Laser welding galvanometer system with self-contained cold and heat exchange flow channel

Abstract

The self-cold-heat exchange flow channel type laser welding galvanometer system disclosed by the application comprises a base, a dynamic focusing module and a same-rotation mirror module, a cold-heat exchange flow channel is arranged in the base and is in communication with each other, the laser welding galvanometer system further comprises a mirror adjusting module, the vertical distance from the entrance of a laser input channel to the center of the mirror of the mirror adjusting module is H, the vertical distance from the mirror of the mirror adjusting module to the center of the first turnover mirror unit is L, and H is greater than or equal to 2.5L. In the synchronous and same-speed turnover of the first and second turnover mirror units, not only the motion inertia outside the axial movement of the focusing lens is controlled to keep the optical axis concentric, but also the rotational inertia formed by the turnover mirror and the driving member is consistent, the structure is miniaturized in a specific height and length ratio, and the internal elements can be cooled.

Description

[0001] This application is a divisional application of application number 202310265873.4, filed on March 20, 2023, entitled "Laser Welding Galvanometer System Based on X, Y, and Z Axis Motion". Technical Field

[0002] This invention belongs to the field of laser galvanometer technology, specifically relating to a laser welding galvanometer system with a built-in hot and cold exchange flow channel. Background Technology

[0003] In simple terms, a galvanometer is a scanning galvanometer used in the laser industry; its professional term is high-speed scanning galvanometer (also known as a Galvo scanning system). A galvanometer, also called an ammeter, follows the design principles of an ammeter, with a lens replacing the needle. The probe signal is replaced by a computer-controlled -5V to 5V or -10V to 10V DC signal to complete the predetermined action. Similar to rotating mirror scanning systems, this typical control system uses a pair of reflecting mirrors. However, the stepper motor driving these mirrors is replaced by a servo motor. In this control system, the use of position sensors and the design of a negative feedback loop further ensure the system's accuracy, achieving a new level of scanning speed and repeatability.

[0004] However, in actual use, the following technical defects may exist:

[0005] 1) During the high-speed reciprocating motion of the folding mirror, if the center of gravity of the mounted mirror becomes unstable, or if inertia is generated in a direction other than the direction of motion, the mirror itself will deflect relatively, thus directly affecting the degree of concentricity and resulting in low focusing accuracy.

[0006] 2) The incident angle and output angle of conventional lasers are perpendicular, which makes it difficult to meet processing needs in some special working conditions;

[0007] 3) Once the travel distance of the folding mirror is set, it cannot be extended or adjusted, which greatly limits its use;

[0008] 4) For mirrors that rotate synchronously, that is, mirrors that rotate synchronously around the vertical and horizontal directions, if their center of gravity cannot be on the axis of the motor, the resulting moment of inertia will be inconsistent. Therefore, there will be a shift during synchronous rotation, which will directly affect the quality of product welding.

[0009] 5. The inability to dissipate heat (heat exchange) from internal components results in insufficient optical thermal stability and driving accuracy of the driver. Summary of the Invention

[0010] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide an improved laser welding galvanometer system with integrated hot and cold exchange flow channel.

[0011] To solve the above technical problems, the present invention adopts the following technical solution: a laser welding galvanometer system with a built-in hot and cold exchange channel, comprising a base with a laser input channel and a laser output channel, a dynamic focusing module, and a co-rotating mirror module. The co-rotating mirror module includes a first flip-reflector unit and a second flip-reflector unit. A hot and cold exchange channel is provided within the base, and the laser input channel and laser output channel are parallel to each other and both extend along the Z-axis. The laser welding galvanometer system further includes a mirror adjustment module that reflects the light path along the Z-axis to form a light path along the Y-axis towards the first flip-reflector unit. The laser input channel's self-... The vertical distance from the inlet of the device base to the center of the reflector of the reflector adjustment module is H, and the vertical distance from the reflector of the reflector adjustment module to the center of the first flip reflector unit is L, where H ≥ 2.5L; and on the Z-axis, the center of the laser input channel, the center of the focusing lens of the dynamic focusing module, and the center of the reflector of the reflector adjustment module coincide; the first flip reflector unit and the second flip reflector unit flip synchronously and at the same speed, and on the Y-axis, the centers of the first flip reflector unit and the reflector of the reflector adjustment module are kept aligned and the distance remains unchanged; and on the X-axis, the centers of the reflectors of the first flip reflector unit and the second flip reflector unit are kept aligned and the distance remains unchanged.

[0012] Preferably, the first flip mirror unit includes a first power member with a drive shaft extending along the Z-axis and a first flip mirror fixedly connected to the drive shaft via a first clamp. The first flip mirror is symmetrically arranged about the axis of the drive shaft and forms an upper trapezoidal part, a rectangular part, and a lower trapezoidal part from top to bottom. This structure is mainly designed to facilitate the use of chamfered edges on the lens and the lens holder so that the center of mass is on the motor axis, enabling synchronous and high-speed movement with the motor and ensuring consistent rotational inertia, thereby improving the stability of the movement along the X-axis during laser welding. In some specific embodiments, the upper trapezoidal portion gradually increases in length from top to bottom, the rectangular portion extends vertically towards each other from the lower end of the upper trapezoidal portion, and the lower trapezoidal portion gradually decreases in length from top to bottom from the lower end of the rectangular portion. This structural limitation further facilitates clamping and positioning in the vertical direction and is more conducive to reciprocating flipping around the Z-axis. Moreover, when the first flipping mirror reciprocates, the distance between the center of the reflective surface of the first flipping mirror and the center of the reflective surface of the reflective mirror adjustment module remains unchanged, resulting in a very stable and concentrated optical path formed from the first flipping reflective mirror unit to the second flipping reflective mirror unit, which is beneficial to improving welding quality. Meanwhile, in some specific embodiments, the height of the upper trapezoidal portion is greater than the height of the lower trapezoidal portion; the length change rate of the upper trapezoidal portion is greater than the length change rate of the lower trapezoidal portion. This structure further facilitates clamping and positioning in the vertical direction and is more conducive to reciprocating flipping around the Z-axis. Moreover, when the first flipping mirror reciprocates, the distance between the center of the mirror surface of the first flipping mirror and the mirror surface of the mirror of the mirror adjustment module remains unchanged, resulting in a very stable and concentrated optical path from the first flipping mirror unit to the second flipping mirror unit, which is beneficial to improving welding quality.

[0013] According to a specific embodiment and preferred aspect of the present invention, the inner surface of the first flip mirror is a planar reflective surface, and faces the reflector of the reflector adjustment module; and / or, the first clamping seat includes a first base body coaxially connected to the drive shaft, a first clamping plate and a second clamping plate extending downward from the lower part of the first base body and forming a clamping area, wherein the first flip mirror is inserted into the clamping area from the upper end of the upper trapezoidal portion, the first clamping plate and the second clamping plate respectively clamp the inner and outer sides of the upper trapezoidal portion, and the lower end of the outer second clamping plate is located below the lower end of the first clamping plate. This greatly facilitates the assembly of the lens.

[0014] According to another specific embodiment and preferred aspect of the present invention, the outer surface of the first flip mirror includes a back surface located in the middle, a left folded surface and a right folded surface that bend inward from the left and right sides of the back surface and extend to the left and right edges, wherein the left folded surface and the right folded surface are symmetrically arranged about the Z-axis centerline of the back surface, and the formed bending edges pass through the upper trapezoidal portion, the rectangular portion and the lower trapezoidal portion sequentially from top to bottom; and / or, the angle formed by the left folded surface and the right folded surface with the reflective mirror surface is an acute angle; and / or, the edge thickness of the left and right ends corresponding to the left folded surface and the right folded surface is 1 / 6 to 1 / 3 of the thickness of the first flip mirror. This structural design is more conducive to rotation control, significantly improves stability, and thus ensures consistent rotational inertia. Preferably, the angles formed by the left and right folded surfaces and the reflective mirror surface are acute angles, preferably 10° to 30°, with 18° to 25° being optimal. Meanwhile, the edge thickness of the left and right ends corresponding to the left and right folded surfaces is 1 / 6 to 1 / 3 of the thickness of the first flip mirror. Generally, the edge thickness is about 1 / 5 of the thickness of the first flip mirror. Under this structural design, the effective reflective surface formed is optimal, and the resulting moment of inertia is consistent with the moment of inertia generated by the motor output.

[0015] According to another specific embodiment and preferred aspect of the present invention, the second flip-reflector unit includes a second power member whose flip axis extends along the Y-axis, and a second flip mirror fixedly connected to the flip axis via a second clamp. The reflective surface of the second flip mirror faces the reflective surface of the first flip mirror, and the reflective surfaces of the two mirrors are intersecting. When the first and second flip mirrors flip synchronously and at the same speed, the distance between the centers of their reflective surfaces remains constant along the X-axis. Here, the relative positions of the first and second flip mirrors are further defined, and can be adjusted along the X-axis according to the size of the formed welding area.

[0016] In some specific embodiments of the present invention, the reflective surface of the second flip mirror is planar and includes a uniform thickness portion extending along the Y-axis, an upper folded portion that gradually thins from the upper part of the uniform thickness portion upwards, and a lower folded portion that gradually thins from the lower part of the uniform thickness portion downwards. The upper and lower folded portions are symmetrically arranged about the Y-axis, and the second clamp is held at one end of the uniform thickness portion. This facilitates the processing and installation of the second flip mirror.

[0017] In some specific embodiments of the present invention, the upper and lower edges of the back surface of the equal-thickness portion are inclined inwards, and the resulting inclined surfaces are flush with the inclined surfaces formed by the upper and lower folds; and / or, the edge thickness of the upper and lower ends of the upper and lower folds is 1 / 6 to 1 / 3 of the thickness of the equal-thickness portion. The two ends of the upper and lower folds are inclined inwards, with the inclination angle formed at the end closer to the second clamp being greater than the inclination angle formed at the end farther from the second clamp. With this structural design, the effective reflective surface is optimal, and the resulting moment of inertia is consistent with the moment of inertia generated by the motor output, thereby improving the stability of the laser welding motion along the Y-axis.

[0018] According to another specific embodiment and preferred aspect of the present invention, the dynamic focusing module includes a focusing base, a lens mount slidably mounted on the focusing base via a linear slide rail, a focusing lens mounted on the lens mount with its axis parallel to the sliding direction of the lens mount, and a driver for driving the lens mount to reciprocate, wherein the center of the focusing lens and the center of the lens mount are aligned, and the line connecting their centers is parallel to the X-axis; the driver includes a drive motor mounted on the focusing base and extending along the Y-axis, and a transmission rod for drivingly connecting the output shaft of the drive motor to the lens mount, wherein the transmission rod converts the circular motion of the output shaft into linear motion to drive the lens mount to slide up and down reciprocally along the length of the linear slide rail. Here, the high-speed reciprocating motion of the lens is completed very stably, and the alignment of the centers of the focusing lens and the lens mount, with the line connecting their centers parallel to the X-axis, results in smooth movement of the lens itself, effectively controlling the moment of inertia of the focusing lens outside the axial direction to maintain optical axis concentricity and improve focusing accuracy.

[0019] Specifically, the lifting and adjusting component includes an adjusting screw extending along the Z-axis, a drive unit that drives the adjusting screw to rotate, and an adjusting base that cooperates with the adjusting screw and is fixed relative to the focusing mount, wherein the adjusting screw and the adjusting base form an adjusting screw module. Here, by moving the focusing mount up and down, the focusing stroke of the focusing lens is increased, thereby improving practicality.

[0020] Furthermore, the reflector adjustment module includes an adjustment base and a plane reflector mounted on the adjustment base and capable of adjusting its tilt angle around the X-axis. Optical path channels are formed on the Y-axis and Z-axis of the adjustment base, respectively, and the plane reflector is tilted within the coordinate system formed by the Y-axis and Z-axis. Therefore, by fine-tuning the plane reflector, the optical path can be redirected from vertical to horizontal; typically, its tilt angle is approximately 45°.

[0021] Preferably, the adjustment module base forms two optical path channels on the Y-axis: one facing the reflector of the first flip-reflector unit, and the other forming a viewing window via a right-angle connector. Here, the external viewing window allows connection to a remote monitoring device, enabling real-time remote monitoring of the operating status.

[0022] Furthermore, an optical lens is positioned close to the plane mirror between the plane mirror and the focusing lens. The focusing lens is a concave lens with concave surfaces on both sides, and the optical lens is a convex lens with convex surfaces on both sides. The focusing lens, the double-sided convex lens, and the plane mirror are arranged with their centers overlapping from top to bottom. This top-down lens design effectively converges the laser beam, allowing the beam output from the laser output channel to be relatively concentrated for welding, thereby improving welding efficiency and effectiveness.

[0023] Due to the implementation of the above technical solutions, the present invention has the following advantages compared with the prior art:

[0024] Existing dynamic focusing devices cannot maintain optical axis concentricity during high-speed reciprocating motion of the galvanometer, effectively control the deflection inertia generated by the axial movement of the lens, maintain parallel laser incident and emission angles during welding, address the inconsistency in rotational inertia between the flip mirror and the driving component, prevent the laser from causing unstable motion on the X and Y axes, and fail to dissipate heat (heat exchange) from internal components. These deficiencies result in insufficient optical thermal stability and driving accuracy of the driver. This invention cleverly solves these shortcomings of existing structures through an overall design of the galvanometer system. This system utilizes a reflector adjustment module to reflect light along the Z-axis, forming a light path along the Y-axis, which is then directed to the reflector of the first flip-reflector unit. The first flip-reflector unit then reflects the light beam to the reflector of the second flip-reflector unit, and finally, the second flip-reflector unit reflects it downwards, achieving parallelism between laser input and output. Simultaneously, the synchronous and simultaneous flipping of the first and second flip-reflector units ensures the movement and coverage of the processing surface formed by the X and Y axes. Furthermore, the reciprocating motion of the focusing lens along the Z-axis controls the thickness of the processing surface, enabling continuous welding of the product. Additionally, the inflow of cooling fluid further cools the optical components, drive components, and control chips, etc. The heat dissipation (heat exchange) is achieved. Therefore, compared with the existing structure, under the premise of keeping the center of the first flip mirror and the center of the plane mirror aligned and the distance unchanged on the Y-axis, and keeping the center of the first flip mirror and the center of the second flip mirror aligned and the distance unchanged on the X-axis, the synchronous and same-speed flipping of the first flip mirror unit and the second flip mirror unit not only controls the motion inertia of the focusing lens outside the axis to keep the optical axis concentric, but also makes the rotational inertia formed by the flip mirror and the driving component consistent. At the same time, the direction of the optical path can also make the laser incident angle and the emission angle parallel, and make the structure miniaturized within a specific height and length ratio. Moreover, the built-in heat exchange channel can dissipate heat from the internal components, improve optical thermal stability and driving accuracy of the driver. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the laser welding galvanometer system based on X, Y, and Z axis motion according to the present invention.

[0026] Figure 2 for Figure 1 A schematic diagram of the local structural decomposition;

[0027] Figure 3 for Figure 1 A schematic diagram of the structure of the dynamic focusing module;

[0028] Figure 4 for Figure 3Front view diagram;

[0029] Figure 5 for Figure 4 A left-view diagram;

[0030] Figure 6 for Figure 1 A schematic diagram of the structure of the rotating mirror module;

[0031] Figure 7 for Figure 6 Front view diagram;

[0032] Figure 8 for Figure 7 A left-view diagram;

[0033] Among them: 1. Base; 10. Laser input channel; 11. Laser output channel;

[0034] 2. Dynamic focusing module; 20. Focusing mount; 21. Linear slide rail; 22. Lens mount; 23. Focusing lens; 24. Driver; 240. Drive motor; 241. Transmission rod; 25. Lifting and adjusting component; 250. Adjusting screw; 251. Drive component; 252. Adjusting base;

[0035] 3. Rotating mirror module; 31. First flip mirror unit; 310. First power component; q. Drive shaft; 311. First clamp; a1. First base; a2. First clamping plate; a3. Third clamping plate; 312. First flip mirror; b1. Upper trapezoidal part;

[0036] b2, rectangular section; b3, lower trapezoidal section; m1, back side; m2, left folded surface; m3, right folded surface; y, bent edge; 32, second flip-reflector unit; 320, second power component; f, flip shaft; 321, second clamp; 322, second flip mirror; d1, equal thickness section; d2, upper folded section; d3, lower folded section;

[0037] 4. Mirror adjustment module; 40. Adjustment module base; 41. Plane mirror; 42. Optical lens;

[0038] 5. QBH collimator; 6. Protective window; s. Viewing mirror window. Detailed Implementation

[0039] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0040] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0042] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0043] In this invention, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0044] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0045] like Figures 1 to 8 As shown, the laser welding galvanometer system based on X, Y, and Z axis motion involved in this embodiment includes a base 1, a dynamic focusing module 2, a co-rotating reflector module 3, and a reflector adjustment module 4. The top and bottom of the base 1 form a parallel laser input channel 10 and a laser output channel 11, respectively. The dynamic focusing module 2 reciprocates along the Z-axis. The co-rotating reflector module 3 can emit laser from the laser output channel 11 and form a welding surface covering the coordinate system composed of the X and Y axes, thereby forming 3D motion for welding in the three-dimensional coordinate system composed of X, Y, and Z. At the same time, under the optical path adjustment of the reflector adjustment module 4, the beam input and output are parallel to complete the 3D welding.

[0046] In this example, the base 1 is a cuboid extending vertically, the dynamic focusing module 2 is positioned close to the laser input channel 10, the mirror adjustment module 4 is installed below the dynamic focusing module 2 and located at the bottom left side, and the rotating mirror module 3 is located above the laser output channel 11.

[0047] Combination Figures 1 to 5 As shown, the dynamic focusing module 2 includes a focusing base 20, a lens mount 22 slidably mounted on the focusing base 20 via a linear slide rail 21, a focusing lens 23 mounted on the lens mount 22 with its axis parallel to the sliding direction of the lens mount 22, a driver 24 that drives the lens mount 22 to reciprocate, and a lifting adjustment component 25.

[0048] In this example, the linear slide rail 21 extends along the Z-axis, the lens mount 22 is slidably mounted on the linear slide rail 21, and the focusing lens 23 is a concave lens with concave surfaces on both the top and bottom, and is horizontally positioned by fitting the inner wall of the lens mount 22 from the circumferential direction. The center of the focusing lens 23 is aligned with the center of the lens mount 22, and the line connecting their centers is parallel to the X-axis. The focusing lens 23 is a concave lens with concave surfaces on both the top and bottom. The driver 24 includes a drive motor 240 mounted on the focusing mount 20 and extending along the Y-axis, used to drive the drive motor 240. The output shaft is connected to the lens mount 22 via a transmission rod 241, which converts the circular motion of the output shaft into linear motion to drive the lens mount 22 to slide up and down along the length of the linear slide rail 21. The lifting adjustment component 25 includes an adjustment screw 250 extending along the Z-axis, a drive component 251 that drives the adjustment screw 250 to rotate, and an adjustment base 252 that cooperates with the adjustment screw 250 and is fixed relative to the focusing seat 20. The adjustment screw 251 and the adjustment base 252 form an adjustment screw module.

[0049] Combination Figure 1 , Figure 2 and Figures 6 to 8 As shown, the rotating mirror module 3 includes a first flip mirror unit 31 and a second flip mirror unit 32. The first flip mirror unit 31 and the second flip mirror unit 32 reciprocate around the Z-axis and Y-axis directions respectively and reflect the laser from the laser output channel 11 downwards. At the same time, the processing and welding surface formed in the motion coordinate system of the X-axis and Y-axis covers the surface of the product.

[0050] Specifically, the first flip-up mirror unit 31 includes a first power component 310 extending along the Z-axis direction of the drive shaft q, and a first flip-up mirror 312 fixedly connected to the drive shaft via a first clamp 311. The first power component 310 is a commonly used motor. The first clamp 311 includes a first base a1 coaxially connected to the drive shaft q, a first clamping plate a2 extending downward from the lower part of the first base a1 and forming a clamping area, and a second clamping plate a3. The first flip-up mirror 312 is symmetrically arranged about the axis of the drive shaft q. The first flip mirror 312 is positioned such that its center of gravity is located on the center line of the drive shaft q (or, in other words, the center line of the first flip mirror 312 coincides with the center line of the drive shaft q). In this example, the first flip mirror 312 includes an upper trapezoidal portion b1, a rectangular portion b2, and a lower trapezoidal portion b3 formed from top to bottom. The upper trapezoidal portion b1 gradually increases in length from top to bottom, the rectangular portion b2 extends vertically towards each other from the lower end of the upper trapezoidal portion b1, and the lower trapezoidal portion b3 gradually decreases in length from top to bottom from the lower end of the rectangular portion b2.

[0051] In this example, the inner surface of the first flip mirror 312 is a flat reflective surface and faces the reflective mirror adjustment module 4. Specifically, the first flip mirror 312 is inserted into the clamping area from the upper end of the upper trapezoidal part b1. The first clamping plate a2 and the second clamping plate a3 are respectively clamped on the inner and outer sides of the upper trapezoidal part b1, and the lower end of the outer second clamping plate a3 is located below the lower end of the first clamping plate a2. The outer surface of the first flip mirror 312 includes a back surface m1 located in the middle, a left folded surface m2 and a right folded surface m3 that bend inward from the left and right sides of the back surface m1 and extend to the left and right edges. The left folded surface m2 and the right folded surface m3 are symmetrically arranged about the Z-axis center line of the back surface m1, and the bending edge y formed therein passes through the upper trapezoidal part b1, the rectangular part b2 and the lower trapezoidal part b3 from top to bottom. In this example, the angle formed by the left folded surface m2 and the right folded surface m3 with the reflective mirror surface is an acute angle (18° to 25°). At the same time, the edge thickness of the left and right ends corresponding to the left folded surface m2 and the right folded surface m3 is about 1 / 5 of the thickness of the first flip mirror.

[0052] The height of the upper trapezoidal portion b1 is greater than the height of the lower trapezoidal portion b3, and the rate of change of the length of the upper trapezoidal portion b1 is greater than the rate of change of the length of the lower trapezoidal portion b2. This structure further facilitates clamping and positioning in the vertical direction and is more conducive to reciprocating flipping around the Z-axis. Moreover, when the first flipping mirror 312 reciprocates, the distance between the reflective surface of the first flipping mirror 312 and the center of the reflective surface of the reflective mirror of the reflective mirror adjustment module 4 remains unchanged, resulting in a very stable and concentrated optical path formed from the first flipping reflective mirror unit 31 to the second flipping reflective mirror unit 32, which is beneficial to improving welding quality.

[0053] The second flip mirror unit 32 includes a second power member 320 whose flip axis extends along the Y-axis and a second flip mirror 322 which is fixedly connected to the flip axis f via a second clamp 321. The center of gravity of the second flip mirror 322 is located on the center line of the flip axis f (or, the center line of the second flip mirror 322 coincides with the center line of the flip axis f). At the same time, the reflective surface of the second flip mirror 322 faces the reflective surface of the first flip mirror 312, and the reflective surfaces of the two are intersecting. When the first flip mirror 312 and the second flip mirror 322 flip synchronously and at the same speed, the distance between the centers of the reflective surfaces of the two mirrors remains unchanged on the X-axis.

[0054] In this example, the reflective surface of the second flip mirror 322 is a plane, and includes a uniform thickness portion d1 extending along the Y-axis with equal lens thickness, an upper fold portion d2 that gradually thins from the upper part of the uniform thickness portion d1 upwards, and a lower fold portion d3 that gradually thins from the lower part of the uniform thickness portion d1 downwards. The upper and lower edges of the back surface of the uniform thickness portion d1 are inclined inwards, and the inclined surface formed is flush with the inclined surface formed by the upper fold portion d2 and the lower fold portion d3. At the same time, the upper fold portion d2 and the lower fold portion d3 are symmetrically arranged about the Y-axis. The second clamp is held at the right end of the uniform thickness portion d1, and the edge thickness of the upper and lower ends of the upper fold portion d2 and the lower fold portion d3 is about 1 / 5 of the thickness of the uniform thickness portion d1. In this example, the two ends of the upper fold d2 and the lower fold d3 are inclined inwards respectively. The inclination angle formed by the end closer to the second clamp 321 is greater than the inclination angle formed by the end farther away from the second clamp 321. At the same time, the second clamp 321 and the first clamp 311 have the same structure, which will not be described in detail here, but is also clear and feasible.

[0055] The reflector adjustment module 4 reflects the light path along the Z-axis to form a light path along the Y-axis, which is then directed towards the first flip-up reflector unit. Specifically, the reflector adjustment module 4 includes an adjustment module base 40, a plane reflector 41 mounted on the adjustment module base 40 and capable of adjusting its tilt angle around the X-axis, and an optical lens 42 positioned between the plane reflector 41 and the focusing lens 23 and close to the plane reflector 41. Light path channels are formed on the Y-axis and Z-axis of the adjustment module base 40, respectively, and the plane reflector 41 is tilted in the coordinate system formed by the Y-axis and Z-axis.

[0056] In this example, the adjustment module 40 forms two optical path channels on the Y-axis: one facing the first flip mirror 312 of the first flip mirror unit 31, and the other forming a viewing window s through a right-angle connector. Simultaneously, on the Z-axis, the centers of the laser input channel 10, the focusing lens 23, and the plane mirror 41 coincide; the optical lens 42 is a convex lens with convex surfaces on both sides, and the focusing lens 23, the double-sided convex lens, and the plane mirror 41 are arranged with their centers coincident from top to bottom.

[0057] The vertical distance from the entrance of the laser input channel 10 to the center of the plane mirror 41 is H, and the vertical distance from the plane mirror 41 to the center of the first flip mirror 312 is L, where H is approximately 2.9 times L. The angle formed by the plane mirror 41 and the horizontal plane is approximately 45°. In the initial state, the angle between the first flip mirror 312 and the plane formed by the Y and Z axes is approximately 35°, and the angle between the second flip mirror 322 and the plane formed by the X and Y axes is approximately 27.5°. The first flip mirror 312 flips back and forth around the Z axis between 45° and 55°, and the second flip mirror 322 flips back and forth around the Y axis between 37.5° and 47.5°.

[0058] In addition, the aforementioned laser welding galvanometer system based on X, Y, and Z three-axis motion also includes a heat exchange channel that forms the interior of the formwork 1 and is interconnected with each other, as well as a QBH collimator 5 and a protective window 6 that are connected to the laser input channel 10 and the laser output channel 11 respectively. Specifically, the heat exchange channel mainly dissipates heat (heat exchange) on the optical components, drive components, and control chips after the inflow of cooling fluid, thereby improving the optical thermal stability and the drive accuracy of the driver; the QBH collimator 5 is a conventional standard part, and the light inlet is located at the top; the protective window 6 mainly reduces safety hazards during the welding process.

[0059] As can be seen from the above, by adopting this system, the reflectors of the reflector adjustment module can reflect the light path along the Z-axis to form a light path along the Y-axis, which is then directed to the reflector of the first flip-reflector unit. The first flip-reflector unit then reflects the light beam to the reflector of the second flip-reflector unit, and finally, the second flip-reflector unit reflects it downwards, thus achieving parallelism between the laser input and output. Simultaneously, the synchronous and simultaneous flipping of the first and second flip-reflector units achieves motion coverage of the processing surface formed by the X and Y axes. Furthermore, the reciprocating motion of the focusing lens along the Z-axis controls the stroke in the thickness direction of the processing surface, thereby continuously completing the welding process of the product. Therefore, compared with existing structures, on the one hand, it not only controls the moment of inertia of the focusing lens outside the axial direction to maintain optical axis concentricity, but also... Furthermore, it ensures that the rotational inertia formed by the flip mirror and the driving component is consistent; on the other hand, it maintains the center of the laser input channel, the center of the focusing lens, and the center of the plane mirror on the Z-axis; it maintains the center of the first flip mirror and the center of the plane mirror aligned and the distance between them on the Y-axis; and it maintains the center of the first flip mirror and the center of the second flip mirror aligned and the distance between them on the X-axis, effectively implementing the upward movement of the X, Y, and Z axes with the laser incident angle and the emission angle in parallel to complete the high-precision focusing and welding of the product; thirdly, through the design of the flow channel, it can effectively dissipate heat from the internal parts, improve optical thermal stability and the driving accuracy of the driver, and further improve the accuracy of dynamic focusing; fourthly, by moving the focusing mount up and down, it increases the focusing stroke of the focusing lens, improving practicality.

[0060] The present invention has been described in detail above, with the aim of enabling those skilled in the art to understand and implement the invention. However, this description should not be construed as limiting the scope of protection of the invention. All equivalent changes or modifications made in accordance with the spirit and essence of the invention should be included within the scope of protection of the invention.

Claims

1. A laser welding galvanometer system with a built-in hot and cold exchange flow channel, comprising a base with a laser input channel and a laser output channel, a dynamic focusing module, and a co-rotating mirror module, wherein the co-rotating mirror module comprises a first flip mirror unit and a second flip mirror unit, characterized in that: The device is equipped with interconnected hot and cold exchange channels. The laser input channel and laser output channel are parallel to each other and both extend along the Z-axis. The laser welding galvanometer system also includes a mirror adjustment module that reflects the light path along the Z-axis to form a light path along the Y-axis and directs it toward the first flip mirror unit. The vertical distance from the laser input channel entrance to the center of the mirror of the mirror adjustment module is H, and the vertical distance from the mirror of the mirror adjustment module to the center of the first flip mirror unit is L, where H ≥ 2.5L. On the Z-axis, the center of the laser input channel, the center of the focusing lens of the dynamic focusing module, and the center of the mirror of the mirror adjustment module coincide. The first flip mirror unit and the second flip mirror unit flip synchronously and at the same speed, and on the Y-axis, the centers of the mirrors of the first flip mirror unit and the mirror adjustment module are aligned and the distance remains constant. And keep the centers of the first and second flip mirror units aligned and the distance between them constant on the X-axis.

2. The laser welding galvanometer system with integrated hot and cold exchange flow channel according to claim 1, characterized in that: The first flip mirror unit includes a first power member with a drive shaft extending along the Z-axis and a first flip mirror fixedly connected to the drive shaft via a first clamp. The first flip mirror is symmetrically arranged about the axis of the drive shaft and forms an upper trapezoidal portion, a rectangular portion, and a lower trapezoidal portion from top to bottom; and / or, the height of the upper trapezoidal portion is greater than the height of the lower trapezoidal portion; and / or, the length change rate of the upper trapezoidal portion is greater than the length change rate of the lower trapezoidal portion.

3. The laser welding galvanometer system with integrated hot and cold exchange flow channel according to claim 2, characterized in that: The inner surface of the first flip mirror is a planar reflective surface and faces the reflective mirror adjustment module; and / or, the first clamping seat includes a first seat body coaxially connected to the drive shaft, a first clamping plate and a second clamping plate extending downward from the lower part of the first seat body and forming a clamping area, wherein the first flip mirror is inserted into the clamping area from the upper end of the upper trapezoidal part, the first clamping plate and the second clamping plate are respectively clamped on the inner and outer sides of the upper trapezoidal part, and the lower end of the outer second clamping plate is located below the lower end of the first clamping plate.

4. The laser welding galvanometer system with integrated hot and cold exchange flow channel according to claim 3, characterized in that: The outer surface of the first flip mirror includes a back surface located in the middle, a left folded surface and a right folded surface that bend inward from the left and right sides of the back surface and extend to the left and right edges, wherein the left folded surface and the right folded surface are symmetrically arranged about the Z-axis center line of the back surface, and the bending edges formed therein pass through the upper trapezoidal part, the rectangular part and the lower trapezoidal part from top to bottom; and / or, the angle formed by the left folded surface and the right folded surface with the reflective mirror surface is an acute angle; and / or, the edge thickness of the left and right ends corresponding to the left folded surface and the right folded surface is 1 / 6 to 1 / 3 of the thickness of the first flip mirror.

5. The laser welding galvanometer system with integrated hot and cold exchange flow channel according to claim 2, 3, or 4, characterized in that: The second flip mirror unit includes a second power member whose flip axis extends along the Y-axis and a second flip mirror fixedly connected to the flip axis via a second clamp. The mirror surface of the second flip mirror faces the mirror surface of the first flip mirror, and the mirror surfaces of the two are intersecting. When the first flip mirror and the second flip mirror flip synchronously and at the same speed, the distance between the centers of the mirror surfaces of the two remains unchanged on the X-axis.

6. The laser welding galvanometer system with integrated hot and cold exchange flow channel according to claim 5, characterized in that: The second flip mirror has a planar reflective surface and includes a uniform thickness portion extending along the Y-axis, an upper fold portion that gradually thins from the upper part of the uniform thickness portion upwards, and a lower fold portion that gradually thins from the lower part of the uniform thickness portion downwards. The upper fold portion and the lower fold portion are symmetrically arranged about the Y-axis. The second clamp holds one end of the uniform thickness portion. Alternatively, the upper and lower edges of the back surface of the uniform thickness portion are inclined inwards, and the resulting inclined surfaces are flush with the inclined surfaces formed by the upper and lower fold portions. Alternatively, the edge thickness of the upper and lower ends of the upper and lower fold portions is 1 / 6 to 1 / 3 of the thickness of the uniform thickness portion. Alternatively, the two ends of the upper and lower fold portions are inclined inwards, wherein the inclination angle formed at the end closer to the second clamp is greater than the inclination angle formed at the end farther from the second clamp.

7. The laser welding galvanometer system with integrated hot and cold exchange flow channel according to claim 1, characterized in that: The dynamic focusing module includes a focusing mount, a lens mount slidably mounted on the focusing mount via a linear slide rail, a focusing lens mounted on the lens mount with its axis parallel to the sliding direction of the lens mount, and a driver for driving the lens mount to reciprocate, wherein the center of the focusing lens is aligned with the center of the lens mount, and the line connecting their centers is parallel to the X-axis.

8. The laser welding galvanometer system with integrated hot and cold exchange flow channel according to claim 7, characterized in that: The driver includes a drive motor mounted on the focusing mount and extending along the Y-axis, a transmission rod for drivingly connecting the output shaft of the drive motor to the lens mount, wherein the transmission rod converts the circular motion of the output shaft into linear motion to drive the lens mount to slide up and down reciprocally along the length of the linear slide rail; and / or; the laser welding galvanometer system further includes a lifting adjustment component disposed within the base and capable of adjusting the lifting and lowering of the focusing mount along the Z-axis.

9. The laser welding galvanometer system with integrated hot and cold exchange flow channel according to claim 1, characterized in that: The mirror adjustment module includes an adjustment base and a planar mirror mounted on the adjustment base and capable of adjusting its tilt angle around the X-axis. Optical paths are formed on the Y-axis and Z-axis of the adjustment base, respectively, and the planar mirror is tilted in the coordinate system formed by the Y-axis and Z-axis.

10. The laser welding galvanometer system with integrated hot and cold exchange flow channel according to claim 9, characterized in that: The adjustment module base forms two optical path channels on the Y-axis: one facing the mirror of the first flip mirror unit, and the other forming a viewing window through a right-angle connector; and / or, an optical lens is also provided between the plane mirror and the focusing lens, close to the plane mirror, wherein the focusing lens is a concave lens with concave upper and lower surfaces, the optical lens is a convex lens with convex upper and lower surfaces, and the focusing lens, the convex lens, and the plane mirror are arranged with their centers overlapping from top to bottom.

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