A laser marking machine

Abstract

The application discloses a kind of laser marking machines, including frame, vibration feeding mechanism and glass disc assembly are fixedly connected on the frame, the glass disc assembly is successively provided with material guiding assembly, camera assembly, laser marking head, MARK point detection camera and blowing assembly around its outline one circle;The material guiding assembly, camera assembly, laser marking head and MARK point detection camera are all equipped with independent adjusting mechanism.The present application can realize the full-process automation operation of small-size rectangular products from automatic feeding, posture unification, carving surface identification, laser marking, marking quality detection to classification collection, greatly improve production efficiency and product pass rate, and change type is convenient, and strong versatility.

Description

Technical Field

[0001] This invention relates to the field of marking machine technology, and more particularly to a laser marking machine. Background Technology

[0002] Laser marking is a processing method that uses a high-energy-density laser beam to locally irradiate the surface of a workpiece, causing the surface material to vaporize or change color, thereby leaving a permanent mark. It has the advantages of high marking accuracy, fast speed, no pollution, and permanent and clear marking, and is widely used in product marking processing in industries such as electronic components, hardware accessories, plastic products, and medical devices.

[0003] Currently, existing technologies for laser marking of small rectangular products (such as chips, resistors, capacitors, and small hardware parts) have the following main drawbacks: 1. Low level of automation, mostly relying on manual feeding and sorting, resulting in high labor intensity, low production efficiency, and problems such as missed printing, incorrect printing, and sorting errors due to manual operation; 2. After vibratory feeding, the product postures are messy, and it is impossible to ensure that the engraved surface is facing up uniformly. The postures need to be adjusted manually one by one, which seriously affects the marking efficiency and marking consistency. 3. The lack of an automatic quality inspection process after marking makes it impossible to identify marking defects such as missed marking, off-center marking, and uneven marking depth in a timely manner, resulting in defective products flowing into subsequent processes and affecting product quality; Therefore, we designed a laser marking machine to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a laser marking machine that can automate the entire process of small rectangular products, from automatic feeding, uniform posture, engraving surface recognition, laser marking, marking quality detection, and classification collection. This significantly improves production efficiency and product qualification rate, and is also easy to change and highly versatile.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A laser marking machine includes a frame, on which a vibrating feeding mechanism and a glass disk assembly are fixedly connected. A guide assembly, a camera assembly, a laser marking head, a MARK dot detection camera, and a blowing assembly are sequentially arranged around the outline of the glass disk assembly. Each of the guide assembly, camera assembly, laser marking head, and MARK dot detection camera has an independent adjustment mechanism. The blowing assembly includes a box frame fixedly connected to the frame, on which a good product box, a defective product box, and an unmarked product box are slidably connected. Three blowing nozzles, each corresponding to one of the good product box, defective product box, and unmarked product box, are fixedly connected to the top of the box frame.

[0006] Preferably, the vibratory feeding mechanism includes a fixed plate fixedly connected to a frame, a column fixedly connected to the top of the fixed plate, a clamping plate fixedly connected to the outer wall of the column, a feed hopper extending through and fixedly connected to the clamping plate, a conveying box fixedly connected to the outer wall of the column, the conveying box being arranged directly below the feed hopper, a feeding vibratory plate fixedly connected to the top of the fixed plate, a conveying frame fixedly connected to the side wall of the feeding vibratory plate, and the end of the conveying frame extending above the glass surface of the glass plate assembly.

[0007] Preferably, an arc-shaped retaining ring is fixedly connected to the top of the glass disk assembly along its outer contour, and the opening of the arc-shaped retaining ring faces the opening direction of the good product box, the defective product box, and the unmarked product box.

[0008] Preferably, the adjustment mechanism includes a guide rail fixedly connected to the frame, a slider slidably connected to the outer wall of the guide rail, a T-shaped locking screw threaded through the slider and threadedly connected to it, and the end of the T-shaped locking screw abutting against the outer wall of the guide rail; the material guiding assembly, camera assembly, laser marking head and MARK point detection camera are respectively fixedly connected to the side wall of their corresponding sliders.

[0009] Preferably, the side walls of the good product box, the defective product box, and the unmarked product box are all fixedly connected with C-shaped handles, and the outer walls of the C-shaped handles are covered with rubber protective sleeves.

[0010] Preferably, the good product box, the defective product box, and the unmarked product box all have an opening at one end facing the glass plate assembly, and the blowing nozzle sprays towards the outer edge of the glass plate assembly, and is precisely aligned with the center of the opening of the corresponding product box.

[0011] Preferably, the side wall of the frame is provided with a material inlet / outlet and a maintenance door, the front of the frame is inlaid with transparent glass, and the top of the frame is fixedly connected with a three-color alarm light.

[0012] Preferably, the discharge end of the feeding box extends directly above the feed inlet of the feeding vibratory plate, and both sides of the feeding frame are provided with upwardly extending baffles.

[0013] Preferably, the abutting end of the T-shaped locking screw is fixedly connected to a rubber anti-slip pad, and the handheld end of the T-shaped locking screw is provided with anti-slip knurling.

[0014] Compared with the prior art, the beneficial effects of this invention are as follows: 1. The vibratory feeding mechanism, combined with the glass tray assembly, enables automatic sorting and continuous flow of products to be marked. With the addition of visual recognition, laser marking, and automatic blowing and sorting, no manual intervention is required throughout the process, which greatly improves marking efficiency. A single machine can replace 3-5 workers.

[0015] 2. The material guiding component can push upright rectangular products into a flat position. In conjunction with the camera component, the visual algorithm can automatically identify the orientation of the engraved surface, ensuring the accuracy of the marking surface and improving the consistency and pass rate of marking.

[0016] 3. Add a MARK point detection camera to perform secondary quality inspection on the marked products. It can automatically distinguish between good products, defective products with marking defects, and unmarked products. Combined with the three-class blowing component, it can achieve accurate classification and collection without the need for manual secondary sorting, thus reducing labor intensity.

[0017] 4. The feeder, camera, laser marking head, and MARK point detection camera are all equipped with independent guide rail slider adjustment mechanisms, which can quickly adjust the position of each station according to different product specifications, shortening the changeover time to less than 10 minutes. The equipment has a wide range of applications.

[0018] In summary, this invention enables fully automated operation of small rectangular products, from automatic feeding, uniform posture, engraved surface recognition, laser marking, marking quality detection to classification and collection, which greatly improves production efficiency and product qualification rate, and is convenient for changeover and has strong versatility. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a laser marking machine proposed in this invention; Figure 2 This is a schematic diagram of the structure of a laser marking machine with the frame removed, as proposed in this invention. Figure 3 This is a schematic diagram of the structure of the vibration feeding mechanism in a laser marking machine proposed in this invention; Figure 4 This is a schematic diagram of a portion of the structure of a laser marking machine proposed in this invention; Figure 5 This is a schematic diagram of the guide rail, slider, and T-shaped locking screw in a laser marking machine proposed in this invention; Figure 6 This is a schematic diagram of the structure of the vibration feeding mechanism, glass disk assembly, material guiding assembly, camera assembly, and blowing assembly in a laser marking machine proposed in this invention; Figure 7 This is a schematic diagram of the structure of the vibration feeding mechanism and glass disk assembly in a laser marking machine proposed in this invention.

[0020] In the diagram: 1. Frame, 2. Vibrating feeding mechanism, 21. Fixing plate, 22. Column, 23. Clamping plate, 24. Feed hopper, 25. Feed box, 26. Feeding vibratory plate, 27. Feeding frame, 3. Glass tray assembly, 4. Guide assembly, 5. Camera assembly, 6. Laser marking head, 7. MARK point detection camera, 8. Blowing assembly, 81. Box frame, 82. Good product box, 83. Defective product box, 84. Unmarked product box, 85. Blowing nozzle, 9. Inlet / outlet, 10. Inspection door, 11. Transparent glass, 12. Three-color alarm light, 13. Guide rail, 14. Slider, 15. T-shaped locking screw. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0022] Reference Figures 1-7 A laser marking machine includes a frame 1, on which a vibrating feeding mechanism 2 and a glass disk assembly 3 are fixedly connected. Around the outline of the glass disk assembly 3, a guide assembly 4 (the guide assembly 4 is a horizontally set stainless steel guide plate; when a standing rectangular product passes under the guide plate, the lower edge of the guide plate contacts the top of the product, pushing it down into a flat position), a camera assembly 5, a laser marking head 6, a MARK dot detection camera 7, and a blowing assembly 8 are arranged in sequence. The guide assembly 4, the camera assembly 5, the laser marking head 6, and the MARK dot detection camera 7 are all equipped with independent adjustment mechanisms.

[0023] The vibrating feeding mechanism 2 includes a fixed plate 21 fixedly connected to the frame 1. A column 22 is fixedly connected to the top of the fixed plate 21. A clamping plate 23 is fixedly connected to the outer wall of the column 22. A feeding hopper 24 is passed through and fixedly connected to the clamping plate 23. A conveying box 25 is fixedly connected to the outer wall of the column 22. The conveying box 25 is located directly below the feeding hopper 24 and its discharge end extends directly above the inlet of the feeding vibrating plate 26. A feeding vibrating plate 26 is fixedly connected to the top of the fixed plate 21. A conveying frame 27 is fixedly connected to the side wall of the feeding vibrating plate 26. The end of the conveying frame 27 extends above the glass surface of the glass plate assembly 3. Both sides of the conveying frame 27 are provided with upwardly extending baffles.

[0024] An arc-shaped retaining ring is fixedly connected to the top of the glass tray assembly 3 along its outer contour. The opening of the arc-shaped retaining ring faces the opening direction of the good product box 82, the defective product box 83, and the unmarked product box 84. The adjustment mechanism includes a guide rail 13 fixedly connected to the frame 1. A slider 14 is slidably connected to the guide rail 13 on its outer wall. A T-shaped locking screw 15 is threadedly connected to the slider 14. The end of the T-shaped locking screw 15 abuts against the outer wall of the guide rail 13. A rubber anti-slip pad is fixedly connected to the abutting end, and an anti-slip knurled surface is provided at the handle end.

[0025] The material guide assembly 4, camera assembly 5, laser marking head 6 and MARK point detection camera 7 are fixedly connected to the side wall of their corresponding slider 14. The gap between the material guide assembly 4 and the glass disk assembly 3 is slightly larger than the product thickness and smaller than the product height, allowing only flat products to pass through, while standing products will be pushed down to a uniform posture.

[0026] The blowing assembly 8 includes a box frame 81 fixedly connected to the frame 1. A good product box 82, a defective product box 83, and an unmarked product box 84 are slidably connected to the box frame 81. Each of the three boxes has a C-shaped handle fixedly connected to its side wall. The outer wall of the C-shaped handle is covered with a rubber protective sleeve. Each of the three boxes has an opening at the end facing the glass tray assembly 3. Three blowing nozzles 85 are fixedly connected to the box frame 81, corresponding one-to-one with the good product box 82, the defective product box 83, and the unmarked product box 84. (All blowing nozzles 85 are connected to an external compressed air source through an air pipe. The compressed air pressure can be adjusted between 0.2-0.6 MPa according to the weight of the product.) The blowing direction of the blowing nozzles 85 is towards the outer edge of the glass tray assembly 3 and is aligned with the center of the opening of the corresponding box.

[0027] The side wall of frame 1 is provided with inlet / outlet 9 and maintenance door 10. The front of frame 1 is inlaid with transparent glass 11, and the top of frame 1 is fixedly connected with a three-color alarm light 12.

[0028] This laser marking machine also includes a PLC control system, which is electrically connected to the vibrating feeding mechanism 2, the rotating glass disk assembly 3, the camera assembly 5, the laser marking head 6, the MARK dot detection camera 7, and all the blowing nozzles 85, respectively, to control each station to run synchronously according to the rhythm; the camera assembly 5 and the MARK dot detection camera 7 transmit images to the control system, and the control system identifies the posture of the product and the marking quality through a visual algorithm, and sends control signals to the corresponding actuators.

[0029] In this invention, the equipment adopts an integrated design of vibration sorting feeding and continuous rotation of the glass disk, realizing the fully automated operation of rectangular products from automatic feeding, uniform posture, engraving surface recognition, marking, marking quality detection and classification collection. Each station runs synchronously according to the rhythm, and no manual intervention is required throughout the process, which effectively improves marking efficiency and classification accuracy.

[0030] In operation, the rectangular product to be marked is poured into the feed hopper 24. The product falls through the feed hopper 24 into the conveying box 25 directly below it, and then is conveyed through the conveying box 25 to the feed inlet of the feeding vibratory plate 26. The feeding vibratory plate 26 sorts the disordered products one by one through high-frequency vibration and conveys them into the conveying frame 27. The baffles on both sides of the conveying frame 27 prevent the products from falling. The products finally slide onto the glass plate surface of the glass plate assembly 3. The glass plate assembly 3 drives the product to rotate at a constant speed along its contour surface. When the product passes under the guide assembly 4, the guide assembly 4 contacts the top of the standing rectangular product and pushes it down into a uniform flat position. Then the product flows to the camera assembly 5, which takes a picture of the flat product and uses a visual algorithm to determine whether the engraved surface of the product is facing upward. If the engraved surface is facing upward, the laser marking head 6 starts to complete the marking operation when the product flows to the laser marking head 6. If the engraved surface is facing downward, the laser marking head 6 does not perform the marking action. After marking is completed, the product continues to flow to the MARK point inspection camera 7. The MARK point inspection camera 7 takes a second photo of the product to distinguish between good products with normal marking, defective products with defective marking content, and products without marking.

[0031] When the three types of products flow to the corresponding blowing nozzles 85, the three blowing nozzles 85 are activated sequentially according to the detection results, blowing the corresponding products into the good product box 82, the defective product box 83, and the unmarked product box 84, respectively, completing the classification and collection. The arc-shaped retaining ring on the top of the glass tray assembly 3 prevents products from falling off the edge during rotation, leaving only an opening at the corresponding position of the box opening for products to be blown in. When changing products of different specifications, the slider 14 can be slid along the guide rail 13 to adjust the position of each station assembly, and the T-shaped locking screw 15 can be tightened to fix it. The rubber anti-slip pad prevents the slider from loosening, and the anti-slip knurling facilitates operation. After the box is full, the box can be pulled out and the products poured out through the C-shaped handle. After being put back, the operation can continue (the products collected in the marked product box 84 can be poured back into the feed hopper 24 for secondary marking until all products have completed the marking operation). The transparent glass 11 on the front of the frame 1 allows for easy observation of the internal operating status. The inlet and outlet 9 are used to replenish raw materials and replace material boxes. The maintenance door 10 facilitates equipment maintenance. The three-color alarm light 12 can emit an audible and visual alarm when the equipment malfunctions.

[0032] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A laser marking machine, comprising a frame (1), characterized in that, The frame (1) is fixedly connected to a vibrating feeding mechanism (2) and a glass disk assembly (3). The glass disk assembly (3) is arranged around its outline with a material guide assembly (4), a camera assembly (5), a laser marking head (6), a MARK point detection camera (7), and a blowing assembly (8). The feeding assembly (4), camera assembly (5), laser marking head (6) and MARK point detection camera (7) are each equipped with an independent adjustment mechanism; The blowing assembly (8) includes a box frame (81) fixedly connected to the frame (1). Good product box (82), defective product box (83) and unmarked product box (84) are slidably connected on the box frame (81). Three blowing nozzles (85) are fixedly connected to the top of the box frame (81), each corresponding to a good product box (82), a defective product box (83) and an unmarked product box (84).

2. The laser marking machine according to claim 1, characterized in that, The vibrating feeding mechanism (2) includes a fixed plate (21) fixedly connected to the frame (1). A column (22) is fixedly connected to the top of the fixed plate (21). A clamping plate (23) is fixedly connected to the outer wall of the column (22). A feeding hopper (24) is connected through and fixedly connected to the clamping plate (23). A conveying box (25) is fixedly connected to the outer wall of the column (22). The conveying box (25) is located directly below the feeding hopper (24). A feeding vibrating plate (26) is fixedly connected to the top of the fixed plate (21). A conveying frame (27) is fixedly connected to the side wall of the feeding vibrating plate (26). The end of the conveying frame (27) extends to the top of the glass plate of the glass plate assembly (3).

3. A laser marking machine according to claim 1, characterized in that, An arc-shaped retaining ring is fixedly connected to the top of the glass disk assembly (3) along its outer contour, and the opening of the arc-shaped retaining ring faces the passage direction of the good product box (82), the defective product box (83) and the unmarked product box (84).

4. A laser marking machine according to claim 1, characterized in that, The adjustment mechanism includes a guide rail (13) fixedly connected to the frame (1), a slider (14) slidably connected to the outer wall of the guide rail (13), a T-shaped locking screw (15) threadedly connected to the slider (14), and the end of the T-shaped locking screw (15) abutting against the outer wall of the guide rail (13). The material guide assembly (4), camera assembly (5), laser marking head (6) and MARK point detection camera (7) are respectively fixedly connected to the side wall of their corresponding sliders (14).

5. A laser marking machine according to claim 1, characterized in that, The side walls of the good product box (82), the defective product box (83) and the unmarked product box (84) are all fixedly connected with C-shaped handles, and the outer walls of the C-shaped handles are covered with rubber protective sleeves.

6. A laser marking machine according to claim 1, characterized in that, The good product box (82), the defective product box (83) and the unmarked product box (84) all have openings at one end facing the glass plate assembly (3). The blowing nozzle (85) sprays towards the outer edge of the glass plate assembly (3) and is precisely aligned with the center of the opening of the corresponding product box.

7. A laser marking machine according to claim 1, characterized in that, The side wall of the frame (1) is provided with an inlet / outlet (9) and an inspection door (10). The front of the frame (1) is inlaid with transparent glass (11). The top of the frame (1) is fixedly connected with a three-color alarm light (12).

8. A laser marking machine according to claim 2, characterized in that, The discharge end of the feeding box (25) extends directly above the feed inlet of the feeding vibrating plate (26), and both sides of the feeding frame (27) are provided with upwardly extending baffles.

9. A laser marking machine according to claim 4, characterized in that, The T-shaped locking screw (15) has a rubber anti-slip pad fixedly connected to its abutting end, and the hand-held end of the T-shaped locking screw (15) is provided with anti-slip knurling.

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