Printed circuit board (PCB) laser image engraving equipment

Abstract

The utility model discloses a PCB laser image marking device which comprises a support, a control system, a laser processing assembly, a bearing table, a driving mechanism and a clamping mechanism, and the clamping mechanism is composed of a positioning clamping unit and an adjustable clamping unit. The positioning unit is provided with an L-shaped sectional type positioning pressing plate, and is driven by a first driving piece to ascend and descend so as to realize PCB edge positioning; the adjustable unit comprises a strip-shaped guide hole, a sliding-type second driving piece and an adjustable pressing piece. The sliding block is provided with a holding part and an eccentric friction locking structure. The first driving piece and the second driving piece ascend and descend synchronously, vacuum adsorption is replaced with mechanical pressing, irreversible deformation of the thin PCB is effectively avoided, the device is suitable for PCBs of multiple sizes, the manufacturing cost and the maintenance burden of the device are reduced, and the precision and the machining stability of laser engraving are guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of circuit board processing technology, and in particular to a PCB laser image engraving device. Background Technology

[0002] PCB laser image marking equipment is mainly used to precisely mark the solder resist layer of PCBs using high-energy lasers, realizing the transfer of solder resist patterns and providing accurate positioning for subsequent soldering processes. It is a key piece of equipment in precision PCB manufacturing. Its structure mainly includes a support frame, a laser processing unit, a transmission and positioning system, and a control system. Among them, the clamping structure in the transmission and positioning system can effectively prevent the circuit board from shifting during processing, and is a core component to ensure processing stability.

[0003] Existing equipment mainly uses vacuum adsorption to fix the circuit board. However, the negative pressure of vacuum adsorption can easily cause irreversible deformation of thin PCBs (such as flexible FPCs and ultra-thin rigid boards), resulting in misalignment and dimensional deviation of the laser-engraved pattern. At the same time, the vacuum system needs to be equipped with a vacuum pump, vacuum pipeline and leakage detection components, which not only increases the equipment manufacturing cost and maintenance burden, but also the long-term repeated bending and dragging of the vacuum pipeline during the movement of the stage can easily lead to pipeline wear and loosening of the joints, which can cause vacuum leakage. Leakage will not only cause insufficient adsorption force, causing the PCB to shift during the engraving process, resulting in defects such as pattern misalignment and edge burrs, but also require frequent inspection and replacement of pipelines, increasing equipment maintenance costs and downtime. Utility Model Content

[0004] The main purpose of this utility model is to provide a PCB laser image engraving device, which aims to replace the existing vacuum adsorption clamping structure by setting up a mechanical clamping mechanism composed of a positioning clamping unit and an adjustable clamping unit, so as to avoid irreversible deformation of thin PCBs caused by negative pressure, and at the same time eliminate the vacuum system-related components to reduce equipment manufacturing costs and maintenance burden.

[0005] To achieve the above objectives, this utility model proposes a PCB laser image engraving device, including a support, a control system, a laser processing component, a carrier platform, and a drive mechanism mounted on the support and electrically connected to the control system; the carrier platform is mounted on the drive mechanism, and the laser processing component is positioned directly above the carrier platform; the drive mechanism is used to drive the carrier platform to adjust its displacement relative to the laser processing component; the carrier platform is equipped with a clamping mechanism, which includes a positioning clamping unit and an adjustable clamping unit;

[0006] The positioning and clamping unit includes an L-shaped positioning plate arranged in an L-shape along the upper edge of the support platform, a first through-shaft hole penetrating the support platform, and a first driving member arranged below the support platform; the output end of the first driving member is connected to a first driving shaft passing through the first through-shaft hole, and the first driving shaft is fixedly connected to the L-shaped positioning plate to drive the L-shaped positioning plate to rise and fall to achieve edge positioning and clamping of the PCB.

[0007] The adjustable clamping unit includes a plurality of strip-shaped guide holes opened along the length direction of the support platform, and a second driving member that is slidably mounted below the support platform and can slide linearly along the extension direction of the strip-shaped guide holes; the output end of the second driving member is connected to a second driving shaft passing through the strip-shaped guide holes, and the second driving shaft is fixedly connected to an adjustable pressure plate located above the support platform.

[0008] In one possible implementation, the positioning plate includes a horizontal part and a vertical part that are perpendicular to each other, and is formed by a plurality of fixed pressure plates. The plurality of fixed pressure plates are evenly spaced on the edge of the support platform and arranged in an L-shaped path. Each fixed pressure plate is provided with a first through-shaft hole and a first driving member.

[0009] In one possible implementation, the strip guide holes are provided in several groups, with two holes in each group. The two strip guide holes are perpendicular to each other and are respectively perpendicular to the horizontal part and the vertical part.

[0010] In one possible implementation, the second drive member is connected to the support platform via a sliding structure that matches the position of the strip guide hole.

[0011] In one possible implementation, the sliding structure includes a guide rail fixedly disposed at the bottom of the support platform and located on both sides of the strip-shaped guide hole, and a slider fixedly connected to the second driving member. The guide rail extends along the length direction of the strip-shaped guide hole, and a guide groove is provided on the side of the guide rail opposite to the strip-shaped guide hole. The slider is provided with a ball bearing structure that slides and engages with the guide groove on the side opposite to the guide groove.

[0012] In one possible implementation, the ball structure includes a mounting groove disposed on the side of the slider, the ball being slidably disposed in the mounting groove, and a return spring abutting between the mounting groove and the ball.

[0013] In one possible implementation, both the first and second driving components are lifting cylinders. Both the first and second driving components are connected to an external air source via air pipes, and a solenoid valve is connected in series on the air pipe. The solenoid valve is electrically connected to the control system of the equipment. The control system can drive the lifting cylinder to lift the fixed pressure plate and the positioning pressure plate by controlling the opening and closing of the solenoid valve.

[0014] In one possible implementation, the length of several sets of strip guide holes gradually shortens in the direction away from the positioning pressure plate.

[0015] In one possible implementation, the slider is provided with a gripping portion that passes through a strip-shaped guide hole and extends to an adjustable pressure plate, the gripping portion slidingly engaging with the strip-shaped guide hole.

[0016] In one possible implementation, the gripping part is cylindrical and rotatably connected to the slider; a locking structure is provided between the gripping part and the strip guide hole, the locking structure including a mounting sleeve fixedly disposed on the gripping part and coaxially disposed with the gripping part, a rubber friction block is sleeved on the mounting sleeve, the friction block is eccentrically disposed with the mounting sleeve and can be tightly attached to the inner wall of the strip guide hole.

[0017] Compared with the prior art, the beneficial effects of this application are as follows:

[0018] The positioning and clamping unit of its support platform adopts an L-shaped positioning pressure plate and a cooperative structure with the first driving component and the first through shaft hole. It replaces vacuum adsorption with mechanical clamping, which can effectively avoid irreversible deformation of thin PCBs caused by negative pressure, thereby ensuring the positional accuracy and dimensional consistency of laser-engraved patterns. At the same time, the L-shaped layout also provides a stable right-angle positioning reference for the PCB, ensuring consistent position in each processing.

[0019] In addition, the combination of the strip guide hole, the sliding second drive component, and the adjustable pressure plate in the adjustable clamping unit allows the adjustable pressure plate to slide flexibly along the guide hole with the second drive component, adapting to the clamping requirements of PCBs of different sizes and broadening the applicability of the equipment. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0022] Figure 2 This is a diagram of the internal structure of the present invention;

[0023] Figure 3 This is a schematic diagram of the drive mechanism of this utility model;

[0024] Figure 4 for Figure 3 Enlarged view at point A;

[0025] Figure 5 This is a structural diagram of the laser processing component of this utility model;

[0026] Figure 6 This is a partial structural diagram of the laser processing component of this utility model;

[0027] Figure 7 for Figure 6 Enlarged view at point B;

[0028] Figure 8 This is a structural diagram of the support platform of this utility model;

[0029] Figure 9 This is a bottom structural diagram of the support platform of this utility model;

[0030] Figure 10 This is an exploded view of the structure of the second driving component of this utility model;

[0031] Figure 11 This is a schematic diagram of the second driving component structure in Example 2;

[0032] Figure 12 This is a partial cross-sectional view of Example 2;

[0033] Explanation of icon numbers:

[0034] 100. Bracket; 200. Control system; 201. Human-machine interface touch screen; 300. Laser processing component; 301. Gantry; 302. Laser head; 303. CCD camera; 400. Drive mechanism; 401. X-axis linear motor; 402. Y-axis linear motor; 403. Sliding seat; 500. Support platform; 10. Positioning and clamping unit; 101. Positioning pressure plate; 102. First through-shaft hole; 103. First driving component; 11. Adjustable clamping unit; 111. Strip guide hole; 112. Second driving component; 113. Adjustable pressure plate; 2. Fixed pressure plate; 3. Sliding structure; 30. Guide rail; 31. Guide groove; 32. Mounting groove; 33. Ball bearing; 34. Return spring; 4. Air tube; 5. Grip part; 50. Mounting sleeve; 51. Friction block; 52. Slider.

[0035] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0037] Example 1

[0038] Reference Figures 1 to 10 This utility model proposes a PCB laser image engraving device, which includes a support 100, a control system 200, a laser processing component 300, a support platform 500, and a drive mechanism 400 installed on the support 100 and electrically connected to the control system 200; wherein, the laser processing component 300, the drive mechanism 400, and the control system 200 are all prior art.

[0039] like Figure 1-2 As shown, specifically, the support platform 500 is horizontally mounted on the drive mechanism 400, and the laser processing component 300 is fixedly arranged directly above the support platform 500. The drive mechanism 400 is used to drive the support platform 500 to make high-precision horizontal displacement relative to the laser processing component 300, so as to ensure that each area of ​​the PCB to be processed can be accurately aligned with the laser processing component 300.

[0040] A clamping mechanism for fixing PCBs is provided above the support platform 500. The clamping mechanism includes a positioning clamping unit 10 and an adjustable clamping unit 11. The positioning clamping unit 10 is arranged in an L-shape along the upper edge of the support platform 500 and consists of an L-shaped positioning pressure plate 101, a first through-shaft hole 102 penetrating the support platform 500, and a first driving member 103 arranged below the support platform 500. The output end of the first driving member 103 is connected to a first driving shaft passing through the first through-shaft hole 102. The top end of the first driving shaft is fixedly connected to the L-shaped positioning pressure plate 101.

[0041] The first driving component 103 can drive the L-shaped positioning plate 101 to move up and down, thereby achieving the positioning and clamping of the PCB edge and providing a stable reference for subsequent processing.

[0042] The adjustable clamping unit 11 includes several strip-shaped guide holes 111 opened along the length of the support platform 500, and a second drive member 112 slidably installed below the support platform 500. The second drive member 112 can slide linearly along the extension direction of the strip-shaped guide holes 111. Its output end is also connected to a second drive shaft passing through the strip-shaped guide holes 111. An adjustable pressure plate 113 located above the support platform 500 is fixed at the top of the second drive shaft. Both the first drive member 103 and the second drive member 112 are electrically connected to the control system 200. Through the adjustable clamping unit 11, the support platform 500 can push the second drive member 112 to adjust its position according to the specific size of the PCB. Then, the second drive member 112 can be activated to drive the adjustable pressure plate 113 to descend, thereby completing the clamping of the non-positioning edge of the PCB and adapting to the fixing requirements of PCBs of different specifications.

[0043] The positioning clamping unit 10 and the adjustable clamping unit 11 achieve synchronous lifting and lowering through the linkage control of the control system 200. This ensures the consistency of the PCB edge positioning and non-positioning edge clamping actions, avoids PCB displacement caused by unilateral force, and also allows for synchronous lifting during release, improving material handling efficiency and adapting to the fixing requirements of PCBs of different specifications.

[0044] like Figure 3-4 As shown, the drive mechanism 400 adopts an XY axis linear motor 402 module, which consists of a Y-axis linear motor 402, an X-axis linear motor 401, and a sliding base. The Y-axis linear motor 402 is fixedly mounted on the horizontal bearing surface of the bracket 100. The X-axis linear motor 401 is fixedly connected to the mover of the Y-axis linear motor 402 through the sliding base 403. The bearing platform 500 is fastened to the top of the mover of the X-axis linear motor 401. A sliding base 403 is also provided on the top of the mover of the X-axis linear motor 401. The bearing platform 500 is fixedly connected to the X-axis linear motor 401 through the sliding base 403.

[0045] The X-axis linear motor 401 and the Y-axis linear motor 402 are arranged perpendicularly to each other and are both electrically connected to the control system 200. During operation, the control system 200 controls the movement trajectory of the linear motor actuators by outputting pulse signals, driving the support platform 500 to perform non-contact, high-precision displacement along the two vertical directions of the X and Y axes. This not only provides a fast response speed but also effectively reduces positioning errors, ensuring that the processing path of the PCB driven by the support platform 500 and the laser processing component 300 is precisely matched.

[0046] like Figure 5-6 As shown, the laser processing assembly 300 includes a gantry 301, a plurality of laser heads 302, and a galvanometer adjustment mechanism and a CCD camera 303 corresponding to each laser head 302. The gantry 301 is fixed on the top of the support 100 and faces the support platform 500. The plurality of laser heads 302 are evenly arranged along the gantry 301. Each laser head 302 is equipped with a laser generator and a focusing lens group. The high-energy laser beam generated by the laser generator is focused by the focusing lens group and can be accurately projected onto the PCB surface to be processed.

[0047] The galvanometer adjustment mechanism is linked with the laser head 302, and can adjust the spot size of the laser head 302 in real time according to the processing requirements to meet the size requirements of different marking positions. The CCD camera 303 corresponds one-to-one with the laser head 302 and is fixed to the side of the laser head 302. It can identify the marking points on the PCB before processing and complete the precise positioning of the PCB in conjunction with the control system 200. It can also acquire images of the processed area in real time during the marking process to achieve synchronous defect detection.

[0048] The laser generator, galvanometer adjustment mechanism, and CCD camera 303 are all electrically connected to the control system 200 to ensure coordinated control of laser output, spot adjustment, image acquisition, and detection. The gantry 301 can also finely adjust its height to adapt to the processing needs of PCBs of different thicknesses.

[0049] The control system 200 uses an industrial-grade PLC or embedded industrial controller as the main control core, and is equipped with a digital input / output module, a pulse output module, a communication module, and a human-machine interface touch screen 201. The pulse output module is used to precisely control the displacement speed and stroke of the XY axis linear motor 402. The digital input / output module is responsible for receiving image signals from the CCD camera 303 and controlling the start, stop, and synchronous action of the first drive unit 103 and the second drive unit 112. The communication module establishes bidirectional data transmission with the laser processing component 300, CCD camera 303, and other devices via Ethernet or serial port to ensure the real-time nature of command issuance and data feedback. The human-machine interface touch screen 201 provides operators with a visual operating interface, supporting functions such as drawing import, processing parameter setting, processing path preview, equipment operation status monitoring, and fault alarm prompts.

[0050] Furthermore, such as Figure 8-10 As shown, the clamping mechanism is the core improvement unit of this application, which specifically includes a positioning clamping unit 10 and an adjustable clamping unit 11. The two work together to achieve stable and precise clamping of PCBs of different specifications.

[0051] The positioning and clamping unit 10 is arranged in an L-shape along the upper edge of the support platform 500. It mainly consists of an L-shaped positioning plate 101, a first through-shaft hole 102 that passes through the support platform 500, and a first driving member 103 arranged below the support platform 500. The output end of the first driving member 103 is connected to a first driving shaft that passes through the first through-shaft hole 102. The top end of the first driving shaft is fixedly connected to the L-shaped positioning plate 101. The L-shaped positioning plate 101 is lifted up and down by the drive of the first driving member 103, thereby completing the positioning and clamping of the PCB edge.

[0052] To accommodate irregularly shaped PCBs and local positioning requirements, the L-shaped positioning plate 101 consists of several fixed pressure plates 2. These fixed pressure plates 2 are evenly spaced along the edge of the support platform 500 and arranged in an L-shaped path. Each fixed pressure plate 2 is equipped with an independent first through-shaft hole 102 and a first driving component 103. The fixed pressure plate 2 at the corresponding position can be selectively activated according to actual needs. All activated first driving components 103 can move up and down synchronously with the second driving component 112, which ensures the stability of the reference positioning and avoids excessive compression or uneven force on the PCB.

[0053] And such Figure 8-9As shown, the adjustable clamping unit 11 includes a number of strip-shaped guide holes 111 opened along the length direction of the support platform 500, and a second drive member 112 slidably installed below the support platform 500. The output end of the second drive member 112 is connected to a second drive shaft passing through the strip-shaped guide holes 111, and an adjustable pressure plate 113 located above the support platform 500 is fixed at the top end of the second drive shaft.

[0054] Each set of strip-shaped guide holes 111 has two holes that are perpendicular to each other, perpendicular to the horizontal and vertical parts of the positioning plate 101 respectively. This allows the adjustable pressure plate 113 to be flexibly adjusted in both the X and Y vertical directions to accommodate PCBs of different lengths and widths. At the same time, the length of the strip-shaped guide holes 111 gradually shortens towards the direction away from the positioning plate 101. The longer guide holes closer to the reference end provide a larger adjustment range, while the shorter guide holes further away from the reference end optimize the spatial layout of the support platform 500 and avoid unnecessary structural occupation.

[0055] The second driving component 112 is connected to the support platform 500 via a sliding structure 3. The sliding structure 3 is precisely matched with the strip guide hole 111. It mainly consists of guide rails 30 fixed to the bottom of the support platform 500 and located on both sides of the strip guide hole 111, and sliders 52 fixedly connected to the second driving component 112. The guide rails 30 extend along the length of the strip guide hole 111 and have guide grooves 31 on their sides. A ball bearing structure 33 is installed on one side of the slider 52 corresponding to the guide groove 31. The ball bearing 33 is installed in the mounting groove 32 on the side of the slider 52. A return spring 34 abuts between the mounting groove 32 and the ball bearing 33. The return spring 34 always presses the ball bearing 33 tightly against the inner wall of the guide groove 31, effectively eliminating sliding gaps and converting sliding friction into rolling friction, making the sliding of the second driving component 112 smoother and more precise, avoiding jamming or deviation during adjustment, and ensuring that it can rise and fall precisely and synchronously with the first driving component 103 after adjustment.

[0056] Both the first drive unit 103 and the second drive unit 112 use lifting cylinders and are connected to an external air source through an air pipe 4. A solenoid valve is connected in series on the air pipe 4 and is electrically connected to the control system 200. The air pipe 4 includes a rigid pipe connected to the first drive unit 103 and a flexible pipe connected to the second drive unit 112. The flexible pipe ensures that there will be no interference at the connection point of the second drive unit 112 during the sliding adjustment process. After the operator sends a command through the control system 200, the solenoid valve will synchronously control the air supply to the first drive unit 103 and the second drive unit 112, causing the positioning pressure plate 101 and the adjustable pressure plate 113 to descend and press the PCB at the same time, or rise and release the PCB at the same time. This ensures that the PCB is clamped with uniform force, avoiding deformation or displacement caused by unilateral force, and also improves the continuity and efficiency of picking and placing materials, perfectly meeting the automated collaborative operation requirements of laser engraving.

[0057] Example 2

[0058] like Figure 11-12 Based on Embodiment 1, in order to further improve the ease of operation and stability of the adjusted position of the adjustable clamping unit 11, its structure has been specifically optimized. Specifically, a gripping part 5 is added to the slider 52, and a locking structure is provided accordingly.

[0059] The grip 5 is cylindrical, with one end rotatably connected to the slider 52 and the other end extending through the strip guide hole 111 to the adjustable pressure plate 113 above the support platform 500. This does not affect the lifting and lowering of the adjustable pressure plate 113, and allows the operator to grip and operate directly above the support platform 500 without having to bend down to contact the second drive component 112 below the support platform 500. The view is intuitive and there is ample operating space. It is easier to push and can accurately drive the slider 52 to slide along the guide rail 30 and the strip guide hole 111. Combined with the original ball bearing 33 structure, it further ensures the accuracy of the adjustment direction.

[0060] The locking structure is located between the gripping part 5 and the strip-shaped guide hole 111, including a mounting sleeve 50 coaxially fixed to the gripping part 5. A rubber friction block 51 is fitted on the mounting sleeve 50, and the friction block 51 is eccentrically positioned with respect to the mounting sleeve 50. When the operator adjusts the adjustable pressure plate 113 to the position suitable for the PCB, simply rotate the gripping part 5 to rotate the mounting sleeve 50 synchronously. The eccentrically positioned friction block 51 will gradually fit tightly against the inner wall of the strip-shaped guide hole 111. The high friction and elastic deformation of the rubber material are used to lock the position, firmly fixing the second driving component 112 and preventing the adjustable pressure plate 113 from shifting due to vibration during equipment operation or processing. When the position needs to be adjusted again, rotating the gripping part 5 in the opposite direction will reduce the contact pressure between the friction block 51 and the inner wall of the guide hole, and after unlocking, it can be smoothly slidably adjusted. The rubber friction block 51 is soft and will not scratch the inner wall of the strip guide hole 111 during locking, thus protecting the precision of the guide structure. At the same time, the locking tightness can be flexibly adjusted according to actual needs, taking into account both the reliability of fixation and the flexibility of operation.

[0061] This optimized structure is perfectly compatible with the original sliding structure 3 and synchronous lifting drive design. The locking structure only restricts the horizontal sliding displacement of the second drive component 112 and does not affect the synchronous lifting action of the first drive component 103 and the second drive component 112. While ensuring that the PCB is subjected to uniform force during clamping, it makes the position adjustment of the adjustable pressure plate 113 more convenient and the fixation more secure, further adapting to the needs of rapid changeover and stable processing of multi-specification PCBs.

[0062] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0063] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A PCB laser image engraving device, comprising a support (100), a control system (200), and a laser processing assembly (300), a bearing table (500), a driving mechanism (400) installed on the support (100) and electrically connected with the control system (200); characterized in that: The bearing table (500) is carried on the driving mechanism (400), and the laser processing assembly (300) is arranged above the bearing table (500); the driving mechanism (400) is used for driving the bearing table (500) to displace and adjust relative to the laser processing assembly (300); the bearing table (500) is provided with a clamping mechanism, and the clamping mechanism comprises a positioning clamping unit (10) and an adjustable clamping unit (11); The positioning clamping unit (10) comprises an L-shaped positioning pressing plate (101) arranged in an L shape along the upper edge of the bearing table (500), a first shaft hole (102) penetrating through the bearing table (500), and a first driving member (103) arranged below the bearing table (500); the output end of the first driving member (103) is connected with a first driving shaft penetrating through the first shaft hole (102), and the first driving shaft is fixedly connected with the L-shaped positioning pressing plate (101) to drive the L-shaped positioning pressing plate (101) to lift and lower, so that the edge of the PCB is positioned and pressed tightly; The adjustable clamping unit (11) comprises a plurality of strip-shaped guide holes (111) opened along the length direction of the bearing table (500), and a second driving member (112) slidably arranged below the bearing table (500) and capable of linearly sliding along the extension direction of the strip-shaped guide hole (111); the output end of the second driving member (112) is connected with a second driving shaft penetrating through the strip-shaped guide hole (111), and the second driving shaft is fixedly connected with an adjustable pressing piece (113) located above the bearing table (500).

2. The PCB laser image engraving apparatus according to claim 1, wherein, The positioning pressing plate (101) comprises a horizontal part and a vertical part perpendicular to each other, which are formed by a plurality of fixed pressing pieces (2); the plurality of fixed pressing pieces (2) are distributed at equal intervals and arranged in an L-shaped path on the edge of the bearing table (500); each fixed pressing piece (2) is provided with a first shaft hole (102) and a first driving member (103).

3. The PCB laser image engraving apparatus of claim 2, wherein, The strip-shaped guide hole (111) is provided with a plurality of groups, each group is provided with two strip-shaped guide holes (111), and the two strip-shaped guide holes (111) are perpendicular to each other and are arranged vertically with the horizontal part and the vertical part.

4. The PCB laser image engraving apparatus according to claim 3, wherein, The second driving member (112) and the bearing table (500) are connected through a sliding structure (3), and the sliding structure (3) is matched with the strip-shaped guide hole (111) in position.

5. The PCB laser image engraving apparatus of claim 4, wherein, The sliding structure (3) comprises a guide rail (30) fixedly arranged on the bottom of the bearing table (500) and located on both sides of the strip-shaped guide hole (111), and a sliding block (52) fixedly connected with the second driving member (112); the guide rail (30) extends along the length direction of the strip-shaped guide hole (111), and one side of the guide rail (30) relative to the strip-shaped guide hole (111) is provided with a guide groove (31); the sliding block (52) is rotatably provided with a ball (33) structure in sliding cooperation with the guide groove (31) on one side of the guide groove (31).

6. The PCB laser image engraving apparatus of claim 5, wherein, The ball (33) structure comprises a mounting groove (32) arranged on the side surface of the sliding block (52), and the ball (33) is slidably arranged in the mounting groove (32); a reset spring (34) is arranged between the mounting groove (32) and the ball (33).

7. The PCB laser image engraving apparatus of claim 6, wherein, The first driving member (103) and the second driving member (112) are both lifting cylinders, the first driving member (103) and the second driving member (112) are both communicated with an external air source through an air pipe (4), and an electromagnetic valve is connected in series on the air pipe (4), the electromagnetic valve is electrically connected with a control system (200) of the equipment, and the control system (200) can drive the lifting cylinders to drive the fixed tablet pressing plate (2) and the positioning tablet pressing plate to lift by controlling the on-off of the electromagnetic valve.

8. The PCB laser image engraving apparatus of claim 7, wherein, The lengths of the plurality of groups of strip-shaped guide holes (111) gradually shorten away from the positioning pressing plate (101).

9. The PCB laser image engraving apparatus of claim 7, wherein, The sliding block (52) is provided with a holding portion (5) extending to the adjustable tablet pressing plate (113) through the strip-shaped guide hole (111), and the holding portion (5) is in sliding fit with the strip-shaped guide hole (111).

10. The PCB laser image engraving apparatus of claim 9, wherein, The holding portion (5) is in rotational connection with the sliding block (52) and is in cylindrical shape, a locking structure is arranged between the holding portion (5) and the strip-shaped guide hole (111), the locking structure comprises a mounting sleeve (50) fixedly arranged on the holding portion (5) and coaxially arranged with the holding portion (5), a friction block (51) made of rubber is sleeved on the mounting sleeve (50), the friction block (51) and the mounting sleeve (50) are eccentrically arranged and can be tightly attached to the inner wall of the strip-shaped guide hole (111).

Images