Screen post laser welding machine

Abstract

The present application relates to the field of screen door column processing, and provides a screen door column laser welding machine, which comprises a combination of a multi-axis servo module and an L-shaped cantilever to form an open structure instead of a closed structure of a gantry frame; the blocking problem caused by the gantry frame miniaturization welding to the screen door frame feeding of the screen door column is solved, and the technical problem of the L-shaped cantilever not being as stable and balanced as the gantry frame when replacing the gantry frame is solved through the special structure after optimization. The advantages are that the overall structure is stable, the overall structure will not shake during high-speed operation, the work efficiency is high, the structure is compact, the volume is relatively small, the occupied space is less, and the space is not wasted, the frame is made of steel structure and industrial aluminum profile, so that the static part of the equipment is more stable, and the dynamic part is lighter and faster.

Description

Technical Field

[0001] This invention relates to the field of screen window welding processing, and in particular to a laser welding machine for screen window center posts. Background Technology

[0002] Screen windows and their matching center posts and guardrails are generally processed using laser seamless welding technology, which is simpler, more efficient, and more aesthetically pleasing and robust than the traditional screw splicing method. Currently, the processing steps for seamless screen windows are generally as follows: first, the four corners of each frame of the screen window are welded using a corner laser welding machine to form the screen frame; then, the center posts and guardrails are welded. For example, when manufacturing three-sliding or two-sliding screen windows, it is necessary to add welded center posts and guardrails to the screen frame. Currently, the welding methods mainly involve handheld laser welding or using a general-purpose platform laser welding machine with a positioning ruler. However, due to the many non-standard dimensional parameters of screen windows, welders spend most of their time on positioning the center posts and flipping the workpiece, resulting in cumbersome and inefficient welding operations, and the screen window dimensions are prone to deviation. If existing laser welding machines are used for welding operations, the laser welding head is often mounted on a movable gantry frame, allowing the laser welding head to move and weld the center posts and guardrails. However, when this structure is applied to screen frames where only the central pillar of the screen needs to be welded after the frame has been welded, the gantry frame, with its enclosed space formed by gantry pillars on both sides, obstructs the feeding of the screen frame. Specifically, it's inconvenient to feed the screen frame from one side of the gantry frame to the welding fixing device after the four edges have been welded; the gantry frame must be moved away from the welding fixing device. This gantry structure is detrimental to improving production efficiency. Furthermore, to avoid obstructing feeding, the length of the machine frame must be extended, allowing the gantry frame to avoid the fixing area of ​​the screen frame during resetting. This increases the stroke of the gantry frame, leading to a longer time to reach the welding position at the same speed, further hindering work efficiency. Additionally, the initial positioning becomes more difficult, and the machine frame material and size increase, resulting in higher production and operating costs, which is not energy-efficient or environmentally friendly, and reduces the competitiveness of the screens. Summary of the Invention

[0003] This invention overcomes the aforementioned technical problems existing in the current laser welding technology for window screen pillars, and provides a window screen pillar laser welding machine with higher performance in various aspects. The technical solution adopted is as follows:

[0004] A laser welding machine for the central pillar of a window screen includes a steel structure frame, a laser welding device, a multi-axis servo module, and a window screen frame clamping mechanism.

[0005] The multi-axis servo module is mounted on the steel structure frame and is used to drive the laser welding device to perform multi-degree-of-freedom movements on the steel structure frame;

[0006] The laser welding device includes a laser welding head, which is mounted on a multi-axis servo module and is used for automatic welding of screen window frames.

[0007] The screen frame clamping mechanism is located on the top of the steel structure frame and is used to fix the screen frame.

[0008] The multi-axis servo module also includes an L-shaped cantilever for supporting the movement of the laser welding head above the steel structure frame. The L-shaped cantilever is mounted on the steel structure frame. The vertical arm of the L-shaped cantilever is slidably mounted on the steel structure frame and is located at the rear of the steel structure frame. The horizontal arm of the L-shaped cantilever is horizontally mounted above the steel structure frame in a front-to-back direction.

[0009] The L-shaped cantilever is provided with a cantilever verticality adjustment assembly between the horizontal arm and the vertical arm. The cantilever verticality adjustment assembly includes an XY axis verticality adjustment auxiliary vertical arm, an XY axis verticality adjustment support, and an XY axis verticality adjustment component.

[0010] The vertical arm of the XY axis verticality adjustment auxiliary arm is located on the side near the intersection of the horizontal and vertical arms of the L-shaped cantilever. The length of the vertical arm of the XY axis verticality adjustment auxiliary arm is shorter than that of the vertical arm of the L-shaped cantilever. The upper end of the vertical arm of the XY axis verticality adjustment auxiliary arm rests on the lower side of the horizontal arm of the L-shaped cantilever. The lower end of the vertical arm of the XY axis verticality adjustment auxiliary arm is located on the XY axis verticality adjustment bracket. One side of the XY axis verticality adjustment bracket is located on the XY axis verticality adjustment component.

[0011] There are two XY axis verticality adjustment components, one on the left and one on the right, distributed on the vertical arm of the L-shaped cantilever. The vertical arm of the L-shaped cantilever is provided with a verticality adjustment slot for the XY axis verticality adjustment component to slide. The XY axis verticality adjustment component is provided with a verticality adjustment slider that matches the verticality adjustment slot. The verticality adjustment slider is slidably mounted on the verticality adjustment slot and is provided with a locking component that locks the XY axis verticality adjustment component on the vertical arm of the L-shaped cantilever.

[0012] Furthermore, the locking assembly includes two locking screws, and the XY axis perpendicularity adjustment component is provided with locking holes that match the threads of the two locking screws. The locking holes are distributed on the upper and lower parts of the XY axis perpendicularity adjustment component.

[0013] Furthermore, the L-shaped cantilever has auxiliary cross arms on both the left and right sides of the downward-facing cross arm to strengthen the cross arm.

[0014] Furthermore, the multi-axis servo module is a five-axis servo module; the five-axis servo module structure includes an XYZ three-axis servo module and an AC servo rotary mechanism;

[0015] The XYZ three-axis servo module is mounted on the steel structure frame and is used to adjust the three-dimensional spatial position of the AC servo rotary mechanism above the steel structure frame.

[0016] The AC servo rotation mechanism is set on the XYZ three-axis servo module, located above the screen frame clamping mechanism, and is used to adjust the horizontal and vertical rotation angles of the laser welding head.

[0017] The laser welding head is mounted on the AC servo rotating mechanism, above the screen frame clamping mechanism, and is used to weld the interconnected screen frames; the laser welding head is connected to the laser via an optical fiber.

[0018] The XYZ three-axis servo module includes an X-axis servo module, a Y-axis servo module, and a Z-axis servo module;

[0019] The X-axis servo module can be horizontally mounted on the rear side of the steel structure frame, allowing it to move left and right.

[0020] The vertical arm of the L-shaped cantilever is mounted on the X-axis servo module;

[0021] The Y-axis servo module can drive the Z-axis servo module to slide back and forth on the cross arm of the L-shaped cantilever.

[0022] The Z-axis servo module can drive the AC servo rotation mechanism to slide up and down on the Y-axis servo module.

[0023] The AC servo rotation mechanism includes a C-axis servo mechanism and an A-axis servo mechanism. The C-axis servo mechanism is located at the lower end of the Z-axis servo module, and the A-axis servo mechanism is located on the C-axis servo mechanism.

[0024] Furthermore, the X-axis servo module includes an X-axis secondary slide rail, an X-axis secondary slider, an X-axis slider, X-axis left and right sliding components, and an X-axis servo motor; among which,

[0025] The X-axis auxiliary slide rail is located on the rear side of the top of the steel structure frame;

[0026] The X-axis left and right sliding assembly is mounted on the X-axis secondary slide rail. The X-axis left and right sliding assembly has a built-in double guide rail and lead screw assembly.

[0027] The X-axis servo motor is located at the left end of the X-axis left and right sliding assembly, and its output shaft is connected to one end of the lead screw in the lead screw assembly; the X-axis slider is linked to the lead screw nut in the lead screw assembly.

[0028] The XY axis verticality adjustment bracket is fixed on both the X-axis auxiliary slider and the X-axis slider, forming a stable sliding mechanism with three guide rails.

[0029] Furthermore, the screen frame clamping mechanism includes a workpiece left side positioning component, a workpiece rear side positioning component, a workpiece front side clamping component, and a workpiece center column positioning assembly;

[0030] The workpiece center column positioning assembly includes a left positioning servo module, a right positioning servo module, a left support bar, a right support bar, a left positioning fixture, and a right positioning fixture. The left and right positioning servo modules are arranged side-by-side on the top of the steel frame. Both modules include a servo motor and a lead screw mechanism. Positioning fixture sliders are mounted on the lead screw nut of each lead screw mechanism. The servo motor is connected to the lead screw in the lead screw mechanism. The left support bar is mounted on the positioning fixture slider in the left positioning servo module, and the right support bar is mounted on the positioning fixture slider in the right positioning servo module. The left positioning fixture is located in the middle of the left support bar, and the right positioning fixture is located in the middle of the right support bar.

[0031] The workpiece left-side positioning component includes at least two L-shaped right-angle positioning components, which are located on the top left side of the steel structure frame.

[0032] The workpiece rear positioning component includes a rear positioning block that spans horizontally across the rear ends of the left and right support bars of the workpiece central column. The rear positioning block has a positioning groove for accommodating the workpiece frame, and the front side of the positioning groove has a welding notch for accommodating the rear end of the workpiece central column. The rear side of the rear positioning block has a limiting adjustment clamping component for pressing the workpiece frame within the positioning groove. The workpiece front clamping component includes a workpiece front push rod, a slidable positioning block, and a workpiece front push head. The slidable positioning block is slidably mounted on the left and right support bars of the workpiece central column, and the slidable positioning block has a positioning block threaded locking component for locking the slidable positioning block on the left and right support bars of the workpiece central column.

[0033] The front push rod of the workpiece is rotatably mounted on the sliding positioning block through a threaded hole in the main body of the sliding positioning block. The end of the front push rod facing the workpiece is opposite to the welding notch in a gap. The front pressure head of the workpiece is located at the end of the front push rod facing the workpiece. The end of the front push rod away from the workpiece is connected to the linear motion driver.

[0034] Furthermore, there are four right-angle positioning components, which are mounted on the top left side of the steel structure frame and can be flipped left and right via a pivot.

[0035] Furthermore, a protective rail welding positioning guide is provided on the top right side of the steel structure frame; a protective rail welding positioning fixture clamps the outer protective rail of the screen window on the protective rail welding positioning guide.

[0036] Furthermore, the right-angle positioning component is equipped with a workpiece detection sensor.

[0037] Furthermore, the steel structure frame is equipped with mutually facing safety light curtains on both the left and right sides of the front side; a control button box is located on the right side of the steel structure frame; a frame sheet metal plate is located on the outside of the steel structure frame; an electrical control board for controlling the operation of each moving part and a laser for providing high-energy laser to the laser welding head are located inside the steel structure frame; the steel structure frame is also equipped with a human-machine interface cantilever control box, a wireless scanner, and a foot switch. The wireless scanner is wirelessly or electrically connected to the cantilever control box, and the foot switch is wirelessly or electrically connected to the cantilever control box.

[0038] The aforementioned five-axis servo module and other moving parts are preferably made of lightweight aluminum alloy, which reduces the weight of the product while ensuring strength, and also reduces energy consumption during movement, thus achieving energy saving.

[0039] The working principle is as follows: The open L-shaped cantilever facilitates the loading of the screen frame. After the screen frame is loaded into place, a wireless scanner is used to scan the QR code to obtain the screen data. The equipment control system calculates the real-time data of the left and right positioning fixture positions based on the screen data obtained from the scan, that is, the X-axis position of the welding joint. The inner left side of the screen frame and the inner side of the frame serve as positioning references and do not move. The Y-axis position of the outer welding joint is calculated based on the width data of the screen. The four welding joints of the screen's central column are obtained by using a fixed reference frame teaching programming method. There are four independent and fixed welding postures, that is, the corresponding C-axis and A-axis angles and the relative movement trajectories of the X-axis, Y-axis and Z-axis in the five-axis servo module during welding.

[0040] When different screen window data is scanned, the equipment control system will automatically calculate the X and Y axis displacement required for the welding position of the non-standard size frame relative to the four welding positions of the fixed size reference frame, so as to realize the automatic positioning and automatic planning of welding path of the non-standard screen window of this equipment. In order to adapt to the manual feeding cycle, the left and right CNC positioning fixtures are moved by pressing the positioning button. When welding is performed automatically, the analog signal module integrated in the motion controller converts the analog signal input on the touch screen into a digital signal and transmits it to the laser. The laser emits the corresponding laser source energy according to the received digital signal, which is transmitted to the laser welding head through the optical fiber, and then collimated and focused by the internal optical lens of the laser welding head to finally complete the photothermal conversion process.

[0041] The motion controller sends pulse signals to the driver, and the driver then provides corresponding current to each servo motor in the five-axis servo module according to the number of pulses received. The servo motors also provide real-time feedback of position information to the driver during their movement to achieve precise speed and position control. The servo mechanism drives the laser welding head to align with the weld seam and maintain the welding focal length, moving at a uniform speed in all directions. Depending on the welding process requirements, automatic wire filling or no wire filling can be selected during the welding process to achieve uniform and aesthetically pleasing weld formation. The laser emission, automatic wire filling, and servo motion control of the linear module are controlled by the corresponding control program.

[0042] As can be seen from the above, compared with the prior art, the present invention also has the following advantages:

[0043] (1) The overall structure is stable and will not shake when running at high speed, resulting in high work efficiency; the structure is compact, resulting in a relatively small volume and less space occupied, thus avoiding space waste; the frame is made of steel structure and industrial aluminum profile to achieve the effect of more stable static parts and lighter and faster dynamic parts.

[0044] (2) The front and rear positioning fixtures and the guardrail welding positioning fixture adopt a combined pressing method, which makes the structure more compact, flexible and adjustable, and the workpiece can be quickly replaced. The fixture is highly adaptable to non-standard workpiece sizes and the workpiece clamping operation is convenient.

[0045] (3) The Y-axis adopts a large cantilever structure, and the Y-axis support adopts a combination of aluminum profile columns from the aluminum plate processing industry. The aluminum profile columns are extended on the side of the frame, and an additional linear guide rail is added to the bottom of the XY axis verticality adjustment support. This structure makes the large-span L-shaped cantilever structure more stable, making the laser welding head run more stably and faster, overcoming the stability problem caused by not using a gantry structure. In terms of manual loading and unloading, the cantilever structure is also more convenient and faster for side loading than the traditional gantry moving beam structure.

[0046] (4) It can not only support laser welding of three-push and two-push screens, but also be compatible with laser welding of screen guardrails;

[0047] (5) Servo motion and welding process control combined with its control program control, in view of the non-standard characteristics of screen windows and their guardrail screen windows, the control program adds a barcode scanning function, which can obtain screen window data more quickly, and also takes into account the functions of automatic positioning and automatic planning of welding paths for non-standard screen windows, as well as the storage function of path and welding recipe, making the equipment operation simpler and the screen window switching faster. It has a smooth automatic wire filling effect (each weld bead can be freely selected whether to fill with wire), welding power can be slowly increased and decreased, etc. The welding process adjustment is simple and clear, and the welding process parameters, motion path and standby position can be packaged and stored at the same time, making the screen window switching very fast. Attached Figure Description

[0048] The accompanying drawings are provided to further illustrate the invention and are used together with the embodiments of the invention to explain the invention. They do not constitute a limitation of the invention. In the drawings:

[0049] Figure 1 This is a perspective view of the laser welding machine for the central column of the screen window in this invention;

[0050] Figure 2 for Figure 1 A stereoscopic view from another perspective;

[0051] Figure 3 for Figure 2 Enlarged view of point B;

[0052] Figure 4 for Figure 2 Enlarged view of point A;

[0053] Figure 5 for Figure 2 Exploded view;

[0054] Figure 6 This is a partial exploded view of the workpiece center column positioning assembly;

[0055] Figure 7 A 3D view of an L-shaped cantilever;

[0056] Figure 8 An exploded view of the X-axis servo module;

[0057] Figure 9 This is a block diagram of the control system for a laser welding machine for the central column of a window screen.

[0058] Main reference numerals: 1. Steel frame; 2. Sheet metal plate of the frame; 3. X-axis servo module; 4. Y-axis servo module; 5. Z-axis servo module; 6. C-axis servo mechanism; 7. A-axis servo mechanism; 8. Laser welding head; 9. Left positioning servo module of the screen window center column; 10. Right positioning servo module of the screen window center column; 12. Left positioning fixture of the screen window center column; 13. Right positioning fixture of the screen window center column; 14. Welding positioning fixture for the guardrail; 15. Rear positioning block; 16. Laser; 17. Safety light curtain; 18. Foot switch; 19. Control button box; 20. Cantilever control box; 21. Wireless scanner; 22. Workpiece detection sensor; 23. Right-angle positioning component; 24. XY-axis verticality adjustment auxiliary vertical arm; 25. XY-axis verticality adjustment bracket; 26. XY-axis verticality adjustment component. Locking hole 261, verticality adjustment slot 27, verticality adjustment slider 28, workpiece front push rod 291, sliding positioning block 292, workpiece front push head 293, positioning block threaded locking part 294, workpiece center column left support bar 30, workpiece center column right support bar 31, guardrail welding positioning guide rail 32, L-shaped cantilever Y1, horizontal arm Y2, vertical arm Y3, secondary horizontal arm Y4, electric control board 45, positioning groove 151, welding notch 153, limit adjustment clamping part 152, X-axis secondary slide rail 311, X-axis secondary slider 312, X-axis slider 313, X-axis servo motor 314, X-axis left and right sliding assembly 316, X-axis slide rail 317; screen window frame G1, screen window outer layer guardrail G2, screen window center column G3. Detailed Implementation

[0059] The present invention and its beneficial technical effects will be further described in detail below with reference to the accompanying drawings and preferred embodiments. In particular, for ease of description of the positional relationships between the components, the relative positions of the components in front, back, left, right, top, and bottom are... Figure 1 The displayed orientation is a reference position. The "workpiece" mentioned is a broader concept than "screen frame." In specific embodiments, "screen frame" mainly refers to the screen side frame and screen center post that require laser welding.

[0060] like Figures 1-8 As shown, a preferred embodiment of the present invention provides a laser welding machine for the central column of a window screen, comprising a steel structure frame 1, a laser welding device, a multi-axis servo module, and a window screen frame clamping mechanism, wherein...

[0061] A multi-axis servo module is mounted on the steel structure frame 1 and is used to drive the laser welding device to perform multi-degree-of-freedom movements on the steel structure frame 1.

[0062] The laser welding device includes a laser welding head 8, which is mounted on a multi-axis servo module and is used for automatic welding of screen window frames.

[0063] The screen frame clamping mechanism is located at the top of the steel structure frame 1 and is used to fix the screen frame.

[0064] The multi-axis servo module also includes an L-shaped cantilever Y1 for supporting the laser welding head 8 to move above the steel structure frame 1. The L-shaped cantilever Y1 is mounted on the steel structure frame 1. The vertical arm Y3 of the L-shaped cantilever Y1 is slidably mounted on the steel structure frame 1, and the vertical arm Y3 of the L-shaped cantilever Y1 is located on the rear side of the steel structure frame 1. The horizontal arm Y2 of the L-shaped cantilever Y1 is horizontally mounted above the steel structure frame 1 in a front-back direction.

[0065] The horizontal arm Y2 and the vertical arm Y3 of the L-shaped cantilever Y1 are provided with a cantilever verticality adjustment assembly, which includes an XY axis verticality adjustment auxiliary vertical arm 24, an XY axis verticality adjustment support 25, and an XY axis verticality adjustment component 26.

[0066] The XY-axis verticality adjustment auxiliary vertical arm 24 is located on the side near the intersection of the horizontal arm Y2 and the vertical arm Y3 of the L-shaped cantilever Y1. The length of the XY-axis verticality adjustment auxiliary vertical arm 24 is less than that of the vertical arm Y3 of the L-shaped cantilever Y1. The upper end of the XY-axis verticality adjustment auxiliary vertical arm 24 rests on the lower side of the horizontal arm Y2 of the L-shaped cantilever Y1. The lower end of the XY-axis verticality adjustment auxiliary vertical arm 24 is located on the XY-axis verticality adjustment support 25. One side of the XY-axis verticality adjustment support 25 is located on the XY-axis verticality adjustment component 26.

[0067] Two XY axis verticality adjusting components 26 are arranged on the vertical arm Y3 of the L-shaped cantilever Y1, one on the left and one on the right. The vertical arm Y3 of the L-shaped cantilever Y1 is provided with a verticality adjusting groove 27 for sliding of the XY axis verticality adjusting component 26. The XY axis verticality adjusting component 26 is provided with a verticality adjusting slider 28 that slides and matches the verticality adjusting groove 27. The verticality adjusting slider 28 is slidably arranged on the verticality adjusting groove 27. The XY axis verticality adjusting component 26 is provided with a locking component that locks the XY axis verticality adjusting component 26 on the vertical arm Y3 of the L-shaped cantilever Y1.

[0068] The vertical arm Y3 of the L-shaped cantilever Y1 uses the XY-axis verticality adjustment auxiliary vertical arm 24 as a fulcrum. Under the action of gravity, the vertical arm Y3 balances the horizontal arm Y2, keeping both ends of the horizontal arm Y2 balanced. Therefore, the XY-axis verticality adjustment auxiliary vertical arm 24 not only ensures the verticality of the horizontal arm Y2 but also maintains its balance. When the laser welding head 8 is moved and its position is changed by the multi-axis servo module, there will be no shaking that affects the welding, achieving a balance and stability effect close to that of a gantry frame. At the same time, it overcomes the technical problem of the workpiece not being blocked by the gantry frame's supports during feeding. In other words, the open L-shaped cantilever Y1 facilitates the loading of screen window frames.

[0069] Furthermore, the locking assembly includes two locking screws (not shown in the figure), and the XY axis perpendicularity adjustment component 26 is provided with locking holes 261 that match the threads of the two locking screws. The locking holes 261 are distributed on the upper and lower parts of the XY axis perpendicularity adjustment component 26.

[0070] Furthermore, on both the left and right sides of the downward-facing side of the cross arm Y2 of the L-shaped cantilever Y1, there are auxiliary cross arms Y4 to strengthen the cross arm Y2. The auxiliary cross arms Y4 are all made of aluminum alloy, which, while strengthening the load-bearing capacity of the cross arm Y2 of the L-shaped cantilever Y1, also reduces weight, ensuring the stability of the cross arm Y2 of the L-shaped cantilever Y1. The L-shaped cantilever Y1, the XY axis verticality adjustment auxiliary vertical arm 24, and the auxiliary cross arms Y4 are preferably made of lightweight aluminum alloy, reducing the product's weight while ensuring strength, and also reducing energy consumption during operation, achieving energy-saving effects.

[0071] Furthermore, the multi-axis servo module is a five-axis servo module; the five-axis servo module structure includes an XYZ three-axis servo module and an AC servo rotary mechanism;

[0072] The XYZ three-axis servo module is mounted on the steel structure frame 1 and is used to adjust the three-dimensional spatial position of the AC servo rotation mechanism above the steel structure frame 1.

[0073] The AC servo rotation mechanism is set on the XYZ three-axis servo module, located above the screen frame clamping mechanism, and is used to adjust the rotation angle of the laser welding head 8 in the horizontal and vertical directions.

[0074] The laser welding head 8 is mounted on the AC servo rotating mechanism, located above the screen frame clamping mechanism, and is used to weld the interconnected screen frames; the laser welding head 8 is connected to the laser via an optical fiber.

[0075] The XYZ three-axis servo module includes X-axis servo module 3, Y-axis servo module 4, and Z-axis servo module 5;

[0076] The X-axis servo module 3 can be horizontally mounted on the rear side of the steel structure frame 1, and can be moved left and right.

[0077] The vertical arm Y3 of the L-shaped cantilever Y1 is set on the X-axis servo module 3;

[0078] The Y-axis servo module 4 can drive the Z-axis servo module 5 to slide back and forth on the horizontal arm Y2 of the L-shaped cantilever Y1.

[0079] Z-axis servo module 5 can drive AC servo rotation mechanism to slide up and down on Y-axis servo module 4.

[0080] The AC servo rotation mechanism includes a C-axis servo mechanism 6 and an A-axis servo mechanism 7. The C-axis servo mechanism 6 is located at the lower end of the Z-axis servo module 5, and the A-axis servo mechanism 7 is located on the C-axis servo mechanism 6.

[0081] After the above measures, the laser welding head has a large degree of freedom. With the support of the XYZ three-axis servo module and AC servo rotation mechanism in the five-axis servo module, the laser welding head has five motion dimensions, is compatible with multi-dimensional arc welding functions, increases the welding range, can weld complex irregular welds, has a high cost-performance ratio, and is flexible in production and supporting applications.

[0082] Furthermore, the X-axis servo module 3 includes an X-axis secondary slide rail 311, an X-axis secondary slider 312, an X-axis slider 313, an X-axis left and right sliding assembly 316, and an X-axis servo motor 314; wherein,

[0083] X-axis auxiliary slide rail 311 is installed on the rear side of the top of the steel structure frame 1;

[0084] The X-axis left and right sliding assembly 316 is mounted on the X-axis secondary slide rail 311. The X-axis left and right sliding assembly 316 has a built-in double guide rail and lead screw assembly (not shown in the figure).

[0085] X-axis servo motor 314 is located at the left end of the X-axis left and right sliding assembly, and its output shaft is connected to one end of the lead screw in the lead screw assembly; X-axis slider 313 is linked to the lead screw nut in the lead screw assembly.

[0086] The XY axis verticality adjustment bracket 25 is simultaneously fixed on the X-axis auxiliary slider 312 and the X-axis slider 313, forming a stable sliding mechanism with three guide rails.

[0087] The stable sliding mechanism of the three guide rails ensures that the five-axis servo module maintains a stable motion state, which in turn ensures that the laser welding head remains stable when working in a moving state, thus ensuring the quality of laser welding.

[0088] Furthermore, the screen frame clamping mechanism includes a workpiece left side positioning component, a workpiece rear side positioning component, a workpiece front side clamping component, and a workpiece center column positioning assembly;

[0089] The workpiece center column positioning assembly includes a left positioning servo module 9, a right positioning servo module 10, a left support bar 30, a right support bar 31, a left positioning fixture 12, and a right positioning fixture 13. The left and right positioning servo modules 9 and 10 are arranged side-by-side on the top of the steel frame 1 in a left-right orientation. Both the left and right positioning servo modules 9 and 10 include servo motors and lead screws. The structure includes a lead screw nut with a positioning fixture slider; a servo motor is connected to the lead screw in the lead screw mechanism; the left support bar 30 of the workpiece center column is set on the positioning fixture slider in the left positioning servo module 9 of the screen window center column, and the right support bar 31 of the workpiece center column is set on the positioning fixture slider in the right positioning servo module 10 of the screen window center column; the left positioning fixture 12 of the screen window center column is set in the middle of the left support bar 30 of the workpiece center column, and the right positioning fixture 13 of the screen window center column is set in the middle of the right support bar 31 of the workpiece center column;

[0090] The workpiece left-side positioning component includes at least two L-shaped right-angle positioning components 23, which are located on the top left side of the steel structure frame 1.

[0091] The workpiece rear positioning component includes a rear positioning block 15 that spans horizontally across the rear ends of the left support bar 30 and the right support bar 31 of the workpiece central column. The rear positioning block 15 is provided with a positioning groove 151 for accommodating the workpiece frame. The front side of the positioning groove 151 is provided with a welding notch 153 for accommodating the rear end of the workpiece central column. The rear side of the rear positioning block 15 is provided with a limiting adjustment clamping component 152 for clamping the workpiece frame inside the positioning groove 151. The limiting adjustment clamping component 152 is preferably a bolt.

[0092] The front clamping component of the workpiece includes a front push rod 291, a slidable positioning block 292, and a front push head 293. The slidable positioning block 292 is slidably mounted on the left support bar 30 and the right support bar 31 of the workpiece center column. The slidable positioning block 292 is provided with a positioning block threaded locking component 294 that locks the slidable positioning block 292 on the left support bar 30 and the right support bar 31 of the workpiece center column.

[0093] The front push rod 291 of the workpiece passes through a threaded hole in the main body of the sliding positioning block 292 and is rotatably mounted on the sliding positioning block 292. The end of the front push rod 291 facing the workpiece is opposite to the welding notch 153. The front pressing head 293 of the workpiece is located at the end of the front push rod 291 facing the workpiece. The end of the front push rod 291 away from the workpiece is connected to the linear motion driver. Further, there are four right-angle positioning parts 23, which are mounted on the top left side of the steel structure frame 1 and can be flipped left and right by a rotating shaft. The linear motion driver is preferably a cylinder. The sliding positioning block 292 can slide freely on the left support bar 30 or the right support bar 31 of the workpiece center column as the front push rod 291 extends and retracts. Therefore, under the guidance and support of the sliding positioning block 292, the front push rod 291 can be of a longer length to accommodate screen frames of different widths. Therefore, the combined pressing method of front and rear positioning fixtures and guardrail welding positioning fixtures is more compact, flexible, and quick to change. The fixtures are highly adaptable to non-standard workpiece sizes, and the workpiece clamping operation is convenient.

[0094] The clamping action of the workpiece front push rod 291 can be controlled automatically or manually. In automatic control mode, the cylinder can be driven by controlling the solenoid valve, which connects the cylinder to the high-pressure air source. When clamping the workpiece manually, simply operate the workpiece front push rod 291 to clamp the side of the workpiece, and then lock the sliding positioning block 292 onto the left support bar 30 or right support bar 31 of the workpiece center column using the positioning block threaded locking part 294. This completes the manual clamping operation. The workpiece front push head 293 is generally made of rubber and is an elastic pressure head.

[0095] Furthermore, to facilitate the welding of the outer protective railing G2 of the screen window, a welding positioning guide rail 32 is also provided on the top right side of the steel structure frame 1; a welding positioning fixture 14 is clamped and fixed on the welding positioning guide rail 32 to hold and fix the outer protective railing G2 of the screen window. The outer protective railing G2 of the screen window, as a protective layer of the screen window, is generally welded to the screen window frame G1 to protect the screen window.

[0096] Furthermore, in order to facilitate the determination of whether the welding workpiece is in place, a workpiece detection sensor 22 is provided on the right-angle positioning component 23.

[0097] Furthermore, for the safety and operation of the operators, safety light curtains 17 that shoot towards each other are provided on both the left and right sides of the front of the steel structure frame 1; a control button box 19 is provided on the right side of the steel structure frame 1; a frame sheet metal plate 2 is provided on the outside of the steel structure frame 1; an electrical control board 45 for controlling the operation of each moving part and a laser 16 for providing high-energy laser to the laser welding head 8 are provided inside the steel structure frame 1; the steel structure frame 1 is also provided with a human-machine interactive cantilever control box 20, a wireless scanning gun 21, and a foot switch 18. The wireless scanning gun 21 is wirelessly or electrically connected to the cantilever control box 20, and the foot switch 18 is wirelessly or electrically connected to the cantilever control box 20.

[0098] When safety light curtain 17 detects someone moving outside the safe distance, the machine will not perform welding work. The laser welding machine for the central column of the screen window requires its supporting control system to achieve automated welding. The cantilever control box is used for human-machine interaction, such as a touch screen; the control button box is used for manual operation, such as emergency stop and start.

[0099] Laser welding machines for window screen pillars require a matching control system to achieve automated welding, such as... Figure 9 As shown, the aforementioned control system includes a human-machine interface (HMI), a motion controller, a remote I / O control module for remote control, and a 7-axis multi-drive servo drive. The HMI for human-machine interaction is electrically connected to the motion controller that controls the movement of the screen window center column laser welding machine via an Ethernet bus, and the motion controller and the 7-axis multi-drive servo drive are electrically connected via an ECAT bus. The HMI is preferably a touchscreen, which is mounted on the cantilever control box 20. The 7-axis multi-drive servo drive is electrically connected to the corresponding servo motors in the X-axis servo module 3, Y-axis servo module 4, Z-axis servo module 5, C-axis servo mechanism 6, A-axis servo mechanism 7, screen window center column left positioning servo module 9, and screen window center column right positioning servo module 10. Figure 9 The X-axis motor corresponds to the X-axis servo motor used in X-axis servo module 3; the Y-axis motor corresponds to the Y-axis servo motor used in Y-axis servo module 4; the Z-axis motor corresponds to the Z-axis servo motor used in Z-axis servo module 5; the C-axis motor corresponds to the C-axis servo motor used in C-axis servo mechanism 6; and the A-axis motor corresponds to the A-axis servo motor used in A-axis servo mechanism 7. Similarly, Figure 9 The left positioning motor in the middle corresponds to the left positioning servo motor of the screen window center column used in the left positioning servo module 9, and the right positioning motor corresponds to the right positioning servo motor of the screen window center column used in the right positioning servo module 10.

[0100] The operation method of this embodiment is as follows:

[0101] The overall process steps are: scan the code to import the screen window data → automatic fixture positioning → workpiece clamping cylinder clamping → five-axis collaborative welding → return to standby position. The specific operation process is as follows: First, use the wireless scanner 21 to scan the QR code on the work order. The screen window data in the QR code includes the inner length and width dimensions of the frame, the position dimensions of the screen window center post G3, and the number of screen windows, which is automatically imported into the control system. Before placing the screen window frame G1, press the positioning button on the cantilever control box 20. For welding the guardrail workpiece, press the button on the control button box 19 nearby. The left positioning fixture 12 and the right positioning fixture 13 of the screen window center post automatically move to the corresponding positions of the screen window center post G3 according to the screen window data. Place the screen window frame G1 or the guardrail workpiece. The frame parts and center post of the guardrail workpiece are placed onto the fixture. Stepping on the foot switch causes the control cylinders of the left and right positioning fixtures 12 and 13 of the screen center post to clamp the screen center post G3. Then, pressing the automatic start button activates the five-axis servo module, which drives the laser welding head to automatically complete laser welding of all seams on the screen and its associated guardrail screen center post G3. If the screen welding process requires wire filling, an automatic wire filling mechanism can be selected according to the process requirements. After welding, the left and right servo mechanisms automatically reset and move to the set standby position for easy workpiece loading and unloading. The actual operation uses a one-button system, which is simple and quick.

[0102] For standard screen window center post welding, there are pre-stored recipes. When using them, simply press "Read" on the touchscreen and then press "Confirm" on the reference frame. For newly added screen window center post welding, a teach-in programming method can be used. Simply align the laser welding head with the welding start and end positions and press "Record" once to record the welding path. This allows for rapid programming. After programming, select the save location on the recipe management page and press "Save". This path will then be stored and managed, and can be retrieved at any time for use on the corresponding screen window.

[0103] The above description omits content that is conventionally used in the prior art, such as the multi-axis servo module, which has been disclosed in the applicant's other patent applications for laser welding screen devices prior to this application date; and related transmission connection components and machining processes such as lead screw assemblies, cylinder drives, and motor rotation drives, as well as lasers and laser welding heads, which are commercially available finished products. For the sake of brevity, these will not be elaborated further. Other undisclosed processing techniques and parts can be handled using conventional techniques found in the prior art.

[0104] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. However, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A laser welding machine for the central column of a window screen, comprising a steel structure frame (1), a laser welding device, a multi-axis servo module, and a window screen frame clamping mechanism, wherein, The multi-axis servo module is mounted on the steel structure frame (1) and is used to drive the laser welding device to perform multi-degree-of-freedom motion on the steel structure frame (1); The laser welding device includes a laser welding head (8), which is mounted on a multi-axis servo module and is used for automatic welding of the screen frame. The screen frame clamping mechanism is set on the top of the steel structure frame (1) to fix the screen frame; Its features are: The multi-axis servo module also includes an L-shaped cantilever (Y1) for supporting the laser welding head (8) to move above the steel structure frame (1). The L-shaped cantilever (Y1) is set on the steel structure frame (1). The vertical arm (Y3) of the L-shaped cantilever (Y1) is slidably set on the steel structure frame (1) and the vertical arm (Y3) of the L-shaped cantilever (Y1) is located on the rear side of the steel structure frame (1). The horizontal arm (Y2) of the L-shaped cantilever (Y1) is set horizontally above the steel structure frame (1) in a front-back direction. The horizontal arm (Y2) and vertical arm (Y3) of the L-shaped cantilever (Y1) are provided with a cantilever verticality adjustment assembly, which includes an XY axis verticality adjustment sub-vertical arm (24), an XY axis verticality adjustment support (25), and an XY axis verticality adjustment component (26). The XY axis verticality adjustment auxiliary vertical arm (24) is located on the side where the horizontal arm (Y2) and vertical arm (Y3) of the L-shaped cantilever (Y1) intersect. The length of the XY axis verticality adjustment auxiliary vertical arm (24) is less than that of the vertical arm (Y3) of the L-shaped cantilever (Y1). The upper end of the XY axis verticality adjustment auxiliary vertical arm (24) rests on the lower side of the horizontal arm (Y2) of the L-shaped cantilever (Y1). The lower end of the XY axis verticality adjustment auxiliary vertical arm (24) is located on the XY axis verticality adjustment bracket (25). One side of the XY axis verticality adjustment bracket (25) is located on the XY axis verticality adjustment component (26). There are two XY axis verticality adjustment components (26), one on the left and one on the right, on the vertical arm (Y3) of the L-shaped cantilever (Y1); the vertical arm (Y3) of the L-shaped cantilever (Y1) is provided with a verticality adjustment slot (27) for sliding of the XY axis verticality adjustment component (26); the XY axis verticality adjustment component (26) is provided with a verticality adjustment slider (28) that slides and matches the verticality adjustment slot (27); the verticality adjustment slider (28) is slidably provided on the verticality adjustment slot (27); the XY axis verticality adjustment component (26) is provided with a locking component that locks the XY axis verticality adjustment component (26) on the vertical arm (Y3) of the L-shaped cantilever (Y1); The multi-axis servo module is a five-axis servo module; the five-axis servo module structure includes an XYZ three-axis servo module and an AC servo rotation mechanism; The XYZ three-axis servo module is set on the steel structure frame (1) and is used to adjust the three-dimensional spatial position of the AC servo rotation mechanism above the steel structure frame (1). The AC servo rotation mechanism is set on the XYZ three-axis servo module, above the screen frame clamping mechanism, and is used to adjust the rotation angle of the laser welding head (8) in the horizontal and vertical directions. The laser welding head (8) is set on the AC servo rotating mechanism, above the screen frame clamping mechanism, and is used to weld the interconnected screen frames. The XYZ three-axis servo module includes an X-axis servo module (3), a Y-axis servo module (4), and a Z-axis servo module (5). The X-axis servo module (3) is horizontally mounted on the rear side of the steel structure frame (1) and can be moved left and right. The vertical arm (Y3) of the L-shaped cantilever (Y1) is set on the X-axis servo module (3); The Y-axis servo module (4) can drive the Z-axis servo module (5) to slide back and forth on the horizontal arm (Y2) of the L-shaped cantilever (Y1); The Z-axis servo module (5) can drive the AC servo rotation mechanism to slide up and down on the Y-axis servo module (4); The AC servo rotation mechanism includes a C-axis servo mechanism (6) and an A-axis servo mechanism (7). The C-axis servo mechanism (6) is located at the lower end of the Z-axis servo module (5), and the A-axis servo mechanism (7) is located on the C-axis servo mechanism (6).

2. The laser welding machine for the central column of a window screen according to claim 1, characterized in that, The locking assembly includes two locking screws. The XY axis perpendicularity adjustment component (26) is provided with locking holes (261) that match the threads of the two locking screws. The locking holes (261) are distributed on the upper and lower parts of the XY axis perpendicularity adjustment component (26).

3. The laser welding machine for the central column of a window screen according to claim 1, characterized in that, The L-shaped cantilever (Y1) has auxiliary cross arms (Y4) on both the left and right sides of the downward-facing cross arm (Y2) of the cross arm (Y2).

4. The laser welding machine for the central column of a window screen according to claim 3, characterized in that, The X-axis servo module (3) includes an X-axis secondary slide rail (311), an X-axis secondary slider (312), an X-axis slider (313), an X-axis left and right sliding assembly (316), and an X-axis servo motor (314); wherein, The X-axis auxiliary slide rail (311) is located on the rear side of the top of the steel structure frame (1); The X-axis left and right sliding assembly (316) is set on the X-axis secondary slide rail (311), and the X-axis left and right sliding assembly (316) has a built-in double guide rail and lead screw assembly; The X-axis servo motor (314) is located at the left end of the X-axis left and right sliding assembly, and its output shaft is connected to one end of the lead screw in the lead screw assembly; the X-axis slider (313) is linked to the lead screw nut in the lead screw assembly. The XY axis verticality adjustment bracket (25) is fixed on both the X-axis auxiliary slider (312) and the X-axis slider (313) to form a stable sliding mechanism with three guide rails.

5. The laser welding machine for the central column of a screen window according to any one of claims 1 to 4, characterized in that, The screen frame clamping mechanism includes a workpiece left side positioning component, a workpiece rear side positioning component, a workpiece front side clamping component, and a workpiece center column positioning assembly; The workpiece center column positioning assembly includes a screen window center column left positioning servo module (9), a screen window center column right positioning servo module (10), a workpiece center column left support bar (30), a workpiece center column right support bar (31), a screen window center column left positioning fixture (12), and a screen window center column right positioning fixture (13); the screen window center column left positioning servo module (9) and the screen window center column right positioning servo module (10) are arranged side by side on the top of the steel structure frame (1) in a left-right direction; both the screen window center column left positioning servo module (9) and the screen window center column right positioning servo module (10) include servo motors and A lead screw mechanism; each lead screw nut of the lead screw mechanism is equipped with a positioning clamp slider; the servo motor is connected to the lead screw in the lead screw mechanism; the left support bar (30) of the workpiece center column is set on the positioning clamp slider in the left positioning servo module (9) of the screen window center column, and the right support bar (31) of the workpiece center column is set on the positioning clamp slider in the right positioning servo module (10) of the screen window center column; the left positioning clamp (12) of the screen window center column is set in the middle of the left support bar (30) of the workpiece center column, and the right positioning clamp (13) of the screen window center column is set in the middle of the right support bar (31) of the workpiece center column; The workpiece left-side positioning component includes at least two L-shaped right-angle positioning components (23), which are located on the top left side of the steel structure frame (1); The workpiece rear positioning component includes a rear positioning block (15) that spans the rear ends of the left support bar (30) and the right support bar (31) of the workpiece central column. The rear positioning block (15) is provided with a positioning groove (151) for accommodating the workpiece frame. The front side of the positioning groove (151) is provided with a welding notch (153) for accommodating the rear end of the workpiece central column. The rear side of the rear positioning block (15) is provided with a limiting adjustment clamping component (152) for clamping the workpiece frame inside the positioning groove (151). The front clamping component of the workpiece includes a front push rod (291), a slidable positioning block (292), and a front push head (293). The slidable positioning block (292) is slidably mounted on the left support bar (30) and the right support bar (31) of the workpiece center column. The slidable positioning block (292) is provided with a positioning block threaded locking component (294) that locks the slidable positioning block (292) on the left support bar (30) and the right support bar (31) of the workpiece center column. The front push rod (291) of the workpiece passes through the threaded hole in the main body of the sliding positioning block (292) and is rotatably mounted on the sliding positioning block (292). The end of the front push rod (291) facing the workpiece is opposite to the welding notch (153) in the air. The front pressure head (293) of the workpiece is located at the end of the front push rod (291) facing the workpiece. The end of the front push rod (291) away from the workpiece is connected to the linear motion driver.

6. The laser welding machine for the central column of a window screen according to claim 5, characterized in that, There are 4 right-angle positioning components (23), among which the right-angle positioning components (23) can be rotated left and right and are set on the top left side of the steel structure frame (1) via a pivot.

7. The laser welding machine for the central column of a window screen according to claim 1, characterized in that, The top right side of the steel structure frame (1) is also provided with a guardrail welding positioning guide rail (32); the guardrail welding positioning guide rail (32) is clamped and fixed with a guardrail welding positioning fixture (14) for the outer guardrail (G2) of the screen window.

8. The laser welding machine for the central column of a screen window according to claim 5, characterized in that, The right-angle positioning component (23) is equipped with a workpiece detection sensor (22).

9. The laser welding machine for the central column of a screen window according to claim 1, characterized in that, The steel structure frame (1) is provided with safety light curtains (17) that shoot at each other on the left and right sides of the front side; the steel structure frame (1) is provided with a control button box (19) on the right side; the steel structure frame (1) is provided with a frame sheet metal plate (2) on the outside; the steel structure frame (1) is provided with an electrical control board (45) for controlling the operation of each motion component and a laser (16) for providing high-energy laser to the laser welding head (8) inside; the steel structure frame (1) is also provided with a human-machine interactive cantilever control box (20), a wireless scanner (21), and a foot switch (18). The wireless scanner (21) is wirelessly or electrically connected to the cantilever control box (20), and the foot switch (18) is wirelessly or electrically connected to the cantilever control box (20).

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