Laser datum line alignment calibration equipment for printing registration

Abstract

The invention discloses laser datum line alignment calibration equipment for printing registration, and relates to the technical field of laser instrument calibration. Comprising a mounting table, a suspension mounting mechanism is arranged at the top of the mounting table and used for reducing vibration conduction during operation of the printing equipment, and a linear adjusting mechanism is mounted on the bottom wall of the mounting table. The defects that a traditional lead screw sliding block has a residual gap and is prone to being affected by vibration to move are overcome in a targeted mode, a triangular locking piece can convert transverse vibration force into longitudinal compression force, and it is guaranteed that the locking piece is accurately embedded into a locking groove to achieve mechanical locking in cooperation with limiting guiding of a lug block and a lug groove. After the electromagnet is powered on, secondary fixing is formed through attraction force to be tightly attached to the locking piece and the inner wall of the locking groove, residual gaps are thoroughly eliminated, the double locking enables the position precision and the anti-vibration stability of the laser emitting device to be higher, and it is guaranteed that a datum line is accurate and stable in the whole printing process.

Description

Technical Field

[0001] This invention relates to the field of laser instrument calibration technology, specifically to a laser reference line alignment calibration device for printing registration. Background Technology

[0002] Laser registration alignment equipment is a specialized laser technology device used in multi-color printing processes to ensure precise alignment of different color printing plates. Its core function is to utilize the high directionality and high precision of lasers to provide a precise reference line for registration alignment. In multi-color printing processes (offset, flexographic, gravure, etc.), it emits a high-precision laser reference line / plane as an alignment reference for each printing color group's printing plate and substrate. It detects and calibrates the registration deviation between different color plates in real time, ensuring that the color patterns of the final printed product accurately match and meet printing accuracy requirements.

[0003] Regarding the aforementioned technologies, it is believed that: when adjusting the position of the laser emitter head, the current equipment uses a lead screw in the transmission mechanism to adjust its precision, and controls the linear movement of the laser emitter head to adjust the alignment reference according to the printing specifications; After the laser emitter position is adjusted, slight vibrations during continuous operation of the printing press can affect the laser emitter, causing movement in the transmission gap between the slider and the lead screw. This can lead to a slight shift in the laser head position, resulting in baseline drift and decreased registration accuracy. Therefore, it is necessary to design a device that locks the position of the laser emitter after adjustment to improve calibration accuracy, in order to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide a laser reference line alignment calibration device for printing registration, which solves the problems mentioned in the background art.

[0005] To achieve this objective, the present invention adopts the following technical solution: A laser reference line alignment calibration device for printing registration includes a mounting platform. A suspension mounting mechanism is provided on the top of the mounting platform to reduce vibration transmission during the operation of the printing equipment. A linear adjustment mechanism is installed on the bottom wall of the mounting platform. A position sensing mechanism is installed at the rear of the bottom wall of the mounting platform to sense the movement position for secondary determination. A moving platform is installed at the bottom of the linear adjustment mechanism. A mounting base is installed at the bottom of the moving platform. A laser emitting device is installed at the bottom of the mounting base. A replacement component is installed inside the moving platform to switch between various types of laser emitting devices. The mounting base is equipped with an assembly seat on its top via an elastic switching mechanism. A locking component is installed on the top of the assembly seat. The top of the locking component is triangular in shape. Several locking grooves are uniformly and linearly opened on the bottom wall of the mounting platform corresponding to the position of the locking component. The locking component abuts against the inner wall of the corresponding locking groove to lock and limit the laser emitting device to prevent it from shifting and to enhance positional accuracy.

[0006] Furthermore, an installation groove is provided inside the mounting platform at the position corresponding to the top of the locking groove. The installation groove is connected to the locking groove, and a long strip electromagnet is installed inside the installation groove. The electromagnet electromagnetically attracts the locking component for locking and limiting to achieve installation and fixation.

[0007] Furthermore, the elastic switching mechanism includes positioning frames fixedly installed on both sides of the top of the moving platform. An abutment spring is installed inside the positioning frame, and a slide block is fixedly installed at the top of the abutment spring. The top wall of the slide block is fixedly connected to a corresponding assembly seat. Under the displacement of the moving platform, the positioning frame drives the slide block, assembly seat, and locking component to shift. After the locking component is stressed in the locking groove, it drives the assembly seat to compress the abutment spring and enter the positioning frame to achieve position switching, allowing the slide block to slide within the positioning frame. Ear blocks are fixedly installed on the outer walls of the slide block, and ear grooves are opened on the outer walls of the positioning frame. The inner walls of the ear grooves are slidably connected to the outer walls of the corresponding ear blocks to limit the sliding of the ear blocks and the slide block.

[0008] Furthermore, the linear adjustment mechanism includes fixed platforms fixedly installed on both sides of the bottom wall of the mounting platform, an adjusting screw rotatably installed between the fixed platforms, a sliding platform screwed onto the outer wall of the adjusting screw, a servo motor fixedly installed on the outer wall of one of the fixed platforms, the power shaft of the servo motor passing through the corresponding fixed platform and fixedly connected to the adjusting screw via a bearing, a limit shaft is provided between the fixed platforms, the outer wall of the limit shaft is slidably connected to the inner wall of the sliding platform to prevent overturning during linear displacement.

[0009] Furthermore, the position sensing mechanism includes an inductive grating scale fixedly installed at the bottom of the mounting platform, a follower seat fixedly installed on the rear wall of the sliding platform, and an indicator arrow on the top of the follower seat. The indicator arrow points to the corresponding position of the inductive grating scale for precise calibration, preventing slight movement of the laser emitting device.

[0010] Furthermore, the replacement assembly includes a positioning mechanism and a locking mechanism. The positioning mechanism includes a positioning cavity at the bottom of the moving platform, a positioning platform inside the positioning cavity, and the outer wall of the positioning platform being fixedly connected to the top of the mounting base. Positioning pins are fixedly installed at the four corners of the top wall of the mounting base. Positioning holes are provided on the bottom wall of the moving platform at the positions corresponding to the positioning pins. The inner walls of the positioning holes are respectively positioned and fitted with the outer walls of the corresponding positioning pins. The cooperation between the positioning pins and the positioning holes, and the cooperation between the positioning platform and the positioning cavity, realizes the precise installation and positioning of the mounting base and the laser emitting device.

[0011] Furthermore, the positioning platform has insertion interfaces on both the front and rear sides of its sidewalls, and the moving platform has mounting cavities on both sides of its interior. Each mounting cavity has a through groove corresponding to the insertion interface. Insertion locks are inserted into the through grooves and the corresponding insertion interfaces to achieve stable installation of the positioning platform and the mounting base. The same displacement platform is fixedly installed on the outer end of each insertion lock located in the same mounting cavity, and the displacement platform slides within the corresponding mounting cavity.

[0012] Furthermore, the locking mechanism includes abutment bolts rotatably mounted on the outer wall of the displacement table. The outer ends of the abutment bolts are screwed through the moving table and fixedly mounted with operating arms. The extension ends of the operating arms away from the abutment bolts are all provided with locking ports. The same locking shaft is inserted into the interior of each locking port. The outer wall of the locking shaft fits against the moving table for limiting.

[0013] Furthermore, the loosening direction of the operating arm and the abutment bolt is the same as the contact position direction of the locking shaft and the moving platform, which is used to prevent the positioning platform, mounting base and laser emitting device from shaking due to loosening of the abutment bolt, thus affecting the accuracy. The outer end of the locking shaft is fitted with an anti-slip sleeve that contacts the operating arm.

[0014] Furthermore, the suspension mounting mechanism includes buffer pads fixedly installed at the four corners of the top of the mounting platform. Each buffer pad has a suspension bracket mounted on its top via a connecting seat. Each of the four corners of the top of the suspension bracket is fixed to the printing equipment via a square seat.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The laser reference line alignment and calibration equipment used for printing registration employs a dual locking structure combining an elastic switching mechanism and an electromagnet. This structure specifically addresses the shortcomings of traditional lead screw sliders, such as residual gaps and susceptibility to vibration-induced displacement. The triangular locking component converts lateral vibration force into longitudinal compression force. Combined with the limiting and guiding of the ear block and ear slot, this ensures that the locking component is precisely embedded in the locking groove to achieve mechanical locking. When the electromagnet is energized, the attraction force forms a secondary fixation, tightly fitting the locking component to the inner wall of the locking groove, completely eliminating residual gaps. The dual locking mechanism enhances the positional accuracy and vibration resistance of the laser emitting device, ensuring accurate and stable reference lines throughout the printing process.

[0016] 2. The laser reference line alignment calibration device used for this printing registration constructs a closed-loop control link of "servo drive - grating feedback - controller fine adjustment" to capture and dynamically correct the position changes of the indicator arrow in real time, which greatly reduces the position offset caused by transmission gap and solves the reference line drift problem that easily occurs after the traditional device moves.

[0017] 3. The laser reference line alignment and calibration equipment used for printing registration adopts a three-level positioning structure of "bidirectional positioning with positioning pins + wedge locking with plug-in locking parts + anti-loosening constraint with locking shafts" to achieve precise fastening between the laser emitting device and the moving stage. The locking shaft is designed in coordination with the force direction, which can increase the clamping force as vibration loosens and completely eliminate the risk of loosening. This structure makes the laser emitting device have high repeatability and strong anti-vibration loosening ability, ensuring the stability of the laser emitting component installation. Moreover, the corresponding laser emitting device can be quickly switched according to the actual printing needs and working conditions.

[0018] 4. The laser reference line alignment calibration equipment used for this printing sleeve adopts an integrated design of "suspension frame + connecting seat + buffer pad" in the suspension installation mechanism, which abandons the traditional rigid installation method, blocks the vibration transmission from the installation source, avoids the vibration from directly acting on the laser emitting device, fundamentally reduces the impact of vibration on the stability of the laser reference line, and solves the reference offset problem caused by vibration transmission in traditional devices.

[0019] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] The structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0022] Figure 1 This is a schematic diagram of the external structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the external structure of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the external structure of the linear adjustment mechanism of the present invention; Figure 4 The internal structure of the linear adjustment mechanism and position sensing mechanism of this invention explodes. Figure 1 ; Figure 5 The internal structure of the linear adjustment mechanism and position sensing mechanism of this invention explodes. Figure 2 ; Figure 6 This is a schematic diagram of the assembly of the mounting platform and the suspension mounting mechanism of the present invention; Figure 7 This is a schematic diagram of the assembly of the mounting platform, the mobile platform, and the flexible switching mechanism of the present invention; Figure 8 This is a cross-sectional view of the internal structure of the flexible switching mechanism of the present invention; Figure 9 This is an exploded view of the internal structure of the elastic switching mechanism of the present invention; Figure 10 This is a combined diagram of the mobile platform, mounting base, laser emitting device, and replacement components of the present invention; Figure 11 This is a cross-sectional view of the internal structure of the mobile platform, mounting base, laser emitting device, and replacement assembly of the present invention. Figure 12 An explosion was observed inside the mobile platform, mounting base, laser emitting device, and replacement assembly of this invention. Figure 1 ; Figure 13 An explosion was observed inside the mobile platform, mounting base, laser emitting device, and replacement assembly of this invention. Figure 2 .

[0023] Illustrations: 1. Mounting platform; 2. Suspension mounting mechanism; 21. Connecting seat; 22. Suspension bracket; 23. Square seat; 24. Buffer pad; 3. Linear adjustment mechanism; 31. Fixed platform; 32. Adjusting screw; 33. Limit shaft; 34. Sliding platform; 35. Servo motor; 4. Position sensing mechanism; 41. Inductive grating scale; 42. Follower seat; 43. Indicator arrow; 5. Moving platform; 6. Mounting seat; 7. Laser emitting device; 8. Changing assembly; 81. Positioning platform; 82. Plug-in connector 83. Positioning cavity; 84. Mounting cavity; 85. Through groove; 86. Positioning pin; 87. Positioning hole; 88. Insertion lock; 89. Displacement stage; 810. Abutment bolt; 811. Operating arm; 812. Locking port; 813. Anti-slip sleeve; 814. Locking shaft; 9. Elastic switching mechanism; 91. Positioning frame; 92. Ear groove; 93. Abutment spring; 94. Slide; 95. Ear block; 10. Assembly base; 11. Locking groove; 12. Mounting groove; 13. Electromagnet; 14. Locking component. Detailed Implementation

[0024] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0025] In the description of this invention, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention 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, and therefore should not be construed as a limitation of the invention. It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be a component positioned centrally in the connection.

[0026] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0027] Please see Figures 1-13 This invention provides a laser reference line alignment calibration device for printing registration, including a mounting platform 1. A suspension mounting mechanism 2 is provided on the top of the mounting platform 1 to reduce the vibration transmission of the printing equipment during operation. A linear adjustment mechanism 3 is installed on the bottom wall of the mounting platform 1. A position sensing mechanism 4 is installed at the rear of the bottom wall of the mounting platform 1 to sense the movement position for secondary determination. A moving platform 5 is installed at the bottom of the linear adjustment mechanism 3. A mounting base 6 is installed at the bottom of the moving platform 5. A laser emitting device 7 is installed at the bottom of the mounting base 6. A replacement assembly 8 is installed inside the moving platform 5 to switch between various types of laser emitting devices 7. Mounting base 6 has an assembly base 10 mounted on its top via an elastic switching mechanism 9. A locking element 14 is mounted on the top of the assembly base 10. The top of the locking element 14 is triangular. The bottom wall of the mounting platform 1 has several locking grooves 11 that are evenly and linearly opened to correspond to the position of the locking element 14. The locking element 14 abuts against the inner wall of the corresponding locking groove 11 to lock and limit the position, preventing the laser emitting device 7 from shifting and enhancing the positional accuracy.

[0028] In this embodiment, the width of the locking groove 11 and the thickness of the locking member 14 are designed to transition and fit together to ensure that there is no lateral wobbling space after the locking member 14 is inserted; the locking member 14 is made of high-strength alloy steel, which can withstand the elastic force of the abutment spring 93 and reduce frictional wear with the inner wall of the locking groove 11 to extend its service life. This design, through the synergy of a triangular structure and precise fit, makes it difficult for the locking component 14 to detach from the locking groove 11 under vibration, and to cooperate with the subsequent electromagnet 13 for adsorption and fixation. From the mechanical structure level, it eliminates the positional displacement of the laser emitting device 7 caused by vibration, and solves the defects of traditional devices such as large locking gap and poor vibration resistance.

[0029] Specifically, an installation groove 12 is provided inside the mounting platform 1 at the position corresponding to the top of the locking groove 11. The inside of the installation groove 12 is connected to the locking groove 11. A long strip electromagnet 13 is installed inside the installation groove 12. The electromagnet 13 electromagnetically attracts the locking member 14 for locking and limiting to achieve installation and fixation.

[0030] In this embodiment, a long-stroke electromagnet 13 is selected, and the large contact area between the adsorption surface and the top of the locking member 14 ensures uniform transmission of adsorption force. An insulating buffer pad is provided on the inner wall of the mounting groove 12, which not only prevents the slight vibration generated by the electromagnet 13 during operation from being transmitted to the mounting platform 1, but also avoids the potential for electrical conductivity between the electromagnet 13 and the mounting platform 1. The electromagnet 13 is linked with the external controller and is only energized and adsorbed after the locking member 14 is accurately embedded in the locking groove 11, realizing the dual protection of "mechanical locking + electromagnetic reinforcement", completely eliminating the residual gap between the locking member 14 and the locking groove 11, and effectively suppressing the drift of the baseline caused by the continuous vibration of the printing machine.

[0031] Specifically, the elastic switching mechanism 9 includes positioning frames 91 fixedly installed on both sides of the top of the moving platform 5. An abutment spring 93 is installed inside the positioning frame 91. A slide 94 is fixedly installed on the top of the abutment spring 93. The top wall of the slide 94 is fixedly connected to the corresponding mounting base 10. Under the displacement of the moving platform 5, the positioning frame 91 drives the slide 94, the mounting base 10 and the locking member 14 to move. After the locking member 14 is subjected to force in the locking groove 11, it drives the mounting base 10 to compress the abutment spring 93 and enter into the positioning frame 91 to realize the position switching, so that the slide 94 slides in the positioning frame 91. Ear blocks 95 are fixedly installed on the outer walls of the slide 94. Ear grooves 92 are opened on the outer walls of the positioning frame 91. The inner walls of the ear grooves 92 are slidably connected to the outer walls of the corresponding ear blocks 95 to limit the sliding of the ear blocks 95 and the slide 94.

[0032] In this embodiment, the ear block 95 and the ear groove 92 are fitted with a clearance to precisely limit the vertical sliding range of the slide block 94, preventing the slide block 94 from shifting and causing the locking member 14 to misalign. Through the elastic restoring force of the abutment spring 93 and the limiting guide of the ear block 95, the locking member 14 can be switched smoothly without jamming. At the same time, it is ensured that the locking member 14 always extends and retracts in the vertical direction, ensuring precise docking with the locking groove 11 and improving the stability and accuracy of the position switching.

[0033] Specifically, the linear adjustment mechanism 3 includes fixed platforms 31 fixedly installed on both sides of the bottom wall of the mounting platform 1. An adjusting screw 32 is rotatably installed between the fixed platforms 31. A sliding platform 34 is screwed onto the outer wall of the adjusting screw 32. A servo motor 35 is fixedly installed on the outer wall of one of the fixed platforms 31. The power shaft of the servo motor 35 passes through the corresponding fixed platform 31 through a bearing and is fixedly connected to the adjusting screw 32. A limit shaft 33 is provided between the fixed platforms 31. The outer wall of the limit shaft 33 is slidably connected to the inner wall of the sliding platform 34 to prevent overturning during linear displacement.

[0034] In this embodiment, the adjusting screw 32 is a precision ball screw, the limiting shaft 33 is a precision optical shaft, and the servo motor 35 is a high-precision servo motor. The servo motor 35 forms a closed-loop control with the external controller through the encoder, which can accurately respond to displacement commands. With the anti-rollover design of the limiting shaft 33, the sliding table 34 drives the moving table 5 and the laser emitting device 7 to achieve smooth and precise linear movement.

[0035] Specifically, the position sensing mechanism 4 includes an inductive grating scale 41 fixedly installed at the bottom of the mounting platform 1, a follower seat 42 fixedly installed on the rear wall of the sliding platform 34, and an indicator arrow 43 on the top of the follower seat 42. The indicator arrow 43 points to the corresponding position of the inductive grating scale 41 for precise calibration to prevent the laser emitting device 7 from moving slightly.

[0036] In this embodiment, the inductive grating scale 41 can capture the minute positional changes of the indicator arrow 43 in real time. The indicator arrow 43 is located on the top of the follower seat 42 to ensure the recognition stability of the inductive grating scale 41. The follower seat 42 and the sliding stage 34 adopt an integral molding structure to avoid the positional deviation of the indicator arrow 43 caused by the offset of the follower seat 42. This enables real-time monitoring and data feedback of the displacement of the sliding stage 34, forming a closed-loop link of "drive-displacement-monitoring-correction" to compensate for minute offsets in a timely manner and ensure the continuous accuracy of the position of the laser emitting device 7.

[0037] Specifically, the replacement component 8 includes a positioning mechanism and a locking mechanism. The positioning mechanism includes a positioning cavity 83 located at the bottom of the moving platform 5. A positioning platform 81 is provided inside the positioning cavity 83. The outer wall of the positioning platform 81 is fixedly connected to the top of the mounting base 6. Positioning pins 86 are fixedly installed at the four corners of the top wall of the mounting base 6. Positioning holes 87 are provided on the bottom wall of the moving platform 5 at the positions corresponding to the positioning pins 86. The inner wall of the positioning hole 87 is positioned and fitted with the outer wall of the corresponding positioning pin 86. The positioning pins 86 and positioning holes 87 cooperate, and the positioning platform 81 and positioning cavity 83 cooperate to achieve precise installation and positioning of the mounting base 6 and the laser emitting device 7.

[0038] In this implementation scheme, the positioning hole 87 ensures that the positioning pin 86 is not loose after insertion, and the top of the positioning platform 81 is provided with a guide slope to facilitate quick insertion into the positioning cavity 83 and improve the replacement efficiency. The positioning mechanism has a dual positioning design of "four corner positioning pins 86 + overall positioning platform 81", which has higher positioning accuracy and stronger stability. It can be adapted to the quick replacement of laser emitting devices 7 of different specifications to meet the printing needs of multiple working conditions.

[0039] Specifically, the positioning platform 81 has insertion interfaces 82 on both the front and rear sides of its sidewalls, and the moving platform 5 has mounting cavities 84 on both sides of its interior. The mounting cavities 84 have through slots 85 at positions corresponding to the insertion interfaces 82. Insertion locks 88 are inserted into the slots 85 and the corresponding insertion interfaces 82 to achieve stable installation of the positioning platform 81 and the mounting base 6. The same displacement platform 89 is fixedly installed on the outer end of the insertion locks 88 located in the same mounting cavity 84. The displacement platform 89 slides in the corresponding mounting cavity 84.

[0040] In this embodiment, the plug-in locking member 88 adopts a wedge-shaped structure design with an inclined insertion end, which facilitates precise insertion into the plug-in interface 82. The displacement stage 89 and the inner wall of the mounting cavity 84 are fitted with a clearance, which restricts the displacement stage 89 to slide only in the horizontal direction, ensuring that the plug-in locking member 88 is inserted into the plug-in interface 82 synchronously. The width of the groove 85 is slightly larger than the diameter of the plug-in lock 88, providing reserved space for the movement of the plug-in lock 88 to avoid friction. The displacement table 89 drives the double plug-in locks 88 to move synchronously, realizing bidirectional locking of the positioning table 81 and uniform force distribution.

[0041] Specifically, the locking mechanism includes an abutment bolt 810 rotatably mounted on the outer wall of the displacement table 89. The outer ends of the abutment bolt 810 are screwed through the moving table 5 and fixedly mounted with an operating arm 811. The extended ends of the operating arm 811 away from the abutment bolt 810 are all provided with locking ports 812. The same locking shaft 814 is inserted into the interior of the locking ports 812. The outer wall of the locking shaft 814 fits and limits the movement of the moving table 5.

[0042] In this embodiment, the abutting bolt 810 can precisely control the advancing distance of the displacement stage 89, so that the plug-in lock 88 and the plug-in interface 82 can be matched; the surface of the operating arm 811 is provided with anti-slip texture to facilitate manual rotation by the operator, and the length design of the operating arm 811 conforms to ergonomics to reduce the operating force, ensuring that the locking shaft 814 fits tightly after being inserted into the locking port 812, and the locking shaft 814 performs linkage limit on the two operating arms 811.

[0043] Specifically, the loosening direction of the operating arm 811 and the abutment bolt 810 is the same as the contact position direction of the locking shaft 814 and the moving table 5, which is used to prevent the positioning table 81, the mounting base 6 and the laser emitting device 7 from shaking due to the loosening of the abutment bolt 810, thus affecting the accuracy. The outer end of the locking shaft 814 is fitted with an anti-slip sleeve 813 that contacts the operating arm 811.

[0044] In this implementation scheme, the anti-slip sleeve 813 is made of silicone, which can effectively increase the friction between the locking shaft 814 and the operating arm 811 to prevent the locking shaft 814 from accidentally falling off. When the vibration of the printing machine causes the operating arm 811 to loosen, the contact pressure between the locking shaft 814 and the moving table 5 will increase synchronously, forming a reverse constraint to completely prevent the abutment bolt 810 from loosening, ensuring that the plug-in lock 88 is always tightly embedded in the plug-in interface 82, ensuring that the laser emitting device 7 is installed stably and avoiding positional displacement caused by vibration.

[0045] Specifically, the suspension mounting mechanism 2 includes buffer pads 24 fixedly installed at the four corners of the top of the mounting platform 1. Each buffer pad 24 has a suspension bracket 22 installed on its top via a connecting seat 21. Each of the four corners of the top of the suspension bracket 22 is fixed to the printing equipment via a square seat 23.

[0046] In this implementation scheme, the suspension mechanism blocks vibration transmission from the installation source, reduces the horizontal vibration displacement of the mounting platform 1, provides a stable installation foundation for the laser emitting device 7, and fundamentally weakens the impact of vibration on the accuracy of the baseline.

[0047] Working principle of this device: The servo motor 35, inductive grating scale instrument 41, laser emitting device 7, and electromagnet 13 of this device are electrically connected to an external power supply through a standardized wire layout, providing a stable and controllable power source for the entire process of the device operation. The models of the electrical control components can be flexibly selected from the existing standard parts system according to the actual working conditions. The signal input terminals of the above-mentioned electrical control components are precisely connected one-to-one with the signal output terminals of the external controller. The signal feedback terminals of the inductive grating scale instrument 41 and laser emitting device 7 are connected to the signal input terminals of the controller, which can realize real-time transmission and precise execution of commands. Through innovative structural design, a targeted solution is formed. The following is a detailed explanation of the specific working principle and technical effects: The entire device is fixed by the suspension mounting mechanism 2. This structure provides a basic guarantee for subsequent vibration resistance and anti-displacement. Compared with the traditional rigid fixing method, it innovatively adopts the "suspension buffer integration" design, which weakens the vibration transmission from the installation source. The operator installs the device into the reserved hole of the printing equipment by passing the fastening bolt through the mounting hole of the square seat 23. The suspension frame 22, the mounting platform 1 and the entire device are suspended inside the printing equipment. The connecting seat 21 serves as a transition connection between the suspension frame 22 and the mounting platform 1. Together with the bottom buffer pad 24 (made of elastic rubber with excellent vibration absorption capacity), it forms a double anti-vibration structure. The buffer pad 24 can effectively attenuate the micro-vibrations generated when the printing machine is working, reduce the transmission efficiency of vibration to the mounting platform 1, and the suspension layout avoids the rigid contact between the mounting platform 1 and the equipment body, reducing the risk of vibration resonance and ensuring the stability of the installation foundation of the laser emitting device 7 to avoid the position displacement problem caused by vibration. Multi-level positioning lock After selecting the appropriate laser emitting device 7 according to the printing area and registration accuracy requirements, the laser emitting device 7 and the moving stage 5 are precisely fixed. The movable mounting base 6 drives the laser emitting device 7 and the positioning stage 81 to be precisely embedded in the positioning cavity 83 at the bottom of the moving stage 5. During this process, the mounting base 6 simultaneously drives the positioning pins 86 on both sides to insert into the corresponding positioning holes 87 to form bidirectional radial positioning, ensuring the initial alignment of the mounting base 6 and the moving stage 5 and avoiding installation offset. The operator then rotates the outer edge of the operating arm 811, driving the abutment bolt 810 through the internal threaded hole of the moving platform 5 to push the displacement platform 89 to slide linearly within the mounting cavity 84 (the inner wall of the mounting cavity 84 restricts the displacement platform 89 to move only axially to prevent displacement), thereby driving the plug-in locking piece 88 at the front end of the displacement platform 89 to gradually insert into the plug-in interface 82 on the outer wall of the positioning platform 81 through the groove 85 to complete the mechanical locking. As the operating arm 811 continues to rotate, the abutment bolt 810 gradually sinks into the mounting cavity 84, and the plug-in locking piece 88 cooperates with the plug-in interface 82 to achieve the fastening of the laser emitting device 7. To prevent the abutment bolt 810 from loosening due to vibration, an anti-loosening locking mechanism is added. After the operating arm 811 is rotated to the rear position of the moving table 5, the movable locking shaft 814 passes through the locking port 812 of the operating arm 811, and the outer end is fitted with an anti-slip sleeve 813 (made of silicone material to increase friction), so that the locking shaft 814 is tightly fitted with the top of the moving table 5. Utilizing the principle of force direction coordination, the natural loosening direction of the operating arm 811 and the abutment bolt 810 is consistent with the pressing direction of the locking shaft 814. When vibrating, the pressing force of the locking shaft 814 will increase with the loosening trend, forming a reverse constraint, which completely avoids the abutment bolt 810 from loosening and the insertion lock 88 from shifting. Through a three-level positioning structure consisting of "positioning pin 86 bidirectional positioning + plug-in locking piece 88 locking + locking shaft 814 anti-loosening constraint", the laser emitting device 7 has high installation positioning accuracy. Compared with the traditional single bolt fixing, its anti-vibration and loosening ability is improved. It can withstand the high-frequency micro-vibration during continuous operation of the printing press to ensure the stability of the laser emitting device 7 installation position.

[0048] Precision movement adjustment and real-time position monitoring After the laser emitting device 7 is fixed, its precise movement and positioning are achieved through closed-loop control of servo drive and grating detection. The servo motor 35 (high-precision servo motor 35) on the outer wall of the fixed stage 31 is started, driving the adjusting screw 32 (precision ball screw) to rotate. Since the adjusting screw 32 is screwed to the sliding stage 34 and the sliding stage 34 is fitted on the outer wall of the limiting shaft 33, the rotational freedom of the sliding stage 34 can be effectively restricted to prevent it from flipping or deviating, so that the sliding stage 34 can move smoothly and linearly along the adjusting screw 32 and the limiting shaft 33. During the movement of the sliding stage 34, the follower seat 42 and the bottom indicator arrow 43 are simultaneously driven to slide at the bottom of the inductive grating scale instrument 41. The inductive grating scale instrument 41 captures the position signal of the indicator arrow 43 in real time and feeds the data back to the external controller to form a closed-loop position monitoring. The controller dynamically adjusts the speed and direction of the servo motor 35 according to the preset position parameters and the real-time feedback data until the sliding stage 34 drives the moving stage 5, the mounting seat 6 and the laser emitting device 7 to move precisely to the specified position to complete the initial positioning.

[0049] Through the collaborative design of "precision ball screw + limit guide + real-time grating feedback", the laser emitting device 7 has high movement and positioning accuracy, reduces the position deviation caused by transmission gap, and the high-frequency sampling capability of the grating scale instrument can capture minute position changes in real time to provide data support for subsequent locking and correction.

[0050] Flexible switching locking and electromagnetic secondary fixing To further address the core defect of "vibration causing gap between lead screw and slider, leading to position shift after positioning", the device innovatively designs a dual locking structure with elastic switching mechanism 9 and electromagnet 13 working together to achieve multi-level mechanical and electromagnetic fixation to completely lock the position after the moving platform 5 is in place. When the moving platform 5 moves with the sliding platform 34, it synchronously drives the elastic switching mechanism 9, the mounting base 10, and the locking member 14 to slide along the locking groove 11 at the bottom of the mounting platform 1. The locking member 14 adopts a triangular structure design. This shape can convert the lateral force generated by vibration into longitudinal compression force, preventing the locking member 14 from jamming or accidentally disengaging. When the locking member 14 is under force and ready to switch the locking position, the triangular inclined surface is under force and drives the mounting base 10 to retract into the positioning frame 91 to compress the sliding block 94 and the abutment spring 93. The lugs 95 on both sides of the mounting base 10 slide along the lug grooves 92 of the positioning frame 91, which precisely limits the movement path of the sliding block 94 to prevent the sliding block 94 from shifting and causing the locking member 14 to misalign. When the moving platform 5 reaches the preset position, it abuts against the spring 93 to release elastic potential energy, pushing the slide 94, the mounting base 10 and the locking part 14 to extend out from the positioning frame 91, so that the locking part 14 is precisely embedded in the corresponding locking groove 11 to achieve mechanical locking. The controller simultaneously controls the electromagnet 13 to be energized, and the locking part 14 in the locking groove 11 is fixed for a second time through the electromagnetic adsorption principle, so that the locking part 14 is tightly attached to the inner wall of the locking groove 11 to completely eliminate the residual gap between the lead screw and the slider. At the same time, the position sensing mechanism 4 continuously monitors the position of the mounting base 6 and the laser emitting device 7. If a slight deviation is detected, it is immediately fed back to the controller, and the servo motor 35 is started to make fine adjustments to form a dynamic correction and calibration mechanism. This dual locking and dynamic correction structure can determine the position of the laser emitting device 7, effectively solving the problem of baseline drift caused by continuous vibration of the printing press, and improving the stability of registration accuracy. This device follows the working logic of "installation vibration resistance - precise positioning - closed-loop movement - multi-level locking - dynamic monitoring". All structures work together to form a systematic solution to the shortcomings of traditional technologies, compared with traditional laser calibration devices; The core differences and advantages are reflected in three aspects: First, the vibration-resistant design starts from the source, and the vibration transmission is weakened by the suspension buffer mechanism to avoid the impact of vibration on the core components; Secondly, multi-level positioning locking and electromagnetic secondary fixing are used to completely eliminate transmission gaps and prevent position deviation caused by vibration. Third, construct an electronic control closed-loop control link, and combine grating high-frequency detection and dynamic fine-tuning to achieve precise control of the entire process of "positioning-locking-monitoring-correction"; Ultimately, the device can achieve high-precision and stable output of laser reference lines, meeting the registration requirements of high-end printing, while reducing equipment debugging time and operator skill dependence, thus improving printing production efficiency and quality stability.

[0051] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A laser reference line alignment calibration device for printing registration, comprising a mounting platform (1), characterized in that: The mounting platform (1) is provided with a suspension mounting mechanism (2) at the top to reduce the vibration transmission of the printing equipment during operation. The mounting platform (1) is provided with a linear adjustment mechanism (3) at the bottom wall. The mounting platform (1) is provided with a position sensing mechanism (4) at the rear of the bottom wall to sense the movement position for secondary determination. The linear adjustment mechanism (3) is provided with a moving platform (5) at the bottom. The moving platform (5) is provided with a mounting base (6) at the bottom. The mounting base (6) is provided with a laser emitting device (7) at the bottom. The moving platform (5) is provided with a replacement assembly (8) inside to switch between various types of laser emitting devices (7). The mounting base (6) is equipped with an assembly base (10) on its top via an elastic switching mechanism (9). A locking element (14) is installed on the top of the assembly base (10). The top of the locking element (14) is triangular. The bottom wall of the mounting platform (1) and the position corresponding to the locking element (14) are uniformly and linearly provided with several locking grooves (11). The locking element (14) abuts against the inner wall of the corresponding locking groove (11) to lock and limit the laser emitting device (7) to prevent it from shifting and to enhance the positional accuracy.

2. The laser reference line alignment calibration device for printing registration according to claim 1, characterized in that: An installation groove (12) is provided inside the mounting platform (1) and at the position corresponding to the top of the locking groove (11). The installation groove (12) is connected to the locking groove (11). A long strip electromagnet (13) is installed inside the installation groove (12). The electromagnet (13) uses electromagnetic adsorption to fix the locking member (14) of the locking limit.

3. The laser reference line alignment calibration device for printing registration according to claim 1, characterized in that: The elastic switching mechanism (9) includes positioning frames (91) fixedly installed on both sides of the top of the moving platform (5). An abutment spring (93) is installed inside the positioning frame (91). A slide block (94) is fixedly installed at the top of the abutment spring (93). The top wall of the slide block (94) is fixedly connected to the corresponding mounting base (10). Under the displacement of the moving platform (5), the positioning frame (91) drives the slide block (94), mounting base (10), and locking element (14) to shift. The locking element (14)... After the locking groove (11) is subjected to force, it drives the assembly seat (10) to compress the abutment spring (93) and enter the positioning frame (91) to realize the position switching, so that the slide (94) slides in the positioning frame (91). The outer side wall of the slide (94) is fixedly installed with ear blocks (95), and the outer side wall of the positioning frame (91) is provided with ear grooves (92). The inner wall of the ear groove (92) is slidably connected to the outer wall of the corresponding ear block (95) to limit the sliding of the ear block (95) and the slide (94).

4. The laser reference line alignment calibration device for printing registration according to claim 1, characterized in that: The linear adjustment mechanism (3) includes fixed platforms (31) fixedly installed on both sides of the bottom wall of the mounting platform (1). An adjusting screw (32) is rotatably installed between the fixed platforms (31). A sliding platform (34) is screwed onto the outer wall of the adjusting screw (32). A servo motor (35) is fixedly installed on the outer wall of one of the fixed platforms (31). The power shaft of the servo motor (35) passes through the corresponding fixed platform (31) through a bearing and is fixedly connected to the adjusting screw (32). A limit shaft (33) is provided between the fixed platforms (31). The outer wall of the limit shaft (33) is slidably connected to the inner wall of the sliding platform (34) to prevent overturning during linear displacement.

5. The laser reference line alignment calibration device for printing registration according to claim 1, characterized in that: The position sensing mechanism (4) includes an inductive grating scale instrument (41) fixedly installed at the bottom of the mounting platform (1). A follower seat (42) is fixedly installed on the rear wall of the sliding platform (34). An indicator arrow (43) is provided on the top of the follower seat (42). The indicator arrow (43) points to the corresponding position of the inductive grating scale instrument (41) for precise calibration to prevent the laser emitting device (7) from moving slightly.

6. The laser reference line alignment calibration device for printing registration according to claim 1, characterized in that: The replacement assembly (8) includes a positioning mechanism and a locking mechanism. The positioning mechanism includes a positioning cavity (83) at the bottom of the moving platform (5). A positioning platform (81) is provided inside the positioning cavity (83). The outer wall of the positioning platform (81) is fixedly connected to the top of the mounting base (6). Positioning pins (86) are fixedly installed at the four corners of the top wall of the mounting base (6). Positioning holes (87) are provided on the bottom wall of the moving platform (5) at the positions corresponding to the positioning pins (86). The inner wall of the positioning hole (87) is positioned and fitted with the outer wall of the corresponding positioning pin (86). The positioning pin (86) and the positioning hole (87) cooperate, and the positioning platform (81) and the positioning cavity (83) cooperate to achieve precise installation and positioning of the mounting base (6) and the laser emitting device (7).

7. The laser reference line alignment calibration device for printing registration according to claim 6, characterized in that: The positioning platform (81) has insertion interfaces (82) on both the front and rear sides of its sidewalls. The moving platform (5) has mounting cavities (84) on both sides inside its interior. The mounting cavities (84) have through slots (85) at positions corresponding to the insertion interfaces (82). Insertion locks (88) are inserted into the slots (85) and the corresponding insertion interfaces (82) to achieve stable installation of the positioning platform (81) and the mounting base (6). The same displacement platform (89) is fixedly installed on the outer end of the insertion locks (88) located in the same mounting cavity (84). The displacement platform (89) slides in the corresponding mounting cavity (84).

8. The laser reference line alignment calibration device for printing registration according to claim 6, characterized in that: The locking mechanism includes an abutment bolt (810) rotatably mounted on the outer wall of the displacement table (89). The outer ends of the abutment bolt (810) are screwed through the moving table (5) and fixedly mounted with an operating arm (811). The extension ends of the operating arm (811) away from the abutment bolt (810) are all provided with locking ports (812). The same locking shaft (814) is inserted into the interior of the locking ports (812). The outer wall of the locking shaft (814) fits and limits the movement of the moving table (5).

9. The laser reference line alignment calibration device for printing registration according to claim 8, characterized in that: The loosening direction of the operating arm (811) and the abutment bolt (810) is the same as the contact position direction of the locking shaft (814) and the moving table (5), which is used to prevent the positioning table (81), the mounting base (6) and the laser emitting device (7) from shaking due to the loosening of the abutment bolt (810), thus affecting the accuracy. The outer end of the locking shaft (814) is fitted with an anti-slip sleeve (813) that contacts the operating arm (811).

10. The laser reference line alignment calibration device for printing registration according to claim 1, characterized in that: The suspension mounting mechanism (2) includes buffer pads (24) fixedly installed at the four corners of the top of the mounting platform (1). Each buffer pad (24) has a suspension frame (22) installed on its top via a connecting seat (21). Each of the four corners of the top of the suspension frame (22) is fixed to the printing equipment via a square seat (23).

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