Precise cutting laser head for PCB (Printed Circuit Board)

Abstract

The utility model relates to a laser head, in particular to a precise cutting laser head for a printed circuit board (PCB). The precise cutting laser head for the PCB comprises a shell I, a shell II, an angle control motor and the like, a second shell is rotatably arranged on the front portion of the first shell, and an angle control motor is fixedly arranged on the inner side of the first shell. When a PCB is cut, the installation direction of the laser head is adjusted according to needs, by arranging the laser head capable of being rotatably adjusted, when the PCB is placed through a machining platform or a clamp, the orientation of the surface of the PCB is not limited to one direction, and therefore the PCB can be conveniently machined. According to the PCB cutting device, PCBs placed at different angles and PCBs in different shapes can be cut, during use, the application range is wider, use scenes are more, meanwhile, when the PCBs with the smooth surfaces are machined, through slight angle rotation of the laser head, the laser incident angle is more appropriate, laser reflection is reduced, laser beam loss is reduced, and the cutting efficiency is improved.

Description

Technical Field

[0001] The utility model relates to a laser head, in particular to a precision cutting laser head for PCB boards. Background Art

[0002] Laser cutting of PCB boards has the advantages of high precision, narrow cut width, smooth cutting surface, and being unaffected by the shape of the PCB board during cutting, enabling special-shaped cutting. In the PCB processing operation of cutting, laser cutting is gradually replacing conventional mechanical cutting equipment.

[0003] For a conventional laser cutting head, through an externally connected X-axis and Y-axis transmission device and a preset program during laser cutting, the laser head is driven by the transmission device to achieve positioning movement at any point within a frame surface. Through the emitted laser beam, the required pattern is cut on the PCB board placed on the processing platform. However, the conventional laser head cannot automatically adjust the angle, and the laser beam can only be emitted in the direction of the installation angle of the laser head. The PCB board needs to be placed flat. When there are special-shaped boards with different bending angles on the board surface or the PCB board installed in the fixture is tilted, manual intervention is required in a timely manner to adjust the angle of the laser head or the PCB board in the fixture. Otherwise, cutting errors will occur, affecting the processing quality of the PCB board. Summary of the Utility Model

[0004] In order to overcome the shortcomings of the conventional laser head that cannot automatically adjust the angle, the laser beam can only be emitted in the direction of the installation angle of the laser head, the PCB board needs to be placed flat, when there are special-shaped boards with different bending angles on the board surface or the PCB board installed in the fixture is tilted, manual intervention is required in a timely manner to adjust the angle of the laser head or the PCB board in the fixture. Otherwise, cutting errors will occur, affecting the processing quality of the PCB board, the purpose is to provide a precision cutting laser head for PCB boards with an automatically adjustable angle of the laser head. When using a processing platform or fixture to place the PCB board, the orientation of the PCB board surface is not limited to one direction, and it can realize cutting of PCB boards placed at different angles and different shapes of PCB boards. When in use, it has a wider range of uses and more usage scenarios.

[0005] The technical solution is as follows: A precision cutting laser head for PCB boards includes a first housing, a second housing, an angle control motor, a laser generator, a lens barrel, a collimating lens, a first focusing lens, a cutting head, and an objective lens. The second housing is rotatably provided at the front part of the first housing. The angle control motor is fixedly provided inside the first housing, and the output shaft of the angle control motor is fixedly connected to the second housing. The laser generator is fixedly installed at the rear side inside the second housing. The lower part of the laser generator is connected and communicated with the lens barrel. The upper part of the lens barrel penetrates into the inside of the second housing. The collimating lens is fixedly connected to the upper side inside the lens barrel. The first focusing lens is fixedly connected to the upper part inside the lens barrel near the collimating lens. The lower part of the lens barrel is fixedly connected and communicated with the cutting head, and the objective lens is fixedly connected to the upper part of the cutting head.

[0006] Preferably, it further includes a frame, an adjusting frame, a first transmission member, and a second focusing lens. The adjusting frame is slidably provided at the lower part inside the lens barrel. The second focusing lens is fixedly connected inside the adjusting frame. A guiding groove is formed at the lower right part of the lens barrel. The right part of the adjusting frame slides up and down in the guiding groove. The lower part of the second housing is fixedly welded with the frame. The first transmission member is installed at the right part of the frame. The first transmission member is composed of a transmission motor and a lead screw. The right part of the adjusting frame is screwed with the lead screw of the transmission member.

[0007] Preferably, it further includes a mounting base, a guide rail, and a second transmission member. The guide rail is slidably provided at the rear part of the first housing. The mounting base is fixedly connected to the rear part of the guide rail. The second transmission member is provided inside the guide rail. The second transmission member is composed of a motor and a transmission lead screw. The transmission lead screw is threadedly connected to the upper side of the rear part of the second housing.

[0008] Preferably, it further includes a rod sleeve, a telescopic rod, and an adjusting seat. The rod sleeve is fixedly connected to the lower left part of the frame. The telescopic rod is slidably and rotatably provided inside the rod sleeve. The left end of the telescopic rod is connected with the adjusting seat.

[0009] Preferably, it further includes a baffle. The baffle is fixedly connected to the right part of the adjusting frame. The baffle is in sliding contact with the lens barrel and always covers the guiding groove.

[0010] Preferably, it further includes a shielding cover. The shielding cover is fixedly connected to the rear part inside the second housing. The shielding cover completely covers the laser generator.

[0011] Preferably, it further includes a cushion block. The cushion block is provided at the rear part of the mounting base.

[0012] The beneficial effects of the present utility model are as follows: When cutting a PCB board, the present utility model adjusts the installation direction of the laser head according to requirements. By providing a rotatable and adjustable laser head, when placing the PCB board using a processing platform or fixture, the orientation of the PCB board surface is not limited to one direction, and it can realize cutting of PCB boards placed at different angles and of different shapes. When in use, it has a wider range of uses and more usage scenarios. At the same time, when processing a PCB board with a smooth surface, by slightly rotating the angle of the laser head, the laser incident angle is made more appropriate, reducing laser reflection, reducing the loss of the laser beam, and improving the cutting efficiency.

[0013] By providing a second focusing lens that can move up and down, the present utility model realizes that during cutting, according to the distance between the object and the laser head, rapid automatic focusing of the light beam is achieved, and the laser cutting equipment can be automatically focused on the target in real time. For PCB boards made of different materials and with different thicknesses, the laser focus can be quickly adjusted to the most appropriate position automatically without manual intervention to adjust the beam zoom, significantly improving the processing efficiency of the laser cutting machine. Description of the Drawings

[0014] Figure 1 This is a three-dimensional structural schematic diagram of the present utility model.

[0015] Figure 2 This is a three-dimensional structural schematic diagram of components such as the second housing, frame, and adjustment frame of the present utility model.

[0016] Figure 3 This is a three-dimensional structural schematic diagram of components such as the second housing, angle control motor, and laser generator of the present utility model.

[0017] Figure 4 This is a cross-sectional view of components such as the laser generator and lens barrel of the present utility model.

[0018] Figure 5 This is a cross-sectional view of components such as the adjustment frame, first transmission member, and second focusing lens of the present utility model.

[0019] Figure 6 This is a three-dimensional structural schematic diagram of components such as the mounting base, cushion block, and guide rail of the present utility model.

[0020] Explanation of reference numerals: 1 - First housing, 2 - Second housing, 3 - Angle control motor, 4 - Laser generator, 5 - Lens barrel, 51 - Collimating lens, 52 - First focusing lens, 53 - Cutting head, 54 - Object lens, 6 - Shielding cover, 7 - Frame, 8 - Adjustment frame, 9 - First transmission member, 10 - Baffle, 11 - Second focusing lens, 12 - Rod sleeve, 121 - Telescopic rod, 122 - Adjustment seat, 13 - Mounting base, 131 - Cushion block, 14 - Guide rail, 15 - Second transmission member. Detailed implementation manners

[0021] The present utility model will be further described below in conjunction with the accompanying drawings and specific implementation manners.

[0022] Embodiment 1: A precision cutting laser head for PCB boards, as Figures 1-6As shown in the figure, it includes housing 1, housing 2, angle control motor 3, laser generator 4, lens barrel 5, collimating lens 51, first focusing lens 52, cutting head 53 and objective lens 54. Housing 1 is made of alloy material and customized according to the size and shape of the laser head. Housing 2 made of alloy material is rotatably arranged at the front part of housing 1. The control module and positioning module of the laser head should be arranged inside housing 2 and are signal interconnected with other output components installed on the laser head. Angle control motor 3 for automatically adjusting the angle of the output shaft according to the signal fed back by the positioning module inside the laser head is fixedly arranged inside housing 1. The output shaft of angle control motor 3 is fixedly connected to housing 2 to drive housing 2 to rotate. Laser generator 4 is fixedly installed at the rear side inside housing 2. Laser beam can be generated by electrical components inside laser generator 4. Mirror barrel 5 is connected and communicated with the lower part of laser generator 4. The upper part of mirror barrel 5 penetrates into the inside of housing 2. The beam inside laser generator 4 will shoot downward and enter mirror barrel 5. Collimating lens 51 for collimating the beam and making the beam shoot horizontally is fixedly connected to the upper side inside mirror barrel 5. First focusing lens 52 for focusing light and reducing light scattering loss is fixedly connected to the upper part inside mirror barrel 5 near collimating lens 51. Cutting head 53 is fixedly connected and communicated with the lower part of mirror barrel 5. The lower part of cutting head 53 is tapered for the purpose of reducing the area of external light entering. The emitted laser ray will pass through objective lens 54 fixedly connected to the upper part of cutting head 53 and shoot out of cutting head 53 downward. Objective lens 54 is used to separate mirror barrel 5 from the outside world.

[0023] Place the PCB board to be cut under the laser head. The laser head is externally connected with a transmission component at the cutting station to drive the laser head to achieve precise positioning movement within a specific range. The positioning module inside the laser head consists of a vision module and a distance module. According to the signal fed back by the positioning module, the control module drives the transmission component to position and cut the PCB board. Under the action of the positioning module and angle control motor 3, the laser head will rotate the directions of housing 2 and mirror barrel 5 according to the PCB board placed at different angles and the PCB board with different shapes, and adjust the direction of the cutting ray in real time. By setting a rotatable and adjustable laser head, when using a processing platform or fixture to place the PCB board, the orientation of the PCB board surface is not limited to one direction, and it is possible to cut PCB boards placed at different angles and with different shapes. When in use, it has a wider range of uses and more usage scenarios. At the same time, when processing a PCB board with a smooth surface, the laser head will slightly rotate under the drive of angle control motor 3 to make the incident angle of the laser beam on the PCB board more appropriate, reduce laser reflection, reduce the loss of the laser beam, and improve the cutting efficiency.

[0024] Example 2: On the basis of Example 1, as Figures 1-5As shown in the figure, it further includes a frame 7, an adjusting frame 8, a first transmission member 9, and a second focusing lens 11. A guiding groove is formed on the lower side of the right part of the lens barrel 5. The lower part inside the lens barrel 5 is slidably provided with an adjusting frame 8. The adjusting frame 8 is composed of a mounting ring that slides inside the lens barrel 5 and is concentric with the lens barrel 5, and a connecting block that slides in the guiding groove. The inner side of the mounting ring of the adjusting frame 8 is fixedly connected with the second focusing lens 11. The second focusing lens 11 is used to zoom in on the light spot after the light is emitted, adjust the size of the light spot. The right part of the adjusting frame 8 slides up and down in the guiding groove, driving the second focusing lens 11 to slide up and down. The diameter of the light beam passing through the second focusing lens 11 is affected by the distance between the second focusing lens 11 and the first focusing lens. A frame 7 is fixedly welded to the lower part of the second housing 2. A first transmission member 9 is installed on the right part of the frame 7. The first transmission member 9 is composed of a transmission motor and a lead screw. The connecting block on the right part of the adjusting frame 8 is screwed onto the lead screw of the first transmission member 9. The transmission motor is connected to the positioning module and the signal module inside the laser head. Through the signal output by the control module, the position of the second focusing lens 11 inside the lens barrel is automatically adjusted, thereby adjusting the size of the light spot after the emitted light is focused. When cutting PCB boards of different shapes and angles, the light spot focus can be quickly adjusted to the most suitable position.

[0025] As Figure 4 shown in the figure, it further includes a baffle 10. The right part of the adjusting frame 8 is fixedly connected with a baffle 10. The baffle 10 is in sliding contact with the lens barrel 5. The baffle 10 moves up and down with the connecting block of the adjusting frame 8 and is always in a state of covering the guiding groove, preventing external light and foreign matters from flowing into the lens barrel 5 and interfering with the emitted laser beam, so that the laser beam remains in an ideal state during the transmission and focusing process in the optical system.

[0026] In a preferred embodiment: it further includes a mounting base 13, a guide rail 14, and a second transmission member 15. The rear part of the first housing 1 is slidably provided with a guide rail 14. The rear part of the guide rail 14 is fixedly connected with a mounting base 13. A second transmission member 15 is arranged inside the guide rail 14. The second transmission member 15 is composed of a motor and a transmission lead screw. The transmission lead screw is in threaded connection with the upper side of the rear part of the second housing 2. Driven by the second transmission member 15, the overall laser head component slides up and down on the guide rail 14. The purpose of arranging the guide rail 14 and the second transmission member 15 is: during laser cutting, the position between the laser head and the PCB board is adjusted in real time through the second transmission member 15. During processing, in cooperation with the angle control motor 3, the distance between the laser head and the PCB board is controlled to be the optimal processing distance.

[0027] In a preferred embodiment: As Figures 1-2As shown, it further includes a rod sleeve 12, a telescopic rod 121 and an adjustment seat 122. A rod sleeve 12 is fixedly connected to the lower left side of the frame 7. The length of the rod sleeve is customized according to needs. A telescopic rod 121 is slidably and rotatably arranged inside the rod sleeve 12. The damping between the telescopic rod 121 and the rod sleeve 12 is relatively large. When rotating and pulling the telescopic rod, a certain amount of force is required. The left end of the telescopic rod 121 is connected to an adjustment seat 122. The adjustment seat 122 is composed of a rotating block and a mounting plate surface. Detection equipment or auxiliary processing equipment, such as a temperature and humidity detector and a laser reflection device, is installed on the mounting plate surface of the adjustment seat 122. By cooperating with the externally connected processing equipment through the installed and connected auxiliary devices, the environment of the laser beam at the cutting station during processing is optimized.

[0028] In a preferred embodiment: As Figure 3 shown, it further includes a shielding cover 6. A shielding cover 6 is fixedly connected to the rear part inside the housing two 2. The shielding cover 6 completely covers the laser generator 4. The shielding cover 6 can effectively prevent the interference of external electric fields, magnetic fields or electromagnetic fields on the working state of the laser generator 4 and ensure the stability of the output light.

[0029] In a preferred embodiment: As Figure 1 and Figure 6 shown, it further includes a cushion block 131. A rubber cushion block 131 is provided at the rear part of the mounting base 13. After the laser head is fixedly installed, it is used to buffer the vibration generated during the movement of the power components connected to the laser head during operation, and reduce the overall unstable state during the mechanical movement of the laser head, thereby preventing the situation where the cutting is affected.

[0030] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that these embodiments can be changed without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A precision cutting laser head for a PCB board, comprising a first housing (1), a second housing (2) and an angle control motor (3). The second housing (2) is rotatably provided at the front of the first housing (1). The angle control motor (3) is fixedly provided inside the first housing (1), and the output shaft of the angle control motor (3) is fixedly connected to the second housing (2). It is characterized in that It further comprises a laser generator (4), a lens barrel (5), a collimating lens (51), a first focusing lens (52), a cutting head (53) and an objective lens (54). The laser generator (4) is fixedly installed at the rear side inside the second housing (2). The lower part of the laser generator (4) is connected and communicated with the lens barrel (5). The upper part of the lens barrel (5) penetrates into the inside of the second housing (2). The collimating lens (51) is fixedly connected to the upper side inside the lens barrel (5). The first focusing lens (52) is fixedly connected to one side of the upper part inside the lens barrel (5) close to the collimating lens (51). The lower part of the lens barrel (5) is fixedly connected and communicated with the cutting head (53). The objective lens (54) is fixedly connected to the upper part of the cutting head (53).

2. The precision cutting laser head for a PCB board according to claim 1, wherein It further comprises a frame (7), an adjusting frame (8), a first transmission member (9) and a second focusing lens (11). The adjusting frame (8) is slidably provided at the lower part inside the lens barrel (5). The second focusing lens (11) is fixedly connected to the inside of the adjusting frame (8). A guiding groove is formed at the lower right side of the lens barrel (5). The right part of the adjusting frame (8) slides up and down in the guiding groove. The frame (7) is fixedly welded to the lower part of the second housing (2). The first transmission member (9) is installed at the right part of the frame (7). The first transmission member (9) consists of a transmission motor and a lead screw. The right part of the adjusting frame (8) is screwed to the lead screw of the transmission member.

3. The precision cutting laser head for a PCB board according to claim 2, wherein, It further comprises a mounting base (13), a guide rail (14) and a second transmission member (15). The guide rail (14) is slidably provided at the rear part of the first housing (1). The mounting base (13) is fixedly connected to the rear part of the guide rail (14). The second transmission member (15) is provided inside the guide rail (14). The second transmission member (15) consists of a motor and a transmission lead screw. The transmission lead screw is threadedly connected to the upper side of the rear part of the second housing (2).

4. A precision cutting laser head for a PCB board according to claim 3, characterized in that, It further comprises a rod sleeve (12), a telescopic rod (121) and an adjusting seat (122). The rod sleeve (12) is fixedly connected to the lower left side of the frame (7). The telescopic rod (121) is slidably and rotatably provided inside the rod sleeve (12). The left end of the telescopic rod (121) is connected to the adjusting seat (122).

5. The precision cutting laser head for a PCB board according to claim 4, wherein It further comprises a baffle (10). The baffle (10) is fixedly connected to the right part of the adjusting frame (8). The baffle (10) is in sliding contact with the lens barrel (5) and always covers the guiding groove.

6. A precision cutting laser head for a PCB board according to claim 5, characterized in that, It further comprises a shielding cover (6). The shielding cover (6) is fixedly connected to the rear part inside the second housing (2). The shielding cover (6) completely covers the laser generator (4).

7. A precision cutting laser head for a PCB board according to claim 6, characterized in that, It further comprises a cushion block (131). The cushion block (131) is provided at the rear part of the mounting base (13).

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