Laser cutting machine

Abstract

The invention relates to the technical field of laser cutting, in particular to a laser cutting machine which comprises a workbench and a laser, driving rails are fixedly connected to the two sides of the workbench and used for driving a portal frame to move longitudinally, the laser is in sliding fit with the portal frame, and a linear motor is installed on the portal frame to drive the laser to move transversely. According to the laser cutting machine, the ball seat is arranged at the vertex angle of the triangular supporting plate, the ball body is arranged in the ball seat in a rotating fit mode, the ball body is used for supporting a workpiece in a point contact mode, after machining is completed every time, the brush is used for cleaning, when the brush sweeps over the surface of the ball body, the surface of the ball body is not damaged, and the surface of the ball body is not damaged. The ball body rotates in the ball seat under the action of friction force, after the ball body rotates, a contact point originally making contact with a workpiece is transferred, a new contact point replaces the original contact point, and therefore the problem that the machining precision is reduced in the subsequent machining process due to abrasion of the original contact point is solved.

Description

Technical Field

[0001] The invention relates to the technical field of laser cutting, and in particular to a laser cutting machine. Background Art

[0002] It is known that a laser cutting machine focuses the laser light emitted by a laser into a high-power density beam through an optical path system. When this laser beam irradiates the surface of a workpiece, the workpiece material will be heated to the melting point or boiling point. Subsequently, high-pressure gas coaxial with the beam will blow the molten or vaporized metal away from the working area.

[0003] However, a large amount of metal slag is generated during the operation of the above-mentioned laser cutting machine. The slag is blown away by the high-pressure gas and often adheres to the support bar of the work table of the laser cutting machine. The metal slag on the support bar will cause the surface flatness of the support bar to decrease, thereby affecting the processing accuracy of the laser cutting machine. In the prior art, in order to solve the problem of the decrease in the surface flatness of the support bar caused by the adhesion of metal slag, a triangular support plate is set on the surface of the support bar, and the top angle of the support plate is used to support the workpiece, and point contact is used to reduce the contact area, thereby solving this problem.

[0004] Although reducing the contact area can solve the problem of reduced machining accuracy caused by the adhesion of metal slag, in actual application, the point contact method requires the corner of each support plate to provide a large force for supporting the workpiece, so that the top corner of each support plate will be under great pressure, which can easily cause the top corner of the support plate to wear quickly. Summary of the invention

[0005] The purpose of the present invention is to solve the defect in the prior art that the top corner of the support plate is quickly worn out, resulting in a decrease in processing accuracy, and to propose a laser cutting machine.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A laser cutting machine is designed, including a workbench and a laser. Drive rails are fixedly connected on both sides of the workbench to drive the longitudinal displacement of a gantry. The laser is slidably matched with the gantry. A linear motor is installed on the gantry to drive the lateral displacement of the laser. A plurality of support bars are fixedly connected to the workbench surface at intervals. A plurality of connecting structures are provided on the support bars to connect triangular support plates. A ball seat is fixedly connected to the top of the support plate. A sphere for lifting a workpiece is rotatably matched in the ball seat. A circular ring-shaped grinding piece is fixedly connected to the top of the ball seat to grind and clean the surface of the sphere.

[0007] Preferably, the connection structure comprises a slide groove, the slide groove is rotatably mounted on the top of the support bar, a slide plate is slidably fitted in the slide groove, and the support plate is fixedly connected to the slide plate.

[0008] Preferably, a steering structure is provided at the bottom of the support bar to make the support plate point to the location of the laser, and the steering structure includes a pipe fitting, which is rotatably installed on the support bar, one end of the pipe fitting is fixed to the bottom of the slide groove, and the other end is fixed to a weather vane.

[0009] Preferably, a displacement structure is provided in the slide groove to drive the slide plate to slide in the slide groove, and the displacement structure includes a rotor and a ring gear. The rotor is rotatably installed in the slide groove, and the ring gear is sleeved on the outside of the rotor. A guide groove is radially opened on the outer wall of the rotor, and a limit block is slidably matched in the guide groove. A spring is fixed in the guide groove to apply tension to the limit block. A limit groove is opened on the inner wall of the ring gear, and the limit block cooperates with the limit groove. A rack is fixed to the bottom of the slide plate, and the rack matches the ring gear.

[0010] Preferably, a rotating structure is provided in the pipe to drive the rotor to rotate, and the rotating structure includes a first connecting shaft and a second connecting shaft, one end of the first connecting shaft is fixedly connected to the rotor, and the other end is connected to the top of the second connecting shaft through a first one-way bearing, and an axial flow fan is fixedly connected to the bottom end of the second connecting shaft.

[0011] Preferably, a first end face gear is fixedly connected to the first connecting shaft, a second end face gear is installed on the second connecting shaft via a second one-way bearing, a spur gear is rotatably installed on the inner wall of the pipe, and both the first end face gear and the second end face gear match the spur gear.

[0012] Preferably, a hydraulic damper for resetting the slide plate is provided on the support plate, the hydraulic damper is in a contracted state under normal conditions, one end of the hydraulic damper is fixedly connected to the slide groove, and the other end is fixedly connected to the support plate.

[0013] A laser cutting machine proposed in the present invention has the following beneficial effects: the laser cutting machine provided by the present invention has a ball seat arranged at the top corner of a triangular support plate, a sphere rotatably fitted in the ball seat, and the sphere is used to support the workpiece in a point contact manner, and after each processing is completed, a brush is used for cleaning, and when the brush sweeps over the surface of the sphere, the sphere rotates in the ball seat under the action of friction, and after the rotation of the sphere, the contact point originally in contact with the workpiece will be transferred, and the new contact point will replace the original contact point, thereby preventing the original contact point from being worn, resulting in a decrease in processing accuracy during subsequent processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural schematic diagram of a laser cutting machine proposed by the present invention.

[0015] Figure 2 A cross-sectional view of a laser cutting machine proposed in the present invention.

[0016] Figure 3This is a schematic structural diagram of the cooperation between a support plate and a support bar of a laser cutting machine proposed by the present invention.

[0017] Figure 4 A laser cutting machine proposed by the present invention Figure 3 Enlarged view of point A in the middle.

[0018] Figure 5 This is a schematic structural diagram of the bottom of a slideway of a laser cutting machine proposed by the present invention.

[0019] Figure 6 A schematic diagram of the internal structure of a tube of a laser cutting machine proposed by the present invention Figure 1 .

[0020] Figure 7 A laser cutting machine proposed by the present invention Figure 6 The enlarged diagram of the structure at point B in the middle.

[0021] Figure 8 A schematic diagram of the internal structure of a tube of a laser cutting machine proposed by the present invention Figure 2 .

[0022] Fig. 9 This is a cross-sectional view of the interior of a pipe of a laser cutting machine proposed in the present invention.

[0023] Fig.10 This is a schematic diagram of the structure of the cooperation between the rotor and gear of a laser cutting machine proposed by the present invention.

[0024] In the figure: 1. workbench; 2. drive track; 3. gantry; 4. linear motor; 5. laser; 6. support bar; 7. support plate; 701. hydraulic damper; 8. slide groove; 9. slide plate; 10. ball seat; 11. sphere; 12. polishing part; 13. pipe fitting; 14. weather vane; 15. axial fan; 16. first connecting shaft; 17. second connecting shaft; 18. first end face gear; 19. first one-way bearing; 20. second end face gear; 21. second one-way bearing; 22. spur gear; 23. rotor; 24. ring gear; 25. limit groove; 26. limit block; 27. spring; 28. guide groove; 29. ​​rack. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0026] Example 1: Reference Figure 1-Figure 4A laser cutting machine includes a workbench 1 and a laser 5. Drive rails 2 are fixedly connected to both sides of the workbench 1 to drive the gantry 3 to move longitudinally. The laser 5 is slidably matched with the gantry 3. A linear motor 4 is installed on the gantry 3 to drive the laser 5 to move laterally. A plurality of support bars 6 are fixedly connected to the surface of the workbench 1 at intervals. A plurality of connecting structures are provided on the support bars 6 to connect triangular support plates 7. A ball seat 10 is fixedly connected to the top of the support plate 7. A sphere 11 for lifting a workpiece is rotatably matched in the ball seat 10. A circular ring-shaped grinding piece 12 is fixedly connected to the top of the ball seat 10 to grind and clean the surface of the sphere 11.

[0027] When the laser cutting machine is working, the workpiece is supported by the sphere 11 on the top of the support plate 7, the driving track 2 cooperates with the linear motor 4 to drive the laser 5 to move, and the laser emitted by the laser 5 cuts the workpiece.

[0028] The device sets a ball seat 10 at the top corner of the triangular support plate 7, and a sphere 11 is rotatably fitted inside the ball seat 10. The sphere 11 is used to support the workpiece in a point contact manner. After each processing is completed, a brush is used for cleaning. When the brush sweeps over the surface of the sphere 11, the sphere 11 rotates inside the ball seat 10 under the action of friction. After the rotation of the sphere 11, the original contact point with the workpiece will be transferred, and the new contact point will replace the original contact point, thereby preventing the original contact point from being worn and causing a decrease in processing accuracy in the subsequent processing process.

[0029] In addition, the present invention provides a grinding piece 12 on the upper end surface of the ball seat 10, and the grinding piece 12 always keeps in contact with the sphere 11. During the rotation of the sphere 11, the grinding piece 12 will grind and clean the surface of the sphere 11, and clean up the metal slag splashed on the surface of the sphere 11, thereby ensuring the smoothness of the surface of the sphere 11 to prevent the sphere 11 from affecting the processing accuracy due to the surface flatness.

[0030] Embodiment 2: When laser cutting a thin plate, since the laser beam is accompanied by a coaxial high-pressure airflow, the high-pressure airflow will also pass through the cut on the thin plate made by the laser beam. If the distance between the cut and the support point is large, the high-pressure airflow will cause the cut edge of the thin plate to vibrate. If the amplitude is large, the workpiece position will be offset, which will also affect the processing accuracy. Therefore, in order to solve this problem: like Figure 5-Figure 8 As shown, the connection structure includes a slide groove 8, which is rotatably installed on the top of the support bar 6. A slide plate 9 is slidably fitted in the slide groove 8. The support plate 7 is fixedly connected to the slide plate 9. A steering structure is provided at the bottom of the support bar 6 to make the support plate 7 point to the position of the laser 5. The steering structure includes a pipe 13, which is rotatably installed on the support bar 6. One end of the pipe 13 is fixedly connected to the bottom of the slide groove 8, and the other end is fixedly connected to a weather vane 14.

[0031] During the laser cutting process, the high-pressure airflow passes through the incision and impacts the surface of the workbench 1, then flows around and along the surface of the workbench 1. The airflow flowing on the surface of the workbench 1 will cause the wind vane 14 to rotate to point to the incision. The wind vane 14 drives the slide 8 to rotate through the pipe 13, so that the slide 8 also points to the incision.

[0032] Then the slide plate 9 is made to slide in the slide groove 8, and the sliding direction of the slide plate 9 is the direction approaching the incision, so that the support plate 7 on the slide plate 9 is reset and gathered toward the incision, thereby reducing the distance between the incision and the supporting point, so that the ball 11 is supported close to the incision.

[0033] like Figure 6-Figure 8 As shown, a displacement structure is provided in the slide groove 8 to drive the slide plate 9 to slide in the slide groove 8, and the displacement structure includes a rotor 23 and a ring gear 24. The rotor 23 is rotatably installed in the slide groove 8, and the ring gear 24 is sleeved on the outside of the rotor 23. A guide groove 28 is radially opened on the outer wall of the rotor 23. A limit block 26 is slidably matched in the guide groove 28. A spring 27 is fixed in the guide groove 28 to apply tension to the limit block 26. A limit groove 25 is opened on the inner wall of the ring gear 24, and the limit block 26 cooperates with the limit groove 25. A rack 29 is fixed to the bottom of the slide plate 9, and the rack 29 matches the ring gear 24.

[0034] like Fig.10 As shown, when the rotor 23 rotates, the limit block 26 will be driven to rotate synchronously. Under the action of centrifugal force, the limit block 26 overcomes the pulling force of the spring 27 and performs centrifugal movement in the guide groove 28. During the centrifugal movement, the limit block 26 will be inserted into the limit groove 25. At this time, the rotor 23 and the ring gear 24 are regarded as one body. The rotation of the rotor 23 will cause the ring gear 24 to rotate synchronously. The rotation of the ring gear 24 will drive the rack 29 to move. The displacement of the rack 29 will drive the slide plate 9 to move closer to the incision in the slide groove 8, thereby reducing the distance between the ball 11 and the incision and reducing the amplitude.

[0035] like Fig. 9 As shown, when the axial flow fan 15 is rotated by the wind, the axial flow fan 15 may rotate forward or reversely. In order to ensure that the rotation direction of the rotor 23 is a certain direction, a rotating structure is provided in the pipe 13 to drive the rotor 23 to rotate. The rotating structure includes a first connecting shaft 16 and a second connecting shaft 17. One end of the first connecting shaft 16 is fixedly connected to the rotor 23, and the other end is connected to the top of the second connecting shaft 17 through a first one-way bearing 19. The axial flow fan 15 is fixedly connected to the bottom end of the second connecting shaft 17. A first end face gear 18 is fixedly connected to the first connecting shaft 16. A second end face gear 20 is installed on the second connecting shaft 17 through a second one-way bearing 21. A spur gear 22 is rotatably installed on the inner wall of the pipe 13, and both the first end face gear 18 and the second end face gear 20 match the spur gear 22.

[0036] When the axial flow fan 15 rotates forward, the axial flow fan 15 drives the second connecting shaft 17 to rotate forward. When the second connecting shaft 17 rotates forward, the second one-way bearing 21 can rotate freely while the first one-way bearing 19 is locked. At this time, the second connecting shaft 17 will drive the first connecting shaft 16 to rotate forward through the first one-way bearing 19.

[0037] When the axial flow fan 15 rotates in the reverse direction, the axial flow fan 15 drives the second connecting shaft 17 to rotate in the reverse direction. When the second connecting shaft 17 rotates in the reverse direction, the second one-way bearing 21 is locked and the first one-way bearing 19 can rotate freely. At this time, the reverse rotation of the second connecting shaft 17 will drive the second end face gear 20 to rotate in the reverse direction. The reverse rotation of the second end face gear 20 will drive the first end face gear 18 to rotate forward through the spur gear 22. The forward rotation of the first end face gear 18 will drive the first connecting shaft 16 to rotate forward.

[0038] Based on the above description, it can be known that when the axial flow fan 15 rotates, the first connecting shaft 16 also rotates and the rotation direction is determined. Therefore, the rotation direction of the rotor 23 driven by the first connecting shaft 16 is also determined, ensuring that the forward direction of the rack 29 driven by the ring gear 24 is close to the incision.

[0039] like Figure 3 As shown, a hydraulic damper 701 for resetting the slide plate 9 is provided on the support plate 7 . The hydraulic damper 701 is in a contracted state under normal conditions. One end of the hydraulic damper 701 is fixedly connected to the slide groove 8 , and the other end is fixedly connected to the support plate 7 .

[0040] Working principle and workflow: When the laser cutting machine is working, the workpiece is supported by the sphere 11 on the top of the support plate 7, the driving track 2 cooperates with the linear motor 4 to drive the laser 5 to move, and the laser emitted by the laser 5 cuts the workpiece.

[0041] A ball seat 10 is set at the top corner of the triangular support plate 7. A sphere 11 is rotatably fitted inside the ball seat 10. The sphere 11 is used to support the workpiece in a point contact manner. After each processing is completed, a brush is used for cleaning. When the brush sweeps over the surface of the sphere 11, the sphere 11 rotates inside the ball seat 10 under the action of friction. After the rotation of the sphere 11, the original contact point with the workpiece will be transferred, and the new contact point will replace the original contact point, thereby preventing the original contact point from being worn, resulting in a decrease in processing accuracy during subsequent processing.

[0042] In addition, the present invention provides a grinding piece 12 on the upper end surface of the ball seat 10, and the grinding piece 12 always keeps in contact with the sphere 11. During the rotation of the sphere 11, the grinding piece 12 will grind and clean the surface of the sphere 11, and clean up the metal slag splashed on the surface of the sphere 11, thereby ensuring the smoothness of the surface of the sphere 11 to prevent the sphere 11 from affecting the processing accuracy due to the surface flatness.

[0043] During the laser cutting process, the high-pressure airflow passes through the incision and impacts the surface of the workbench 1, then flows around and along the surface of the workbench 1. The airflow flowing on the surface of the workbench 1 will cause the wind vane 14 to rotate to point to the incision. The wind vane 14 drives the slide 8 to rotate through the pipe 13, so that the slide 8 also points to the incision.

[0044] The axial flow fan 15 rotates under the action of wind, and the rotation of the axial flow fan 15 will cause the rotor 23 to rotate in a single direction. When the rotor 23 rotates, it will drive the limit block 26 to rotate synchronously. Under the action of centrifugal force, the limit block 26 overcomes the pulling force of the spring 27 and performs centrifugal movement in the guide groove 28. The limit block 26 will be inserted into the limit groove 25 during the centrifugal movement. At this time, the rotor 23 and the ring gear 24 are regarded as one. The rotation of the rotor 23 will cause the ring gear 24 to rotate synchronously. The rotation of the ring gear 24 will drive the rack 29 to move. The displacement of the rack 29 will drive the slide plate 9 to approach the incision in the slide groove 8, so that the support plate 7 on the slide plate 9 is reset and gathered toward the incision, thereby reducing the distance between the incision and the support point, so that the ball 11 is supported close to the incision, thereby reducing the distance between the ball 11 and the incision and reducing the amplitude.

[0045] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A laser cutting machine, comprising a workbench (1) and a laser (5), wherein drive rails (2) are fixedly connected to both sides of the workbench (1) for driving a gantry (3) to move longitudinally, the laser (5) is slidably matched with the gantry (3), and a linear motor (4) is installed on the gantry (3) to drive the laser (5) to move transversely, characterized in that: A plurality of support bars (6) are fixedly connected at intervals on the surface of the workbench (1), and a plurality of connection structures are provided on the support bars (6) for connecting a triangular support plate (7). A ball seat (10) is fixedly connected to the top of the support plate (7), and a sphere (11) for lifting a workpiece is rotatably engaged in the ball seat (10). A circular ring-shaped grinding piece (12) is fixedly connected to the top of the ball seat (10) for grinding and cleaning the surface of the sphere (11).

2. The laser cutting machine according to claim 1, characterized in that: The connection structure comprises a slide groove (8), the slide groove (8) is rotatably mounted on the top of the support bar (6), a slide plate (9) is slidably fitted in the slide groove (8), and the support plate (7) is fixedly connected to the slide plate (9).

3. The laser cutting machine according to claim 2, characterized in that: A steering structure is provided at the bottom of the support bar (6) to direct the support plate (7) toward the location of the laser (5), the steering structure comprising a pipe (13), the pipe (13) being rotatably mounted on the support bar (6), one end of the pipe (13) being fixedly connected to the bottom of the slide groove (8), and the other end being fixedly connected to a weather vane (14).

4. The laser cutting machine according to claim 3, characterized in that: A displacement structure is provided in the slide groove (8) for driving the slide plate (9) to slide in the slide groove (8), the displacement structure comprising a rotor (23) and a ring gear (24), the rotor (23) being rotatably mounted in the slide groove (8), the ring gear (24) being sleeved on the outside of the rotor (23), a guide groove (28) being radially provided on the outer wall of the rotor (23), a limit block (26) being slidably fitted in the guide groove (28), a spring (27) being fixed in the guide groove (28) for applying a pulling force to the limit block (26), a limit groove (25) being provided on the inner wall of the ring gear (24), the limit block (26) being matched with the limit groove (25), a rack (29) being fixed at the bottom of the slide plate (9), the rack (29) being matched with the ring gear (24).

5. The laser cutting machine according to claim 4, characterized in that: A rotating structure is provided in the pipe (13) for driving the rotor (23) to rotate. The rotating structure comprises a first connecting shaft (16) and a second connecting shaft (17). One end of the first connecting shaft (16) is fixedly connected to the rotor (23), and the other end is connected to the top of the second connecting shaft (17) via a first one-way bearing (19). The bottom end of the second connecting shaft (17) is fixedly connected to an axial flow fan (15).

6. The laser cutting machine according to claim 5, characterized in that: A first end face gear (18) is fixedly connected to the first connecting shaft (16), a second end face gear (20) is mounted on the second connecting shaft (17) via a second one-way bearing (21), a spur gear (22) is rotatably mounted on the inner wall of the pipe (13), and both the first end face gear (18) and the second end face gear (20) are matched with the spur gear (22).

7. The laser cutting machine according to claim 6, characterized in that: The support plate (7) is provided with a hydraulic damper (701) for resetting the slide plate (9); the hydraulic damper (701) is normally in a contracted state; one end of the hydraulic damper (701) is fixedly connected to the slide groove (8) and the other end is fixedly connected to the support plate (7).

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