the laser light.

[0004] During initial installation, the center line of the reflector should be aligned with the zero-position center line of the laser beam, and the reflector should be at a relatively ideal tilt angle. A common angle between the reflector plane and the horizontal plane is 120°, which can ensure reliable reflection of the laser beam.

[0005] The galvanometer motor inside an existing laser welding gun is usually fixed with a top screw, and the tilt angle of the reflector is controlled by adjusting the different screwing depths of the top screw inside the laser welding gun.

[0006] However, the screw tends to loosen over time, compromising laser routing accuracy and, worse still, potentially damaging the welding torch by directly striking the internal structure of the laser beam. Using the screw to adjust the reflector's tilt angle is difficult, and the loose screw can compromise the stability of the galvanometer motor. Summary of the Invention

[0007] The purpose of the present application is to provide a laser welding gun, which can ensure the stability of the installation of the galvanometer motor and facilitate the adjustment of the angle of the galvanometer motor, thereby facilitating the setting of the tilt angle of the reflector when it is at zero position.

[0008] In order to achieve the above-mentioned objectives, the present invention provides a laser welding gun, comprising a welding gun body, a galvanometer motor, and a reflector mounted on the galvanometer motor, wherein a motor fixing seat and a hoop are provided between the welding gun body and the galvanometer motor, and the galvanometer motor is connected to the welding gun body through the hoop and the motor fixing seat.

[0009] The motor fixing base can reliably fix the galvanometer motor, the motor fixing base is connected to the welding gun body, and the installation position of the galvanometer motor can be adjusted through the motor fixing base. In combination with the hoop, the inclination angle of the galvanometer motor and the reflecting mirror connected to the galvanometer motor can be adjusted, and the installation requirement of the reflecting mirror at zero position is met.

[0010] In an optional embodiment, the motor fixing base connection part on the welding gun body is a cylindrical structure, and the galvanometer motor connection part on the motor fixing base is provided with a cylindrical structure.

[0011] The cylindrical structures arranged on the welding gun body and the motor fixing base can connect the motor fixing base between the welding gun body and the galvanometer motor, and facilitate the adjustment of the laser reflection angle of the reflecting mirror driven by the galvanometer motor.

[0012] In an optional embodiment, the axes of the cylindrical structures arranged on the welding gun body and the motor fixing base are horizontally arranged and are perpendicular to the axis of the galvanometer motor.

[0013] The horizontally arranged cylindrical structure axes on the welding gun body and the motor fixing base can horizontally install the galvanometer motor, and the horizontally arranged cylindrical structure axes are perpendicular to the axis of the galvanometer motor, so that the central axis of the galvanometer motor can always intersect with the axes of the two cylindrical structures during the adjustment of the galvanometer motor, and the laser reflection point is located at the center of the reflecting mirror.

[0014] In an optional embodiment, the cylindrical structure arranged on the welding gun body is an outward convex cylindrical structure, and the motor fixing base is provided with a corresponding inward concave cylindrical structure.

[0015] The outward convex cylindrical structure arranged on the welding gun body and the inward concave cylindrical structure corresponding to the outward convex cylindrical structure arranged on the motor fixing base can match and connect the motor fixing base to the welding gun body, and enhance the stability of the connection.

[0016] In an optional embodiment, the axes of the outward convex cylindrical structure and the inward concave cylindrical structure are located at the center of the reflecting mirror.

[0017] The axes of the two cylindrical structures are located at the center of the reflecting mirror, so that the welding gun body, the motor fixing base and the galvanometer motor can be concentrically installed, and the accuracy of laser reflection is improved.

[0018] In an optional embodiment, the motor fixing base connection part on the welding gun body is a spherical structure, and the galvanometer motor connection part on the motor fixing base is provided with a spherical structure.

[0019] Through the cooperative connection between the welding gun body and the spherical structure of the motor fixing seat, the motor fixing seat and the galvanometer motor can be further facilitated to rotate at full angles in the three-dimensional circumferential direction, thereby increasing the range of adjusting the reflector angle through the galvanometer motor.

[0020] In an optional embodiment, an elongated hole is provided on the motor fixing seat, and the motor fixing seat is fixed to the welding gun body by means of screws passing through the elongated hole.

[0021] The long hole provided on the motor fixing base can facilitate the motor fixing base to drive the galvanometer motor to adjust its position on the welding gun body, ensuring the concentric installation of the welding gun body, the motor fixing base and the galvanometer motor.

[0022] In an optional embodiment, the elongated holes are a plurality of symmetrically arranged elongated holes, and the long sides of the elongated holes are arranged vertically.

[0023] By arranging the long side of the long hole vertically, the installation position of the motor fixing seat can be adjusted in the up and down directions. Combined with the hoop, the galvanometer motor can be adjusted in two dimensions: up and down position and rotation angle.

[0024] In an optional embodiment, the motor fixing seat and the hoop are an integral structure.

[0025] The hoop is connected to the motor fixing seat, and the two are an integrated structure, which can enable the galvanometer motor to rotate under the action of the hoop. At the same time, after the hoop fixes the galvanometer motor, it is connected to the welding gun body as a whole through the motor fixing seat, which effectively improves the stability of the galvanometer motor installation.

[0026] In an optional embodiment, the hoop is C-shaped.

[0027] The C-shaped hoop can better fit the galvanometer motor, making it easier for the galvanometer motor to rotate inside the C-shaped hoop, thereby achieving the purpose of adjusting the installation angle of the galvanometer motor.

[0028] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0030] Figure 1The position schematic diagram of the galvanometer motor provided in the present application on the welding gun body is provided;

[0031] Figure 2 The installation structure schematic diagram of the motor fixing seat and the clamping member provided in the present application is provided;

[0032] Figure 3 The cross-sectional structure schematic diagram of the laser welding gun provided in the present application is provided;

[0033] Figure 4 The external shape structure schematic diagram of the laser welding gun provided in the present application is provided.

[0034] Icon:

[0035] 1-welding gun body; 11-rear seat; 12-rear cover;

[0036] 2-galvanometer motor;

[0037] 3-reflector;

[0038] 4-motor fixing seat;

[0039] 5-clamping member; 51-fixing block; 52-moving block; 53-cutting groove;

[0040] 6-screw. DETAILED DESCRIPTION

[0041] 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 in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, not all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0042] In the description of the present application, it should be noted that the directions or position relationships indicated by the terms “inner”, “outer” and the like are based on the directions or position relationships shown in the drawings, or the directions or position relationships commonly placed when the products of the present application are used, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements must have a particular direction, be constructed and operated in a particular direction, and therefore cannot be understood as limiting the present application. In addition, the terms “first”, “second” and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0043] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed" and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0044] See also Figures 1-3 The present invention provides a laser welding gun, comprising a welding gun body 1, a galvanometer motor 2, and a reflector 3 mounted on the galvanometer motor 2. A motor fixing seat 4 and a hoop 5 are provided between the welding gun body 1 and the galvanometer motor 2. The galvanometer motor 2 is connected to the welding gun body 1 through the hoop 5 and the motor fixing seat 4.

[0045] The laser welding gun in the present invention is mainly used for laser welding. Specifically, the installation of the galvanometer motor 2 is adjusted to control the tilt angle of the reflector 3 connected to the galvanometer motor 2, so as to achieve controllable routing of the laser light.

[0046] In existing installation methods, the galvanometer motor 2 is typically secured to the laser welding gun by installing a set screw on the welding gun housing. The installation angle of the galvanometer motor 2, and thus the tilt angle of the reflector 3 connected to the galvanometer motor 2, is adjusted by varying the length of the set screw inserted into the welding gun. This set screw fixation and angle adjustment do not effectively secure the galvanometer motor 2. After prolonged use, loosening of the set screw can make it difficult to ensure the reliable operation of the reflector 3.

[0047] By providing a motor fixing base 4 on the galvanometer motor 2, combined with a hoop 5 connected to the motor fixing base 4 for fixing the galvanometer motor 2, the galvanometer motor 2 can be effectively fixedly installed on the welding gun body 1. The hoop 5 facilitates the adjustment of the installation angle of the galvanometer motor 2 in the zero position state. When the hoop 5 is in a loose state, the galvanometer motor 2 can be rotated around its axis, thereby achieving simultaneous adjustment of the galvanometer motor 2 and the reflector 3, so that the tilt angle of the reflector 3 meets the operating requirements and the reflected laser is adjusted in the horizontal direction. After the adjustment is completed, the hoop 5 is locked by the connecting piece so that the hoop 5 fixes the galvanometer motor 2, and then the motor fixing base 4 is connected to the welding gun body 1 to complete the adjustment and fixation of the galvanometer motor 2 on the welding gun body 1.

[0048] The portion of the welding gun body 1 that connects to the motor mount 4 is a cylindrical structure, and the portion of the motor mount 4 that connects to the galvanometer motor 2 is also provided with a cylindrical structure. The cylindrical structures provided on the welding gun body 1 and the motor mount 4, respectively, enable the motor mount 4 to be installed between the welding gun body 1 and the galvanometer motor 2, and facilitate the galvanometer motor 2 to drive the reflector 3 to adjust the laser reflection angle.

[0049] The cylindrical axis arranged on the welding gun body 1 and the motor mounting base 4 is arranged horizontally. The horizontal arrangement of the cylindrical axis can limit the adjustment direction of the laser, so that the galvanometer motor is adjusted along the cylinder, and the reflected laser is adjusted in the vertical direction. In addition, the cylindrical axis on the welding gun body 1 and the motor mounting base 4 are perpendicular to the axis of the galvanometer motor 2. Specifically, the axes of the two cylinders on the welding gun body 1 and the motor mounting base 4 can form the center plane of the welding gun body 1, and the plane in which the axis of the galvanometer motor 2 is located is perpendicular to the center plane formed by the two cylindrical axes. Through this arrangement, when the galvanometer motor 2 is adjusted, it is ensured that the central axis of the galvanometer motor 2 can always intersect with the axes of the two cylinders, ensuring that the laser reflection point is located at the center of the reflector 3.

[0050] The cylindrical surface provided on the welding gun body 1 is an outwardly convex cylindrical surface, and the motor mount 4 is provided with a corresponding inwardly concave cylindrical surface. By providing the outwardly convex cylindrical surface on the welding gun body 1 and the inwardly concave cylindrical surface provided on the motor mount 4 to match the outwardly convex cylindrical surface, the motor mount 4 can be matched and connected to the welding gun body 1, thereby enhancing the stability of the connection.

[0051] Because the central axis of the galvanometer motor 2 always intersects the axes of the two cylinders, the axes of the outer convex cylinder and the inner concave cylinder are both located at the center of the reflector 3. This enables concentric installation of the welding gun body 1, the motor mount 4, and the galvanometer motor 2, improving the accuracy of adjusting the laser reflection direction, ensuring that the reflected laser can only be adjusted in the vertical direction, minimizing the impact in the horizontal direction.

[0052] Specifically, the welding gun body 1 includes a rear seat 11 at the rear end, and the galvanometer motor 2 is mounted on the rear seat 11. The rear end of the welding gun is free of other components, providing ample mounting space and facilitating connection to the galvanometer motor 2. In this embodiment, the galvanometer motor 2 partially extends into the interior of the rear seat 11, while the remaining portion is exposed outside the rear seat 11. The motor is connected to the rear seat 11 via a motor mounting base 4, facilitating adjustment of the position of the galvanometer motor 2 within the rear seat 11, allowing the reflector 3 connected to the protruding end of the galvanometer motor 2 to receive laser light and reliably and stably reflect the laser light.

[0053] The mounting base of the reflector 3 is connected to the protruding end of the galvanometer motor 2. An opening slot is provided on the mounting base. The reflector 3 is specifically clamped on the opening slot. The mounting base is obliquely connected to the protruding end. The plane of the reflector 3 is perpendicular to the tilt direction of the mounting base.

[0054] The motor mount 4 is connected to the welding gun body 1 via fasteners, specifically screws 6 disposed between the rear seat 11 and the motor mount 4. Compared to a jackscrew, screws 6 provide a more stable and reliable fastening method, preventing loosening after prolonged use. Multiple screws 6 are spaced around the circumference of the motor mount 4, ensuring even distribution of the fastening force between the rear seat 11 and the motor mount 4, preventing misalignment and ensuring a stable and reliable connection between the motor mount 4 and the polarization motor, including the polarization motor, to the welding gun rear seat 11.

[0055] In this embodiment, the motor mount 4 is provided with an elongated hole, which is secured to the welding gun body 1 via screws 6 inserted through the elongated hole. The elongated hole in the motor mount 4 further limits the adjustment direction and range of the galvanometer motor, making it easier for the motor mount 4 to adjust the position of the galvanometer motor 2 on the welding gun body 1, thereby ensuring concentric installation of the welding gun body 1, the motor mount 4, and the galvanometer motor 2.

[0056] The elongated holes are symmetrically arranged, with their long sides arranged vertically. By arranging the long sides of the elongated holes vertically, the motor mounting base 4 can be adjusted in the vertical direction of the rear seat 11. Combined with the hoop 5, the galvanometer motor 2 can be adjusted in two dimensions: vertical position and rotation angle.

[0057] The galvanometer motor 2 extends into the interior of the welding gun rear seat 11, and a mounting hole for mounting the galvanometer motor 2 is provided on the welding gun rear seat 11. Preferably, the mounting hole and the body of the galvanometer motor 2 are in a clearance fit relationship, which enables the position of the galvanometer motor 2 on the welding gun rear seat 11 to be fine-tuned, further enhancing the adjustability of the galvanometer motor 2 and the reflector 3.

[0058] The galvanometer motor 2 passes through the mounting hole and extends into the interior of the welding gun rear seat 11. The reflector 3 is specifically connected to the extending end of the galvanometer motor 2. By adjusting the position of the galvanometer motor 2, the installation position of the reflector 3 in the welding gun rear seat 11 can be indirectly adjusted to meet the adjustment requirements under different working conditions.

[0059] The motor fixing seat 4 and the clamping piece 5 in the embodiment are arranged at the radial outer side of the galvanometer motor 2, preferably, the motor fixing seat 4 and the clamping piece 5 are integrated structure. The clamping piece 5 is connected to the motor fixing seat 4, and the two are integrated structure, which can make the galvanometer motor 2 rotate under the action of the clamping piece 5, and after the clamping piece 5 is clamped and fixed to the galvanometer motor 2, the motor fixing seat 4 is integrally connected to the welding gun body 1, thereby effectively improving the stability of the installation of the galvanometer motor 2.

[0060] Specifically, the motor fixing seat 4 and the clamping piece 5 are arranged on the machine body of the galvanometer motor 2 exposed to the rear seat 11, which can make the clamping piece 5 clamp and fix the galvanometer motor 2, and make the galvanometer motor 2, the motor fixing seat 4 and the clamping piece 5 connected as an integrated structure. When connected and installed, first loosen the clamping piece 5, adjust the installation angle of the reflector 3 by rotating the galvanometer motor 2, lock the clamping piece 5 after determining that the center line of the reflector 3 coincides with the center line of the laser light zero, then connect the motor fixing seat 4 together with the galvanometer motor 2 to the welding gun rear seat 11, and finally realize the installation and fixation of the galvanometer motor 2 on the welding gun body 1 through the connection of the motor fixing seat 4 and the rear seat 11.

[0061] By arranging the clamping piece 5 between the motor fixing seat 4 and the tail end of the galvanometer motor 2, the clamping piece 5 can clamp the machine body of the galvanometer motor 2 exposed to the welding gun rear seat 11, avoiding interference with other components during clamping and fastening, and enhancing the operability of adjustment and installation.

[0062] Preferably, the motor fixing seat 4 and the clamping piece 5 are integrated structure, which can facilitate the installation of the galvanometer motor 2 on the integrated structure, so that the galvanometer motor 2 can be installed on the welding gun rear seat 11 through the motor fixing seat 4 and the clamping piece 5 at the same time, thereby ensuring the installation reliability to the maximum extent.

[0063] The gap between the motor fixing seat 4 and the clamping piece 5 provides an operation space for the adjustment of the angle of the galvanometer motor 2, which facilitates the disassembly and assembly operation of the galvanometer motor 2 on the clamping piece 5, and further improves the efficiency of the position adjustment of the galvanometer motor 2 and the reflector 3.

[0064] Based on the integrated structure of the motor fixing seat 4 and the clamping piece 5, the clamping piece 5 is composed of a fixed block 51 and a movable block 52. The clamping piece 5 is a C-shaped structure, and preferably, the fixed block 51 and the movable block 52 are both C-shaped. The C-shaped clamping piece 5 can better fit and clamp the galvanometer motor 2, and facilitate the rotation of the galvanometer motor 2 inside the C-shaped clamping piece 5, thereby achieving the purpose of adjusting the installation angle of the galvanometer motor 2.

[0065] Specifically, the fixed block 51 is integrally connected to the motor fixing seat 4, and a gap is provided between the fixed block 51 and the motor fixing seat 4. The movable block 52 is arranged opposite to the fixed block 51, forming a detachable connection relationship. A cutting groove 53 is provided between the movable block 52 and the motor fixing seat 4, and the cutting groove 53 is provided on the gap between the fixed block 51 and the motor fixing seat 4. The movable block 52, which is formed by directly processing the cutting groove 53 on the motor fixing seat 4, has a certain amount of mobility. By providing connecting holes on the fixed block 51 and the movable block 52, and connecting them by a clamp through a connecting piece (not shown in the figure), the clamp installation of the galvanometer motor 2 is achieved. The connecting piece can be in the form of a movable bolt and a nut, etc., which is convenient for connecting the galvanometer motor 2 by clamping between the fixed block 51 and the movable block 52.

[0066] In this embodiment, the connection between the welding gun body 1 and the motor mount 4 is a cylindrical structure. The radially inner walls of the fixed block 51 and the movable block 52 are each provided with an arcuate surface that mates with the sidewall of the galvanometer motor 2. These arcuate surfaces, respectively provided on the fixed block 51 and the movable block 52, mate with the radially outer cylindrical surface of the galvanometer motor 2, ensuring the reliability of the clamp while also allowing the galvanometer motor 2 to rotate axially for adjustment of the galvanometer angle.

[0067] In addition to the aforementioned columnar structure, in another specific embodiment, the connection between the welding gun body 1 and the motor mount 4 is a spherical structure, and the connection between the motor mount 4 and the galvanometer motor 2 is also provided with a spherical structure. The radially inner sidewalls of the fixed block 51 and the movable block 52 are respectively provided with spherical surfaces that can mate with the outer sidewall of the galvanometer motor 2. This arrangement enables the galvanometer motor 2 to rotate throughout the three-dimensional circumference, further increasing the range of angle adjustment of the galvanometer motor 2 and the reflector 3.

[0068] The motor fixing seat 4 in this embodiment is connected to the installation end face of the rear seat 11, which can make the installation surface of the motor fixing seat 4 fit closely with the end face of the rear seat 11, reducing the difficulty of the installation operation. At the same time, in order to facilitate the locking of the screw 6 on the motor fixing seat 4, the hoop 5, the motor fixing seat 4 and the galvanometer motor 2 are concentrically arranged, and the outline size of the hoop 5 is smaller than the outline size of the motor fixing seat 4, which can avoid the interference of the hoop 5 and the operating tool, and enhance the operability of the connection and installation of the motor fixing seat 4.

[0069] See also Figure 4 A rear cover 12 of the laser welding gun is also provided on the end face of the rear seat 11. The welding gun rear cover 12 is detachably connected to the end face of the rear seat 11 by screws 6. Through this arrangement, the galvanometer motor 2 can be adjusted and fixed more conveniently while protecting the galvanometer motor 2.

[0070] It should be noted that, unless there is any conflict, the features in the embodiments of this application can be combined with each other.

[0071] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A laser welding gun, comprising a welding gun body, a galvanometer motor, and a reflector mounted on the galvanometer motor, characterized in that: A motor fixing seat and a hoop are provided between the welding gun body and the galvanometer motor, and the galvanometer motor is connected to the welding gun body through the hoop and the motor fixing seat; the connecting part between the welding gun body and the motor fixing seat is a cylindrical structure, and the connecting part between the motor fixing seat and the galvanometer motor is provided with a cylindrical structure; the cylindrical axis provided on the welding gun body and the motor fixing seat is arranged horizontally, and the horizontally arranged cylindrical axis limits the adjustment direction of the laser, so that the galvanometer motor is adjusted along the cylinder, and the reflected laser is adjusted in the vertical direction; the axes of the two cylinders on the welding gun body and the motor fixing seat can constitute the central plane of the welding gun body, and the plane where the axis of the galvanometer motor is located is perpendicular to the central plane formed by the axes of the two cylinders. When the galvanometer motor is adjusted, it is ensured that the central axis of the galvanometer motor can always intersect with the axes of the two cylinders, so that the laser reflection point is located at the center of the reflector; The cylinder arranged on the welding gun body is an outward convex cylinder, and the motor fixing seat is provided with a corresponding inward concave cylinder; the central axis of the galvanometer motor can always intersect with the axis centers of the two cylinders, and the axis centers of the outward convex cylinder and the inward concave cylinder are both located on the center of the reflector; the welding gun body, the motor fixing seat and the galvanometer motor are installed concentrically, so that the reflected laser can only be adjusted in the vertical direction; the motor fixing seat is provided with a long strip hole, which is a plurality of symmetrically arranged long strip holes, and the long sides of the long strip holes are arranged vertically; the motor fixing seat is adjusted to the installation position in the up and down directions of the rear seat, and the galvanometer motor can be adjusted in two dimensions of up and down position and rotation angle in combination with the hoop.

Images