A multi-axis rotary laser engraving machine

Abstract

The application discloses a multi-axis linkage rotary laser engraving machine, and particularly relates to the technical field of laser engraving equipment. The multi-axis linkage rotary laser engraving machine comprises a base, a rotating disc, a multi-axis arm, a laser, a fixing seat, a positioning shaft, a lifting cylinder, a lifting seat, a sliding cavity and scraping plates. The scraping plates are integrally connected with scraping parts on one side of the lifting seat. The scraping parts on the two scraping plates jointly form a scraping opening. Driving devices are arranged on the fixing seat and used for driving the two scraping plates to move synchronously and reversely. In the application, the two scraping plates are driven by the driving devices to move close to each other, so that the scraping parts of the scraping plates are in contact with the surface of a workpiece. During the downward movement of the lifting seat, the edge of the scraping opening can scrape off foreign matters attached to the surface of the workpiece, thereby avoiding the attachment of foreign matters and oil stains on the surface of the workpiece, and further avoiding the influence of the laser engraving on the surface of the workpiece, and improving the precision of the laser engraving.

Description

Technical Field

[0001] This invention belongs to the field of laser engraving equipment technology, specifically relating to a multi-axis linkage rotary laser engraving machine. Background Technology

[0002] Laser engraving is a process that utilizes CNC technology and lasers as the processing medium. The instantaneous melting and vaporization of the material under laser irradiation achieves the desired processing purpose. Laser engraving uses laser technology to write text on objects. This technique produces text without scratches, leaving the object surface smooth and the text unworn. The characteristics of laser processing include: no contact with the material surface, no mechanical movement, no surface deformation, and generally no need for fixation. It is unaffected by the elasticity or flexibility of the material, making it suitable for processing soft materials. It offers high precision, high speed, and a wide range of applications.

[0003] In the process of laser engraving, existing laser engraving equipment may encounter problems such as oil stains or foreign objects adhering to the workpiece surface, which can lead to poor laser ablation effect on the workpiece surface and affect the engraving depth. At the same time, oil stains or other liquids can affect the refraction of laser light, which can further affect the accuracy of laser engraving to a certain extent. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a multi-axis linkage rotary laser engraving machine.

[0005] The technical solution adopted to solve the above-mentioned technical problems is: a multi-axis linkage rotary laser engraving machine, including a base and a turntable mounted on the top of the base, the base being provided with a multi-axis arm, the multi-axis arm being equipped with a laser, and further including:

[0006] A fixed base is coaxially connected to the top surface of the turntable, and a positioning shaft is vertically fixed to the upper surface of the fixed base;

[0007] A lifting cylinder is vertically installed on the top surface of the fixed base. The lifting cylinder is driven and connected to a lifting seat. The lifting seat has a through hole for the positioning shaft to pass through freely. The side wall of the lifting seat has a sliding cavity.

[0008] The scraping plates are engaged at both ends of the sliding cavity. The scraping plates have a scraping part integrally formed and fixed to the side facing the center of the lifting seat. The scraping parts on the two scraping plates together form a scraping opening.

[0009] A drive device provided on the fixed base and used to drive the two scraper blades to move synchronously in opposite directions.

[0010] Furthermore, the top of the base is evenly distributed with multiple support seats, each support seat is equipped with rollers, and the rollers make rolling contact with the bottom of the turntable.

[0011] Furthermore, the base is equipped with a geared motor, and the base is vertically rotatably connected to a rotating shaft. The upper end of the rotating shaft is coaxially connected to the turntable, and the geared motor is driven by the rotating shaft.

[0012] Furthermore, the multi-axis arm includes a first support shaft vertically rotatably connected to one side of the base, a first cantilever fixedly sleeved around the periphery of the first support shaft, a second support shaft vertically rotatably connected to the first cantilever, a second cantilever fixedly sleeved around the periphery of the second support shaft, a third support shaft horizontally rotatably connected to the second cantilever, and the end of the third support shaft connected to the laser.

[0013] A first motor is installed on one side of the base, and the first motor is driven to the first support shaft. A second motor is installed on the second cantilever, and the second motor is driven to the second support shaft. A third motor is installed on the second cantilever, and the third motor is driven to the third support shaft.

[0014] Furthermore, the base is vertically mounted with a guide column, and a connecting plate is fixedly connected to the upper end of the guide column. The upper end of the first support shaft is rotatably connected to the connecting plate.

[0015] Furthermore, a stop ring is fixedly sleeved around the periphery of the positioning shaft.

[0016] Furthermore, the driving device includes a hollow cylinder horizontally and fixedly embedded in the lifting seat. One end of the hollow cylinder adjacent to the lifting seat is closed. A connecting rod is horizontally fixed to the scraper. The end of the connecting rod away from the scraper slides through the closed end of the hollow cylinder. A first piston is fixed to the end of the connecting rod that penetrates into the hollow cylinder. The first piston is coaxially engaged with the hollow cylinder and slides freely within the hollow cylinder. The fixed seat is provided with a pneumatic assembly, which is used to drive the first piston to move towards the center of the lifting seat when the lifting seat moves downward.

[0017] Furthermore, the pneumatic assembly includes a fixed cylinder vertically connected to the top of the fixed base, a second piston coaxially engaged inside the fixed cylinder, the second piston sliding freely vertically within the fixed cylinder, a lifting rod vertically fixed to the bottom of the lifting base, the lower end of the lifting rod being fixedly connected to the end face of the second piston, a plug being installed at the other end of the hollow cylinder, a flexible hose being connected between the plug and the fixed cylinder, and the flexible hose communicating with the hollow cylinder and the inner cavity of the fixed cylinder.

[0018] Furthermore, the first piston end face has a blind hole-shaped mounting cavity, the connecting rod has a communicating cavity that communicates with the mounting cavity, the scraper wall has an air blowing hole that penetrates the communicating cavity, the mounting cavity has a communicating component that is used to depressurize the hollow cylinder and simultaneously make the communicating cavity and the hollow cylinder cavity communicate.

[0019] Furthermore, the connecting component includes a fixed ring coaxially and fixedly engaged within the mounting cavity, the fixed ring having a connecting hole on its end face, a sliding plug coaxially and slidably engaged within the mounting cavity, the sliding plug having a connecting groove offset from the connecting hole on its end face, and a spring provided within the mounting cavity, the spring elastically abutting against the sliding plug and imparting potential energy to the sliding plug to move toward the fixed ring.

[0020] The beneficial effects of this invention are as follows:

[0021] (1) The present invention sets two scraping plates. Under the drive of the driving device, the two scraping plates approach each other, so that the scraping part of the scraping plate contacts the workpiece surface. When the lifting seat moves downward, the edge of the scraping mouth can scrape off foreign objects attached to the workpiece surface, thereby avoiding foreign objects, oil stains, etc. from adhering to the workpiece surface and affecting the laser engraving on the workpiece surface, thus improving the accuracy of laser engraving.

[0022] (2) When the lifting seat moves downward, the lifting rod drives the second piston to slide in the fixed cylinder and compresses the air in the fixed cylinder into the hollow cylinder, thereby driving the first piston to move, so that the first piston drives the scraper to move towards the workpiece, thereby causing the scraping edge of the scraper to contact the workpiece surface, and thus continuously scraping away foreign objects from the workpiece surface as the lifting seat moves downward.

[0023] (3) By setting up a connecting component, when the second piston moves downward in the fixed cylinder, the air in the fixed cylinder enters the hollow cylinder, so that part of the air continues to drive the first piston, causing the scraper to scrape away foreign objects on the surface of the workpiece. At the same time, part of the air triggers the action of the connecting component, so that part of the air can enter the connecting cavity of the connecting rod, and then blow it to the surface of the workpiece through the air blowing hole. This can blow away foreign objects on the surface of the workpiece, and also blow away foreign objects attached to the lower surface of the scraping part. In addition, it can avoid generating a large thrust on the first piston, causing the scraping mouth to have an excessively large pressing force on the surface of the workpiece, which would cause the scraping mouth to cause greater wear on the surface of the workpiece when the lifting seat moves downward. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of a multi-axis linkage rotary laser engraving machine according to the present invention;

[0025] Figure 2 yes Figure 1 A diagram illustrating the positional relationship from another perspective;

[0026] Figure 3 This is a schematic diagram showing the positional relationship between the fixed base and the positioning shaft after assembly in this invention;

[0027] Figure 4 yes Figure 3 Enlarged schematic diagram of the local structure at point A;

[0028] Figure 5 yes Figure 3 A schematic diagram showing the positional relationship of a local structure after it has been cut open.

[0029] Figure 6 yes Figure 5 Enlarged schematic diagram of the local structure at point B;

[0030] Figure 7 This is a schematic diagram showing the positional relationship between the scraper and the connecting rod after assembly in this invention;

[0031] Figure 8 yes Figure 7 Cross-sectional view of the structure.

[0032] Reference numerals: 1. Gear motor; 2. Support base; 3. Base; 4. Turntable; 5. Fixed base; 6. Fixed cylinder; 7. Workpiece; 8. Laser; 9. Third support shaft; 10. Third motor; 11. Second cantilever; 12. Second motor; 13. Second support shaft; 14. First cantilever; 15. First support shaft; 16. Guide column; 17. Rotating shaft; 18. First motor; 19. Lifting seat; 20. Flexible hose; 21. 1. Positioning shaft; 22. Lifting rod; 23. Stop ring; 24. Scraper; 25. Through hole; 26. Lifting cylinder; 27. Block; 28. Sliding cavity; 29. ​​Second piston; 30. Hollow cylinder; 31. Connecting hole; 32. Fixing ring; 33. Connecting groove; 34. Sliding plug; 35. Spring; 36. Connecting cavity; 37. Air hole; 38. Connecting rod; 39. Scraping part; 40. First piston; 41. Mounting cavity. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0034] like Figures 1-8As shown, this embodiment provides a multi-axis linkage rotary laser engraving machine, including a base 3 and a turntable 4 mounted on the top of the base 3. The base 3 is provided with a multi-axis arm. Specifically, the multi-axis arm includes a first support shaft 15 vertically rotatably connected to one side of the base 3, a first cantilever 14 fixedly sleeved around the periphery of the first support shaft 15, a second support shaft 13 vertically rotatably connected to the first cantilever 14, a second cantilever 11 fixedly sleeved around the periphery of the second support shaft 13, a third support shaft 9 horizontally rotatably connected to the second cantilever 11, a laser 8 mounted at the end of the third support shaft 9, a first motor 18 mounted on one side of the base 3, the first motor 18 being drivenly connected to the first support shaft 15, a second motor 12 mounted on the second cantilever 11, the second motor 12 being drivenly connected to the second support shaft 13, and a third motor 10 mounted on the second cantilever 11, the third motor 10 being drivenly connected to the third support shaft 9. The first support shaft 15 is rotated by the first motor 18, thereby driving the first cantilever 14 to rotate on the horizontal plane. The second motor 12 drives the second support shaft 13 to rotate, allowing the second cantilever 11 to rotate on the horizontal plane. The third motor 10 drives the third support shaft 9 to rotate, allowing the laser 8 to rotate. This enables the laser 8 to perform laser engraving operations in multiple dimensions. In addition, multiple support seats 2 are evenly distributed on the top of the base 3. The support seats 2 are equipped with rollers, which roll in contact with the bottom of the turntable 4, thus supporting the turntable 4. Furthermore, the base 3 is equipped with a reduction motor 1. The base 3 is vertically rotatably connected to a rotating shaft 17. The upper end of the rotating shaft 17 is coaxially connected to the turntable 4. The reduction motor 1 is driven by the rotating shaft 17, and the reduction motor 1 drives the rotating shaft 17 to rotate, enabling the rotating shaft 17 to drive the turntable 4 to rotate. The base 3 is vertically equipped with a guide column 16. A connecting plate is fixed to the upper end of the guide column 16. The upper end of the first support shaft 15 is rotatably connected to the connecting plate. The guide column 16 supports and reinforces the first support shaft 15, preventing rigid deformation of the first support shaft 15.

[0035] A fixed seat 5 is coaxially connected to the top surface of the turntable 4. A positioning shaft 21 is vertically fixed to the upper surface of the fixed seat 5. The outer diameter of the positioning shaft 21 matches the inner diameter of the workpiece 7, allowing the workpiece 7 to be fitted onto the positioning shaft 21. A lifting cylinder 26 is vertically mounted on the top surface of the fixed seat 5. The lifting cylinder 26 drives a lifting seat 19. The lifting seat 19 has a through hole 25 for the positioning shaft 21 to pass freely. A sliding cavity 28 is formed on the side wall of the lifting seat 19. A scraper 24 is engaged at each end of the sliding cavity 28. The scraper plate 24 is integrally formed and fixedly connected to the scraper part 39 on the side facing the center of the lifting seat 19. The scraper parts 39 on the two scraper plates 24 together form a scraping opening. When the end faces of the two scraper parts 39 abut each other, the inner diameter of the scraping opening matches the outer diameter of the workpiece 7. A stop ring 23 is fixedly sleeved around the periphery of the positioning shaft 21. The stop ring 23 can limit the workpiece 7, prevent the workpiece 7 from moving downward on the positioning shaft 21, and make the workpiece 7 and the fixed seat 5 have a certain longitudinal distance.

[0036] Hollow cylinders 30 are fixedly and horizontally embedded on both sides of the lifting seat 19. The end of the hollow cylinder 30 adjacent to the lifting seat 19 is closed. A connecting rod 38 is horizontally fixed to the scraper plate 24. The end of the connecting rod 38 away from the scraper plate 24 slides through the closed end of the hollow cylinder 30. A first piston 40 is fixedly connected to the end of the connecting rod 38 that enters the hollow cylinder 30. The first piston 40 is coaxially engaged with the hollow cylinder 30 and slides freely within the hollow cylinder 30. A fixed cylinder 6 is vertically connected to the top of the fixed seat 5. A second piston 29 is coaxially engaged and installed inside the fixed cylinder 6. The second piston 29 slides vertically freely within the fixed cylinder 6. A lifting rod is vertically fixed to the bottom of the lifting seat 19. 22. The lower end of the lifting rod 22 is fixedly connected to the end face of the second piston 29. A block 27 is installed at the other end of the hollow cylinder 30. A hose 20 is connected between the block 27 and the fixed cylinder 6. The hose 20 communicates with the hollow cylinder 30 and the inner cavity of the fixed cylinder 6. When the lifting seat 19 moves downward, the lifting rod 22 will drive the second piston 29 to move downward, causing the second piston 29 to slide in the inner cavity of the fixed cylinder 6 and compress the air in the inner cavity of the fixed cylinder 6 into the hollow cylinder 30 through the hose 20. This will increase the air pressure in the hollow cylinder 30 and generate a thrust on the first piston 40, causing the first piston 40 to drive the connecting rod 38 to move toward the workpiece 7.

[0037] The first piston 40 has a blind-hole type mounting cavity 41 on its end face. A connecting cavity 36 is formed inside the connecting rod 38, communicating with the mounting cavity 41. An air-blowing hole 37 penetrating the connecting cavity 36 is formed on the wall of the scraping part 39. A fixing ring 32 is coaxially and fixedly engaged in the mounting cavity 41. The end face of the fixing ring 32 has a connecting hole 31. A sliding plug 34 is coaxially and slidably engaged in the mounting cavity 41. The end face of the sliding plug 34 has a connecting groove 33 that is offset from the connecting hole 31. A spring 35 is provided in the mounting cavity 41. The spring 35 elastically abuts against the sliding plug 34 and imparts potential energy for the sliding plug 34 to move towards the fixing ring 32. When the second piston 29 moves downwards inside the fixed cylinder 6, air inside the fixed cylinder 6 enters the hollow cylinder 30, causing... A portion of the air continues to drive the first piston 40, causing the scraper 24 to scrape away foreign objects from the surface of the workpiece 7. At the same time, a portion of the air pushes the sliding plug 34, causing the sliding plug 34 to overcome the elastic resistance of the spring 35 and move away from the fixed ring 32. This allows some air to enter the connecting cavity 36 of the connecting rod 38 and then be blown onto the surface of the workpiece 7 through the air blowing hole 37. This blows away foreign objects from the surface of the workpiece 7 and also blows away foreign objects attached to the lower surface of the scraper 39. In addition, it avoids generating a large thrust on the first piston 40, which would cause the scraper to exert too much pressure on the surface of the workpiece 7, resulting in excessive wear on the surface of the workpiece 7 when the lifting seat 19 moves downward.

[0038] The working principle of this embodiment is as follows:

[0039] The workpiece 7 is placed on the positioning shaft 21. Under its own weight, the workpiece 7 will fall downwards on the positioning shaft 21 until the lower end face of the workpiece 7 abuts against the end face of the stop ring 23, preventing the workpiece 7 from moving further downwards. Then, the lifting cylinder 26 is activated, and the cylinder rod of the lifting cylinder 26 moves downwards, causing the lifting seat 19 to move downwards. When the lifting seat 19 moves downwards, the second piston 29 moves downwards inside the fixed cylinder 6. Air inside the fixed cylinder 6 enters the hollow cylinder 30, causing some of the air to continue to drive the first piston 40, causing the scraper plate 24 to scrape away foreign objects from the surface of the workpiece 7. At the same time, some of the air pushes the sliding plug 34, causing the sliding plug 34 to overcome the elastic resistance of the spring 35 and move away from the fixed ring 32. This allows some air to enter the communicating cavity 36 of the connecting rod 38. Then, the air is blown onto the surface of the workpiece 7 through the air hole 37. This blows away foreign objects on the surface of the workpiece 7 and also blows away foreign objects attached to the lower surface of the scraping part 39. In addition, it can avoid generating too much thrust on the first piston 40, which would cause the scraping edge to have too much pressure on the surface of the workpiece 7. This would cause the scraping edge to cause greater wear on the surface of the workpiece 7 when the lifting seat 19 moves downward. When the lifting seat 19 moves downward until its top surface is below the stop ring 23, the lifting cylinder 26 stops moving. Then, the first motor 18, the second motor 12, the third motor 10, and the reduction motor 1 are started by the external electrical control cabinet, so that the first support shaft 15, the second support shaft 13, the third support shaft 9, and the rotating shaft 17 can rotate accordingly, so that the laser 8 can perform laser engraving operations on the surface of the workpiece 7 along a specific trajectory.

[0040] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention.

Claims

1. A multi-axis rotary laser engraving machine, comprising a base (3) and a turntable (4) mounted on top of the base (3), wherein the base (3) is provided with a multi-axis arm, and the multi-axis arm is equipped with a laser (8), characterized in that, Also includes: A fixed seat (5) is coaxially connected to the top surface of the turntable (4), and a positioning shaft (21) is vertically fixed to the upper surface of the fixed seat (5); A lifting cylinder (26) is vertically installed on the top surface of the fixed base (5). The lifting cylinder (26) is driven and connected to a lifting seat (19). The lifting seat (19) has a through hole (25) for the positioning shaft (21) to pass freely. The side wall of the lifting seat (19) has a sliding cavity (28). The scraper plates (24) are engaged at both ends of the sliding cavity (28). The scraper plates (24) have a scraping part (39) integrally formed and fixed on the side facing the center of the lifting seat (19). The scraping parts (39) on the two scraper plates (24) together form a scraping opening. A drive device provided on the fixed base (5) and used to drive the two scraper blades (24) to move synchronously in opposite directions.

2. The multi-axis linkage rotary laser engraving machine according to claim 1, characterized in that, The base (3) has multiple support seats (2) evenly distributed on its top. Each support seat (2) is equipped with a roller, which makes rolling contact with the bottom of the turntable (4).

3. A multi-axis linkage rotary laser engraving machine according to claim 2, characterized in that, The base (3) is equipped with a geared motor (1), and the base (3) is vertically rotatably connected to a rotating shaft (17). The upper end of the rotating shaft (17) is coaxially connected to the turntable (4), and the geared motor (1) is driven by the rotating shaft (17).

4. A multi-axis linkage rotary laser engraving machine according to claim 1, characterized in that, The multi-axis arm includes a first support shaft (15) vertically rotatably connected to one side of the base (3), a first cantilever (14) fixedly sleeved around the periphery of the first support shaft (15), a second support shaft (13) vertically rotatably connected to the first cantilever (14), a second cantilever (11) fixedly sleeved around the periphery of the second support shaft (13), a third support shaft (9) horizontally rotatably connected to the second cantilever (11), and the end of the third support shaft (9) connected to the laser (8). A first motor (18) is installed on one side of the base (3), and the first motor (18) is driven to the first support shaft (15). A second motor (12) is installed on the second cantilever (11), and the second motor (12) is driven to the second support shaft (13). A third motor (10) is installed on the second cantilever (11), and the third motor (10) is driven to the third support shaft (9).

5. A multi-axis linkage rotary laser engraving machine according to claim 4, characterized in that, The base (3) is vertically mounted with a guide column (16), and a connecting plate is fixedly connected to the upper end of the guide column (16). The upper end of the first support shaft (15) is rotatably connected to the connecting plate.

6. A multi-axis linkage rotary laser engraving machine according to claim 1, characterized in that, A stop ring (23) is fixedly sleeved around the periphery of the positioning shaft (21).

7. A multi-axis linkage rotary laser engraving machine according to claim 1, characterized in that, The driving device includes a hollow cylinder (30) horizontally fixedly embedded in the lifting seat (19). The end of the hollow cylinder (30) adjacent to the lifting seat (19) is closed. A connecting rod (38) is horizontally fixed to the scraper plate (24). The end of the connecting rod (38) away from the scraper plate (24) is slidably inserted through the closed end of the hollow cylinder (30). The end of the connecting rod (38) inserted into the hollow cylinder (30) is fixedly connected to a first piston (40). The first piston (40) is coaxially engaged with the hollow cylinder (30) and slides freely inside the hollow cylinder (30). The fixed seat (5) is provided with a pneumatic assembly. The pneumatic assembly is used to drive the first piston (40) to move toward the center of the lifting seat (19) when the lifting seat (19) moves downward.

8. A multi-axis linkage rotary laser engraving machine according to claim 7, characterized in that, The pneumatic assembly includes a fixed cylinder (6) vertically connected to the top of the fixed base (5). A second piston (29) is coaxially engaged inside the fixed cylinder (6). The second piston (29) slides vertically and freely inside the fixed cylinder (6). A lifting rod (22) is vertically fixed to the bottom of the lifting base (19). The lower end of the lifting rod (22) is fixed to the end face of the second piston (29). A plug (27) is installed at the other end of the hollow cylinder (30). A hose (20) is connected between the plug (27) and the fixed cylinder (6). The hose (20) communicates with the hollow cylinder (30) and the inner cavity of the fixed cylinder (6).

9. A multi-axis linkage rotary laser engraving machine according to claim 7, characterized in that, The first piston (40) has a blind hole-shaped mounting cavity (41) on its end face. The connecting rod (38) has a connecting cavity (36) that communicates with the mounting cavity (41). The scraper (39) has an air hole (37) that passes through the connecting cavity (36) on its wall. The mounting cavity (41) has a connecting component that is used to depressurize the hollow cylinder (30) and make the connecting cavity (36) and the inner cavity of the hollow cylinder (30) communicate.

10. A multi-axis linkage rotary laser engraving machine according to claim 9, characterized in that, The connecting component includes a fixed ring (32) coaxially and fixedly engaged in the mounting cavity (41), the fixed ring (32) having a connecting hole (31) on its end face, a sliding plug (34) coaxially and slidably engaged in the mounting cavity (41), the sliding plug (34) having a connecting groove (33) offset from the connecting hole (31) on its end face, and a spring (35) provided in the mounting cavity (41), the spring (35) elastically abutting against the sliding plug (34) and imparting potential energy to the sliding plug (34) to move in the direction of the fixed ring (32).

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