A laser etching device based on surface marking of a curved plastic part

Abstract

The application discloses a radium carving equipment based on surface marking of a curved plastic part, and relates to the technical field of laser engraving of special-shaped parts. The equipment comprises a workbench, a lifting assembly arranged on the workbench, a radium carving part, a profiling clamp, and a driving unit. The lifting assembly is used for driving the radium carving part to displace in the vertical direction. The profiling clamp is rotatably connected to the workbench, and the curved part is clamped by the profiling clamp. The driving unit is used for driving the profiling clamp to rotate. The driving unit can stop when the profiling clamp is at any angle. The profiling clamp has a first marking position, a second marking position and a third marking position in the rotating process. The application can realize sequential marking of multiple surfaces of the curved part in a single clamping and in a single station, thereby improving the efficiency and reducing the cost. When the inner side wall of the curved part is marked, the radium carving part is passively turned over, so that the perpendicularity between the radium carving part and the inner side wall is higher, and the coverage area of the radium carving part on the inner side wall is increased.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of laser engraving of special-shaped parts, in particular to a laser engraving equipment based on surface marking of curved plastic parts. BACKGROUND

[0002] The laser engraving equipment is a precision equipment for non-contact processing on the material surface by using high-energy laser beam to achieve permanent marking or engraving through instantaneous melting and vaporization of the material.

[0003] When marking the curved part, it is divided into single-sided marking and multi-sided marking: single-sided marking only needs to mark on one side, so a profiling fixture is made by CNC machining or 3D printing according to the three-dimensional model of the curved part, which has accurate positioning and fast positioning speed; multi-sided marking needs to mark on multiple sides of the curved part, and ordinary marks are located at external conspicuous positions, while some anti-counterfeit marks are usually set at unconventional positions such as the inner wall of the curved part to increase the difficulty of imitation, so when multi-sided marking is performed, it is divided into the following two ways: one is to use a multi-station mode to mark different positions by multiple stations, which not only affects the efficiency but also significantly increases the equipment cost; the other is to turn the curved part automatically to meet the multi-sided marking, but in the prior art, when marking the inner wall of the curved part, the laser coverage area is small due to the angle deviation between the laser engraving part and the inner wall, which easily causes unclear marking, missing marking and other problems, affecting the marking quality. SUMMARY

[0004] The purpose of the present application is to provide a laser engraving equipment based on surface marking of curved plastic parts to solve the above-mentioned problems in the prior art.

[0005] In order to achieve the above-mentioned purpose, the present application provides the following technical scheme: a laser engraving equipment based on surface marking of curved plastic parts, comprising:

[0006] a workbench;

[0007] a lifting assembly arranged on the workbench;

[0008] a laser engraving part, the lifting assembly is used to drive the laser engraving part to displace in the vertical direction;

[0009] a profiling fixture rotatably connected to the workbench, the curved part is clamped by the profiling fixture;

[0010] a driving unit used to drive the profiling fixture to rotate, the driving unit can stop when the profiling fixture is at any angle, and the profiling fixture has a first marking position, a second marking position and a third marking position during rotation;

[0011] at the first position, the laser engraving part marks the front surface of the curved part;

[0012] The profiling fixture is flipped 180 degrees to a second position, and the laser etching part marks the reverse side of the curved part;

[0013] The profiling fixture is continuously flipped α degrees to a third position, and the laser etching part marks the inner side wall of the curved part;

[0014] The linkage assembly 6 drives the laser etching part to rotate α / 2 degrees synchronously during the flipping of the profiling fixture from the second position to the third position.

[0015] The rotation direction of the laser etching part 3 is opposite to that of the profiling fixture.

[0016] Preferably, the value of α is in the range of 1-30 degrees.

[0017] Preferably, the profiling fixture comprises a semicircular seat, a circular cover, and a shaft rod, the semicircular seat and the circular cover are fixedly installed, the semicircular seat is attached to the bottom surface of the curved part, the circular cover is attached to the top surface of the curved part, the shaft rod is installed on the semicircular seat, and the shaft rod is rotationally connected to the upper part of the workbench.

[0018] Preferably, the driving unit is fixedly installed on the workbench, and the driving unit is used to drive the shaft rod to rotate.

[0019] Preferably, the lifting assembly comprises a lifting part and a mounting table, the lifting part is fixedly installed on the workbench, and the mounting table is installed on the lifting part.

[0020] Preferably, a base is fixedly installed on the mounting table, a central shaft is rotationally connected to the base, a connecting piece is arranged on the central shaft, and the laser etching part is fixedly installed on the connecting piece.

[0021] Preferably, the driving unit comprises a transmission shaft, a rotating sleeve, a linkage part, a plug column, a light gear, an engagement section, and a full gear, the transmission shaft and the shaft rod are fixedly installed, the rotating sleeve is rotationally connected to the workbench, the rotating sleeve and the transmission shaft are transmissionally connected through the linkage part, the plug column is rotationally connected to the mounting table, the lower part of the plug column is slidingly inserted into the rotating sleeve, the light gear is fixedly installed on the upper part of the plug column, the engagement section is arranged on the light gear, and the full gear is fixedly installed on the central shaft.

[0022] Preferably, during the flipping of the profiling fixture from the second position to the third position, the engagement section and the full gear are engaged.

[0023] Preferably, an elastic member is further included, the elastic member is fixedly installed on the mounting table, and the upper part of the elastic member abuts against the laser etching part.

[0024] Preferably, a dust cover is further included, and the dust cover covers the outside of the linkage assembly.

[0025] In the technical scheme, the laser etching equipment based on surface marking of the curved plastic part provided by the application can realize marking of multiple surfaces of the curved part in sequence in a single work station through single clamping, thereby improving efficiency and reducing cost; and when marking the inner side wall of the curved part, the laser etching part is passively turned over, so that the laser etching part and the inner side wall have higher perpendicularity, and the coverage area of the laser etching part to the inner side wall is increased by 30%. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art according to these drawings.

[0027] Figure 1 It is a schematic diagram of the overall structure of the laser etching equipment based on surface marking of the curved plastic part provided by the application.

[0028] Figure 2 It is a schematic diagram of the structure of the profiling clamp and the curved part of the laser etching equipment based on surface marking of the curved plastic part provided by the application.

[0029] Figure 3 It is a schematic diagram of the structure of the linkage assembly of the laser etching equipment based on surface marking of the curved plastic part provided by the application.

[0030] Figure 4 It is a schematic diagram of the structure of the laser etching equipment based on surface marking of the curved plastic part provided by the application. Figure 3 It is a schematic diagram of the structure of the laser etching equipment based on surface marking of the curved plastic part provided by the application.

[0031] Figure 5 It is a schematic diagram of the structure of the laser etching equipment based on surface marking of the curved plastic part provided by the application.

[0032] Figure 6 It is a schematic diagram of the structure of the laser etching equipment based on surface marking of the curved plastic part provided by the application. Figure 5 It is a schematic diagram of the structure of the laser etching equipment based on surface marking of the curved plastic part provided by the application.

[0033] Figure 7 It is a schematic diagram of the structure of the laser etching equipment based on surface marking of the curved plastic part provided by the application.

[0034] Figure 8 It is a schematic diagram of the structure of the laser etching equipment based on surface marking of the curved plastic part provided by the application. Figure 7 It is a schematic diagram of the structure of the laser etching equipment based on surface marking of the curved plastic part provided by the application.

[0035] Figure 9 It is a schematic diagram of the structure of the laser etching equipment based on surface marking of the curved plastic part provided by the application.

[0036] Figure 10 It is a rotating sleeve combined insertion column structure schematic diagram of a radium carving equipment based on surface marking of curved plastic parts of the application;

[0037] Figure 11 It is a radium carving part in the second position and the third position when covering the range of the inner side wall of the curved part schematic diagram of a radium carving equipment based on surface marking of curved plastic parts of the application.

[0038] The label is explained: 1, workbench; 2, lifting assembly; 21, lifting part; 22, mounting table; 3, radium carving part; 4, profiling clamp; 41, semicircular seat; 42, circular cover; 43, shaft; 5, curved part; 6, linkage assembly; 61, transmission shaft; 62, rotating sleeve; 63, linkage part; 64, insertion column; 65, light gear; 66, meshing section; 68, full gear; 71, base; 72, connecting piece; 73, central shaft; 74, elastic member; 8, dust cover; 9, driving unit. DETAILED DESCRIPTION

[0039] In order for those skilled in the art to better understand the technical solutions of the present application, the present application will be further described in detail below with reference to the drawings.

[0040] Please refer to Figures 1-10 The radium carving equipment based on surface marking of curved plastic parts provided by the embodiment of the present application comprises:

[0041] Workbench 1;

[0042] Lifting assembly 2 arranged on workbench 1;

[0043] Radium carving part 3, lifting assembly 2 is used for driving radium carving part 3 to displace in the vertical direction;

[0044] Profiling clamp 4, which is rotationally connected to workbench 1, clamps curved part 5 through profiling clamp 4;

[0045] Driving unit 9, which is used for driving profiling clamp 4 to rotate, can stop when profiling clamp 4 is at any angle, and has a first marking position, a second marking position and a third marking position in the rotation process of profiling clamp 4;

[0046] In the first position, radium carving part 3 marks the front surface of curved part 5;

[0047] Profiling clamp 4 is turned over by 180 degrees to the second position, and radium carving part 3 marks the back surface of curved part 5;

[0048] Profiling clamp 4 is continuously turned over by α degrees to the third position, and radium carving part 3 marks the inner side wall of curved part 5;

[0049] The linkage assembly 6 drives the laser-engraving part 3 to rotate α / 2 degrees synchronously during the process that the profiling clamp 4 is flipped from the second position to the third position.

[0050] The rotating direction of the laser-engraving part 3 is opposite to the rotating direction of the profiling clamp 4.

[0051] In the embodiment of the present application, the lifting assembly 2 is arranged on the workbench 1, which can adjust the height of the laser-engraving part 3 to adapt to different curved parts 5, and facilitate the automatic focusing of the laser-engraving part 3. The working principles of the lifting assembly 2 and the laser-engraving part 3 are prior art, and the present application does not involve the improvement in this aspect, so the lifting assembly 2 and the laser-engraving part 3 will not be described here.

[0052] The profiling clamp 4 is adapted to the shape of the curved part 5, and can fix and clamp the curved part 5. When the profiling clamp 4 rotates, the curved part 5 is flipped 180 degrees with itself as the center, so that the front and back surfaces of the curved part 5 can be marked. The profiling clamp 4 is driven by the driving unit 9, which is a servo motor, and the rotating angle of the servo motor can be stopped at will.

[0053] The profiling clamp 4 has a first marking position, a second marking position and a third marking position during the rotating process, and the three positions correspond to different regions of the curved part 5. During marking, any one or two or more positions can be marked according to the needs.

[0054] Please refer to the accompanying drawings Figure 11 When the inner side wall of the curved part 5 is marked, due to the limitation of the shape of the curved part 5, part of the coverage of the laser head of the laser-engraving part 3 is not on the inner side wall, which leads to the reduction of the marking surface. Therefore, through the arrangement of the linkage assembly 6, when the curved part 5 needs to be marked on the inner side wall, the profiling clamp 4 passively drives the laser-engraving part 3 to rotate in the opposite direction during the rotating process, so that the coverage of the laser head of the laser-engraving part 3 is increased.

[0055] In summary, the present application has the following advantages compared with the prior art: In a single station, once clamping can realize marking of multiple surfaces, reduce the initial investment of clamps and equipment, and reduce the clamping frequency and improve the printing efficiency. When the curved part 5 is marked on the inner side wall, the laser-engraving part 3 can be passively flipped to increase the coverage of the laser head of the laser-engraving part 3 on the inner side wall of the curved part 5, and the applicability is improved.

[0056] In the embodiment of the present application, the value of α is in the range of 1-30 degrees.

[0057] The value of alpha needs to be set according to the actual angle values of the inner side wall and the bottom surface of the curved member 5, and actual comparison experiments are needed.

[0058] In the embodiment of the present application, please refer to Figures 1-2 The profiling fixture 4 comprises a semicircular seat 41, a circular cover 42, and a shaft rod 43. The semicircular seat 41 and the circular cover 42 are fixedly installed, the semicircular seat 41 is attached to the bottom surface of the curved member 5, the circular cover 42 is attached to the top surface of the curved member 5, and the shaft rod 43 is installed on the semicircular seat 41 and rotationally connected to the upper portion of the workbench 1.

[0059] The semicircular seat 41 and the circular cover 42 are connected by three connecting arms, so that an opening for the curved member 5 to enter and exit can be reserved, and the connecting arms abut against the outer surface of the curved member 5 to serve as a triangular positioning function. The shaft rod 43 and the semicircular seat 41 are fixedly installed by bolts to be replaced according to different parts.

[0060] In the embodiment of the present application, please refer to Figure 3 The driving unit 9 is fixedly installed on the workbench 1, and is used to drive the shaft rod 43 to rotate.

[0061] The driving unit 9 adopts a servo motor to facilitate the control of the angle of the shaft rod 43.

[0062] In the embodiment of the present application, please refer to Figure 3 The lifting assembly 2 comprises a lifting portion 21 and a mounting table 22. The lifting portion 21 is fixedly installed on the workbench 1, and the mounting table 22 is installed on the lifting portion 21.

[0063] The lifting portion 21 is combined by an electric push rod and a slide rail, and the mounting table 22 is fixedly installed on the slide rail and is controlled to displace in the vertical direction by the electric push rod. The specific principles are all prior art and will not be described here.

[0064] In the embodiment of the present application, please refer to Figures 3-4 A base 71 is fixedly installed on the mounting table 22, a central shaft 73 is rotationally connected to the base 71, a connecting piece 72 is arranged on the central shaft 73, and the laser engraving portion 3 is fixedly installed on the connecting piece 72.

[0065] The base 71 is fixedly installed on the mounting table 22, the central shaft 73 is rotationally connected to the base 71, and the laser engraving portion 3 is connected to the central shaft 73 through the connecting piece 72. Therefore, when the central shaft 73 rotates, the angle of the laser engraving portion 3 will rotate correspondingly, and the laser head of the laser engraving portion 3 increases the coverage on the inner side wall of the curved member 5 through the rotation of the angle of the laser engraving portion 3.

[0066] In the embodiment of the present application, please refer to Figures 3-8The drive unit 9 includes a drive shaft 61, a rotating sleeve 62, a linkage part 63, a plug 64, a light gear 65, a meshing section 66, and a full gear 68. The drive shaft 61 and the shaft rod 43 are fixedly installed. The rotating sleeve 62 is rotatably connected to the worktable 1. The rotating sleeve 62 and the drive shaft 61 are connected by the linkage part 63. The plug 64 is rotatably connected to the mounting platform 22. The lower part of the plug 64 is slidably inserted into the rotating sleeve 62. The light gear 65 is fixedly installed on the upper part of the plug 64. The meshing section 66 is disposed on the light gear 65. The full gear 68 is fixedly installed on the central shaft 73. During the process of the contour jig 4 flipping from the second position to the third position, the meshing section 66 and the full gear 68 mesh.

[0067] In the first position (attached) of the contour jig 4 Figure 3 (As shown) Flip to the second position (attached) Figure 5 During the process (as shown), the drive unit 9 drives the contour jig 4 to rotate. When the contour jig 4 rotates, the drive shaft 61 rotates synchronously. The drive shaft 61 and the rotating sleeve 62 are connected by the linkage 63, so the rotating sleeve 62 rotates synchronously. The rotating sleeve 62 is rotatably connected to the worktable 1. The lower part of the insertion post 64 is prism-shaped, and the upper part is cylindrical. The lower part of the insertion post 64 is inserted into the rotating sleeve 62. When the rotating sleeve 62 rotates, it drives the insertion post 64 to rotate synchronously. The upper part of the insertion post 64 is rotatably connected to the mounting table 22. The optical gear 65 is fixedly installed on the top of the insertion post 64. When the insertion post 64 rotates, it can drive the optical gear 65 to rotate as shown in the attached diagram. Figure 6 As shown, at this time, the contour jig 4 is in the second position, and the laser engraving part 3 marks the reverse side of the curved part 5. After the marking is completed, the drive unit 9 continues to rotate. At this time, the meshing section 66 meshes with the full gear 68. During the rotation of the optical gear 65, the full gear 68 will be driven to rotate synchronously. When the full gear 68 rotates, it will drive the central shaft 73 to rotate. When the central shaft 73 rotates, under the connection of the connecting part 72, the laser engraving part 3 will change its angle to increase the coverage area of ​​the laser head of the laser engraving part 3 on the inner wall of the curved part 5.

[0068] In an embodiment of the invention, an elastic element 74 is also included, which is fixedly mounted on the mounting platform 22, and the upper part of the elastic element 74 abuts against the laser engraving part 3.

[0069] The elastic member 74 is distributed on one side of the laser-engraved part 3, and after the meshing section 66 and the full gear 68 are separated, the elastic member 74 supports the laser-engraved part 3 to keep it in a horizontal state. A limiting block is arranged at the end of the central shaft 73 away from the full gear 68, which can limit the rotation angle of the central shaft 73. After the laser-engraved part 3 is reset to the horizontal state, the elastic member 74 cannot continue to rebound, and the laser-engraved part 3 cannot continue to rotate counterclockwise, so as to ensure the horizontal state of the laser-engraved part 3.

[0070] The embodiment of the present application also comprises a dust cover 8 which covers the linkage assembly 6 externally.

[0071] Through the arrangement of the dust cover 8, the linkage assembly 6 and the driving unit 9 can be covered, so as to improve the appearance and safety of the equipment.

[0072] It should be noted that the angle compensation deviation caused by the machining error of the meshing section 66 and the full gear 68. During machining, high-precision gears (precision grade 6) are used, and after machining, the gears are matched and ground. During the debugging stage, the angle is calibrated in real time through the sensor.

[0073] The above only describes some exemplary embodiments of the present application by way of illustration, and it is needless to say that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present application. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present application.

Claims

1. A laser engraving device for marking the surface of curved plastic parts, characterized in that, include: Workbench (1); Lifting assembly (2) is installed on the workbench (1); The laser engraving part (3) and the lifting assembly (2) are used to drive the laser engraving part (3) to move in the vertical direction; The contour jig (4) is rotatably connected to the worktable (1), and the curved part (5) is clamped by the contour jig (4); The drive unit (9) is used to drive the contour jig (4) to rotate. The drive unit (9) can stop when the contour jig (4) is at any angle. The contour jig (4) has a first marking position, a second marking position and a third marking position on the rotation path of the contour jig (4). In the first position, the laser engraving part (3) marks the front of the curved part (5); The contour jig (4) is rotated 180 degrees to the second position, and the laser engraving part (3) marks the reverse side of the curved part (5); The contour jig (4) continues to rotate α degrees to the third position, and the laser engraving part (3) marks the inner wall of the curved part (5); During the process of the contour jig (4) flipping from the second position to the third position, the linkage component (6) will drive the laser engraving part (3) to rotate synchronously. Spend; The rotation direction of the laser engraving part (3) is opposite to the rotation direction of the contour jig (4); The contouring fixture (4) includes a semi-circular seat (41), a circular cover (42), and a shaft (43). The semi-circular seat (41) and the circular cover (42) are fixedly installed. The semi-circular seat (41) is attached to the bottom surface of the curved part (5), and the circular cover (42) is attached to the top surface of the curved part (5). The shaft (43) is installed on the semi-circular seat (41) and is rotatably connected to the upper part of the worktable (1). The lifting assembly (2) includes a lifting part (21) and a mounting platform (22). The lifting part (21) is fixedly installed on the workbench (1), and the mounting platform (22) is installed on the lifting part (21). A base (71) is fixedly installed on the mounting platform (22), a central shaft (73) is rotatably connected to the base (71), a connector (72) is provided on the central shaft (73), and the laser engraving part (3) is fixedly installed on the connector (72); The linkage assembly (6) includes a drive shaft (61), a rotating sleeve (62), a linkage part (63), a plug (64), a light gear (65), a meshing section (66), and a full gear (68). The drive shaft (61) and the shaft rod (43) are fixedly installed. The rotating sleeve (62) is rotatably connected to the worktable (1). The rotating sleeve (62) and the drive shaft (61) are connected by the linkage part (63). The plug (64) is rotatably connected to the mounting table (22). The lower part of the plug (64) is slidably inserted into the rotating sleeve (62). The light gear (65) is fixedly installed on the upper part of the plug (64). The meshing section (66) is set on the light gear (65). The full gear (68) is fixedly installed on the central shaft (73). During the process of the contour jig (4) flipping from the first position to the second position, the drive unit (9) will drive the contour jig (4) to rotate. During the process of the contour jig (4) flipping from the second position to the third position, the meshing section (66) and the full gear (68) mesh. Under the linkage of the linkage component (6), the laser engraving part (3) will change its angle to increase the coverage area of ​​the laser head of the laser engraving part (3) on the inner sidewall of the curved part (5).

2. The laser engraving equipment for marking the surface of curved plastic parts according to claim 1, characterized in that, The value of α ranges from 1 to 30 degrees.

3. The laser engraving equipment for marking the surface of curved plastic parts according to claim 2, characterized in that, The drive unit (9) is fixedly installed on the workbench (1) and is used to drive the shaft (43) to rotate.

4. The laser engraving equipment for marking the surface of curved plastic parts according to claim 1, characterized in that, It also includes an elastic element (74), which is fixedly installed on the mounting platform (22), and the upper part of the elastic element (74) abuts against the laser engraving part (3).

5. A laser engraving device for marking the surface of curved plastic parts according to claim 1, characterized in that, It also includes a dust cover (8), which is placed outside the linkage assembly (6).

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